Gelatin composition
AssigneeP. Leiner & Sons Limited
InventorsRonald J. Croome, Donald B. Thomas
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Abstract
The invention provides a compound obtained by chemically reacting a gelatin-compatible polymer having a multiplicity of functional groups with an optical brightening agent having only a single functional group reactive with the said functional groups of the polymer. The resulting compound can be mixed with gelatin to give a gelling system for the formation of gels, e.g. coating films, which are resistant to washing or leaching out of the optical brightening agent, thus overcoming the problem of the lack of substantivity of the agent in systems involving a simple mixture of gelatin with optical brightening agent.
Claims11
The product of the chemical reaction of a synthetic polymer having a multiplicity of primary amino groups with an optical brightening agent having a single functional group per molecule for reaction with the said primary amino groups of the polymer, said product being capable of forming a homogeneous aqueous solution with gelatin.
Dependencies are inferred from the claim text.