Title of Invention

POLYMERIC BASED ELECTRIC INSULATION COATINGS

Abstract

A Coating composition is provided which can be used as high electrical insulation coating to various electrical equipments. The coating composition comprises thermoplastic polymer, fillers and additives. The Thermoplastic polymer having molecular weight in the range of 50000 to 200000 and molecular weight distribution in the range of 2.5 to 5 is prepared by polymerization of styrene based monomers, acrylate based monomers, methacrylate based monomers, solvents, mix of initiators & chain transfer agents. The Electric Insulation coatings offer high electric strength along with fire resistance and heat resistance properties in varied climatic conditions for critical electrical applications. Moreover, the composition is formulated to offer operation friendly applications with conventional application tools.

Full Text

FORM - 2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE Specification (See section 10; rule 13) POLYMERIC BASED ELECTRIC INSULATION COATINGS Dr. JOSHI KUSUM AND JOSHI SACHIN Indian Nationals R-406, TTC Industrial Area, M.I.D.C. Thane-Belapur Road, Rabale, Navi Mumbai-400706,Maharashtra India THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED. Field of Invention The present invention relates to insulation coating. The present invention envisages ready-to-use electric insulation coating and a process for producing the same. Background An insulator is a material that resists the flow of an electric current. Purpose of the electric insulation system is to ensure safety of human beings by avoiding current leakage from the live objects like conductors, bush bars, overhead cables, poles, etc., to ensure safety of electric equipments by avoiding flashovers due to vermin entries, moisture, contaminations etc, to safeguard maintenance engineer during repairs & rectification. Insulating material should satisfy the following requirements: • Resistance to UV Radiation • Resistance to Moisture • Resistance to Puncture • Resistance to Fire • Ease of Application • On Site Application Various Insulating Materials that are currently used include PVC Heat shrinkable Sleeves, Polyester sleeves, Shrouds, Insulating Papers, XLP Coating, Epoxy Coating LDPE Coating. However, the above mentioned insulating materials suffer from one or more of the shortcomings which include the insulating materials not suitable for outdoor exposure. In many cases, it is not possible to use the electrical insulating material for on-site application because of the form in which they are used. Furthermore, the application of the electrical insulating material is a very complicated process which necessitates various equipment and skilled man power. This adds to the overall cost of insulation. Still furthermore, once the insulation material is applied further touch up as well as rectification can prove to be a cumbersome and tedious exercise, especially because of the equipment and the man-power involved. Incase of fire, some of the insulating material releases harmful gases. Further the presently used electric insulation systems are all solid type of material. Storage, Handling, Usage & maintenance are of big concern. Moreover, all the properties of an ideal electrical insulation system as mentioned above cannot be fulfilled by either of the systems and use of such products is limited to specific service conditions There thus exists a need for a simple cost effective electric insulation coating which is easy to handle, easy to apply and which offers flexibility as regards to the maintenance and touch up options. Object of the invention It is an object of the present invention to provide an electric insulation coating suitable for an on-site application. Another object of the present invention is to provide an electric insulation coating that is easily applied on variety of surfaces by spraying, dipping, brushing , bar coating or rolling. Yet another object of the present invention is to provide an electric insulation coating that does not necessitate complicated equipments and skilled man power. Yet another object of the present invention is to provide an electric insulation coating that is in ready-to-use form. Yet another object of the present invention is to provide an electric insulation coating that is air dried at room temperature and does not necessitate the external drying equipments. Yet another object of the present invention is to provide an electric insulation coating that can be applied to the conducting surface without any prior special surface treatment of the conducting material. A further object of the present invention is to provide an electrical insulation coating that has high electrical strength and high tracking resistance. Still further object of the present invention is to provide a cost effective electrical insulation coating. Summary of the invention In accordance with the present invention there is provided a Polymeric Based Electric Insulation coating composition comprising: a) a thermoplastic polymer, the thermoplastic