Epoxy systems having improved fracture toughness
US10081704B2 · kind B2 · utility
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15References
9Claims
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Key dates
| Filing date | Mar 22, 2016 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Apr 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J163/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The disclosure relates to at least one partially reacted product of an isocyanate and an amine (e.g., a reaction product comprising at least one adducted compound). The reaction product comprises polyurea oligomers. The reaction product can be combined with at least one amine in order to formulate a curing agent for epoxy resins wherein the cured epoxy resin has enhanced fracture toughness. The at least partially reacted product does not increase the viscosity of the curing agent and is at least partially soluble in the amine component of the curing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.