| abstract |
PURPOSE: To strengthen a gelatin film as a phtographic material without deteriorating the phtographic characteristics by using a novel alkylsulfonyl compound. n CONSTITUTION: A compund represented by the general formula is used as a gelatin hardening agent. In the formula, A is N or C, each of R 2 and R 3 is H, alkyl or aryl, R 4 is alkyl or aralkyl, each of R 5 and R 6 is alkyl or acyl, and each of R 7 and R 8 is alkyl, aryl or aralkyl. The compound is synthesized as follows: for example, 5.8g N-hydroxysuccinimide is dissolved in 40ml dioxane, and after adding 5.6g triethylamine, 6.3g methanesulfonyl chloride is added to the soln. little by little with stirring and stirred at room temp. for 1 day. After the reaction, deposited salt is removed by filtration, and residue obtd. by concentrating the filtrate by evacuation is recrystallized with 100ml water. The yield reaches 6.3g, the resulting compound has 152W153°C m.p., and the measured values of an elemental analysis are 31.20% C, 3.55% H and 7.41% N. n COPYRIGHT: (C)1981,JPO&Japio |