Back to results
US 4,788,083 AGranted
Tin or bismuth complex catalysts and trigger cure of coatings therewith
AssigneeAshland Oil, Inc.
InventorsLaurence G. Dammann, Gary M. Carlson
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAshland Oil, Inc.
InventorsLaurence G. Dammann, Gary M. Carlson
Estimating the term…
Disclosed is an activatable catalyst which is effective for the reaction of a hydroxyl compound and an isocyanate. Preferably, the catalyst is utilized in the cure of a coating composition of a polyol and a polyisocyanate. The activatable catalyst is activated in the presence of an amine activator or heat and comprises the reaction product of a metal catalyst selected from a tin catalyst, a bismuth catalyst, and mixtures thereof; and a molar excess of a complexing agent. The complexing agent is selected from a mercapto compound, a polyphenol characterized by being reactable with an isocyanate group in the presence of a tertiary amine activator, and mixtures thereof. A single polyol resin may bear both the complexing functionality and the activatable catalyst. Advantageusly, the polyol and polyisocyanate both are aliphatic.
An activatable catalyst effective for the reaction of a hydroxyl compound and an isocyanate compound and being activated in the presence of an amine activator or heat, comprising the reaction product of:
The catalyst of 1 wherein said tin catalyst is selected from the group consisting of stannous acetate, stannic oxide, stannous octoate, dibutyltin dioctoate, tin mercaptides, stannous citrate, stannous oxylate, stannous chloride, stannic chloride, tetra-phenyl tin, tetra-butyl tin, tri-n-butyl tin acetate, di-alkyl tin dicarboxylates, dimethyl tin dichloride, and mixtures;
A catalyzed reaction mixture which comprises:
A catalyzed reaction mixture which comprises:
A method for curing a catalyzed reaction mixture which comprises:
A method for curing a catalyzed reaction mixture which comprises:
A method for enhancing the stability of a catalyzed reaction mixture comprising a polyol, a polyisocyanate, and a metal catalyst selected from a tin catalyst, a bismuth catalyst, and mixtures thereof, which comprises forming said metal catalyst into an activatable catalyst by mixing said metal catalyst with a complexing agent selected from:
Dependencies are inferred from the claim text.