Durable coatings and uses thereof
US10696896B2 · kind B2 · utility
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184References
20Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 28, 2017 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Nov 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coatings and compositions for coating particulates are described that can be used as, for example, as proppants to, for example, extract oil and gas from subterranean formations. The coatings can be, for example, an inner coating adjacent to the particulate comprising a polyurethane and an outer coating comprising an polyurethane dispersion; a coating comprising a polyurethane admixed with a polyurethane dispersion; or a polyurethane dispersion layer and is free of an inner polyurethane layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.