polymer prepared by polymerizing a resinous mixture comprising; i) 10 to 60% by weight of styrenic based monomers; ii) 5 to 45% by weight of acrylate based monomers; iii) 20 to 60% by weight of methacrylate based monomers; and iv) atleast one solvent in the range of about 20 to 70% by weight of total monomers. b) fillers in the range of about 5 to 20% by weight of composition; and c) additives in the range of about 2 to 25% by weight of composition. Typically, the styrenic based monomer is atleast one selected from a group monomers consisting of dimethyl styrene, trimenylstyrene, alfa-methyl styrene, styrene, p-tert-butylstyrene , and alfa methyl-p-methyl styrene . Typically, styrenic based monomer is in the range of about 30% to about 45% by weight. Typically, the acrylate based monomer is at least one selected from a group of monomers consisting of Butyl Acrylate, t-Butyl acrylates, methyl acrylates, Hexyl acrylates, Ethyl 2-ethyl acrylate , 2-ethoxy ethyl acrylate and 2-ethylhexylacrylate. Typically, acrylate based monomer is in the range of about 15% to about 35% by weight. Typically, the methacrylates based monomer is at least one selected from a group of monomers consisting of methylmethacrylate, 2-Ethoxyethyl methacrylate, 2-Butoxyethyl methacrylate, Allyl methacrylate, Butyl methacrylate, Hexyl methacrylate and t-butyl methacrylate. Typically, the methacrylates based monomer is in the range of about 30% to about 45% by weight. In accordance with the preferred embodiment of the present invention styrenic based monomer is styrene, acrylate based monomer is 2-ethyl hexylacrylate and methacrylates based monomer is methylmethacrylate. Typically, the solvent is aromatic hydrocarbon or aliphatic hydrocarbon. In accordance with the preferred embodiment of the present invention, the resinous mixture further comprises of initiators in the range of about 0.1 to about 3 % by weight of total monomers and chain transfer agent in the range of about 0.1 to about 1 % by weight of total monomers. Initiators is atleast one selected from a group consisting of organic peroxides and organic azo compounds . Various organic peroxides that can be used include benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2-5-bis(tertiary butyl- peroxy)hexane, n-butyl-4,4-bis(tertiary butylperoxy) valerate, 2,5- dimethyl-2,5-bis(tertiary butyl- peroxy)hexnye-3 ,tertiary-butyl perbenzoate, dicumyl peroxide, methyl ethyl ketone peroxide ,cumene hydroperoxide ,di- N-methyl-t-butyl percarbamate, lauroyl peroxide, acetyl peroxide ,decanoyl peroxide, t-butyl peracetate and t-butyl peroxyisobutyrate. Typically ,the organic azo compound is azobisisobutyronitrile. In accordance with the preferred embodiment of the present invention the chain transfer agent is n-dodecyl mercaptan. Atleast one additives is selected from a group consisting of reinforcing agents, coupling agents, pigments, colorants, dyes, odorants, other comonomers, resins, tackifiers, plasticizers, lubricants, stabilizers, and antistatic agents . Atleast one fillers is selected from a group consisting of Mica, Barium Sulphates, Silica, Calcium Carbonate, Talc and Clay. fn another aspect of the present invention, there is provided a process for preparing the Polymeric Based Electric Insulation coating composition comprising the following steps: a) Polymerizing a resinous mixture containing 10 to 60% by weight of styrene based monomers, 5 to .45% by weight of acrylate based monomers and 20 to 60% by weight of methacrylate based monomers in the presence of about 0.1 to about 3 % initiators by weight of total monomers and 2070% solvent by weight of total monomers at a temperature range of about 50 °C to about 150 °C; b) adding about 0.1 to about 1% of chain transfer agent by weight of total monomers to the resinous mixture during polymerization, when the degree of conversion of resinous mixture to the polymer is atleast 75%., to yield a thermoplastic polymer; c) Cooling the thermoplastic polymer to a temperature of about 30°C to about 50°C; and d) adding 5 to 20% fillers by weight of composition and 2 to 25% additives by weight of composition to the resultant thermoplastic polymer to obtain a coating for an electrical insulation. In accordance with the preferred embodiment of the present invention, the chain transfer agent is added to the resinous mixture during polymerization, when the degree of conversion of resinous mixture to the polymer is about 90%. In accordance with the preferred embodiment of the present invention, the thermoplastic polymer has molecular weight in the range of about 55000 to about 200000 and molecular weight distribution in the range of about 2 to about 5. In preferred embodiment of the present invention the coating composition is in liquid or fluid form. In preferred embodiment of the present invention the coating composition is applied to the conducting material by one of the process of spraying, dipping, brushing, bar coating or rolling and the coated material is air dried for a time effective to form an insulation coating on the conducting