Patent US4332858A successfully refreshed from Google Patents.
US4332858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer laminate comprising a modified styrene-butadiene block copolymer
Assignee: Asahi Kasei Corp
•
Filing: 1979-12-26
•
Granted: 1982-06-01
•
Expires: 1999-12-26
Abstract
Abstract A multi-layer laminate comprising at least one A-B double layer structure, characterized in that said layer A is a layer comprising at least one material selected from the group consisting of olefin polymers, polyamide polymers, acrylate polymers, polyether polymers, polycarbonate polymers, polyurethane polymers, vinylidene chloride polymers, thermosetting resins, vulcanized rubbers, glass and papers and said layer B is a layer comprising mainly a modified block copolymer in which an unsaturated carboxylic acid or its derivative is grafted on a styrene-butadiene block copolymer. Said laminate is excellent in interlaminar adhesion, i.e. peeling strength.
Inventors
- 👤 Akira Saitoh
- 👤 Akio Yamori
- 👤 Toshio Ibaragi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31645; Y10T428/31725; Y10T428/3175; Y10T428/31826; Y10T428/31833; Y10T428/31837; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A multi-layer laminate comprising at least one A-B double layer structure, characterized in that said layer A is a layer comprising at least one material selected from the group consisting of olefin polymers, polyamide polymers, acrylate polymers, polyether polymers, polycarbonate polymers, polyurethane polymers, vinylidene chloride polymers, thermosetting resins, vulcanized rubbers, glass and papers and said layer B is a layer consisting essentially of a modified block copolymer in which an unsaturated dicarboxylic acid or its anhydride selected from the group consisting of maleic acid, fumaric acid and maleic anhydride is grafted on a styrene-butadiene block copolymer containing two or more polymer blocks composed mainly of styrene and one or more polymer blocks composed mainly of butadiene, the weight ratio of styrene to butadiene in said styrene-butadiene block copolymer being in the range of 20/80-85/15 and the content of said unsaturated dicarboxylic acid or its anhydride in the modified block copolymer being 0.05%-1% by weight.
Claim 2
Dependent Claim
154 words
A multi-layer laminate comprising at least one A-B double layer structure, characterized in that said layer A is a layer comprising at least one material selected from the group consisting of olefin polymers, polyamide polymers, acrylate polymers, polyether polymers, polycarbonate polymers, polyurethane polymers, vinylidene chloride polymers, thermosetting resins, vulcanized rubbers, glass and papers and said layer B is a layer consisting essentially of a modified block copolymer in which an unsaturated dicarboxylic acid or its anhydride selected from the group consisting of maleic acid, fumaric acid and maleic anhydride is grafted on a styrene-butadiene block copolymer containing two or more polymer blocks composed mainly of styrene and one or more polymer blocks composed mainly of butadiene, the weight ratio of styrene to butadiene in said styrene-butadiene block copolymer being in the range of 20/80-85/15 and the content of said unsaturated dicarboxylic acid or its anhydride in the modified block copolymer being 0.05%-1% by weight.
References Cited (Backward Citations)
FR2017894A1
Cited
GB1260897A
Cited
US3714295A
Cited
US3919035A
Cited
US3970771A
Cited
FR2375983B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |