Title of Invention

A PROCESS FOR CONTINUOUSLY COATING METAL STRIPS BY A COIL COATING PROCESS

Abstract A coating for metals containing a polysilazane solution or a mixture of polysilazanes of general formula (1)-(SiR'R"-NR")a-(1) wherein R',R", R'" are identical or different and independently represent hydrogen or an optionally substituted alkyl-. Aryl-, vinyl or (trialkoxysilyl) alkyl radical, wherein n is a whole number and n is dimensioned in wuch a way that polysilazane has an average molecular weight or 150-150.000 g/mol, in a solvent and at least one catalysts. The invention also relates to a method for the production of the coating.
Full Text

Description
The present invention relates to the use of polysilazanes for coating metal strips by
the coil coating process.
Thin metal strips, made for example of aluminum, steel or zinc, are usually coated by
the process known as coil coating. In this process, coating materials are applied via
rolls or by spraying to the metal strip ("coil"), the coating material is heat-cured in a
drying section, and the coated strips are subsequently rolled up.
The requirements imposed on such coating materials are, primarily, high mechanical
deformability, since the metal strips are machined and brought into their subsequent
form only after coating, and rapid curing of the coating material at high temperatures,
since the strips are run at high speed through the coil coating installations. Curing
takes place typically at oven temperatures of 200-350°C, the PMT (peak metal
temperature) attained being around 160-260°C (Rbmpp Lexikon Lacke and
Druckfarben, Georg Thieme Verlag, Stuttgart, 1998).
The coating materials usually used in coil coating are composed of organic binder
systems such as, for example, polyester resins, epoxy resins, acrylic resins, poly-
urethane resins or fluorocarbon resins; in some cases, two different coating materials
must be used, as primer and as topcoat, in order to allow the requirements (particu-
larly in respect of the corrosion resistance of the coating) to be met.
One disadvantage of the known coating materials is their weathering stability, which
because of their organic nature is limited, with the consequence that, particularly in
the case of outdoor applications, the binder matrix breaks down over time.
A further disadvantage of the known coating systems is their low scratch resistance,
since the coatings are to be as flexible as possible in order to allow the metal strip to
be processed.

The chemical resistance of the conventional binder systems, too, leaves something
to be desired when they are in contact with solvents or with acidic or alkaline sub-
stances, such as occurs in the case of outdoor applications as a result, for example,
of acid rain or of soiling by bird droppings.
From the literature it is known that polysilazane coatings are able to protect metals
against corrosion; to date, however, the only coating processes disclosed have been
those in which curing must be carried out over a relatively long period of time, and
which are hence not suitable for the coil coating process.
JP2001 172 795 describes the surface sealing of anodized aluminum with a poly-
silazane, which by treatment at high temperature is converted to a silicon dioxide
film. In Example 1 aluminum is spray-coated with an unspecified polysilazane, then
dried at 80°C for 30 minutes and subsequently calcined at 400°C for 2 hours. This
laborious curing procedure and the high temperature make the process unsuitable
for coil coating.
US 6,627,559 teaches the use of a coating system comprising polysilazanes which
ensure corrosion control. The system in question has at least two layers, which
comprise different mixtures of polysilazanes. It is important there to tailor the mixing
ratio of the polysilazanes to the layer structure in order to obtain crack-free coatings.
In the examples described the layers are applied by spin coating to steel disks and,
after one layer has been applied, curing takes place at 300°C for 1 hour. A process
of this kind is unsuitable for the rapid coating of metals by coil coating, since on the
one hand the cure time is too long and on the other hand a multiple pass through the
coating installation would be needed.
WO 2004/039 904 describes the use of a polysilazane solution for coating a variety
of substrates. Included in this, in Examples 7 to 13, is the production of a corrosion
control layer on aluminum. The polysilazane solution is applied by flooding and the
coating is cured by heating at 120°C for 1 hour. Accordingly this process is not
suitable for use for the coil coating of metal strips.

