Method for producing composite fiber components
US10865283B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2017 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present disclosure relates to sheet moulding compounds (SMC) and to a method for producing composite fiber components from said SMC, based on a polyurethane reaction mixture consisting of (A) at least one aromatic isocyanate component, (B) 70 to 100 wt % of at least one polyol component having at least 70% secondary OH groups, a number average OH count of 15-500 mg KOH/g and functionality of 1.9-2.5, (C) 0-30 wt % of at least one polyol having a number average OH count of 15-500 mg KOH/g and a functionality of 1.9-2.5, (D) as applicable, short-chain polyol, (E) internal separating agent, (F) a thermolatent catalyst, and (G) as applicable, auxiliary and/or additional substances, wherein the PUR reaction mixture has an initial viscosity of 2,500-14,000 mPas at 23° C. and the ratio of NCO groups/OH groups is 1.35:1-10:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.