Plastic lens

Details Plastic lens Plastic lens

1981-02-12

1982-08-03

Welsh, Maurice J.

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

Synthetic resins

From carboxylic acid or derivative thereof

526286, 526315, 528246, 528364, 350409, C08G 7500

Patent

active

043428630

ABSTRACT:
A plastic lens composed of a cured product of a mixture or a reaction produce of (A) a compound containing at least 2 unsaturated cycloacetal groups per molecule, (B) a compound containing at least 2 mercapto groups per molecule and (D) an aliphatic polyvinyl compound selected from the group consisting of ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetraacrylate and dipentaerythritol hexaacrylate.

REFERENCES:
patent: 4081591 (1978-03-01), Takiyama et al.
patent: 4225698 (1980-09-01), Medem et al.

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