Coating method of polyurethane pultrusion composite material
US11292215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2016 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Feb 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2309/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of coating a polyurethane pultrusion composite material, comprising: a) preparing a polyurethane pultrusion composite material by a polyurethane pultrusion process, the polyurethane pultrusion process comprising: impregnating a fiber reinforcing material with polyurethane resin, and then curing the impregnated fiber reinforcing material in a mold to provide a polyurethane pultrusion composite material; and b) drawing the polyurethane pultrusion composite material to leave the mold, and then on-line applying waterborne coating(s) to the polyurethane pultrusion composite material at a temperature ranging from 30 to 90° C. The method according to the present invention can achieve a good coating to the polyurethane pultrusion composite material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.