Homogeneous aqueous fabric softening composition with stilbene sulfonic acid fluorescent whitener
US4497718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1983 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Apr 20, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/664
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a composition and method wherein fluorescent whitening agents are satisfactorily dispersed in fabric softening compositions and viscosity stability of the composition is achieved. The fabric softening and whitening composition comprises: (i) from about 0.5% to about 10% of a cationic surfactant; (ii) from about 0.001% to about 0.3% of a stilbene sulfonic acid fluorescent whitening agent; (iii) from about 0.001% to about 0.5% of a non-ionizable base; and (iv) deionized water. The method for preparing the fabric softening system comprises forming an organic premix of fabric softening cationic surfactant, stilbene sulfonic acid fluorescent whitening agent and non-ionizable base. The organic premix is then added to deionized water containing other fabric softening adjuncts including an acidic pH adjusting agent to obtain pH of 3-6, the combination being stirred to uniformly disperse all components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.