Method for producing free-flowing water-soluble polymer gels
US4666964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Apr 11, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/916
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The instant invention is directed to a method for preparing free-flowing, water-soluble polymer gels comprising: PA1 (a) reducing the size of water-soluble polymer gels by a size-reduction means, so as to produce polymer gel particles which are less than 1/2 inch in their longest dimension; and PA1 (b) adding to the size-reduced polymer gels of Step (a) 0.001 to 20 percent, by weight, of an amphipathic compound, thereby reducing the adhesion of said gel particles to themselves and other substances. The instant invention is also directed to a free-flowing, water-soluble polymer gel admixture comprising: PA1 (a) size-reduced, water-soluble polymer gel particles, wherein said gel particles are less than 1/2 inch in their longest dimension; and PA1 (b) an amphipathic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.