Epoxy fortifiers based on aromatic amines
US4816533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Aug 7, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Epoxy resins have been found to be fortified (increased strength and modulus yet not brittle) by compounding PA1 (a) a resin-forming polyepoxide, PA1 (b) an amine curing agent for (a), PA1 (c) a fortifier for (a)+(b) comprising the reaction product of PA2 (i) an aromatic amine having an amine group attached to an aromatic ring; and PA2 (ii) non-symmetrical diepoxide; PA1 the reaction product optionally being further reacted with isocyanates or nitriles, in which case (ii) may be at least partly, a monoepoxide; and heat curing the mixture. Strengths as high as 130-150 MPa and modulus increases to as high as 5000 MPa have been attained along with a ductile mode of fracture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.