UV light-cured gypsum board waterproof sealing primer and preparation method thereof

Abstract

The invention relates to the technical field of UV coatings, in particular to a UV light-cured gypsum board waterproof sealing primer and a preparation method thereof. The preparation raw materials at least comprise the following components: 30 to 50 parts of a photocuring oligomer, 20 to 40 parts of an acrylate monomer, 10 to 30 parts of an inorganic filler, 3 to 8 parts of a photoinitiator, 0.001 to 0.5 part of a wetting agent, 0.001 to 0.5 part of a leveling agent, 0.001 to 0.5 part of a defoaming agent, 0.001 to 1 part of an adhesion promoter and 0.01 to 2 parts of matting powder. After film formation, the waterproof sealing performance is excellent, the odor is low, and the market application and popularization value is extremely high.

Description

Technical Field

[0001] The invention relates to the technical field of UV coatings, in particular to a UV light-curing gypsum board waterproof sealing primer and a preparation method thereof. Background Art

[0002] UV curing coatings, due to their excellent performance, meet the needs of people's increasing environmental awareness, have huge development potential, and are currently more and more widely used in various fields. They have been widely used in different fields such as architectural coatings, sporting goods, electronic communications, packaging materials and automobiles, such as on substrates such as paper, wood, plastics, metals, and stones, and have been well applied. As people's environmental awareness increases day by day, more and more people will choose a more environmentally friendly coating product suitable for them, which also puts forward better requirements for coating products. For example, Chinese patent (publication number is CN109233490A) discloses a water-based indoor environmentally friendly flame retardant alkali-resistant primer and a preparation method thereof, by adopting epoxy-modified polymer small-particle styrene acrylic emulsion to cooperate with organosilicon-modified fluorocarbon emulsions to ensure the comprehensive performance of the product, meet the alkali resistance, fire resistance, and waterproof performance requirements of concrete, gypsum board, etc., but the waterproof sealing performance of gypsum board needs to be further improved. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a UV light-curing gypsum board waterproof sealing primer, which can achieve good curing film-forming effect on the surface of the gypsum board. After film formation, it has excellent waterproof sealing performance and low odor, and has extremely high market application and promotion value.

[0004] On the one hand, the present invention provides a UV light-curing gypsum board waterproof sealing primer, and its preparation raw materials include at least the following components, measured by weight: 30-50 parts of light-curing oligomers, 20-40 parts of acrylate monomers, 10-30 parts of inorganic fillers, 3-8 parts of photoinitiators, 0.001-0.5 parts of wetting agents, 0.001-0.5 parts of leveling agents, 0.001-0.5 parts of defoaming agents, 0.001-1 parts of adhesion promoters, and 0.01-2 parts of matting powder.

[0005] As a preferred technical solution, the photocurable oligomer includes at least epoxy acrylate and polyurethane acrylate.

[0006] As a preferred technical solution, the viscosity of the polyurethane acrylate at 60° C. is 1000-5000 cps, preferably 1500-2500 cps.

[0007] As a preferred technical solution, the polyurethane acrylate has a functional group number of 4-9, and is preferably a hexafunctional aliphatic polyurethane acrylate.

[0008] As a preferred technical solution, the epoxy acrylate at least includes epoxy acrylate A having a viscosity of 10000-60000 cps at 25°C.

[0009] Preferably, the viscosity of the epoxy acrylate A at 25° C. is 28500-40000 cps.

[0010] As a preferred technical solution, the epoxy acrylate further includes epoxy acrylate B having a viscosity of 20,000-40,000 cps at 25°C.

[0011] As a preferred technical solution, the mass ratio of the polyurethane acrylate, epoxy acrylate A, and epoxy acrylate B is (5-10):(5-10):(20-40), preferably 8:8:(20-30).

[0012] The present invention optimizes the combination of light-curing oligomers, acrylate monomers, inorganic fillers and other additives in the sealing primer formula system, so that the provided sealing primer meets the actual application performance requirements and construction requirements of gypsum board. Specifically, by comprehensively controlling the viscosity and addition amount of hexafunctional aliphatic polyurethane acrylate, epoxy acrylate oligomer A and epoxy acrylate oligomer B in the light-curing oligomer, especially when the mass ratio of polyurethane acrylate, epoxy acrylate A and epoxy acrylate B is (5-10): (5-10): (20-40), they are combined with the acrylate monomers in the system to comprehensively ensure the adhesion, yellowing resistance, weather resistance, flexibility, impact resistance and waterproof performance of the paint film, and better meet the sealing requirements of gypsum board.

[0013] As a preferred technical solution, the acrylic ester monomer includes at least pentaerythritol triacrylate (PETA).

