Abstract: A water-in-oil emulsion polymerization process is provided for preparing water-in-oil latexes of water-soluble polymers of ethylenically unsaturated monomers. The process utilizes as a chain transfer agent a thiol having the formula HS-Y(Z).sub.x wherein Y is a hydrocarbyl radical having 2-5 carbons and a valence of x+1; Z is selected from the group consisting of --OH, --CO.sub.2 H and --CO.sub.2 R wherein R is an alkyl radical of 1-3 carbon atoms; x is an integer of 1 or 2 and wherein the total number of carbon atoms per molecule of the thiol is 2-7.

Abstract: A soft-rubbing shaped adhesive is based on an adhesive forming polymer solution gelled with a soap-forming gelling agent in the presence of a modifying additive comprising an aminocarboxylic acid or corresponding lactam, preferably an aminocarboxylic acid containing from 4 to 8 carbon atoms. Especially useful modifying additives include caprolactam, the sodium salt of aminocaproic acid, or a mixture thereof.

Abstract: This invention is a process for preparing a polymer polyol comprising the steps of(a) forming in a first step a dispersant by homopolymerizing a vinyl-terminated adduct, or copolymerizing said adduct with an ethylenically unsaturated monomer or mixture thereof which is not a vinyl-terminated adduct, in the presence of an active hydrogen-containing compound as a solvent under conditions such that the resulting dispersant is soluble in a base polyol, and has a Brookfield viscosity of less than about 25,000 centipoises as a 20-35 wt. -% solution in an active hydrogen-containing compound, and(b) polymerizing an ethylenically unsaturated monomer or mixture thereof in the presence of said dispersant and a base polyol under conditions such that the polymerized monomer forms a plurality and particles which are stabilized against agglomeration by the dispersant.

Abstract: Cross-linked dispersion copolymers are disclosed which are produced by the aqueous emulsion copolymerization of from 15% to 80% of vinyl acetate, and from 5% to 70% of polyethylenically unsaturated cross-linking agent, like hexane diol diacrylate, from 1% to 40% of other copolymerizable monoethylenically unsaturated monomer being desirably present, preferably from 5% to 25% of a reactive monomer which is desirably hydroxyl-functional. The dispersion copolymers are suspended in active organic solvents which extensively swell the copolymer particles. These suspensions are useful in thermosetting solution coating compositions where they provide improved thermal sag resistance.

Abstract: Water-in-oil emulsions of monomers which form water-soluble polymers are polymerized in the presence of a biphase initiator system containing both an oil-soluble initiator and a water-soluble initiator or activator or alternatively a water-soluble initiator and an oil-soluble activator which results in polymers having improved performance characteristics. In addition, the system permits the satisfactory polymerization of monomers which could not have been reproducibly polymerized.

Abstract: An improvement in acrylate polymer pressure sensitive adhesive compositions consists of using a reactive scavenging monomer to remove objectionable residual monomer by copolymerization to form a non-objectionable copolymer.

Abstract: The present invention relates to the art of veterinary science. The preparation for prevention and treatment of myiases of animals comprises the following components, percent by mass:an insecticide exhibiting a larvicidal effect: 1.4 to 2.3a 5-10% ethanolic solution of polyvinylbutyral and a resol-type phenolformaldehyde resin taken in a ratio of 1:10-45: 16 to 35.0a plastifying agent improving elasticity of the resulting polymeric film: 1.0 to 20.0an antibiotic: 0.1 to 0.7an organic solvent: the balance.

Abstract: An aqueous coating composition comprising (A) an aqueous medium, (B) at least one water soluble or dilutable resin which has a water tolerance of 4 or more and whose 1% by weight aqueous solution shows a surface tension of 51 dyne/cm or less, and (C) fine particles of resinous solution of water insoluble resin in a hydrophobic solvent, the particles being uniformly dispersed in the combination of said aqueous medium (A) and the water soluble or dilutable resin (B) and having a mean diameter of 1.mu. or less, which is characterized in that the absolute value of difference in solubility parameter (.vertline..DELTA.Sp.vertline.) between said resinous solution and said water soluble or dilutable resin is within a range of .vertline..DELTA.Sp.vertline.<2.The present coating composition is excellent in storage stability and application characteristics, resulting a coating with excellent gloss and surface smoothness.

Abstract: The invention provides an organic solvent free, phosphate free, lithographic desensitizing composition which comprises:(a) from about 0.1% to about 20.0% by weight of the composition of a copolymer of polymethyl vinyl ether and maleic acid having the formula ##STR1## which has a molecular weight in an amount of from about 20,000 to about 70,000; and(b) from about 0.1% to about 20.0% by weight of the composition of a desensitizing component comprising one or more hydroxy carboxylic acids or salts; and(c) sufficient water to formulate a desensitizing composition; and(d) sufficient base to adjust the pH of the composition into the range of from about 6.5 to about 7.5.

