A water-based filler for a furniture closed coating process and a method for preparing the same

Abstract

The present application relates to the technical field of paint, especially to the field of IPC C09D101, further, to a water-based filling agent for furniture closed coating process and a preparation method thereof, which comprises the following raw materials in percentage by mass: fillers 40-55%, humectants 3-7%, fumed silica 3-7%, dispersants 1-3%, thickening agents 0.5-2%, defoaming agents 1-3%, and a base in the rest; the base at least comprises water. The filling agent prepared by the present application can avoid hardening and sedimentation at 50 DEG C, and improve the operability and anti-swelling performance of the filling agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to the field of IPC C09D101, and further relates to a water-based filler for furniture closed coating process and a preparation method thereof. BACKGROUND

[0002] In the furniture production industry, fillers can not only reduce the number of primer spraying, but also achieve the effects of filling and coloring, so they have a wide application prospect.

[0003] Traditional fillers are solvent-based fillers. Since they contain volatile organic compounds, they not only have the disadvantage of strong odor, but also have certain effects on the environment and human health. Water-based fillers have the advantages of not containing harmful volatile substances, low odor, good coating effect, can fill the fine pores and unevenness on the surface of furniture, rich color, adjustable texture and texture, low viscosity and good flowability, easy construction and wiping, short drying time and high construction efficiency.

[0004] However, water-based fillers are easily affected by factors such as wood humidity and surface treatment, resulting in poor adhesion, peeling and peeling problems. Water in the coating film can easily penetrate into the wood from the wood surface, destroy the original moisture balance of the wood and cause swelling phenomenon. Water-based fillers have low viscosity and good flowability, which can cause problems such as poor anti-settling performance.

[0005] Chinese patent CN 201810361286 discloses a water-based wood paint filler and a preparation method thereof, which comprises the following raw material components and weight parts: polyurethane emulsion 33-53 parts; water 4-12 parts; cellulose 0.2-1 part; pigment and filler dispersant 0.2-1 part; defoaming agent 0.1-1 part; pH auxiliary agent 0.1-0.5 part; 800 mesh heavy calcium 5-25 parts; talc 12-40 parts; film forming aid 2.5-10 parts; polishing aid 2-8 parts; bactericide 0.1-0.5 parts; thickening agent 0.1-3 parts. However, the technical solution is based on polyurethane emulsion as the main filling base, and the anti-settling performance of the filler needs to be improved. SUMMARY

[0006] The present application provides a water-based filler for furniture closed coating process, which comprises the following raw materials in mass percentage: filler 40-55%, humectant 3-7%, fumed silica 3-7%, dispersant 1-3%, thickening agent 0.5-2%, defoaming agent 1-3%, and base in the rest.

[0007] Preferably, the base is a mixture of cellulose ether and water.

[0008] Preferably, the mass ratio of cellulose ether to water is 1:(2-4).

[0009] Preferably, the mass ratio of the cellulose ether and water is 1:3.

[0010] Preferably, the cellulose ether is selected from one or more combinations of hydroxypropyl methyl cellulose ether, hydroxyethyl methyl cellulose ether, ethyl cellulose ether, and hydroxyethyl cellulose ether.

[0011] Preferably, the cellulose ether is hydroxyethyl cellulose ether.

[0012] In the prior art, the water-based filling agent usually uses a water-based resin as a base material and adds a filler as a filling agent to achieve the filling and sealing of furniture and has good adhesion and high hardness; however, due to the incompatibility of the water-based resin and the filler, the filler is prone to sedimentation, especially at high temperatures, which affects the storage stability. To solve the above problems, the applicant found that when the cellulose ether and water mixture is used as a base material, the filling agent in the present application can avoid hardening and sedimentation at 50°C. Especially when the mass ratio of cellulose ether and water is 1:3, and the cellulose ether is hydroxyethyl cellulose ether, the filling agent can avoid hardening and sedimentation at 50°C, and also improve the operability and anti-swelling performance of the filling agent.

