Compositions of nitrile rubber and cellulose ester
AssigneeMonsanto Company
InventorsAubert Y. Coran, Raman Patel
Life of this patent
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Abstract
Compositions are described comprising blends of nitrile rubber and cellulose ester.
Claims15
A composition comprising a blend of about 5-65 parts by weight of cellulose ester selected from the group consisting of cellulose propionate, cellulose butyrate, cellulose acetate propionate and cellulose acetate butyrate, and correspondingly, about 95-35 parts by weight of cured nitrile rubber in which the rubber is cured to the extent that no more than 25 weight percent of the rubber is extractable in a solvent in which uncured nitrile rubber is essentially completely soluble.
An elastoplastic composition comprising a blend of cellulose ester selected from the group consisting of cellulose propionate, cellulose butyrate, cellulose acetate propionate, and cellulose acetate butyrate, in an amount sufficient to impart thermoplasticity to the composition, and cured nitrile rubber in the form of dispersed particles of a size small enough to maintain thermoplasticity of the composition and which rubber is present in an amount sufficient to impart rubberlike elasticity to the composition in which the rubber is cured to the extent that no more than 25 weight percent of the rubber is extractable in a solvent in which uncured nitrile rubber is essentially completely soluble.
Dependencies are inferred from the claim text.