material without external heating or energy. In another aspect of the present invention a conducting wire is coated with the Polymeric Based Electric Insulation coating. There are also provided in accordance with the present invention plurality of conductors (wires) coated with Polymeric Based Electric Insulation coating in different colors. In accordance with another embodiment of the present invention, Polymeric Based Electric Insulation coatings are coated on properly buffed surface of Aluminum and/or copper to dry film thickness of 80 microns without primer application. Detailed Description of the Invention The present invention relates to electric insulation coating. The coating composition offers high electric strength along with fire resistance and heat resistance properties in varied climatic conditions for critical electrical applications. Moreover, the composition is formulated to offer an operation friendly application with conventional application tools. In accordance with the present invention there is provided a Polymeric Based Electric Insulation coating composition comprising: a) a thermoplastic polymer, the said thermoplastic polymer prepared by polymerizing a resinous mixture comprising; i) 10 to 60% by weight of styrenic based monomers; ii) 5 to 45% by weight of acrylate based monomers; iii) 20 to 60% by weight of methacrylate based monomers; and iv) atleast one solvent in the range of about 20 to 70% by weight of total monomers. b) fillers in the range of about 5 to 20% by weight of composition; and c) additives in the range of about 2 to 25% by weight of composition. MethaAcrylates shows an excellent out door exposure properties. Acrylate based monomer is at least one selected from a group of monomers consisting of methylmethacrylate, 2-Ethoxyethyl methacrylate, 2-Butoxyethyl methacrylate, Allyl methacrylate, Butyl methacrylate, Hexyl methacrylate and t-butyl methacrylate. Styrene brings the desired electric insulation properties. The Styrene based monomer is at least one selected from a group of monomers consisting of styrene, dimethyl styrene, trimethylstyrene, alfa-methyl styrene, vinyl toluene, p-tert-butyl styrene , and alfa methyl-p-methyl styrene. Acrylic esters or Acrylates are used to impart flexibility to the coating to adjust itself against bending & forming process of coated components. Acrylate based monomer is at least one selected from a group of monomers consisting of 2-Ethylhexylacrylate , Butyl Acrylate, t-Butyl acrylates, methyl acrylates, Hexyl acrylates, Ethyl 2-ethyl acrylate and 2-ethoxy ethyl acrylate. Solvent used is an aromatic hydrocarbon, preferably Toluene and xylene. In accordance with the preferred embodiment of the present invention, the resinous mixture further comprises of initiators in the range of about 0.1 to about 3 % by weight of total monomers and chain transfer agent in the range of about 0.1 to about 1 % by weight of total monomers. Initiators is atleast one selected from a group consisting of organic peroxides and organic azo compounds. Various organic peroxides that can be used include benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2-5-bis(tertiary butyl- peroxy)hexane, n-butyl-4,4-bis(tertiary butylperoxy) valerate ,2,5- dimethy 1 -2,5 -bis(tertiary butyl- peroxy)hexnye-3, tertiary-butyl perbenzoate, dicumyl peroxide ,methyl ethyl ketone peroxide, cumene hydroperoxide, di- N-methyl-t-butyl percarbamate, lauroyl peroxide, acetyl peroxide ,decanoyl peroxide, t-butyl peracetate and t-butyl peroxyisobutyrate. The organic azo compound is azobisisobutyronitrile. The chain transfer agent is n-dodecyl mercaptan. Various fillers that may be used include Mica, Barium Sulphates, Silica, Calcium Carbonate, Talc, and Clay. Atleast one additives is one selected from a group consisting of reinforcing agents, coupling agents, pigments, colorants, dyes, odorants, other comonomers, resins, tackifiers, plasticizers, lubricants, stabilizers, and antistatic agents. The thermoplastic polymer so obtained has molecular weight in the range of 50000 to 200000 and ratio of weight average molecular weight to Number average molecular weight in the range of 2.5 to 6. In accordance with another aspect of the present invention, there is provided a process for preparing the Polymeric Based Electric Insulation coating comprising: a) Polymerizing a resinous mixture containing 10 to 60% by weight of styrenic based monomers, 5 to 45% by weight of acrylate based, monomers and 20 to 60% by weight of methacrylate based monomers in the presence of about 0,1- about 3 % initiators by weight of total monomers and 20-70% solvent by weight of total monomers at a temperature range of about 50°C to about 150°C; b) adding about 0.1 to about 1% of chain transfer agent by weight of total monomers to the resinous mixture during polymerization, when the degree of conversion of resinous mixture to the polymer is atleast 75% , to yield a thermoplastic polymer; c) Cooling the thermoplastic polymer to a temperature in the range of about 30°C to about 50°C; and d) adding 5 to 20% fillers