Abstract: A melt polymerization process for the preparation of poly(1,3-propylene-co-isosorbide) terephthalate (3GIT), new 3GITs and products made from the 3GITs. The process comprises (a) providing a mixture comprising terephthalic acid or its alkyl ester, 1,3-propanediol and isosorbide in a molar ratio of diols to terephthalic acid or its alkyl ester of from about 1.1:1 to about 1.6:1 and a molar ratio of 1,3-propanediol to isosorbide of from about 2:1 to about 10:1; (b) reacting the mixture in an inert atmosphere at a temperature of about 180 to about 245° C., with concurrent removal of a distillate comprising at least 80% of the water or alkanol volatile reaction product, wherein the distillate contains less than about 5 weight % 1,3-propanediol and less than 1 weight % isosorbide; and (c) continuing the reaction in the presence of a polycondensation catalyst at a pressure of about 0.25 to about 2 mm Hg and about 245 to about 260° C.

Abstract: A melt polymerization process for the preparation of poly(1,3-propylene-co-isosorbide) terephthalate (3GIT), new 3GITs and products made from the 3GITs. The process comprises (a) providing a mixture comprising terephthalic acid or its alkyl ester, 1,3-propanediol and isosorbide in a molar ratio of diols to terephthalic acid or its alkyl ester of from about 1.1:1 to about 1.6:1 and a molar ratio of 1,3-propanediol to isosorbide of from about 2:1 to about 10:1; (b) reacting the mixture in an inert atmosphere at a temperature of about 180 to about 245° C., with concurrent removal of a distillate comprising at least 80% of the water or alkanol volatile reaction product, wherein the distillate contains less than about 5 weight % 1,3-propanediol and less than 1 weight % isosorbide; and (c) continuing the reaction in the presence of a polycondensation catalyst at a pressure of about 0.25 to about 2 mm Hg and about 245 to about 260° C.

Abstract: A process for melt spinning spandex, utilizing a polyurethaneurea polymer prepared from a purified capped glycol, linear aliphatic diamines and a monoamine chain terminator, is provided.

Abstract: A thermoplastic, segmented, linear copolyetherester elastomer with soft segments derived from poly(alkylene oxide) glycol and hard segments of poly(1,2-ethylene terephthalate) or poly(1,4-butylene terephthalate) contains very small amounts of certain bifunctional units. Preferred units are derived from trans-1,4-cyclohexylene-bis-(N-trimellitimide) and p-phenylene-bis-(N-trimellitimide). Fibers of the elastomer have non-tacky characteristics and improved elastic properties.

Abstract: A thermoplastic, segmented, copolyetherester elastomer having soft segments derived from poly(alkylene oxide) glycols and bibenzoic acid, and hard segments constituting 10-17 weight percent of the elastomer and being 95 to 100% poly(1,3-propylenebibenzoate). Melt-spun fibers of the elastomer have significantly superior elastic and set properties and are less stiff than similar elastomeric fibers having the same soft segments but with hard segments of poly(ethylenebibenzoate), poly(1,4-butylenebibenzoate) or poly(1,6-hexylenebibenzoate).

Abstract: A segmented copolyetherester elastomer has soft segments formed from 60-95% poly(ethylene oxide) glycol and 40-45% of a second poly(alkylene oxide)glycol, preferably poly(tetramethylene oxide) glycol, and hard segments formed from terephthalic acid and ethylene glycol or 1,4-butane diol, the hard segments amounting to 8-20% of the elastomer weight. The elastomer can be molded into soft, elastic objects and can absorb water amounting to at least 100% of its dry weight.

Abstract: A thermoplastic, segmented, linear copolyetherester elastomer of at least 70 weight percent soft segments, derived from poly(alkylene oxide) glycols and terephthalic acid, and hard segments constituting 10-30% of the elastomer and being 95 to 100% poly(1,3-propylene terephthalate). Melt-spun and drawn fibers of the elastomer have superior elastic and set properties versus comparable fibers made from such elastomers having hard segments of poly(ethylene terephthalate) or of poly(1,4-butylene terephthalate).

Abstract: A segmented thermoplastic copolyetherester having soft segments formed from a long chain polyalkyleneether glycol containing 80 to 97 mole percent of copolymerized tetrahydrofuran and 3 to 20 mole percent of a copolymerized cyclic alkylene oxide, preferably copolymerized 3-methyltetrahydrofuran, provides fibers and films with an improved combination of high tenacity, high unload power, high melting temperatures and low set.

Abstract: Elastomers are prepared from high molecular weight relatively rigid difunctional compounds and low molecular weight compounds selected from diacids, diols, diamines, hydroxyacids, hydroxyamines and aminoacids.

Abstract: Elastomers are prepared from high molecular weight relatively rigid difunctional compounds and low molecular weight aliphatic compounds selected from diacids, diols, diamines, hydroxyacids and aminoacids.

Abstract: Curable coating composition containing the film-forming ingredient consisting essentially of, with the sums of the parts by weight and the mole percentages being 100 and 100%, respectively:(1) about 55-95 parts by weight of a copolymer of(a) 20-70 mole % ethylene,(b) 20-60 mole % methyl methacrylate,(c) 1-15 mole % of a hydroxyalkyl ester of acrylic acid or methacrylic acid in which the hydroxyalkyl group contains 2-4 carbon atoms, and(d) 0-9 mole % of an .alpha.,.beta.-unsaturated carboxylic acid selected from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, 2-ethylacrylic acid, and 2-propylacrylic acid, or of maleic anhydride, and(2) about 5-45 parts by weight of a nitrogen-resin crosslinking agent.