[0014] Preferably, the acrylic ester monomers further include dipropylene glycol diacrylate (DPGDA) and 1,6-hexanediol diacrylate (HDDA).

[0015] Preferably, the mass ratio of pentaerythritol triacrylate (PETA), dipropylene glycol diacrylate (DPGDA) and 1,6-hexanediol diacrylate (HDDA) is (5-15):(10-15):(5-10), preferably 10:(10-15):8.

[0016] As a preferred technical solution, the inorganic filler at least includes talc.

[0017] Preferably, the particle size of the talc is 800-2000 mesh, preferably 1000-1500 mesh.

[0018] As a preferred technical solution, the photoinitiator includes at least photoinitiator TPO, photoinitiator 1173, and photoinitiator 575.

[0019] Preferably, the mass ratio of the photoinitiator TPO, the photoinitiator 1173 and the photoinitiator 575 is (0.1-1):(2-5):(1-4), preferably 0.5:(2-4):(2-3).

[0020] Furthermore, the system of the present invention introduces acrylate monomers including pentaerythritol triacrylate, dipropylene glycol diacrylate, and 1,6-hexanediol diacrylate, and controls the particle size and addition amount of talcum powder. With the cooperation of auxiliary agents, the talcum powder is evenly dispersed in the system to ensure the appearance and comprehensive performance of the paint film after curing. Compared with UV primer products on the market, the system has significantly improved weather resistance, yellowing resistance, and waterproof performance.

[0021] Preferably, the wetting agent is BYK3505.

[0022] Preferably, the leveling agent is BYK358N.

[0023] Preferably, the defoaming agent is Tego920.

[0024] Preferably, the matting powder is A360Z.

[0025] Preferably, the adhesion promoter is Adherant 1051.

[0026] Another aspect of the present invention provides a method for preparing a UV light-curing gypsum board waterproof sealing primer, which comprises at least the following steps:

[0027] (1) Add photocurable oligomer, acrylate monomer and wetting agent in sequence, and stir and disperse at 300-600 rpm for 5-30 min to obtain material A;

[0028] (2) Adding a leveling agent, a defoaming agent, a photoinitiator, an inorganic filler, and a matting powder to material A in sequence, stirring and dispersing at 800-1000 rpm for 5-30 min to obtain material B;

[0029] (3) Add the adhesion promoter to material B and stir and disperse at 500-800 rpm for 3-10 minutes.

[0030] The sealing primer provided by the invention has readily available raw materials, simple production process, mechanical equipment for production and construction, high production efficiency, meets national environmental protection requirements, and is easy to realize large-scale industrial production and application.

[0031] Beneficial Effects

[0032] 1. The present invention provides a UV light-curing gypsum board waterproof sealing primer, which achieves a good curing film-forming effect on the surface of the gypsum board. After film formation, it has excellent waterproof sealing performance and low odor, and has extremely high market application and promotion value.

[0033] 2. The present invention optimizes the combination of light-curing oligomers, acrylate monomers, inorganic fillers and other additives in the sealing primer formula system, so that the provided sealing primer meets the actual application performance requirements and construction requirements of gypsum board.

[0034] 3. The present invention comprehensively controls the viscosity and addition amount of hexafunctional aliphatic polyurethane acrylate, epoxy acrylate oligomer A and epoxy acrylate oligomer B in the photocurable oligomer, especially when the mass ratio of polyurethane acrylate, epoxy acrylate A and epoxy acrylate B is (5-10): (5-10): (20-40), and then combines with the acrylate monomer in the system to comprehensively ensure the adhesion, yellowing resistance, weather resistance, flexibility, impact resistance and waterproof performance of the paint film, so as to better meet the sealing requirements of gypsum board.

[0035] 4. In the system of the present invention, acrylate monomers including pentaerythritol triacrylate, dipropylene glycol diacrylate and 1,6-hexanediol diacrylate are introduced, and the particle size and addition amount of talcum powder are controlled. With the cooperation of auxiliary agents, the talcum powder is evenly dispersed in the system to ensure the appearance and comprehensive performance of the paint film after curing. Compared with the UV primer products on the market, the weather resistance, yellowing resistance and waterproof performance are significantly improved.

[0036] 5. The sealing primer provided by the present invention has readily available raw materials, simple production process, mechanical equipment for production and construction, high production efficiency, meets national environmental protection requirements, and is easy to realize large-scale industrial production and application. DETAILED DESCRIPTION

[0037] Example 1

[0038] Example 1 of the present invention provides a UV light-curing gypsum board waterproof sealing primer, and the formula is shown in Table 1 in parts by weight.

