Water-soluble or water-swellable crosslinked copolymers

Details Water-soluble or water-swellable crosslinked copolymers Water-soluble or water-swellable crosslinked copolymers

2007-04-24

2007-04-24

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

active

11082333

ABSTRACT:
Water-soluble or water-swellable crosslinked copolymers consisting essentially of structural units of the formula 1or a mixture of the structural units of the formula 1 with structural units of the formula 2and structural units of the formula 3where R, R1, R2, R3, Z and n are as defined in the description. These copolymers are crosslinked with compounds which contain at least two olefinic double bonds. These crosslinked copolymers are suitable as thickeners, in particular for cosmetic and pharmaceutical preparations.

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Kosmetische Farbemittel [Cosmetic Colorants] from the Farbstoffkommission der Deutschen Forschungsgemeinschaft [Dyes Commission of the German Research Society], Verlag Chemie, Weinheim, pp. 81-106, 1984.

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