Novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a polycarboxylic acid and the reaction product thereof and an improved process for preparing the same.

Modified polyphenylene ether-polyamide compositions and process

Polyphenylene ether-polyamide compositions having improved resistance to water absorption and swell are provided by incorporating therein a phenolic compound.

Polyphenylene ether-polyamide compositions

A free-flowing silicone polymer powder, having an average particle size of 1 to 1000 microns and prepared by mixing a polydiorganosiloxane with a silica filler, is uniformly dispersed in an organic resin using conventional equipment, such as a single screw or, preferably, a twin screw extruder. When employed at a concentration of about 0.5 to 25 parts by weight of powder per 100 parts by weight of resin, a significant improvement in the burn character of the modified resin is obtained such that the rate of heat release, generation of smoke and evolution of toxic carbon monoxide gas is significantly reduced relative to the unmodified resin.

Method for imparting fire retardancy to organic resins

Process for the manufacture of modified polyphenyl ether or structurally related polymers comprising the reaction of said compound with a para substituted phenylsulphonyl halide, in the presence of a substituted pyridine derivative as catalyst and an acid neutralizing agent, and in a vinyl substituted aromatic monomer as solvent; modified polyphenylene ethers or structurally related polymers so obtained and use of them for the manufacture of modified high temperature rigid poly(vinyl substituted aromatic) polymer compositions.

Process for preparation of modified polyphenylene ether or related polymers and the use thereof in modified high temperature rigid polymer of vinyl substituted aromatics

Stabilized polyphenylene ether type resin composition obtained by compounding a polyphenylene ether type resin with one or more of stabilizer-component such as those respectively (a) a high molecular phosphorous ester having at least three phosphorous ester-bondings per molecule, (b) a high molecular phosphorous ester as said above and dicarboxylic acid dihydrazide substitution product, (c) a high molecular phosphorous ester as said above and steric hindered phenols and (d) a high molecular phosphorous ester as said above, steric hindered phenols and dicarboxylic acid dihydrazide substitution product; and, if desired, boron oxide.

Stabilized polyphenylene ether resin composition

A novel composition which has been improved in elongation and impact resistance is obtained by blending polyphenylene oxide with a small amount of a rubbery polymer, while said composition still retains excellent properties inherent to polyphenylene oxide itself, as they are, for example, thermal resistance, chemical resistance, mechanical and electrical properties. The amount of the rubbery polymer to be blended is less than 10 % by weight, preferably 0.5 to 5 % by weight, based on the weight of the whole composition. As the rubbery polymer, there may be used such rubbery polymers as obtained from conjugated diolefins, olefins, vinyl compounds and alkylene oxide. The above-mentioned two components of composition may be blended together according to a mechanical mixing method, solution mixing method or latex mixing method.

Rubber modified polyphenylene oxide composition

A relatively small amount of styrene can be smoothly graft-polymerized on a polyphenylene oxide with a high graft efficiency and in a high polymerization yield by polymerizing 0.4 to 2 parts by weight of a styrene compound in the presence of 1 part by weight of a polyphenylene oxide, or 15 to 60 parts by weight of a styrene compound in the presence of 40 to 85 parts by weight of a mixture comprising 74 to 96% by weight of a polyphenylene oxide and 26 to 4% by weight of a rubbery polymer, in an aqueous dispersion containing a dispersion stabilizer and a radical initiator.

Production of modified polyphenylene oxide

MODIFIED POLYPHENYLENE OXIDES EXCELLENT IN PROCESSABILITY AND MOLDABILITY ARE OBTAINED BY GRAFT-POLYMERIZING ON A POLYPHENYLENE OXIDE A STYRENE TYPE COMPOUND OR A MIXTURE OF THE STYRENE TYPE COMPOUND AND AN A-ALKYL SUBSTITUTION PRODUCT OF SAID COMPOUND, IN AN AQUEOUS DISPERSION CONTAING AN ANIONIC OR NONIONIC SURFACTANT, A RADICAL INITIATOR AND A SOLVENT FOR THE POLYPHENYLENE OXIDE.

Modified polyphenylene oxide and method for production thereof

THE PRESENT COMPOSITION OF POLYPHENYLENE OXIDE HAS AN IMPROVED STABILITY AGAINST DETERIORATION OF QUALITY AND IN DISCOLORATION, AND COMPRISES A POLYPHENYLENE OXIDE, 0.005 TO 5/% BY WEIGHT OF AT LEAST ONE KIND OF HINDERED PHENOL AND 0.005 TO 5% BY WEIGHT OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF TRIALKYL PHOSPHITES, TRIARYL PHOSPHITES, TRIALKYL THIOPHOSPHITES, TRIARYL THIOPHOSPHITES, THIOPHOSPHITES, THIOETHERS OF CARBOXYLIC ACID ESTERS, THIOETHERS, METAL ALKYLDITHIOCARBAMATES AND METAL ARYLDITHIOCARBAMATES.

Isao Maruta

Papers

Rubber modified polyphenylene oxide composition

Production of modified polyphenylene oxide

Modified polyphenylene oxide and method for production thereof

Stabilized composition of polyphenylene oxide