Antistatic polyolefin composition
AssigneeSealed Air Corporation
InventorShau-Tarng Lee
Life of this patent
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Abstract
An expandable polyolefin composition is disclosed for forming antistatic foam products. The composition includes a polyolefin resin; a hydrocarbyl sulphonate; and an ester of a long-chain fatty acid and polyhydric alcohol. Each of the sulphonate and the ester are present in the composition in an amount sufficient to form a polyolefin product having desirable antistatic properties. A process for extrusion foaming of the composition, and thus formed foam products, are also disclosed.
Claims19
A process for producing a foam polyolefin product exhibiting desirable antistatic properties, comprising of the steps of:
- forming a polyolefin composition comprising a polyolefin resin;
- a hydrocarbyl sulphonate;
- and an ester of a long-chain fatty acid and polyhydric alcohol, said sulphonate and said ester each being present in said composition in an amount sufficient to form a polyolefin foam product having desirable antistatic properties;
- adding to said composition a blowing agent for expanding said composition;
- and
- extruding the mixture of said composition and said blowing agent under conditions so as to produce a foamed antistatic polyolefin product.
A process for producing a foam polyolefin product exhibiting desirable antistatic properties, comprising of the steps of:
- forming a polyolefin composition comprising a polyolefin resin;
- about 0.05 to about 1.5 percent by weight of said polyolefin of an hydrocarbyl sulphonate having the formula R--SO.sub.3 --X, wherein R is alkyl, aryl, or alkyl aryl, and X is an alkali or alkaline earth metal;
- and about 0.3 to about 3.0 percent by weight of said polyolefin of an ester of a long-chain fatty acid and polyhydric alcohol having the formula R--COOCH.sub.2 CHOHCH.sub.2 OH, wherein R is an alkyl having 4 to 23 carbon atoms;
- adding to said composition a hydrocarbon blowing agent for expanding said composition;
- and
- extruding the mixture of said composition and said blowing agent under conditions so as to produce a foamed antistatic polyolefin product.
Dependencies are inferred from the claim text.