GEHAERTETE BINDEMITTELSCHICHT.

摘要

(1) New cpd. has formula (I) Z (SO2 CH = CH2)n (I) Z = opt. substd. heteroaromatic ring contg. at least n ring C-atoms and at least one ring-O-, ring-S- or ring-N-atom and n = integer at least 2. (a) 2,5-bis-vinyl-sulphonyl -1,3,4-thiadiazole (I-A), m.pt. 97-99 deg. C. (b) 3,5-bis-vinyl-sulphonyl -4-methyl-1,2,4-triazole, (I-B), m.pt. 125-126 deg. C are specifically claimed. (2) Hardened binder layer is also claimed and consists of a protein, esp. gelatin, hardened by a hetero-aromatic vinyl-sulphone cpd., (A), contg. at least 2 vinyl-sulphonyl gps., each bonded to a C-atom of a hetero-aromatic ring, esp. a cpd. (I).