It was an object of the present invention to develop a coating for the coil coating
process that affords very good corrosion control, is highly resistant to light and
weathering and, furthermore, prevents the scratching of the metal.
Surprisingly it has now been found that high-quality coil coatings can be produced
using polysilazanes by means of short curing at high temperatures, these coatings
being very hard and yet sufficiently flexible and exhibiting, even under mechanical
stress, very good adhesion to the metal strip, and so meeting these requirements.
The invention accordingly provides a coating for coating metals, comprising a solu-
tion of a polysilazane or a mixture of polysilazanes of the formula 1

where R', R" and R'" are identical or different and independently of one another are
hydrogen or an unsubstituted or substituted alkyl, aryl, vinyl or (trialkoxysilyl)alkyl
radical, n being an integer and being such that the polysilazane has a number-
average molecular weight of 150 to 150 000 g/mol, in a solvent and at least one
catalyst.
Particularly suitable are polysilazanes in which R', R" and R'" independently of one
another are a radical from the group consisting of hydrogen, methyl, ethyl, propyl,
isopropyl, butyl, isobutyl, tert-butyl, phenyl, vinyl, 3-(triethoxysilyl)propyl, and 3-(tri-
methoxysilyl)propyl.
In one preferred embodiment perhydropolysilazanes of the formula 2 are used for
the coating of the invention

where n is an integer and is such that the polysilazane has a number-average
molecular weight of 150 to 150 000 g/mol and comprises a solvent and a catalyst.

In another preferred embodiment the coating of the invention comprises polysila-
zanes of the formula (3)

where R', R", R'", R*, R**, and R*** independently of one another are hydrogen or
an unsubstituted or substituted alkyl, aryl, vinyl or (trialkoxysilyl)alkyl radical, n and p
being integers and n being such that the polysilazane has a number-average
molecular weight of 150 to 150 000 g/mol.
Particular preference is given to compounds in which
R', R'", and R*** are hydrogen and R", R*, and R** are methyl;
R', R'", and R*** are hydrogen, R" and R* are methyl, and R** is vinyl;
R', R'", R*, and R*** are hydrogen and R" and R** are methyl.
Preference is likewise given to using polysilazanes of the formula (4)

where R', R", R'", R*, R**, R***, R1, R2, and R3 independently of one another are
hydrogen or an unsubstituted or substituted alkyl, aryl, vinyl or (trialkoxysilyl)alkyl
radical, n, p and q being integers and n being such that the polysilazane has a
number-average molecular weight of 150 to 150 000 g/mol.
Particular preference is given to compounds in which
R', R'", and R*** are hydrogen, R", R*, R**, and R2 are methyl, R3 is (triethoxysilyl)-
propyl and R1 is alkyl or hydrogen.
In general the fraction of polysilazane in the solvent is 1% to 50% by weight poly-
silazane, preferably 3% to 30% by weight, more preferably 5% to 20% by weight.
Suitable solvents for the polysilazane formulation include particularly organic sol-
vents which contain no water and no reactive groups (such as hydroxyl or amine

groups). These are, for example, aliphatic or aromatic hydrocarbons, halogenated
hydrocarbons, esters such as ethyl acetate or butyl acetate, ketones such as
acetone or methyl ethyl ketone, ethers such as tetrahydrofuran or dibutyl ether, and
also mono- and polyalkylene glycol dialkyl ethers (glymes), or mixtures of these
solvents.
A further constituent of the polysilazane formulation may be additives, which, for
example, influence formulation viscosity, substrate wetting, film formation, or
evaporation behavior, or inorganic nanoparticles such as SiO2, TiO2, ZnO, ZrO2 or
AI2O3, for example.
The catalysts used may for example be organic amines, acids, or metals or metal
salts, or mixtures of these compounds.
The catalyst is used preferably in amounts of 0.001% to 10%, in particular 0.01% to
6%, more preferably 0.1% to 3%, based on the weight of the polysilazane.
Examples of amine catalysts are ammonia, methylamine, dimethylamine, trimethyl-
amine, ethylamine, diethylamine, triethylamine, n-propylamine, isopropylamine, di-n-
propylamine, diisopropylamine, tri-n-propylamine, n-butylamine, isobutylamine, di-n-
butylamine, diisobutylamine, tri-n-butylamine, n-pentylamine, di-n-pentylamine, tri-n-
pentylamine, dicyclohexylamine, aniline, 2,4-dimethylpyridine, 4,4-trimethylenebis(1-
methylpiperidine), 1,4-diazabicyclo[2.2.2]octane, N,N-dimethylpiperazine, cis-2,6-
dimethylpiperazine, trans-2,5-dimethylpiperazine, 4,4-methylenebis(cyclohexyl-
amine), stearylamine, 1,3-di(4-piperidyl)propane, N,N-dimethylpropanolamine, N,N-
dimethylhexanolamine, N,N-dimethyloctanolamine, N,N-diethylethanolamine,
1-piperidineethanol, and 4-piperidinol.
Examples of organic acids are acetic acid, propionic acid, butyric acid, valeric acid,
and caproic acid.
Examples of metals and metal compounds as catalysts are palladium, palladium
acetate, palladium acetylacetonate, palladium propionate, nickel, nickel acetyl-
acetonate, silver powder, silver acetylacetonate, platinum, platinum acetyl acetonate,

