Abstract: A particulate, free-flowing and rapid dissolving polymer composition is prepared by comminuting a high molecular weight thermoplastic or viscoelastic polymer at a temperature below its glass transition temperature while maintaining the polymer in an inert environment. A finely divided, solid coating agent is mingled with the comminuted polymer while maintaining the polymer particles in a cold and inert atmosphere. The particles of coating agent form a protective shell around each polymer particle by tumble mixing the components while raising the temperature of the mixture. The polymer composition finds use as a drag reducing agent; as an anti-misting agent; to enhance the efficiency of oil skimming processes and devices; and for the preparation of polymer solutions for other uses.

Abstract: An epoxy resin composition comprising a trifunctional epoxy resin derived from a trisphenol having the structure represented by the following general formula ##STR1## wherein R represents a hydrogen atom, an alkyl group or a halogen atom, and a novolak-type phenolic resin. This epoxy resin composition gives a cured product having excellent pliability and a high glass transition temperature. It is especially useful as a semiconductor encapsulating material.

Abstract: A new class of polyhydroxypolyamides is disclosed. The polyhydroxypolyamides, useful as fibers, plastics, coatings and adhesives, are characterizied by the repeating structural unit--CO--(CHOH).sub.x --CO--NHCH.sub.2 --(CR.sup.1 H).sub.y --CH.sub.2 NH].sub.nwhere R.sup.1 and R.sup.2 are the same or different and are hydrogen, C.sub.1 -C.sub.50 alkyl, C.sub.2 -C.sub.50 alkenyl or C.sub.7 -C.sub.50 aralkyl; x is an integer of 1 to 6; y and z are the same or different and are 0 or an integer of 1 to about 30; and n is an integer of at least about 10.A process for making these polyhydroxypolyamides is also taught. It includes the steps of reacting an aldaric compound, said compound selected from the group consisting of a diacid, an acid-lactone, a dilactone and mixtures thereof, with an alkanol to form an esterification product and forming the polyhydroxypolyamide by polymerizing the esterification product with a primary amine in a polar solvent.

Abstract: This invention relates to a process for producing a printing-ink stock. According to the invention, a solid and oxidation-sensitive thermoplastic resin binder and a pigment are supplied to an extruder and combined therein to form a pigment dispersion. In an end zone of the extruder and/or shortly after discharge from the extruder, a liquid diluent is added to the pigment dispersion to produce a more or less viscous, liquid, stabilized product. The invention also relates to a printing ink produced from the product so obtained.

Abstract: A linear rodlike polyester of controlled rigidity and packing density which melts below 350.degree. C. and consists essentially of recurring units of the formula (1) ##STR1## in which A, B, C and D are the same or different cyclic moieties selected from the group consisting of 1,4-phenylene and 1,4-cyclohexylene; n is Zero or 1; Z.sup.1, Z.sup.2 and Z.sup.3 are the same or different and are selected from the group of bivalent links consisting of the covalent bond (--) and of linkages --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --OCH.sub.2 CH.sub.2 O--, --OCH.sub.2 OCH.sub.2 -- and --CH.sub.2 OCH.sub.2 O--; X.sup.1, X.sup.2, X.sup.3 and X.sup.

Abstract: An antistatic agent containing a cationic and/or amphoteric, water-soluble or water-dispersible and heat-reactive blocked urethane prepolymer as an essential component, said prepolymer having at least one cationic group and/or at least one amphoteric group in its molecule and having isocyanate groups blocked with a thermally dissociable blocking agent. The antistatic agent is applicable to various materials and can give the antistatic property with the water repellency, which can be kept for a long term, to the materials.

Abstract: High shrinkage polyester fibers having good strength and uniform dyeability are disclosed, along with a method of producing the high shrinkage polyester fibers, by drawing a feeder yarn having a birefringence (.DELTA.n) of at least 0.0175 at ambient temperature and carefully controlled draw ratios.

Abstract: The invention relates to absorbent compositions, to methods for handling and immobilizing particulate absorbents, and to absorbent articles produced from the absorbent compositions. Absorbent materials such as cross-linked, water-insoluble and water-swellable particulate polymers are immobilized and safely handled by adding thereto an aqueous liquid such as water or saline in amounts sufficient to form hydrates in which the water comprises from 20% to 80% by weight of the total hydrate. The hydrates may be extruded, sprinkled, or sprayed and can be incorporated into absorbent articles such as diapers and tampons by conventional means. The hydrates unexpectedly increase the total water absorbency of the absorbent on a dry basis.

Abstract: Disclosed herein are novel blocked isocyanate curing agents prepared by reacting meta-xylylene diisocyanate with a select group of ketoximes and curable compositions containing the same.

Abstract: Disclosed are polyesters containing repeating units from trans-4,4'-stilbenedicarboxylic acid and 1,6-hexanediol, the polyesters having an I.V. of at least 1.20, a tensile strength of at least 20,000 psi in 1/16-in. thick injection-molded bars, and a melt viscosity of 3000 poise or less at 265.degree. C. and a shear rate of about 107 sec.sup.-1.

