Abstract: Solvent-resistant resin blends, capable of being molded into parts which vary in properties relatively little over a wide range of molding conditions, are prepared from a polyphenylene ether, a linear polyester such as a poly(alkylene dicarboxylate), a mixture of a bisphenol A homopolycarbonate and block copolymer of a polyphenylene ether and a bisphenol A polycarbonate. Said blends preferably also contain at least one elastomeric polyphenylene ether-compatible impact modifier.

Abstract: Polymer blends having improved impact resistance and structural integrity comprise at least one aromatic polymer such as polyphenylene oxide, optionally in combination with a styrene homopolymer; at least one elastomer containing highly polar ionic (e.g., sulfonate or carboxylate) substituents, such as a sulfonated EPDM rubber or a zwitterionic polysiloxane sulfonate; and at least one substituted aromatic polymer in which the substituents are highly polar ionic substituents, such as a sulfonated polyphenylene oxide or styrene-sodium acrylate copolymer. The compositions preferably also contain at least one plasticizer.

Abstract: Silicone-polyarylene ether block copolymers are provided which can be made by effecting reaction between amino terminated polydiorganosiloxane and anhydride functionalized polyarylene ether.

Abstract: Polyphenylene ether-polycarbonate copolymers are prepared by reacting a polyphenylene ether, preferably one which has been acid-functionalized by reaction with a compound such as maleic anhydride or fumaric acid, with an aromatic polycarbonate at a temperature of at least about 175.degree. C. in the presence of a polycarbonate-forming transesterification catalyst, typically a tetraalkyl titanate or a tetraalkylammonium tetraphenylborate. Under these conditions, the polycarbonate chain is cleaved and fragments thereof are chemically bonded to the polyphenylene ether.

Abstract: Ionomers in the salt form, such as the ammonium salts of sulfonated polystyrene, are precipitated from solution in a non-polar organic liquid by contact with a polar liquid in which the ionomer has only limited solubility (e.g., methanol) and a particulate solid such as a polyphenylene ether, followed by contact with a salt such as ammonium chloride, preferably in solution in the polar liquid. The resulting ionomer-coated polyphenylene ether particles are easily filtered and handled.

Abstract: Polycarbonates exhibiting improved heat resistances comprised of the reaction products of (i) a carbonate precursor and (ii) at least one dihydric phenol represented by the general formula ##STR1## wherein: R and R.sup.1 are independently selected from alkyl radicals;A is selected from divalent hydrocarbon radicals, ##STR2## and n is either zero or one.

Abstract: This invention relates to an improved interfacial polycondensation polycarbonate process wherein a dihydric phenol is reacted with a carbonyl halide in the presence of a quaternary-phosphonium amino halide catalyst.

Abstract: Siloxane polymers containing zwitterions on tertiary silicone atoms and their aminoalkyl siloxane polymer intermediates are provided. Methods of their production are also provided. The aminoalkyl siloxane polymer intermediates and the zwitterionic siloxane polymers are obtained by co-polymerizing trifunctional aminoalkyl silanes or zwitterionic silanes, respectively, with hydroxy-terminated siloxane oligomers in the presence of an acid catalyst. The aminoalkyl siloxane polymer intermediates are converted to zwitterionic siloxane polymer by reaction with an organosultone or an organolactone. Trifunctional aminoalkyl silanes are readily available and utilizing these silanes provides an economical route to obtaining zwitterionic siloxane polymers.

Abstract: Zwitterionic siloxane polymers containing tertiary silicone atoms with zwitterions and their aminoalkyl siloxane polymer intermediates production are provided. Methods of their production are also provided. The aminoalkyl siloxane polymer intermediates and the zwitterionic siloxane polymers are obtained by co-polymerizing trifunctional aminoalkyl silanes or zwitterionic silanes, respectively, with hydroxy-terminated siloxane oligomers in the presence of an acid catalyst. The aminoalkyl siloxane polymer intermediates are converted to zwitterionic siloxane polymer by reaction with an organosultone or an organolactone. Trifunctional aminoalkyl silanes are readily available and utilizing these silanes provides an economical route to obtaining zwitterionic siloxane polymers.

Abstract: The melt viscosity of thermoplastic compositions of polyphenylene ether resin and rubber modified high impact polystyrene resin is significantly reduced by inclusion of a tetra-alkyl bisphenol polycarbonate resin. The resulting blend can be processed at lower temperatures, and, after molding, exhibits better UV color stability while retaining most important other physical properties. Both the compositions and a method of preparation are described.

Abstract: A method is provided for producing aminoalkyl-siloxane polymers of a high molecular weight by hydrolyzing a difunctional aminoalkyl-silane prior to incorporation into the siloxane polymer. The high molecular weight siloxane polymers obtained may be converted to zwitterionic siloxane rubbers with excellent engineering properties and integrity.

Abstract: A method is provided wherein ionically cross-linked zwitterionic siloxane polymers are solubilized by the addition of a weak base to a combination of the zwitterionic siloxane polymers and an organic solvent. Where a weak base having a high vapor pressure is utilized, the zwitterionic siloxane polymers can be recured by evaporation of the organic solvent and base.

Abstract: This invention relates to an improved interfacial polycondensation polycarbonate process wherein a dihydric phenol is reacted with a carbonyl halide in the presence of a quaternary-phosphonium amino halide catalyst.

Abstract: A method is provided for making sulfonated aromatic organic polymers having aminoorganomercaptan groups attached to backbone sulfonyl radicals by covalent nitrogen-sulfur linkages. These sulfonated aromatic organic polymers can be used as an ion-exchange resin for making bisphenols.

Abstract: An improved interfacial polycondensation polycarbonate process, the improvement comprising an initial equilibrated pH range of 11 to 13, a temperature range of 15.degree. to 40.degree. C., a carbonyl halide rate of addition of 0.03 to 0.3 moles per minute per mole of aromatic dihydroxy compound, and a chain stopper content of 0.02 to 0.05 moles per mole of aromatic dihydroxy compound. The resulting aromatic polycarbonate exhibits improved chemical and physical properties having a weight average molecular weight within a range of from about 25,000 to 65,000, and a monocarbonate content of less than about 400 parts per million.

Abstract: This invention relates to block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Abstract: This invention relates to block copolymers of polyphenylene oxides and non-sterically-hindered high molecular weight aromatic polycarbonates. These block copolymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.

Abstract: Isomerization of an ortho, para-isomer of a dihydroxydiphenyl chloroethylene compound to the corresponding para, para-isomer can be effected by treatment of the former with trifluoromethanesulfonic acid in the presence of phenol.

Abstract: The compound 1,1-dichloro-2,2-bis-(4-hydroxyphenyl)ethylene can be prepared by the reaction of 1,1-dichloro-2,2-diphenoxy ethylene and phenol in the presence of triflic acid. The formed dihydroxydiphenyl chloroethylene can be treated with a phosgenating agent to form polycarbonate resins which can be used in applications where flame retardancy is desired.

Abstract: Diphenyl chloroethylenes are prepared by the reaction of either phenol or anisole with a trihaloethylene compound.