Iron oxide pigment with super weather resistance and corrosion resistance and preparation method thereof

Abstract

The invention discloses an iron oxide pigment with super weather resistance and corrosion resistance and a preparation method thereof, and belongs to the technical field of coatings. The method comprises the following steps: mixing iron oxide, polyamide resin and anti-ultraviolet resin, carrying out ball milling, mixing with a nano titanium dioxide solution, drying, and curing under ultraviolet rays to obtain the iron oxide pigment. The iron oxide pigment prepared by the invention has excellent weather resistance and corrosion resistance, can resist corrosion of ultraviolet rays to the pigment, prevents cracking, improves the stability and pollution resistance of the pigment and prolongs the service life of the pigment, and the preparation method is simple and convenient, and is suitable for large-scale industrial production.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to an iron oxide pigment with super weather resistance and anticorrosion performance and a preparation method thereof. Background Art

[0002] Iron-based pigments occupy the first place in the production of inorganic color pigments and are currently the most important inorganic pigments in the world. Among them, iron oxide pigments, as one of the oldest pigments, are inorganic pigments with coverage and production volume second only to titanium dioxide, and are the largest pigment. Iron oxide pigments have strong coloring ability and high covering ability, and have good light resistance, weather resistance, acid resistance, alkali resistance and solvent resistance. They are also non-toxic and are widely used in building materials, coatings, inks, plastics, ceramics, papermaking, magnetic recording materials and other industries. At present, when iron oxide pigments are used in outdoor places such as exterior wall coatings and decorations outside buildings, they will be exposed to long-term wind, sun and ultraviolet light, and there are problems such as easy discoloration, reduced strength, instability and easy cracking, which will affect the appearance, durability and service life.

[0003] Therefore, it is necessary to provide an iron oxide pigment with super weather resistance and anticorrosion performance. Summary of the invention

[0004] In view of the above problems existing in the prior art, the first technical problem to be solved by the present invention is to provide a method for preparing an iron oxide pigment with super weather resistance and anti-corrosion performance, which is simple and convenient, and the prepared iron oxide pigment has excellent performance and is suitable for large-scale industrial production. The second technical problem to be solved by the present invention is to provide an iron oxide pigment with super weather resistance and anti-corrosion performance, and the prepared iron oxide pigment has excellent weather resistance and anti-corrosion performance, can resist the erosion of ultraviolet rays on the pigment, prevent cracking, improve the stability and anti-pollution ability of the pigment, and extend the service life of the pigment.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing an iron oxide pigment with super weather resistance and anti-corrosion performance comprises the following steps: firstly mixing iron oxide, polyamide resin and anti-ultraviolet resin, ball milling the mixture, then mixing the mixture with a nano titanium dioxide solution, drying the mixture, and curing the mixture under ultraviolet light to obtain the iron oxide pigment.

[0007] Furthermore, the mass ratio of the iron oxide, the polyamide resin and the anti-ultraviolet resin is 1:5-15:2-8.

[0008] Furthermore, the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone.

[0009] Furthermore, the mass ratio of the acrylic resin to dihydroxybenzophenone is 1:0.1-0.5.

[0010] Furthermore, the rotation speed of the ball mill is 300-800 r / min.

[0011] Furthermore, the mass of the nano titanium dioxide solution is 30% to 60% of the total mass of the ball-milled mixture.

[0012] Furthermore, the wavelength of the ultraviolet rays is 100 to 400 nm.

[0013] Furthermore, the wavelength of the ultraviolet rays is 200 to 400 nm.

[0014] Further, the specific steps are as follows:

[0015] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 5 to 10 hours;

[0016] 2) After the ball milling is completed, add the nano titanium dioxide solution to the mixture, stir evenly, and dry at 100-200°C for 2-5h;

[0017] 3) After drying, place under ultraviolet light for curing for 3 to 5 hours to obtain iron oxide pigment.

[0018] The iron oxide pigment prepared by the method has super weather resistance and anti-corrosion performance.

[0019] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0020] (1) The iron oxide pigment prepared by the present invention has excellent weather resistance and anti-corrosion properties, can resist the erosion of ultraviolet rays on the pigment, prevent cracking, improve the stability and anti-pollution ability of the pigment, and extend the service life of the pigment.

[0021] (2) In the present invention, nano titanium dioxide is covered on the surface of iron oxide particles and cured by ultraviolet light. The preparation method is simple and convenient and suitable for large-scale industrial production. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments.

[0023] Example 1

[0024] The preparation method of iron oxide pigment is as follows:

[0025] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:5:2 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0026] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0027] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0028] Example 2

[0029] The preparation method of iron oxide pigment is as follows:

[0030] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill at a mass ratio of 1:10:2 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone at a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0031] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0032] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0033] Example 3

[0034] The preparation method of iron oxide pigment is as follows:

[0035] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill at a mass ratio of 1:15:2 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone at a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0036] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0037] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0038] Example 4

[0039] The preparation method of iron oxide pigment is as follows:

[0040] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:5 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0041] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0042] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0043] Example 5

[0044] The preparation method of iron oxide pigment is as follows:

[0045] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill at a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone at a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0046] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0047] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0048] Example 6

[0049] The preparation method of iron oxide pigment is as follows:

[0050] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:8 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.1; the ball milling speed is 300r / min;

[0051] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0052] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0053] Example 7

[0054] The preparation method of iron oxide pigment is as follows:

[0055] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill at a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone at a mass ratio of 1:0.5; the ball milling speed is 300r / min;