by weight of composition and 2 to 25% additives by weight of composition to the resultant thermoplastic polymer to obtain a coating composition for electric insulation. In the present invention, mixture of initiators based on organic peroxides and organic azo compounds such as Benzoyl Peroxide and azobisisobutyronitrile are used in a proportion of 0.1 to 3 % by weight of total monomers In a peculiar polymerization reaction, monomers in specified proportion are added at a time to the reactor. Mix of initiators are dissolved either in monomers or in 20 to 70 % solvents based on aromatic hydrocarbons like Toluene, xylene etc. Reactants are heated with continuous agitation. The reactants are heated and polymerization reaction is carried out in the temperature range of 50 to 150°C for a period of about 2 to 10 hrs to obtain thermoplastic polymer. The initiator mixture is dissolved in the monomer premix and the resultant resinous mixture is polymerized by Bulk or Solution polymerization technique, preferably polymerization is allowed to advance until the degree of conversion to thermoplastic polymer reaches to 60 to 99 %. In accordance with one aspect of the present invention, 85 to 90 % conversion to polymer is essential to develop high electric strength values. The high conversion is achieved by using 0.5 to 2 % of initiator mix comprising of Bezoyl Peroxide & azobisisobutyronitrile (AIBN). In case of bulk polymerization or solution polymerization, the chain transfer agent is preferably added at a stage where the degree of conversion of thermoplastic polymer reaches 70 to 90%. In accordance with the process of present invention, molecular weight and molecular weight distribution of thermoplastic polymer is preferred in the range of 55000 to 200000 and 2.0 to 5 respectively. Typically, the ratio of weight-average molecular weight, Mw to number average molecular weight Mn ( Mw / Mn) or molecular weight distribution of thermoplastic polymer measured by GPC must be within range of 2 to 5 to obtain desired performance properties as a coating. Similarly at higher molecular weight the mechanical, chemical, physical properties improve but the application with conventional tools becomes very difficult resulting into cob-webbing. At lower molecular weight, application becomes easy but loss of properties of the polymer makes the composition of no practical use. The invention will now be described with respect to the following examples which do not limit the invention in any way and only exemplify the invention. Experiment 1 to 12 A three liter round bottom flask is fitted with mechanical stirrer, condenser, heater and thermometer with inert gas inlet. An inert gas blanket is introduced to the flask. A mixture of Methymethaacrylate, Styrene, 2- Ethylhexylacrylate is fed to the reactor in the ratio of 20 - 60 /20-60/5-35 respectively. The polymerizaton is carried out at temperature ranging from 50 to 150° C in the presence of mixture of initiators like benzoyl peroxide and AIBN 0.1 to 3% and organic solvent like toluene, xylene in the range of 20 to 70%. Once the polymer conversion is reached to 85 to 95 % the polymer, chain transfer agent is added to yield thermoplastic polymer. The thermoplastic polymer is cooled to 35°C. Coating composition is prepared using above polymer, colorants & Coating additives. Examples No. Composition(Wt%) MMA ST EHA 1 47.5 47.5 5 2 35 55 10 3 55 35 10 4 42.5 42.5 15 5 40 40 20 6 35.5 40 24.5 7 40 30 30 8 32.5 32.5 35 9 35.5 40 24.5 10 35.5 40 24.5 11 35.5 40 24.5 32 35.5 40 24.5 Examples 9, 10,11,12 are carried out using varying amount of initiators as in Table 2. Various tests are performed on the fully cured coated panels and properties obtained are observed to be enhanced to the considerable extent. A mixture of Methymethacrylate, Styrene, 2-Ethylhexylacrylate in the ratio of 30 - 45 /30-45/15-35% by weight gave desired results as shown in Table 1,2 and 3. Coating compositions are coated on properly buffed surface of Aluminum and/or copper to dry film thickness of 80 microns without primer application. The coated panels are allowed to hard dry for 48 hrs. The coating is applied using various coating methods like Roll Coating, Bar Coating or Spray coating or brushing. The process of the present invention provides an effective electric insulation coating, with enhanced safety factor as compared to conventional insulation systems, good heat dissipation properties and easy way of application resulting into Energy saving, Time Saving, Manpower Saving & Cost Saving. In addition, coating produced by the process of present invention offers unique operational friendly properties like 1. Single pack system 2. Fast Drying at Room Temperature 3. Self Priming system Following tests are performed on the fully cured coated panels and properties obtained are observed to be enhanced to the considerable extent. 