High performance polyurethane prepolymer and curing compositions
US10184042B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2016 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Apr 19, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions comprising isocyanate capped polyurethane prepolymers and select mono-benzyl phthalate plasticizers, e.g., 7-(2,6,6,8-tetramethyl-4-oxa-3-oxo-nonyl) benzylphthalate, exhibit better isocyanate stability than prepolymer compositions comprising other plasticizers common in polyurethane systems. Curing compositions comprising these prepolymers, the select mono-benzyl phthalate plasticizers, and methylenedianiline coordination complex curing agents exhibit improved processing characteristics and yield elastomeric polyurethanes with lower compression set, higher break strength and lower color than similar composition comprising plasticizers such as benzoate plasticizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.