| abstract |
A protective coating material comprising (meth)acrylate derivatives of the following formulas ①, ②, ③, ④ and ⑤ within the following ranges of a, b, c, d and e % by weight, respectively: n 5 ≦ a ≦ 80, 0 ≦ b ≦ 30, 0 ≦ c ≦ 30, 5 ≦ d ≦ 50, n 0 ≦ e ≦ 50, provided that a + b + c + d + e = 100 ,n n wherein each of R₁ to R₃ is H or CH₃, and R₄ is CH₂CH₃ or CH₂OH,n n wherein each of R₅ to R₈ is H or CH₃,n n wherein each of R₉ to R₁₄ is H or CH₃, n n n n CH₂=C(R₁₅)COO(CH₂) n OCOC(R₁₆)=CH₂ ④ n n n nwherein each of R₁₅ and R₁₆ is H or CH₃, and n is an integer of from 2 to 10.n n wherein R₁₇ is H or CH₃. |