Process for molding a highly-refractive plastic lens

Details Process for molding a highly-refractive plastic lens Process for molding a highly-refractive plastic lens

1989-02-15

1991-05-07

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Changing mold size or shape during molding or with shrinkage...

264 11, 523106, B29D 1100

Patent

active

050134965

ABSTRACT:
A process for producing a plastic lens having a high refractive index and profile regularity which includes forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the group consisting of polyol compounds and polythiol compounds, and at least one internal mold releasing agent. Then subjecting the resulting mixture to casting polymerization, to form the plastic lens.

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patent: 4534916 (1985-08-01), Wichterle
patent: 4689387 (1987-08-01), Kajimoto et al.
patent: 4775733 (1988-10-01), Kanemura et al.
patent: 4791185 (1988-12-01), Kanemura et al.

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