Importance

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Abstract

Compounds of formulae I and Ia R--Y--CO--R.sub.3 --CO--O--A (I), R--Y--CO--R.sub.3 --CO--O--CH.sub.2 --A.sub.1 (Ia), wherein R is a radically polymerisable hydrocarbon group, R.sub.3 is a direct bond, linear or branched C.sub.1 -C.sub.22 alkylene, C.sub.3 -C.sub.8 cycloalkylene or C.sub.6 -C.sub.14 arylene, A is the radical, reduced by a hydroxy group in a 2- or 3position, of a cyclic-oligomeric carbohydrate or of a derivative of such a carbohydrate, A.sub.1 is the radical, reduced by a hydroxymethyl group, of a monomeric or linear oligomeric carbohydrate or of a derivative of such a carbohydrate, and Y is --O--, --NH-- or --N(C.sub.1 -C.sub.6 alkyl)-. Homo- and co-polymers having those monomers have, depending upon their composition, hydrophilic, amphiphilic or hydrophobic properties and are able to form hydrogels. The polymers can be used, for example, as surfactants, thickeners, carriers for biologically active ingredients or in the manufacture of contact lenses.

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First Claim