[0013] Preferably, the filler is selected from one or more combinations of sand powder, acrylic powder, talc powder, and transparent powder.

[0014] Preferably, the filler is a combination of sand powder and acrylic powder.

[0015] Preferably, the mass ratio of the sand powder and the acrylic powder is (30-50):(10-20).

[0016] Preferably, the mass ratio of the sand powder and the acrylic powder is 40:10.

[0017] Preferably, the particle size of the sand powder is 20-50 μm.

[0018] Preferably, the sand powder includes sand powder with a particle size of 25-35 μm and sand powder with a particle size of 40-50 μm.

[0019] Preferably, the sand powder includes sand powder with a particle size of 30 μm and sand powder with a particle size of 45 μm.

[0020] Preferably, the mass ratio of the sand powder with a particle size of 30 μm and the sand powder with a particle size of 45 μm is (20-30):(10-20).

[0021] Preferably, the mass ratio of the sand powder with a particle size of 30 μm and the sand powder with a particle size of 45 μm is 25:15.

[0022] Preferably, the particle size of the acrylic powder is 50-80 μm.

[0023] Preferably, the particle size of the acrylic powder is 50-70 μm.

[0024] Preferably, the particle size of the acrylic powder is 60 μm.

[0025] In the system of the present application, even if the mixture of cellulose ether and water is used as the base material, the compatibility of the filler in the system can be improved to a certain extent, but the selection of the filler still affects the stability of the filler, and the filler not only affects the stability of the filler, but also is crucial to the filling effect of the filler. The present applicant found that when the filler in the system of the present application is sand powder and acrylic powder, and the mass ratio of sand powder to acrylic powder is (30-50):(10-20), the filling effect is good, but it is still inevitable to cause sedimentation; in addition, generally speaking, the smaller the particle size of the filler, especially below 10 μm, the better the dispersibility, the less likely to settle and the better the filling effect on small pores and recessed parts; but the present applicant found in the experiment that when the filler in the system of the present application is sand powder and acrylic powder, the sand powder includes sand powder with a particle size of 30 μm and sand powder with a particle size of 45 μm, and the particle size of the acrylic powder is 60 μm, not only can the filler avoid sedimentation at 50°C, but also can achieve better filling effect on pores and recessed parts of different sizes, and also has excellent anti-collapse performance. The present applicant guesses that: on the one hand, the sand powder and acrylic powder with the particle size can be well dispersed in the system of the present application, and at the same time can form a viscosity in which the filler can stably exist, avoiding the filler losing the normal suspended state due to the low viscosity of the filler; on the other hand, due to the existence of sand powder with different particle sizes, the sand powder with different particle sizes can be filled in the gap between the acrylic powder and the acrylic powder, the acrylic powder and the sand powder, thereby improving the filling density, and when filling pores and recessed parts of different sizes, the effect is better, and the high filling density also makes the anti-collapse performance of the filler good; in addition, compared with inorganic filler powder, sand powder and acrylic powder also improve the adhesion of the filler to a certain extent.

[0026] Preferably, the humectant is selected from one or more combinations of propylene glycol, glycerol, and polyethylene glycol.

[0027] Preferably, the dispersant is selected from a block type high molecular dispersant or a comb type high molecular dispersant.

[0028] Preferably, the dispersant is a block type high molecular dispersant.

[0029] Preferably, the thickening agent is selected from a non-ionic associated polyurethane thickening agent or a polyacrylic thickening agent.

[0030] Preferably, the thickening agent is a non-ionic associated polyurethane thickening agent.

[0031] Preferably, the non-ionic associated polyurethane thickening agent is a polyether polyurethane associated thickening agent.

[0032] Preferably, the defoaming agent is a silicone defoaming agent.

[0033] Preferably, the silicone defoaming agent is a polyether siloxane containing hydrophobic particles.

[0034] The second aspect of the present application provides a water-based filler for a furniture closed coating process, comprising the following steps:

[0035] S1, weighing each raw material by mass percentage;

[0036] S2, uniformly mixing the cellulose ether and water to prepare a pre-melted slurry;

[0037] S3, uniformly mixing the pre-melted slurry, the filler, the humectant, the fumed silica, the dispersing agent, the thickening agent, and the defoaming agent to obtain the filler.

[0038] Advantages:

[0039] 1. When the mixture of cellulose ether and water is used as the base material in the present application, the filler in the present application can avoid hardening and sedimentation at 50℃.

[0040] 2. When the mass ratio of cellulose ether and water is 1:3 and the cellulose ether is hydroxyethyl cellulose ether, the filler not only avoids hardening and sedimentation at 50℃, but also improves the operability and anti-swelling performance of the filler.

[0041] 3. When the mass ratio of the filler in the system of the present application is (30-50):(10-20), the filler has good filling effect.

[0042] 4. When the filler in the system of the present application is sand powder and acrylic powder, the sand powder includes sand powder with a particle size of 30μm and sand powder with a particle size of 45μm, and the particle size of the acrylic powder is 60μm, the filler not only avoids sedimentation at 50℃, but also achieves better filling effect on different size pores and recessed parts, and has excellent anti-collapse performance.

[0043] 5. The block type high molecular dispersing agent and the non-ionic associated polyurethane thickening agent used in the present application can jointly act with the base material of the present application, further improving the storage stability of the filler, so that there is no sedimentation phenomenon at 50℃ for 7 days. DETAILED DESCRIPTION

[0044] Example 1

[0045] The embodiment 1 provides a water-based filler for furniture closed coating process, which comprises the following raw materials in percentage by mass: filler 50%, humectant 5%, fumed silica 5%, dispersant 2%, thickening agent 1%, defoaming agent 2%, and base in remainder; the base is a mixture of cellulose ether and water.

[0046] The mass ratio of the cellulose ether to water is 1:3.

[0047] The cellulose ether is a hydroxyethyl cellulose ether, which is purchased from Shandong Heda Group Co., Ltd., and the model number is HEC.

[0048] The filler is selected from the combination of sand powder and acrylic powder.

[0049] The mass ratio of the sand powder to the acrylic powder is 40:10.

[0050] The sand powder comprises sand powder with a particle size of 30 μm and sand powder with a particle size of 45 μm, which are purchased from Jiangxi Longhai Chemical Co., Ltd., and the model numbers are 376 and 378, respectively.

[0051] The mass ratio of the sand powder with a particle size of 30 μm to the sand powder with a particle size of 45 μm is 25:15.

[0052] The acrylic powder has a particle size of 60 μm, which is purchased from Shanghai Gaohong New Material Technology Co., Ltd., and the model number is GPI60.

[0053] The humectant is propylene glycol.

[0054] The dispersant is a block type high molecular dispersant, and the model number is BYK 190.

[0055] The thickening agent is a non-ionic associated polyurethane thickening agent, which is a polyether polyurethane associated thickening agent, and the model number is HEMINGSDIECE RHEOLATE 299.

[0056] The defoaming agent is a silicone defoaming agent, which is a polyether siloxane containing hydrophobic particles, and the model number is DEGOWAX901W.

[0057] The fumed silica has a model number of WACKER AEROSIL 200.

[0058] A water-based filler for furniture closed coating process comprises the following steps:

[0059] S1, each raw material is weighed in percentage by mass

[0060] S2, the cellulose ether and water are uniformly mixed to prepare a pre-melted slurry;

[0061] S3, mix the base material, filler, humectant, fumed silica, dispersant, thickening agent, defoaming agent uniformly to obtain.

[0062] Comparative Example 1

[0063] Comparative Example 1 provides a water-based filler for furniture closed coating process, the specific embodiment is the same as Example 1, the difference is that the base material is a water-based polyurethane resin.

[0064] A water-based filler for furniture closed coating process, comprising the following steps:

[0065] S1, weigh each raw material according to the mass percentage;

[0066] S3, mix the base material, filler, humectant, fumed silica, dispersant, thickening agent, defoaming agent uniformly to obtain.

[0067] Comparative Example 2

[0068] Comparative Example 2 provides a water-based filler for furniture closed coating process, the specific embodiment is the same as Example 1, the difference is that the base material is a water-based polyurethane resin; the filler includes talc, heavy calcium carbonate, mica powder; the mass ratio of talc, heavy calcium carbonate, mica powder is 15:15:20.

[0069] The talc is purchased from Changxing Xiguan Building Material Co., Ltd., model: HF-1250 mesh.

[0070] The heavy calcium carbonate is purchased from Shanghai Chuanyu New Material Co., Ltd., model: LC-8150.

[0071] The mica powder is purchased from Guangdong Shenpeng Powder Co., Ltd., model: 1250.

[0072] A water-based filler for furniture closed coating process, comprising the following steps:

[0073] S1, weigh each raw material according to the mass percentage;

[0074] S3, mix the base material, filler, humectant, fumed silica, dispersant, thickening agent, defoaming agent uniformly to obtain.

[0075] Performance test:

[0076] 2% black paste, 3% yellow paste, 1% red paste (based on water-based filler) were added to the water-based fillers prepared in Example 1 and Comparative Examples 1-2 respectively, and stirred uniformly, and the furniture oak board surface was filled and treated by rubbing, the thickness was 1.0-1.2mm, and the following tests were carried out:

[0077] (1) Adhesion stability: The adhesion was tested multiple times (10 times) according to GB / T 4893.4-2013 "Physico-chemical properties of surface coatings for furniture - Part 4: Determination of adhesion - Cross-cut method".

[0078] (2) Anti-swelling performance: The test was completed according to GB / T 4893.7-2013 "Physico-chemical properties of surface coatings for furniture - Part 7: Determination of resistance to cold and hot temperature differences - Method", and whether the paint film around the catheter was swollen and abnormal was observed.

[0079] (3) Storage anti-settling property: The water-based filler main agent was stored in a 50°C oven for 7 days, and whether there was precipitation phenomenon at the bottom of the main agent was observed.

[0080] (4) Construction operability: The construction method of wiping was used to operate on the surface of furniture oak board, and whether it was easy to operate was judged by comparing the wiping and collecting resistance of each case.

[0081] (5) Anti-collapse performance: The test was completed according to GB / T 4893.7-2013 "Physico-chemical properties of surface coatings for furniture - Part 7: Determination of resistance to cold and hot temperature differences - Method", and whether there were recesses and unevenness on the surface of the paint film was observed.

[0082] Table 1

[0083]

Claims

1. A water-based filler for a furniture sealing coating process, characterized in that, The product comprises, by weight percentage, the following raw materials: 40-55% filler, 3-7% humectant, 3-7% fumed silica, 1-3% dispersant, 0.5-2% thickener, 1-3% defoamer, and the remainder being base material; the base material shall include at least water. The filler is sand powder and acrylic powder; The acrylic powder has a particle size of 50~80µm; The sand flour includes sand flour with a particle size of 25~35µm and sand flour with a particle size of 40~50µm; The base material is a mixture of cellulose ether and water.

2. The furniture sealing coating process using a water-based filler according to claim 1, characterized in that, The mass ratio of the cellulose ether to water is 1:(2~4).

3. The furniture sealing coating process using a water-based filler according to claim 1, characterized in that, The cellulose ether is selected from one or more combinations of hydroxypropyl methylcellulose ether, hydroxyethyl methylcellulose ether, ethyl cellulose ether, and hydroxyethyl cellulose ether.

4. The furniture sealing coating process using a water-based filler according to claim 1, characterized in that, The dispersant is selected from block polymeric dispersants or comb-shaped polymeric dispersants.

5. A water-based filler for furniture sealing coating process according to any one of claims 1-4, comprising the following steps: S1. Weigh each raw material according to its mass percentage; S2. Mix cellulose ether and water evenly to prepare a pre-melted slurry; S3. Mix the pre-melted slurry, filler, humectant, fumed silica, dispersant, thickener, and defoamer evenly to obtain the final product.

Images