Oily polyurethane ultra-matte skin-feeling white finish and preparation method thereof

Abstract

The invention relates to the technical field of oily paints, in particular to an oily polyurethane ultra-matte skin-feeling white finish and a preparation method thereof. The oily polyurethane ultra-matte skin-feeling white finish is prepared from the following components in parts by weight: 25 to 35 parts of oily polyurethane film forming matter, 0.2 to 0.5 part of defoaming agent, 0.5 to 1.5 parts of wetting agent, 0.2 to 2 parts of flatting agent, 5 to 10 parts of PMMA (Polymethyl Methacrylate) microspheres, 5 to 8 parts of matting powder, 2 to 5 parts of CAB (Cellulose Acetate Butyrate) liquid, 20 to 35 parts of oily polyurethane white paste, 0.5 to 3 parts of functional aid, 0.5 to 1.5 parts of hand feeling wax powder and 4 to 12 parts of solvent. The oily polyurethane super-matte skin-feeling white finish paint provided by the invention has excellent performance, good construction performance and unique hand feeling, and the smooth super-matte skin-feeling white finish paint is far better than products of the same type.

Description

Technical Field

[0001] The invention relates to the technical field of oily coatings, in particular to an oily polyurethane special matte skin-feel white topcoat and a preparation method thereof. Background Art

[0002] In recent years, oil-based paint technology has developed rapidly, and its main advantages are good film toughness, good adhesion, and good chemical corrosion resistance. However, as paint technology is deeply applied in various fields, its customers have put forward higher requirements for its performance: not only the film toughness, adhesion, and good chemical corrosion resistance are required, but also the hand feel is put forward higher requirements. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an oily polyurethane special matte skin-feel white topcoat and a preparation method thereof. The oily polyurethane special matte skin-feel white topcoat provided by the present invention is both scratch-resistant and has a smooth skin-feel effect, has a unique special matte skin-feel effect, and is also odorless and environmentally friendly. The product is mainly used in the high-end furniture, interior door and custom furniture industries that have requirements for both environmental protection and paint film performance.

[0004] In a first aspect, the present invention provides an oily polyurethane extra matte skin-feel white topcoat, comprising the following components in parts by weight: 25-35 parts of oily polyurethane film-forming material Defoaming agent 0.2~0.5 parts Wetting agent 0.5~1.5 parts Leveling agent 0.2~2 parts PMMA microspheres 5-10 parts Matting powder 5-8 parts 2-5 parts CAB liquid 20-35 parts of oily polyurethane white paste Functional additives 0.5~3 parts 0.5~1.5 parts of hand wax powder 4 to 12 parts of solvent.

[0005] The oily polyurethane special matte skin-feel white topcoat provided by the present invention has excellent performance and good construction performance, belongs to the smooth special matte skin-feel white topcoat, has a unique hand feel, and far exceeds the same type of products. The oily polyurethane special matte skin-feel white topcoat can provide a smooth and delicate hand feel effect, provide a CAB with solvent release and powder arrangement and orientation functions, provide covering power, provide scratch resistance and smooth hand feel for the paint film, and provide the function of adjusting the viscosity and storage state of the main agent.

[0006] Preferably, the oily polyurethane film former is 3811AB-80 synthetic fatty acid resin. The oily polyurethane film former used in the present invention can be well cross-linked to form a film.

[0007] More preferably, the defoamer is AC300. The defoamer provided by the present invention improves the defoaming effect, and the preferred AC300 can provide more excellent defoaming performance and solve the defoaming problem of thick coating.

[0008] More preferably, the wetting agent is a mixture of phosphate esters. The wetting agent provided by the present invention can provide a better wetting effect on the substrate and the powder. The preferred wetting agent in the present invention is EFKONA-PF604.

[0009] More preferably, the leveling agent is a polyether modified polydimethyl leveling agent. The leveling agent provided by the present invention uses a smooth surfactant that can provide a hand feel. The ideal leveling agent in the present invention is BYK333 from BYK, tego450, 410 from Evonik, etc.

[0010] Further preferably, the PMMA microspheres are nanocellulose crystals with a width of 5 to 75 nm and a length of 50 to 500 nm and polymethyl methacrylate with an average particle size of less than 25 nm, preferably PMMA microspheres GPI-04. The present invention uses nanomaterial PMMA microspheres to make the oily polyurethane special matte skin-feel white topcoat have a unique special matte skin-feel effect.

[0011] Preferably, the matting powder is silicon dioxide matting powder, preferably Grace SY-7000.

[0012] More preferably, the matting powder is Grace SY-7000.

[0013] Preferably, the content of the CAB liquid is 15-25%.

[0014] More preferably, the CAB fluid is CAB-381-2.

[0015] Preferably, the functional additive is Tisbalon 4200-10 rheological additive.

[0016] Preferably, the titanium dioxide content in the oily polyurethane white slurry is 50% to 70%, and the grinding fineness is ≤15 μm.

[0017] Preferably, the hand wax powder is 1400SF. The hand wax powder of the present invention is 1400SF of Lubrizol, which is a modified wax powder that is not only scratch-resistant but also provides a smooth hand feel.

[0018] Preferably, the solvent is an oily organic solvent.

[0019] More preferably, the solvent is selected from one or more of butyl acetate, cyclohexanone, and methyl isobutyl ketone.

[0020] The present invention optimizes the type and amount of each component, which not only meets the environmental protection standards, but also the interaction of each component makes the oily polyurethane extra matte skin-feel white topcoat have better scratch resistance and skin feel effects, and the paint film performance is also greatly improved, which can better meet the performance requirements of high-end furniture and high-end customized furniture.

