Isocyanate-modified polyester-epoxide polymer compositions
US11059933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2019 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Aug 30, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J175/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Isocyanate-modified polyester-epoxide polymer (i-PEEP) compositions are disclosed. The i-PEEP compositions comprise a reaction product of a polyepoxide compound, a polyisocyanate, and a polyester polyol composition. The ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.2 to 2. The i-PEEP index as defined herein is within the range of 100 to 200. The i-PEEP composition has a Tg within the range of −30° C. to 35° C. Low- and elevated-temperature processes catalyzed by bases or Lewis acids for making the i-PEEP compositions are also disclosed. In a simple yet innovative approach, a new class of polymers useful for coatings, elastomers, adhesives, sealants, and other valuable products is assembled from readily available starting materials without reliance on the polyamines typically used to cure epoxy systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.