| 摘要 |
A coating composition for the preparation of synthetic resin shaped articles excellent in abrasion resistance and weatherability is described. This composition comprises (a) a polyfunctional monomer mixture comprising (i) 25-75 wt. % of at least one polyfunctional monomer of the formula (I): <IMAGE> (I) +TR <IMAGE> wherein at least three of X11, X12, X13, X22, X23-Xn2, Xn3 and X14 are CH2=CH.C00- and the remaining groups are -OH, and n is an integer of 1-5, (ii) 25-75 wt. % of at least one polyfunctional monomer of the formula (II): <IMAGE> (II) +TR <IMAGE> wherein at least three of the R groups are CH2=CH COO- and each of the remaining is H or -OH, n1, n2, n3, n4, m1, m2, m3 and m4 are integers of 0, 1 or 2, and X is an integer of 1 to 10 and (iii) 0 to 50 wt. % of a monomer containing one acryloyloxy group and having a boiling point of at least 150 DEG C. at normal pressure and a viscosity of not higher than 20 cps/20 DEG C., and (b) 0.01-6.0 wt. parts, based on 100 wt. parts of the polyfunctional monomer mixture, of at least one photosensitizer. The coating composition is coated on a synthetic resin shaped article and then, irradiated with utraviolet rays in air to form a crosslinked coating film having a thickness of 1-30 microns. |
