American Cyanamid Company

Rudolf Adolf Behrens

Eugene Y Chang

Donald R Maulding

Guido Mino

Polyacrylate-containing elastomers, having improved tensile strength and hardness upon vulcanization, comprise blends containing about 35 to 65 percent, by weight, of a sulfur-vulcanizable graft elastomer having a major proportion of ethyl acrylate and a minor proportion of an ethylenically unsaturated comonomer which contains a cure-site for sulfur vulcanization, grafted onto an ethylene-vinyl acetate copolymer, and about 65 to 35 percent, by weight, of a sulfur-vulcanizable polyacrylate elastomer.

Sulfur-vulcanizable blends of ethylene-vinyl acetate copolymer

The present invention relates in general to vulcanizable elastomers of thiodiethanol and, in particular, to the provision of a novel vulcanization system for vulcanizable elastomers of thiodiethanol, comprising sulfur and certain pyrazine compounds.

Vulcanization system for vulcanizable thiodiethanol elastomers

The present invention relates in general to sulfur-vulcanizable elastomers derived from thiodiethanol and, in particular to the provision of a novel vulcanization system therefor comprising sulfur and an aliphatic linear, branched chain of cyclic polyethyleneamine or a dissociable organic salt thereof.

Vulcanization system for thiodiethanol-based elastomers

A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils is provided which comprises one or more lower alkyl acrylic acid ester monomers polymerized with a comonomer containing either a halogen or an epoxy group, in the presence of from about 0.25 to 10 percent, by weight of total monomer, of a low molecular weight, unsaturated polymer of butadiene or isoprene or copolymers thereof with styrene or acrylonitrile. In addition, a process for preparing such elastomer compositions is also provided, together with the vulcanization of such elastomers and the resulting vulcanized polyacrylate.

Polyacrylate elastomer compositions

N,N'-[(thiocarbonyl)thio]dimorpholine is stabilized, as an acceleration for rubber, by incorporating therein various unsaturated amides or esters.

Stabilized accelerator composition for rubber

This invention relates to polyacrylate elastomers with improved elasticity, tear strength and abrasion resistance, having incorporated therewith certain unsaturated esters and amides of acrylic and methacrylic acid.

Polyacrylate elastomers with improved elasticity

The present invention relates to an improved vulcanization accelerator composition. More particularly, it relates to storage stable blends of accelerators, particularly benzothiazole sulfenamides and thiuram sulfides, and to a method for their preparation.

Stabilized accelerator compositions

The present invention is based on the discovery of an accelerator composition for the vulcanization of diene elastomers, comprising a benzothiazole sulfenamide, a thiuram sulfide and copper 2-mercaptobenzothiazole.

Rubber vulcanization accelerator composition

A process for the vulcanization of polyurethane elastomers is provided which comprises utilizing a vulcanization activator comprising a non-hygroscopic zinc halide composition.

Non-hydroscopic zinc halide compositions

Acrylate elastomer compositions having improved aging resistance due to addition of epoxy-containing compounds.

Acrylic elastomer compositions with improved aging properties

A vulcanization composition is provided which comprises a halogen- or epoxy-containing polyacrylate elastomer from about 0.05 to 2.5 parts of sulfur and from about 0.5 to 7 parts of either a sodium or potassium salt of 2-ethylhexanoic acid. In addition, an improved process for vulcanizing the elastomers is provided which comprises adding such sulfur and 2-ethylhexanoic acid salts to the polymer.

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Gladstone, NJ, United States of America

Rudolf Adolf Behrens