Abstract: Polyester fibers are dissolved and solid linear polyester polymer recovered for use in the production of new linear polyester products, particularly polyester fibers or filaments, by the process of dissolving the fibers in a non-depolymerizing dissolution solvent for polyester characterized by inclusion of carbocyclic rings in its structural formula under dissolution conditions for polyester polymer; thereafter quenching the polyester solution; and separating the solid polyester from the solution.

Abstract: A process for the preparation of a soluble fraction of soya proteins which comprises at least partially extracting the proteins present in soya in aqueous medium at a pH value below the isoelectric point of soya proteins to obtain an acid extract of soya proteins, and neutralizing the acid extract in a time of less than about 60 seconds by the addition of alkali in a concentration of higher than about 0.1 N.

Abstract: An accelerated melamine-aldehyde resin is made by mixing about 0.001 to about 2% of a free-radical generator into the resin. A laminate is made by preparing a composition of an aldehyde and melamine in a mole ratio of about 1.5 to about 2.0, adjusting the pH of the composition to about 7 to about 9, heating the composition until a sample of it produces a positive hydrophobe in ice water, mixing about 0.001 to about 2% of a free-radical generator and up to about 80 phr of a solvent into the composition, coating paper with the composition to a weight ratio of coated paper to uncoated paper of about 1.2 to about 2.5, drying the composition and partially curing the compositin, stacking the coated paper, and curing the stack under heat and pressure.

Abstract: A method which comprises drawing a part of the reaction liquid from a reactor for unsaturated polyesters, bringing the drawn liquid into contact and reaction with a gaseous starting material or a liquid starting material capable of being converted into vapor on reaction, for example, an alkylene oxide by means of tubular mixing and recycling this reaction liquid to the reactor thereby preventing increase in pressure of the reactor. An apparatus which comprises a reactor having a confined or open structure, a tubular mixer where a part of the reaction liquid drawn from the reactor is mixed with a gaseous starting material or a liquid starting material capable of being converted into vapor on reaction, which is blown through a nozzle, to cause a vapor-liquid reaction, and a liquid circulation pump for supplying the liquid drawn from the reactor to the tubular mixer and recycling the vapor-liquid reaction product to the reactor.

Abstract: Molding compositions having an oxygen index of greater than 0.30 based on high molecular weight aromatic polycarbonates containing 0.5-20% of organic fibers.

Abstract: Naphthalate polyester filaments, yarns or fibers consisting essentially of a naphthalate polyester which has an intrinsic viscosity of 0.3 to 3.5 and a softening point of at least 200.degree. C, and in which at least 85 mol% of the total recurring units consist of units of the formula ##STR1## wherein n is 4 or 6, and having at least one diffraction peak at a Bragg scattering angle 2.theta. = 16.3.degree. -- 16.7.degree. and/or 2.theta. = 25.3.degree. - 25.8.degree. in their X-ray diffraction. These filaments, yarns or fibers are useful especially as an electrically insulating material, an elastomeric reinforcing material, a fluid filter material, a paper-making canvas and a fastener component material.Of these, filaments, yarns or fibers of poly(tetramethylene 2,6-naphthalate) are prepared by melt-spinning the polymer thereby to form undrawn filaments having a birefringence of at lest 0.01 and a density of not more than 1.

Abstract: A recording material comprising a support having coated thereon a layer of a photopolymerizable composition comprising (a) a chlorinated polyolefin, (b) a monomer having at least one addition-polymerizable unsaturated bond, (c) a photo-polymerization initiator, and (d) a polymeric material having a molecular weight above about 10,000 is described. This recording material is suited for use as a photoresist material, particularly for tenting.

Abstract: A substantially linear segmented copolymer of the formula (MX).sub.n where n is an integer greater than 0 and M is a bivalent organic radical segment of the formula ##STR1## wherein R is hydrogen, C.sub.1 to C.sub.4 alkyl, aryl, or C.sub.1 to C.sub.4 alkyl substituted aryl; A is C.sub.1 to C.sub.4 alkylene; A' is C.sub.1 to C.sub.4 alkylene the same or different than A, phenylene or alkyl substituted phenylene; and y is an integer greater than 0; and X is a bivalent organic radical segment of the formula ##STR2## WHEREIN G is a long chain radical segment of recurring linkages selected from the group consisting of ester and ether; and z is an integer greater than 0 the same or different than y.

Abstract: An unsaturated polyester resin composition comprises a mixture of a particular unsaturated polyester, an unsaturated monomer copolymerizable with the unsaturated polyester and polystyrene having a certain particle size in specific amounts. The unsaturated polyester is a reaction product of a dicarboxylic acid component containing .alpha.,.beta.-unsaturated dicarboxylic acid with a glycol component containing certain amounts of neopentyl glycol and 2,2-bis(4-hydroxycyclohexyl) propane. The resin composition exhibits favorable properties such as low shrinkage upon curing, good colorability and good storage stability, and is useful particularly in formulating premixed molding compounds.

Abstract: A method for reclaiming rubber in which the scraps to be reclaimed are treated in an autoclave at a temperature which is always below the temperature at which the scraps had been cured, with continuous agitation and under the pressure of a fluid (such as air) fed to the autoclave at the ambient air temperature. The processing time is a function of the other parameters and can easily be determined experimentally depending upon the nature of the material to be reclaimed and the plasticity to be obtained.

