| 摘要 |
PURPOSE:To prevent transfer even in the case of adding a large amount of polyorganosiloxane and trouble in conveyance by hardening the uppermost hydrophilic colloid layer containing organopolysiloxane with a polymer hardener. CONSTITUTION:At least one of the uppermost hydrophilic colloid layers contains organopolysiloxane and it is hardened with the polymer hardener. The organopolysiloxane to be used is not especially limited in viscosity, but it is proper to control its viscosity generally to 20-100,000cSt measured at 25 deg.C, and to regulate its molecular eight to 1,000-1,000,000, and it is preferred to add it in an amount of 0.3-30wt% of the colloid of the uppermost hydrophilic colloid layer. the polymer hardener is a compound having a number average molecular weight of >=3,000 and at least 2 hardening groups for reacting with gelatin in the same molecule, and especially preferable ones are polymers having active vinyl groups or their precursor groups combined through long spacers with the main chain of the polymer. |
