A method for producing a metallic paint on a wood material surface

Abstract

The application discloses a production method of wood material surface metallic paint and belongs to the technical field of wood paint. The production method of the wood material surface metallic paint is characterized in that the scale-shaped metallic powder pigment is arranged in a multi-layer ordered superposition mode, a barrier layer is provided for corrosive medium, shrinkage residual stress is improved to avoid corrosion, the strength of the paint film is improved, the hardness of the paint film is high after solidification, the paint film is resistant to scratching, the vinyl ester resin and the polyurethane powder are mixed to improve the toughness of the paint film, the metallic powder is uniformly dispersed through the polyurethane powder, the defects caused by uneven dispersion such as color difference and local corrosion are reduced, the wood material can be applied to various wood materials such as solid wood, shaving board and fiber board, and the wood material can exhibit a luxurious and gorgeous visual effect, in addition, the wood material has excellent physical and mechanical properties, chemical resistance and weather resistance and the like, and is suitable for the surface treatment of various wood, shaving board and fiber board and can enhance the gloss, brightness and depth of the wood.

Description

Technical Field

[0001] The invention belongs to the technical field of wood coatings, and in particular relates to a method for producing metallic paint on the surface of a wood material. Background Art

[0002] Metallic paint can imitate the color of precious metals on the surface of wooden materials, and is also called gilding. Existing traditional metallic paints have poor corrosion resistance and are prone to defects such as color difference, pinholes, and bubbles. CN201810180711.X discloses a water-based wood paint. Most existing metal paints for wood have complex ingredients, are difficult to produce and prepare, and have poor corrosion resistance. For example, water-based acrylic metallic paint has obvious shortcomings. The introduction of hydrophilic groups during the synthesis of water-based acrylic resins will cause the paint film to easily flash rust when drying and have poor initial water resistance. At the same time, the paint film has low gloss, poor heat resistance, hot stickiness, and cold brittleness, and poor decorative properties. In addition, the arrangement of metal powder in the metallic paint is difficult to control, the brightness adjustment is difficult, the corrosion resistance is poor, and the metal powder pigment has poor dispersion performance. Those skilled in the art are in urgent need of developing a production method for metallic paint on the surface of wooden materials to meet market needs. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for producing metallic paint on the surface of wooden materials to solve the above technical problems.

[0004] A method for producing metallic paint on the surface of wood materials, comprising the following steps: (1) metal powder bonding: polyurethane powder is added to a mixing tank of a microwave bonding machine, nitrogen is introduced, the stirring speed is 650-850 r / min, the microwave power is 500-800 W, the bonding temperature is 66-69°C, when the temperature rises to the bonding temperature, metal powder accounting for 50%-60% of the mass of the polyurethane powder is added, the bonding speed is 550-600 r / min, the bonding time is 40-60s, and finally the material is discharged, cooled, and sieved through 300 mesh to obtain the bonded metal powder; (2) preparation of metallic paint on the surface of wood materials: weighing vinyl Ester resin, bonded metal powder, solvent, defoamer, and accelerator are mixed evenly as component A, wherein by weight, the vinyl ester resin is 80-95 parts, the bonded metal powder is 20-35 parts, the defoamer is 0.1-0.2 parts, the accelerator is 1-3 parts, and the solvent is 95-105 parts; polyurethane curing agent and peroxide catalyst are weighed and mixed evenly as component B, wherein by weight, the polyurethane curing agent is 10-12 parts, and the peroxide catalyst is 3-5 parts; (3) batch mixing: the component A and component B of step (2) are mixed evenly according to the mass ratio of component A:component B of 3-3.5:1.

[0005] Furthermore, the wood material includes one of solid wood, particle board, and fiberboard.

[0006] Furthermore, the metal powder in step (1) is one of flaky copper powder and flaky aluminum powder.

[0007] Copper powder has a golden yellow appearance, a thick texture, a high metallic luster, and strong decorative properties. It has a good effect when applied to wicker weaving, rattan weaving, and wood carvings.

[0008] Aluminum powder has a silvery luster on the surface, good hiding power, strong stability, and good reflectivity to light and heat.

[0009] Furthermore, the vinyl ester resin in step (2) is one of MFE-2, MFE-722 and FX-430-200P.

[0010] Furthermore, in step (1), the polyurethane powder D50 particle size is 30-50 μm. The polyurethane powder brand is selected from BY4606-P, HC4004, or JCBT.

[0011] Furthermore, the solvent in step (2) is one of acetone, toluene or xylene.

[0012] Furthermore, the polyurethane curing agent in step (2) is B-1530 or RC530.