[0021] In a second aspect, the present invention provides a method for preparing the oily polyurethane extra matte skin-feel white topcoat, comprising mixing an oily polyurethane film former, a defoamer, a wetting agent, a leveling agent, PMMA microspheres, a matting powder, a CAB liquid, an oily polyurethane white slurry, a functional additive, a hand wax powder and a solvent to obtain an oily polyurethane extra matte skin-feel white topcoat.

[0022] Preferably, the oily polyurethane film-forming material and the oily polyurethane white slurry are mixed to obtain a first premix, the wetting agent, the defoaming agent and the leveling agent are mixed to obtain a second premix, the first premix and the second premix are mixed, stirred for 10 to 20 minutes, the matting powder, PMMA microspheres and functional additives are added, dispersed at high speed for 20 to 30 minutes, the CAB liquid and the solvent are added and dispersed at medium speed (above 800 rpm) for 10 to 15 minutes, and the fineness is checked with a 50um fineness meter to be qualified ≤25μm.

[0023] The beneficial effects of the present invention are at least: 1. The present invention adopts odorless resin, which has little odor, little irritation to human body, and low VOC, and meets environmental protection standards.

[0024] 2. The paint film of the product of the present invention has high hardness after drying, good scratch resistance and unique skin feel effect.

[0025] 3. The oily polyurethane special matte skin-feel white topcoat of the present invention is suitable for painting various high-end indoor wooden furniture and high-end custom-made furniture. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the following examples, the raw materials used are all known commercially available products.

[0028] In the embodiment of the present invention, the CAB liquid used is CAB-381-2 with a content of 20%. The PMMA microspheres of the micro-nano material are GPI-04. The oily white slurry is an oily polyurethane titanium dioxide slurry with a titanium dioxide content of 60%, and the grinding fineness is ≤15μm. The hand wax powder is Lubrizol 1400SF. The oily film-forming resin is Covestro's 3811AB-80 synthetic fatty acid resin. The silica matting powder is Grace SY-700.

[0029] Example 1 The present embodiment provides an oily polyurethane special matte skin-feel white topcoat, and its composition and specific preparation process are as follows: first, pour 25kg of oily film-forming resin and 35kg of oily white slurry into a dispersion kettle, add 0.2kg of AC300 defoamer, 0.2kg of BYK333 leveling agent and 1kg of EFKONA-PF604 wetting dispersant into the dispersion container under low-speed stirring, and add 7kg of silica matting powder and 8kg of micro-nano material PMMA microspheres, 1kg of hand wax powder, and 3kg of Tisbalon 4200-10 rheological additive after high-speed stirring. Use a 50um fineness meter to check that the fineness is qualified ≤25μm and free of impurities, then add 3kg of CAB liquid, 6.6kg of butyl acetate, and 4kg of cyclohexanone organic solvent into the kettle and disperse at medium speed (900 rpm) for 12 minutes, and use a 50um fineness meter to check that the fineness is qualified ≤25μm.

[0030] After the product is qualified, filter the package with a 200-mesh filter and put on the sealing cover.

[0031] The performance test of Example 1 is carried out, and the test results are shown in Table 1.

[0032] Table 1 Performance test

[0033] The above examples illustrate that the oily polyurethane extra matte skin-feel white topcoat in the present invention complies with the national and industry standards GB 18581-2020 and GB / T 23997-2009, and its scratch resistance and skin-feel effects are very unique and excellent, and the paint film performance can meet the performance requirements of high-end furniture and high-end customized furniture.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oily polyurethane special matte skin-feel white topcoat, characterized in that: By weight, it includes the following components: 25-35 parts of oily polyurethane film-forming material Defoaming agent 0.2~0.5 parts Wetting agent 0.5~1.5 parts Leveling agent 0.2~2 parts PMMA microspheres 5-10 parts Matting powder 5-8 parts 2-5 parts CAB liquid 20-35 parts of oily polyurethane white paste Functional additives 0.5~3 parts 0.5~1.5 parts of hand wax powder 4 to 12 parts of solvent.

2. The oily polyurethane special matte skin-feel white topcoat according to claim 1, characterized in that: The oily polyurethane film-forming material is 3811AB-80 synthetic fatty acid resin.

3. The oily polyurethane special matte skin-feel white topcoat according to claim 1 or 2, characterized in that: The defoamer is AC300.

4. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 3, characterized in that: The wetting agent is a mixture of phosphate esters.

5. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 4, characterized in that: The leveling agent is a polyether modified polydimethyl leveling agent.

6. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 5, characterized in that: The PMMA microspheres are nanocellulose crystals with a width of 5 to 75 nm and a length of 50 to 500 nm and polymethyl methacrylate with an average particle size of less than 25 nm, preferably micro-nano material PMMA microspheres GPI-04.

7. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 6, characterized in that: The matting powder is a silica matting powder, preferably Grace SY-7000; and / or, the content of the CAB liquid is 15-25%, preferably CAB-381-2.

8. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 7, characterized in that: The functional additive is Tisbalon 4200-10 rheological additive; and / or, the titanium dioxide content in the oily polyurethane white slurry is 50% to 70%, and the grinding fineness is ≤15 μm.

9. The oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 8, characterized in that: The hand wax powder is 1400SF; and / or the solvent is an oily organic solvent, preferably selected from one or more of butyl acetate, cyclohexanone, and methyl isobutyl ketone.

10. The method for preparing the oily polyurethane special matte skin-feel white topcoat according to any one of claims 1 to 9, characterized in that: The method comprises mixing an oily polyurethane film former, a defoamer, a wetting agent, a leveling agent, micro-nano material PMMA microspheres, a matting powder, a CAB liquid, an oily polyurethane white slurry, a functional additive, a hand wax powder and a solvent to obtain an oily polyurethane extra matte skin-feel white topcoat.

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