US5244959A
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US
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Coatings comprising an organosilane solution polymer and a crosslink functional dispersed polymer
Assignee: EIDP Inc
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Filing: 1990-12-17
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Granted: 1993-09-14
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Expires: 2010-12-17
Abstract
Abstract A coating composition containing a film-forming organosilane polymer and a sterically dispersed macromolecular polymer having macromonomer chains which react with the silane functionality of the organosilane polymer. The coating compositon can be used as the clearcoat over a conventional pigmented basecoat, or as a basecoat or monocoat or primer when a suitable amount of pigment is incorporated therein. The coating composition provides improved chemical resistance and is not prone to cracking.
Inventors
- 👤 Isidor Hazan
- 👤 Mitzie K. Rummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:52
CPC Classifications
C; C09; C09D; C09D143/00; C09D143/04; C08; C08L; C08L51/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
246 words
A composition useful for coating a substrate, which composition comprises: (a) from about 20 to 90% by weight, based on the weight of binder solids, of a film-forming alkoxysilane-functional polymer, having a weight average molecular weight of about 500-30,000, comprising from about 30 to 95% by weight, based on the weight of the alkoxysilane-functional polymer, of ethylenically unsaturated monomers which do not contain an alkoxy-silane functionality and about 5 to 70% by weight ethylenically unsaturated monomers which contain an alkoxysilane functionality; and (b) from about 10 to 60%, based on the weight of the binder solids, of a dispersed polymer having an average particle size of at least about 0.1 microns, comprising: (i) a macromolecular core; and (ii) a plurality of macromonomer chains, attached to the macromolecular core, having a weight average molecular weight of about 1,000 to 30,000, consisting essentially of 5 to 30% by weight, based on the weight of the macromonomer, of polymerized ethylenically unsaturated monomers which comprise a reactive crosslink functionality, the same or different, selected from the group consisting of an anhydride, isocyanate, silane, acid, hydroxy, amide, and combinations thereof, which functionality is capable of crosslinking with silane functionalities in said alkoxysilane-functional polymer; and about 70 to 95% by weight, based on the weight of the macromonomer, of at least one other polymerized ethylenically unsaturated monomer without a crosslink functionality; and (c) from about 25 to 50% by weight, based on the weight of the composition, of a liquid organic carrier.
Claim 2
Dependent Claim
246 words
A composition useful for coating a substrate, which composition comprises: (a) from about 20 to 90% by weight, based on the weight of binder solids, of a film-forming alkoxysilane-functional polymer, having a weight average molecular weight of about 500-30,000, comprising from about 30 to 95% by weight, based on the weight of the alkoxysilane-functional polymer, of ethylenically unsaturated monomers which do not contain an alkoxy-silane functionality and about 5 to 70% by weight ethylenically unsaturated monomers which contain an alkoxysilane functionality; and (b) from about 10 to 60%, based on the weight of the binder solids, of a dispersed polymer having an average particle size of at least about 0.1 microns, comprising: (i) a macromolecular core; and (ii) a plurality of macromonomer chains, attached to the macromolecular core, having a weight average molecular weight of about 1,000 to 30,000, consisting essentially of 5 to 30% by weight, based on the weight of the macromonomer, of polymerized ethylenically unsaturated monomers which comprise a reactive crosslink functionality, the same or different, selected from the group consisting of an anhydride, isocyanate, silane, acid, hydroxy, amide, and combinations thereof, which functionality is capable of crosslinking with silane functionalities in said alkoxysilane-functional polymer; and about 70 to 95% by weight, based on the weight of the macromonomer, of at least one other polymerized ethylenically unsaturated monomer without a crosslink functionality; and (c) from about 25 to 50% by weight, based on the weight of the composition, of a liquid organic carrier.
Claim 3
Dependent Claim
36 words
The composition of claim 1, wherein the macromolecular core is 50-90% by weight of the dispersed polymer, comprises monomers of alkyl acrylate or alkyl methacrylate, and has a weight average molecular weight of at least 50,000.
Claim 4
Dependent Claim
14 words
The composition of claim 1, wherein the crosslink functionality comprises a silane or hydroxy.
Claim 5
Dependent Claim
23 words
The coating composition of claim 1, wherein the ratio by weight of alkoxysilane-functional polymer to the dispersed polymer ranges from 5:1 to 1:1.
Claim 6
Dependent Claim
16 words
The coating composition of claim 1, wherein the alkoxysilane-functional polymer may also comprise hydroxy functional groups.
Claim 7
Dependent Claim
27 words
The coating composition of claim 1, further comprising a polyol polymer having a hydroxyl number of about 50-200 and a weight average molecular weight of about 1,000-200,000.
Claim 8
Dependent Claim
14 words
The coating composition of claim 6, wherein the polyol polymer comprises an acrylic polyol.
Claim 9
Dependent Claim
11 words
The coating composition of claim 7, further comprising a crosslinking agent.
Claim 10
Dependent Claim
15 words
The coating composition of claim 8, wherein the crosslinking agent is an alkylated melamine formaldehyde.
