Method of stabilizing fabric softening compositions
US6303565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | May 12, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2200/50
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a process of improving the viscosity stability upon storage at temperatures of 25.degree. C. or more but below 40.degree. C. of a fabric softening composition comprising: PA1 (a) a 8 to 50% by weight of a cationic fabric softening agent; and PA1 (b) perfume by the inclusion of 3.5% to 15% by weight of an emulsified silicone, based upon the total amount of the composition, which has been emulsified with one or more cationic surfactants. In one aspect, the viscosity of the silicone before emulsification is from 10,000 cSt to 400,000 cSt, preferably from 20,000 cSt to 350,000 cSt, more preferably from 25,000 cSt to 250,000 cSt and the emulsion is a macro-emulsion. In another aspect, the median emulsified silicone droplet size is at least 0.2 .mu.m, preferably at least 0.25 .mu.m, more preferably at least 0.39 .mu.m, preferably also no greater than 25 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.