(Meth)acrylic copolymer, resin composition, molded body of same, and method for producing molded body

A (meth)acrylic copolymer, which contains an aromatic (meth)acrylate unit (a1), a methyl (meth)acrylate unit (a2) and a (meth)acrylate unit (a3) represented by formula (1) below, wherein:

• the mass ratio (a1)/(a2) is from 5/95 to 99/1;
• the content of the unit (a3) is 0.1 to 10 parts by mass relative to 100 parts by mass of the total of the units (a1) and (a2);
• and the unit (a1) is different from the unit (a3):
• wherein:
• X represents a halogen atom or a C1-10 alkyl group;
• R1 represents a C1-10 alkyl group;
• R2 represents a single bond, a C1-10 alkylene group, a C1-10 oxyalkylene group or a C1-10 hydroxyoxyalkylene group;
• R3 represents a hydrogen atom or a methyl group;
• a represents an integer of 0 to 3;
• b represents an integer of 0 to 4;
• wherein the unit (a1) contains a structural unit represented by formula (5):
• wherein in formula (5):
• R11 and R12 each independently represent a C1-10 linear alkyl group, a C3-10 branched alkyl group, a C3-10 cyclic alkyl group, a C1-10 linear alkoxy group, a C3-10 branched alkoxy group, a C3-10 cyclic alkoxy group, a halogen atom, a phenyl group or a phenylphenyl group;
• R13 represents a branched or unbranched C2-6 alkylene group, a C6-10 cycloalkylene group or a C6-10 arylene group;
• R14 represents a hydrogen atom or a methyl group;
• i represents an integer of 1 to 3;
• j represents an integer of 0 to 2;
• and
• both s and t are 0.

A resin composition which contains a (meth)acrylic copolymer (A) and a polycarbonate-based resin (B), wherein:

• the (meth)acrylic copolymer (A) contains an aromatic (meth)acrylate unit (a1), a methyl (meth)acrylate unit (a2) and a (meth)acrylate unit (a3) represented by formula (1) below;
• the mass ratio (a1)/(a2) is from 5/95 to 99/1;
• and the unit (a1) is different from the unit (a3):
• wherein:
• X represents a halogen atom or a C1-10 alkyl group;
• R1 represents a C1-10 alkyl group;
• R2 represents a single bond, a C1-10 alkylene group, a C1-10 oxyalkylene group or a C1-10 hydroxyoxyalkylene group;
• R3 represents a hydrogen atom or a methyl group;
• a represents an integer of 0 to 3;
• and
• b represents an integer of 0 to 4;
• and
• wherein the content of the unit (a3) is 0.1 to 4 parts by mass relative to 100 parts by mass of the total of the units (a1) and (a2);
• wherein the unit (a1) contains a structural unit represented by any one of formula (3) to formula (5):
• wherein in formula (3) to formula (5):
• Y represents a single bond, or a divalent group selected from the group consisting of —C(R15)(R16)—, —C(═O)—, —O—, —OC(═O)—, —OC(═O)O—, —S—, —SO—, —SO2— and any combination thereof;
• R4 and R5 each independently represent a C1-10 linear alkyl group, a C3-10 branched alkyl group, a C3-10 cyclic alkyl group, a C1-10 linear alkoxy group, a C3-10 branched alkoxy group, a C3-10 cyclic alkoxy group, a halogen atom, a phenyl group or a phenylphenyl group;
• R6 represents a branched or unbranched C2-6 alkylene group, a C6-10 cycloalkylene group or a C6-10 arylene group;
• R7 represents a hydrogen atom or a methyl group;
• R8 represents a C1-10 linear alkyl group, a C3-10 branched alkyl group, a C3-10 cyclic alkyl group, a C1-10 linear alkoxy group, a C3-10 branched alkoxy group, a C3-10 cyclic alkoxy group or a halogen atom;
• R9 represents a branched or unbranched C2-6 alkylene group, a C6-10 cycloalkylene group or a C6-10 arylene group;
• R10 represents a hydrogen atom or a methyl group;
• R11 and R12 each independently represent a C1-10 linear alkyl group, a C3-10 branched alkyl group, a C3-10 cyclic alkyl group, a C1-10 linear alkoxy group, a C3-10 branched alkoxy group, a C3-10 cyclic alkoxy group, a halogen atom, a phenyl group or a phenylphenyl group;
• R13 represents a branched or unbranched C2-6 alkylene group, a C6-10 cycloalkylene group or a C6-10 arylene group;
• R14 represents a hydrogen atom or a methyl group;
• R15 and R16 each independently represent a hydrogen atom, a C1-10 linear alkyl group, a C3-10 branched alkyl group, a C3-10 cyclic alkyl group, a C1-10 linear alkoxy group, a C3-10 branched alkoxy group, a C3-10 cyclic alkoxy group, a phenyl group or a phenylphenyl group, or R15 and R16 may be bonded to each other to form a C3-10 cyclic alkyl group together with a carbon atom to which they are attached;
• m represents an integer of 0 to 10;
• n represents an integer of 1 or 2;
• k represents an integer of 1 to 3;
• l represents an integer of 0 to 2;
• i represents an integer of 1 to 3;
• j represents an integer of 0 to 2;
• p represents an integer of 0 to 4;
• q represents an integer of 0 to 5;
• r represents an integer of 0;
• s represents an integer of 0;
• and
• t represents an integer of 0.