Patent ID: 7214718

Claim:
A quaternary ammonium salt composition which comprises the following components (M), (D) and (T), wherein the amount of (M) is 15 to 85% by weight, the amount of (D) is 0 to 44% by weight and the amount of (T) is 15 to 85% by weight based on the total amounts of (M), (D) and (T): (M) a monoester quaternary salt represented by the formula (I): wherein R represents a C 5-35 alkyl or alkenyl group, R 1 represents a C 1-4 alkyl or hydroxyalkyl group, n is a number selected from 2 to 4 and X − is an anionic group; (D) a diester quaternary salt represented by the formula (II): wherein each of R, R 1 , n and X − has the same meaning as defined above; and (T) a triester quaternary salt represented by the formula (III): wherein each of R, R 1 , n and X − has the same meaning as defined above.