Polymerizable vinyl compound having polythioether skeleton

Details Polymerizable vinyl compound having polythioether skeleton Polymerizable vinyl compound having polythioether skeleton

1988-03-23

1991-09-10

Henderson, Christopher

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560154, 564153, 564154, C07C32112

Patent

active

050475762

ABSTRACT:
A liquid polymerizable prepolymer having good storage stability is prepared by addition reaction of a polyene compound having a group ##STR1## (R.sub.1 =H or CH.sub.3) with a polythiol compound in the presence of a basic catalyst under such a condition that the ratio of the total number of vinyl groups to the total number of thiol groups is at least 2. The liquid polymerizable prepolymer is used alone or in combination with an aliphatic polyfunctional vinyl monomer having a refractive index of at least 1.45 for the manufacture of an optical element.

REFERENCES:
patent: 2575195 (1951-11-01), Smith, Jr.
patent: 3853728 (1974-12-01), Wrzesinski
Chem. Abst. 108, 187862w.

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