摘要:
A method for making polyarylene ethers is described and the method comprises the step of polymerizing hydroxyaromatic monomers or oligomers prepared therefrom in the presence of pyridine catalysts.
摘要:
Disclosed are polymer blends and compolymers of polyphenylene ethers, functionalized by copolymers of dicarboxylic acid and salicylic acid, which react with polyamides and are capable of compatibilizing blends of polyphenylene ethers and polyamides.
摘要:
An odor free polyphenylene ether is made from polymerization grade phenolic monomer which has been crystallized from a solvent. An amine free catalyst is used to polymerize the monomer. The polyphenylene ether is useful as a packaging material for food which is to be stored at a low temperature and/or cooked in the package at a high temperature.
摘要:
Polymer blends and copolymers made therefrom, of anhydride-functionalized polyphenylene ether and polyetherimide. The components of the blends have improved compatibility, resulting in more homogeneous blends. The blends exhibit good mechanical properties and are suitable for forming films, molded products and other useful articles of manufacture. The copolymers have utility as compatibilizers for blends of polyphenylene ether and polyetherimide.
摘要:
Silicone-polyarylene ether block copolymers are provided which can be made by effecting reaction between amino terminated polydiorganosiloxane and anhydride functionalized polyarylene ether.
摘要:
A continuous process for preparing polyphenylene ether resins without removing water is described in which only two continuously vigorously stirred reactors are used with the average residence time in the two reactors being correlated to yield resin having an intrinsic viscosity of at least about 0.35 deciliter/gram.
摘要:
Disclosed are blends of (a) a polyetherimide and (b) a minor amount of an acrylate copolymer of C.sub.1 -C.sub.5 acrylate and C.sub.1 -C.sub.5 methacrylate. These blends have a higher impact strength than that associated with the polyetherimide component of the blends. In addition, the blends exhibit improved extrusion and molding performance characteristics over those of the polyetherimide component of the blend when molded alone.
摘要:
A method is provided for making polyetherimides, based on the use of certain organic diamine catalysts, for example, 4-dimethylaminopyridine and secondary or tertiary aliphatic diamines, to accelerate the intercondensation of aromatic bis(ether anhydride) and organic diamine under solution or melt polymerization conditions. The resulting polyetherimides are high performance injection moldable thermoplastics.
摘要:
New polymers comprising acyl capped quinone-coupled polyphenylene oxides are described. The resulting new polymers have improved color and in combination with styrene resins provide thermoplastic compositions having improved chemical and physical properties.
摘要:
A process of forming heterocyclic-coupled linear, branched and/or cross-linked polymers of polyphenylene oxides is described which comprises contacting heterocyclic halides with (a) polyphenylene oxides having an average hydroxyl group per molecule value greater than zero including 1.0 or less, or (b) quinone-coupled polyphenylene oxides having an average hydroxyl group per molecule value greater than zero including 2.0 or less, including mixtures of (a) and (b).