Use of copolymers on the basis of unsaturated acids or their derivatives as foam-protecting agent
US6706679B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
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 —COO—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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.