[0013] Furthermore, the accelerator in step (2) is one of cerium isooctanoate or zinc isooctanoate.

[0014] Furthermore, the peroxide catalyst in step (2) is one of cyclohexanone peroxide, cumene hydroperoxide or methyl ethyl ketone peroxide.

[0015] The present invention has the following beneficial effects:

[0016] The present invention discloses a method for producing a metallic paint for wood surfaces. This solvent-based paint overcomes the drawback of traditional monotonous colors by reflecting light from the metal powder, creating a shimmering effect at different angles. The metal powders disclosed in the present invention are flaky copper powder and flaky aluminum powder. The metal powder pigments are arranged in a multi-layered, orderly stacked pattern, providing a barrier to corrosive media such as gasoline. This reduces shrinkage residual stress during drying of the paint film, prevents corrosion, and enhances the film's strength, resulting in high hardness and scratch resistance after curing. A vinyl ester resin and polyurethane powder are mixed to improve the film's toughness. The polyurethane powder is bonded to the metal powder, resulting in uniform dispersion, reducing defects such as color difference and localized corrosion caused by uneven dispersion. This reduces the amount of metal powder used and reduces costs. The resulting metallic paint can be applied to a variety of wood materials, including solid wood, particleboard, and fiberboard. Once the paint film is formed, light bounces off at different depths, creating a shimmering effect and a pearlescent texture. This effect creates a luxurious and opulent visual effect from different viewing angles, and the paint exhibits excellent corrosion and oil resistance. In addition, the coating also has excellent physical and mechanical properties, chemical resistance and weather resistance. It is suitable for the surface treatment of various woods, particleboards and fiberboards, and can enhance their gloss, brightness and depth of three-dimensional sense. DETAILED DESCRIPTION

[0017] The present invention is described below with specific examples, but is not intended to be limiting of the present invention. Example 1

[0018] Funan County Xinxin Wood Processing Factory Boxwood solid wood board, air-dry density 0.87g / cm 3 10% moisture content. Clean the solid wood board and wood substrate of dust, dirt, oil stains, and other contaminants. Sand any burrs, cracks, or other surface defects on the solid wood substrate with sandpaper, and trim the edges and corners. Huachang MFE-2 vinyl ester resin. Yinzhou Patler BY4606-P polyurethane powder with a D50 particle size of 30μm. B-1530 polyurethane curing agent. Huayi SC-8 cerium isooctanoate accelerator. Tianchang Tianguang cyclohexanone peroxide peroxide peroxide catalyst. BD-mw 2450MHz microwave bonding machine. Diamond metal powder produces 800-mesh flaky red copper powder pigment.

[0019] The production method of metal paint on the surface of wood materials includes the following steps: (1) metal powder bonding: polyurethane powder is added to the mixing tank of a microwave bonding machine, nitrogen is introduced, the stirring speed is 850r / min, the microwave power is 800W, the bonding temperature is 69°C, when the temperature rises to the bonding temperature, metal powder accounting for 60% of the mass of the polyurethane powder is added, the bonding speed is 600r / min, the bonding time is 60s, and finally the material is discharged and cooled, and sieved through 300 mesh to obtain the bonded copper powder; (2) preparation of metal paint on the surface of wood materials: weighing vinyl ester resin, bonded metal powder, solvent, The defoamer and the accelerator are mixed evenly as component A, wherein the weight ratio of the vinyl ester resin is 95 parts, the metal powder after bonding is 35 parts, the BNK-NSF066 defoamer is 0.2 parts, the cerium isooctanoate accelerator is 3 parts, and the toluene solvent is 105 parts; the polyurethane curing agent B-1530 and the peroxide catalyst cyclohexanone peroxide are weighed and mixed evenly as component B, wherein the polyurethane curing agent is 12 parts and the peroxide catalyst is 5 parts; (3) batch mixing: the component A and the component B of step (2) are mixed evenly according to the mass ratio of the component A:component B of 3:1.

[0020] Comparative Example 1

[0021] The gold lacquer was prepared according to the method for preparing wood gold lacquer described in "Paint Practical Technology," edited by Gao Shengzhi, page 79, Rural Reading Publishing House, and with reference to the formulation in "Architectural Decoration Materials," edited by Guo Qian, page 109, Shanghai Jiaotong University Press, January 2013, using a ratio of copper powder: 95# gasoline: varnish of 1:4:3. The copper powder was the same as in Example 1, and the varnish was Kailin's KL anti-rust nitrocellulose varnish. Example 2

[0022] Yeji Heima Wood Industry particleboard. Clean the particleboard of dust, dirt, oil stains, and other contaminants. Sand the surface of the particleboard for burrs, cracks, and other defects with sandpaper, and trim the edges and corners. Vinyl ester resin MFE-722. Polyurethane powder is Dandong Tianlong Chemical HC4004 with a D50 particle size of 50μm. Polyurethane curing agent is Ruichuang Chemical RC530. Accelerator is Huayi 825-18 zinc ethylhexanoate. Peroxide catalyst is Shengying Chemical cumene hydroperoxide. BD-mw 2450MHz microwave bonding machine. Yuegong Technology Co., Ltd. produces 600# flaky red copper powder pigment.

