Disclosure of Invention
To overcome the disadvantages of the background art, the first aspect of the present invention provides a high gloss alkyd paint comprising, in weight percent: 40-60wt% of alkyd resin, 10-20wt% of pigment, 10-20wt% of functional filler, 0.5-2wt% of auxiliary agent and the balance of solvent.
The acid value of the alkyd resin is 7-15mg KOH/g.
Preferably, the alkyd resin has an acid number of 7-12mg KOH/g.
Further preferably, the alkyd resin is self-made by the present company, the acid number of the alkyd resin is 7mg KOH/g, and the viscosity of the alkyd resin is 22s (Grignard tube, 25 ℃).
Preferably, the pigment comprises at least one of titanium white, iron oxide red, iron oxide yellow, hansha yellow, dalaman yellow, phthalocyanine blue, phthalocyanine green, and carbon black.
Further preferably, the pigment comprises titanium white, iron oxide red, iron oxide yellow and phthalocyanine blue, and is prepared according to the use requirement.
The auxiliary agent comprises a leveling agent and a dispersing agent, wherein the weight ratio of the leveling agent to the dispersing agent is 1: (0.5-1.2).
Preferably, the auxiliary agent comprises a leveling agent and a dispersing agent, wherein the weight ratio of the leveling agent to the dispersing agent is 1: (0.6-1.0).
Further preferably, the auxiliary agent comprises a leveling agent and a dispersing agent, wherein the weight ratio of the leveling agent to the dispersing agent is 1:0.8.
The leveling agent comprises: at least one of BYK346, BYK333, BYK301, and BYK 307.
Preferably, the leveling agent is BYK333, available from Shandong Wang Biotechnology Co.
The dispersant comprises one or more of Efka-4310, efka-4060, efka-4061, efka-4010, efka-4015, efka-4050 and Efka-4310.
Preferably, the dispersant comprises Efka-4010, available from Shenzhen Fu Tian Ou Zhong bang trade.
The inventors have found that the alkyd resin, pigment and functional filler weight ratio is 11: (3-5): and (2-6), the adhesive force and the glossiness of the prepared alkyd paint can be improved, the compatibility between the alkyd resin and the pigment is presumed to be poor, a phase separation area is easy to appear, surface defects are increased, the glossiness of a paint film is affected to a certain extent, particularly, filler with 4000-6000 meshes is added, the glossiness of the paint film is improved to a certain extent, the filler with a specific particle size possibly has larger specific surface area, the filler can be filled in surface layer defects, and the light scattering capability is reduced. Further research shows that when the functional filler is calcium carbonate, diatomite and talcum powder, the weight ratio of the calcium carbonate to the diatomite is 1: (1-2): (0.5-1), the actual drying time of the alkyd paint can be further reduced, and probably, calcium carbonate can improve the adhesive force of the alkyd paint due to the spherical structure of the calcium carbonate, but excessive calcium carbonate addition reduces the fluidity of the paint, so that the actual drying time is prolonged, the diatomite has a specific porous structure, the speed of entering oxygen into a coating is increased, and the diatomite acts together with talcum powder with a sheet structure, so that the actual drying time of a paint film is effectively reduced. Further researches show that the weight ratio of calcium carbonate, diatomite and talcum powder is 1:1.5: when the water repellent paint is used for forming a film, the drying effect of the alkyd paint can be further improved, and the alkyd paint can be calcium carbonate, diatomite and talcum powder, so that the dispersing effect of the surface layer is good, the acting force between surface groups is improved, the hydrophobic performance is improved, water is repelled in the film forming process, and oxygen is easier to diffuse and permeate into the paint film, so that the faster drying effect is achieved.
Preferably, the alkyd resin, pigment and functional filler are present in a weight ratio of 11: (3-5): (2-6).
Further preferably, the alkyd resin, pigment and functional filler are present in a weight ratio of 29:9:7.
The functional filler comprises at least one of ferric phosphate, zinc phosphate, barium sulfate, calcium carbonate, diatomite, talcum powder, mica, porcelain clay and silicon dioxide.
Preferably, the functional filler comprises calcium carbonate, diatomite and talcum powder, wherein the weight ratio of the calcium carbonate to the diatomite is 1: (1-2): (0.5-1).
Further preferably, the functional filler comprises calcium carbonate, diatomite and talcum powder, wherein the weight ratio of the calcium carbonate to the diatomite to the talcum powder is 1:1.5:0.5.
Preferably, the functional filler mesh is 4000-6000 mesh.
Further preferably, the calcium carbonate is purchased from Lingshou Yongzhuo new materials science and technology Co., ltd, with a mesh number of 4000 mesh; the diatomite is purchased from Lingshou Anda mineral powder factory with 4000 meshes; the talcum powder is purchased from Lingshou Anda mineral powder factory in county, and the mesh number is 4000.
Preferably, the solvent comprises diethylene glycol tertiary butyl ether (CAS: 7580-85-0) and dimethyl sulfide (CAS: 75-18-3), wherein the volume ratio of the diethylene glycol tertiary butyl ether to the dimethyl sulfide is 1: (0.1-0.5).
Further preferred, the solvent comprises diethylene glycol tertiary butyl ether (CAS: 7580-85-0) and dimethyl sulfide (CAS: 75-18-3), the volume ratio of diethylene glycol tertiary butyl ether to dimethyl sulfide being 1:0.2.
In a second aspect, the present invention provides a method for preparing a high gloss alkyd paint, comprising the steps of:
S1, adding part of alkyd resin and part of solvent, uniformly stirring, and adding part of auxiliary agent while stirring to obtain a mixed solution 1;
s2, adding the pigment and the functional filler into the mixed solution 1, and uniformly stirring and mixing to obtain a mixed solution 2;
S3, grinding the mixed solution 2 by a sand mill to obtain a mixed solution 3;
S4, adding the residual alkyd resin and the residual auxiliary agent into the mixed solution 3, adjusting the viscosity by adding a proper amount of residual solvent, checking, filtering and packaging to obtain the alkyd paint.
Preferably, the proportion of alkyd resin is 50-75wt% of the total alkyd resin.
Further preferably, the proportion of alkyd resin is 66% by weight of the total alkyd resin.
Preferably, the stirring speed in the step S2 is 1300-1500rpm, and the stirring time in the step S2 is 40-70min.
Further preferably, the stirring speed in the step S2 is 1400rpm, and the stirring time in the step S2 is 60min.
Preferably, the fineness of the mixed solution 3 is 20-50 μm.
Further preferably, the fineness of the mixed liquid 3 is 30 μm.
The beneficial effects are that:
1. Alkyd resin, pigment and functional filler in a weight ratio of 11: (3-5): and (2-6), the adhesive force and the glossiness of the prepared alkyd paint can be improved.
2. The functional filler is calcium carbonate, diatomite and talcum powder, wherein the weight ratio of the calcium carbonate to the diatomite to the talcum powder is 1: (1-2): (0.5-1), the time for the alkyd paint to dry can be further reduced.
Detailed Description
Example 1
The alkyd paint with high gloss comprises the following components in parts by weight: 58wt% of alkyd resin, 18wt% of pigment, 14wt% of functional filler, 1wt% of auxiliary agent and the balance of solvent.
The alkyd resin is self-made by the company, the acid value of the alkyd resin is 7mg KOH/g, and the viscosity of the alkyd resin is 22s (Grignard tube, 25 ℃).
The auxiliary agent comprises a leveling agent and a dispersing agent, wherein the weight ratio of the leveling agent to the dispersing agent is 1:0.8.
The leveling agent comprises BYK333, which is purchased from Shandong Wang Biotechnology Co.
The dispersant comprises Efka-4010, purchased from Shenzhen Fu Tian Ou Zhong bang trade.
The functional filler comprises calcium carbonate, diatomite and talcum powder; the weight ratio of the calcium carbonate to the diatomite to the talcum powder is 1:1.5:0.5.
The calcium carbonate is purchased from Lingshou Yongzhuo novel material technology Co., ltd, and the mesh number is 4000 mesh; the diatomite is purchased from Lingshou Anda mineral powder factory with 4000 meshes; the talcum powder is purchased from Lingshou Anda mineral powder factory in county, and the mesh number is 4000.
The solvent comprises diethylene glycol tertiary butyl ether (CAS: 7580-85-0) and dimethyl sulfide (CAS: 75-18-3), and the volume ratio of the diethylene glycol tertiary butyl ether to the dimethyl sulfide is 1:0.2.
