Abstract: Thermoplastic molding compositions having improved flexibility and cold impact strength, comprising a mixture of:I. at least one polyamide from omega-aminocarboxylic acids or lactams having at least 10 carbon atoms; andII. at least one polyether ester amide with units of the starting components randomly distributed in the polymer chain produced from:(a) omega-aminocarboxylic acid or lactams having at least 10 carbon atoms,(b) alpha, omega-dihydroxy(polytetrahydrofuran) having a molecular weight of between 160 and 3,000 and(c) a dicarboxylic acid.The mixture contains about 95 to 20 percent by weight of component I and about 5 to 80 percent by weight of component II.

Abstract: In a process for preparing high molecular weight poly-(ethylene terephthalate) in two stages, comprising, in the first stage, reacting a dialkyl ester of terephthalic acid with ethylene glycol in the presence of 35 to 290 ppm of manganese, in the form of a manganese-II salt effective as a catalyst, together with 6 to 95 ppm of cobalt, in the form of a cobalt-II salt effective as a catalyst, at a temperature of 170.degree. to 220.degree. C. to give a low molecular weight precondensate; then adding 45 to 140 ppm of phosphorus in the form of a phosphorus compound effective to minimize discoloration of the product poly-(ethylene terephthalate) due to said transesterification catalysts; and, in the second stage, effecting complete condensation of the precondensate thus obtained, in the presence of catalysts at a temperature of 270.degree.-290.degree. C.

Abstract: Method for preparing and using thermoplastic polyether ester amides with units of the starting components randomly distributed in the polymer chain. A mixture of:I. one or more polyamide forming compounds from the group of the omega-aminocarboxylic acids and/or lactams having at least 10 carbon atoms;II. an alpha, omega-dihydroxy-(polytetrahydrofuran) having an average degree of polymerization of between about 2 and 42 or a molecular weight of between 160 and 3,000; andIII. at least one organic dicarboxylic acid is heated in a weight ratio of I to (II+III) of between 30:7 and 98:2. In (II+III) the hydroxy and carboxy groups are present in equivalent amounts. The heating takes place in the presence of 2-30% by weight of water, based on the polyamide-forming compounds of component I, under the internal pressure attained in a closed container at temperatures of between 230.degree. and 300.degree. C. Water is removed as steam and after removal of the water, the product is further treated at 250.degree.-280.

Abstract: Polylaurolactam powder coating compositions for the coating of metals at high temperatures are obtained by grinding low molecular weight and brittle polylaurolactam with subsequent condensation by heating of the powder to temperatures of below its melting point.A. For the production of pigment free polylaurolactam powders, the low molecular weight granules are ground at temperatures of between 0.degree. and 45.degree. C. which have a relative viscosity of between 1.25 and 1.45 (measured in a 0.5 percent mecresol solution at 25.degree. C.) and have been produced by the polymerization of laurolactam in the presence of 2-10 percent by weight of water, 0.3-0.7 percent by weight of phosphoric acid at temperatures of between 265.degree. and 300.degree. C. in the absence of chain stabilizers under internal pressure, with subsequent granulating, and extraction between 25.degree. and 70.degree. C. with methanol or ethanol. The subsequent condensation is conducted at temperatures of between 140.degree. C.

Abstract: Powder coating compositions, for coating metallic surfaces at high temperatures, comprising saturated, high-molecular thermoplastic copolyesters obtained by the condensation of terephthalic acid and other dicarboxylic acids with 1,4-butanediol and, optionally, other diols, and conventional auxiliary agents and additives.

Abstract: Cyclic esters of dodecanedioic acid with aliphatic diols of 2-12 carbon atoms in the chain and substituted by up to two alkyl of 1-4 carbon atoms, are produced by thermolysis of corresponding linear polyesters under reduced pressure in the presence of catalysts by subjecting the linear polyesters to thermolysis at temperatures between 200.degree. and 300.degree. C., and by utilizing as catalyst a tin(II) salt of an aliphatic monocarboxylic acid of up to 18 carbon atoms, of an aromatic or araliphatic monocarboxylic acid of up to 36 carbon atoms, of an aliphatic or aromatic hydroxy-, poly-, ketocarboxylic acid or of a dicarboxylic acid of up to 18 carbon atoms; or a mixture of an organotin compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl of 6-36 carbon atoms, and an O,O-dialkyl-(3,5-di-tert.-butyl-4-hydroxybenzyl)-phosphonate wherein each alkyl is of 2-18 carbon atoms.

