Abstract: This invention is directed to blends of novel poly(ester-carbonate)s containing repeating units derived from bis(3,5-dimethyl-4-hydroxyphenyl) sulfone and up to 80% of another dihydric phenol linked together by carbonate and arylate units and a polymer selected from the group consisting of an aromatic polycarbonate, a polyester, a polysulfone, a polyarylate, a poly(ether-imide), a styrenic polymer and a vinyl chloride containing polymer. The invention is also directed to a process for preparation of this polymer.

Abstract: Described is a process for improving the color of thermoplastic polymers by contacting the monomer(s) before or during polymerization with an alkali or alkaline earth metal formate.

Abstract: Circuit board substrates prepared from poly(aryl ether)s which contain repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl) sulfone (TMBS) exhibit adequate glass transition temperatures (Tg), acceptable plateability and acceptable resistance to water absorption.

Abstract: This invention is directed to novel aromatic polyformals comprising from about 5 weight percent to about 95 weight percent of repeating units (I) having the formula ##STR1## and from about 95 weight percent to about 5 weight percent of repeating units (II) having the formula ##STR2## in which the repeating units (I) and the repeating units (II) are connected by interbonding units (III) having the formula--CH.sub.2 -- (III)wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R.sub.1 is a divalent saturated or unsaturated hydrocarbon radical, O, CO, SO.sub.2, S or a direct bond, with the proviso that when R.sub.1 is SO.sub.2 then repeating unit (II) is not the same as repeating unit (I). The invention is also directed to a process for preparing the novel aromatic polyformals. The aromatic polyformals have utility as molded plastic materials, adhesives, sealants and the like.

Abstract: Color improved polyarylates having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm produced by a process comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.

Abstract: This invention is directed to novel poly(ester-carbonate)s containing repeating units derived from bis(3,5-dimethyl-4-hydroxyphenyl) sulfone and up to 80% of another dihydric phenol linked together by carbonate and arylate units. The invention is also directed to a process for preparation of this polymer.

Abstract: A moldable and compatible blend of 5 to 95 weight percent of an aromatic polyformal comprising from about 20 weight percent to 100 weight percent of repeating units (I) having the formula ##STR1## and from 0 weight percent to about 80 weight percent of repeating units (II) having the formula ##STR2## in which the repeating units (I) and the repeating units (II) are connected by interbonding units (III) having the formula--CH.sub.2 -- (III)wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R.sub.1 is a divalent saturated or unsaturated aliphatic hydrocarbon radical, O, CO, SO.sub.2, S or a direct bond, with the proviso that when R.sub.1 is SO.sub.2 then repeating unit (II) is not the same as repeating unit (I), and 95 to 5 weight percent of a styrene copolymer or terpolymer and/or vinyl chloride containing polymers.

Abstract: Poly(aryl ether)s which contain at least 20% by weight of bis-(3,5-dimethyl-4-oxyphenyl)sulfone structural units exhibit improved glass transition temperatures, improved flame resistance, improved gas permeability and improved alloying compatibility.

Abstract: Described herein is a process for preparing a polyester or a poly(ester carbonate) which comprises reacting a dihydric phenol with an aromatic diacid and a diaryl carbonate in the presence of from about 10 to about 60 weight percent of a processing aid under polyester or poly(ester carbonate) forming conditions.

Abstract: An improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.

Abstract: Described herein is an improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm which process comprises the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of at least one thermoplastic polymer. Also described herein are the products produced by said process.

Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of at least one particular halogenated and/or etherated substituted aromatic or heteroaromatic compound, at a temperature of from about 260.degree. to about 350.degree. C.

Abstract: Described herein are thermoplastic linear polymers containing recurring units of the formulae: ##STR1## wherein R is independently hydrogen, C.sub.1 to C.sub.6 alkyl, or C.sub.4 to C.sub.8 cycloalkyl, a is an integer of 0 to 4, Z is independently ##STR2## --SO--, --S--, --SO.sub.2 --, --O--, alkylene, cycloalkylene, arylene, alkylidene, or cycloalkylidene containing from 2 to 20 carbon atoms, with the proviso that Z cannot be ##STR3## when the connecting ether bonds are in the para position to Z; n is independently an integer of from 1 to 5. The units are attached to each other by an --O-- bond. Also, described herein is a process for preparing such polymers.

Abstract: Aryl and heteroaryl mono chlorides are coupled in an aprotic solvent under an inert atmosphere by a catalyst mixture of a nickel compound and a ligand in the presence of a reducing metal.

Abstract: Described herein is an improved process for preparing a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm which process comprises the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises removing residual acid anhydride, after formation of the dihydric phenol diester, so that its concentration is less than about 1500 parts per million. The novel polyarylates produced by the improved process of this invention are melt stable and low in color.

Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260.degree. to about 350.degree. C. and in the presence of a magnesium catalyst.

Abstract: Described herein is a process for preparing polyarylates of improved color which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of at least one cycloaliphatic, substituted aromatic or heteroaromatic compound, which compounds contain at least one benzylic and/or tertiary hydrogen atom, at a temperature of from about 260.degree. to about 350.degree. C. Optionally, the process may be carried out in the presence of a magnesium, manganese, or zinc catalyst.

Abstract: Described herein is a process for preparing polyarylates which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260.degree. to about 350.degree. C.

Abstract: Described herein are molding compositions of blends of a poly(aryl ether) resin and a polyetherimide resin. These compositions have improved environmental stress crack resistance.

Abstract: Described herein is a process for preparing melt stable polyarylates having a reduced viscosity of from about 0.4 to greater than 1.0 dl/g which comprises reacting a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid to produce a polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/g, and then adding a stabilizing amount of an aromatic phenol to the polyarylate to form a polyarylate substantially free of anhydride linkages.