阅读说明：本技术 用于中纤板贴三聚氰胺纸免打磨uv附着底漆及制备方法 (Polishing-free UV (ultraviolet) adhesion primer for pasting melamine paper on medium density fiberboard and preparation method thereof ) 是由 欧政忠 王超辉 于 2021-10-19 设计创作，主要内容包括：本发明涉及涂料技术领域,公开了用于中纤板贴三聚氰胺纸免打磨UV附着底漆及制备方法,按质量组分包括：环氧丙烯酸酯树脂30-50％,聚氨酯丙烯酸酯树脂0-25％,活性稀释剂5-50％,引发剂3-5％,分散剂0.2-1％,流平剂0.2-0.5％,消泡剂0.1-0.3％,二氧化硅气凝胶0.5-1％,环氧磷酸酯类树脂2-3％,填料0-20％。本发明中的免打磨UV附着底漆可直接辊涂于未经处理的三聚氰胺纸上,辊涂后不需要待干直接UV机固化,固化后呈半干状态,可直接接淋涂亮光清面漆,该底漆附着力优异,不需打磨直接进行二次涂装不会出现脱层等,规避了打磨三聚氰胺纸被破坏的情况和UV底漆打磨后才能喷涂面漆的情况,节省了人工和提高了生产效率。(The invention relates to the technical field of coatings, and discloses polishing-free UV (ultraviolet) adhesion primer for medium density fiberboard melamine paper pasting and a preparation method thereof, wherein the polishing-free UV adhesion primer comprises the following components in parts by mass: 30-50% of epoxy acrylate resin, 0-25% of polyurethane acrylate resin, 5-50% of reactive diluent, 3-5% of initiator, 0.2-1% of dispersant, 0.2-0.5% of flatting agent, 0.1-0.3% of defoamer, 0.5-1% of silica aerogel, 2-3% of epoxy phosphate resin and 0-20% of filler. The polishing-free UV adhesion primer can be directly coated on untreated melamine paper in a roller way, the UV adhesion primer does not need to be dried after roller coating and is directly cured by a UV machine, the cured UV adhesion primer is in a semi-dry state, the UV adhesion primer can be directly coated with bright clear finish by spraying, the primer has excellent adhesion, secondary coating can be directly carried out without polishing, delamination and the like can not occur, the condition that the polished melamine paper is damaged and the condition that the finish can be sprayed after the UV adhesion primer is polished are avoided, labor is saved, and the production efficiency is improved.)

1. A exempt from to polish and adhere to UV priming paint for well fine board pastes melamine paper, its characterized in that includes according to the mass component: 30-50% of epoxy acrylate resin, 0-25% of polyurethane acrylate resin, 5-50% of reactive diluent, 3-5% of initiator, 0.2-1% of dispersant, 0.2-0.5% of flatting agent, 0.1-0.3% of defoamer, 0.5-1% of silica aerogel, 2-3% of epoxy phosphate resin and 0-20% of filler.

2. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the reactive diluent is an acrylic acid monomer or an acrylic acid derivative monomer.

3. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the initiator is 2-hydroxy-2-methyl-1-phenyl acetone.

4. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the dispersant is a high molecular copolymer dispersant.

5. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the flatting agent is a fluorine modified acrylate flatting agent.

6. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the defoaming agent is a polyether defoaming agent.

7. The sanding-free UV adhesion primer for medium density fiberboard melamine paper according to claim 1, characterized in that: the filler is 1250-mesh talcum powder.

8. The preparation method of the sanding-free UV adhesion primer for the melamine-coated medium density fiberboard is used for preparing the sanding-free UV adhesion primer for the melamine-coated medium density fiberboard of any one of claims 1 to 7, and is characterized by comprising the following steps of: putting the acrylate resin and the polyurethane acrylate resin into a dispersion cylinder, adding part of reactive diluent, dispersing for 5 minutes at the rotating speed of 500 plus 800r/min to completely mix and dissolve the resin and the reactive diluent, then sequentially adding the dispersing agent, the defoaming agent, the leveling agent, the initiator and the adhesion promoter, then adjusting the rotating speed of 1200 plus 1500r/min to disperse for 10-15 minutes, then sequentially adding the anti-settling agent and the filler, controlling the rotating speed of 1500 plus 1800r/min to disperse for 20-25 minutes, and adjusting the viscosity to be qualified by using the residual reactive diluent after the fineness is detected to be less than or equal to 30 micrometers.

Technical Field

The invention relates to the technical field of coatings, in particular to a polishing-free UV (ultraviolet) adhesion primer for pasting melamine paper on a medium density fiberboard and a preparation method thereof.

Background

In recent years, the UV coating is rapidly developed, has the advantages of high construction efficiency, short working hours, no VOC (volatile organic compounds) emission and the like, and gradually occupies an important position in the field of furniture. However, with the increasing application of melamine paper pasted on medium density fiberboard, the general adhesion between the UV primer and the melamine paper is poor, mainly because melamine is a special inert chemical material, and meanwhile, materials such as a release agent and the like can be added in the manufacturing process of the melamine board, so that the common UV paint cannot be well combined with melamine, and the problems of poor adhesion, paint removal and the like are caused.

In order to solve the problem of adhesive force, a common manufacturer can polish melamine paper and then spray PU primer, so that the problem of adhesive force in delivery can be solved, but the melamine paper is easy to damage by polishing the melamine paper, the original pattern effect is poor, the drying time of the PU primer is long, and the later-stage adhesive force condition cannot be guaranteed in a limited way; and the common roller coating primer needs to be polished to be used as the finish, so that the working hours are prolonged, and the adhesive force risk is increased.

