US4367311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding material
Assignee: BASF SE
•
Filing: 1982-01-11
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Granted: 1983-01-04
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Expires: 2002-01-11
Abstract
Abstract The use of alkyl acrylate in the preparation of the soft component of impact-resistant polystyrene based on polystyrene-grafted butadiene mixed with polyphenylene ether reduces the dust attraction of moldings prepared from this type of mixture.
Inventors
- 👤 Franz Brandstetter
- 👤 Graham E. McKee
- 👤 Edmund Priebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
C; C08; C08L; C08L25/00; C08L51/00; C08L51/04; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A thermoplastic molding material based on a mixture of (a) a styrene polymer, of intrinsic viscosity from 40 to 140 ml/g, as the hard component, (b) a cross-linked rubber grafted to the extent of 10 to 60% by weight with styrene, the rubber, in turn, comprising, as polymerized units, from 30 to 80% by weight of an alkyl acrylate, alkyl being of 2 to 8 carbon atoms, and from 20 to 70% by weight of butadiene, and (c) a polyphenylene ether having on average not less than 50 benzene units in the chain, wherein the weight ratio of a:b is (95-40):(5-60) and the weight ratio of (a+b):c is (5-90):(95-10).
Claim 2
Dependent Claim
109 words
A thermoplastic molding material based on a mixture of (a) a styrene polymer, of intrinsic viscosity from 40 to 140 ml/g, as the hard component, (b) a cross-linked rubber grafted to the extent of 10 to 60% by weight with styrene, the rubber, in turn, comprising, as polymerized units, from 30 to 80% by weight of an alkyl acrylate, alkyl being of 2 to 8 carbon atoms, and from 20 to 70% by weight of butadiene, and (c) a polyphenylene ether having on average not less than 50 benzene units in the chain, wherein the weight ratio of a:b is (95-40):(5-60) and the weight ratio of (a+b):c is (5-90):(95-10).
Claim 3
Dependent Claim
33 words
The molding material of claim 1 wherein the cross-linked rubber contains, as polymerized units, from 3 to 10% by weight of a vinyl alkyl ether, alkyl being of 1 to 8 carbon atoms.
References Cited (Backward Citations)
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Cited
US3792123A
Cited
US4128602A
Cited
US4128602B1
Cited
US3787532A
Cited
US4128603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |