发明授权
US4101489A Water-soluble phenol/formaldehyde condensation products 失效
水溶性苯酚/甲醛缩合产物

Water-soluble phenol/formaldehyde condensation products
摘要:
Water-soluble condensation products which are obtained by reacting mononuclear phenol/formaldehyde/bisulphite condensation products with formaldehyde and, if appropriate, notrogen-containing compounds of a type which can react with at least 2 equivalents of formaldehyde, can be used as dispersing agents.
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