METHOD FOR PRODUCING POLYURETHANE LENS

摘要

Provided is a method for producing a polyurethane lens by polymerizing a composition containing a polyisocyanate compound and a specific polythiol compound having high reactivity, in which the method suffers less increase in viscosity with the lapse of time and thus is excellent in workability. The method for producing a polyurethane lens, contains polymerizing a composition containing (A) a polyisocyanate compound, (B) a polythiol compound containing a polythiol compound that is obtained through esterification reaction of a polyol compound and thioglycolic acid, (C) a polymerization catalyst, and from 0.001 to 0.5 part by mass per 100 parts by mass in total of the components (A) and (B) of (D) an acidic phosphate ester compound represented by the following general formula (1), in which the method contains a step of preparing the composition by mixing the components (A) and (D), and then adding the components (B) and (C) thereto:;;wherein in the general formula (1), R1 represents an alkyl group having from 1 to 20 carbon atoms or an aryl group having from 6 to 10 carbon atoms; a represents a number of from 0 to 2; and b represents a number of 1 or 2.

主权项

1. A method for producing a polyurethane lens, comprising polymerizing a composition, comprising:
(A) a polyisocyanate compound, (B) a polythiol compound comprising a polythiol compound that is obtained by esterification reaction of a polyol compound and thioglycolic acid, (C) a polymerization catalyst, and from 0.001 to 0.5 part by mass per 100 parts by mass in total of the polyisocyanate (A) and the polythiol (B) of (D) an acidic phosphate ester compound of formula (1), wherein the method comprises preparing the composition by: mixing the polyisocyanate (A) and the acidic phosphate ester compound (D), and then adding the polythiol (B) and the polymerization catalyst (C) thereto: wherein in formula (1),
R1 is an alkyl group having from 1 to 20 carbon atoms or an aryl group having from 6 to 10 carbon atoms;a is a number of from 0 to 2; andb is a number of 1 or 2.