发明授权
US4929710A Hydroxycarboxylic acid/Unsaturated aromatic hydrocarbon resin useful as recording material 失效
用作记录材料的羟基羧酸/不饱和芳族烃树脂

Hydroxycarboxylic acid/Unsaturated aromatic hydrocarbon resin useful as
recording material
摘要:
Hydroxycarboxylic acid derivatives of the formula ##STR1## are particularly suitable for use as color developers in recording materials.
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