Abstract: A process of forming a polycarbonate comprises providing a reaction mixture of at least one polycarbonate-forming monomer and carbon dioxide; and then reacting the polycarbonate-forming monomer and carbon dioxide in the reaction mixture to form the polycarbonate. In one embodiment, the polycarbonate is present in a condensate, and the process further comprises removing carbon dioxide from the reaction mixture; and then collecting the condensate from the reaction mixture. Moreover, uncrystallized polycarbonate may be treated with carbon dioxide to form crystalline polycarbonate. The crystalline polycarbonate is then rendered useful for solid state polymerization.

Abstract: Linear polyesters are branched by transesterification with resins having the formula: ##STR1## wherein n is an integer of from 1 to 10.

Abstract: The invention relates to a process for the preparation of poly (ester-carbonate)s from the corresponding oligomers, using solid state polymerization process, which comprises mixing the desired oligomers in a suitable solvent or non-solvent, adding a suitable catalyst to this mixture, refluxing the mixture for a period of 1 to 8 hours, removing the solvent by known methods, polymerization the oligomer mixture in the solid state either in presence of vacuum or under a flow of inn gas at a temperature ranging between 180-240.degree. C. for a period of 5 to 20 hours to obtain the product.

Abstract: A recording material, more particularly for ink-jet printers, comprises an inking layer formulated to locally receive a water-soluble pigment solution and containing an epoxy cross-linkable, carboxyl-grouped cationic mixed polymer, an epoxidized metal oxide and a water-soluble polymer.

Abstract: A hair cosmetic composition comprising an amine-oxide-containing water-soluble resin having a weight-average molecular weight of 5,000 to 1,000,000. The hair cosmetic composition of the present invention has excellent setting force, conditioning effects and hair-washing property and being free from stickiness.

Abstract: A polycarbonate resin composition comprising (A) 5 to 95 parts by weight of a polycarbonate resin comprising a plurality of aromatic polycarbonate main chains, wherein the aromatic polycarbonate main chains collectively contain specific heterounits in a specific amount in the polycarbonate main chains, and (B) 5 to 95 parts by weight of a rubber-reinforced thermoplastic resin comprising a graft copolymer which is obtained by a method comprising grafting on a rubber polymer at least one vinyl compound. The resin composition of the present invention has high impact resistance and high moldability. When the resin composition further comprises a flame retardant (C) and an anti-dripping agent as optionally components, the resin composition has an extremely high dripping-preventive property, as compared to a conventional polycarbonate resin composition containing a flame retardant and an anti-dripping agent.

Abstract: A polyester resin for toner comprising an acid component containing at least one selected from the group consisting of aromatic dicarboxylic acids and their lower alkyl esters, and an alcohol component containing at least one selected from the group consisting of bisphenol A derivative diols, wherein the content of aldehyde compounds, their decomposition products and by-products in the polyester resin is no more than 200 ppm. Toner polyester resins and toners are obtained which do not generate irritating odors even upon melting and kneading during the toner production or upon heating during the copying process, which provide clear images with no haziness due to reduced light permeability of the copy material, which have a wide range of color tone reproduction, and which provide excellent image precision on copied print.

Abstract: A process has been surprisingly discovered that can produce a high heat carbonate polymer (i.e., one with a Tg greater that 150.degree. C.), without the drawbacks encountered in attempts to produce a high heat carbonate polymer. The process of the instant invention comprises the steps of:(1) reacting an aromatic amine with a dihydric phenol to prepare an aminophenol;(2) reacting an anhydride or dianhydride with the aminophenol to prepare a phenolic precursor; and(3) reacting the phenolic precursor with a carbonate precursor to prepare a high heat carbonate polymer.

Abstract: Polytrimethylene terephthalate is prepared in a process which includes adding a hindered phenol and an aromatic organophosphite to the polymerization reaction mixture. The process generates a reduced level of acrolein and prepares an improved polyester product compared with processes without the phenol and organophosphite additives.

Abstract: The disclosure describes reacting a multi-functional phenolic or carboxylic branching agent with a transesterification catalyst to form an organic salt prior to reactive extrusion of said organic salt branching agent with linear polycarbonate resin as a means to dramatically increase the efficiency of the branching agent in the preparation of branched polycarbonate.