1. Electric Strength , Break Down Voltage 2. Oil Resistance 3. Tracking Resistance 4. Puncture Resistance 5. Permittivity Value 6. Flexibility & Impact Resistance 7. Thermal Resistance 8. Fire Resistance The above properties are tested in accordance with standards specified by ASTM and the resulting coating conforms to ASTM standards. TABLE-1 E X. N o. Composition (Wt%) Mw/Mn Properties MMA ST EHA Adhesion Scratch 3 Flexibility4 ELECTRIC STRENGT H6 1 47.5 47.5 5 2.0 Fail 2.0 kg 32 mm 2 35 55 10 2.1 Fail 2.5 kg 16 mm 3 55 35 10 2.1 Fail 2.5 kg 16 mm 4 42.5 42.5 15 2.0 25% Pass 3.0 kg 12 mm 5 40 40 20 2.0 50% Pass 3.5 kg 12 mm 6 35.5 40 24.5 2.0 Pass 4.2 kg 4 mm 6 KV 7 40 30 30 2.0 Pass 4.5 kg 4 mm 4.2 kv 8 32.5 32.5 35 2.0 Pass 3.5 kg 4 mm 5 kv 4. ASTM-D522 5. MMA :Methylmethaacrylate, EH Acrylate: 2-Ethylhexyl acrylate, ST: Styrene TABLE 2 Effect of Initiator on % solids in a composition of MMA/STYRENE/EHA in the ratio 35.5/40/24.5 as in example 6 Ex. No. Initiator (Wt %) % Solids Properties Adhesion2 Scratch3 Flexibility4 Electric Strength Thermal Stability 9 0.5 82 Pass 4.5 kg 4 mm 4.8. 200 10 0.8 94.5 Pass 4.0 kg 4 mm 5.2 200 11 1.35 96.8 Pass 3.2 kg 8 mm 6.0 200 12 2.0 overrun 1. PEROXIDE & AZO BASED INITIATORS based on Monomer feed. 2. ASTM- D 3359 3. ASTM-D 7027 4. ASTM-D 522 TABLE 3 Performance properties of coating composition using composition prepared n accordance with example 6 and example 11. Sr. No. Parameter Value Remarks 1. Electric Strength 5,5 kv/mm 2. Tracking Resistance 3. Permittivity 55 hzs 4. Oil Resistance Transformer oil at 120°C No Blistering 5. Resistance to Fire BS-163 Satisfactory TESTING FOR UV RADIATION RESISTANCE. Further tests are carried out on the coatings formed form the compositions 1. Ultra violet radiation resistant The coated samples are exposed to 254 nm UV lamp for 72 hrs. and drop of values in following properties are measured a. Loss of Gloss b. Adhesion c. Scratch Resistance d. Flexibility e. Impact The loss of properties observed was not more than 5%.. Technical Advancement and Economic Significance: The technical advancement associated with the coating composition of the present invention is provided herein below in terms of a comparison between the coating composition of the present invention and the prior art PVC sleeves that are used for electrical insulation purposes. These comparative observations are provided in the table 4 provided below. Table 4. Sr. No Parameters PVC Sleeves (Prior Art) Coating composition of the present invention 1 Form Tubings Free Flowing Liquid 2 Colour RYB RYB 3 Application Putting tube on busbar and controlled heating for shrinkage. Simple spray technique with conventional spray tools. 4 Criticality of Skill operation application a) chances of burning during heating process, b) chances of air bubble formation between sleeves & busbar. Non-skill operation & convenient process a) Quick drying at room temperature. b) no chance of air bubble formation. 5 Surface of application Not applicable on bend busbars, twisted busbars and on the shapes other than straight. Not convenient for busbars having long length. Geometry of busbars is not constrained, can be applied on any shape & size of busbars. 6 Puncture resistance Poor. Excellent. 7 In case of damage Calls for complete replacement. Touch up possible at damaged areas. 8 In case of fire Releases harmful chlorine gas. Melts without any harmful releases. 9 Inventory Huge inventory as per sizes of busbars. Low inventory. 10 Dielectric strength 2.5 KV 80 micron - 5 KV 1 mm - 55 KV 11 Heat dissipation properties Satisfactory Satisfactory 12 Thermal Stability 60 °C Stable up to 210u C 13 Additional Features Excellent Resistance to Chemicals & Corrosion / Oxidation Thus the coating composition of the present invention fulfills all the desired requirement of insulation with superior electric insulation strength as compared to conventional insulation systems. Industrial Applications: The coating composition of the present invention is useful for electric insulation coating in Electrical and Electronic Industries. Various applications of the coating composition of the present invention include but are not limited to the following : • For coating live objects like conductors, Bus bars, Electrical Equipments etc. • Coating of electrical equipments to avoid flashovers due to Vermin entries, Moisture, Contaminations etc. • For reducing phase to phase and phase top earth clearances • Coating of feeder pillars, pole junctions, current carrying wires, damaged insulators, distribution grids. While considerable emphasis has been placed herein on the specific steps of the preferred process, it will be appreciated that additional steps can be made and that many changes can be made in the preferred steps without departing from the principles of the invention. These and other changes in the preferred steps of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the * invention and not as a limitation. We Claim: 1) A Polymeric Based Electric Insulation coating composition comprising: a) a thermoplastic polymer, the thermoplastic polymer prepared by polymerizing a resinous mixture comprising; i) 10 to 60% by weight of styrenic based monomers; ii) 5 to 45% by weight of acrylate based monomers; iii) 20 to 60 % by weight of methacrylate based monomers; and iv) atleast one solvent in the range of about 20 to70% by weight of total monomers; b) fillers in the range of about 5 to 20% by weight of composition; and c) additives in the range of about 2 to 25% by weight of composition. 