Process for preparing epoxy resins
US10899873B2 · kind B2 · utility
0Cited by
8References
14Claims
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Key dates
| Filing date | Sep 12, 2017 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Sep 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J163/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An epoxy oligomerization catalyst can be employed to prepare an epoxy resin employing a method including admixing a first epoxy resin having a first epoxy equivalent weight of from about 100 to about 600 with a diphenolic compound, and a catalyst, thereby forming a second epoxy resin having a second epoxy equivalent weight of from about 200 to about 10,000; wherein the catalyst is a guanidinium catalyst. The second equivalent weight is greater than the first equivalent weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.