Storage stable activated prepolymer composition
US10577450B2 · kind B2 · utility
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Key dates
| Filing date | Sep 19, 2016 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/792
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The addition of a small amount of an alkyl sulfoxide, e.g., DMSO, to an isocyanate capped prepolymer provides a storage stable prepolymer composition in which the prepolymer is also highly activated towards curing with certain blocked curing agents such as methylenedianiline metal salt coordination complexes. The prepolymer/alkyl sulfoxide compositions are cured by said blocked curing agents at lower temperatures and/or at an accelerated rate compared to similar compositions lacking the alkyl sulfoxide providing high performance polyurethane elastomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.