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US 4,378,278 AGranted
Polymer foams produced by electron beam radiation
AssigneeS. C. Johnson & Son, Inc.
InventorsJames R. Allaway, Daniel R. Bloch, Michael P. Fischer
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Abstract
A process for forming a polymeric foam comprising mixing a liquid multi-functional acrylate monomer and a liquid nonionic fluoronated alkyl-ester surfactant, foaming the surfactant monomer mixture and passing the foamed surfactant monomer mixture under a source of electron beam radiation to polymerize the monomer into a polymeric foam structure.
Claims2
A process for forming polymeric foams which comprises:
- (a) Mixing at least one liquid, multi-functional acrylate monomer and from 0.05 to 5% by weight of a liquid nonionic fluoronated alkyl-ester surfactant having the formula ##STR2## wherein R.sub.f is a fluoro alkyl group having from 3 to 12 carbon atoms, m is an integer from 2 to 12 and R is a low molecular weight polyoxyethylene, polyoxypropylene or polyoxyethylene polyoxypropylene copolymer group;
- (b) foaming the monomer surfactant mixture, and
- (c) irradiating the foamed monomer surfactant mixture with high energy ionizing radiation having an energy of at least about 150,000 electron volts at a dose rate no greater than 100 megarads per second to provide a dosage of from 0.75 to 15 megarads to form a polymeric foam material.
Dependencies are inferred from the claim text.