| 摘要 |
A polymerisable composition comprises one or more monomers having the formula: <EMI ID=1.1 HE=25 WI=83 LX=657 LY=650 TI=CF> <PC>wherein:<BR> ```-X is -H or -CH<SB>3</SB>;<BR> ```-Y is -H or a C<SB>1</SB> to C<SB>10</SB> alkyl group;<BR> ```-Z- is -C(=O)- or is a covalent bond;<BR> ```-Ar is a phenyl group which is unsubstituted or substituted with one or more of -CH<SB>3</SB>, -C<SB>2</SB>H<SB>5</SB>, -(n-C<SB>3</SB>H<SB>7</SB>), -(iso-C<SB>3</SB>H<SB>7</SB>), -OCH<SB>3</SB>, cyclohexyl, -F, -Cl, -Br, -I, phenyl, and benzyl; and<BR> ```m is an integer having a value of from 1 to 10, with the proviso that if m is 1 then Z is -C(=O)-. |
