PURPOSE: The titled composition, consisting of an acrylic or methacrylic copolymer containing a specific amount of a specified comonomer and a specific bifunctional compound, having improved high-temperature creep characteristics and tackiness and long pot life, and suitable for liquid pressure-sensitive adhesives.

CONSTITUTION: A composition consisting of (A) an acrylic or methacrylic copolymer containing (i) 0.2W30wt% comonomer of formula I (R1 is H or methyl; R2 and R3 are H or 1W4C alkyl; n is an integer 1W4), preferably N,N-dimethylaminoethylmethacrylamide, and/or (ii) a comonomer of formula II (R4 is H or methyl; R5 and R6 are H, hydroxymethyl or alkoxymethyl having 1W4C alkyl part), preferably acrylamide, and (B) a bifunctional compound of formula III [R is a group of formula IV or -(CH2)m-; Hal is Cl, Br or I; m is an integer 0W10], preferably p-xylylene dichloride. The amount of Hal in the component (B) is 0.1W3 equivalents based on the groups of formulas V and VI in the component (A).