Patent GB-918950-A (GB)
Title: Improvements in or relating to the hardening of a colloid composition, specificaliy a gelatin-containing composition
IPC: C07F9/564
Filed: 1960-02-05
Abstract: A colloid composition, such as a polyvinyl alcohol-containing composition, is hardened by adding to the composition, a phosphorus-containing compound of general formulae: <FORM:0918950/IV(a)/1> and <FORM:0918950/IV(a)/2> wherein R1, R2, R3, R4, R5, R6, R7 and R8 each represents a hydrogen atom or an alkyl group either substituted or not, any two or more of which may be the same or which may all be different, X represents a halogen atom, -OR9, <FORM:0918950/IV(a)/3> or <FORM:0918950/IV(a)/4> wherein R9, R10, R11, R12, R13 R14, and R15 each represents a hydrogen atom, an alkyl group either substituted or not, any two of which may be same or which may all be different, and may be the same as or different from one or more of the substituents R1, R2, R3, R4, R5, R6, R7 and R8. Phosphorus-containing compounds specified are triethylenimino phosphate, butylamino diethylenimino phosphate, diethylamino diethylenimino phosphite, ethyl diethylenimino phosphate and ethyl diethylenimino phosphite.  The colloid may be a light sensitive silver halide emulsion and may, as a layer, form part of a photographic element for making positive images according to the silver halide diffusion transfer process, or a back-layer of a photographic light-sensitive material.  Specifications 797,321, 869,632, and 891,221 are referred to.ALSO:A colloid or a gelatin-containing composition which is applied as a layer in a photographic element, is hardened by adding to the composition, before coating as a layer, a phosphorus-containing compound of general formulae:  <FORM:0918950/IV (b)/1> <FORM:0918950/IV (b)/2> wherein R1, R2, R3, R4, R5, R6, R7 and R8 each represents a hydrogen atom or an alkyl group either substituted or not, any two or more of which may be the same or which may all be different, X represents a halogen atom, -OR9, <FORM:0918950/IV (b)/3> <FORM:0918950/IV (b)/4> wherein R9, R10, R11, R12, R13, R14 and R15 each represents a hydrogen atom, an alkyl group either substituted or not, any two of which may be the same or which may all be different, and may be the same or different from one or more of the substituents R1, R2, R3, R4 R5, R6, R7 and R8.  The colloid which may be a polyvinyl alcohol-containing layer, or gelatin-containing composition, may be a light sensitive silver halide emulsion, and may form part of a photographic element for making positive images according to the silver halide diffusion transfer process, an emulsion layer or back layer of photographic light sensitive materials.  Phosphorus containing compounds specified are (i) triethylenimino phosphate, (ii) butylamino diethylenimino phosphate, (iii) diethylamino diethylenimino phosphate, (iv) ethyl diethylenimino phosphate and (v) ethyl diethylenimino phosphite, prepared by the reaction of (i) phosphorus oxychloride, (ii) n-butylamino dichlorophosphate, (iii) diethylamino dichlorophosphite, (iv) ethyl dichlorophosphate, (v) ethyl dichlorophosphite, respectively, with a mixture of ethylenimine, triethylamine and hydroquinone in anhydrous benzene. Specifications 797,321, 869,632 and 891,221 are referred to.