2) A Polymeric Based Electric Insulation coating composition as claimed in claim 1 wherein the styrenic based monomer is atleast one selected from a group of monomers consisting of dimethyl styrene, trimethyl styrene, alfa- methyl styrene, styrene, p-tert-butyl styrene, and alfa methyl-p-methyl styrene. 3) A Polymeric Based Electric Insulation coating composition as claimed in any one of the preceding claims wherein the styrenic based monomer is in the range of about 30% to about 45% by weight. 4) A Polymeric Based Electric Insulation coating composition as claimed in any one of the preceding claims wherein the styrenic based monomer is styrene. 5) A coating composition as claimed in claim 1 wherein the acrylate based monomer is atleast one selected from a group of monomers consisting of butyl acrylate, t-butylacrylates, methyl acrylates, hexyl acrylates, ethyl-2- ethylacrylate, 2-ethoxyethylacrylate and 2-ethylhexyl acrylate. 6) A coating composition as claimed in any one of the preceding claims wherein the acrylate based monomer is in the range of about 15% to about 35% by weight. 7) A coating composition as claimed in any one of the preceding claims wherein the acrylate based monomer is 2-ethylhexylacrylate. 8) A coating composition as claimed in claim 1, wherein the methacrylate based monomer is atleast one selected from a group of monomers consisting of methylmethacrylate, 2-ethoxy ethyl methaacrylate, 2-butoxyethyl methacrylate butyl methacrylate,t-butylmethacrylate, hexyl methacrylate and allylmethacrylate. 9) A coating composition as claimed in any one of the preceding claims wherein the methacrylate based monomer is in the range of about 30% to about 45% by weight. 10) A coating composition as claimed in any one of the preceding claims wherein the methacrylate based monomer is methylmethacrylate. 11) A coating composition as claimed in claim 1 wherein the solvent is atleast one aromatic hydrocarbon. 12) A coating composition as. claimed in claim l,wherein the resinous mixture further comprises of initiators in the range of about 0.1 to about 3 % by weight of total monomers. 13) A coating composition as claimed in claim 12 wherein, the initiator is at least one selected from a group consisting of organic peroxides and organic azo compounds. 14) A coating composition as claimed in claim 13 wherein the organic peroxide is atleast one selected from a group consisting of benzoyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis(tert-butyl-peroxy)hexane, n-butyl- 4,4-bis(tert-butylperoxy)valerate, 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexyne-3, tert-butyl perbenzoate,dicumyl peroxide , methyl ethyl ketone peroxide, cumene hydroperoxide, di-N-methyl-t-butyl percarbamate, lauroyl peroxide, acetyl peroxide, decanyl peroxide, t-butyl peracetate, and t-butyl peroxyisobutyrate. 15) A coating composition as claimed in claim 13 wherein the organic azo compound is azobisisobutyronitrile. 16) A coating composition as claimed in any one of the preceding claims wherein the initiator is a mixture of benzoyl peroxide and azobisisobutyronitrile. 17) A coating composition as claimed in claim 1,wherein the resinous mixture further comprises of chain transfer agent in the range of about 0.1 to about 1 % by weight of total monomers. 18) A coating composition as claimed in claim 17, wherein the chain transfer agent is n-dodecyl mercaptan. 19) A coating composition as claimed in any one of the preceding claims wherein the fillers is atleast one selected from a group consisting of Mica , Barium Sulphate , Silica, Calcium Carbonate, Talc, and Clay. 20) A coating composition as claimed in claim 1 where in the additives is atleast one selected from a group consisting of reinforcing agents, coupling agents, pigments, colorants, dyes, odorants, resins, tackifiers, plasticizers, lubricants, stabilizers, and antistatic agents. 21) A coating composition as claimed in any one of the preceding claims wherein, the molecular weight of thermoplastic polymer is in the range of about 55000 to about 200000. 22) A coating composition as claimed in any one of the preceding claims wherein, the molecular weight distribution of thermoplastic polymer is in the range of about 2 to about 5. 23) A process for preparing a Polymeric Based Electric Insulation Coating composition as claimed in claim 1 comprising; a) Polymerizing a resinous mixture containing 10 to 60% by weight of styrenic based monomers, 5 to 45% by weight of acrylate based monomers, 20 to 60% by weight of methacrylate based monomers and 20 to70% solvent by weight of total monomers in the presence of about 0.1 to about 3 % initiators by weight of total monomers at a temperature range of about 50°C to about 150 °C; b) adding chain transfer agent in an amount of about 0.1 to about 1% by weight of total monomers to the resinous mixture during polymerization, when the degree of conversion of resinous mixture to the polymer is atleast 75% , to yield a thermoplastic polymer; c) cooling the thermoplastic polymer to a temperature in the range of about 30°C to about 50°C; and c) adding 5 to 20% fillers by weight of composition and 2 to 25% additives by weight of composition to the resultant thermoplastic polymer to obtain a coating composition for electric insulation. 