Mitsubishi Gas Chemical Company, Inc.

Masanobu Masu

Akitoshi Sugio

Masao Okabe

Eiichi Yonemitsu

Masatugu Matunaga

Masaharu Kimura

Norio Sayama

Yukio Sasaki

Kozo Ishiyama

Akikazu Amagai

Toshihiko Kobayashi

Keiun Ko

Eiji Ukita

Hiroshi Yoshioka

Takao Kawaki

Takanari Nawata

Isao Nomura

Kazuo Yamamiya

Zenpei Mizutani

Hidenori Kimpara

Masatsugu Matsunaga

Hiroshi Nakai

Kenzi Kouno

A polyphenylene ether resin composition comprising

Polyphenylene ether resin composition

A polyphenylene ether resin composition comprising:

Polyphenylene ether resin composition suitable for electroless plating

A curable resin composition comprising (a) a polyphenylene resin, (b) a maleimide compound and/or a cyanate ester compound and (c) at least one compound selected from the group consisting of compounds having one or more acryloyl, methacryloyl, acryloxy or methacryloxy groups is disclosed. The curable resin composition can give a cured resin having resistance to heat, solvent and moisture and adhering property.

Curable resin composition

A resin composition comprising a polyphenylene ether resin and a rubber-modified polystyrene resin, wherein at least 80% of the rubber particles based on the total number of rubber particles in the elastomeric phase of the rubber-modified polystyrene resin have a particle diameter in the range of 0.5 to 4 microns, and the elastomeric phase has a particle size distribution index, SDI, defined by the equation ##EQU1## wherein x is the diameter in microns of the particles, and n is the number of particles having a particle diameter of x microns, of not more than 1.9.

Polyphenylene ether resin

A polyphenylene ether resin composition having improved heat stability and good color, said composition comprising a polyphenylene ether resin matrix, and dispersed therein, a diphosphonite of the formula ##STR1## wherein R.sub.1 groups are identical or different and each represents a linear or branched alkyl group having 1 to 10 carbon atoms.

Polyphenylene ether resin composition having improved heat stability

A curable polyphenylene ether resin composition comprising

Curable polyphenylene ether resin composition

A polyphenylene ether resin composition having improved heat stability, said composition comprising a polyphenylene ether resin matrix, and dispersed therein, a phosphonic acid or its derivative of the formula ##STR1## wherein R.sub.1 represents an unsubstituted or substituted phenyl or naphthyl group, or a linear or branched alkyl group with 1 to 18 carbon atoms, or a group of the following formula (a) ##STR2## R.sub.2 and R.sub.3 are identical or different and each represents hydrogen atom, a metal, an unsubstituted or substituted phenyl group, or an alkyl group with 1 to 10 carbon atoms; and R.sub.4 is a divalent hydrocarbon group with 2 to 10 carbon atoms.

A polyphenylene ether resin composition having improved heat stability, said composition comprising a polymer matrix composed of a polyphenylene ether resin and a vinyl aromatic resin, and dispersed in the polymer matrix, at least one compound selected from the group consisting of

Polyphenylene ether resin composition having improved heat stability and

An improved method for dispersing an inorganic pigment uniformly in polyphenylene ether resins. A polyphenylene ether composition having an inorganic pigment uniformly dispersed therein is obtained by intimately mixing a polyphenylene ether resin and the inorganic pigment in a weight ratio of from 0.5:1 to 2:1 by a high-speed mixer to form a pre-blend, and then mixing the pre-blend intimately with a polyphenylene ether in a conventional mixer such as an extruder. The pre-blend can also be uniformly dispersed in a mixture of the polyphenylene ether with polystyrene, a styrene/butadiene copolymer, a styrene/butadiene/acrylonitrile terpolymer, or a rubber-modified high impact polystyrene.

Process for producing polyphenylene ether composition containing

A fiber-reinforced composition of a polyphenylene ether resin having improved rigidity and dimensional stability, said composition consisting essentially of (a) a polyphenylene ether resin or a mixture of it with a styrene resin, and (b) asbestos fibers.

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Tokyo, Japan

Masanobu Masu