Polyamides and thermosensitive image transfer recording medium using the same

Claim 1

A thermofusible ink layer for a thermosensitive image transfer recording medium, which ink layer comprises a binder agent and coloring agent which is dispersed in the binder agent, said binder agent consisting essentially of a low-molecular weight mixed polyamide selected from the group consisting of (i), (ii), and (iii) wherein (i) is of the formula (A): CO--X--COHN--Y--NH, wherein X is a combination of the radicals --CH 2 -- 7 and --CH 2 -- 8 in a ratio of 20 to 100: 80 to 0 in the polyamide and Y is a combination of the radicals --C 3 H 6 O--C 2 H 4 O--C 2 H 4 OC 3 H 6 )--and --C 3 H 6 OC 2 H 4 O C 3 H 6 -- at a ratio ranging from 20 to 80: 80 to 20 in the polyamide; wherein (ii) is of formula (B): --CO--X--COHN--Y'--NH-- (B) wherein X is as defined above, and Y' is a combination of the radicals C 3 H 6 OC 2 H 4 OC 2 H 4 OC 3 H 6 , C 3 H 6 OC 2 H 4 OC 3 H 6 and C 3 H 6 OC 4 H 8 OC 3 H 6 at a ratio ranging from 5 to 90: 5 to 90: 5 to 90 in the polyamide; and wherein (iii) is of formula (C): CO--X--CO--Y")-- (C) wherein X is as defined above, and Y" is a combination of the radicals --HNC 3 H 6 OC 2 h 4 OC 2 H 4 OC 3 H 6 NH--, --HNC 3 H 6 OC 2 H 4 OC 32 H 4 OC 3 H 6 NH-- and ##STR2## in a ratio ranging from 10 to 10 to 80: 10 to 80 in the polyamide.