PU white primer, preparation method and application thereof

Abstract

The application belongs to the field of paint, and particularly discloses PU white primer, a preparation method and application thereof. The PU white primer comprises A component, B component and C component. The A component comprises hydroxyl acrylic acid resin, castor oil, dispersing agent, defoaming agent, cyclohexanone, silicon dioxide, titanium white powder, talcum powder, calcium carbonate, butyl acetate, leveling agent, organic tin and propylene glycol methyl ether acetate. The B component comprises butyl acetate, HDI trimer and isocyanate prepolymer. The C component comprises dimethylbenzene, butyl acetate, propylene glycol methyl ether acetate and dimethyl carbonate. The PU white primer has the advantages of water resistance, high temperature resistance, adhesion, adhesion, hiding power and strong flexibility, and has superior comprehensive performance, is green and safe, low in cost, and is very suitable for being used as wood and stone surface primer in kitchens, bathrooms and the like.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a PU white primer, its preparation method, and its application. Background Technology

[0002] As consumers' demands for quality of life continue to rise, they have higher requirements for the water resistance, high temperature resistance, adhesion, and flexibility of kitchen and bathroom products. As a result, the requirements for primers used in coating wood and stone products have also increased. However, current primers are difficult to produce with comprehensive properties such as water resistance, high temperature resistance, good adhesion, strong hiding power, and strong flexibility, making them suitable for spraying as primers or paint films on kitchen and bathroom products.

[0003] Therefore, it is necessary to improve the existing PU white primer to overcome the above problems, obtain a white primer with superior overall performance, improve coating quality, and increase product added value. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a PU white primer. The PU white primer of this invention has advantages such as water resistance, high temperature resistance, adhesion, strong adhesion, hiding power, and high flexibility, exhibiting superior overall performance and fully meeting the performance requirements of PU white primer products for wood and stone in kitchens and bathrooms.

[0005] The present invention also provides a method for preparing PU white primer.

[0006] The present invention also provides a coating.

[0007] The present invention also provides a furniture product.

[0008] This invention also provides the application of PU white primer.

[0009] In a first aspect, the present invention provides a PU white primer, the raw materials for which are prepared include component A, component B and component C;

[0010] The A component includes hydroxy acrylic resin, castor oil, dispersant, defoamer, cyclohexanone, silica, titanium dioxide, talc, calcium carbonate, butyl acetate, leveling agent, organotin and propylene glycol methyl ether acetate.

[0011] Component B includes butyl acetate, HDI trimer and isocyanate prepolymer;

[0012] The component C includes xylene, butyl acetate, propylene glycol methyl ether acetate, and dimethyl carbonate.

[0013] According to specific embodiments of the present invention, the PU white primer provided by the present invention has at least the following beneficial effects: strong water resistance, high temperature resistance, adhesion, strong adhesion, strong hiding power, and strong flexibility, with excellent comprehensive performance, and has the advantages of safety and low cost, making it very suitable as a primer for wood and stone surfaces in kitchens, bathrooms, etc.

[0014] According to some embodiments of the present invention, by weight, component A independently comprises 28-62 parts of hydroxyl acrylic resin, 1.5-6 parts of castor oil, 0.08-1.2 parts of dispersant, 0.08-1.2 parts of defoamer, 0.8-6 parts of cyclohexanone, 0.08-1.2 parts of silica, 4-15 parts of titanium dioxide, 18-25 parts of talc, 12-18 parts of calcium carbonate, and 1-3 parts of butyl acetate. The components are: 0.1-1.5 parts leveling agent, 0.1-1.5 parts organotin, and 1-3 parts propylene glycol methyl ether acetate; component B independently comprises 25-45 parts butyl acetate, 25-55 parts HDI trimer, and 15-35 parts isocyanate prepolymer; component C independently comprises 8-35 parts xylene, 15-35 parts butyl acetate, 35-50 parts propylene glycol methyl ether acetate, and 8-20 parts dimethyl carbonate.