Abstract: Polylaurolactam powder coating compositions for the coating of metals at high temperatures are obtained by grinding low molecular weight and brittle polylaurolactam with subsequent condensation by heating of the powder to temperatures of below its melting point.A. for the production of pigment free polylaurolactam powders, the low molecular weight granules are ground at temperatures of between 0.degree. and 45.degree. C. which have a relative viscosity of between 1.25 and 1.45 (measured in a 0.5 percent m-cresol solution at 25.degree. C.) and have been produced by the polymerization of laurolactam in the presence of 2 - 10 percent by weight of water, 0.3 - 0.7 percent by weight of phosphoric acid at temperatures of between 265.degree. and 300.degree. C. in the absence of chain stabilizers under internal pressure, with subsequent granulating, and extraction between 25.degree. and 70.degree. C. with methanol or ethanol. The subsequent condensation is conducted at temperatures of between 140.degree. C.

Abstract: A process for the production of pol-(butylene terephthalate) of sufficiently high molecular weight for subsequent extrusion processing without the need of a solid phase post-condensation and at polycondensation pressures greater than now in general use. Polycondensation is carried out in the presence of small amounts of copolymers of an .alpha.-olefin or styrene with free or esterified maleic acid or anhydride.

Abstract: Cyclic esters of dodecanedioic acid with aliphatic diols of 2-12 carbon atoms in the chain and substituted by up to two alkyl of 1-4 carbon atoms, are produced by thermolysis of corresponding linear polyesters under reduced pressure in the presence of catalysts by subjecting the linear polyesters to thermolysis at temperatures between 200.degree. and 300.degree. C., and by utilizing as catalyst a tin(II) salt of an aliphatic monocarboxylic acid of up to 18 carbon atoms, of an aromatic or araliphatic monocarboxylic acid of up to 36 carbon atoms, of an aliphatic or aromatic hydroxy-, poly-, ketocarboxylic acid or of a dicarboxylic acid of up to 18 carbon atoms; or a mixture of an organotin compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl of 6-36 carbon atoms, and an O,O-dialkyl-(3,5-di-tert.-butyl-4-hydroxybenzyl)-phosphonate wherein each alkyl is of 2-18 carbon atoms.

Abstract: An improvement in the process of melt spinning ethylene terephthalate polyester to produce textile fibers with decreased pilling in the threads, fibers or fabrics made therefrom. The ethylene terephthalate is melt polymerized in the presence of a condensation catalyst to a final temperature of about 250.degree.-300.degree. C and a final pressure of less than 10 mm mercury to form an anhydrous melt. A vinyl copolymer having more than two carboxyl and/or hydroxyl groups is added to the melt polymerization at a concentration of about 0.005 to 2.0 percent referred to the dicarboxylic acid component. Melt spinning of the modified polyester is then carried out. The vinyl copolymer has the following general formula- ##STR1## where N IS AN INTEGER FROM 10 TO 10,000;a is zero or an integer from 1 to 100;b is an integer from 1 to 100;R.sup.1 through R.sup.6 are hydrogen, an alkyl group with 1 to 3 carbon atoms or an oxalkyl group -OR.sup.7 ;R.sup.

Abstract: Polylauryllactam having a low fisheye gel content, containing about 0.01 - 1.5 percent by weight of compounds of the general formula ##STR1## wherein Y is a sulfur or oxygen atom or an NH-group, based on the weight of polylauryllactam.

Abstract: An improvement in the process of melt spinning ethylene terephthalate polyester to produce textile fibers with decreased pilling in the threads, fibers or fabrics made therefrom. The ethylene terephthalate is melt polymerized in the presence of a condensation catalyst to a final temperature of about 250.degree.- 300.degree.C and a final pressure of less than 10 mm mercury to form an anhydrous melt. A substituted cyclobutanedimethanol, preferably 2,4-diphenyl-cyclobutanedimethanol-1,3, is added to the melt-polymerization at a concentration of about 0.05 - 5 mole percent of the substituted cyclobutanedimethanol component. Melt spinning of the modified polyester is carried out and the fibers are irradiated with high energy light.

Abstract: An improvement in the process of melt spinning ethylene terephthalate polyester to produce textile fibers with decreased pilling in the threads, fibers or fabrics made therefrom. The ethylene terephthalate is melt polymerized in the presence of a condensation catalyst to a final temperature of about 250.degree.C - 300.degree.C and a final pressure of less than 10 mm mercury to form an anhydrous melt. A substituted cyclobutanedecarboxylic acid, preferably .alpha.-truxillic acid, is added to the melt-polymerization at a concentration of about 0.05-5 molepercent of the acid component. Melt spinning of the modified polyester is carried out and the fibers are irradiated with high energy light.

Abstract: Polylauryllactam low in fisheye gel content polymerized at temperatures ranging from about 260.degree. to 340.degree.C and in the presence of water and possibly in the presence of monocarboxylic acids having 2-18 carbon atoms or polycarboxylic acids having 2-12 carbon atoms as chain regulators, under pressure and with removal of the water, and possibly with post-condensation at temperatures ranging from about 200.degree. to 300.degree.C, wherein 2-hydroxyphenylbenzoxazole is added to the molten, lauryllactam monomer in such amounts that the polylauryllactam contains from about 0.05 to 1.5 percent by weight of 2-hydroxyphenylbenzoxazole.