Polyurethane based proppant coatings
US10844280B2 · kind B2 · utility
1Cited by
3References
10Claims
0Family size
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Key dates
| Filing date | Mar 21, 2018 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Mar 21, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.