ruthenium, ruthenium acetylacetonate, ruthenium carbonyls, gold, copper, copper
acetylacetonate, aluminum acetylacetonate, and aluminum tris(ethyl acetoacetate).
Depending on the catalyst system used the presence of moisture or of oxygen may
play a part in connection with the curing of the coating. For instance, by selecting an
appropriate catalyst system, rapid curing may be achieved at high or low atmos-
pheric humidity or at high or low oxygen content. The skilled worker is aware of these
influences and will adjust the atmospheric conditions accordingly by means of
appropriate optimization methods.
The invention further provides a process in which metal strips are coated with a
polysilazane solution by the coil coating process.
The coil coating process is described in detail for example in Rompp Lexikon Lacke
und Druckfarben, Georg Thieme Verlag, Stuttgart, 1998. Said item of literature is
hereby explicitly incorporated by reference. The conduct and optimization of the
process are familiar to the skilled worker. A more detailed exposition of this process
will therefore not be undertaken in connection with the present invention.
Finally the invention provides the metal strips coated in accordance with the
invention.
The polysilazane-based coating of the invention is applied by the usual coil coating
process: in other words, application to the coil takes place alternatively via a roll, by
spraying, or by coating in an immersion bath. Application may take place either to
one side of the coil or to the face and reverse simultaneously. Thereafter the strips
are passed on to a drying section.
Prior to application of the coating it is possible first of all to apply a primary coat,
which may contribute to improving the adhesion of the polysilazane film to the metal
strip. Typical primers are those based on silanes such as, for example, 3-amino-
propyltriethoxysilane, 3-glycidyloxypropyltriethoxysilanes,
3-mercaptopropyltrimethoxysilanes, vinyltriethoxysilanes,
3-methacryloyloxypropyltrimethoxysilanes, N-(2-aminoethyl)-3-

aminopropyltrimethoxysilanes, bis(3-triethoxysilylpropyl)amines, N-(n-butyl)-3-
aminopropyltrimethoxysilanes, and N-(2-aminoethyl)-3-aminopropylmethyldimethoxy-
silanes.
Polysilazanes can be cured at high temperature in a very short time, thus ensuring
sufficient curing in the drying section. Since polysilazanes enjoy great temperature
stability, a higher curing temperature is possible than in the case of conventional
coating systems, as well. The only limits on this temperature are generally those
imposed by the thermal deformability of the metal strip.
Curing of the polysilazane coating in the coil coating process takes place preferably
at an oven temperature of 150 to 500°C, preferably 180 to 350°C, more preferably
200 to 300°C. The drying time is usually 10 to 120 seconds, depending on the film
thickness. In accordance with the thickness and nature of the metal strip and the
construction of the drying section, a peak metal temperature (PMT) of 100 to 400°C
is attained here, preferably 150 to 300°C, more preferably 200 to 260°C.
Besides curing by conventional drying it is also possible to use radiant dryers based
on IR or NIR technology. In this case these dryers are operated in the wavelength
range from 12 to 1.2 micrometers or 1.2 to 0.8 micrometers respectively. Typical
radiation intensities are in the range from 5 to 1000 kW/m2.
Coating with the polysilazane formulation may be followed by a further aftertreat-
ment to adapt the surface energy of the coating. By this means it is possible to pro-
duce, alternatively, hydrophilic, hydrophobic or oleophobic surfaces, which influence
the soiling tendency.
Metals used with preference for coating are, for example, aluminum, steel, galvan-
ized steel, zinc, magnesium, titanium or alloys of these metals. The metals or metal
strips may have been pretreated, by means for example of chromating, chromate-
free pretreatment, anodizing or vapor deposition with metal oxide films.
With the polysilazane coating of the invention it is possible to obtain very good
corrosion control, with a significantly thinner coat than in the case of conventional coil
coating materials being sufficient. The cured polysilazane coating normally has a

