Abstract: This invention is a method of manufacturing polyesters with excellent heat resistance and adhesiveness to rubber, characterized in that 0.2-5 weight percent epoxidized polybutadiene is reacted with a polyester composed of aromatic dicarboxylic acid and a glycol ingredient with a carbon number of 2-6, and the terminal carboxyl group quantity is made 15 grams equivalent per 10.sup.6 grams polymer or less.

Abstract: This invention is a method to improve retention of a finish on nylon yarn, said finish containing the reaction product of epichlorohydrin with the reaction product of pyromellitic dianhydride with a long chain fluoroalcohol, comprising polymerizing said nylon in the presence of about 0.5 to 1 mole percent of a primary-tertiary diamine of the structure ##STR1## where R.sub.1 is an alpha, omega-alkylene group of 2 to 10 carbon atoms where cycloaliphatic, R.sub.2 and R.sub.3 are alkyl radicals of 1 to 4 carbon atoms, R.sub.4 is an alkylene radical of 1 to 10 carbon atoms and R.sub.5 is R.sub.4 or arylalkyl, R.sub.6 is H or alkyl of 1 to 4 carbons, so that said nylon polymer is melt stable. Also, for batch processing, polyethyleneimines of 300 to 1200 molecular weight, methylaminobispropylamine, N-(2-aminoethyl)-1,3-propanediamine, and 3,3'-iminobispropylamine are useful.

Abstract: This invention is a method to recover caprolactam from a combined stream of mother liquor from a caprolactam crystallizer and other lactam containing aqueous streams, the improvement comprising steam distilling the combined stream at a temperature of from between about 180.degree. C. to 235.degree. C. in the absence of any depolymerization agent such as phosphoric acid; so that the residue from the steam distilling remains fluid; relatively low levels of caprolactam remain in the residue; less residue is generated; the recovered caprolactam has improved high quality; and losses of caprolactam due to side reactions are reduced.

Abstract: Carpet underlaying comprising perforated nylon film bonded to pad, provided for slippage between the carpet and the pad during installation, and minimal noise when the carpet is walked on.

Abstract: The present invention is a composition comprising a polyterpene resin and at least two low molecular weight polyolefins as discussed below. The polyterpene resin preferably has a melting point of from about 60.degree. C. to about 150.degree. C. The composition contains from 15 to 40% based on the weight of the polyterpene resin of at least two polyolefin polymers selected from the group consisting of polyethylene homopolymers, polyethylene copolymers and oxidized polyethylene. There is at least one polymer selected from the group of copolymers and oxidized polyethylene.

Abstract: This invention is a nylon fiber useful for improved comfort for wearers of apparel fabric made therefrom comprising (a) from about 5 to 15 percent by weight of poly (N,N-dimethylacrylamide) having a molecular weight which in a 25% aqueous solution gives a viscosity of from about 20 to 1 000 centipoise (0.02 to 1.0 Pa.s) at 25.degree. C. and (b) correspondingly from about 85 to 95% by weight nylon.

Abstract: A linear saturated polyester, such as polyethylene terephthalate containing from 0.1 percent to 20 percent of an amine carboxylate salt. The salt can be tertiary or a quaternary carboxylate salt.

Abstract: A method of rotationally molding a multi-layered article. The outer layer is first rotationally molded and solidified. An inner polymer layer is fed into the mold cavity and an inner layer is rotationally molded to the inner surface of the outer layer. Preferably, the outer layer and inner layer are thermoplastics. The outer layer polymer has a melting point higher than the inner layer polymer. The outer layer is rotationally molded and cooled to below its melt temperature but above the melt temperature of the inner layer polymer. The inner layer is then rotationally molded while the outer layer remains solid.

Abstract: This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of aromatic dicarboxylic acid and the glycol component of 2-6 carbons and being in the molten state with 0.1-5 weight percent of molten 2,2'-1,3-phenylene-bis(2-oxazoline) to reduce the amount of end carboxyl group in the polyester to below 15 g equivalents per 10.sup.6 g of the polymer.

Abstract: The aqueous, liquid composition, the method of preparation of the composition, and the method of use of the composition as a temporary coating. The composition comprises water, a copolymer of ethylene and an alpha,beta-ethylenically unsaturated carboxylic acid having a number average molecular weight of from about 500 to 5000 and an acid number of at least 100 milligrams of potassium hydroxide necessary to neutralize one gram of copolymer. There should be a sufficient amount of a base which is preferably volatile, to form a clear, aqueous liquid composition.

