US 6,197,877 B1 · Dispersants

Abstract

A dispersant of general Formula I T—(A)n(B)p—Z (1) wherein T is hydrogen or a polymerisation terminating group; Z is an acidic or basic group or a moiety containing either an acidic or basic group; A and B are each, independently, oxyalkylene carbonyl groups derivable from δ-valerolactone, ε-caprolactone or alkyl substituted ε-caprolactone provided that both are not ε-caprolactone or δ-valerolactone; n and p are integers; and n+p is from 2 to 100; including salts thereof. Specific examples of dispersants are the reaction product of lauric acid, δ-caprolactone, 7-methyl-ε-caprolactone with PEI, the reaction product of lauric acid, ε-caprolactone, δ-valerolactone with PEI and the phosphate of the reaction product of dodecanol, ε-caprolactone and δ-valerolactone.

Claims39

Dependent claims

A dispersant of general Formula 1

T—(A)n(B)p—Z (1)
wherein
T is hydrogen or a polymerisation terminating group;
Z is an acidic or basic group or a moiety containing either an acidic or basic group where the basic group or moiety containing the basic group represented by Z is attached to T—(A)n(B)p− by an amide and/or salt link and where the acidic group is selected from sulphate, sulphonate, phosphate and phosphonate;
A and B are each, independently, oxyalkylene carbonyl groups derived from δ-valerolactone, ε-caprolactone or alkyl substituted ε-caprolactone provided that both are not ε-caprolactone or δ-valerolactone;
n and p are integers;
and
n+p is from 2 to 100;
including salts thereof.

6 more elements

Dependencies are inferred from the claim text.

Dispersants

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Dispersants

Life of this patent

Abstract

Claims39