Hydroxypropylmethylcellulose
US4696762A · kind A · utility
18Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Dec 6, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process is used to increase the rate and quality of dispersion of hydroxypropylmethylcellulose (HPMC) in water. The HPMC is dry blended in a fluidized bed by intermittently spraying the HPMC particles with a liquid spray while the particles are in the fluidized state causing the surfaces of the particles to become tacky and the particles to stick to each other. The particles are permitted to dry between spraying intervals and the spraying and drying is continued until agglomerated particles are formed having a moisture content of less than 25% by weight of the agglomerated particle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.