Modified cellulose products by bleaching
US4480089A · kind A · utility
9Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1983 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Jun 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Modified cellulose products for use as carrier vehicles in forming cosmetics, pharmaceutical preparations, insecticides, etc. are prepared by treating a minimum weight ratio of about 10:1 of fibrous cellulosic material with an alkali metal or alkaline earth metal hypohalite (e.g. sodium hypochlorite) at a temperature of from about 15.degree. to 60.degree. C. for a period of time sufficient to render the material non-fibrous (i.e. pH drop to about 6 or less), filtering and washing obtain the desired product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.