Abstract: A composition comprising a thermoplastic resin, a mold release agent and a mold release enhancing effective amount of a fatty acid.

Abstract: An initially erasable ink composition for a ball point writing instrument which ink is characterized by its initial erasability by ordinary pencil erasers when applied by a ball point writing instrument to an absorbent paper-like writing surface and which thereafter develops permanence. The ink composition comprises polar elastomers, such as butadiene/acrylonitrile copolymer rubbers and vinyl acetate/ethylene copolymer rubbers, and mixtures thereof, either alone or in admixture with cis-1, 4-polyisoprene (natural rubber or synthetic nature rubber), pigment, and a solvent system. The polar elastomer is present in the range of about 14-25% by weight of the ink and the pigment is present in amount sufficient to impart color and intensity to a trace of the ink when applied to a substrate such as paper. The solvent system essentially comprises a volatile component having a boiling point less than about 180.degree. C.

Abstract: Acrylonitrile is a monomer that is widely used in the production of a vast variety of polymers. Undesirable quantities of residual unpolymerized acrylonitrile are often present in polymers. The residual or free acrylonitrile in polymers can be reacted with certain thiols in order to reduce their content in the polymer. In the reaction between these thiols and acrylonitrile products are formed which exhibit antioxidant ability.

Abstract: A composition comprising a thermoplastic resin and a mold release effective amount of an olefin.

Abstract: Acrylonitrile polymer film is treated with non-volatile water-miscible glycol plasticizer to improve toughness and other film properties. In a unique, continuous, steady state process polyacrylonitrile aquagel strip is treated with plasticizer additive in concentrated aqueous solution. Aquagel strip is passed at substantially constant rate through a solution treatment bath. The aquagel strip, which may contain at least about 40 weight % water uniformly dispersed in the polyacrylonitrile, is contacted with the aqueous solution during a predetermined residence time in the bath. After passing the treated aquagel strip from the bath, excess aqueous additive solution is removed. The plasticizer additive can be metered to the aqueous solution at concentration greater than the aqueous additive solution of the bath at a rate substantially proportionate to desired steady state uptake of additive for the aquagel strip.

Abstract: The physical properties of a nitrile barrier resin, particularly the tensile modulus, heat distortion temperature and processability, are improved by including therein a carboxylic acid processing aid and an alkaline filler material.

Abstract: A plasticized polyacrylonitrile composition and a film thereof containing a plasticizing proportion of a liquid polyether prepared by reacting ethylene oxide and propylene oxide with at least one monohydric alcohol active hydrogen compound initiator having about one to about ten aliphatic carbon atoms to yield a heterized copolymer. The invention is also concerned with a continuous process for the introduction of the plasticizing proportion of said liquid polyether into the polyacrylonitrile aquagel film.

Abstract: Process for preparation of monodispersed crystalline particles from amorphous crystallizable polymers. In this process, an amorphous polymer of an inorganic glass, such as selenium, or of organic polymer, such as a polyester, is initially contacted with a crystal inducing fluid under certain specified conditions. Concurrent with such contact the crystallizable polymer is subjected to physical and/or ultrasonic forces. This combination of steps results in the substantially complete conversion of the amorphous polymer to monodispersed crystalline particles. In the case of crystallization of amorphous selenium, this process is directive for preparation of the corresponding triclinic crystalline form of this material.

Abstract: Compositions having internal mold-release properties comprise a molding polymer and an oxidation stable polyoxyalkylene lubricant compound used alone or in combination with other polyoxyalkylene compounds.

Abstract: The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted into a joint gap or other gap of structural members to stop water at the gap.

Abstract: Substantial improvement in the heat stability of rigid plastic products, such as polyvinyl chloride, is obtained by incorporating therein glyceryl monostearate having less than 4% contained glycerine.

Abstract: Styryl compounds represented by the following general formula (I): ##STR1## wherein X.sub.1 is a halogen atom or a lower alkyl or lower alkoxy group, X.sub.2, Y.sub.1 and Y.sub.2 are each a hydrogen or halogen atom or a lower alkyl or lower alkoxy group, R.sub.1 and R.sub.3 are each an unsubstituted or substituted alkyl group, and R.sub.2 is a straight or branched C.sub.3 -C.sub.10 alkylene group or an alicyclic hydrocarbon-containing alkylene group, a process for producing them, a process for dyeing and printing hydrophobic fibers by their use and a process for coloring synthetic resins by their use. According to said processes a clear yellow color of high fastness can be given to the fibers and synthetic resins.

Abstract: A flowable polymeric extrusion powder consisting essentially of acrylonitrile polymer particles is provided at low temperature treated with a non-sticking amount of solvent. Sufficient solvent can be added to dissolve the polymer at elevated temperature, for instance, more than 120 parts by weight of dimethyl sulfoxide solvent can be added per hundred parts of dry polymer below ambient temperature.