Abstract: There is disclosed a process for recovering olefin monomers, e.g., C.sub.3 -C.sub.10 alpha-olefins, from a vent gas of a vapor phase process for polymerizing olefins. The method comprises passing the vent gas, obtained by purging a resin produced in the polymerization process with an inert gas, such as nitrogen, into contact with an adsorbent to effect the adsorption of an olefin monomer. Subsequently, the adsorbed monomer is removed by contacting the adsorbent with a second monomer having lower molecular weight than the adsorbed monomer.

Abstract: There is disclosed a process and apparatus for forming hydrophilic polymeric solutions wherein a vessel is provided with a mixing assembly comprised of co-axially and vertically-disposed inner and outer cylindrically-shaped wall members mounted to a bottom wall member wherein the inner wall member defines a mixing chamber and is provided with orifices about a lower portion thereof to provide fluid communication to a solution chamber defined between the wall members and wherein an upper end portion of the outer wall member defines a weir to the vessel and wherein an agitator is positioned within the mixing chamber to admixed feed hydrophilic polymer and solvent in a vortex of polymeric solution contained in the mixing chamber and to cause the polymeric solution to overflow the weir into the vessel.

Abstract: A stick for the application of adhesive material to a substrate, comprising an adhesive dissolved or dispersed in a liquid medium containing an alkali metal or ammonium salt of an aliphatic carboxylic acid having from 8 to 36 carbon atoms, characterized in that the adhesive comprises a mixture of (i) an aqueous dispersion of an optionally carboxylated (C.sub.4 to C.sub.10)-alkyl ester of acrylic acid and (ii) an aqueous dispersion of polyethylene.The stick enables articles to be removably bonded to substrates without leaving a film of adhesive on the substrate after removal.

Abstract: An epoxy resin encapsulating composition for semiconductor packages consisting essentially of an epoxy resin adduct of epichlorohydrin and an aromatic hydroxyl-containing compound, and an inorganic ion-exchange solid material admixed with the epoxy resin adduct. The ion-exchange solid material is selected to have the capability of exchanging its mobile anions with the undesired chlorine ions which occur inherently in the package made from the encapsulating composition and are very likely to corrode the metallic conductor on the semiconductor to be encapsulated. The ion-exchange solid material is characterized to include antimony and bismuth as basic materials forming an ion-exchange network which carries the mobile anions to be substituted with the chlorine ions. This ion-exchange material also is found to be also effective for trapping undesired alkali metal ions, for example, Na.sup.

Abstract: Process for preparing copolymers from esters of an unsaturated carboxylic acid with at least one other unsaturated monomer, characterized in that the following components are copolymerized in radical substance polymerization:(A) 5 to 60 parts by weight of at least one diester of an .alpha.,.beta.-olefinically unsaturated dicarboxylic acid having 1 to 8 carbon atoms in the ester group,(B) 10 to 70 parts by weight of at least one vinyl aromatic hydrocarbon having one vinyl group,(C) 0 to 30 parts by weight of at least one glycidyl ester of an aliphatic saturated monocarboxylic acid branched in the .alpha.-position,(D) 0 to 50 parts by weight of at least one ester, amide and/or anhydride of an .alpha.,.beta.-olefinically unsaturated mono- and/or dicarboxylic acid,(E) 0 to 40 parts by weight of at least one .alpha.,.beta.

Abstract: The use of acyl phosphanoxides of the formula I ##STR1## in which each R, independently of the others, can denote linear or branched C.sub.1 -C.sub.12 -alkyl, cycloalkyl or optionally mono- or poly-C.sub.1 -C.sub.12 -alkyl-substituted, alkoxy-substituted or halo-substituted aryl or phenyl,for improvement of the mechanical properties in ABS moulding materials.

Abstract: The invention relates to a two-stage method for concentrating solutions of polyphenylene ethers (5-15 wt. %) in organic solvents, wherein the first stage is operated with recycle and the second stage is operated in a single pass with no recycle side streams, to produce an accurately adjusted final concentration of between 50 and 60 wt. %.

Abstract: The invention provides non-gelled polymers containing integral isocyanato groups, which can be formulated into coating compositions. The polymers are derived preferably from polymerizable, ethylenically unsaturated blocked mono-isocyanato group-containing monomer, hydroxyl group-containing monomer and an amino group-containing monomer and/or carboxyl group-containing monomer. The coating compositions, particularly the electrodepositable compositions of this invention, possess excellent properties of wet appearance, substrate adhesion, hardness, chemical resistance and glossy appearance.