Plastic and nonmetallic article shaping or treating: processes – Treating shaped or solid article – Solvent polishing type
Patent
1981-05-29
1983-03-15
Derrington, James H.
Plastic and nonmetallic article shaping or treating: processes
Treating shaped or solid article
Solvent polishing type
428409, B29C 2500
Patent
active
043767516
ABSTRACT:
Super-smooth rounded or formed articles made of thermoplastic materials including various poly(methyl methacrylate) or acrylonitrile-butadiene-styrene copolymers are produced by immersing the articles into a bath, the composition of which is slowly changed with time. The starting composition of the bath is made up of at least one solvent for the polymer and a diluent made up of at least one nonsolvent for the polymer and optional materials which are soluble in the bath. The resulting extremely smooth articles are useful as mandrels for laser fusion and should be useful for a wide variety of other purposes, for example lenses.
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Daniels et al. Physical Chemistry, 2nd Edition, Wiley and Sons, New York, 63, p. 354.
Modern Plastics Encyclopedia, pp. 533-536, Gross Editor--in--Chief (McGraw--Hill, NY 1974-1975).
Besha Richard G.
Derrington James H.
Gaetjens Paul D.
Slade Elizabeth O.
The United States of America as represented by the Department of
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