Fabric softening compositions
US6727220B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2000 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Sep 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D1/667
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a fabric softening composition comprising:i) at least one nonionic fabric, andii) at least one anionic surfactant, andiii) at least one cationic polymerwherein the particles formed from i), ii) and iii) have a net negative charge and the composition comprises no more than 1% by weight non-polymeric cationic surfactant and/or cationic fabric softening compounds. The compositions give good fabric softening without decreasing absorbency, and deposit well without being detrimentally affected by anionic carry-over from the wash. Also provided is a method of depositing a nonionic fabric softening agent from a fabric softening composition, comprising emulsifying the agent with an anionic surfactant and a cationic polymer or emulsifying the agent with an anionic surfactant and then post-dosing an aqueous solution of a cationic polymer to form a particle having an overall negative charge and treating fabric therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.