US Patent No: 5,952,431
Number of patents in Portfolio can not be more than 2000
Process for producing acid-modified polyphenylene ether and polystyrenic resin composition
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Sep 14, 1999
Issued date -
Jan 16, 1997
filing date -
08/765,443
serial no -
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Abstract
A process for producing an acid-modified polyphenylene ether comprising conducting modification reaction substantially in the absence of solvents at 300 to 350.degree. C. by using (a) 100 parts by weight of a polyphenylene ether, (b) 0.1 to 5.0 parts by weight of fumaric acid or a derivative of fumaric acid, and optionally (c) 0.1 to 5.0 parts by weight of a radical generating agent having a half-life of 1 minute at a temperature of 300.degree. C. or higher; and a polystyrenic resin composition comprising (d) 100 parts by weight of a styrenic polymer having the syndiotactic configuration or 100 parts by weight of a component composed of a styrenic polymer having the syndiotactic configuration and a rubbery elastomer and/or a polyamide, (e) 0.5 to 5.0 parts by weight of an acid-modified polyphenylene ether obtained by the above process, and optionally (f) 1 to 350 parts by weight of inorganic filler. A convenient process for producing an acid-modified polyphenylene ether which does not cause deterioration of the working environment, enables stable production, and suppresses decrease in the molecular weight has been developed. A polystyrenic resin composition which can exhibit high toughness is provided by using the obtained acid-modified polyphenylene ether.
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,684,669 Modified polyphenylene ether resins having improved foamability and methods of making the same | 7 | 1986 | |
| 4,792,586 Impact strength of polyphenylene ether-linear polyester articles | 14 | 1986 | |
| 4,814,393 Composition of graft modified polyphenylene ether and polycarbonate | 4 | 1987 | |
| 4,994,531 Functionalized polyphenylene ethers, method of preparation, and polyphenylene ether-polyamide compositions prepared therefrom | 12 | 1987 | |
| 4,889,889 Trialkylamine salt-functionalized polyphenylene ethers methods for their preparation, and compositions containing them | 11 | 1988 | |
| 5,248,728 Impact modified polyphenylene ether-polyamide compositions | 18 | 1991 | |
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| 5,352,727 Syndiotactic polystyrene composition | 33 | 1993 | |
| 5,418,275 Polystyrene composition | 37 | 1993 | |
| 5,444,126 Process for producing a modified polyphenylene ether | 30 | 1994 | |
| 5,436,397 Polystyrene composition | 37 | 1994 | |
| 5,543,462 Impact resistant polystyrene composition | 34 | 1994 | |
| 5,777,021 Composition of styrene polymer and polar group-containing polyphenylene ether | 10 | 1997 | |
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| 4,751,268 Modified carboxyl-containing polyphenylene ether resins | 14 | 1986 | |
| 4,957,965 Thermoplastic molding materials | 20 | 1988 | |
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| 5,326,813 Thermoplastic resin composition containing a modified polyphenylene ether | 36 | 1992 | |
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| 5,216,089 Modified polyphenylene ether resins having improved processability and oxidative stability | 5 | 1988 | |
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| 5,412,024 Thermoplastic resin composition | 36 | 1992 | |