Low formaldehyde polyacetal containing coating
OwnerPaul R. Baukema, Milton J. Kaelin +2inventors
InventorsPaul R. Baukema, Milton J. Kaelin, Donald W. Waltrip, Kenneth M. Znidersic
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Abstract
The instant invention involves a process for forming a low formaldehyde, essentially color-free coating composition by applying the composition preferably to a wood substrate and curing. The composition comprises a blend of a polyhydroxy-containing polymer, an hexaalkoxymethylolmelamine, a polyacetal having the formula: ##STR1## wherein R is C.sub.1 -C.sub.3 and A is C.sub.1 -C.sub.20 allyl or aryl and an acid catalyst. The coating compositions of the instant invention exhibit extremely low color and give off a significantly reduced amount of formaldehyde when cured in comparison to conventional prior art, acid catalyzed melamine/formaldehyde cured coatings.
Claims7
A coating composition comprising the reaction product of a polyhydroxy-containing polymer, an hexaalkoxymethylolmelamine wherein the alkoxy group is C.sub.1 -C.sub.3, or mixtures thereof, a polyacetal having the general formula:
- ##STR3## wherein R is C.sub.1 -C.sub.3 alkyl, or mixtures thereof, and A is selected from alkyl and aryl groups having from 1-20 carbon atoms and no other groups interferingly reactive with the acetal transetherification reaction or the melamine crosslinking reaction and an acid catalyst.
Dependencies are inferred from the claim text.