| 摘要 |
A dispersion comprising a particulate solid, a polar organic liquid and a dispersant of formula (1) wherein R is optionally substituted C4-50- hydrocarbyl; X is -O-, -S- or -NR2-; R1 is hydrogen or C1-6, -alkyl which ma y be linear or branched; R2 is hydrogen or C1-6, alkyl which may be linear or branched or a group - (C2H4O)n(AO)p-R1; AO is alkyleneoxy containing 3 or mo re carbon atoms; n is 0 to 30; p is 4 to 100; and p>n; and a is from 1 to 3. Preferred compounds are where R1 is hydrogen, X is -O- and a is 1 and R is t he residue of 2-naphthol.
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