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US 4,395,444 AGranted
Thermosetting cationic acrylic latex compositions containing blocked isocyanates
AssigneePPG Industries, Inc.
InventorsSuryya K. Das, Charles M. Kania
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Abstract
An improved cationic thermosetting latex, coating compositions prepared therefrom, articles coated therewith, and the process for preparing the same are disclosed. Compositions of the instant latices formulated with isocyanate curing agents display improved cure; the improvement residing in selection of surfactants, with particular reference to their gegen-ions, which are used therein.
Claims7
A stable thermosetting cationic acrylic latex composition, comprising a blocked isocyanate curing agent and a cationic acrylic latex;
- the cationic acrylic latex is prepared by a process which comprises copolymerizing in an acidic medium, in the presence of a cationic surfactant, ethylenically unsaturated monomers, at least one of which contains an active hydrogen group;
- the cationic surfactant comprises a gegen-ion derived from an aliphatic or aromatic sulfonic acid selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, benzenesulfonic acid, toluenesulfonic acid, phenolsulfonic acid and cresolsulfonic acid.
Dependencies are inferred from the claim text.