US4304815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous release coating compositions and substrates coated therewith
Assignee: Congoleum Corp
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Filing: 1980-02-20
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Granted: 1981-12-08
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Expires: 2000-02-20
Abstract
Abstract Aqueous release coating compositions for application to substrates having low absorption thereinto, excellent adhesion thereto, and easy and quick release and removal therefrom comprising: from about 3% to about 8% of polyvinyl alcohol; from about 9% to about 35% clay; from about 5% to about 12% of an adhesive binder; and from about 49% to about 75% of water. All percentages being by weight, based on the total weight of the aqueous release coating composition. The resulting release-coated substrates are also included in the inventive concept.
Inventors
- 👤 Peter J. Cugasi, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:42
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; C; C09; C09D; C09D129/00; C09D129/02; C09D129/04; B29C33/68; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/25; Y10T428/259; Y10T428/28; Y10T428/2839; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A release composition-coated material capable of having other materials applied and adhered thereto and of having said other materials subsequently easily and quickly released and removed therefrom comprising: a substrate in sheet material form: and a release coating composition on said substrate comprising from about 3 parts to about 8 parts of polyvinyl alcohol: from about 9 parts to about 35 parts of clay: having a particle size of from 0.25 to about 4 microns and from about 5 parts to about 12 parts of an adhesive binder, all parts being by weight: and a layer of polyvinyl chloride sheet material adhered to said substrate by said release coating composition but being subsequently easily and quickly released and removed therefrom.
Claim 2
Dependent Claim
120 words
A release composition-coated material capable of having other materials applied and adhered thereto and of having said other materials subsequently easily and quickly released and removed therefrom comprising: a substrate in sheet material form: and a release coating composition on said substrate comprising from about 3 parts to about 8 parts of polyvinyl alcohol: from about 9 parts to about 35 parts of clay: having a particle size of from 0.25 to about 4 microns and from about 5 parts to about 12 parts of an adhesive binder, all parts being by weight: and a layer of polyvinyl chloride sheet material adhered to said substrate by said release coating composition but being subsequently easily and quickly released and removed therefrom.
Claim 3
Dependent Claim
17 words
A release composition-coated material as defined in claim 1, wherein said substrate is an asbestos fiber felt.
Claim 4
Dependent Claim
15 words
A release composition-coated material as defined in claim 1, wherein said substrate is kraft paper.
Claim 5
Dependent Claim
22 words
A release composition-coated material as defined in claim 1, wherein said polyvinyl alcohol has a percent hydrolysis of at least about 85.5%.
Claim 6
Dependent Claim
18 words
A release composition-coated material as defined in claim 1, wherein said adhesive binder is a polyvinyl acetate homopolymer.
Claim 7
Dependent Claim
19 words
A release composition-coated material as defined in claim 1, wherein said adhesive binder is a polyvinyl chloride-polyvinyl acetate copolymer.
Claim 8
Dependent Claim
30 words
A release composition-coated material as defined in claim 1, wherein said release coating composition also comprises from about 0.19% to about 0.26% by weight of a self-reactive self-cross-linking acrylic polymer.
References Cited (Backward Citations)
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US3281267A
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US3714086A
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US3664912A
Cited
US3634349A
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US3931088A
Cited
US3931088B1
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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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |