Composition and method of preparation of viscosity-stabilized polyisocyanates comprising triazine groups
US5169878A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Apr 8, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A viscosity-stable polyisocyanate prepared by heating a polyisocyanate containing uretone imine groups and a catalyst under reaction conditions sufficient to produce compounds containing 2-imino-4,6-dioxohexahydro-s-triazine groups is disclosed. The polyisocyanate product so prepared may be used alone or blended with other polyisocyanates or diisocyanates to produce polyurethane, polyisocyanurate, polyamide and related polymers. These polymers, when used to prepare a foam, may exhibit improved dimensional stability and flammability. Also disclosed is a family of isocyanate compounds containing at least one 2-imino-4,6-dioxohexahydro-s-triazine group and having an isocyanate functionality of at least 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.