| 摘要 |
A polyurethane contains a structural unit of formula (XXX). A polyurethane contains a structural unit of formula (XXX), wherein n=2-1000. R 1>=(all optionally) substituted lower alkyl, cycloalkyl, aryl or aralkyl, R 2>-R 4>=H, and groups as defined for R 1>. Independent claims are also included for (1) a polyurethane containing a structural unit of formula (I), wherein R 5>=as for R 1>, (2) a urethane acrylate containing (XXX) as structural units, (3) a urethane acrylate containing a structural unit of formula (II), R 9>=a residue derived from polyisocyanate, R 1>0=as for R 1>, and R 1>1-R 1>3= as for R 2>-R 4>, (4) a urethane alkenyl ether containing a structural unit of formula (XI), wherein R 3>3=as for R 9>, R 3>4= as for R 1>, and R 3>5-R 3>7=as for R 2>-R 4>, (5) a polyester derived from a polyol containing a structural unit of formula (XXX) and 2, 3 or 4 terminal hydroxyl groups, (6) an ester acrylate as in (5), an ester acrylate containing a structural unit of formula (IV), R 1>5, R 1>6, and R 1>7=as for R 1>, (6) a composition containing the ester acrylate and a heat or photo-radical polymerisation initiator, (7) an alkenyl ether containing structural units of formula (V), wherein R 1>8-R 2>0=as for R 1>, (8) a composition containing (7) and polymerisation initiator generating acid upon heating or irradiation, and (9) a composition containing (7) and a compound containing maleiimide groups. |
