Composition for slow release of volatile ingredients at _high temperature; and article comprising same
US4184099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1978 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Jun 8, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2209/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Bodies which are formed compositions of Versalon.RTM. type polyamide resin containing from about 35% up to about 70% by weight of highly volatile materials such as perfumes, odorants, insecticides, bactericides, and animal repellents which are able to act in a very diluted vapor state in the air for relatively long periods of time, are described. The highly volatile substances are released in a controlled manner over a long period of time. The molecular weight of the resin is between 9,000 and 12,000, and its softening point varies from 120.degree. C. up to 400.degree. C. In addition, articles are described incorporating said composition and, as part of the instant invention, a light bulb coated with a toroidal article which consists essentially of said composition, is included. The method of our invention comprises heating Versalon.RTM. polyamide resin (Note 1) having a molecular weight of from 9,000 up to 12,000 until it is pourable and stirrable, e.g., to a temperature of between 120.degree. C. and 400.degree. C., and then blending from 35 up to 70% of a highly volatile ingredient such as a perfume oil, an insecticide composition, a bactericide composition, or an animal repellen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.