coat thickness of 0.1 to 10, preferably 0.5 to 5, more preferably 1 to 3 micrometers.
The reduced level of material consumption achieved in this way is ecologically
advantageous, since the amount of solvent used is reduced. Moreover, there is no
need for an undercoat, since the thin polysilazane coat itself provides a sufficiently
high protective effect.
In view of the organic nature of the coating it is extraordinarily resistant to UV and to
weathering.
The coils coated in accordance with the invention can be used for any of a very wide
variety of applications, in the construction sector for instance, in vehicle construction
or in the manufacturing of household appliances. These may be, for example, ceiling
or wall elements, window profiles, roller shutters, reflectors, bodywork components,
or components of household appliances.
Examples
The perhydropolysilazanes used are products of Clariant Japan K.K. The solvent
used is di-n-butyl ether (designation NL).
The solution contains (0.75% by weight) palladium propionate, relative to the
perhydropolysilazane, as catalyst.
The curing conditions in the examples were chosen so as to be comparable with
those in a coil coating installation.
In the examples below, parts and percentages are by weight.
Example 1 (Coating an aluminum panel)
An aluminum panel with a thickness of 0.5 mm is immersed into an immersion
apparatus filled with a 20% strength perhydropolysilazane solution NL120A-20
(Clariant Japan) and withdrawn at a speed of 120 cm/min. Directly after coating, the
panel is introduced into a forced-air drying oven preheated to a temperature of
250°C, and left there for 60 seconds. During this time a peak metal temperature
(PMT) of 240°C is attained. The result after cooling is a clear, transparent, and

crack-free coating.
Example 2 (Coating an aluminum panel)
An aluminum panel with a thickness of 0.5 mm is immersed into an immersion
apparatus filled with a 10% strength perhydropolysilazane solution NL120A-20
(Clariant Japan) and withdrawn at a speed of 120 cm/min. Directly after coating, the
panel is introduced into a forced-air drying oven preheated to a temperature of
250°C, and left there for 30 seconds. During this time a peak metal temperature
(PMT) of 240°C is attained. The result after cooling is a clear, transparent, and
crack-free coating.
Example 3 (Coating an eloxed aluminum panel)
An eloxed aluminum panel with a thickness of 0.5 mm is immersed into an immer-
sion apparatus filled with a 20% strength perhydropolysilazane solution NL120A-20
(Clariant Japan) and withdrawn at a speed of 120 cm/min. Directly after coating, the
panel is introduced into a forced-air drying oven preheated to a temperature of
250°C, and left there for 60 seconds. During this time a peak metal temperature
(PMT) of 240°C is attained. The result after cooling is a clear, transparent, and
crack-free coating.
Example 4 (Coating a surface-modified aluminum panel)
An aluminum panel 0.5 mm thick, to whose surface a TiO2 and SiO2 oxide film has
been applied beforehand, is immersed into an immersion apparatus filled with a 20%
strength perhydropolysilazane solution NL120A-20 (Clariant Japan) and withdrawn at
a speed of 120 cm/min. Directly after coating, the panel is introduced into a forced-
air drying oven preheated to a temperature of 250°C, and left there for 60 seconds.
During this time a peak metal temperature (PMT) of 240°C is attained. The result
after cooling is a clear, transparent, and crack-free coating.
Example 5 (Surface-modified aluminum panel with IR curing)

