Method of improving the freeze resistance of particulate material at low temperatures
US4287236A · kind A · utility
5Cited by
2References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1979 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Aug 10, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J19/002
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The resistance of particulate material to clumping or solidification at below-freezing temperatures is improved by applying to the particles a coating of a polymer emulsion in water which drys to a water-insoluble film. A freeze-point-depressing substance is preferably combined with the emulsion in order to prevent the emulsion itself from freezing at the temperatures to which the particulate material is subjected. It is believed that said coating minimizes the strength of adhesion between the particles and any ice which may form between them and also minimizes the strength of such ice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.