公开(公告)号：CA2348410A1

公开(公告)日：2000-05-11

申请号：CA2348410

申请日：1999-10-20

Applicant: ESSILOR INT

Inventor： KEITA GABRIEL ,  TURSHANI YASSIN ,  WEBER STEVE ,  MCCLIMANS PAMELA ANNE

IPC: G02B1/04 ,  C08G18/22 ,  C08G18/38 ,  C08G75/08 ,  C08J5/00 ,  C08G18/18

Abstract: The polymerizable compositions comprise: A) at least one polyiso(thio)cyanat e monomer, and at least one polythiol monomer; or at least one episulfide compound and optionally one or more compounds having two or more functional groups capable of reacting with episulfide groups; and B) as polymerization catalyst, an effective amount of a salt of formula (MPm + Yn-), Y- is an ani on such as the corresponding acid YH has a pKa fulfilling the condition 0.5 < ;= pKa