Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ
Patent
1986-08-01
1988-10-04
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
264 53, 264129, 264236, 26433121, 264337, 264347, 264DIG13, 521 64, C08J 928, C08J 942, B29C 3504, B29C 3912
Patent
active
047755024
ABSTRACT:
A process for producing a microcellular cast resin product, by casting a water-in-oil emulsion of polymerizable components which will gel and partially polymerize by an exothermic reaction, and placing the partially polymerized casting in a fluid medium maintained at a temperature and pressure such that evaporation of water and monomers is inhibited but sufficient to promote complete polymerization while retaining dispersed water within a microcellular structure. The water content of the emulsion can range from about 1% to about 90% by weight, and the microcellular structure may be either the open cell or the closed cell type.
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