US4338269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming an abrasion-resistant coating on molded articles
Assignee: Panelgraphic Corp
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Filing: 1980-12-05
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Granted: 1982-07-06
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Expires: 2000-12-05
Abstract
Abstract The present invention provides a method of forming a coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprised of a material having less bonding affinity for the abrasion-resistant coating than for the cured molding composition. The method comprises: (a) applying to a mold a coating composition comprising a pentaerythritol based polyacrylate or polmethacrylate and, a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer; (b) exposing said coating composition to actinic radiation to form a cured coating; (c) adding to the mold a heat polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating bonding to the surface of said molded article.
Inventors
- 👤 Raymond J. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:59
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/12; C; C08; C08J; C08J5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A method of forming an abrasion-resistant coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprising: (a) applying to said mold a coating composition curable by actinic radiation comprising a pentaerythritol-based polyacrylate or polymethacrylate and a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer; (b) exposing said coating composition to actinic radiation to form a cured coating on said mold; (c) adding to the mold a heat polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating transferring to the surface of said molded article.
Claim 2
Independent Claim
103 words
A method of forming an abrasion-resistant coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprising: (a) applying to said mold a coating composition curable by actinic radiation comprising a pentaerythritol-based polyacrylate or polymethacrylate and a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer; (b) exposing said coating composition to actinic radiation to form a cured coating on said mold; (c) adding to the mold a heat polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating transferring to the surface of said molded article.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said pentaerythritol-based polyacrylate is pentaerythritol tetraacrylate.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said cellulose ester is cellulose acetate butyrate.
Claim 5
Dependent Claim
50 words
The method of claim 1 wherein said vinyl chloride-vinyl acetate containing copolymer is a partially hydrolyzed vinyl chloride-vinyl acetate copolymer containing from about 50% to 95% combined vinyl chloride monomer, from about 2% to about 35% combined vinyl acetate monomer and from about 3% to about 25% combined vinyl alcohol.
Claim 6
Dependent Claim
27 words
The method of claim 4 wherein said partially hydrolyzed vinyl chloride-vinyl acetate copolymer contains 91% combined vinyl chloride, 3% combined vinyl acetate and 6% combined vinyl alcohol.
Claim 7
Dependent Claim
10 words
The method of claim 1 which further comprises a photoinitiator.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein said photoinitiator is alphachloro acetyl diphenyloxide.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said coating composition is applied to said mold by spraying.
Claim 10
Independent Claim
131 words
A method of forming a coating on a molded polymeric article formed by curing a polymerizable monomer-containing molding composition in a mold comprising: (a) applying to said mold a coating composition curable by actinic radiation comprising pentaerythritol tetraacrylate, cellulose acetate butyrate or a partially hydrolyzed vinyl chloride-vinyl acetate copolymer containing from about 50% to 95% combined vinyl chloride monomer, from about 2% to about 35% combined vinyl acetate monomer and from about 3% to about 25% combined vinyl alcohol and a photoinitiator; (b) exposing said coating to actinic radiation to form a cured coating on said mold; (c) adding to the mold a polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating bonding to the surface of said molded article.
Claim 11
Independent Claim
131 words
A method of forming a coating on a molded polymeric article formed by curing a polymerizable monomer-containing molding composition in a mold comprising: (a) applying to said mold a coating composition curable by actinic radiation comprising pentaerythritol tetraacrylate, cellulose acetate butyrate or a partially hydrolyzed vinyl chloride-vinyl acetate copolymer containing from about 50% to 95% combined vinyl chloride monomer, from about 2% to about 35% combined vinyl acetate monomer and from about 3% to about 25% combined vinyl alcohol and a photoinitiator; (b) exposing said coating to actinic radiation to form a cured coating on said mold; (c) adding to the mold a polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating bonding to the surface of said molded article.
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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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |