US4923923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder compositions based on polyarylene sulphides
Assignee: Bayer AG
•
Filing: 1988-03-31
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Granted: 1990-05-08
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Expires: 2008-03-31
Abstract
Abstract The invention relates to powder compositions based on polyarylene sulphides, in particular polyphenylene sulphides (PPS) and thermoplastic vinyl polymers and to their use for the preparation of thermoplastic moulding compounds.
Inventors
- 👤 Klaus Struss
- 👤 Christian Lindner
- 👤 Karl-Erwin Piejko
- 👤 Hans-Jurgen Kress
- 👤 Dieter Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:04
CPC Classifications
C; C08; C08L; C08L69/00; C08J; C08J3/00; C08J3/005; C08L81/00; C08L81/02; C08L51/00; C08L55/00; C08L55/02; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
Process for the preparation of a powder composition of at least one thermoplastic polymer of vinyl monomers and a polyarylene sulphide wherein (a) a dispersion of a polyarylene sulphide is mixed with a dispersion of a thermoplastic polymer of vinyl monomers, (b) the resulting mixture is subjected to coagulation, and (c) the coagulate obtained is separated from the liquid phase and worked up into a powder.
Claim 2
Dependent Claim
66 words
Process for the preparation of a powder composition of at least one thermoplastic polymer of vinyl monomers and a polyarylene sulphide wherein (a) a dispersion of a polyarylene sulphide is mixed with a dispersion of a thermoplastic polymer of vinyl monomers, (b) the resulting mixture is subjected to coagulation, and (c) the coagulate obtained is separated from the liquid phase and worked up into a powder.
Claim 3
Dependent Claim
16 words
The process according to claim 1 wherein the dispersion of polyarylene sulfide is an aqueous dispersion.
Claim 4
Dependent Claim
20 words
The process according to claim 1 wherein the dispersion of a thermoplastic polymer of vinyl monomers is an aqueous dispersion.
Claim 5
Dependent Claim
22 words
The process according to claim 1 wherein the thermoplastic polymer is a graft polymer of styrene and acrylonitrile on a polybutadiene substrate.
Claim 6
Dependent Claim
13 words
The process according to claim 1 wherein the thermoplastic polymer is polymethyl methacrylate.
Claim 7
Dependent Claim
19 words
The process according to claim 1 wherein the thermoplastic polymer is a copolymer of acrylate rubber, styrene and acrylonitrile.
Claim 8
Dependent Claim
13 words
The process according to claim 1 wherein the polyarylene sulfide is substantially unbranched.
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |