CN116120788A - A kind of anti-whitening one-component filler and its preparation method and application - Google Patents

Abstract

The invention belongs to the technical field of paint, and particularly relates to a whitening-preventing single-component filler and a preparation method thereof. The composite material comprises the following components in parts by weight: 5-10 parts of hydroxy acrylic resin, 5-8 parts of castor oil resin, 25-35 parts of starch, 5-10 parts of transparent powder, 5-10 parts of glass powder and 30-40 parts of ether ester solvent. The filler solves the problems of easy blushing and mildew of furniture in the later stage of finishing coating, and has excellent adhesive force, chemical resistance and the like.

Description

A kind of anti-whitening one-component filler and its preparation method and application

technical field

The invention belongs to the technical field of coatings, and in particular relates to a whitening-preventing one-component filler and a preparation method thereof.

Background technique

In recent years, furniture with pure solid wood feeling has been favored by many manufacturers and consumers, and occupies an indispensable position in home furnishing production. It is very common for furniture manufacturers to use wood lacquer to process and paint solid wood veneer. However, the effect of ordinary wood lacquer coating on log processing is relatively simple, without exquisite and gorgeous texture. Moisture and water absorption often lead to whitening and mildew of the paint film in the later stage, which not only affects the appearance of the product, but even leads to unqualified products, seriously affecting the use. Moreover, the wood lacquer is often not ideal in terms of wettability with wood. After the coating is finished, it is not smooth enough, and it is easy to crack, which brings economic losses to furniture manufacturers and consumers.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-whitening one-component filler, which has excellent adhesion and chemical resistance while not containing a curing agent, and solves the problem of solid wood furniture after being painted. In the later stage, it is easy to turn white and mildew. On the other hand, the present invention also provides a preparation method of the above-mentioned anti-blushing one-component filler.

The present invention will solve the above problems through the following technical solutions:

An anti-whitening one-component filler, comprising the following components calculated in parts by weight: 5-10 parts of hydroxyl acrylic resin, 5-8 parts of castor oil resin, 25-35 parts of starch, and 5-10 parts of transparent powder parts, glass powder 5-10 parts, ether ester solvent 30-40 parts.

Further, the fineness of the hydroxyacrylic resin is 3-10 microns, the viscosity is 2500-3500CPS, and the hydroxyl value content is 50±10mgKOH/g; Lanka WXU-880 and Tongde AC6552 are preferred;

Further, the castor oil resin has a fineness of 3-10 microns and a viscosity of 1500-2500 CPS; preferably Taiwan Rongli A218-95 and Changxing M-100.

Further, the starch is at least one of corn starch and tapioca starch.

Further, the transparent powder is a kind of 2500 mesh anhydrous transparent powder; preferably Housheng TM-2500.

Further, the glass powder is a kind of 2000 mesh anhydrous glass powder; preferably Housheng BL-2000.

Further, the ether ester solvent includes propylene glycol methyl ether acetate (PMA).

The anti-whitening one-component filler of the present invention can be sprayed on the solid wood veneer substrate, and after the spraying is completed, a two-component curing primer can also be further sprayed.

The preparation method of the above-mentioned anti-whitening one-component filler comprises the following steps:

S1. Disperse the hydroxyacrylic resin, castor oil resin and 25-30 parts by weight of ether ester solvent at a speed of 400-500 rpm for 3-5 minutes until uniform;

S2. Put in starch, transparent powder, and glass powder, and disperse for 10-15 minutes at a speed of 1000-1500 rpm;

S3. Then add the remaining ether ester solvent, disperse at a speed of 800-1000 rpm for 5-10 minutes until uniform, and then filter.

The beneficial effects of the present invention are:

1. The present invention selects pure acrylic resin with low hydroxyl value as the film-forming material, which can participate in the reaction with the curing agent in the two-component primer after spraying the two-component primer, greatly improving its adhesion, and the combination with the base material is better It is excellent and firm, and the curing and drying speed of this resin is fast. At the same time, it has the high hardness, high yellowing resistance and high adhesion of traditional acrylic resins, so that the coating film has good weather resistance and chemical resistance.

2. The powder selected in the present invention is anhydrous filler, the moisture content is almost zero, and because the particle size of the powder is small, it is easy to be wrapped in the resin, and a part of the wooden conduit is well filled, so that the moisture absorption and water absorption of the veneer are improved. It is greatly reduced, and it is not easy to whiten in the later stage of coating, which is beneficial to reduce the usage of primer and topcoat, save the cost of construction, and improve the efficiency of furniture manufacturers.

3. The present invention also chooses castor oil resin to match with it. This resin is a non-drying resin, which can well infiltrate wooden conduits, has excellent color retention, good color accuracy, and is more convenient to wipe during construction , After the overall construction is completed, it can fully reflect the permeability and vividness of wooden furniture.

4. The present invention is reasonably matched with ether ester solvents to increase the construction and drying time to 2-3 hours, so that the filler can fully react with the curing agent in the primer.

Detailed ways

The present invention will be further described below in combination with specific embodiments, but the present invention is not limited thereto. The methods involved in the present invention are methods commonly used in the art unless otherwise specified, and the reagents involved can be obtained from common commercial channels unless otherwise specified.

The composition formula of anti-whitening one-component filler embodiment 1～5 of the present invention is as shown in table 1:

Table 1: The filler composition formula of Examples 1-5

The preparation steps of above-mentioned embodiment 1～5 are as follows:

S1. Put in hydroxyacrylic resin, castor oil resin and 25-30 parts by weight of ether ester solvent in turn, and disperse for about 3-5 minutes until uniform at a speed of 400-500 rpm;

S2. Add cornstarch, transparent powder, and glass powder in turn, and disperse for 10-15 minutes at a speed of 1000-1500 rpm;

S3. Then add the remaining ether ester solvent, disperse at a speed of 800-1000 rpm for 5-10 minutes until uniform, and then filter with a 200-mesh filter cloth filter bag.

After adjusting the above-mentioned Examples 1-5 and the tetramethylbenzene diluent according to the ratio of 100:40-50 to a construction viscosity of 15-18 seconds (measured by a viscosity cup), spray and wipe the test on a solid wood board by a method commonly used in the field , according to GB-18581-2009 and GB/T23997-2009 test standards, the performance test results are shown in Table 2:

Table 2:

The present invention can further coat two-component transparent primer, and transparent primer can be two-component curing primer commonly used in this area, and the preparation raw material of wherein a kind of two-component curing primer is provided below, respectively as table 3 and Shown in table 4, table 5 is the composition raw material of diluent:

table 3:

serial number components product name parts by weight 1 soybean oil fatty acid resin First Decision XC-8506 70 2 Dispersant EFKA-4010 0.5 3 Bentonite SD-1 0.5 4 Zinc stearate powder Hanwei TV-P 3 5 leveling agent EFKA-3777 0.2 6 Ether ester solvent PMA 10 7 lipid solvent BAC 16

Table 4:

serial number components parts by weight 1 Trimeric TDI 45 2 HDI 18 3 Dehydrating agent 0.5 4 BAC 36.5

table 5:

serial number components parts by weight 1 Xylene 20 2 Butyl BAC 60 3 Propylene glycol methyl ether acetate PMA 20

Test the performance of Examples 1 to 5 after further coating the transparent primer, adjust the components shown in Table 3, Table 4, and Table 5 according to the ratio of 100:45-55:30-40 to a construction viscosity of 12- 14 seconds (viscosity cup measurement) obtains transparent primer, then the solid wood plank after coating embodiment 1～5 is further coated with the transparent primer obtained, and coating mode is the method commonly used in this area, according to GB-18581 -2009 and GB/T23997-2009 test standards, the performance test results after primer coating are shown in Table 6:

Table 6:

The results of the above Table 2 and Table 6 show that the anti-whitening one-component filler of the present invention complies with the GB-18581-2020 standard and the GB/T23997-2009 standard, and solves the problem of whitening of solid wood furniture in the later period after coating , mildew problem, and has superior adhesion, chemical resistance and other properties.

It can be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention, so any equivalent changes or modifications based on the features and principles described in the claims of the present invention, All should be included within the scope of the claims of the present invention.

Claims (10)

1. An anti-whitening single-component filler, characterized in that, comprises the following components calculated in parts by weight: 5-10 parts of hydroxyacrylic resin, 5-8 parts of castor oil resin, 25-35 parts of starch , 5-10 parts of transparent powder, 5-10 parts of glass powder, 30-40 parts of ether ester solvent. 2. The anti-whitening one-component filler according to claim 1, characterized in that, the fineness of the hydroxyacrylic resin is 3-10 microns, the viscosity is 2500-3500CPS, and the hydroxyl value content is 50± 10mgKOH/g. 3. The anti-whitening one-component filler according to claim 1, characterized in that, the fineness of the castor oil resin is 3-10 microns, and the viscosity is 1500-2500CPS. 4. The anti-whitening one-component filler according to claim 1, wherein the starch is at least one of corn starch and tapioca starch. 5. The anti-whitening one-component filler according to claim 1, characterized in that, the transparent powder is TM-2500. 6. The anti-whitening one-component filler according to claim 1, characterized in that, the glass powder is BL-2000. 7. The anti-whitening one-component filler according to claim 1, characterized in that, the ether ester solvent comprises propylene glycol methyl ether acetate. 8. A preparation method of the anti-whitening one-component filler according to any one of claims 1-7, characterized in that, comprising the following steps: Disperse hydroxyacrylic resin, castor oil resin and 25-30 parts by weight of ether ester solvent at a speed of 400-500 rpm for 3-5 minutes until uniform; S2. Put in starch, transparent powder, and glass powder, and disperse for 10-15 minutes at a speed of 1000-1500 rpm; S3. Then add the remaining ether ester solvent, disperse at a speed of 800-1000 rpm for 5-10 minutes until uniform, and then filter. 9. The application of the anti-whitening one-component filler according to any one of claims 1-7, characterized in that, it is sprayed on the solid wood veneer substrate. 10. The application of the anti-blushing one-component filler according to claim 9, characterized in that, after spraying on the solid wood veneer substrate, further spraying a two-component curing primer.