Process for preparing pulverulent coating composition of practically uniform grain sizes and based on polyamide having at least 10 aliphatically bound carbon atoms per carbonamide group
US4687837A · kind A · utility
5Cited by
1References
11Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 18, 1986 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Polyamide based coating powders having a practically uniform grain size distribution are prepared employing the precipitation procedure provided that the polyamide is dissolved in ethanol at 127.degree. to 135.degree. C. and that the solution is cooled while distilling the ethanol in such a manner that the reactor jacket temperature does not drop below the temperature of the reactor contents until the end of the precipitation stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.