Patent ID: 8057701

Claim:
A trifunctional (meth)acrylate compound represented by general formula (I): wherein: M 1 , M 2 , and M 3 each independently represent a hydrogen atom, a methyl group, or a halogen atom; ring A 1 , ring A 2 , and ring A 3 each independently represent a benzene ring, a cyclohexane ring, a cyclohexene ring, a naphthalene ring, a decahydronaphthalene ring, a tetrahydronaphthalene ring, or a phenanthrene ring, the â€”CHâ• moiety of each of said rings is optionally displaced with â€”Nâ• or the â€”CH 2 â€” moiety of each of said rings is optionally displaced with â€”Sâ€” or â€”Oâ€”; at least one of ring A 1 , ring A 2 , and ring A 3 is a naphthalene ring; Z 1 , Z 2 , and Z 3 each independently represent an alkyl group having 1 to 6 carbon atoms, optionally substituted with a halogen atom or a cyano group, and optionally having a methylene group thereof interrupted by â€”Oâ€” or â€”COâ€”; X 1 , X 2 , and X 3 each independently represent a single bond, â€”COOâ€”, â€”OCOâ€”, â€”(CH 2 ) p â€”, â€”CHâ•CHâ€”, â€”(CH 2 ) p Oâ€”, â€”O(CH 2 ) p â€”, â€”CHâ•CHCH 2 Oâ€”, â€”OCH 2 CHâ•CHâ€”, â€”Câ‰¡Câ€”, â€”(CH 2 ) p COOâ€”, â€”OCO(CH 2 ) p â€”, â€”(CH 2 ) p OCOâ€”Oâ€”, â€”OCOâ€”O(CH 2 ) p â€”, â€”(CH 2 ) q O (CH 2 ) r Oâ€”, or â€”O(CH 2 ) q O(CH 2 ) r â€”; Y 1 and Y 2 each independently represent -L 1 -, -L 1 Oâ€”, -L 1 Oâ€”COâ€”, -L 1 COâ€”Oâ€”, or -L 1 Oâ€”COâ€”Oâ€”; Y 3 represents a single bond, -L 2 -, â€”OL 2 -, â€”Oâ€”COL 2 -, â€”COâ€”OL 2 -, or â€”Oâ€”COâ€”OL 2 -; L 1 and L 2 each independently represent an alkylene group having 1 to 8 carbon atoms optionally interrupted by one to three â€”Oâ€” linkages; a, b, and c represent the numbers of substituents on ring A 1 , ring A 2 , and ring A 3 , respectively, each independently being an integer of (2 u+ 2) or smaller, wherein u is the number of 6-membered rings in each respective ring A 1 , ring A 2 , and ring A 3 ; at least one of a, b, and c is an integer of 1 or greater; p represents an integer of 1 to 8; q and r each independently represent an integer of 1 to 3; and s and t each independently represent 0 or 1, provided that s+tâ‰§1.