Method for the production of a dispersion of colorless chromogen

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

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106 27, 106 31, C09D 1100

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046682910

ABSTRACT:
In the method for the production of a dispersion of colorless chromogenic material useful for the production of a heat-sensitive record material, a colorless chromogenic material and a heat fusible material are admixed together and heated to form a co-melt, the co-melt is dispersed in hot water having a temperature higher than the solidifying point of the co-melt to form an emulsion without causing solidification of the co-melt, and then the emulsion thus obtained is further dispersed in a water having a temperature lower than the solidification point of the co-melt to form a dispersion in which solid particles of the co-melt are dispersed.

REFERENCES:
patent: 4236732 (1980-12-01), Murakami et al.
patent: 4251593 (1981-02-01), Sakamoto et al.

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