Cyclic polycarbonate-polyepoxide reaction product and method for their preparation
US4746725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1987 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Feb 25, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Resinous compositions are prepared by the reaction of a composition comprising cyclic polycarbonate oligomers with at least one polyepoxide compound, in the presence of a polycarbonate formation catalyst. The cyclic polycarbonate oligomer composition is preferably a mixture of oligomers of varying degrees of polymerization, and the polyepoxy compound is preferably triglycidyl isocyanurate or a bis-epoxy-terminated bisphenol A-epichlorohydrin concentrate. There may also be present a polycarbonate crosslinking agent. The product of the reaction is a crosslinked polycarbonate network. The method is particularly useful in reactive processing operations such as reaction injection molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.