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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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
IDEMITSU KOSAN CO., LTD.TOKYO1638

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okada, Akihiko Ichihara, JP 43 492

Cited Art Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (6)
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 19 1991
 
IDEMITSU KOSAN CO., LTD. (6)
5,352,727 Syndiotactic polystyrene composition 33 1993
5,418,275 Polystyrene composition 38 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 36 1994
5,777,021 Composition of styrene polymer and polar group-containing polyphenylene ether 10 1997
 
BASF AKTIENGESELLSCHAFT (2)
4,751,268 Modified carboxyl-containing polyphenylene ether resins 15 1986
4,957,965 Thermoplastic molding materials 20 1988
 
BIOVALEUR SARL (1)
5,326,813 Thermoplastic resin composition containing a modified polyphenylene ether 36 1992
 
SABIC INNOVATIVE PLASTICS IP B.V. (1)
5,216,089 Modified polyphenylene ether resins having improved processability and oxidative stability 5 1988
 
The Dow Chemical Company (1)
5,412,024 Thermoplastic resin composition 40 1992

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SABIC INNOVATIVE PLASTICS IP B.V. (2)
6,894,102 Syndiotactic polystyrene blends 6 2002
7,524,894 Resin composition for wire and cable covering material 2 2003
 
BASF AKTIENGESELLSCHAFT (1)
6,762,218 Impact resistant thermoplastic molding materials comprised of syndiotactic polystyrene, glass fibers and thermoplastic elastomer (tpe) impact modifiers 7 2002
 
YAZAKI CORPORATION (1)
8,449,328 Thermoplastic elastomer resin composition and connector 3 2010