Abstract: A process for producing vinyl polymers involving polymerization of vinyl monomers in the presence of polyarylenealkylenes of the formula: ##STR1## WHEREIN Ar.sub.1 and Ar.sub.2 are ##STR2## m + n + 2 to 30, k = 1 or 2, at k = 1 Ar.sub.1 and Ar.sub.2 are also ##STR3## where X is H, a C.sub.1 -C.sub.4 alkyl, or in the presence of hydroperoxides of said polyarylenealkylenes; said polyarylenealkylenes or hydroperoxides thereof are used in an amount ranging from 0.01 to 15% by weight of the starting vinyl monomers. The process of the present invention makes it possible to obtain vinyl polymers featuring an enhanced heat-resistance and, in some cases, improved mechanical and electrical properties.

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: Ethylene is polymerized alone, or with other comonomers, under high pressure with oxygen and two or more organic initiators in a tubular reactor for the purposes of increasing the conversion of monomer to polymer and to produce polymer which has a low hexane extractables content, and which has, in the form of film, improved optical properties.

Abstract: Novel copolymers of the endo and exo cyclic adducts of maleic anhydride and cyclic conjugated dienes such as cyclopentadiene. The copolymers are prepared by heating either of the cyclic adducts in the presence of a free radical precursor, such as a peroxygen compound, at a temperature at which endo-exo isomerization of the adduct occurs.

Abstract: Organic nitrones are stabilizers for anaerobically-setting adhesive compositions wherein the principal adhesive component is a (meth) acrylic acid ester and the catalyst is an organic peroxide. The nitrone improves the storage-stability of the adhesives in contact with air.

Abstract: Ethylenically unsaturated material susceptible to free-radical polymerization, e.g., vinyl chloride monomer, is polymerized, e.g., in an aqueous medium, with an initiator system comprising, in combination, alkaline reagent, e.g., sodium bicarbonate, organic acid anhydride, e.g., isobutyric anhydride, peroxygen compound selected from organic peroxy acid (peracid), e.g., peracetic acid, and hydrogen peroxide, and alkyl pyrocarbonate, e.g., diethyl pyrocarbonate. The initiator system is added to the polymerization medium in amounts sufficient to polymerize the ethylenically unsaturated material.

Abstract: Organic sulfonic acid hydrazides are accelerators for aerostable anaerobically-setting adhesive compositions. They can be used with stabilizers. Preferred hydrazides of this group are the aryl sulfonic acid hydrazides, for example benzene sulfonic acid hydrazide. These provide rapid setting time with good ultimate strength, and have little adverse effect on the storage stability of the compounds when access of air is permitted.

Abstract: Ethylenically unsaturated material susceptible to free radical polymerization, e.g., vinyl chloride monomer, is polymerized, e.g., in an aqueous medium, with an initiator system comprising, in combination, dialkyl pyrocarbonate, hydrogen peroxide, and alkaline reagent, e.g., sodium bicarbonate. The initiator system is added to the polymerization medium in amounts sufficient to polymerize the ethylenically unsaturated material.

Abstract: An improved process for the suspension polymerization of vinyl chloride homopolymers is accomplished by the addition of small amount of chain extending agent to the polymerization formula allowing the polymerization to be run at a higher temperature thus making better use of the reactor's heat removal capability. More efficient use of initiator is also accomplished while producing polyvinyl chloride having the desired molecular weight dependent physical properties. The process also allows a faster rate of polymerization.

Abstract: Polymers are prepared by reacting a particular class of monomer with a curing agent selected from the group consisting of hydrogen peroxide, organic peroxides, and organic hydroperoxides. The monomers are characterized by the general formula: ##EQU1## wherein x is an integer from 0 to 3; y is an integer from O to x; and R.sub.1 and R.sub.2 are selected from the group consisting of acryloyloxy and lower alkyl acryloyloxy; R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are selected from the group consisting of hydrogen and lower alkyl; R.sub.9 and R.sub.10 are selected from the group consisting of hydrogen, lower alkyl, lower hydroxyalkyl, lower hydroxyalkyl acryloyloxy, and lower hydroxyalkyl methacryloyloxy; and R.sub.11 is a lower alkylene group linking two nitrogen atoms.The invention also provides a two-component sealant system which includes a second component comprising a curing agent dissolved in a volatile solvent.

Abstract: Disclosed is a method for crosslinking elastomers containing randomly distributed sites of conjugated olefinic unsaturation of which the crosslinks are comprised of chains of free radical polymerizable monomers.

Abstract: Hydrophilic, water insoluble, organic solvent soluble polymers of hydroxyalkyl methacrylate or acrylate of high purity are prepared in water using hydroxyalkyl methacrylate or acrylate monomer having not over 0.035 weight percent of alkylene glycol dimethacrylate or diacrylate. The polymers have high molecular weight and narrow molecular weight distribution and are useful for medical applications, e.g., as a burn dressing.

Abstract: A new class of compounds: R-W-R' where R and R' are identical oxy radicals containing peroxide functions such as dialkyl or diaralkyl peroxide, proxyketal, peroxyester, or monoperoxycarbonate, and W is a carbonyl group, or carbonyl containing group, or an alkylidene or aralkylidene group, or a phosphorous containing group.Examples:Di[1,3-dimethyl-3-(t-butylperoxy)butyl]carbonate;Di[1,3-dimethyl-3-(n-butoxycarbonylperoxy)butyl]carbonate;2,2-Bis[3,3-di(t-butylperoxy)butyoxy]propane;Di[1,3-dimethyl3-(t-butylperoxy)butyl]ethyl phosphate.They are free radical affording compounds useful in crosslinking of polyolefins and unsaturated polymers, and for the polymerization of vinyl monomers and diolefinic monomers.

Abstract: A method of polymerizing imide type norbornene derivatives which comprises the ring-opening polymerization of imide type norbornene derivatives containing at least one N-substituted cyclic imide group or a mixture consisting of said norbornene derivatives as the main component and cycloolefins in the presence of a catalytic system comprising organic aluminum compounds and tungsten and/or molybdenum compounds.

Abstract: This invention relates to copolymers and hydrogels formed by copolymerization of a hydrophilic monomer from the group of dihydroxyalkyl acrylates and methacrylates and a substantially water insoluble monomer from the group of alkyl acrylates and methacrylates. The preferred copolymer of the invention is formed from methyl methacrylate and glyceryl methacrylate (2,3-dihydroxypropyl methacrylate). The hydrogels of the invention have unique physical and physiological properties which are particularly useful for the formation of contact lenses, particularly contact lenses having a relatively thin cross-section, though they may also be used for other purposes such as drug and pesticides delivery devices, dialysis, ultrafiltratiaon and reverse osmosis membranes, implants in surgery and dentistry and the like.

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.