An aluminum panel 0.5 mm thick, to whose surface a TiO2 and SiO2 oxide film has
been applied beforehand, is immersed into an immersion apparatus filled with a 20%
strength perhydropolysilazane solution NL120A-20 (Clariant Japan) and withdrawn at
a speed of 120 cm/min. Directly after coating, the panel is irradiated from the under-
side in an IR dryer (tungsten lamps) for 50 seconds. A peak metal temperature
(PMT) of 240°C is attained in this time. The result after cooling is a clear,
transparent, and crack-free coating.
Example 6 (Coating a zinc panel)
A zinc panel with a thickness of 0.8 mm is immersed into an immersion apparatus
filled with a 10% strength perhydropolysilazane solution NL120A-20 (Clariant Japan)
and withdrawn at a speed of 120 cm/min. Directly after coating, the panel is intro-
duced into a forced-air drying oven preheated to a temperature of 260°C, and left
there for 30 seconds. During this time a peak metal temperature (PMT) of 230°C is
attained. The result after cooling is a clear, transparent, and crack-free coating.
Example 7 (Coating a zinc panel)
A zinc panel with a thickness of 0.8 mm is immersed into an immersion apparatus
filled with a 20% strength perhydropolysilazane solution NL120A-20 (Clariant Japan)
and withdrawn at a speed of 120 cm/min. Directly after coating, the panel is intro-
duced into a forced-air drying oven preheated to a temperature of 260°C, and left
there for 60 seconds. During this time a peak metal temperature (PMT) of 240°C is
attained. The result after cooling is a clear, transparent, and crack-free coating.
Example 8 (Coating a zinc panel)
A zinc panel with a thickness of 0.8 mm is immersed into an immersion apparatus
filled with a mixture of a 20% strength perhydropolysilazane solution NL120A-20
(Clariant Japan) and a 10% solution of a polymethylsilazane in petroleum spirit
(prepared by the process described in Example 1 in US 6,329,487) in a ratio of
2.83:1 and withdrawn at a speed of 120 cm/min. Directly after coating, the panel is
introduced into a forced-air drying oven preheated to a temperature of 260°C, and

left there for 60 seconds. During this time a peak metal temperature (PMT) of 240°C
is attained. The result after cooling is a clear, transparent, and crack-free coating.
Example 9 (Corrosion test)
The corrosion resistance of the coated zinc panels from Examples 6 to 8 is tested in
a condensation-water alternating-atmosphere test (KFW) in accordance with ISO
6270-4. After an exposure time of 25 cycles the samples are evaluated. The results
obtained are as follows:

Example 10 (Determination of scratch resistance)
The scratch resistance is determined by multiple exposure (five back-and-forth rubs)
with grade 00 steel wool at a force of 3N. The scratching is evaluated visually in
accordance with the following scale: very good (no scratches), good (few scratches),
satisfactory (significant scratches), adequate (severely scratched), and deficient
(very severely scratched).



The adhesion of the coating is determined by a cross-cut test in accordance with DIN
EN ISO 2409, adhesion occurring on a scale from 0 (best score) to 5 (worst score).



WE CLAIM:
1. A coating for coating metals according to the coil coating process,
comprising a solution of a polysilazane or a mixture of polysilazanes of
the formula 1

where R', R" and R'" are identical or different and independently of one
another are hydrogen or an unsubstituted or substituted alkyl, aryl,
vinyl or (trialkoxysilyl)alkyl radical, n being an integer and being such
that the polysilazane has a number-average molecular weight of 150 to
150000g/mol, in a solvent and at least one catalyst, and the polysilazane
solution contains 1% to 50% by weight of the polysilazane.
2. The coating as claimed in claim 1, wherein R', R", and R"'
independently of one another are a radical from the group consisting of
hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl,
phenyl, vinyl, 3-(triethoxysilyl)propyl, and 3-(trimethoxysilyl)propyl.
3. The coating as claimed in claim 1 or 2, wherein the polysilazane is
a perhydropolysilazane of formula 2


4. The coating as claimed in claim 1, wherein the polysilazane is of
the formula (3)

where R', R", R'", R*, R**, and R*** independently of one another are
hydrogen or an unsubstituted or substituted alkyl, aryl, vinyl or
(trialkoxysilyl) alkyl radical, n and p being integers and n being such that
the polysilazane has a number-average molecular weight of 150 to
150000/mol.
5. The coating as claimed in claim 4, wherein
-R', R'", and R*** are hydrogen and R", R*, and R** are methyl;
-R', R'", and R*** are hydrogen, R" and R* are methyl, and R** is vinyl;
or
- R', R"', R*, and R*** are hydrogen and R" and R** are methyl.
6. The coating as claimed in claim 1, wherein the polysilazane is of
the formula (4)

where R', R", R"', R*, R**, R***, R1, R2, and R3 independently of one
another are hydrogen or an unsubstituted or substituted alkyl, aryl,
vinyl or (trialkoxysilyl)alkyl radical, n, p and q being integers and n being
such that the polysilazane has a number-average molecular weight of
150 to 150000 g/mol.
7. The coating as claimed in claim 6, wherein R', R"', and R*** are
hydrogen, R", R*, R**, and R2 are methyl, R3 is (triethoxysilyl)propyl, and
R1 is alkyl or hydrogen.

