Paint compositions
View Patent ↗A paint comprising a film-forming resin, an organic liquid, a pigment and a dispersant of formula 1, including salts thereof (T-(O-A-CO) n (O-B-CO) m p Z wherein T is H or a polymerisation terminating group; A is C 16-20 -alkenylene; B is C 10-20 -alkylene; Z is the residue of a polyamine or polyimine; n is 2 to 50; m is 0 to 25; and p is not less than 2. Preferred dispersants are derived from poly(ricinoleic acid) and polyethylene imine.
1. A paint comprising a film-forming resin, an organic liquid, a pigment and a dispersant of formula 1, including salts thereof
(T-(O-A-CO) n (O-B-CO) m p Z
wherein
T is H or a polymerisation terminating group;
A is C 16-20 -alkenylene;
B is C 10-20 -alkylene;
Z is the residue of a polyamine or polyimine;
n is 2 to 50;
m is 0 to 25; and
p is not less than 2.
2. A paint as claimed in claim 1 wherein the ratio of n to m is not less than 2:1.
3. A paint as claimed in either claim 1 or claim 2 wherein m is 0.
4. A paint as claimed in claim 1 or 2 wherein —(O-A-CO) is the residue of ricinoleic acid.
5. A paint as claimed in claim 1 or 2 wherein the number of carbon atoms in T is not less than 8 and not greater than 20.
6. A paint as claimed in claim 1 or 2 wherein n+m is not greater than 10.
7. A paint as claimed in claim 1 or 2 wherein p is not greater than 1000.
8. A paint as claimed in claim 1 or 2 wherein the ratio of T-(O-A-CO) m (O-B-CO) n — to Z is from 8:1 to 30:1.
9. A paint as claimed in claim 1 or 2 wherein Z is the residue of polyethyleneimine.
10. A paint as claimed in claim 1 wherein m is 0, —(O-A-CO) is the residue of ricinoleic acid, the number of carbon atoms in T is not less than 8 and not greater than 20, n+m is not greater than 10, p is not greater than 1000, the ratio of T-(O-A-CO) m (O-B-CO) n — to Z is from 8:1 to 30:1 and Z is the residue of polyethyleneimine.