Abstract: Polymer deposit or build-up on the interior surfaces of a polymerization vessel during polymerization of monoethylenically unsaturated monomers in aqueous dispersion may be inhibited by adding certain heterocyclic compounds to the dispersion prior to polymerization.

Abstract: A process for preparing a thermoplastic resin containing polar groups and unsaturated bonds which comprises reacting (A) five-membered cyclic compounds containing unsaturated conjugate double bonds, (B) unsaturated carboxylic acids or the anhydrides thereof and (C) monohydric saturated or unsaturated alcohols in a specified molar ratio.

Abstract: Novel alternating copolymers having functional groups are prepared by subjecting to alternating copolymerization at least one olefin, at least one acrylic ester and at least one .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative represented by the formula: ##EQU1## wherein Y and Z are independently --O--, --S--, or --NR.sup.3 --, and R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen or hydrocarbon groups having 1 to 20 carbon atoms. Said alternating copolymer consists essentially of a structure in which said olefin is bonded to only said acrylic ester or said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative, and said acrylic ester and said .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid or its derivative are bonded to only said olefin, and has a sufficiently high molecular weight.

Abstract: A process for the production of co- and multi-monomer random polymers involves the free-radical bulk polymerization of vinyl esters and styrene while controlling the rate of polymerization via the gradual addition of styrene to the polymerization medium during polymerization.

Abstract: Novel crosslinked heteropolymers of vinyl acetate and maleic anhydride are provided which are useful as aqueous thickeners for aqueous formulations such as cosmetics and latex paints. Ester and amide derivatives of the combined maleic anhydride portion of the heteropolymer are also provided. The process for preparing the crosslinked heteropolymers comprises adding a maleic anhydride monomer, and crosslinking agent monomer, and catalyst in controlled amounts to a monomer solution of vinyl acetate.

Abstract: This invention describes a process for the production of a single-component resin powder useful in electrostatic spray coating processes by the formation of partially esterified and alkoxylated copolymers obtained through the reaction of vinyl-aromatic hydrocarbons with alpha, beta-unsaturated dicarboxylic acid anhydrides which are subsequently half-esterified and thereafter the resultant carboxyl group of which is alkoxylated with C.sub.2 to C.sub.4 alkene oxides. Said copolymer is reacted with a monoblocked diisocyanate between 110.degree. and 130.degree.C in the melt form until said single-component resin powder is formed.

Abstract: Water-insoluble, water-swellable fibers adapted to bind aqueous fluids such as body exudates are prepared by spinning fibers from an organic solvent solution of a copolymer of maleic anhydride with suitable vinyl aromatic monomers. The copolymer solution also contains a small amount of a polyfunctional cross-linking agent such as an adduct of glycerine with ethylene oxide and propylene oxide which reacts to cross-link and plasticize the copolymer chains when the fibers are heated and dried. The cross-linked copolymer fibers are then rendered hydrophilic and water-swellable by reaction with ammonia.

Abstract: Ethylene-maleic anhydride interpolymers of improved hydrolytic and electrolytic stability are produced by cross-linking with about 0.35 to about 0.55 mol percent of triallyl isocyanurate based upon the maleic anhydride monomer.