US4436871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imide-san polymer-blends
Assignee: Rohm and Haas Co
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Filing: 1982-05-10
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Granted: 1984-03-13
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Expires: 2002-05-10
Abstract
Abstract Compositions comprising soluble or partly soluble blend of (A) polyglutarimide and (B) styrene-acrylonitrile copolymer, a multiple stage polymer having a styrene-acrylonitrile stage, or mixtures thereof.
Inventors
- 👤 William H. Staas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L33/00; C08L33/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
Composition comprising a soluble or partly soluble blend of (A) about 1 to 99 parts by weight polyglutarimide and (B) about 99 to 1 part by weight of (1) a single stage polymer consisting essentially of a styrene-acrylonitrile copolymer, or (2) a mixture of (1) with a multiple stage polymer having a final stage consisting essentially of a styrene-acrylonitrile copolymer.
Claim 2
Dependent Claim
60 words
Composition comprising a soluble or partly soluble blend of (A) about 1 to 99 parts by weight polyglutarimide and (B) about 99 to 1 part by weight of (1) a single stage polymer consisting essentially of a styrene-acrylonitrile copolymer, or (2) a mixture of (1) with a multiple stage polymer having a final stage consisting essentially of a styrene-acrylonitrile copolymer.
Claim 3
Dependent Claim
14 words
Composition of claim 1 comprising a soluble blend of polyglutarimide and a styrene-acrylonitrile copolymer.
Claim 4
Dependent Claim
31 words
Composition of claim 1 wherein the blend has a single Tg as measured by DSC between the individual Tg's of the glassy phase of the styrene-acrylonitrile copolymer and the polyglutarimide polymer.
Claim 5
Dependent Claim
15 words
Composition of claim 1 wherein the blend is optically clear over a range of temperatures.
Claim 6
Dependent Claim
11 words
Composition of claim 1 wherein said polyglutarimide is an N-methyl glutarimide.
Claim 7
Dependent Claim
23 words
Composition of claim 1 wherein said polyglutarimide is the product of urea or ammonia imidization of a methyl methacrylate-styrene copolymer in an extruder.
Claim 8
Dependent Claim
16 words
Composition of claim 1 wherein said multistage polymer is a styrene/acrylonitrile//butyl acrylate (ASA) core-shell impact modifier.
Claim 9
Dependent Claim
40 words
Composition of claim 1 wherein said blend is partly soluble and has two individual glassy phase glass transition temperatures, Tg, as measured by DSC which are displaced from the values displayed by the unblended components and which lie between them.
Claim 10
Dependent Claim
20 words
Composition of claim 1 wherein said styrene is selected from the group consisting of styrene, lower alkyl and/or halo-substituted styrenes.
Claim 11
Dependent Claim
12 words
Composition of claim 1 wherein said acrylonitrile component is replaced by methacrylonitrile.
Claim 12
Dependent Claim
9 words
Composition of claim 1 wherein said blend is transparent.
Claim 13
Dependent Claim
40 words
Composition consisting essentially of a soluble or partly soluble blend of (A) about 1 to 99 parts by weight polyglutarmide and (B) about 99 to 1 part by weight of a single stage polymer consisting essentially of a styrene-acrylonitrile copolymer.
Claim 14
Dependent Claim
40 words
Composition consisting essentially of a soluble or partly soluble blend of (A) about 1 to 99 parts by weight polyglutarmide and (B) about 99 to 1 part by weight of a single stage polymer consisting essentially of a styrene-acrylonitrile copolymer.
References Cited (Backward Citations)
US4254232A
Cited
US4217424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |