Metal substrate for a vehicle body
AssigneeDaimlerChrysler AG
InventorsUt Negele, Chris Becher
Life of this patent
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Abstract
The invention relates to a metal substrate with a corrosion-proofing bond coating containing adhesion-conferring polymers, based on organic compounds, as well as a method for applying the bond coating. The metal substrate may be that of a vehicle body. The bond coating contains polybismaleimides as the adhesion-conferring polymers, which may be homopolymers or copolymers of bismaleimides and/or maleimide-terminated oligomers or polymers, which can be copolymers of these compounds and organic compounds with polymerizable functional groups. The bond coating is applied as a solution, emulsion, or dispersion, and fixed by heating or irradiation.
Claims22
A method for corrosion-proofing a metal substrate, comprising:
- applying a bond coating to the substrate, the bond coating consisting essentially of at least one organic adhesion-conferring polymer, said organic adhesion-conferring polymer consisting essentially of at least one polybismaleimide selected from the group consisting of:
- (i) a homopolymer comprising a bismaleimide, (ii) a homopolymer comprising a maleimide-terminated oligomer, (iii) a homopolymer comprising a maleimide-terminated polymer, (iv) a copolymer comprising a bismaleimide, (v) a copolymer comprising a maleimide-terminated oligomer, and (vi) a copolymer comprising a maleimide-terminated polymer wherein the coating is applied from an aqueous solution, an organic solvent solution, a dispersion or an emulsion;
- and
- subsequently stabilizing the bond coating on the substrate surface.
A method for corrosion-proofing a metal substrate, comprising:
- (a) cleaning and de-greasing a substrate;
- (b) applying a bond coating to the substrate, the bond coating consisting essentially of at least one organic adhesion-conferring polymer consists essentially of at least one polybismaleimide selected from the group consisting of:
- (i) a homopolymer comprising a bismaleimide, (ii) a homopolymer comprising a maleimide-terminated oligomer, (iii) a homopolymer comprising a maleimide-terminated polymer, (iv) a copolymer comprising a bismaleimide, (v) a copolymer comprising a maleimide-terminated oligomer, and (vi) a copolymer comprising a maleimide-terminated polymer;
- wherein the coating is applied from an aqueous solution, an organic solvent solution, a dispersion or an emulsion;
- (c) stabilizing the bond coating on the substrate surface by heat or irradiation;
- and
- (d) applying at least one paint coating on the substrate.
A method for corrosion-proofing a metal substrate, comprising:
- applying a bond coating to the substrate, the bond coating consisting essentially of at least one organic adhesion-conferring polymer, wherein the at least one adhesion-conferring polymer comprises at least one polybismaleimide selected from the group consisting of:
- (i) a homopolymer comprising a bismaleimide, (ii) a homopolymer comprising a maleimide-terminated oligomer, (iii) a homopolymer comprising a maleimide-terminated polymer, and (iv) a copolymer comprising a maleimide-terminated polymer;
- wherein the maleimide-terminated polymer is selected from the group consisting of:
- (A) a phenol resin;
- (B) a polyamide;
- (C) a polyether ketone;
- (D) a polyether sulfone;
- (E) a polyester;
- (F) a polydiamide of a polyfunctional acid, with the formula:
- wherein A stands for diamine;
- and
- (G) a polydianhydride of a polyfunctional acid, with the formula:
- wherein A stands for diamine and D for dianhydride;
- wherein the coating is applied from an aqueous solution, an organic solvent solution, a dispersion or an emulsion;
- and
- subsequently stabilizing the bond coating on the substrate surface.
Dependencies are inferred from the claim text.