8. The coating as claimed in at least one of the preceding claims,
wherein the perhydropolysilazane solution contains 0.001 to 10% by
weight of a catalyst.
9. The coating as claimed in claim 9, wherein catalysts used are
organic amines, acids, metals, metal salts, or mixtures of these
compounds.
10. The coating as claimed in at least one of the preceding claims,
wherein solvents used are anhydrous organic solvents containing no
reactive groups.
11. A process for continuously coating metal strips according to the
coil coating process, wherein a solution comprising a polysilazane or a
mixture of polysilazanes of the formula (1)

where R', R" and R'" are identical or different and independently of one
another are hydrogen or an unsubstituted or substituted alkyl, aryl, or
(trialkoxysilyl)alkyl radical, n being an integer and being such that the
polysilazane has a number-average molecular weight of 150 to 150000
g/mol, in a solvent and at least one catalyst is applied to a metal strip
and then the coating is cured at a temperature of 150 to 500°C or by
using IR or NIR radiation.
12. A metal or a metal strip coated with a coating as claimed in at least
one of claims 1 to 10.

13. The metal or metal strip as claimed in claim 12, wherein the metal
comprises alloys of aluminum, steel, galvanized steel, zinc, magnesium
or titanium.
14. The metal or metal strip as claimed in claim 12 and/or 13, wherein
prior to application of the coating the metal strip has been pretreated by
chromating, chromate-free pretreatment, anodizing or vapor deposition
with metal oxide films.



ABSTRACT


A coating for metals containing a polysilazane solution or a mixture of polysilazanes of
general formula (1)-(SiR'R"-NR")a-(1) wherein R',R", R'" are identical or different and
independently represent hydrogen or an optionally substituted alkyl-. Aryl-, vinyl or
(trialkoxysilyl) alkyl radical, wherein n is a whole number and n is dimensioned in wuch
a way that polysilazane has an average molecular weight or 150-150.000 g/mol, in a
solvent and at least one catalysts. The invention also relates to a method for the
production of the coating.

Documents:

