US4885209A
Expired / Lapsed
US
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Thermoplastic silicon rubber graft polymers (II)
Assignee: Bayer AG
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Filing: 1988-06-08
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Granted: 1989-12-05
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Expires: 2008-06-08
Abstract
Abstract The invention relates to thermoplastic particulate graft polymers of a rubber (AB), consisting of a core (A) of rubber-like polymer of olefinically unsaturated monomers having softening temperatures (glass temperatures) below 0° C. and a shell (B) of organopolysiloxane, and a polymer (C) of at least one ethylenically unsaturated monomer grafted into the rubber (AB) and to their use, optionally in admixture with brittle thermoplastic vinyl resins, as thermoplastic molding compositions.
Inventors
- 👤 Christian Lindner
- 👤 Herbert Eichenauer
- 👤 Dieter Wittmann
- 👤 Volker Damrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
C; C08; C08F; C08F285/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31536
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
Thermoplastic particulate graft polymers of a substrate rubber (AB), consisting of a core (A) of rubber polymer of olefinically unsaturated monomers having softening temperatures below 0° C. and a shell (B) of organopolysiloxane, and a superstrate polymer (C) of at least one ethylenically unsaturated monomer graft polymerized onto the rubber substrate (AB).
Claim 2
Dependent Claim
52 words
Thermoplastic particulate graft polymers of a substrate rubber (AB), consisting of a core (A) of rubber polymer of olefinically unsaturated monomers having softening temperatures below 0° C. and a shell (B) of organopolysiloxane, and a superstrate polymer (C) of at least one ethylenically unsaturated monomer graft polymerized onto the rubber substrate (AB).
Claim 3
Dependent Claim
21 words
Thermoplastic graft polymers according to claim 1 wherein the weight ratio of core A to shell B is 0.1:99.1 to 90:10.
Claim 4
Dependent Claim
21 words
Thermoplastic graft polymers according to claim 1 wherein the superstrate is 20 to 90 % by weight of the graft copolymer
Claim 5
Dependent Claim
13 words
Thermoplastic graft polymers according to claim 1 wherein (A) is an alkylacrylate rubber.
Claim 6
Dependent Claim
21 words
Thermoplastic graft polymers according to claim 1 wherein (c) is a homopolymer or copolymer of ethylene, propylene, butylene, styrene and/or acrylonitrile.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |