Elastomeric sponge
AssigneeE. I. Du Pont de Nemours and Company
InventorAntonio Vidal
Life of this patent
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Abstract
An expandable composition of a solid synthetic vulcanizable elastomer of ethylene/higher alpha-olefin/nonconjugated diene copolymer or polychloroprene, a blowing agent, and a curing agent for the elastomer, said composition containing from about 5-25% based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mole percent ethylene and bearing from about 0.2-25 mole percent acid functional groups that are at least about 50% neutralized by metal ions.
Claims18
An expandable composition comprising a solid synthetic vulcanizable elastomer selected from the group consisting of ethylene/higher .alpha.-olefin/nonconjugated diene copolymer or polychloroprene, 1-15 parts per 100 parts total polymer of a solid blowing agent, a curing agent for the elastomer, and from about 5-25 percent based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mol percent ethylene and bearing from about 0.2-25 mol percent acid functional groups that are at least about 50% neutralized by metal ions, said composition when heated to activate the blowing agent and the curing agent undergoing simultaneous curing and expansion to form a closed cell sponge of substantially uniform cell size.
Dependencies are inferred from the claim text.