US4076661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesives based on aqueous dispersions of butadiene copolymers, polyvinylpyrrolidones and anionic macromolecular compounds
Assignee: Henkel AG and Co KGaA
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Filing: 1976-06-29
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Granted: 1978-02-28
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Expires: 1996-06-29
Abstract
Abstract An adhesive comprising an aqueous dispersion of butadiene copolymers, polyvinylpyrrolidones and water-soluble macromolecular compounds containing carboxyl groups, having improved adhesive strength and stability to hot water, said adhesive being particularly useful to bond metals to absorbent substrates.
Inventors
- 👤 Karl-Heinz Kassner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:32
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B27/04; B32B15/00; B32B15/04; B32B15/12; C; C09; C09J; C09J109/00; C09J109/10; C09J113/00; C09J113/02; B32B2311/00; B32B2317/00; B32B2317/12; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
An adhesive consisting essentially of an aqueous dispersion containing from 20% to 50% by weight of adhesive solids consisting of a mixed polymerizate of butadiene with monomers selected from the group consisting of styrene and acrylonitrile, containing from 0.5% to 3% by weight of the mixed polymerizate of carboxyl groups derived from monomers polymerizable with butadiene, having a further content, based on said mixed polymerizate of a. from 1% to 3% by weight of a vinylpyrrolidone compound having a K value of between 30 and 90 selected from the group consisting of polyvinylpyrrolidone and water-soluble copolymers of vinylpyrrolidone, and b. from 0.1% to 0.5% by weight of at least one carboxyl-group-containing, water-soluble, macromolecular compound and its water-soluble salts.
Claim 2
Dependent Claim
118 words
An adhesive consisting essentially of an aqueous dispersion containing from 20% to 50% by weight of adhesive solids consisting of a mixed polymerizate of butadiene with monomers selected from the group consisting of styrene and acrylonitrile, containing from 0.5% to 3% by weight of the mixed polymerizate of carboxyl groups derived from monomers polymerizable with butadiene, having a further content, based on said mixed polymerizate of a. from 1% to 3% by weight of a vinylpyrrolidone compound having a K value of between 30 and 90 selected from the group consisting of polyvinylpyrrolidone and water-soluble copolymers of vinylpyrrolidone, and b. from 0.1% to 0.5% by weight of at least one carboxyl-group-containing, water-soluble, macromolecular compound and its water-soluble salts.
Claim 3
Dependent Claim
18 words
The adhesive of claim 1 wherein said vinylpyrrolidone compound has a K value of between 80 and 90.
Claim 4
Dependent Claim
39 words
The adhesive of claim 1 wherein said carboxyl-group-containing, water-soluble, macromolecular compound is a water-soluble carboxymethyl cellulose having a Brookfield viscosity of from 6,000 to 25,000 cP at 25° C in a two percent aqueous solution and its water-soluble salts.
Claim 5
Dependent Claim
19 words
The adhesive of claim 1 wherein said dispersion contains from 25% to 35% by weight of said adhesive solids.
Claim 6
Dependent Claim
20 words
The adhesive of claim 1 wherein said vinylpyrrolidone compound is polyvinylpyrrolidone having a K value of between 80 and 90.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |