Patent US3708388A successfully refreshed from Google Patents.
US3708388A
Expired / Lapsed
US
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Process of laminating using vinyl acetate-ethylene copolymer latex adhesive composition
Assignee: Air Products and Chemicals Inc
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Filing: 1970-05-06
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Granted: 1973-01-02
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Expires: 1990-05-06
Abstract
Abstract Aqueous latices comprising vinyl acetate-ethylene copolymers are effective to laminate a film, web or other substrate to a second surface whereby the dried polymer film deposited by the latex unites the substrate to the second surface.
Inventors
- 👤 M Lindemann
- 👤 J Iacoviello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:52
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/30; B32B27/304; B32B7/00; B32B7/04; B32B7/12; C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J131/00; C09J131/02; C09J131/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31909; Y10T428/31928; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/387
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
15 words
The composition of claim 1 wherein the polyvinyl alcohol is acetylated up to 50 percent.
Claim 2
Dependent Claim
19 words
The composition of claim 1 wherein the ethylene content of the copOlymer is more than 15 percent by weight.
Claim 3
Dependent Claim
142 words
A process of uniting a substrate with an adjacent surface of a continuous web to form a laminate, which process comprises interposing between the substrate and web an adhesive composition consisting essentially of an aqueous vinyl acetate-ethylene copolymer emulsion having from about 5 to about 40 percent by weight ethylene, a solids content of from 45 to about 60 percent by weight and an intrinsic viscosity of from 1 to 2.5 dl/g, as measured in benzene at 30* C, the vinyl acetate and ethylene monomers copolymerized in the presence of a protective colloid in an amount from about 0.05 to about 2 percent by weight based upon the total weight of the emulsion and adhering the substrate and web to form a resulting laminate structure, said protective colloid being selected from the group consisting essentially of a polyvinyl alcohol and hydroxyethyl cellulose.
Claim 4
Dependent Claim
18 words
The process of claim 4 wherein the polyvinyl alcohol of the composition is acetylated up to 50 percent.
Claim 5
Dependent Claim
20 words
The process of claim 4 wherein the ethylene content of the copolymer emulsion is more than 15 percent by weight.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein the substrate and web of the laminate are polyvinyl chloride film and cloth, respectively.
Claim 7
Dependent Claim
120 words
A laminate comprising a substrate and an overlying continuous web bonded together by means of an adhesive composition, said composition consisting essentially of an aqueous vinyl acetate-ethylene copolymer emulsion having from about 5 to about 40 percent by weight ethylene, a solids content of from 45 to about 60 percent by weight and an intrinsic viscosity of from 1 to 2.5 dl/g, as measured in benzene at 30* C, the vinyl acetate and ethylene monomers copolymerized in the presence of a protective colloid in an amount from about 0.05 to about 2 percent by weight based upon the total weight of the emulsion, said protective colloid being selected from the group consisting essentially of a polyvinyl alcohol and hydroxyethyl cellulose.
Claim 8
Dependent Claim
19 words
The laminate of claim 8 wherein the polyvinyl alcohol of the adhesive composition is acetylated up to 50 percent.
Claim 9
Dependent Claim
20 words
The laminate of claim 8 wherein the ethylene content of the copolymer emulsion is more than 15 percent by weight.
Claim 10
Dependent Claim
20 words
The laminate of claim 8 wherein the substrate and web of the laminate are polyvinyl chloride film and cloth, respectively.
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |