Patent US4647594A successfully refreshed from Google Patents.
US4647594A
Expired / Lapsed
US
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Polyphenylene ether compositions having improved impact and ESCR
Assignee: General Electric Co
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Filing: 1985-10-10
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Granted: 1987-03-03
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Expires: 2005-10-10
Abstract
Abstract The properties of polymer mixtures which comprise a polyphenylene ether and a polyvinyl aromatic compound can be improved by the simultaneous addition of an organic metal sulphonate compound and a block copolymer. In particular a combination of a good impact strength and a good resistance against agressive media under mechanical stresses (environmental stress) cracking resistance "ESCR") is obtained. This also applies to polymer mixtures having a high content of titanium dioxide.
Inventors
- 👤 Johannes W. J. DE Munck
- 👤 Johannes H. G. M. Lohmeijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:19
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A polymer mixture having improved impact strength and environmental stress crack resistance comprising a mixture of: (A) a polyphenylene ether; (B) a polyvinyl aromatic compound; (C) a sulphonate of the formula (R-SO 3 ) n X, wherein R is an alkyl radical or aralkyl radical having 5 to 25 carbon atoms, X is an alkali metal ion or an alkaline earth metal ion, and n=1 or 2; and (D) a block copolymer of the A-B, A-B-A, or A m B, wherein A is a block derived from a vinyl aromatic compound and B is a block derived from a conjugated diene compound, and m=2 or 3 and wherein said sulphonate (C) and said block copolymer (D) are present in amounts effective for improving the impact strength and environmental stress crack resistance of said polymer mixture.
Claim 2
Dependent Claim
135 words
A polymer mixture having improved impact strength and environmental stress crack resistance comprising a mixture of: (A) a polyphenylene ether; (B) a polyvinyl aromatic compound; (C) a sulphonate of the formula (R-SO 3 ) n X, wherein R is an alkyl radical or aralkyl radical having 5 to 25 carbon atoms, X is an alkali metal ion or an alkaline earth metal ion, and n=1 or 2; and (D) a block copolymer of the A-B, A-B-A, or A m B, wherein A is a block derived from a vinyl aromatic compound and B is a block derived from a conjugated diene compound, and m=2 or 3 and wherein said sulphonate (C) and said block copolymer (D) are present in amounts effective for improving the impact strength and environmental stress crack resistance of said polymer mixture.
Claim 3
Dependent Claim
37 words
A polymer mixture as claimed in claim 1, characterized in that the mixture comprises 0.5-5.0 parts by weight of sulphonate C and 0.5-10 parts by weight of block copolymer D per 100 parts by weight of A+B.
Claim 4
Dependent Claim
63 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises as a block copolymer a styrene-butadiene-styrene block copolymer having a styrene content of 25-30% by weight, having a butadiene content of 70-75% by weight, the styrene block having a molecular weight of 5,000 to 20,000 and the block copolymer itself having a molecular weight of 50,000 to 150,000.
Claim 5
Dependent Claim
31 words
A polymer mixture as claimed in claim 3, characterized in that the polymer mixture comprises 1-3 parts by weight of sulphonate C and 2-5 parts by weight of block copolymer D.
Claim 6
Dependent Claim
32 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture moreover comprises 0.5-20 parts by weight of titanium dioxide per 100 parts by weight of A plus B.
Claim 7
Dependent Claim
32 words
A polymer mixture as claimed in claim 1, characterized in that the polymer mixture comprises a high-impact polystyrene based on a butadiene rubber having a cellular structure as a polyvinyl aromatic compound.
References Cited (Backward Citations)
US4304881A
Cited
US4529761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |