Abstract: Aziridine compounds having the following structural formula: ##STR1## wherein R.sub.1 represents an alkylidene group;R.sub.2 represents hydrogen or an alkyl radical;R.sub.3 represents an aromatic hydrocarbon moiety;R.sub.4 represents an alkyl radical;R.sub.5 represents an alkylene radical;R.sub.6 represents hydrogen, an alkyl radical, phenyl or combinations thereof; andX represents oxygen, --S--, NH--, or NR--, wherein R represents an alkyl or phenyl are disclosed. Acrylic polymers containing moieties of at least two such aziridine compounds depending therefrom are also disclosed. The acrylic polymers are relatively non-toxic and have negligible inhalation irritation and are useful in the formulation of coating compositions which harden or cure at low temperatures.

Abstract: A transparent resin material consisting of a hydrogenation product of a (co)polymer obtained by subjecting at least one compound represented by general formula (I) or a combination of at least 5% by weight of said compound and 95% by weight or less of other copolymerizable cyclic olefin monomer to metathesis polymerization: ##STR1## wherein A and B are independently hydrogen atoms or C.sub.1-10 hydrocarbon groups; and X and Y are independently hydrogen atoms, C.sub.1-10 hydrocarbon groups, --C(CH.sub.2).sub.n COOR.sup.1 groups or --(CH.sub.2).sub.n OCOR.sup.1 groups [R.sup.1 is a C.sub.1-20 hydrocarbon group and n is 0 or an integer of 1-10] with the proviso that at least one of X and Y is selected from the above --(CH.sub.2).sub.n COOR.sup.1 and --(CH.sub.2).sub.n OCOR.sup.1 groups. Said transparent resin material is moldable and has sufficient optical properties, low hygroscopicity, good heat resistance and excellent adhesion to recording layer.

Abstract: A styrene-based copolymer comprising 74.3 to 98.7 mol % of the structural unit (I) represented by the general formula: ##STR1## 1.3 to 25.4 mol % of the structural unit (II) represented by the formula: ##STR2## and 10 to 7000 mol ppm of the structural unit (III) represented by the general formula: ##STR3## (wherein R.sup.1 to R.sup.3 are as defined in the appended claims), characterized by having toluene-insoluble content of not more than 0.5% by weight, is disclosed.Efficient processes for producing the above styrene-based copolymer are also disclosed.

Abstract: A process is described for carrying out aqueous and non-aqueous polymerization of polymerizable monomers, particularly vinyl monomers, and, preferably, vinylpyrrolidone, in the presence of a mixture of a stable, high purity, free-flowing, fine white powder of a substantially anhydrous 1:1 molar ratio complex of polyvinylpyrrolidone-hydrogen peroxide (PVP--H.sub.2 O.sub.2), respectively, and a transition metallic ion, as a free radical initiator, is described herein. Preferred polymerizations are the homopolymerization of vinylpyrrolidone and the copolymerization of maleic anhydride and a C.sub.1 -C.sub.5 alkyl vinyl ether.

Abstract: Ethylenically unsaturated cyclic ortho esters are prepared by the reaction of a hydroxy-substituted cyclic ortho ester such as 4-hydroxymethyl-2-methoxy-2-methyl-1,3-dioxolane with acryloyl chloride, methacryolyl chloride, vinylbenzyl chloride or the like. They form polymers, especially random copolymers with styrene and EPDM graft copolymers; the latter are useful in the formation of copolymer-containing compositions with polyesters, polyamides and the like. The copolymer-containing compositions have excellent physical properties and may be employed to compatibilize blends of the same polymers.

Abstract: Copolymers ofa) phosphonic acid derivatives corresponding to formula (I) ##STR1## wherein Y represents H or CH.sub.3,X represents a single bond or --CH.sub.2 --,R represents an aryl or alkyl,b) maleic anhydride andc) a polymerizable compound containing two or more allyl or methally groups in the molecule.

Abstract: A cross-linked polymer-supported 4-(N-benzyl-N-methylamino) pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterized by the suspension copolymerization of an organic phase containing the corresponding vinyl-substituted pyridine monomer, a styrene monomer, and a suitable cross-linking agent and free radical-generating catalyst in the presence of an aqueous phase containing a cellulose ether derivative as the stabilizing agent. A purified acid salt of the vinyl-substituted pyridine monomer useful in polymerizations and stable for storage as either a solid or an aqueous solution.

Abstract: According to this invention, there is provided a denture adhesive which is a mixed partial salt of a copolymer of maleic anhydride and acrylic acid (or methacrylic acid), optionally including a C.sub.1 -C.sub.4 alkyl vinyl ether, having a weight average molecular weight of about 30,000 to 400,000, preferably about 50,000 to 350,000. The copolymer comprises about 10 to 70 mole percent, preferably 20 to 60 mole percent, of maleic anhydride, about 30 to 90 mole percent, preferably 40 to 80 percent, of acrylic acid (or methacrylic acid), and 0 to 25 mole percent of a C.sub.1 -C.sub.4 alkyl vinyl ether.

Abstract: Heat-curable bismaleimide resins contain a bismaleimide, an aromatic dialkenyl compound as comonomer and also from 1 to 40% by weight of a monoalkenyl compound, preferably 2-hydroxy-3-allylbiphenyl, as reactive diluent.

