POLY(METH)ACRYLATE， AND COATING COMPOSITION AND COATED ARTICLE CONTAINING SAME

A poly(meth)acrylate represented by formula (1) can impart a hardcoat layer having exceptional scratch resistance， strong impact resistance， and excellent weather resistance， especially weather crack resistance. (R 1-R4 represent hydrogen atoms， etc.; Y represents a divalent hydrocarbon group having a polycyclic structure; X represents a divalent or trivalent saturated hydrocarbon group in which at least one selected from oxygen atoms， etc.， may be interposed; T represents a urethane group (bonds with X by an oxygen atom); Q represents a divalent or trivalent saturated hydrocarbon group in which at least one selected from oxygen atoms， etc.， may be interposed; P represents a (meth)acryloyloxy group; a and c represent the number of Q-T bonded to X， a and c being 1 when X is divalent and 2 when X is trivalent; b and d represent the number of (meth)acryloyloxy groups bonded to Q， b and d being 1 or 2 when a or c is 1， and being 2， 3， or 4 when a is 2; and n represents an integer of 0-6.)