Plastic lens and method of manufacturing thereof

Details Plastic lens and method of manufacturing thereof Plastic lens and method of manufacturing thereof

1986-08-18

1988-05-17

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526322, 5263231, 526 75, C08F 1802, C08F 1818

Patent

active

047451688

ABSTRACT:
A plastic lens having a refractive index of not less than 1.55, comprising a polymer formed from dimethallyl phthalate as major monomeric constituent and, if necessary, one or more monomers represented by the general formula ##STR1## wherein R.sub.1 and R.sub.2 represent each a hydrogen atom or methyl group and m and n represent each an integer of from 0 to 3, or ##STR2## wherein R.sub.3 and R.sub.4 represent each a hydrogen atom or methyl group and n represents an integer of from 2 to 9. A method for manufacturing such a lens is also disclosed.

REFERENCES:
patent: 2631141 (1953-03-01), Swern et al.
patent: 3385836 (1968-05-01), Mednick et al.
patent: 4393184 (1983-07-01), Tauni et al.
patent: 4522993 (1985-06-01), Jasagawa et al.

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