Abstract: Compounds which contain peroxide linkages as well as a hindered amine light stabilizer moiety of low basicity function as free radical polymerization initiators and provide a polymer containing a hindered amine stabilizer chemically bonded to said polymer. The low basicity of the instant compounds prevents interaction with acid catalysts used in some polymerization systems.

Abstract: Temporary wet strength resins, and paper products containing same, having a molecular weight of from about 20,000 to about 200,000, most preferably from about 30,000 to about 95,000, having the formula: ##STR1## wherein: A is ##STR2## and X is --O--, --NH--, or --NCH.sub.3 --, and R is a substituted or unsubstituted aliphatic group; Y.sub.1 and Y.sub.2 are independently --H, --CH.sub.3, or a halogen; W is a nonnucleophilic, water-soluble nitrogen heterocyclic moiety; and Q is a cationic monomeric unit. The mole percent of "a" ranges from about 30% to about 70%, preferably from about 45% to about 55%; the mole percent of "b" ranges from about 30% to about 70%, preferably from about 45% to about 55%; and the mole percent of "c" ranges from about 1% to about 40%, most perferably from about 2% to about 8%.

Abstract: Curable compositions comprising(a) an aromatic bismaleimide of formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and each is C.sub.1 -C.sub.4 alkyl, and R.sub.3 and R.sub.4 are each independently of the other a hydrogen or halogen atom, or a mixture of an aromatic bismaleimide of formula I and N,N'-4,4'-methylenebis(phenylmaleimide),(b) an alkenyl phenol, an alkenyl phenol ether or a mixture thereof, with the proviso that the alkenyl moiety contains at least 3 carbon atoms,are readily processable, well suited for the fabrication or prepregs or fibre-reinforced composites, and give mouldings having excellent ultimate strength.

Abstract: Copolymers comprising, in polymerized form, a 1,1-substituted arylethylene comonomer and at least one polymaleimide comonomer, are prepared using a system that provides a reduced onset of polymerization temperature thereby allowing removal of the copolymer from the mold after a preliminary curing period followed by transfer to an oven, a less expensive piece of equipment, for additional curing; thus making the mold, a more expensive piece of equipment, available for the next polymerization run.

Abstract: Copolymers based on tert-butyl acrylate and/or tert-butyl methacrylate, having a K value of from 10 to 50 and obtainable by free radical polymerization ofA) from 20 to 90% by weight of tert-butyl acrylate and/or tert-butyl methacrylate,B) from 10 to 60% by weight of N-vinylpyrrolidone andC) from 0 to 30% by weight of a C.sub.1 -C.sub.20 -alkyl acrylate, a C.sub.1 -C.sub.20 -alkyl methacrylate, a C.sub.2 -C.sub.4 -hydroxyalkyl acrylate, a C.sub.2 -C.sub.4 -hydroxyalkyl methacrylate or vinyl acetate or a mixture thereof,are used as film formers in hair setting compositions and compositions for the surface protection of two- or three-dimensional structures.

Abstract: The present invention provides a copolymer comprising the polymerization product of two or more vinyl monomers wherein one of the monomers is a mixture of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium halide and 2-methacryloyloxy-3-hydroxypropyltrimethylammonium halide salt. The copolymer has an intrinsic viscosity greater than about 5 dl/g. The preferred copolymer comprises the polymerization product of acrylamide and a mixture of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride and 2-methacryloyloxy-3-hydroxypropyltrimethylammonium chloride. The copolymers of the present invention are particularly useful as flocculants.

Abstract: This invention relates to the polymerization of a monomer capable of forming a precipitate of polymerized particles which comprises reacting in the liquid phase said monomer in the presence of a high temperature, free radical initiator at a temperature within a critical range of between about 110.degree. and 150.degree. C. to produce a particulate polymeric product having a glass transition temperature. (Tg) in excess of the temperature at which polymerization is effected and having a residual monomer content less than 1,000 ppm.

Abstract: Curable resin composition comprising a compound (A) having one or more maleimide groups within the molecule thereof, and vinlbenzyl compound (B) obtained by reacting amines with halomethylstyrene in the presence of alkali.The composition exhibits excellent low-temperature curability, heat resistance and mechanical strength.

Abstract: Electrically conductive polypyrrole and its derivatives are prepared by polymerizing compounds of the formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen, halogen, R.sup.4, --OR.sup.4 or --SR.sup.4 ; and R.sup.4 is aryl of 4 to 12 carbons or aliphatic of 1 to 20 carbons; comprising reacting the compound of formula I in the presence of an initiator, the initiator comprising a 2-substituted pyrrole nucleus which has a lower oxidation potential than the compound of formula I and which is capable of being incorporated into the polymer resulting from the polymerization reaction; a chemical oxidant or an applied electrochemical potential; and a solvent.

Abstract: Bisimides of the formula I ##STR1## in which, for example, R.sup.1 is hydrogen, x is 1, y is zero and R is bis-(1,4-phenylene)-methane are intermediates for the preparation of polymers having excellent physical properties, and are suitable for the production of mouldings, coatings and adhesive joints and, in particular, for the production of prepregs and heat-resistant composite materials.

Abstract: A hydrophilic contact lens is disclosed incorporating melanin that protects the eye from harmful radiation and superoxide.