(Meth)acrylic copolymer, adhesive composition and adhesive sheet containing same, and coating material and coated product using same

A (meth)acrylic copolymer (A) having a weight average molecular weight of 1,000 to 1,000,000,

• wherein the (meth)acrylic copolymer (A) satisfies 0.12<X, when X is defined as a half width of a primary scatter peak in small angle X-ray scattering measurement,
• wherein the (meth)acrylic copolymer (A) comprises a constituent unit derived from a macromonomer (a) having a number average molecular weight of 500 to 100,000 and a constituent unit derived from a vinyl monomer (b),
• wherein the macromonomer (a) is represented by Formula (1):
• wherein in Formula (1):
• R is a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group, the alkyl group, cycloalkyl group, aryl group, or heterocyclic group may have a substituent;
• Z is an end group;
• and
• the symbol “ . . . ” represents a main chain moiety comprising two or more constituent units represented by Formula (a′):
• wherein in formula (a′):
• P represents a hydrogen atom, a methyl group, or CH2OH:
• Q is selected from the group consisting of OR, O2CR, halogen, CO2H, COR, CO2R CN, CONH2, CONHR, CONR2, and R′;
• R is selected from the group consisting of a hydrogen atom, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, substituted and unsubstituted heteroaryl, substituted and unsubstituted aralkyl, substituted and unsubstituted alkaryl, and substituted and unsubstituted organosilyl;
• the substituents are the same as or different from each other, and are selected from the group consisting of carboxylic acid, carboxylic acid ester, epoxy, hydroxyl, alkoxy, primary amino, secondary amino, tertiary amino, isocyanato, sulfonic acid, and halogen;
• R′ is selected from the aromatic group consisting of substituted and unsubstituted aryl, substituted and unsubstituted heteroaryl;
• and the substituents are the same as or different from each other, and are selected from the group consisting of carboxylic acid, carboxylic acid ester, epoxy, hydroxyl, alkoxy, primary amino, secondary amino, tertiary amino, isocyanate, sulfonic acid, substituted and unsubstituted alkyl, substituted and unsubstituted aryl, substituted and unsubstituted olefins, and halogen.