24) A process for preparing a Polymeric Based Electric Insulation Coating composition as claimed in claim 23, wherein the styrenic based monomer is atleast one selected from a group of monomers consisting of styrene, dimethyl styrene, trimethyl styrene, alfa-methyl styrene, vinyl toluene ,p- tert-butyl styrene, and alfa methyl-p-methyl styrene. 25) A process for preparing a coating composition as claimed in any one of the preceding claims wherein the styrenic based monomer is in the range of about 30% to about 45% by weight. 26) A process for preparing a coating composition as claimed in the any one of the preceding claims, wherein the styrenic based monomer is styrene. 27) A process for preparing a coating composition as claimed in claim 23 wherein the acrylate based monomer is atleast one selected from a group of monomers consisting of butyl acrylate,t-butylacrylates,methyl acrylates,hexyl acrylates,ethyl-2-ethyl acrylate , 2-ethoxy ethyl acrylate and 2- ethyl hexyl acrylate . 28) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the acrylate based monomer is in the range of about 15% to about 35% by weight. 29) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the acrylate monomer is 2- ethyl hexyl acrylate. 30) A process for preparing a coating composition as claimed in claim 23, wherein the methacrylate based monomer is atleast one selected from a group of monomers consisting of methylmethacrylate, 2-ethoxy ethyl methaacrylate, 2-butoxyethylmethacrylatebutylmethacrylate,t-butylmethacrylate,hexyl methacrylate and allylmethacrylate. 31) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the methacrylate based monomer is in the range of about 30% to about 45% by weight. 32) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the methacrylate based monomer is methylmethacrylate. 33) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the initiator is atleast one selected from a group consisting of organic peroxides and organic azo compounds. 34) A process for preparing a coating composition as claimed in any one of the preceding claim wherein the organic peroxide is atleast one selected from a group consisting of benzoyl peroxide, di-t-butyl peroxide, 2,5- dimethyl-2,5-bis(tert-butyl-peroxy)hexane, n-butyl-4,4-bis(tert- butylperoxy)valerate, 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexyne-3, tert- butyl perbenzoate,dicumyl peroxide , methyl ethyl ketone peroxide, cumene hydroperoxide, di-N-methyl-t-butyl percarbamate, lauroyl peroxide, acetyl peroxide, decanyl peroxide, t-butyl peracetate and t-butyl peroxyisobutyrate. 35) A process for preparing a coating composition as claimed in any one of the preceding claims wherein the organic azo compound is azobisisobutyronitrile. 36) A process for preparing a coating composition as claimed in any one of the preceding claims wherein the initiator is a mixture of benzoyl peroxide and azo bis isobutyronitrile. 37) A process for preparing a coating composition as claimed in any one of the preceding claims, wherein the solvent is atleast onearomatic hydrocarbon. 38) A process for preparing a coating composition as claimed in any one of the preceding claims, wherein the chain transfer agent is n-dodecyl mercaptan. 39) A process for preparing a coating composition as claimed in any one of the preceding claims, wherein n-dodecyl mercaptan is added to the resinous mixture during polymerization, when the degree of conversion of resinous mixture to the polymer is about 90%. 40) A process for preparing a coating composition as claimed in any one of the preceding claims, wherein the thermoplastic polymer has molecular weight in the range of about 55000 to about 200000. 41) A process for preparing a coating composition as claimed in any one of the preceding claims, wherein the thermoplastic polymer has molecular weight distribution in the range of about 2 to about 5. 42) A process for preparing a coating composition as claimed in any one of the preceding claims wherein the fillers is atleast one selected from a group consisting of Mica , Barium Sulphate , Silica, Calcium Carbonate, Talc, and Clay. 43) A process for preparing a coating composition as claimed in any one of the preceding claims where in the additives is atleast one selected from a group consisting of reinforcing agents, coupling agents, pigments, colorants, dyes, odorants, resins, tackifiers, plasticizers, lubricants, stabilizers, and antistatic agents. 44) A Polymeric Based Electric Insulation coating composition and process thereof as described in the description and examples of the accompanying specification.

