Electrostatic coating method utilizing mixture of rough and spheroidized resin particles
US4154871A · kind A · utility
13Cited by
20References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Aug 19, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Improved electrostatic coating is obtained by heat-rounding or spheroidizing pulverized resin particles so that 30-80% take on a glossy appearance while the rest remain rough to provide a mixture that is free flowing at ordinary room temperature and would pass through a screen having openings not exceeding 200 micrometers. Preferably each particle of the mixture is a blend of thermosetting resin and curing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.