Rhodia Chimie

Harold Schoonbrood

Vance Bergeron

Jean-Pierre Marchand

The invention relates to the use of a copolymer or a mixture of copolymers as foam-protecting agents in detergent or cosmetic formulations, comprising at least one monomer (I) selected from the acids, diacids or unsaturated C3-C5 anhydrides; or at least one monomer (II) selected from ethylene oxide and propylene oxide; or at least one monomer (III) selected from the linear or branched C4-C8 hydrocarbons, comprising at least one ethenoid unsaturation; or at least one monomer (IV) of formula R1 &mdash;COO&mdash;R2, where R1 is a possibly substituted linear or branched C1-C3 hydrocarbon radical; R2 is a linear or branched C1-C4 hydrocarbon radical which is possibly substituted by an anionic radical or a hydroxyl group; and the monomer (IV) further comprises at least one ethenoid unsaturation.

Use of copolymers on the basis of unsaturated acids or their derivatives as foam-protecting agent

Novel water-soluble or water-dispersible grafted copolymers comprising polyvinyl alcohol, vinylpyrrolidone or oxyalkylene oligomer or polymer units and hydrophilic copolymer units derived from ethylenically unsaturated anionic and amphoteric water-soluble monomers.

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Fitzroy North, Australia

Harold Schoonbrood