Title of Invention

" A FIRE RETARDANT, LOW SMOKE COATING COMPOSITION AND A PROCESS FOR THE PREPARATION THEREOF"

Abstract

This invention relates to a fire retardant, low smoke coating composition. The composition comprises 11.1±1% poly (vinyl acetate), 22.2+2% aluminium trihydroxide, 2.7±0.5% aluminium silicate, 6.7±0.5% antimony trioxide, 4.4±0.5% chlorinated paraffin wax and 52.9±5% water. Further this invention relates to a process for preparation of fire retardant low smoke coating composition. The process comprises resolving aluminium silicate in water. Poly (vinyl acetate) is added thereto under stirring. Aluminium trihydroxide is mixed with said mixture and stirred the same vigourously, and then antimony trioxide having chlorinated paraffin mixed therewith is added to said mixture under stirring to obtain said fire retardant composition.

Full Text

This invention relates to a fire retardant/ low smoke coating composition and to a process for the preparation thereof. Electricity is reported to cause in as much as 24% of the fires in the world in the recent past. The frequency of electrical fires could be concluded as the inevitable results of the large number of electrical components equipments and systems in use. Cable is major culprit which helps in the propagation of fire as the same cable runs into various portion/rooms of a building. Sometimes it can also contributes in initiation of fire as breakdown of insulation often results in arcing and concentration of heat at the fault location. This heat ignites the conductor insulation especially when cables are spread together. Power cable are usually insulated or sheathed with Poly vinyl chloride (PVC) which contributes to the rapid ( 20 meter/min) spread of fire. The insulation also gives off toxic products due to combustion including corrosive gases/ when it is exposed to intense heat or is involved in fire. A cable run carrying PVC cables with 10 kg/m of cumbustible insulation, when involved in a fire, produces as much as 10/000 m of smoke and acidic atmosphere. One kilogram of ordinary PVC compound, when involved in fire/ will emit 360 gm of HC1 gas which when dissolved in water vapour/ produces one litre of concentrated smoking hydrochloric acid. An object of this invention is to propose a fire resistant low smoke compositionn having acceptable properties such as flexibility, adhesion, thermal stability and resistance to environmental ageing besides excellent fire retardant property. Yet another object of this invention/ is to propose a fire retardant low smoke coating composition which can be applied on any solid surface, textile, paper, plastics/ wood etc. Still another object of this invention is to propose a fire retardant, low smoke coating composition which is fast curing at ambient temperature. According to this invention there is provided a fire retardant, low smoke coatingg composition comprising 11.1 + 1% Poly ( vinyl acetate ), 22.2 + 2% aluminium trihydroxide/ 2.7 + 0.5% aluminium silicate, 6.7 + 0.5% antimony trioxide/ 4.4 + 0.5% chlorinated paraffin wax and 52.9 + 5% water. Further according to this invention there is provided a process for preparation of fire retardant low smoke coating composition comprising resolving Aluminium silicate in water/ adding Poly ( vinyl acetate ) thereto under stirring/ mixing Aluminium trihydroxide with said mixture and stirring the same vigourously/ and the adding Antimony trioxide having chlorinated paraffin mixed therewith to said mixture under stirring to obtain said fire retardant composition. In accordance with this invention the fire retardant low smoke coating composition has 11.1 + 1% Poly ( vinyl acetate ) 22.2 + 2% Aluminium silicate, 2.7 + 0.5% Aluminium silicat, 6.7 + 0.5% Antimony trioxide, 4.4 + .05% chlorinated paraffin wax and 52.9 + 5% water. All these ingridients are dissolved in water to get the composition. Further in accordance with the process of this invention Aluminium silicate is resolved in water at room temperature. Poly ( vinyl acetate ) is added to the above mixture under stirring. Subsequently aluminium trihydroxide is mixed with the above mixture and the mixture is stirred vigorously. Now Antimony trioxide mixed with chlorinated paraffin is added to the above mixture and the mixture so obtained is stirred well to get the fire retardant composition. A fire retardant low smoke coating composition and a process for the preparation thereof according to a preferred embodiment is herein described in detail in the following examples:- For preparing 1000 gram of fire retardant low smoke coating composition 27 gram Aluminium silicate was resolved in 529 gm water at room temperature. Ill gm Poly ( vinyl acetate ) was added to the above mixture under stirring. To this mixture 222 gm Aluminium trihydroxide was mixed and the mixture was stirred vigorously. 67 gm Antimony trioxide mixed with 44 gm chlorinated paraffin was added to the mixture and was stirred well in order to obtain a fire retardant low smoke coating composition. The viscosity and specific gravity was measured at 27 + 2 ° C and it was found that the viscosity was around 80,000 Centipoise and the density was around 1 to 1.1 gm/cm respectively. The fire refardant of by this process has synergetic properties WE CLAIM 1. A fire retardant/ low smoke coating composition comprising 11.1 + 1% Poly ( vinyl acetate )/ 22.2 + 2% aluminium trihydroxide/ 2.7 + 0.5% aluminium silicate/ 6.7 + 0.5% antimony trioxide, 4.4 + 0.5% chlorinated paraffin wax and 52.9 + 5% water. 2. A process for preparation of fire retardant low smoke coating composition comprising resolving Aluminium silicate in water/ adding Poly ( vinyl acetate ) thereto under stirring/ mixing Aluminium trihydroxide with said mixture and stirring the same vigourously/ and then adding Antimony trioxide having chlorinated paraffin mixed therewith to said mixture under stirring to obtain said fire retardant composition. 3. A process as claimed in claim 2 wherein 2.7 + 0.5% aluminium silicate is resolved in 52.9 + 5% water/ 11.1 + 1% Poly ( vinyl acetate ) is added to the above mixture under stirring and then 22.2 + 2% aluminium trihydroxide is added to the above mixture and the mixture is stirred vigorously to this mixture 2.7 + 0.5% antimony trioxide mixed with 4.4 + .5% chlorinated paraffin is added and the mixture so obtained is stirred well to get the fire retardant composition. 4. A process as claimed in claim 2 wherein said aluminium silicate is resolved in water at room temperature. 5. A fire retardant substantially as herein described and illutrated. 6. A process for preparation of fire retardant low smoke coating composition substantially as herein described and il lutrated.

Documents:

1783-del-1997-abstract.pdf

1783-del-1997-claims.pdf

1783-del-1997-correspondence-others.pdf

1783-del-1997-correspondence-po.pdf

1783-del-1997-description (complete).pdf

1783-del-1997-form-1.pdf

1783-del-1997-form-19.pdf

1783-del-1997-form-2.pdf

1783-del-1997-form-3.pdf

1783-del-1997-form-4.pdf

1783-del-1997-form-5.pdf

1783-del-1997-form-6.pdf

1783-del-1997-gpa.pdf