Process for manufacturing photochromic articles

Details Process for manufacturing photochromic articles Process for manufacturing photochromic articles

1986-12-17

1989-07-25

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523106, 524720, 526204, C08K 535

Patent

active

048514713

ABSTRACT:
A direct casting process for manufacturing a shaped synthetic plastic article, such as an ophthalmic lens, which has photochromic properties, the process comprising incorporating a photochromic spiro-oxazine compound into a mixture comprising a highly reactive polyfunctional monomer and a low amount of a polymerization catalyst, and curing the composition in a mould to form the shaped synthetic plastic article.

REFERENCES:
patent: 4637698 (1987-01-01), Kwak et al.

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