Method for producing transparent plastic article

Details Method for producing transparent plastic article Method for producing transparent plastic article

1988-12-29

1991-01-08

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 14, 264 22, B29C 3508, B29D 1100

Patent

active

049833359

ABSTRACT:
A transparent plastic article with less internal strain is produced by successively polymerizing a monomer part by part with forming a gel state part between the already polymerized part and the unpolymerized part, or by polymerizing a monomer by means of a mold which can follow cure shrinkage of the monomer in order to decrease cure shrinkage. The article produced is particularly suitable for optical applications such as an optical disc, a lens and a prism.

REFERENCES:
patent: 2687555 (1954-08-01), Anspon et al.
patent: 3699089 (1972-10-01), Wichterle
patent: 4113224 (1978-09-01), Clark et al.
patent: 4123407 (1978-10-01), Gordon
patent: 4497754 (1985-02-01), Padoan
patent: 4701288 (1987-10-01), Cook et al.
patent: 4702574 (1987-10-01), Bawa
patent: 4732715 (1988-03-01), Bawa et al.

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