Patent US4251591A successfully refreshed from Google Patents.
US4251591A
Expired / Lapsed
US
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Polyvinylbutyral laminates
Assignee: Solutia Inc
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Filing: 1979-10-01
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Granted: 1981-02-17
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Expires: 1999-10-01
Abstract
Abstract Laminates of a polyvinyl butyral sheet with a sheet comprising a copolymer of a vinylaromatic monomer with an unsaturated dicarboxylic acid anhydride have high strength and can be made optically clear. The laminates can be in part foamed to provide insulation materials or metalplated to provide tough materials that could be used for example in automotive applications.
Inventors
- 👤 Henry K. Chi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10165; B32B17/10174; B32B17/10366; B32B17/1055; B32B17/10743; B32B17/10761; B32B27/065; B32B2307/00; B32B2307/40; B32B2307/412; B32B2329/00; B32B2329/06; B32B2355/00; B32B2355/02; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249946; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/24999; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31645; Y10T428/31649; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31859; Y10T428/31909; Y10T428/31928; Y10T428/31931; Y10T428/31942; Y10T428/31949; Y10T428/31953
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
A laminate comprising: (A) at least one sheet comprising a copolymer formed by polymerizing from 55 to 97 parts by weight of a vinylaromatic monomer with from 45 to 3 parts by weight of an unsaturated dicarboxylic acid anhydride and from 0 to 20 parts by weight of copolymerizable monomer; laminated to (B) a sheet of polyvinylbutyral.
Claim 2
Dependent Claim
57 words
A laminate comprising: (A) at least one sheet comprising a copolymer formed by polymerizing from 55 to 97 parts by weight of a vinylaromatic monomer with from 45 to 3 parts by weight of an unsaturated dicarboxylic acid anhydride and from 0 to 20 parts by weight of copolymerizable monomer; laminated to (B) a sheet of polyvinylbutyral.
Claim 3
Dependent Claim
44 words
A laminate according to claim 1 in which the monomers of Component (A) are polymerized in the presence of a rubber having a glass transition temperature below 0° C. such that Component (A) comprises from 2 to 30 percent by weight of the rubber.
Claim 4
Dependent Claim
37 words
A laminate according to either of claims 1 and 2 in which Component (A) comprises from 5 to 15 percent by weight of a monomer selected from C 1 to C 3 alkyl methacrylates, acrylonitrile and methacrylonitrile.
Claim 5
Dependent Claim
13 words
A laminate according to any of claims 1 to 3 which is transparent.
Claim 6
Dependent Claim
16 words
A laminate according to any of claims 1 to 3 in which Component (A) is foamed.
Claim 7
Dependent Claim
21 words
A laminate according to any of claims 1 to 3 in which Component (B) is laminated between sheets of Component (A).
Claim 8
Dependent Claim
27 words
A laminate according to any of claims 1 to 3 in which the exposed surface of the Component A sheet is provided with an abrasion resistant coating.
Claim 9
Dependent Claim
28 words
A laminate according to any of claims 1 to 3 which comprises, in laminated sequence, layers of Component (B), Component (A) and a copolymer of styrene and acrylonitrile.
Claim 10
Dependent Claim
42 words
A laminate according to any of claims 1 to 3 in which Component (A) comprises up to 70 percent by weight of a copolymer of styrene and acrylonitrile polyblended with the copolymer of the vinylaromatic monomer and the unsaturated dicarboxylic acid anhydride.
Claim 11
Dependent Claim
23 words
A laminate according to any of claims 1 to 3 in which Component (A) comprises up to 70 percent by weight of ABS.
Claim 12
Dependent Claim
20 words
A laminate according to any of claims 1 to 3 in which Component (A) is laminated to an ABS Sheet.
Claim 13
Dependent Claim
21 words
A laminate according to any of claims 1 to 3 in which Component (A) is laminated to a metal-plated ABS sheet.
Claim 14
Dependent Claim
18 words
A laminate according to any of claims 1 to 3 in which Component (A) comprises glass fiber reinforcement.
Claim 15
Dependent Claim
34 words
A laminate according to any of claims 1 to 3 in which the polyvinyl butyral sheet is also laminated to a sheet selected from the group consisting of polymethylmethacrylate, polycarbonates, polyamides and polyethylene terephthalate.
Claim 16
Dependent Claim
22 words
A laminate according to any of claims 1 to 3 which comprises two or more sheets of Component (A) of different compositions.
Claim 17
Dependent Claim
15 words
A multilayer laminate structure comprising a sub-laminate according to any of claims 1 to 3.
References Cited (Backward Citations)
US2430931A
Cited
US2955054A
Cited
US2991199A
Cited
US3030229A
Cited
US3471356A
Cited
US3421928A
Cited
US3488714A
Cited
GB1218321A
Cited
US3650803A
Cited
GB1354907A
Cited
US4188440A
Cited
US4027061A
Cited
US4115622A
Cited
US4126601A
Cited
US4164602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |