Dual curing conformal coatings
AssigneeCasChem, Inc.
InventorKamlesh Gaglani
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Abstract
Ultraviolet curable polymerizable systems having a built-in secondary curing mechanism are disclosed. The polymerizable coating system is a one component system comprising at least one alkoxysilyl-urethaneacrylate or methacrylate, an acrylate or methacrylate or vinyl ether diluent. The coating systems may include a polymerization initiator of the cationic or free radical photoinitiator type, and a metal catalyst. The coating system is UV curable, and also possesses an additional cure mechanism.
Claims10
An oligomer of Formula I comprising, ##STR10## wherein:
- R represents aryl, alkoxy substituted aryl, aryl substituted alkyl, aryl ether, cyclo-alkyl substituted alkyl, halo-substituted aryl, alkyl substituted aryl alkyl, alkoxy substituted aryl, and (--CH.sub.2) m where M=4-6;
- R.sub.1 represents C.sub.2 -C.sub.10 alkyl;
- R.sub.2 represents H, --CH.sub.3, --C.sub.2 H.sub.5;
- R.sub.3 represents --CH.sub.3, C.sub.2 H.sub.5, --R.sup.1 -- (O(CH.sub.2)S--O.sub.t --R.sup.1 where R.sup.1 =R as defined above, s=2-10 and t=1-10;
- n=2-20, and m=1-3.
An oligomer of formula II ##STR11## wherein R represents aryl, alkoxy substituted aryl, aryl substituted alkyl, aryl ether, cyclo-alkyl substituted alkyl, halo-substituted aryl, alkyl substituted aryl alkyl, alkoxy substituted aryl, (--CH.sub.2).sub.m where m=4-6;
- R.sub.1 represents C.sub.2 -C.sub.10 alkyl,
- R.sub.2 represents H, --CH.sub.3, --C.sub.2 H.sub.5,
- R.sub.3 represents --CH.sub.3, C.sub.2 H.sub.5, --R.sup.1 --(O(CH.sub.2)S--O.sub.t --R.sup.1 where
- R'=R as defined above, s=2-10 and t=1-10;
- n=2-20, and m=1-3.
A urea derivative of Formula (1) ##STR12## where R represents (CH) n=1-6;
- substituted phenyl, cyclohexyl;
- R.sub.1 represents C.sub.2 -C.sub.2 alkyl;
- and
- R.sub.3 represents C.sub.2 -C.sub.4 alkyl.
Dependencies are inferred from the claim text.