[0039] Table 1

[0040]

[0041] Embodiment 1 of the present invention provides a method for preparing a UV light-curing gypsum board waterproof sealing primer, comprising the following steps:

[0042] (1) epoxy acrylate 6105-80, epoxy acrylate 621A-80, polyurethane acrylate ST8606, pentaerythritol triacrylate PETA, dipropylene glycol diacrylate DPGDA, 1,6-hexanediol diacrylate HDDA, and a wetting agent were added in sequence, and stirred and dispersed at 500 rpm for 10 min to obtain material A;

[0043] (2) Add leveling agent, defoaming agent, photoinitiator TPO, photoinitiator 1173, inorganic filler, photoinitiator 575, and matting powder to material A in sequence, and stir and disperse at 1000 rpm for 10 min to obtain material B;

[0044] (3) Add the adhesion promoter to material B and stir and disperse at 600 rpm for 5 minutes.

[0045] Application Example 1

[0046] Application Example 1 of the present invention provides a waterproof gypsum board, which is prepared by the steps shown in Table 2.

[0047] Table 2

[0048]

[0049] Application Example 2

[0050] Application Example 2 of the present invention provides a waterproof gypsum board, and its specific implementation method is the same as that of Application Example 1, except that the UV light-curing gypsum board waterproof sealing primer provided in Example 1 in steps 3, 5, and 6 is replaced by Clivia C-424 ordinary roller-coated UV primer.

[0051] Application Example 3

[0052] Application Example 3 of the present invention provides a waterproof gypsum board, and its specific implementation method is the same as that of Application Example 1, except that the UV light-curing gypsum board waterproof sealing primer provided in Example 1 in steps 3, 5, and 6 is replaced by Clivia C-438 ordinary roller-coated UV primer.

[0053] Application Example 4

[0054] Application Example 4 of the present invention provides a waterproof gypsum board, and its specific implementation method is the same as that of Application Example 1, except that the UV light-curing gypsum board waterproof sealing primer provided in Example 1 in steps 3, 5, and 6 is replaced by a commercially available product (product model C-426).

[0055] Performance Testing

[0056] The waterproof gypsum boards provided in Application Examples 1-4 were subjected to the tests shown in Table 7. The test methods are as follows. The test results are shown in Table 3.

[0057] Table 3

[0058]

[0059]

Claims

1. A UV light-curing gypsum board waterproof sealing primer, characterized in that: The raw materials for its preparation include at least the following components by weight: 30-50 parts of photocurable oligomer, 20-40 parts of acrylate monomer, 10-30 parts of inorganic filler, 3-8 parts of photoinitiator, 0.001-0.5 parts of wetting agent, 0.001-0.5 parts of leveling agent, 0.001-0.5 parts of defoaming agent, 0.001-1 parts of adhesion promoter and 0.01-2 parts of matting powder.

2. The UV light-curing gypsum board waterproof sealing primer according to claim 1, characterized in that: The photocurable oligomer includes at least epoxy acrylate and polyurethane acrylate.

3. The UV light-curing gypsum board waterproof sealing primer according to claim 2, characterized in that: The viscosity of the polyurethane acrylate at 60° C. is 1000-5000 cps.

4. The UV light-curing gypsum board waterproof sealing primer according to claim 3, characterized in that: The epoxy acrylate at least includes epoxy acrylate A having a viscosity of 10000-60000 cps at 25°C.

5. The UV light-curing gypsum board waterproof sealing primer according to claim 4, characterized in that: The epoxy acrylate also includes epoxy acrylate B having a viscosity of 20,000-40,000 cps at 25°C.

6. The UV light-curing gypsum board waterproof sealing primer according to claim 5, characterized in that: The mass ratio of the polyurethane acrylate, epoxy acrylate A and epoxy acrylate B is (5-10): (5-10): (20-40).

7. The UV light-curing gypsum board waterproof sealing primer according to claim 6, characterized in that: The acrylic ester monomer includes at least pentaerythritol triacrylate.

8. The method for preparing the UV light-curing gypsum board waterproof sealing primer according to claim 7, characterized in that: The acrylic acid ester monomers further include dipropylene glycol diacrylate and 1,6-hexanediol diacrylate.

9. The UV light-curing gypsum board waterproof sealing primer according to claim 8, characterized in that: The inorganic filler includes at least talc.

10. A method for preparing the UV light-curing gypsum board waterproof sealing primer according to any one of claims 1 to 9, characterized in that: At least the following steps are included: (1) Add photocurable oligomer, acrylate monomer and wetting agent in sequence, and stir and disperse at 300-600 rpm for 5-30 min to obtain material A; (2) Adding a leveling agent, a defoaming agent, a photoinitiator, an inorganic filler, and a matting powder to material A in sequence, stirring and dispersing at 800-1000 rpm for 5-30 min to obtain material B; (3) Add the adhesion promoter to material B and stir and disperse at 500-800 rpm for 3-10 minutes.

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