Toughening agent for epoxy thermoset
US9657118B2 · kind B2 · utility
0Cited by
6References
10Claims
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Key dates
| Filing date | Dec 19, 2012 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Jul 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An epoxy thermoset that includes a reaction product of a toughening agent prepared from a reaction of a first epoxy resin and a polyether polyamine, a second epoxy resin and a liquid amine hardener for the toughening agent and the second epoxy resin. The toughening agent is an adduct of the second epoxy resin and the polyether polyamine. The polyether polyamine phase of the toughening agent separates to form particles in the epoxy thermoset, where the particles have a volume average diameter in a range from 20 nanometers to 200 nanometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.