Abstract: Interpolymers from monomers containing optical brightening moieties and solubilizing groups are useful in optical brightening compositions. Photographic elements containing these optical brightening compositions have excellent light stability.

Abstract: Copolymers are prepared from .omega.-bromoalkyl esters of acyclic unsaturated dicarboxylic acids and compounds copolymerizable therewith. The copolymers are useful as flame retardant plasticizers for polymers.

Abstract: Crosslinked polyacrylamides containing silyl groups are disclosed which are prepared in a simple and economical manner by polymerizing silylated acrylic acid amides in the presence of a crosslinking agent such as 1,4-butanediol-diacrylate. The resultant crosslinked silylated polyacrylamides are insoluble in customary solvents and are useful for the transfer of silyl groups to compounds which contain at least one mobile hydrogen atom. They may be employed, e.g., in gas chromatography, mass spectroscopy and chemical syntheses (for instance for the introduction of protective silyl groups).

Abstract: Ethylenically unsaturated blocked aromatic diisocyanates are prepared which readily polymerize to form homopolymers and interpolymers with copolymerizable vinylidene monomers. Polymers can be prepared via emulsion polymerization, and exhibit excellent stability to hydrolysis when stored in latex form. The polymers cure at temperatures as low as 80.degree. C., and under acidic, neutral, or basic pH conditions. Homopolymers and interpolymers of the defined diisocyanates are useful as adhesives, and interpolymers of the ethylenically unsaturated blocked aromatic diisocyanates with acrylate monomers are particularly useful as binders for nonwoven fibers.

Abstract: Ester copolymers cross-linkable under acid, alkaline and heated conditions consisting essentially of a copolymerizate with from 75% to 99% by weight of vinyl and/or acrylic ester monomer units, from 0.2% to 15% by weight of olefinically-unsaturated halotriazine monomer units, from 0.2% to 10% by weight of mono-olefinically unsaturated monomer units containing free or protected N-methylol groups and, optionally, up to 10% by weight of other monomer units copolymerizable with ester monomer units.

Abstract: Homopolymers, copolymers and terpolymers of a styrene based monomer are prepared by:(1) polymerizing at least one oxidized styrylphosphine monomer selected from the group of:(C.sub.6 H.sub.5).sub.2 P(O)N.dbd.P(C.sub.6 H.sub.5).sub.2 C.sub.6 H.sub.4 CH.dbd.CH.sub.2,(c.sub.6 h.sub.5 o).sub.2 p(o)n.dbd.p(c.sub.6 h.sub.5).sub.2 c.sub.6 h.sub.4 ch.dbd.ch.sub.2,(c.sub.6 h.sub.5).sub.2 c.sub.3 n.sub.3 n.dbd.p(c.sub.6 h.sub.5).sub.2 c.sub.6 h.sub.4 ch.dbd.ch.sub.2 and(C.sub.6 H.sub.5) C.sub.3 N.sub.3 [N.dbd.P(C.sub.6 H.sub.5).sub.2 C.sub.6 H.sub.4 CH.dbd.CH.sub.2 ].sub.2 ; or(2) polymerizing p-diphenylphosphinestyrene and then oxidizing said polymerized p-diphenylphosphinestyrene monomer with an organoazide selected from the group of (C.sub.6 H.sub.5).sub.2 P(O)N.sub.3,(C.sub.6 H.sub.5 O).sub.2 P(O)N.sub.3,(C.sub.6 H.sub.5).sub.2 C.sub.3 N.sub.3 (N.sub.3) and C.sub.6 H.sub.5 C.sub.3 N.sub.3 (N.sub.3).sub.2.

Abstract: The novel polymers are prepared from a charge containing the following ingredients:(a) vinyl chloride;(b) from 50 ppm to 1% by weight of the total charge of at least one branching agent selected from the group of vinylic and allylic esters and amides and having at least two polymerizable double bonds in the molecule, in which branching agent the vinylic and allylic groups are linked directly the ester oxygen or amide atom, nitrogen respectively, as the case may be;(c) from 500 ppm to 5% by weight of the total charge of at least one chain transfer agent selected from the group consisting of unsubstituted and substituted aliphatic aldehydes, C.sub.1 and C.sub.2 halogenated hydrocarbons containing 3 or 4 atoms of chlorine or bromine in the molecule, sulfides and mercaptans;(d) at least one radical producing initiator.This charge is subjected to polymerization and the resultant vinyl chloride polymer is recovered from the reaction.

Abstract: Water-swellable, cross-linked, bead copolymers of (A) an ethylenically unsaturated monomer having a carboxylic acid anhydride, glycidyl or succinimide group, (B) a comonomer having at least two radical-polymerizable carbon double bonds, and (C) a radical-polymerizable water-soluble comonomer are disclosed to be excellent carriers capable of bonding with biologically active substances such as enzymes, enzyme substrates, inhibitors, hormones, antibiotics, antigens, and peptides.

Abstract: Copolymers are prepared from .omega.-bromoalkyl ester of acyclic unsaturated dicarboxylic acids and compounds copolymerizable therewith. The copolymers are useful as flame retardant plasticizers for polymers.

Abstract: A method is provided for the production of homogeneous copolymers from monomers having differing reaction rates; in particular copolymers of acrylonitrile or of vinylidene chloride are disclosed. The monomers are fed to the reaction mixture at a rate sufficient to maintain a constant monomer ratio in the reaction mixture throughout the course of the reaction, the rate of addition being determined by the rate of evolution of heat as measured by the rate that a cooling system removes heat evolved by the reaction. An injection-mouldable copolymer consisting essentially of acrylonitrile units and uniformly distributed units of styrene or .alpha.-methyl styrene may be produced in this way. Films of the copolymer can be oriented by stretching at 90.degree.-140.degree. C. Its softening point may be increased by copolymerizing a minor amount of N-aryl maleimide.

Abstract: A polyvinyl chloride extender resin having an average particle size of between about 5 microns and about 50 microns can be formed by using conventional suspension polymerization procedures if a prehomogenized solution comprising an effective amount of polyallyl compound and a low molecular weight propylene polymer are incorporated in the suspension polymerization medium to control the rheological properties of the resin.

Abstract: This invention deals with new unsaturated esteramides of .alpha.,.beta. -unsaturated polycarboxylic acids derived from halogenated alcohols of the formula ##STR1## wherein R is a divalent hydrocarbon moiety having at least one and no more than 10 carbon atoms, X is a member selected from the class of bromine and chlorine, and R' is a member selected from the class of hydrogen, X and a monovalent hydrocarbon containing at least one and no more than 20 carbon atoms. Typical esteramides are the maleates, fumarates, itaconates and citraconates. These monomers possess fire-retardant properties and are useful for the synthesis of polymers and copolymers.

Abstract: Certain elastomers may be adhered to a large number of solid surfaces by incorporating into such elastomers hexahydro-s-triazines having the formula: ##EQU1## R is either the radical CH.sub.2 =CH-- or CH.sub.2 =C(CH.sub.3).

Abstract: A method of polymerising a composition comprising an allyl amine salt of a strong acid said allyl amine containing two or more allyl groups which method comprises reacting said composition in the presence of a free radical initiator which yields only uncharged fragments and at a temperature between -20 and 80.degree.C and at a pH between 0 and 5 in the absence of oxygen.

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.