Claim 11
Dependent Claim
14 words
The coating composition of claim 1, wherein the alkoxysilane-functional polymer is an acrylosilane polymer.
Claim 12
Dependent Claim
100 words
The coating composition of claim 1, wherein the ethylenically unsaturated monomers containing a silane functionality have the following structural formula: ##STR4## wherein R is selected from the group consisting of CH 3 , CH 3 CH 2 , CH 3 O, and CH 3 CH 2 O; R 1 and R 2 are individually selected from the group consisting of CH 3 and CH 3 CH 2 ; and R 3 is selected from the group consisting of H, CH 3 , and CH 3 CH 2 and n is O or a positive integer of not greater than 8.
Claim 13
Dependent Claim
78 words
The coating composition of claim 1, wherein the ethylenically unsaturated monomers containing a alkoxysilane functionality having the following structural formula: ##STR5## wherein R is selected from the group consisting of CH 3 , CH 3 CH 2 , CH 3 O, and CH 3 CH 2 O; R 1 and R 2 are individually selected from the group consisting of CH 3 or CH 3 CH 2 ; and n is O and a positive integer of 1-10.
Claim 14
Dependent Claim
100 words
The coating composition of claim 1, wherein the ethylenically unsaturated monomers containing a alkoxysilane functionality have the following structural formula: ##STR6## wherein R is selected from the group consisting of CH 3 , CH 3 CH 2 , CH 3 O, and CH 3 CH 2 O; R 1 and R 2 are individually selected from the group consisting of CH 3 and CH 3 CH 2 ; and R 4 is selected from the group consisting of H and CH 3 , R 5 is an alkylene group having 1-5 carbon atoms and n is positive integer of 1-8.
Claim 15
Dependent Claim
38 words
The coating composition of claim 11, wherein the acrylosilane consists essentially of polymerized monomers of about 15-25% by weight styrene, about 25-50% by weight of an alkyl or cycloalkyl methacrylate, and about 30-60% by weight a trimethoxysilane-containing monomer.
Claim 16
Dependent Claim
81 words
The coating composition of claim 1, wherein (a) the core of the dispersed polymer comprises polymerized monomers of styrene, an alkyl methacrylate, and an ethylenically unsaturated monocarboxylic acid; and (b) the macromonomers attached to the core comprise polymerized alkyl methacrylate, alkyl acrylate monomers, or mixtures thereof, each having 1-12 carbon atoms in the alkyl group, hydroxy alkyl acrylate or hydroxy alkyl methacrylate monomers, or mixtures thereof, each having 1-4 carbon atoms in the alkyl group and glycidyl acrylate or glycidyl methacrylate.
Claim 17
Dependent Claim
66 words
The coating composition of claim 15, wherein (a) the core of the dispersed polymer comprise polymerized monomers of methacrylic acid, hydroxy ethyl acrylate, methyl methacrylate, methyl acrylate, glycidyl methacrylate, and styrene; and (b) the macromonomers attached to the core comprise polymerized prepolymer and glycidyl methacrylate; wherein the prepolymer consists essentially of polymerized monomers of styrene, butyl methacrylate, butyl acrylate, hydroxy ethylacrylate, acrylic acid, and ethyl methacrylate.
Claim 18
Dependent Claim
33 words
The coating composition of claim 1, wherein the composition contains about 0.1-5% by weight, based on the weight of the composition, of an organo tin catalyst, an aluminum catalyst or a zirconium catalyst.
Claim 19
Dependent Claim
62 words
A process for coating a substrate, comprising the steps of: (a) applying a layer of a pigmented basecoating to the substrate to form a basecoat thereon; (b) applying to the basecoat a layer of the composition of claim 1 to form a top coat over said basecoat; (c) curing the basecoat and topcoat to form a basecoat and topcoat on the substrate.
Claim 20
Dependent Claim
9 words
A substrate coated with a composition of claim 1.
Claim 21
Dependent Claim
33 words
The composition of claim 1, wherein the dispersed polymer comprises 50-90%, by weight of the dispersed polymer, of said macromolecular core, and 10-50%, by weight of the dispersed polymer, of said macromonomer chains.
Claim 22
Dependent Claim
32 words
The composition of claim 1, wherein the macromolecular core is not highly crosslinked and comprises polymerized monomers of an alkyl methacrylate or alkyl acrylate having 1-8 carbon atoms in the alkyl group.
Claim 23
Dependent Claim
21 words
The composition of claim 1, wherein the composition is a one-package system and comprises an effective amount of a water scavenger.
Claim 24
Dependent Claim
15 words
The composition of claim 22, wherein the water scavenger is trimethyl orthoformate or triethyl orthoformate.
Claim 25
Dependent Claim
12 words
The composition of claim 1, wherein the composition is an etch-resistant clearcoat.
Claim 26
Dependent Claim
15 words
The composition of claim 1, wherein the average particle size is 0.1 to 0.5 microns.
Claim 27
Dependent Claim
30 words
A substrate coated with a pigmented basecoat of a film forming polymer and a pigment, and a clearcoat comprising the composition of claim 1 in superimposed adherence to the basecoat.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |