Cast resin for optical use

Details Cast resin for optical use Cast resin for optical use

1992-10-28

1994-08-23

Szekely, Peter

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526314, 526323, C08F 1818, C08F 1824, C08F22226

Patent

active

053408934

ABSTRACT:
A cast resin for optical use is obtained by polymerizing 40 to 89 wt % of a diallyl phthalate component represented by the formula (I) ##STR1## wherein --R.sub.1 is a hydrogen atom or a methyl group, --OR.sub.2 is a dihydric alcohol residue having 1 to 5 carbon atoms and m is an integer of from 0 to 20, 10 to 59 wt % of an alkylene glycol bis-allyl carbonate component represented by the formula (II) ##STR2## wherein --R.sub.4 is a hydrogen atom or a methyl group, --OR.sub.3 is a dihydric alcohol residue having 1 to 10 carbon atoms and n is an integer of from 0 to 10, and 1 to 30 wt % of a vinyl compound represented by the formula (III) ##STR3## wherein --R.sub.5 and --R.sub.6 stand for a hydrogen atom or a group ##STR4## wherein X and Y each indicate a hydrogen atom or a halogen atom other than a fluorine atom.

REFERENCES:
patent: 4930879 (1990-06-01), Iryo et al.
patent: 4948854 (1990-08-01), Amaya et al.

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