[0056] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0057] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0058] Example 8

[0059] The preparation method of iron oxide pigment is as follows:

[0060] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0061] 2) After the ball milling is completed, add nano titanium dioxide solution (30% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0062] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0063] Example 9

[0064] The preparation method of iron oxide pigment is as follows:

[0065] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0066] 2) After the ball milling is completed, add nano-titanium dioxide solution (40% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0067] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0068] Example 10

[0069] The preparation method of iron oxide pigment is as follows:

[0070] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0071] 2) After the ball milling is completed, add nano-titanium dioxide solution (50% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0072] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0073] Embodiment 11

[0074] The preparation method of iron oxide pigment is as follows:

[0075] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0076] 2) After the ball milling is completed, add the nano-titanium dioxide solution (60% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0077] 3) After drying, place under 300nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0078] Example 12

[0079] The preparation method of iron oxide pigment is as follows:

[0080] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0081] 2) After the ball milling is completed, add the nano-titanium dioxide solution (60% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0082] 3) After drying, place under 200nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0083] Embodiment 13

[0084] The preparation method of iron oxide pigment is as follows:

[0085] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0086] 2) After the ball milling is completed, add the nano-titanium dioxide solution (60% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0087] 3) After drying, place under 250nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0088] Embodiment 14

[0089] The preparation method of iron oxide pigment is as follows:

[0090] 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill in a mass ratio of 1:10:6 and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 6 hours; the anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone in a mass ratio of 1:0.3; the ball milling speed is 300r / min;

[0091] 2) After the ball milling is completed, add the nano-titanium dioxide solution (60% of the total mass of the ball milled mixture) to the mixture, stir evenly, and dry at 150°C for 3h;

[0092] 3) After drying, place under 400nm ultraviolet light for curing for 3 hours to obtain iron oxide pigment.

[0093] Embodiment 15

[0094] The performance of the iron oxide pigments prepared in Examples 1 to 14 was tested. The same mass of iron oxide pigments as in Examples 1 to 14 was coated on an aluminum alloy panel with a length, width and height of 0.5 mm × 25 mm × 25 mm, with a coating thickness of 0.2 mm, and dried at 75°C for 2 h to obtain an aluminum alloy-iron oxide pigment coating.

[0095] Anti-ultraviolet test: The aluminum alloy-iron oxide pigment is placed in an artificial accelerated aging experiment under 200℃ and 400nm ultraviolet light conditions to test the aging time.

[0096] Oxidation resistance test: The moisture and heat resistance of the aluminum alloy-iron oxide pigment coating was tested according to GJB150.

[0097] Thermal insulation: The aluminum alloy-iron oxide pigment coating was tested using a XIATECHTC3000E portable thermal conductivity meter, and the average value was taken after 20 tests.

[0098] Anti-cracking performance: The initial drying crack resistance of aluminum alloy-iron oxide pigment coating is tested according to standard JG / T298.

[0099] The same mass of the iron oxide pigment prepared in Examples 1 to 14 was coated on a Q235 steel sheet with a length, width and height of 0.5 mm × 25 mm × 25 mm, with a coating thickness of 0.2 mm, and dried at 75°C for 2 h to obtain a steel sheet-iron oxide pigment coating. The steel sheet-iron oxide pigment coating was immersed in a corrosive medium for 1500 h to test the corrosion resistance.

[0100] The performance test results are shown in Table 1 below.

[0101] Table 1 Performance test of iron oxide pigments in Examples 1 to 14

[0102]

[0103] Table 1 is the performance test of the iron oxide pigments of Examples 1 to 14. It can be seen from the table that the iron oxide pigments prepared by the present invention have excellent UV resistance and anti-pollution capabilities, high stability, and extend the service life of the iron oxide pigments outdoors.

Claims

1. A method for preparing an iron oxide pigment having super weather resistance and anticorrosion properties, characterized in that: The iron oxide, polyamide resin and anti-ultraviolet resin are first mixed and ball-milled, then mixed with nano titanium dioxide solution, dried, and cured under ultraviolet light to obtain iron oxide pigment.

2. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The mass ratio of the iron oxide, the polyamide resin and the anti-ultraviolet resin is 1:5-15:2-8.

3. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The anti-ultraviolet resin is a mixture of acrylic resin and dihydroxybenzophenone.

4. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 3, characterized in that: The mass ratio of the acrylic resin to dihydroxybenzophenone is 1:0.1-0.

5.

5. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The rotation speed of the ball mill is 300-800 r / min.

6. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The mass of the nano titanium dioxide solution is 30% to 60% of the total mass of the ball-milled mixture.

7. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The wavelength of the ultraviolet rays is 100-400nm.

8. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 7, characterized in that: The wavelength of the ultraviolet rays is 200-400nm.

9. The method for preparing the iron oxide pigment with super weather resistance and anticorrosion performance according to claim 1, characterized in that: The specific steps are as follows: 1) First, iron oxide, polyamide resin and anti-ultraviolet resin are put into a ball mill and mixed evenly, and grinding beads are added for ball milling; wherein the mass of the grinding beads is 10 times the mass of the mixture, and the ball milling time is 5 to 10 hours; 2) After the ball milling is completed, add the nano titanium dioxide solution to the mixture, stir evenly, and dry at 100-200°C for 2-5h; 3) After drying, place under ultraviolet light for curing for 3 to 5 hours to obtain iron oxide pigment.

10. The iron oxide pigment with super weather resistance and anticorrosion performance prepared by the method according to any one of claims 1 to 9.

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