01460-kolnp-2007-abstract.pdf

01460-kolnp-2007-claims 1 1.1.pdf

01460-kolnp-2007-claims.pdf

01460-kolnp-2007-correspondence others 1.1.pdf

01460-kolnp-2007-correspondence others 1.2.pdf

01460-kolnp-2007-correspondence others.pdf

01460-kolnp-2007-description complete.pdf

01460-kolnp-2007-form 1.pdf

01460-kolnp-2007-form 13.pdf

01460-kolnp-2007-form 2.pdf

01460-kolnp-2007-form 3.pdf

01460-kolnp-2007-form 5.pdf

01460-kolnp-2007-international exam report.pdf

01460-kolnp-2007-international publication.pdf

01460-kolnp-2007-international search report.pdf

01460-kolnp-2007-pct request.pdf

01460-kolnp-2007-priority document.pdf

1460-KOLNP-2007-(07-02-2012)-ABSTRACT.pdf

1460-KOLNP-2007-(07-02-2012)-AMANDED CLAIMS.pdf

1460-KOLNP-2007-(07-02-2012)-DESCRIPTION (COMPLETE).pdf

1460-KOLNP-2007-(07-02-2012)-EXAMINATION REPORT REPLY RECEIVED.pdf

1460-KOLNP-2007-(07-02-2012)-FORM-1.pdf

1460-KOLNP-2007-(07-02-2012)-FORM-2.pdf

1460-KOLNP-2007-(07-02-2012)-FORM-3.pdf

1460-KOLNP-2007-(07-02-2012)-FORM-5.pdf

1460-KOLNP-2007-(07-02-2012)-OTHERS.pdf

1460-KOLNP-2007-(07-02-2012)-PA.pdf

1460-KOLNP-2007-(07-02-2012)-PETITION UNDER RULE 137.pdf

1460-KOLNP-2007-(09-01-2013)-CORRESPONDENCE.pdf

1460-KOLNP-2007-(09-01-2013)-FORM-13.pdf

1460-KOLNP-2007-(09-01-2013)-OTHERS.pdf

1460-KOLNP-2007-(09-01-2013)-PA.pdf

1460-KOLNP-2007-(14-05-2012)-ASSIGNMENT.pdf

1460-KOLNP-2007-(14-05-2012)-CORRESPONDENCE.pdf

1460-KOLNP-2007-(14-05-2012)-FORM-1.pdf

1460-KOLNP-2007-(14-05-2012)-FORM-2.pdf

1460-KOLNP-2007-(14-05-2012)-FORM-3.pdf

1460-KOLNP-2007-(14-05-2012)-FORM-5.pdf

1460-KOLNP-2007-(14-05-2012)-FORM-6.pdf

1460-KOLNP-2007-(14-05-2012)-PA.pdf

1460-KOLNP-2007-ANNEXURE FORM 3.pdf

1460-KOLNP-2007-ASSIGNMENT.pdf

1460-KOLNP-2007-CANCELLED PAGES.pdf

1460-KOLNP-2007-CORRESPONDENCE.pdf

1460-KOLNP-2007-EXAMINATION REPORT.pdf

1460-KOLNP-2007-FORM 1.1.1.pdf

1460-KOLNP-2007-FORM 13.pdf

1460-KOLNP-2007-FORM 18.pdf

1460-KOLNP-2007-FORM 2.1.1.pdf

1460-KOLNP-2007-FORM 26.pdf

1460-KOLNP-2007-FORM 3.1.1.pdf

1460-KOLNP-2007-FORM 5.1.1.pdf

1460-KOLNP-2007-FORM 6-1.1.pdf

1460-KOLNP-2007-FORM 6.pdf

1460-KOLNP-2007-GRANTED-ABSTRACT.pdf

1460-KOLNP-2007-GRANTED-CLAIMS.pdf

1460-KOLNP-2007-GRANTED-DESCRIPTION (COMPLETE).pdf

1460-KOLNP-2007-GRANTED-FORM 1.pdf

1460-KOLNP-2007-GRANTED-FORM 2.pdf

1460-KOLNP-2007-GRANTED-FORM 3.pdf

1460-KOLNP-2007-GRANTED-FORM 5.pdf

1460-KOLNP-2007-GRANTED-SPECIFICATION-COMPLETE.pdf

1460-KOLNP-2007-INTERNATIONAL PUBLICATION.pdf

1460-KOLNP-2007-INTERNATIONAL SEARCH REPORT & OTHERS.pdf

1460-KOLNP-2007-OTHERS.pdf

1460-KOLNP-2007-PA.pdf

1460-KOLNP-2007-PETITION UNDER RULE 137.pdf

1460-KOLNP-2007-PETITION UNDER SECTION 8.pdf

1460-KOLNP-2007-PRIORITY DOCUMENT.pdf

1460-KOLNP-2007-REPLY TO EXAMINATION REPORT.pdf

1460-KOLNP-2007-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf


Patent Number 255716
Indian Patent Application Number 1460/KOLNP/2007
PG Journal Number 12/2013
Publication Date 22-Mar-2013
Grant Date 18-Mar-2013
Date of Filing 24-Apr-2007
Name of Patentee AZ ELECTRONIC MATERIALS (LUXEMBOURG) S.A.R.L.
Applicant Address 32-36 Boulevard d' Avranches L-1160 Luxembourg
Inventors:
# Inventor's Name Inventor's Address
1 DR. STEFAN BRAND BAHNHOFSTRASSE 28 69493 HIRSCHBERG-LEUTERSHAUSEN
2 HUBERT LIEBE ODENWALDBLICK 52 65207 WIESBADEN
3 DR. ANDREAS WACKER KARL-LUDWIG-STRASSE 14 68165 MANNHEIM
4 DR. ANDREAS DIERDORF USINGER STRASSE 16 F 65719 HOFHEIM
PCT International Classification Number C09D 183/16
PCT International Application Number PCT/EP2005/011426
PCT International Filing date 2005-10-25
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10 2004 054 661.4 2004-11-12 Germany