Latent catalysts

Details Latent catalysts Latent catalysts

1991-09-06

1993-02-16

Kight, III, John

Stock material or miscellaneous articles

Composite

Of aldehyde or ketone condensation product

528230, 528232, 528246, 528249, 528265, 528266, 525398, 525401, 525414, 525437, 525441, 524158, 524160, 428528, C08L 3100

Patent

active

051870193

ABSTRACT:
Amino resins, e.g., urea-formaldehyde and melamine-formaldehyde thermosetting resins, are cured with a latent catalyst which is a thermally-decomposable adduct of an aromatic sulfonic acid (e.g., p-toluene sulfonic acid) and a bicyclic oxazolidines (e.g., 1-aza-3,7-dioxa-5-ethylbicyclo (3.3.0) octane. The coating compositions can contain other conventional co-reactants, such as polyols, polyacids, alkyd resins, polyester resins, epoxies, acrylics and the like. Coatings containing the amino resin, co-reactant, and latent catalyst have an acceptable viscosity stability, cure rapidly at temperatures lower than some other latent catalysts, and produce films with no wrinkles.

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