Three-dimensional articles of lyotropic polymers and methods for

Details Three-dimensional articles of lyotropic polymers and methods for Three-dimensional articles of lyotropic polymers and methods for

1994-10-28

1998-08-04

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

204 291, 204233, 204257, 20433112, 20433119, 204344, B29C 5512

Patent

active

057888884

ABSTRACT:
Described is a process for preparing a three-dimensional article of a lyotropic polymer comprising the steps of (a) forming a shaped article of a liquid crystalline solution of a lyotropic polymer; (b) washing the shaped article with a washing fluid under conditions sufficient to reduce the solvent content of the article to less than about 2,000 parts per million, wherein the dimensions of the washed article are no less than 0.05 inches by 0.05 inches by 0.05 inches. Such articles are useful for many applications, particularly those requiring fire- and/or heat-resistance.

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