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:5.ltoreq.a.ltoreq.80, 0.ltoreq.b.ltoreq.30, 0.ltoreq.c.ltoreq.30, 5.ltoreq.d.ltoreq.50,0.ltoreq.e.ltoreq.50, provided that a+b+c+d+e=100, ##STR1## wherein each of R.sub.1 to R.sub.3 is H or CH.sub.3, and R.sub.4 is CH.sub.2 CH.sub.3 or CH.sub.2 OH, ##STR2## wherein each of R.sub.5 to R.sub.8 is H or CH.sub.3, ##STR3## wherein each of R.sub.9 to R.sub.14 is H or CH.sub.3,CH.sub.2 .dbd.C(R.sub.15)COO(CH.sub.2).sub.n OCOC(R.sub.16).dbd.CH.sub.2 4wherein each of R.sub.15 and R.sub.16 is H or CH.sub.3, and n is an integer of from 2 to 10. ##STR4## wherein R17 is H or CH.sub.3.

Abstract: A protective coating material comprising polyfunctional (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: ##STR1## wherein each of R.sub.1 to R.sub.3 is H or CH.sub.3, and R.sub.4 is CH.sub.2 CH.sub.3 or CH.sub.2 OH, ##STR2## wherein each of R.sub.5 to R.sub.10 is H or CH.sub.3,CH.sub.2 .dbd.C(R.sub.11)COO(CH.sub.2 CH.sub.2 O).sub.n COC(R.sub.12).dbd.CH.sub.2 3wherein each of R.sub.11 and R.sub.12 is H or CH.sub.3, and n is an integer of from 3 to 14, ##STR3## wherein each of R.sub.13 and R.sub.14 is H or CH.sub.3, and R.sub.15 is H or CH.sub.2 OCOC(R.sub.19).dbd.CH.sub.2 wherein R.sub.19 is H or CH.sub.3,CH.sub.2 .dbd.C(R.sub.16)COO(CH.sub.2).sub.n OCOC(R.sub.17).dbd.CH.sub.25wherein each of R.sub.16 and R.sub.17 is H or CH.sub.3, and n is an integer of from 2 to 10.