Abstract: Novel one component shelf stable low shrinkage structural adhesive systems having controlled viscosity which cure at ambient temperatures in the absence of oxygen and at elevated temperature in the presence or absence of oxygen, with minimal dimensional change are disclosed. These adhesive systems comprise polymerizable vinyl ester polymers prepared by vinyl ester termination of certain polymerizable epoxy resins with methacrylic or acrylic acids, and also polyesters, a chemically compatible ethylenically unsaturated organic liquid monomer particularly styrene, and a catalyst/inhibitor system containing a peroxide type polymerization initiator, accelerators and inhibitors as well as, optionally, thixotropic agents, thickeners, dyes, pigments and other additives which will impart specifically desirable use properties. They are also of value as sealants where high performance is required.

Abstract: The disperse dyeability of a fiber or film forming polyester resin is improved by dispersing substantially uniformly in a polyester resin in which it is at least partially soluble a compound having the formula ##STR1## wherein R is benzyl or phenethyl, R.sub.1 is ethylene or propylene, R.sub.2 is hydrogen or lower alkyl and M is an alkali metal.

Abstract: Polymerizable molding compositions having excellent pigmentability and dimensional stability comprise:A. polymerizable polyester component andB. an additive component comprising discrete particles of less than about 50 microns diameter of a cross-linked acrylate polymer having a glass transition temperature of below about 75.degree. Celsius and which is chemically inert with respect to the polyester component and is swellable but insoluble therein. The additive component comprises the lightly cross-linked reaction product of at least one monofunctional acrylate monomer and at least one polyfunctional acrylate monomer.

Abstract: Thermally stabilized thermoplastic segmented copolyester of recurring short chain ester units and long chain ester units joined through ester linkages, having a melt index of less than 150 and a melting point of at least 90.degree. C., an inherent viscosity in the range of 1.0 to 1.7 and an acid number not greater than 3, stabilized with 0.05 to 3.0 percent by weight, based on the weight of copolyester, of an alkaline earth oxide. Improved stabilizing effect can be achieved when 0.25 to 2.5 percent by weight, based on the weight of copolyester, of the alkaline earth oxide is used in conjunction with 0.25 to 2.5 percent by weight, based on the weight of copolyester, of a substantially linear polycarbodiimide. Additional optional materials that can be added with the stabilizer, based on the weight of copolyester, include: 0.25 to 5.0 percent by weight of a compound taken from the group consisting of hindered phenols, nitrogen-containing hindered phenols and hindered secondary amines; 0.25 to 5.

Abstract: This invention relates to thermoplastic polycarbonate molding materials having improved flame resistance and hydrolysis resistance. These materials comprise intimate blends of aromatic high molecular weight polycarbonates and about 0.5 to 50 wt. % of polyphenylene sulphides. This invention also relates to a process for improving the flame resistance and hydrolysis resistance of aromatic polycarbonates by intimately blending them with about 0.5 to 50 wt. % polyphenylene sulphide.

Abstract: Active polymeric matrices, xerographic elements and a process for obtaining the monomer and polyester material by reacting an aldehyde of a desired polycyclic aromatic compound with a dicarboxy acid ester in the presence of a base to obtain an unsaturated dicarboxyester intermediate; cyanating the intermediate in the presence of alcohol to obtain a saturated B-cyano monocarboxy acid ester which is hydrolyzed to the .alpha., .beta. dicarboxy intermediate and then esterified to obtain the .alpha., .beta. dicarboxy ester monomer. This monomer is catalytically polymerizable with a polyhydroxy alcohol such as a glycol to obtain the polyester.

Abstract: A prosthetic device having at least part of the surface thereof made of a material having a surface energy, as hereinbefore defined, in the range 50 erg cm.sup.-2 to 100 erg cm.sup.-2, for example, made of a plastics material which is a copolymer comprising repeat units having the structure --CH.sub.2 --CH.sub.2 --O-- and other units capable of stabilizing the copolymer in water, the copolymer comprising at least 10% by weight of units having the structure --CH.sub.2 --CH.sub.2 --O-- and no more than 95% by weight of said units.

Abstract: Carbonate-modified copolyesters which are suitable for the production of mouldings by injection moulding or for the production of pipes, films and fibers by extrusion, can be obtained by reacting aromatic dicarboxylic acids or their ester-forming derivatives and carbonic acid esters of dihydric aliphatic alcohols which have carbonic acid ester groupings in the molecule and hydroxyalkyl end groups.

Abstract: The invention relates to photopolymerizable polymeric compositions useful as coating and moldable compositions which are hardenable by ultraviolet radiation. These coating and moldable compositions comprise mixtures of photopolymerizable or photocrosslinkable unsaturated compounds and at least one photoinitiator selected from the group consisting of halogenated heterocyclic compounds having at least one diazole or triazole group and at least one benzyl halide group.

Abstract: This invention relates to compositions of the formula: ##STR1## WHEREIN N IS 0 TO 2 AND AT LEAST 1 AND NOT MORE THAN 2N + 2 OF THE A groups are ester radicals of the structure ##STR2## wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and at least 2 and not more than 2n + 3 of the A groups are ester radicals of the structure ##STR3## wherein m is 0 to 1. The composition is formed by reacting one mole of a mono, di- or tri-pentaerythritol of the formula: ##STR4## WHEREIN N IS 0-2 WITH 2N + 4 MOLES OF A MIXTURE OF MONOCARBOXYLIC ACIDS FROM THE GROUP CONSISTING OF (A) AT LEAST 1 AND NOT MORE THAN 2N + 2 MOLES OF RCOOH wherein R is a straight chain or branched, saturated or unsaturated hydrocarbon radical containing 11 to 19 carbon atoms and (b) at least 2 and not more than 2n + 3 of HSCH.sub.2 (CH.sub.2).sub.m COOH wherein m is 0 to 1.