| abstract |
The addition of a small amount of alkyl sulfoxide, such as DMSO, to an isocyanate-capped prepolymer is a storage stable prepolymer composition, which is also a specific blocking agent such as a methylenedianiline metal salt coordination complex. A prepolymer composition is provided that is highly activated for curing with a curing agent. The prepolymer / alkyl sulfoxide composition is cured with the blocked curing agent at a lower temperature and / or accelerated rate compared to a similar composition lacking alkyl sulfoxide to provide a high performance polyurethane elastomer. |