Sulfonate ester catalysts in thermosetting compositions
AssigneeFord Motor Company
InventorMohinder S. Chattha
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Abstract
Thermosetting compositions comprising a film forming component bearing or capable of generating hydroxyl functionality, amine-aldehyde crosslinking agent, and a latent reactive catalyst having the formula: ##STR1## wherein R is selected from alkyl or aryl groups and X is selected from 2-hydroxycycloalkyl and aryl substituted 2-hydroxycycloalkyl groups. Preferred compositions within the scope of the invention include high solids, thermosetting coating compositions suitable for automotive applications.
Claims30
In a thermosetting composition comprising a film-forming component and an amine-aldehyde compound, which composition cures by reaction between said amine-aldehyde compound and hydroxyl functionality present on said film-forming material, said hydroxyl functionality being selected from (i) hydroxyl groups present on said film-forming material prior to reaction during cure of said composition, (ii) hydroxyl groups generated in situ on said film-forming material during cure of said coating composition, and (iii) a combination of (i) and (ii),
- wherein the improvement comprises including in said composition a latent reactive catalyst in an amount of between about 0.05 and about 7 weight percent based on the total weight of reactive components, including said latent reactive catalyst, in said coating composition, said latent reactive catalyst having the formula:
- ##STR5## wherein R is selected from alkyl and aryl groups and X is selected from 2-hydroxycycloalkyl and aryl substituted 2-hydroxycycloalkyl groups.
Dependencies are inferred from the claim text.