Documents:

2693-mum-2009-abstract(25-2-2010).doc

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2693-MUM-2009-ANNEXURE TO FORM 3(28-10-2013).pdf

2693-mum-2009-claims(25-2-2010).doc

2693-MUM-2009-CLAIMS(25-2-2010).pdf

2693-MUM-2009-CLAIMS(AMENDED)-(6-1-2014).pdf

2693-MUM-2009-CLAIMS(MARKED COPY)-(6-1-2014).pdf

2693-MUM-2009-CORRESPONDENCE(2-12-2010).pdf

2693-MUM-2009-CORRESPONDENCE(25-2-2010).pdf

2693-MUM-2009-CORRESPONDENCE(28-10-2013).pdf

2693-MUM-2009-CORRESPONDENCE(28-5-2010).pdf

2693-MUM-2009-CORRESPONDENCE(9-8-2011).pdf

2693-MUM-2009-CORRESPONDENCE(IPO)-(9-7-2010).pdf

2693-mum-2009-correspondence.pdf

2693-MUM-2009-DESCRIPTION(COMPLETE)-(25-2-2010).pdf

2693-mum-2009-desription(provisional).pdf

2693-mum-2009-form 1.pdf

2693-MUM-2009-FORM 18(2-12-2010).pdf

2693-mum-2009-form 2(25-2-2010).doc

2693-mum-2009-form 2(25-2-2010).pdf

2693-MUM-2009-FORM 2(TITLE PAGE)-(25-2-2010).pdf

2693-MUM-2009-FORM 2(TITLE PAGE)-(COMPLETE)-(25-2-2010).pdf

2693-MUM-2009-FORM 2(TITLE PAGE)-(PROVISIONAL)-(23-11-2009).pdf

2693-mum-2009-form 2(title page).pdf

2693-mum-2009-form 2.pdf

2693-MUM-2009-FORM 26(27-3-2014).pdf

2693-mum-2009-form 26.pdf

2693-MUM-2009-FORM 3(23-11-2009).pdf

2693-MUM-2009-FORM 3(28-5-2010).pdf

2693-mum-2009-form 3.pdf

2693-MUM-2009-FORM 5(25-2-2010).pdf

2693-MUM-2009-FORM PCT-ISA-237(28-10-2013).pdf

2693-MUM-2009-OTHER DOCUMENT(28-10-2013).pdf

2693-MUM-2009-PETITION UNDER RULE 137(27-3-2014).pdf

2693-MUM-2009-REPLY TO EXAMINATION REPORT(6-1-2014).pdf

2693-MUM-2009-REPLY TO HEARING(27-3-2014).pdf