[0015] According to some embodiments of the present invention, by weight, component A independently comprises 30-60 parts of hydroxyl acrylic resin, 2-5 parts of castor oil, 0.1-1 parts of dispersant, 0.1-1 parts of defoamer, 1-5 parts of cyclohexanone, 0.1-1 parts of silica, 5-13 parts of titanium dioxide, 19.7-23 parts of talc, 15-16 parts of calcium carbonate, 1.5-2.5 parts of butyl acetate, 0.5-1.2 parts of leveling agent, 0.5-1.2 parts of organotin, and 1.5-2.5 parts of propylene glycol methyl ether acetate; component B independently comprises 30-40 parts of butyl acetate, 30-50 parts of HDI trimer, and 20-30 parts of isocyanate prepolymer; component C independently comprises 10-30 parts of xylene, 20-30 parts of butyl acetate, 40-45 parts of propylene glycol methyl ether acetate, and 10-15 parts of dimethyl carbonate.

[0016] According to some embodiments of the present invention, the castor oil is blown castor oil.

[0017] According to some embodiments of the present invention, hydroxyl acrylic resin, as the main component, helps to improve the water resistance, high temperature resistance, and adhesion of the primer product. The present invention also improves flexibility and enhances the hardness and adhesion of the PU white primer after drying by adding a portion of blown castor oil to replace the hydroxyl acrylic resin. Dispersants are used to shorten dispersion time; defoamers are used to reduce the amount of bubbles generated during dispersion; silica is used to improve the primer's anti-settling properties; titanium dioxide is used to improve the primer's hiding power; talc is used to improve the primer's abrasion resistance; calcium carbonate is used to improve the primer's filling properties; leveling agents are used to improve leveling during piano gloss black spraying; organotin compounds are used to improve drying time; and HDI trimer is used to improve flexibility.

[0018] According to some embodiments of the present invention, the weight ratio of component A, component B and component C is 1:(0.3-0.5):(0.45-0.55).

[0019] A second aspect of the present invention provides a method for preparing the PU white primer described in the first aspect of the present invention, comprising the following steps:

[0020] The raw materials for preparing component A, component B, and component C are mixed separately, and then the resulting mixture of component A, component B, and component C is mixed to obtain PU white primer.

[0021] A third aspect of the present invention provides a coating comprising the PU white primer described in the first aspect of the present invention.

[0022] In a fourth aspect, the present invention provides a furniture product, the surface of which is covered with the PU white primer described in the first aspect of the present invention.

[0023] According to some embodiments of the present invention, the PU white primer is applied to the surface of the furniture product by spraying or coating.

[0024] According to some embodiments of the present invention, the furniture product is a wooden furniture product or a stone furniture product.

[0025] According to some embodiments of the present invention, the stone furniture product is bathroom stone.

[0026] The fifth aspect of the present invention provides the application of the PU white primer described in the first aspect of the present invention, the coating described in the third aspect of the present invention, and the furniture products described in the fourth aspect of the present invention in the field of furniture and home decoration.

[0027] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Detailed Implementation

[0028] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0029] Unless otherwise specified in the detailed implementation method, follow the standard conditions or the manufacturer's recommended conditions. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0030] The hydroxyl acrylic resin used in the specific embodiments was purchased from Zhanxin (model 1263); blown castor oil was purchased from Changchuan Chemical (model 750); dispersant was purchased from Digo (model 655); defoamer was purchased from BYK Chemical (model BYK141); silica was purchased from Cabot (model M-5); titanium dioxide was purchased from Longbai (model BLR895); talc was purchased from Shenpeng Chemical (model 400 mesh); calcium carbonate was purchased from Taidi Chemical (model TD-230); leveling agent was purchased from Digo (model 410); organotin was purchased from Samsung Chemical (model ST-12); and HDI trimer was purchased from BASF (model H1100aP).

[0031] Example 1

[0032] This embodiment provides a PU white primer and its preparation method.

[0033] The preparation steps of the PU white primer in this embodiment are as follows:

[0034] (1) Preparation of component A: Weigh 60 parts of hydroxyl acrylic resin, 2 parts of blown castor oil, 0.1 parts of dispersant, 0.1 parts of defoamer, 1 part of cyclohexanone, 0.1 parts of silica, 5 parts of titanium dioxide, 19.7 parts of talc, 16 parts of calcium carbonate, 2 parts of butyl acetate, 1 part of leveling agent, 1 part of organotin, and 2 parts of propylene glycol methyl ether acetate according to the following weight proportions. Mix all raw materials and stir evenly to obtain component A.

[0035] (2) Prepare component B: Weigh 30 parts of HDI trimer, 30 parts of isocyanate prepolymer and 40 parts of butyl acetate according to the weight ratio, mix the raw materials and stir evenly to obtain component B;

[0036] (3) Prepare component C: Weigh 10 parts xylene, 30 parts butyl acetate, 45 parts propylene glycol methyl ether acetate and 15 parts dimethyl carbonate according to the weight ratio, mix the raw materials and stir evenly to obtain component C.

[0037] (4) Preparation of PU white primer: Weigh component A, component B and component C and mix them in a weight ratio of 100:30:50. Stir and mix evenly to obtain PU white primer.

[0038] In this embodiment, the method also includes manually spraying PU white primer (or manually applying or machine spraying) to obtain PU white primer for bathroom stone.

[0039] Example 2

[0040] This embodiment provides a PU white primer and its preparation method.

[0041] The preparation steps of the PU white primer in this embodiment are as follows:

[0042] (1) Preparation of component A: Weigh 30 parts of hydroxyl acrylic resin, 5 parts of blown castor oil, 1 part of dispersant, 1 part of defoamer, 5 parts of cyclohexanone, 1 part of silica, 13 parts of titanium dioxide, 23 parts of talc, 15 parts of calcium carbonate, 2 parts of butyl acetate, 1 part of leveling agent, 1 part of organotin, and 2 parts of propylene glycol methyl ether acetate according to the following weight proportions. Mix all raw materials and stir evenly to obtain component A.

[0043] (2) Prepare component B: Weigh 50 parts of HDI trimer, 20 parts of isocyanate prepolymer and 30 parts of butyl acetate according to the weight ratio, mix the raw materials and stir evenly to obtain component B;

[0044] (3) Preparation of component C: Weigh 30 parts xylene, 20 parts butyl acetate, 40 parts propylene glycol methyl ether acetate and 10 parts dimethyl carbonate according to the weight ratio, mix the raw materials and stir evenly to obtain component C.

[0045] (4) Preparation of PU white primer: Weigh component A, component B and component C and mix them in a weight ratio of 100:50:50. Stir and mix evenly to obtain PU white primer.

[0046] In this embodiment, the method also includes manually spraying PU white primer (or manually applying or machine spraying) to obtain PU white primer for bathroom stone.

[0047] Comparative Example 1

[0048] This comparative example provides a PU white primer and its preparation method.

[0049] The only difference between this comparative example and Example 1 is that the hydroxyl acrylic resin and blown castor oil in component A are replaced with an equal weight proportion of conventionally used alkyd resin; the other raw materials and preparation methods are the same as in Example 1.

[0050] Comparative Example 2

[0051] This comparative example provides a PU white primer and its preparation method.

[0052] The only difference between this comparative example and Example 2 is that the hydroxyl acrylic resin and blown castor oil in component A are replaced with an equal weight of conventionally used coconut oil resin. The other raw materials and preparation methods are the same as in Example 2.

[0053] Performance testing:

[0054] The PU white primers prepared in Examples 1 and 2 were subjected to appearance and performance tests, and the limits of hazardous substances were tested in accordance with GB 18581-2020 "Limits of Hazardous Substances in Wood Coatings" and GB / T 23997-2009 "Soluble-based Polyurethane Wood Coatings for Interior Decoration and Renovation". The results are shown in Table 1.

