Polyalicyclic polyacrylic acid ester derivatives
AssigneeTosoh Corporation
InventorsKenichi Sekimoto, Noriaki Oshima, Yousuke Takahashi, Toru Seita
Life of this patent
Estimating the term…
Abstract
A polyacrylic acid ester derivative having repeating units represented by the formula: ##STR1## (wherein R and R' independently represent a hydrogen atom or a methyl group, R.sub.1 represents a C.sub.1 -C.sub.4 linear or branched alkyl group, A represents a structural unit derived from a group copolymerizable with an acrylic acid ester, and l, m and n are, respectively, from 0.04 to 1.0, from 0 to 0.96 and from 0 to 0.5 in this order, provided that their sum is 1, and when m is not higher than 0.2, n is a number of not higher than 0.01) and having a molecular weight of from about 5,000 to about 1,000,000, is capable of being molded, and is useful as an optical material.
Claims10
A polyacrylic acid ester derivative having repeating units represented by the formula:
- ##STR11## wherein R and R' independently represent a hydrogen atom or a methyl group, R.sub.1 represents a C.sub.1 -C.sub.4 linear or branched alkyl group, A represents a structural unit derived from a group copolymerizable with an acrylic acid ester, and l, m and n are, respectively, from 0.04 to 1.0, from 0 to 0.9and from to 0.5 in this order, provided that their sum is 1, and when m is not higher than 0.2, n is a number of not higher than 0.01 and having a molecular weight of from about 5,000 to about 1,000,000.
Dependencies are inferred from the claim text.