Anhydride-based fortifiers for anhydride-cured epoxy resins
US4851484A · kind A · utility
2Cited by
6References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 3, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Mar 3, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/48
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An anhydride-cured epoxy resin (epoxy resin+anhydride curing agent+catalyst) may be fortified (i.e. increased in strength and modulus without being made brittle) by the addition of a carboxylic acid and the reaction product of a carboxylic acid anhydride and a substituted aromatic amine. Strengths as high as 125 MPa and moduli as high as 3500 MPa have been attained, as well as elongations up to 6% and an increase in the ability of the plastic to yield before fracture (ductility), compared to 80 MPa strength, 3000 MPa modulus and 2.4% elongation for the unfortified system (strengths and moduli are tensile).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.