Lcst polymers

Abstract

A description is given of polymers of the general formula in which R1 (identical or different at each occurrence) is hydrogen or a methyl group, X1 and X2=—O—, —S— or —NH— and X1 additionally is a single bond if the first atom in R2 is not a carbon atom, and R2 is one of the radicals indicated below: a) a copolymer radical (Cop) containing at least two structural units —(—O—C2H4)n— (ethylene oxide=EO) and —(—O—C3H6—)n— (propylene oxide=PO) or —(—O—C4H8)n— (butylene oxide=BuO) and —(—O—CH2—)n— (methylene oxide=MeO) in a molar ratio of 5 to 95:95 to 5, in which n (identical or different for each structural unit) is approximately 1 to 1000; b) in which Cop is a copolymer radical as defined in (a), and x=1 to 5 and y=1 to 20; c) in which R is an alkyl group, r=(identical or different at each occurrence) 1 to 1000 and s=1 to 500; d) in which o=10 to 4000 and R3 (identical or different at each occurrence) is hydrogen or alkyl groups having 1 to 5 carbon atoms; e) in which p=5 to 2000; or f) in which q=10 to 4000. A description is also given of processes for their preparation and also of their use for coating particles and nonparticulate substrate surfaces.

Dependencies are inferred from the claim text.