Abstract: Polyesters such as poly(1,4-cyclohexanedimethyl-1,4-cyclohexanedicarboxylate) are prepared by the reaction of at least one relatively non-volatile diol, preferably 1,4-cyclohexanedimethanol, with a 1,4-cyclohexanedicarboxylic acid ester in the presence of a catalyst such as a tetraalkyl titanate. Maximum molecular weight and crystallinity are provided by at least one of two options: conducting the reaction at a series of progressively increasing temperatures below 265.degree. C., with a residence time in the range of 40-120 minutes at temperatures above 250.degree. C.; and conducting an initial stage of the reaction in the presence of at least one C.sub.2-6 aliphatic diol such as ethylene glycol, diethylene glycol or 1,4-butanediol.

Abstract: A method of cleaning or purifying elastomers and elastomeric articles which are intended for medical or pharmaceutical use is disclosed. In particular, although not exclusively, the invention has applicability to elastomers which are used in metering valves for pressurized metered dose inhalers (MDIs).

Abstract: A process for the improvement of the drawing ability of polyester, pellets of which are thermally post-treated in the solid phase in an inert atmosphere, containing a precise concentration of water vapor. The water vapor concentration is equal to the amount of water, plus 15%/minus 50%, which could theoretically be formed, at the polyester end viscosity, from the --COOH end groups and the excess --OH end groups of the polyester. An equimolar quantity of the vapor of the alkanediol, which serves as the diol reactant for the polyester, may be substituted for all or part of the water vapor.

Abstract: An apparatus and method for extracting plasticizer from polymer structures includes, in one embodiment, a vacuum chamber, a heating member and a condenser, the plasticizer being vaporized from the polymer structure by a combination of low temperature and heat, and in another embodiment, an evaporation chamber, a conveyer belt, and a plasticizer removal system, the plasticizer removal system including a duct having mounted therein a heating member, a fan and a condenser so that plasticizer may be extracted by forced air convection.

Abstract: The present invention relates to a high molecular weighted biodegradable polyester resin which can be used in medical, agricultural and fishery packaging materials by enhancing the low heat-resistance of the general aliphatic polyester and the preparing method for them. The present invention provides a polyester resin which is prepared by condense-polymerization after one or a plurality of condensation, esterification and ester-exchange reaction with main ingredients of (1) an aliphatic (including circular aliphatic) dicarboxylic acid (or an acid anhydride thereof) including an adipic acid, (2) an aliphatic (including circular aliphatic) glycol at least selected from one of 1,4-butanediol and ethyleneglycol with a little of a monomer including one or a plurality of an amine radical from 0.

Abstract: An object is: to provide a novel, generally applicable polymerization initiator which can be prepared easily and which is highly stable, for application to the production of polymers and block copolymers of .alpha.,.beta.-unsaturated carboxylic acid esters; to polymerize .alpha.,.beta.-unsaturated carboxylic acid esters using the polymerization initiator; and to provide a novel, generally applicable production process for polymers and block copolymers of .alpha.,.beta.-unsaturated carboxylic acid esters having high molecular weight and little discoloration, by which active hydrogen-containing monomers can be polymerized. This is achieved by a novel production process involving polymerization of various .alpha.,.beta.-ethylenically unsaturated carboxylic acid esters using as a polymerization initiator a polymer containing a tertiary amino group obtained by the polymerization of an .alpha.,.beta.

Abstract: Biodegradable resin products consisting essentially of a polymeric resin of polyethylene, starch, polyesters such as polylactic acid, or other suitable polyesters. In admixture with the resin is a particulate vapor phase corrosion inhibitor selected from amine salts, ammonium benzoate, triazole derivatives, tall oil imidazolines, alkali metal molybdates, alkali dibasic acid salts, and mixtures thereof, and is present in an amount ranging from between about 1% and 3% by weight of the polymeric resin.

Abstract: A polycarbonate copolymer comprising the repeating structural unit represented by general formula (1-a) and at least one of the repeating structural units represented by general formulas (2-a) and (3-a) is provided.

Abstract: An epoxy resin-free coating system based on thermoplastic polyesters into which a polyester is incorporated as adhesion-promoting additive, which polyester is non-toxic.

Abstract: A process for producing a coating compositions for use over chalky substrates comprising a partial interpenetrating network of a polyurethane component and a waterborne polymer component, wherein the polyurethane component is prepared in the presence of the waterborne polymer component.