Air activated organotin catalysts for polyurethane synthesis

Details Air activated organotin catalysts for polyurethane synthesis Air activated organotin catalysts for polyurethane synthesis

2011-04-05

2011-04-05

McDonough, James E (Department: 1731)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

C502S152000, C502S156000, C502S227000, C502S439000

Reexamination Certificate

active

07919423

ABSTRACT:
This invention relates to an organotin-based catalyst system for polyurethane synthesis that is useful in coatings applications. The catalyst has low activity in the absence of oxygen. When a coating mixture comprising the catalyst is sprayed and/or applied to a substrate as a thin film in air, the catalyst is activated. For solvent-based refinish systems comprising hydroxyl and isocyanate species at high solids levels, the catalyst system therefore provides extended viscosity stability, i.e., pot life.

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