US4740552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloys of styrenic resins and polyamides
Assignee: GE Chemicals Inc
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Filing: 1986-02-14
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Granted: 1988-04-26
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Expires: 2006-02-14
Abstract
Abstract An improved method for making alloys of styrenic resins and polyamides. The styrenic resin is first melt-processed with an ethylenically-unsaturated carboxylic compound, optionally in the presence of a free-radical generator, then combined with the polyamide under melt-processing conditions. The compositions remain thermally-processable and generally exhibit good impact properties with little or no delamination.
Inventors
- 👤 Thomas S. Grant
- 👤 David V. Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:48
CPC Classifications
C; C08; C08L; C08L77/00; C08F; C08F279/00; C08F279/02; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
A composition comprising from 5-95 wt% of a polyamide and correspondingly from 95-5 wt% of a carboxylated styrene polymer resin, said carboxylated styrene polymer resin being the product of melt-processing a mixture comprising 100 parts by weight of a graft polymer comprising styrene, acrylonitrile and butadiene and from 0.05 to 5 parts by weight of an ethylenically-unsaturated carboxylic compound selected from the group consisting of maleic ahydride, maleic acid, glutonic anhydride, itaconic acid, citraconic anhydride, maleimide, N-phenyl maleimide and mixtures thereof.
Claim 2
Dependent Claim
81 words
A composition comprising from 5-95 wt% of a polyamide and correspondingly from 95-5 wt% of a carboxylated styrene polymer resin, said carboxylated styrene polymer resin being the product of melt-processing a mixture comprising 100 parts by weight of a graft polymer comprising styrene, acrylonitrile and butadiene and from 0.05 to 5 parts by weight of an ethylenically-unsaturated carboxylic compound selected from the group consisting of maleic ahydride, maleic acid, glutonic anhydride, itaconic acid, citraconic anhydride, maleimide, N-phenyl maleimide and mixtures thereof.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said mixture further comprises a free-radical generator.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said styrene polymer resin is an acrylonitrile-butadiene-styrene resin.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said ethylenically-unsaturated carboxylic compound is selected from the group consisting of maleic anhydride, maleimide and N-phenyl maleimide.
Claim 6
Dependent Claim
34 words
The composition of claim 1 wherein said carboxylated styrene polymer resin is the product of melt-processing a mixture comprising 100 pbw of an acrylonitrile-butiene-styrene resin and from 0.05 to 2.0 pbw of maleic anhydride.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein said mixture further comprises a free-radical compound.
Claim 8
Independent Claim
93 words
A method for preparing a blend comprising a polyamide and a graft polymer comprising styrene, acrylonitrile and butadiene comprising the steps of: (a) providing a mixture comprising 100 pbw of a graft polymer comprising styrene, acrylonitrile and butadiene and from 0.05 to 5 pbw of an ethylenically-unsaturated carboxylic compound selected from the group consisting of maleic anhydride, maleic acid, glutonic anhydride, itaconic acid, citraconic anhydride, maleimide, N-phenyl maleimide and mixtures thereof; (b) melt-mixing said mixture at a temperature in the range of 450°-650° F.; and (c) thereafter melt-mixing said mixture with a polyamide.
Claim 9
Independent Claim
93 words
A method for preparing a blend comprising a polyamide and a graft polymer comprising styrene, acrylonitrile and butadiene comprising the steps of: (a) providing a mixture comprising 100 pbw of a graft polymer comprising styrene, acrylonitrile and butadiene and from 0.05 to 5 pbw of an ethylenically-unsaturated carboxylic compound selected from the group consisting of maleic anhydride, maleic acid, glutonic anhydride, itaconic acid, citraconic anhydride, maleimide, N-phenyl maleimide and mixtures thereof; (b) melt-mixing said mixture at a temperature in the range of 450°-650° F.; and (c) thereafter melt-mixing said mixture with a polyamide.
Claim 10
Dependent Claim
14 words
The method of claim 7 wherein said mixture further comprises a free radical generator.
Claim 11
Dependent Claim
13 words
The method of claim 7 wherein said graft polymer resin is an acrylonitrile-butadiene-styrene.
Claim 12
Dependent Claim
22 words
The method of claim 7 wherein said ethylenically-unsaturated compound is selected from the group consisting of maleic anhydride, maleimide and N-phenyl maleimide.
Claim 13
Dependent Claim
12 words
The method of claim 7 wherein said ethylenically-unsaturated compound is maleic anhydride.
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |