Radiation-curable paint systems having a lower layer with low-temperature elasticity

• US 20050260405A1
• Filed: 07/16/2003
• Published: 11/24/2005
• Est. Priority Date: 07/23/2002
• Status: Active Grant

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Dietsche, Frank, Weber, Martin, Schwalm, Reinhold, Steininger, Helmut, Jaworek, Thomas
• Granted Patent: US 7,910,197 B2
• Time in Patent Office: Days
• US Class Current: 428/332
• CPC Class Codes: B05D 2701/00 Coatings being able to withstand changes in the shape of the substrate or to withstand welding
• CPC Class Codes: B05D 5/00 Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
• CPC Class Codes: B05D 7/54 No clear coat specified
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31678 Of metal
• CPC Class Codes: Y10T 428/31725 Of polyamide
• CPC Class Codes: Y10T 428/31909 Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31931 Polyene monomer-containing
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31938 Polymer of monoethylenically unsaturated hydrocarbon
• CPC Class Codes: Y10T 428/31989 Of wood

Abstract

A multicoat system on a substrate, comprising at least one radiation-curable coating system (F) and at least one elastic intercoat (D) which is located between substrate and radiation-curable coating system (F) and has a glass transition temperature (T_g) of −20° C. or less.

Claims

1. A multicoat system, on a substrate, comprising at least one radiation-curable coating system (F) and at least one elastic intercoat (D), which is located between substrate and radiation-curable coating system (F), and has a glass transition temperature (T_g) of −

20°

C. or less (measured in the frequency range up to 1000 Hz).

2. The multicoat system as claimed in claim 1, comprising

(F) at least one radiation-curable coating system,

(E) optionally, at least one coat, which is pigmented and/or provided with effect substances,

(D) at least one elastic intercoat (D), having a glass transition temperature (T_g) of −

20°

C. or less,

(C) optionally, at least one coat selected from the group consisting of primer, basecoat, undercoat, coat pigmented or provided with effect substances, and substrate 2,

(B) optionally, at least one elastic intercoat, if coat (C) is a substrate 2, and

(A) substrate 1.

3. The multicoat system as claimed in claim 2, wherein the substrates 1 and/or 2 in the coats (A) and/or (C) are selected from the group consisting of paper, plastics, and metals.

4. The multicoat system as claimed in claim 1, wherein the substrate is selected from the group consisting of PP (polypropylene), SAN (styrene-acrylonitrile copolymers), PC, PMMA, PBT, PA, ASA (acrylonitrile-styrene-acrylate copolymers), ABS (acrylonitrile-butadiene-styrene-copolymers) and their physical mixtures (blends).

5. The multicoat system as claimed in claim 1, wherein the thickness of the elastic intercoat (D) is from 0.5 to 500 μ

m.

6. The multicoat system as claimed in claim 1, wherein at least one compound in the elastic intercoat (D) is selected from the group consisting of thermoplastic elastomers, polyacrylates, and poly-iso-butenes.

7. The multicoat system as claimed in claim 6, wherein at least one compound in the elastic intercoat (D) is selected from the group consisting of styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), styrene-ethylene/butylene-styrene (SEBS) and styrene-ethylene/propylene-styrene (SEPS) block polymers.

8. A substrate coated with a multicoat system as claimed in claim 1.

10. A building component comprising the multicoat system as claimed in claim 1.

11. A building comprising the building component of claim 10.

12. A vehicle component comprising the multicoat system as claimed in claim 1.

13. A vehicle comprising the vehicle component as claimed in claim 12.

14. An aircraft component comprising the multicoat system as claimed in claim 1.

15. An aircraft comprising the aircraft component as claimed in claim 14.

16. The multicoat system as claimed in claim 2, wherein the substrates are selected from the group consisting of PP (polypropylene), SAN (styrene-acrylonitrile copolymers), PC, PMMA, PBT, PA, ASA (acrylonitrile-styrene-acrylate copolymers), ABS (acrylonitrile-butadiene-styrene-copolymers) and their physical mixtures (blends).

17. The multicoat system as claimed in claim 2, wherein the thickness of the elastic intercoat (D) is from 0.5 to 500 μ

m.

18. The multicoat system as claimed in claim 2, wherein at least one compound in the elastic intercoat (D) is selected from the group consisting of thermoplastic elastomers, polyacrylates, and poly-iso-butenes.

9. A method of coating a substrate with at least one radiation-curable coating system (F), which comprises applying, between the substrate and said at least one radiation-curable coating system (F), an elastic intercoat (D) having a glass transition temperature (T_g) of −

20°

C. or less.

19. The method of claim 9, wherein the substrate comprises an interior surface or an exterior surface of a structure.