Coating composition comprising bis-diene oligomers and bis-dieneophile oligomers
AssigneeFord Motor Company
InventorJoseph W. Holubka
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Abstract
Novel thermosetting, solvent-based, crosslinkable and chain-extendable coating compositions are provided. The coating compositions are suitable to be formulated as high solids coating compositions and comprise bis-diene oligomers, bis-dieneophile oligomers, crosslinking agent, organic solvent and, preferably, catalyst. The composition cures at elevated temperature to provide a coating on a substrate, such as sheet steel or the like, which is highly resistant to corrosion, humidity and solvents and provides corrosion protection for the substrate.
Claims11
A novel thermosetting, solvent-based crosslinkable coating composition comprising:
- (A) bis-diene oligomer of number average molecular weight about 300-5000, having the general formula A--R--A', wherein A and A' are the same or different and each comprises a substituted or unsubstituted monovalent diene moiety;
- (B) bis-dieneophile oligomer, being other than said bis-diene oligomer, of number average molecular weight about 400-1200, having the general formula B--R'--B', wherein B and B' are the same or different and each comprises a substituted or unsubstituted dieneophile moiety reactive with said diene moieties A or A' at elevated cure temperature;
- said R and R' being the same or different and each having a bivalent hydrocarbon linking moiety which is substantially unreactive with A, A', B and B';
- and wherein at least one of A--R--A' and B--R'--B' bears crosslinking functionality other than diene and dieneophille functionality;
- (C) crosslinking agent substantially reactive with said crosslinking functionality at said elevated cure temperature;
- and
- (D) organic solvent.
Dependencies are inferred from the claim text.