Abstract: About equimolar ethylene/chlorotrifluoroethylene copolymer compositions are stabilized against thermal degradation by incorporating therein a stabilizing system comprising (a) a phosphite of an organic plyhydric phenol; (b) a salt of a carboxylic acid and a metal of Group II of the Periodic Table; and (c) an ester of a (4-hydroxy-5-alkylphenyl)alkanoic acid.

Abstract: This invention is a method of treating polyester material for use in reinforcing rubber, the method being characterized by treating the polyester material with a treating liquid containing an epoxy compound and a melamine compound and subsequently heat treating the material at 100.degree.-250.degree. C.

Abstract: This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of aromatic dicarboxylic acid and the glycol component of 2-6 carbons with 0.3-5 weight % of the N-glycidylisocyanuric acid compound containing 1-2 N-glycidyl groups to reduce the amount of end carboxyl groups to less than 15 g equivalents per 10.sup.6 of the polymer.

Abstract: Thin polymer films containing small sized platelet type filler. The polymer has a melt index of from 0.01 to 10 grams per 10 minutes at 190.degree. C. to 250.degree. C. as measured on ASTM Test No. D-1238 at a load of 1000 to 2160 grams. The preferred polymer is polycaprolactam or high density polyethylene. There is from 10 to 50 percent of a platelet filler having an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of about 25 micrometers, and an average thickness of less than 0.5 micrometers. The preferred filler is talc. The film is from 10 to 100 micrometers thick and can be a single ply or a laminate.

Abstract: The present invention is a flame retardant composition comprising from 5 to 20 weight percent of a homopolymer of a monomer having the formula: ##STR1## wherein n=0 or 1, X is bromine or chlorine and R is hydrogen or methyl. The polymer has a molecular weight between 1.times.10.sup.3 and 10.times.10.sup.6, and preferably 5.times.10.sup.3 to 5.times.10.sup.6. The molecular weight is determined by gel permeation chromatography in tetrahydrofuran. The composition contains from 80 to 95 weight percent of a polyamide. There can be from 0 to 10, preferably 1 to 10, and more preferably 2 to 6 weight percent of antimony oxide. Optionally, the composition can contain an impact modifier and/or a filler.

Abstract: This invention is a method of making heat-resistant polyester, the method being characterized by reacting the polyester consisting of the aromatic dicarboxylic acid and the glycol with 2-6 carbons with 0.1-5 wt % of the bifunctional epoxy compound expressed by the general formula ##STR1## (R is hydrocarbon group; it may be substituted) to reduce the amount of end carboxyl group to less than 15 g equivalents per 10.sup.6 g of the polymer.

Abstract: A method and apparatus for removing fluid and cooling the wad of textured yarn on the barrier screen of a moving cavity texturing jet by deflecting the hot fluid (such as steam) away from the underside of the screen with rotating turbine blades and by drawing ambient air across the screen with a vacuum line under the screen has been discovered.

Abstract: A hollow, enclosed, seamless polymeric article. The article has an outer wall having an outside surface and an inside surface. There is at least one baffle within the article. There is a means to sealingly connect the baffle to the outer wall inside the article. The means to sealingly connect the baffle can sealingly connect the baffle to the inside surface of the outer wall or through the inner surface into the outer wall.

Abstract: A method of forming an amorphous crystallizable thermoplastic polymer composition. The polymer composition has a modulus of rigidity which decreases to a minimum value with increasing temperature and then begins to increase. The process includes heating polymer to below a temperature at which crystal formation occurs and form the polymer. The polymer composition is then heated to a temperature at which crystal formation can occur and be annealed. This process is useful to make articles having a thickness of from 0.127 cm (0.050 inches) to 1.27 cm (0.50 inches) such as sheets and tubes of the amorphous polymer and then reforming and annealing them.

Abstract: This is an improved apparatus and process for stretching a tow of filaments by the tension caused by driven rolls dragging the tow across drag rolls. The improvement comprises continuously controlling at least one undriven or drag roll proportional to the sensed variation in a ratio of speed between at least one driven roll and at least one drag roll.