[0023] The production method of metal paint on the surface of wood materials includes the following steps: (1) metal powder bonding: polyurethane powder is added to the mixing tank of a microwave bonding machine, nitrogen is introduced, the stirring speed is 650r / min, the microwave power is 500W, the bonding temperature is 66°C, when the temperature rises to the bonding temperature, metal powder accounting for 50% of the mass of the polyurethane powder is added, the bonding speed is 550r / min, the bonding time is 40s, and finally the material is discharged and cooled, and sieved through 300 mesh to obtain the bonded copper powder; (2) preparation of metal paint on the surface of wood materials: weigh vinyl ester resin MFE-722, the bonded metal powder, the ... The metal powder, solvent, defoamer and accelerator are mixed evenly as component A, wherein the weight ratio of MFE-722 vinyl ester resin is 80 parts, the metal powder after bonding is 20 parts, Defom5200 defoamer is 0.1 parts, zinc octanoate accelerator is 1 part and acetone solvent is 95 parts; the polyurethane curing agent and peroxide catalyst are weighed and mixed evenly as component B, wherein the weight ratio of polyurethane curing agent is 10 parts and peroxide catalyst is 3 parts; (3) batch mixing: the component A and component B of step (2) are mixed evenly according to the mass ratio of component A:component B of 3.5:1. Example 3

[0024] Funan Dake density 0.92g / cm 3 NCRE0 fiberboard. Clean dust, dirt, oil, and other contaminants from the fiberboard. Sand any burrs, cracks, or other defects on the fiberboard surface with sandpaper, and trim the edges and corners. Vinyl ester resin FX-430-200P. Polyurethane powder D50 with a particle size of 40μm, Shenzhou Dezhou JCBT polyurethane plastic powder. Polyurethane curing agent RC530, Ruichuang Chemical. Accelerator Huayi SC-8, cerium isooctanoate. Peroxide catalyst, methyl ethyl ketone peroxide, produced by Longquan Longhua Company. BD-mw 2450MHz microwave bonding machine. Zhangqiu 1200-mesh ZLG-8120 aluminum powder.

[0025] The production method of metal paint on the surface of wood materials includes the following steps: (1) metal powder bonding: polyurethane powder is added to the mixing tank of a microwave bonding machine, nitrogen is introduced, the stirring speed is 700r / min, the microwave power is 600W, the bonding temperature is 68°C, when the temperature rises to the bonding temperature, metal powder accounting for 55% of the mass of the polyurethane powder is added, the bonding speed is 550r / min, the bonding time is 50s, and finally the material is discharged and cooled, and sieved through 300 mesh to obtain the bonded copper powder; (2) preparation of metal paint on the surface of wood materials: vinyl ester resin, metal powder after bonding are weighed, and the metal powder after bonding is weighed. The metal powder, solvent, defoamer and accelerator are mixed evenly as component A, wherein the weight ratio of vinyl ester resin is 88 parts, the bonded metal powder is 30 parts, Defom5200 defoamer is 0.15 parts, cerium isooctanoate accelerator is 2 parts and xylene solvent is 100 parts; the polyurethane curing agent and peroxide catalyst are weighed and mixed evenly as component B, wherein the weight ratio of polyurethane curing agent is 11 parts and peroxide catalyst is 4 parts; (3) batch mixing: the component A and component B of step (2) are mixed evenly according to the mass ratio of component A:component B of 3:1.

[0026]

[0027] Note: The general conditions of the test were in accordance with GB / T3186. The state of the sample was adjusted and the temperature and humidity of the test were in accordance with GB / T9278. The paint film was prepared in accordance with LY / T1740-2008 6.2. The fineness was determined in accordance with GB / T6753.1. The solid content was determined in accordance with GB / T1725. The dry time was determined in accordance with GB / T1728-1979 (1989) by the finger touch method. The dry time was determined in accordance with GB / T1728-1979 (1989) by the filter paper method. The film appearance was determined in accordance with GB / T1727. The sample and the standard sample were prepared on a 50㎜×120㎜×0.3㎜ tin plate. After the film was dry, the two plates were overlapped by 1 / 4 area and examined under natural scattered light. The distance between the eye and the sample was 30㎝ and the angle was 120°. The grid test was determined in accordance with GB / T9286 with a cutting interval of 2mm. The adhesive tape was not used. The hardness was determined in accordance with GB / T6739. The hiding power was determined in accordance with GB / T1726-1979. The gloss was determined in accordance with GB / T9754. The gel time was determined in accordance with GB / T7193. The dry heat resistance was determined in accordance with GB / T4893.3 at a test temperature of 90℃ for 15min. The effective oxygen content was determined in accordance with Appendix B. The harmful substance limit was determined in accordance with GB18581-2009 5.2.5. The test rules were in accordance with LY / T1740-2008 Chapter 7. The acid resistance was determined in accordance with GB / T9274-1988 Method A. The sample was immersed in 0.05mol / L H2SO4 solution for 24h and observed under scattered light. If three of the three test plates did not show blistering, wrinkling, peeling, significant discoloration, and significant loss of gloss, etc., the film was evaluated as “no abnormality”. The alkali resistance was determined in accordance with GB / T9274-1988 Method A. The sample was immersed in 0.1mol / L NaOH solution for 24h and observed under scattered light. If three of the three test plates did not show blistering, wrinkling, peeling, significant discoloration, and significant loss of gloss, etc., the film was evaluated as “no abnormality”. The gasoline resistance was determined in accordance with GB / T9274-1988 Method A. The sample was immersed in 92# gasoline in accordance with GB17930 for 24h and observed under scattered light. If three of the three test plates did not show blistering, wrinkling, peeling, significant discoloration, and significant loss of gloss, etc., the film was evaluated as “no abnormality”. The corrosion resistance (salt spray test) was determined in accordance with GB / T1771-2007. A straight line parallel to the long side was drawn in the middle of the test plate. Whether the film showed blistering, rusting, cracking, and peeling, etc.

Claims

1. A method for producing metallic paint on the surface of wood materials, characterized in that: The following steps are involved: (1) Metal powder bonding: polyurethane powder is added to the mixing tank of the microwave bonding machine, nitrogen is introduced, the stirring speed is 650-850 r / min, the microwave power is 500-800 W, the bonding temperature is 66-69 ° C, when the temperature rises to the bonding temperature, metal powder accounting for 50%-60% of the mass of the polyurethane powder is added, the bonding speed is 550-600 r / min, the bonding time is 40-60 s, and the material is finally discharged and cooled, sieved with 300 mesh, and the bonded metal powder is obtained; (2) Preparation of metal paint on the surface of wood materials: weigh vinyl ester resin, bonded metal powder, The solvent, defoamer and accelerator are mixed evenly as component A, wherein the weight ratio of vinyl ester resin is 80-95 parts, the metal powder after bonding is 20-35 parts, the defoamer is 0.1-0.2 parts, the accelerator is 1-3 parts and the solvent is 95-105 parts; the polyurethane curing agent and peroxide catalyst are weighed and mixed evenly as component B, wherein the weight ratio of polyurethane curing agent is 10-12 parts and the peroxide catalyst is 3-5 parts; (3) batch mixing: the component A and component B of step (2) are mixed evenly according to the mass ratio of component A:component B of 3-3.5:

1.

2. The method for producing a metallic paint on a wood surface according to claim 1, characterized in that: The wood material includes one of solid wood, particle board and fiber board.

3. The method for producing a metallic paint on a wood surface according to claim 1, characterized in that: The metal powder in step (1) is one of flaky copper powder and flaky aluminum powder.

4. The method for producing a metallic paint on a wood surface according to claim 1, characterized in that: The vinyl ester resin in step (2) is one of MFE-2, MFE-722 and FX-430-200P.

5. The method for producing a metallic paint on a wood material surface according to claim 1, characterized in that: The polyurethane powder D50 particle size in step (1) is 30 to 50 μm.

6. The method for producing a metallic paint on a wood surface according to claim 1, characterized in that: The solvent in step (2) is one of acetone, toluene or xylene.

7. The method for producing metallic paint on the surface of wood materials according to claim 1, characterized in that: The polyurethane curing agent in step (2) is B-1530 or RC530.

8. The method for producing metallic paint on the surface of wood materials according to claim 1, characterized in that: The accelerator in step (2) is one of cerium isooctanoate and zinc isooctanoate.

9. The method for producing metallic paint on the surface of wood materials according to claim 1, characterized in that: The peroxide catalyst in step (2) is one of cyclohexanone peroxide, cumene hydroperoxide or methyl ethyl ketone peroxide.

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