IMPROVED COATING SYSTEMS, USE THEREOF FOR COATING COMPONENTS AND THUS COATED COMPONENTS FOR AGRICULTURAL AND CONSTRUCTION MACHINES

Abstract

A coating material for producing a coating includes 10 to 70 wt. % of at least one CH acidic compound, 4 to 40 wt. % of at least one vinylogous carbonyl compound, 0.1 to 15 wt. % of at least one latent-basic catalyst, 0.00001 to 10 wt. % of at least one light stabilizer, 0.00001 to 20 wt. % of at least one open time extender, 0.00001 to 20 wt. % of at least one pot life extender, 0.00001 to 70 wt. % of at least one of an inorganic pigment and an organic pigment, and 0.1 to 40 wt. % of at least one corrosion protection agent. Each wt. % of a respective ingredient is based on a total amount of the coating material

Claims

1-25 (canceled)

26. A coating material for producing a coating, the coating material comprising: 10 to 70 wt. % of at least one CH acidic compound; 4 to 40 wt. % of at least one vinylogous carbonyl compound; 0.1 to 15 wt. % of at least one latent-basic catalyst; 0.00001 to 10 wt. % of at least one light stabilizer; 0.00001 to 20 wt. % of at least one open time extender; 0.00001 to 20 wt. % of at least one pot life extender; 0.00001 to 70 wt. % of at least one of an inorganic pigment and an organic pigment; and 0.1 to 40 wt. % of at least one corrosion protection agent, wherein, each wt. % of a respective ingredient is based on a total amount of the coating material.

27. The coating material as recited in claim 26, wherein the at least one CH acidic compound is a compound of the formula ##STR00003## wherein, R is hydrogen, an alkyl radical, or an aryl radical, Y is an alkyl radical, an aralkyl radical, an aryl radical, an alkoxy radical, or an amino group, and Y is an alkyl radical, an aralkyl radical, an aryl radical, an alkoxy radical, or an amino group.

28. The coating material as recited in claim 26, wherein the at least one vinylogous compound is an acrylate, a maleate, or mixtures thereof.

29. . The coating material as recited in claim 26, wherein the at least one latent-basic catalyst is at least one substituted carboxylic acid salt of the formula ##STR00004## wherein, R is hydrogen, an alkyl radical, an aryl radical, or a polymer radical, X.sup.+ is an alkali earth metal cation, an alkaline earth metal cation, or a quaternary ammonium salt of the formula (R).sub.4Y.sup.+ or a phosphonium salt of the formula (R).sub.4Y.sup.+, wherein, Y is nitrogen or phosphorus, R is the same or different, is hydrogen, an alkyl radical, an aryl radical, an aralkyl radical, or a polymer, and R and R form a ring structure or are a polymer.

30. The coating material as recited in claim 26, wherein the at least one light stabilizer is selected from a radial scavenger, a UV absorber, a quencher, and a peroxide decomposer.

31. The coating material as recited in claim 26, wherein the at least one pot life extender is selected from an alcohol comprising up to 6 carbon atoms and an evaporation number below 35.

32. The coating material as recited in claim 26, wherein the at least one open time extender is selected from a basic NH-functional compound with a pK.sub.a value of between 4 and 14.

33. The coating material as recited in claim 26, wherein the at least one of an inorganic pigment and an organic pigment is selected from a titanium dioxide, an iron oxide, a chromium oxide, a chromium titanate, a bismuth vanadate, cobalt blue, a carbon black, pigment yellow 151, pigment yellow 213, pigment yellow 83, pigment orange 67, pigment orange 62, pigment orange 36, pigment red 170, pigment violet 19, pigment violet 23, pigment blue 15:3, pigment blue 15:6, and pigment green 7.

34. The coating material as recited in claim 26, wherein the at least one corrosion protection agent is selected from a tannin derivative, a basic sulfonate, a nitrocarboxylate, a zinc salt of an organic nitric acid, an anti-corrosive pigment, and an active pigment.

35. The coating material as recited in claim 26, wherein the coating material further comprises: up to 25 wt. % of at least one dispersing additive.

36. The coating material according to claim 35, wherein the at least one dispersing additive is selected from a high molecular weight block copolymer with pigment affinic groups, a highly branched polyester, and an acrylate polyester copolymer with pigment affinic groups.

37. The coating material as recited in claim 26, wherein the coating material further comprises: up to 60 wt. % of at least one filler.

38. The coating material as recited in claim 37, wherein the at least one filler is selected from a carbonate, a sulfate, a silicate, and a silica.

39. The coating material as recited in claim 26, wherein the coating material further copprises: up to 50 wt. % of at least one aprotic solvent.

40. The coating material as recited in claim 39, wherein the at least one aprotic solvent is selected from an aliphatic hydrocarbon, a cycloaliphatic hydrocarbon, an aromatic hydrocarbon, a ketone, an ester, an ether, and an ether ester.

41. The coating material as recited in claim 26, wherein the coating material further comprises: up to 10 wt. % of at least one matting agent.

42. The coating material as recited in claim 41, wherein the at least one matting agents is selected from a micronized amorphous silica, a micronized wax, a precipitated wax, and a micronized polymer.

43. A method of using the coating material as recited in claim 26 in a single-layer coating system, the method comprising; providing the coating material as recited in claim 26; and incorporating the coating material into the single-layer coating system.

44. The method as recited in claim 43, wherein the singe-layer coating system is a topcoat for components of at least one of construction machinery and agricultural machinery.

45. A method for coating a component, the method comprising: applying the coating material as recited in claim 26 to a substrate; and curing the coating material for 0.5 to 12 hours at a temperature of between 5 and 50 C.

46. The method as recited in claim 45, wherein the applying of the coating material is performed by a hydraulic spraying method or by a pneumatic spraying method.

47. The method as recited in 45, further comprising; mixing the respective ingredients of the coating material prior to applying the coating material.

48. The method as recited in claim 45, wherein the coating material is applied in to a pre-treated substrate.

49. A component comprising a coating produced from the coating material as recited in claim 26.

50. The component as recited in claim 49, wherein the component is a component of construction machinery or agricultural machinery.

Description

EXAMPLES

[0081] The production of the coating materials is carried out according to coating technology standards, which are known and familiar to the person skilled in the art. The catalyst solution used in Example Recipe 1 is produced in that 42.8 g diethyl carbonate and 26.1 g i-propanol are added to a solution of 17.1 g tetra butyl ammonium hydroxide in 14 g water.

Example Recipe 1

Topcoat

[0082]

TABLE-US-00001 Amount Substance [wt. %] Filler component 1 Malonate functional polyester with a concentration of acidic 27 protons of 5.66 mol/kg relative to the solvent-free polyester, 85% in butyl acetate. Magnesium aluminium polyphosphate 5 High molecular weight block copolymer with pigment affinic 1 groups Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-sebacate 1 Succinimide 1 Butyl acetate 5 Barium sulphate 22 Filler component 2 Di(trimethylolpropane) tetraacrylate 12 Hexanediol diacrylate 3 Pigment yellow 213 4 Titanium dioxide 10 High molecular weight block copolymer with pigment affinic 1 groups Catalyst component Catalyst solution 3 Ethanol 2 Methyl ethyl ketone 3

[0083] To evaluate the shelf life of the coating materials, the pot life and the drying time of Example Recipe 1 were determined. Samples were thereby tested or used to produce a coating after 1 day of storage at 23 C., after 28 days of storage at 40 C., and after 1 year of storage at 20 through 23 C. respectively.

[0084] Determination of pot life: The pot life is determined using a flow cup. In this method, a liquid is filled into a cup with a defined volume, which has a defined nozzle in its bottom. The coating material runs out through the nozzle, wherein the time from the discharge of the liquid jet up until the liquid jet breaks off is measured as the flow time. All preparations and measurements are carried out at a temperature of 23 C. Initially, all components of the coating material are mixed and the flow time of the mixture is immediately measured (initial flow time). The measurement is repeated at regular intervals. The end of the pot life is reached when the flow time is double the initial flow time.

[0085] Determination of drying time: To determine the drying time, a drying time recorder, a drying time measurement device from BYK Gardner, is used. For this purpose, the coating material to be examined is uniformly applied on glass strips with the aid of a film drawer. The glass strips are subsequently laid in a linear recorder. Needles are then applied to the coating and drawn across the drying film at a defined, constant speed. A characteristic drying image of the coating is thereby created, in which the individual time segments show the different curing states: flow or open time, initial trace, film tearing, and surface track. The curing of the coating material thereby begins at the end of the open time, i.e., at the point at which the track etched by the needle remains visible in the applied film. It ends with the surface track, i.e., at the time at which the needle no longer leaves a visible track in the applied film.

[0086] The quality of the coatings which are produced from the differently stored coating materials from Example Recipe 1 was also examined to determine shelf life of the coating material. Gloss and corrosion resistance were determined for this purpose. Samples were used to produce a coating after 1 day of storage at 23 C., after 28 days of storage at 40 C., and after 1 year of storage at 20 through 23 C. respectively. To produce the sample bodies, Example Recipe 1 was applied to treated steel plates using cup guns and cured at room temperature. As a pre-treatment, the steel plates were provided with a silane conversion layer.

[0087] Determination of surface gloss: The gloss of the coating surface is determined as a reflectometer value. The reflectometer value of a sample is defined as the ratio of the light beams reflected by the sample surface and a glass surface with a refractive index of 1,567 in the mirror direction. The measurement values are determined with the aid of a conventional refractometer at an angle of 60.

[0088] Determination of corrosion resistance: Salt spray tests were carried out to evaluate the corrosion resistance. For this purpose, the coatings of the sample bodies were cut with cross shapes down to the metal surface. The sample bodies were subsequently exposed in a spray chamber to a salt spray mist made from a 5% salt solution with a pH value between 6.5 and 7.2 over a time period of 500 hours at 352 C. Afterwards, the sample bodies were rinsed with clear water and subsequently conditioned at room temperature for 1 hour. The damage from infiltration is evaluated. For this purpose, the loose parts of the coating are carefully removed at the cuts. In each case, the broadest area of delamination is determined and indicated in millimetres.

TABLE-US-00002 TABLE Shelf life of Example Recipe 1 1 day, 28 days, 1 year, Storage 23 C. 40 C. 20-23 C. Pot life 3 h 3 h 3 h Open time 20 min 21 min 22 min Surface track ends 247 min 238 min 241 min Gloss 89 90 88 Width of delamination 0.5-2.5 mm 1-2.5 mm 1-2 mm

[0089] As the table shows, the coating materials according to the invention have a high shelf life. After longer storage at increased temperatures, the coating materials themselves do not demonstrate a deterioration in their processability. The coatings produced therefrom also show no impairment to their properties.