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US 8,178,464 B2Granted
Isocyanate prepolymer catalysts and related curing processes
OwnerAlan D. McInnesinventor
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Abstract
Isocyanate prepolymer catalysts and processes for rapidly curing isocyanate prepolymers are disclosed herein. Substrates coated with the isocyanate prepolymers are treated with a drying agent and water, which combine to form a hydrated catalyst complex. Co-catalysts, such as organo tins, may be used to further enhance the curing rate.
Claims1
A process for forming a dried coating upon a substrate comprising:
- applying a wet coating to a surface of the substrate, the wet coating including an isocyanate prepolymer;
- and
- polymerizing the wet coating by providing an atmosphere including a drying agent/co-catalyst complex and relative humidity in a range of about 40-80%,
- wherein a ratio of the drying agent to the co-catalyst is 95 parts by weight drying agent:
- 5 parts by weight co-catalyst.
2 more elements
Dependencies are inferred from the claim text.