Abstract: A composite material comprised of a thermoplastic resin matrix and a cellulosic fiber reinforcing material is prepared by reducing the water content of the fibers prior to exposure to the resin.

Abstract: Disclosed is a polyester vessel having mouth, side wall and bottom portions formed of a polyester composed mainly of ethylene terephthalate units, wherein the thermoplastic polyester is a polyester containing a catalyst residue in an amount smaller than 1000 ppm as the metal, and in the thermoplastic polyester constituting the bottom portion of the vessel, the ratio of the thermal crystallization degree represented by the following formula:100.times.(Q.sub.DC -Q.sub.AC)/Q.sub.DC (1)wherein Q.sub.AC stands for the heat quantity of crystallization at elevation of the temperature and Q.sub.DC stands for the heat quantity of crystallization at lowering of the temperature, is lower than 90%.

Abstract: A process for the production of oligourethanes containing terminal mercapto groups in which the adduct of propylene oxide with trimethylol propane and/or glycerol and/or trimethylol ethane as alkylene oxide adduct containing OH-groups is reacted with isomeric tolylene diisocyanates in excess, based on hydroxyl groups, and the isocyanate groups are further reacted with mercaptoethanol. The adduct of propylene oxide with the trifunctional alcohol is intended to have a calculated molecular weight of from about 1800 to about 6000 and preferably of from about 2000 to about 5000, the reaction products being used for the production of sealing compounds hardening by oxidation or as an additive for crosslinkable epoxy resin systems.

Abstract: Methods for rapidly curing flexible polyether-derived foam in situ by adding to the foam forming composition an ammonia containing material having a decomposition temperature below the temperature of the highest reaction exotherm of the foam-forming composition and decomposing the ammonia containing material by exposure to the heat of the exotherm produced by reaction of the foam-forming components to release ammonia to cure the foam by contact therewith.

Abstract: A process for producing a linear polyester comprising a main structural unit of an aromatic dicarboxylic acid ester of an alkylene glycol, particularly, comprising a polyethylene terephthalate or polytetramethylene terephthalate unit, is provided. In the process of the invention, the polycondensation reaction is conducted in the presence of a niobic acid catalyst that is obtained by heat-treating a hydrated niobium compound at the temperature range between 80.degree. C. and 400.degree. C. The process of the invention is also effecitvely applied to the manufacture of an elastomeric polyester comprising a polyalkylene terephthalate as a hard segment and a polyalkylene glycol as a soft segment.

Abstract: The invention provides an odor neutralizing composition comprising:(a) a complexing agent selected from a polymer of the formula (1) ##STR1## in which R is a substituted or unsubstituted alkylene group having up to 12 carbon atoms in the unsubstituted chain.(b) a carrier capable of assisting wetting of odor forming compositions; and(c) a cationic moiety; said moiety being part of a chemically independent compound, or chemically associated with a complexing agent or the carrier.

Abstract: The invention provides an ointment composition for treating skin irritations such as diaper rash and decubitus. The composition includes zinc oxide, boric acid, karaya gum, peruvian balsam, cod liver oil and an appropriate solvent and pharmaceutical carrier.

Abstract: Porous inorganic particles, such as silica gel particles, modified with amino-containing groups and carboxyl-containing groups are disclosed. The modified porous particles, useful as packing materials for column chromatography, are obtained by a method including the steps of providing porous, amino group-carrying, inorganic particles, and converting a portion of the amino groups into carboxyl-containing groups.

Abstract: A shrinkable film for packaging excellent in the heat-sealing property and the shrinking property is disclosed. This shrinkable film is obtained by stretching a film of a mixture comprising 100 to 30 weight parts of a crystalline polyester (A), which comprises mainly terephthalic acid and 1,4-cyclohexane dimethanol and has a heat of crystalline melting of not less than 3 cal/g and a melting point in the range of 200.degree. to 310.degree. C., and 0 to 70 weight parts of a polyester (B) comprising terephthalic acid and/or 2,6-naphthalene dicarboxylic acid as the dicarboxylic acid constitutional unit and ethylene glycol and/or 1,4-butylene glycol as the glycol constitutional unit. The mixture of the polyester (A) and polyester (B) has a good handling property in drying. The shrinkable film for packaging of the present invention can be produced without any difficulty in drying and shows the ratio of shrinkage of 40 to 90% after 5-minute heat treatment at 100.degree. C.

Abstract: An improved method of stabilizing a polyoxymethylene copolymer, which comprises(1) heat-melting a crude copolymer of trioxane and a cyclic ether and/or a cyclic acetal to form a first stabilized copolymer having a decomposition ratio (D.sub.220.sup.60), determined when it is heated at 220.degree. C. for 60 minutes in vacuum, of up to 2% by weight, and then(2) bringing the first stabilized copolymer into contact with steam containing 0.01 to 5% by weight of a basic compound at a temperature of at least 100.degree. C. but not exceeding the melting point of the copolymer to form a second stabilized copolymer.