| 摘要 |
New polymeric mordents capable of fixing acid dyes comprise randomly distributed receiving units of formula (X), (Y) and (Z), where A=unit derived from a copolymerisable monomer able to quench singlet oxygen, B=unit derived from a hydrophobic copolymerisable monomer. n=1- about 12 R1, R2, R3=same of different substd. of unsubstd. 1-8C alkyl, cycloalkyl or substd. or unsubstd. aryl X(-)=anion (I) comprises 5-80 mole% (X), 20-95 mole% (Y), 0-65 mole% (Z) Also claimed are photographic elements contg. (I). Specifically, (I) can be used in an image-receiving element for the dye-diffusion transfer process. A=N-vinylimidazole or 2-methyl-1-vinylimidazole, B=acrylonitrile or methacrylonitrile, n=1, R1, R2, and R3=alkyl, X-=halide, (I) is used as ag. soln. and (X) comprises 15-50 mole%, (Y) 25-60 mole% and (Z) 25-60 mole%.
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