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US 6,187,863 B1Granted
Curable compositions based on functional polysiloxanes
AssigneePPG Industries Ohio, Inc.
InventorsTruman F. Wilt, David N. Walters, James A. Claar, Karen D. Donnelly, Joseph M. Carney, Andrew R. Wolff
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Abstract
Curable compositions containing novel polysiloxanes having various reactive functional groups are disclosed. The curable compositions are useful as both ambient-cured and thermally-cured coating compositions which provide such properties as excellent appearance, mar resistance, acid etch resistance, adhesion, pot life, improved tack time, mar resistance and corrosion resistance.
Claims3
A curable composition comprising:
- (a) an organic polysiloxane containing reactive functional groups, said polysiloxane having the following general structural formula:
- where m is at least 1;
- m′ is 0 to 50;
- n is 0 to 50;
- R is selected from the group consisting of H, OH and monovalent hydrocarbon groups connected to the silicon atoms;
- Ra has the following structure:
- R1—O—X
- wherein R1 is alkylene, oxyalkylene or alkylene aryl;
- and X is oligomeric or polymeric ester-containing moiety comprising terminal OH and COOH functional groups, wherein at least a portion of X contains two or more oligomeric or polymeric ester-containing moieties comprising terminal OH and COOH functional groups;
- and
- (b) a curing agent which contains functional groups reactive with the functional groups of (a).
8 more elements
Dependencies are inferred from the claim text.