Reduction of permeation through a polymer

Details Reduction of permeation through a polymer Reduction of permeation through a polymer

2007-11-20

2007-11-20

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C264S176100, C264S219000, C525S185000, C525S539000, C528S480000

Reexamination Certificate

active

10894753

ABSTRACT:
A method for reducing the permeation rate of a permeable species through a polymeric material includes identifying a solubility-increasing species in the polymeric material having a reversible affinity for the permeable species, and removing or altering at least a portion of the solubility-increasing species in the polymeric material. In one application, the permeable species is water, and the solubility-increasing species is hygroscopic. A example of a polymeric material is an elastomeric polymer. The solubility-increasing species may be removed in part from an existing piece of the polymeric material by leaching it out. The polymeric material may instead be manufactured with a reduced content of the solubility-increasing species.

REFERENCES:
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ASTM Standard E96-00, Standard Test Methods for Water Vapor Transmission of Materials, pp. 1-8, 2000.

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