US4711944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity resistant coating employing branched polymers of t-butyl acrylate
Assignee: Union Carbide Corp
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Filing: 1985-08-15
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Granted: 1987-12-08
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Expires: 2005-08-15
Abstract
Abstract Coating compositions containing polymers comprising t-butyl acrylate, polyfunctional acrylates, and comonomers containing an active crosslinking site exhibit increased humidity resistance.
Inventors
- 👤 Maynard A. Sherwin
- 👤 Joseph V. Koleske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:31
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; C08L; C08L61/00; C08L61/20; C08L63/00; Y; Y10; Y10S; Y10S526/00; Y10S526/939
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
A copolymer which has been produced by bulk polymerization, comprised of: (a) from about 10 to about 95 weight percent of t-butyl acrylate; (b) from about 0.1 to about 3 weight percent of a polyfunctional acrylate that is an ester of acrylic acid or methacrylic acid which possesses two or more ethylenically unsaturated double bonds; (c) from about 1 to about 30 weight percent of at least one ethylenically unsaturated functional comonomer which is copolymerizable with said t-butyl acrylate and said polyfunctional acrylate, said at least one ethylenically unsaturated functional comonomer containing at least one crosslinking site selected from the group consisting of carboxyl, hydroxyl, amide and mixtures thereof; (d) from 0 to about 80 weight percent of at least one other ethylenically unsaturated monomer which is capable of polymerizing with said t-butyl acrylate and polyfunctional acrylate.
Claim 2
Dependent Claim
137 words
A copolymer which has been produced by bulk polymerization, comprised of: (a) from about 10 to about 95 weight percent of t-butyl acrylate; (b) from about 0.1 to about 3 weight percent of a polyfunctional acrylate that is an ester of acrylic acid or methacrylic acid which possesses two or more ethylenically unsaturated double bonds; (c) from about 1 to about 30 weight percent of at least one ethylenically unsaturated functional comonomer which is copolymerizable with said t-butyl acrylate and said polyfunctional acrylate, said at least one ethylenically unsaturated functional comonomer containing at least one crosslinking site selected from the group consisting of carboxyl, hydroxyl, amide and mixtures thereof; (d) from 0 to about 80 weight percent of at least one other ethylenically unsaturated monomer which is capable of polymerizing with said t-butyl acrylate and polyfunctional acrylate.
Claim 3
Dependent Claim
22 words
The copolymer of claim 1 wherein t-butyl acrylate is present in an amount of from about 25 to about 75 weight percent.
Claim 4
Dependent Claim
22 words
The copolymer of claim 1 wherein t-butyl acrylate is present in an amount of from about 30 to about 60 weight percent.
Claim 5
Dependent Claim
23 words
The copolymer of claim 1 wherein the polyfunctional acrylate is present in an amount of from about 0.5 to about 2 weight percent.
Claim 6
Dependent Claim
13 words
The copolymer of claim 1 wherein the polyfunctional acrylate is trimethylol propane triacrylate.
Claim 7
Dependent Claim
23 words
The copolymer of claim 1 wherein the functional comonomer is present in an amount of from about 5 to about 20 weight percent.
Claim 8
Dependent Claim
27 words
The copolymer of claim 1 wherein the functional comonomer is one of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and mixtures thereof.
Claim 9
Dependent Claim
26 words
The copolymer of claim 1 wherein other ethylenically unsaturated monomers, component (d), are present in an amount of from about 5 to about 60 weight percent.
Claim 10
Dependent Claim
80 words
A copolymer comprised of: (a) from about 30 to about 60 weight percent t-butyl acrylate; (b) from about 0.5 to about 2 weight percent trimethylol propane triacrylate; (c) from about 5 to about 20 weight percent of one of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and mixtures thereof; and (d) from about 5 to about 60 weight percent of other ethylenically unsaturated monomers which are capable of polymerizing with t-butyl acrylate and polyfunctional acrylates.
Claim 11
Dependent Claim
80 words
A copolymer comprised of: (a) from about 30 to about 60 weight percent t-butyl acrylate; (b) from about 0.5 to about 2 weight percent trimethylol propane triacrylate; (c) from about 5 to about 20 weight percent of one of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and mixtures thereof; and (d) from about 5 to about 60 weight percent of other ethylenically unsaturated monomers which are capable of polymerizing with t-butyl acrylate and polyfunctional acrylates.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |