Process for making moulded articles of epoxy resin compositions
US5505895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1993 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Dec 14, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2363/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for making a cured plastics moulding by introducing a pre-heated curable resin composition to a hotter mould which is at a temperature high enough to initiate curing of the resin, and supplying further resin under pressure to compensate for shrinkage of the composition wherein the curable resin is a formulation comprising an aromatic glycidyl ether epoxy resin, an inert filler, a quaternary ammonium or phosphonium salt as accelerator, 0.5-1.2 mol per mol epoxy of a saturated cycloaliphatic anhydride and a polycarboxylic acid preferably derived from the reaction of a polyol, this acid being present at a level of 0.05-0.5 mol carboxyl per mol epoxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.