Composition comprising a copolymer at least two charged blocks and type of opposite charge
US6559233B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Jul 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A subject of the present invention is an aqueous composition combining at least one block copolymer (A) comprising, in the pH and temperature conditions of the composition, at least two polyionic blocks of the same charge and at least one non-charged block, with at least one ionic or polyionic (B) type with an opposite charge to that of the said polyionic blocks, in the pH conditions of the composition; type (B) being chosen from among ions carrying at least two charges, surfactants carrying at least one charge, oligomers and/or polymers carrying at least two charges and/or mineral particles carrying at least two charges; the block copolymer (A) content being such that the viscosity of the composition is at least greater than three times that of an aqueous solution of block copolymer (A) and to that of an aqueous solution of type (B), in the same temperature, pH and concentration conditions.The present composition, before its use or during its use, is in the form of a gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.