Process for making long fiber-reinforced polyurethanes that contain particulate fillers
US9441067B2 · kind B2 · utility
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4References
11Claims
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Key dates
| Filing date | Mar 11, 2011 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Jan 25, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fiber-reinforced polyurethane structures are made with a polyol composition that contains a particulate filler such as calcium carbonate, in addition to the fibers. The polyol composition and the polyisocyanate composition are selected such that the polymer formed in their reaction has a calculated molecular weight between crosslinks (Mc) of from 300 to 420. The polyisocyanate component contains a urethane-modified MDI and/or a urethane-modified polymeric MDI.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.