Patent US4350651A successfully refreshed from Google Patents.
US4480072A
Expired / Lapsed
US
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Use of ethyl silicate as a crosslinker for hydroxylated polymers
Assignee: Union Carbide Corp
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Filing: 1983-08-30
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Granted: 1984-10-30
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Expires: 2003-08-30
Abstract
Abstract The solvent resistance, flexibility and hardness of various hydroxylated polymers is enhanced by crosslinking with alkyl silicates or their hydrolyzed condensates.
Inventors
- 👤 Charles B. Mallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:45
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/23424; C; C08; C08F; C08F8/00; C08F8/42; C08G; C08G85/00; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; H04N21/2343; H04N21/80; H04N21/85; H04N21/854; H04N21/8547
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
Method of enhancing the solvent resistance, flexibility and hardness of hydroxylated polymers selected from the group consisting of hydrolized vinyl chloride/vinyl acetate copolymers, vinyl chloride/vinyl acetate/hydroxyalkyl acrylate copolymers, thermoplastic polyhydroxyethers derived from bisphenol A and epichlorohydrin, hydroxyalkyl acrylic or methacrylic acid polymers and polyester polyol polymers derived from organic carboxylic acids and polyhydric alcohols, which comprises blending said hydroxylated polymers with an alkyl silicate or alkyl silicate hydrolyzate in the presence of a trace amount of acid and thereafter curing the resultant mixture.
Claim 2
Dependent Claim
83 words
Method of enhancing the solvent resistance, flexibility and hardness of hydroxylated polymers selected from the group consisting of hydrolized vinyl chloride/vinyl acetate copolymers, vinyl chloride/vinyl acetate/hydroxyalkyl acrylate copolymers, thermoplastic polyhydroxyethers derived from bisphenol A and epichlorohydrin, hydroxyalkyl acrylic or methacrylic acid polymers and polyester polyol polymers derived from organic carboxylic acids and polyhydric alcohols, which comprises blending said hydroxylated polymers with an alkyl silicate or alkyl silicate hydrolyzate in the presence of a trace amount of acid and thereafter curing the resultant mixture.
Claim 3
Dependent Claim
12 words
Method claim in claim 1 wherein the alkyl silicate is tetraethyl orthosilicate.
Claim 4
Dependent Claim
15 words
Method claim in claim 1 wherein the hydroxylated polymer is an hydrolyzed vinyl chloride/vinyl acetate.
Claim 5
Dependent Claim
16 words
Method claim in claim 1 wherein the hydroxylated polymer is a vinyl chloride/vinyl acetate/hydroxyalkyl acrylate terpolymer.
Claim 6
Dependent Claim
19 words
Method claimed in claim 1 wherein the hydroxylated polymer is a thermoplastic polyhydroxyether derived from bisphenol A and epichlorohydrin.
Claim 7
Dependent Claim
26 words
Method claimed in claim 1 wherein the hydroxylated polymer is an hydroxyalkyl acrylic or methacrylic acid polymer having 2 to 4 carbons in the alkyl group.
Claim 8
Dependent Claim
22 words
Method claimed in claim 1 wherein the hydroxylated polymer is a polyester polyol polymer derived from organic carboxylic acids and polyhydric alcohols.
Claim 9
Dependent Claim
24 words
Method claimed in claim 1 wherein the ratio of hydroxylated polymer to alkyl silicate is in the range of about 25:1 to about 1:1.
Claim 10
Dependent Claim
20 words
Method claimed in claim 1 wherein the alkyl silicate is ethyl silicate hydrolyzed to a degree of about 40 percent.
Claim 11
Dependent Claim
20 words
Method claimed in claim 1 wherein the alkyl silicate is ethyl silicate hydrolyzed to a degree of about 80 percent.
References Cited (Backward Citations)
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |