Abstract: Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof and end-capped with brominated phthalimide groups, and have the general formulae ##STR1## R.sup.1 is alkylene of from about 2 to about 6 carbon atoms; R.sup.1 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; n' is from about 3 to about 15; and n" is from about 1 to about 10. Thermoplastic compositions, for example, polyphenylene ether compositions, rendered flame retardant with the novel compounds have a high resistance to additive vaporization and surface liquid exudation as well as desirable high flow characteristics.

Abstract: Novel flame retardant agents comprise polyalkylene oxides or a derivative thereof end-capped with brominated phthalimide groups, and have the general formulaeR--R.sup.1 --O--R.sup.1).sub.n R (I)(R--R.sup.1 --O--R.sup.1).sub.n' NH).sub.2 C.dbd.O (II)orR--R.sup.1 --OR.sup.1).sub.n" CH.sub.2).sub.3 C--R.sup.2 (III)wherein R is ##STR1## R.sup.1 is alkylene of from about 2 to about 6 carbon atoms; R.sup.1 is alkyl of from about 1 to about 6 carbon atoms; n is from about 4 to about 40; n' is from about 3 to about 15; and n" is from about 1 to about 10. Thermoplastic compositions, for example, polyphenylene ether compositions, rendered flame retardant with the novel compounds have a high resistance to additive vaporization and surface liquid exudation as well as desirable high flow characteristics.

Abstract: Compositions comprising predominately a polycarbonate resin, e.g., poly(bisphenol A carbonate), and a polyester resin, e.g., poly(1,4-butylene terephthalate), alone, or in combination with one or more second resins, are melt stabilized with monosodium phosphate and/or monopotassium phosphate.

Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a substituted pyridine or a salt of a substituted pyridine.

Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a cyclic amidine.

Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an amino amidine or amino guanidine.

Abstract: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a non-cyclic amidine.

Abstract: A thermal oxidative stabilized polycarbonate composition comprises in admixture (a) a high molecular weight aromatic carbonate polymer and (b) a minor amount of an end-blocked polyorganohydrogen siloxane and, optionally, an organic phosphite or phosphonite and/or epoxy compound.

Abstract: A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and treating the resulting mixture with anhydrous hydrogen bromide to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.

Abstract: A thermally stable polycarbonate composition comprising in admixture, an aromatic carbonate polymer and a stabilizing amount of an additive which is a combination of an epoxy compound prepared from an epichlorodydrin and the reaction product of an alkyl phosphite and the chlorine containing contaminant in said epoxy compound.