A method for preparing a high gloss alkyd paint comprising the steps of:
s1, adding part of alkyd resin and part of solvent, stirring at 350rpm for 5min, adding a dispersing agent, and continuing stirring for 5min to obtain a mixed solution 1;
s2, adding the pigment and the functional filler into the mixed solution 1, and uniformly stirring and mixing to obtain a mixed solution 2;
S3, grinding the mixed solution 2 by a sand mill to obtain a mixed solution 3;
And S4, adding the residual alkyd resin, the flatting agent and the residual solvent into the mixed solution 3, adjusting the viscosity to 120S (Grignard tube, 25 ℃), checking, filtering and packaging to obtain the alkyd paint.
The weight percentage of the partial alkyd resin in the whole alkyd resin is 66wt%.
The volume percentage of the partial solvent to the total solvent is 70vol%.
The stirring speed in the step S2 is 1400rpm, and the stirring time in the step S2 is 60min.
The fineness of the mixed liquid 3 was 30. Mu.m (a blade fineness gauge, model: QXD-50).
Example 2
The detailed description is the same as example 1; except that in example 2: the weight ratio of the leveling agent to the dispersing agent is 1:0.8; the volume ratio of the diethylene glycol tertiary butyl ether to the dimethyl sulfide is 1:0.1.
Comparative example 1
The detailed description is the same as example 1; except that in comparative example 1: the alkyd paint with high gloss comprises the following components in parts by weight: 50wt% of alkyd resin, 20wt% of pigment, 8wt% of functional filler, 1wt% of auxiliary agent and the balance of solvent.
Comparative example 2
The detailed description is the same as example 1; except that in comparative example 2: the weight ratio of the calcium carbonate to the diatomite to the talcum powder is 2:0.5:0.3.
Comparative example 3
The detailed description is the same as example 1; except that in comparative example 3: the functional filler comprises calcium carbonate and talcum powder; the weight ratio of the calcium carbonate to the talcum powder is 1:0.5.
Performance test method
The alkyd paints prepared in examples and comparative examples were applied uniformly to the surface of a standard tinplate by brushing to form a paint film having a thickness of 1mm, and surface dry-out tests were performed, and the test data are shown in Table 1.
1. And (3) surface dry test: referring to GB/T1728-79 (88), a cotton ball blowing method is adopted, drying is carried out for a period of time at 25 ℃, a absorbent cotton ball is placed on the surface of a paint film, the absorbent cotton ball is lightly blown by a nozzle along the horizontal direction, if the absorbent cotton ball can be blown away, and cotton threads are not remained on the surface of the film, the surface is considered to be dried, testing is carried out at intervals of 10 minutes, and the actual drying time is recorded.
2. And (3) real-dry test: referring to GB/T1728-79 (88), a cotton ball pressing method is adopted, drying is carried out for a period of time at 25 ℃, a tester and absorbent cotton balls are removed after 30 seconds, if no cotton ball mark and no light loss phenomenon exist on a paint film, actual drying is considered, testing is carried out at intervals of 1 hour, and the actual drying time is recorded.
The alkyd paints prepared in examples and comparative examples were applied uniformly to the surface of a standard tinplate by brushing to form a paint film having a thickness of 1mm, and the paint film was put into an oven at a temperature of 70℃for drying for 2 hours, placed in an environment at a humidity of 50% at 25℃and cooled for 2 hours, and subjected to gloss and adhesion tests. The test data are listed in table 1.
1. Gloss test: with reference to ASTM D523 standard, a BYK Gardner glossmeter was used.
The resulting paint film was tested at a selected 60 ° angle.
2. Adhesion test: the tin plate coated with the paint film was fixed to a piece of movable software in the front-back, left-right, and right directions with reference to GB/T1720-79 (89), and the stylus as a circular motion was scratched through the paint film and was scratched to a coincident circular rolling line texture while the platform was moving, and the position of paint film damage was observed from the circular rolling line texture to test the level of adhesion.
Performance test data
TABLE 1
| Surface dry (min) | Real dry (h) | Gloss level | Adhesion (grade) |
| Example 1 | 100 | 15 | 95 | 1 |
| Example 2 | 110 | 15 | 94 | 1 |
| Comparative example 1 | 140 | 19 | 72 | 2 |
| Comparative example 2 | 140 | 19 | 65 | 2 |
| Comparative example 3 | 150 | 21 | 70 | 2 |