[0055] Table 1. Performance test results of PU white primer in Examples 1 and 2

[0056]

[0057] The performance of the PU white primer prepared in the embodiments of the present invention was compared with that of the comparative example, and the results are shown in Table 2.

[0058] Table 2 Comparison of resin raw materials and properties in the examples and comparative examples

[0059]

[0060]

[0061] The measured data above demonstrate that the PU white base coat of this invention possesses advantages such as water resistance, high temperature resistance, adhesion, strong hiding power, and high flexibility. The limits for harmful substances also meet national standards, fully satisfying the performance requirements of PU white base coats for wood and stone surfaces in kitchens and bathrooms. Furthermore, this invention utilizes hydroxyl acrylic resin and blown castor oil as main components, significantly improving the performance of the PU white base coat compared to currently used alkyd resins and coconut oil resins. This effectively solves the coating problems faced by many furniture factories, improving coating quality and increasing product added value.

[0062] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A PU white primer, characterized in that, The raw materials for preparation include component A, component B, and component C; by weight, Component A independently comprises 28-62 parts of hydroxyl acrylic resin, 1.5-6 parts of castor oil, 0.08-1.2 parts of dispersant, 0.08-1.2 parts of defoamer, 0.8-6 parts of cyclohexanone, 0.08-1.2 parts of silica, 4-15 parts of titanium dioxide, 18-25 parts of talc, 12-18 parts of calcium carbonate, 1-3 parts of butyl acetate, 0.1-1.5 parts of leveling agent, 0.1-1.5 parts of organotin, and 1-3 parts of propylene glycol methyl ether acetate; Component B independently comprises 25-45 parts of butyl acetate, 25-55 parts of HDI trimer, and 15-35 parts of isocyanate prepolymer; The component C independently comprises 8-35 parts xylene, 15-35 parts butyl acetate, 35-50 parts propylene glycol methyl ether acetate, and 8-20 parts dimethyl carbonate; the castor oil is blown castor oil.

2. The PU white primer according to claim 1, characterized in that, By weight parts Component A independently comprises 30-60 parts of hydroxyl acrylic resin, 2-5 parts of castor oil, 0.1-1 parts of dispersant, 0.1-1 parts of defoamer, 1-5 parts of cyclohexanone, 0.1-1 parts of silica, 5-13 parts of titanium dioxide, 19.7-23 parts of talc, 15-16 parts of calcium carbonate, 1.5-2.5 parts of butyl acetate, 0.5-1.2 parts of leveling agent, 0.5-1.2 parts of organotin, and 1.5-2.5 parts of propylene glycol methyl ether acetate. Component B independently comprises 30-40 parts of butyl acetate, 30-50 parts of HDI trimer, and 20-30 parts of isocyanate prepolymer; The component C independently comprises 10-30 parts xylene, 20-30 parts butyl acetate, 40-45 parts propylene glycol methyl ether acetate, and 10-15 parts dimethyl carbonate.

3. The PU white primer according to claim 1 or 2, characterized in that, The weight ratio of component A, component B, and component C is 1:(0.3~0.5):(0.45~0.55).

4. The method for preparing the PU white primer as described in claim 1 or 2, characterized in that, Includes the following steps: The raw materials for preparing component A, component B, and component C are mixed separately, and then the resulting mixture of component A, component B, and component C is mixed to obtain PU white primer.

5. A coating, characterized in that, The coating includes the PU white primer as described in any one of claims 1 to 3.

6. A furniture product, characterized in that, The surface of the furniture product is covered with the PU white primer as described in any one of claims 1 to 3.

7. The furniture product according to claim 6, characterized in that, The PU white primer is applied to the surface of the furniture product by coating.

8. The application of the PU white primer as described in any one of claims 1 to 3, or the coating as described in claim 5, or the furniture product as described in any one of claims 6 to 7 in the field of furniture and home decoration.

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