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Method of producing porous plastic materials

  • US 4,076,656 A
  • Filed: 07/20/1973
  • Issued: 02/28/1978
  • Est. Priority Date: 11/30/1971
  • Status: Expired due to Term
First Claim
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1. Method of making porous plastic bodies comprising the steps of dispersing in a fluxable polymer, substantially unplasticized, at least about 45 volume percent of a water-soluble material in particle form and blending therewith a channel-forming water-soluble liquid of less than 10,000 poise at the processing temperature of the polymer, the amount of said liquid being from 0.1 to 15 volume percent to form a network of channels interconnecting the dispersed particles, fluxing and solidifying the polymer blend containing said particles and liquid into a polymer body, and thereafter extracting with water said solid and liquid materials to form a porous plastic body.

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