Abstract: Polyester amide silicate resinous products are produced by heating a mixture of an oxidated silicon compound, polyhydroxy compound, a polycarboxylic acid and/or polycarboxylic acid anhydride and a polyamine in the presence of an alkali catalyst.

Abstract: High molecular weight linear condensation polyesters are stabilized against deterioration by heat by reacting the polyester in molten form with alkylene carbonates in the presence of a catalytic amount of a compound selected from the group consisting of sodium iodide and potassium iodide.

Abstract: Polyester fibers having excellent antistatic properties are produced by incorporating therein a novel antistatic agent synthesized by partially esterifying a dimetallic salt with a polyalkylene glycol.

Abstract: A curing agent package is provided for polymercaptan-terminated polymers comprising selected metal oxides and organonitrogen accelerators and promoters commonly considered as rubber vulcanization accelerators. More specifically, sealant and coating compositions are prepared by curing a mixture comprising a mercaptan-terminated polyether-polyester liquid polymer, a curing agent package of a non-lead metal oxide curing agent and an organonitrogen accelerator or promoter, and, optionally, non-elastomeric materials.

Abstract: N-Hydroxyalkyltrimellitic acid imides of high purity are prepared by reacting trimellitic acid anhydride with a monoalkanolamine in an aqueous medium comprising an amount of not less than about 0.025 liter of a certain specific solvent or solvent mixture per 1 mole of the trimellitic acid anhydride and can be advantageously used for production of their polymers having a high thermal stability and a good color tone.

Abstract: Low temperature curable organic resin compositions, for example, epoxy resins are provided, which can be either exothermically cured or cured in several minutes or less at relatively low temperatures. Certain diaryliodonium salts have been found to spontaneously release strong protonic acids when used in combination with a copper salt and a reducing agent.

Abstract: Diaryliodonium salts have been found to be effective thermal initiators for the polymerization of a variety of cationically polymerizable materials including epoxides, cyclic ethers, phenol formaldehyde resins, etc., when used in combination with various cocatalysts. Among the cocatalysts which have been found to be effective are, for example, copper chelates and mixtures of such copper chelates with various reducing agents such as ascorbic acid, tin.sup.+2 salts, etc.

Abstract: Low temperature curable organic resin compositions, for example, epoxy resins are provided, which can be either exothermically cured or cured in several minutes or less at relatively low temperatures. Certain diaryliodonium salts have been found to spontaneously release strong protonic acids when used in combination with a copper salt and a reducing agent.

Abstract: At least one of an organo selenium and an organo tellurium curing agent is incorporated with a sealant comprising essentially a mercaptan-terminated polyether-polyester liquid polymer. In one embodiment there is provided a sealant composition comprising at least one of a selenium and tellurium N-substituted dithiocarbamate curing agent. Final compositions are obtained having improved thermal stability at temperatures of the order of 150.degree. C.

Abstract: Polyester films are modified by the addition of a high molecular weight polyethylene glycol and an alkali metal salt of a sulfonic acid-substituted dicarboxylic acid ester to the reaction medium during the polymerization process. Films prepared for example, from diesters of terephthalic acid in the presence of the modifiers of this invention exhibit good permeability to water vapor.

Abstract: Polyester fibers having excellent antistatic properties are produced by incorporating therein a novel antistatic agent synthesized by partially esterifying a dimetallic salt with a polyalkylene glycol.

Abstract: An improved process for producing a linear polyester having a high degree of polymerization which comprises first preparing a prepolymer of polyester and then polycondensing the prepolymer. In the first step, a prepolymer having an intrinsic viscosity of at least 0.2 is prepared, and the subsequent polycondensation is carried out in the presence of an organic boron compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent an alkyl, aralkyl or aryl group having 6 to 20 carbon atoms, and M represents a monovalent metal. According to this method, the polycondensation can be performed at atmospheric pressure, and a substantially linear polyester having an intrinsic viscosity of at least 0.5 and superior thermal stability can be obtained rapidly.

Abstract: A process for producing polyesters and copolyesters, useful for making films and fibers, by the polycondensation of dicarboxylic acids and aliphatic glycols using coordinations complexes of metal halides and silicon compounds as catalysts.

Abstract: The formation of manganese-derivative scale in equipment involved in polyester manufacture is reduced by introduction of a sterically hindered benzoic acid in approximately stoichiometric amount. The acids include 2,6-dichloro-, 2,6-dimethyl- and 2,4,6-trimethylbenzoic acids. The scale is believed to be insoluble manganese terephthalate, presumably formed by reaction of manganese acetate catalyst generated as a result of a side reaction during the ester exchange reaction of dimethyl terephthalate with excess ethylene glycol. Preferably an alkali metal salt of an organic acid, such as sodium acetate or lithium acetate is also used to give a synergistic effect in combination with the hindered acid.

Abstract: A melt processable resorcinol phthalate polyester having a terephthalic acid content not greater than about 30 mole percent is prepared by a two-stage process utilizing an alkali or alkaline earth metal acetate catalyst. The first stage yields a non-volatile pre-polymer which is then melt polymerized to the resorcinol phthalate polyester. A process for preparing a melt processable resorcinol phthalate polyester from resorcinol by reacting it with an acetylating agent is also disclosed. The resulting polyester exhibits high char and low flammability in addition to being melt processable.

Abstract: A process for preparing polyesters having superior thermal stability, transparency and chemical resistance, which comprises (1) a first step of esterifying (A) a difunctional carboxylic acid containing at least 60 mole% of an aromatic dicarboxylic acid, (B) 0 to 80 mole%, based on component (A), of an aliphatic diol and/or a dihydroxybenzene and (C) an aromatic monohydroxy compound in an amount of at least 210 mole% as a total of it and component (B) based on component (A), the esterification being performed until the degree of esterification reaches at least 80%, (2) subsequently, a second step of adding 0 to 80 mole%, based on component (A), of component (B) and a bisphenol (D) in an amount of 100 to 130 mole% as a total of it and component (B) based on component (A) to the reaction product obtained in the first step and reacting the mixture, the total amount of components (B) used in the first and second steps being 0 to 80 mole% based on component (C), and (3) performing at least the first of the above st

Abstract: A process for the production of high molecular weight low color polyethylene terephthalates using a particulaarly effective polycondensation catalyst is disclosed. Titanium tetrabutylate is added to the reaction mixture after the initial esterification or transesterification reaction is about 95% complete and the polycondensation is completed at temperatures between about 200 and 270.degree. C under reduced pressure. Metaphosphoric acid or its alkali or alkaline earth metal salts are added with the titanium tertrabutylate to control the color. Commonly accepted catalysts may be employed for the initial esterification or transesterification. Polymers with intrinsic viscosities in excess of 0.7 dl/g and yellowness numbers less than 6 can be produced.

Abstract: A polyester film is disclosed which comprises a polyester mainly consisting of polyethylene terephthalate and an additive amount of granular calcium terephthalate anhydride particles having a specific volume shape factor. The average particle diameter and additive amount of the granular calcium terephthalate anhydride particles may be controlled so that the film is particularly suitable as a metallized film or a condenser film.