Friction inhibiting compound and friction inhibiting composition containing friction inhibiting compound

A friction inhibiting compound comprising a copolymer (A) that includes a polymerizable monomer (a) and a polymerizable monomer (b) as constituent monomers, wherein

• the polymerizable monomer (a) includes alkyl acrylates or alkyl methacrylates represented by the following formula (1),
• the polymerizable monomer (b) is at least one selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates represented by the following formula (2);
• alkyl acrylates and alkyl methacrylates represented by the following formula (3) and aromatic vinyl monomers having 8 to 14 carbon atoms, and
• a composition ratio of the polymerizable monomer (a) and the polymerizable monomer (b) in the copolymer (A), represented by (a):(b), is (10 to 45):(55 to 90) in a molar ratio (provided that a total molar ratio of (a) and (b) is 100), and the weight average molecular weight of the copolymer (A) is 1,000 to 500,000:
• wherein R1 represents an alkyl group having 4 to 18 carbon atoms, and A1 represents a hydrogen atom or a methyl group;
• wherein R2 represents an alkylene group having 2 to 4 carbon atoms, and A2 represents a hydrogen atom or a methyl group:
• wherein R3 represents an alkyl group having 1 to 3 carbon atoms, and A3 represents a hydrogen atom or a methyl group.