| 摘要 |
<p>A protective coating material comprising (meth)acrylate derivatives of the following formulas 1 pi beta , 2 pi beta , 3 pi beta , 4 pi beta and 5 pi beta within the following ranges of a, b, c, d and e % by weight, respectively: 5 & a & 80, 0 & b & 30, 0 & c & 30, 5 & d & 50, 0 & e & 50, provided that a + b + c + d + e = 100, <CHEM> wherein each of R<5> to R<7> is H or CH<7>, and R<8> is CH<6>CH<7> or CH<6>OH, <CHEM> wherein each of R psi to R3/4 is H or CH<7>, <CHEM> wherein each of R¦ to R<5><8> is H or CH<7>, CH<6>=C(R<5> psi )COO(CH<6>)nOCOC(R<5>1/4 )=CH<6> 4 pi beta wherein each of R<5> psi and R<5>1/4 is H or CH<7>, and n is an integer of from 2 to 10. <CHEM> wherein R<5>1/2 is H or CH<7>. t</p> |
