Method of producing hydrophilic resin
US6140395A · kind A · utility
20Cited by
4References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0092
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing hydrophilic resin by pulverizing and drying a hydrogel polymer, in which, during pulverization of the hydrogel polymer, the hydrogel polymer is sheared between two spiral rotary blades with different respective feed rates, provided opposite one another. Due to the difference in feed rates of the two rotary blades, one rotary blade overtakes the other, and the hydrogel polymer is caught therebetween and sheared. It is preferable if the temperature of the hydrogel polymer at this time is no less than 40.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.