Process for a polyurethane foam containing fragrance
US4226944A · kind A · utility
61Cited by
12References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1978 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Nov 13, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/905
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Fragrance-emitting articles comprising a polyurethane foam containing a particulate filler and a fragrance material, and a method of making such articles, are disclosed. The method includes the essential steps of pre-mixing particulate filler and fragrance and dispersing the pre-mix in a liquid polyol, before adding the other reaction mixture components, and provides a polyurethane foam having a controlled rate of release of the fragrance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.