Patent US4994807A successfully refreshed from Google Patents.
US5352735A
Expired / Lapsed
US
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Polymer blends
Assignee: EIDP Inc
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Filing: 1993-08-19
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Granted: 1994-10-04
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Expires: 2013-08-19
Abstract
Abstract Halide polymer such as polyvinylchloride and polyamide are melt blendable when the melt blending is carried out at a temperature of no greater than about 220° C. and the polyamide has a processing temperature no greater than the temperature of melt blending and the melt blend also incorporates a carboxyl and/or CO-functional ethylene polymer which compatibilizes the PVC and polyamide one with the other.
Inventors
- 👤 George H. Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:13
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/08; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L77/00; C08L73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A composition comprising: a) 40-60 weight parts polyvinyl chloride or polyvinylidene chloride; b) 40-60 weight parts polyamide; c) 1-20 weight parts copolymer comprising: i. 50-70 weight parts ethylene units; ii. 24-40 weight parts C 1 -C 4 alkyl acrylate C 1 -C 4 alkyl methacrylate, vinyl acetate, arcylic acid or methacrylic acid units; iii. 5-15 weight parts carbon monoxide unites; and iv. 0.1-5 weight parts anhydride graft units, whereby the weight parts of a),b) and c) total 100 and the weight parts of i.,ii,iii, and iv also total 100.
Claim 2
Dependent Claim
89 words
A composition comprising: a) 40-60 weight parts polyvinyl chloride or polyvinylidene chloride; b) 40-60 weight parts polyamide; c) 1-20 weight parts copolymer comprising: i. 50-70 weight parts ethylene units; ii. 24-40 weight parts C 1 -C 4 alkyl acrylate C 1 -C 4 alkyl methacrylate, vinyl acetate, arcylic acid or methacrylic acid units; iii. 5-15 weight parts carbon monoxide unites; and iv. 0.1-5 weight parts anhydride graft units, whereby the weight parts of a),b) and c) total 100 and the weight parts of i.,ii,iii, and iv also total 100.
References Cited (Backward Citations)
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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) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |