Patent ID: 7705057

Claim:
An aqueous dispersion comprising: (A) water; (B) a polymeric material which is a homopolymer having a repeat unit of general formula and selected from the following: (a) a polymer comprising units of formula IV wherein Ar represents moiety (iv), E and E′ represent oxygen atoms, m represents 0, w represents 1, G represents a direct link, s represents 0, and A and B represent 1; (b) a polymer comprising units of formula IV wherein E represents an oxygen atom, E′ represents a direct link, Ar represents a moiety of structure (i), m represents 0, A represents 1, B represents 0; (c) a polymer comprising units of formula IV wherein E represents an oxygen atom, Ar represents moiety (i)*, m represents 0, E′ represents a direct link, A represents 1, B represents 0; (d) a polymer comprising units of formula IV wherein Ar represents moiety (i), E and E′ represent oxygen atoms, G represents a direct link, m represents 0, w represents 1, r represents 0, s represents 1 and A and B represent 1; (e) a polymer comprising units of formula IV wherein Ar represents moiety (iv), E and E′ represents oxygen atoms, G represents a direct link, m represents 0, w represents 0, s,r,A and B represent 1; (f) a polymer comprising units of formula IV wherein Ar represents moiety (iv), E and E′ represent oxygen atoms, m represents 1, w represents 1, A represents 1, B represents 1, r and s represent 0 and G represents a direct link, wherein moiety (i)* is of structure moiety (i) is of structure and moiety (iv) is of structure wherein said polymeric material has an inherent viscosity (IV) of at least 0.6 and is semi-crystalline; and (C) a surface active agent of the general formula A-L1-X-L2-B, wherein A represents a hydrophobic moiety; L1 represents a linking atom or group or a direct link; X represents a carbonyl or sulphone moiety; L2 represents a linking atom or group or a direct link; and B represents a hydrophilic moiety where said hydrophilic group is an ionic moiety.