Modified polymers having controlled transmission rates

  • US 6,124,006 A
  • Filed: 05/29/1998
  • Issued: 09/26/2000
  • Est. Priority Date: 04/19/1995
  • Status: Expired due to Term
First Claim
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1. An article of manufacture comprising a shaped article formed by:

  • (a) mixing at least about 20% by weight of a polymer, between about 10% to about 70% by weight of an absorption additive and at least about 5% by weight of a channeling agent, wherein the percent by weight of each component is based on the total weight of the three components;

    (b) heating the mixture at a temperature at least above the melt point of the channeling agent so that the absorption additive and channeling agent are distributed within the polymer;

    (c) cooling the mixture to form a shaped article having a channel morphology in the polymer wherein the channels are composed of the channeling agent and wherein the absorption additive is primarily concentrated within the channeling agent.

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