| 摘要 |
<p>PURPOSE: The present invention provides a paint film which is superior in scratch resistance, weather resistance, stain resistance, chemical resistance, bending durability and impact resistance and is useful as a scratch resistant film or a decorative film. CONSTITUTION: A film obtained by cross-linking a vinyl compound copolymer with polyisocyanate, wherein the vinyl compound copolymer comprises the following monomer units: (A) a mole % of a vinyl compound which has no siloxane structure, nor hydroxyl group; (B) b mole % of a vinyl compound which has a polydimethylsiloxane structure and no hydroxyl group; (C) c mole % of a vinyl compound which has a linear or branched alkyl group having a hydroxyl group, the alkyl group having 1 to 6 carbon atoms; and (D) d mole % of a vinyl compound represented by the following formula: CH 2 =C(R)-COO-Y wherein R is H or CH 3 , and Y is a linear or branched saturated hydrocarbon group with a hydroxyl group at an end and, optionally, may have one or more groups selected from the group consisting of a ring-opened lactone group, i.e., -CO-(CH 2 ) n -O- wherein n is an integer of 4 to 6, a carbonate group, i.e., -O-CO-O-, an ester group, i.e., -CO-O-, an ether group, i.e., -O-, and a urethane group, i.e., -NH-CO-O-, and Y has 40 to 120 carbon atoms, and a to d meet the following equations: a+b+c+d=100, (1) 0<{b/(a+b)}x100‰¦5, (2) 3(c+d)/4‰¦(a+b)‰¦4(c+d), and (3) 4d/3‰¦c‰¦40d.</p> |