Disclosure of Invention

Based on the problems, the polishing-free UV adhesion primer for adhering the melamine paper to the medium density fiberboard and the preparation method thereof provided by the invention can effectively solve the problem of poor adhesion between the melamine paper and the UV primer, and simultaneously solve the problems that the polished melamine paper is damaged and the UV primer can be sprayed with the finish after polishing, thereby saving labor and improving the production efficiency.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the polishing-free UV adhesion primer for adhering melamine paper to a medium density fiberboard comprises the following components in parts by mass: 30-50% of epoxy acrylate resin, 0-25% of polyurethane acrylate resin, 5-50% of reactive diluent, 3-5% of initiator, 0.2-1% of dispersant, 0.2-0.5% of flatting agent, 0.1-0.3% of defoamer, 0.5-1% of silica aerogel, 2-3% of epoxy phosphate resin and 0-20% of filler.

Further, the reactive diluent is an acrylic acid monomer or an acrylic acid derivative monomer.

Further, the initiator is 2-hydroxy-2-methyl-1-phenyl acetone.

Further, the dispersant is a polymer copolymer dispersant.

Further, the leveling agent is a fluorine modified acrylate leveling agent.

Further, the defoaming agent is a polyether defoaming agent.

Further, the filler was 1250 mesh talc.

In order to realize the technical effects, the invention also provides a preparation method of the polishing-free UV adhesion primer for pasting the melamine paper on the medium density fiberboard, which comprises the following steps: putting the acrylate resin and the polyurethane acrylate resin into a dispersion cylinder, adding part of reactive diluent, dispersing for 5 minutes at the rotating speed of 500 plus 800r/min to completely mix and dissolve the resin and the reactive diluent, then sequentially adding the dispersing agent, the defoaming agent, the leveling agent, the initiator and the adhesion promoter, then adjusting the rotating speed of 1200 plus 1500r/min to disperse for 10-15 minutes, then sequentially adding the anti-settling agent and the filler, controlling the rotating speed of 1500 plus 1800r/min to disperse for 20-25 minutes, and adjusting the viscosity to be qualified by using the residual reactive diluent after the fineness is detected to be less than or equal to 30 micrometers.

Compared with the prior art, the invention has the beneficial effects that:

1. the polishing-free UV adhesion primer can be directly coated on untreated melamine paper in a roller way, the UV adhesion primer does not need to be dried after roller coating and is directly cured by a UV machine, the cured UV adhesion primer is in a semi-dry state, the UV adhesion primer can be directly coated with bright clear finish by spraying, the primer has excellent adhesion, secondary coating can be directly carried out without polishing, delamination and the like can not occur, the condition that the polished melamine paper is damaged and the condition that the finish can be sprayed after the UV adhesion primer is polished are avoided, labor is saved, and the production efficiency is improved.

2. The organic silicon additive and the grinding additive are not added; and the addition of the initiator and the acrylate resin provides good adhesive force with the curtain coating finish paint without polishing, and the paint film can achieve the effect consistent with polishing, thereby realizing the effect of completely showing the color of the melamine paper.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.

Example 1:

the polishing-free UV adhesion primer for adhering melamine paper to a medium density fiberboard comprises the following components in parts by mass: 30-50% of epoxy acrylate resin, 0-25% of polyurethane acrylate resin, 5-50% of reactive diluent, 3-5% of initiator, 0.2-1% of dispersant, 0.2-0.5% of flatting agent, 0.1-0.3% of defoamer, 0.5-1% of silica aerogel, 2-3% of epoxy phosphate resin and 0-20% of filler.

The preparation method of the polishing-free UV adhesion primer comprises the following steps:

putting the acrylate resin and the polyurethane acrylate resin into a dispersion cylinder, adding part of reactive diluent, dispersing for 5 minutes at the rotating speed of 500 plus 800r/min to completely mix and dissolve the resin and the reactive diluent, then sequentially adding the dispersing agent, the defoaming agent, the leveling agent, the initiator and the adhesion promoter, then adjusting the rotating speed of 1200 plus 1500r/min to disperse for 10-15 minutes, then sequentially adding the anti-settling agent and the filler, controlling the rotating speed of 1500 plus 1800r/min to disperse for 20-25 minutes, and adjusting the viscosity to be qualified by using the residual reactive diluent after the fineness is detected to be less than or equal to 30 micrometers.

In the embodiment, the polishing-free UV primer can be directly roll-coated on untreated melamine paper, the coating does not need to be dried after roll coating, and the coating is directly cured by a UV machine, so that the urethane acrylate oligomer in the raw material has good adhesion to the melamine paper; the added epoxy phosphate resin as the resin adhesion promoter can generate a synergistic effect with the aliphatic urethane acrylate oligomer to further improve the adhesion condition to the base material, and has good compatibility. When the polishing-free UV primer is in a semi-dry state after being cured, the polishing-free UV primer can be directly coated with the bright clear finish by spraying. According to the embodiment, the adhesive force of the melamine board is improved by adopting the aliphatic polyurethane acrylate oligomer and the adhesive force promoter, the adhesive force of the polishing-free UV primer is excellent, secondary coating is directly carried out without polishing, delamination and the like do not occur, the condition that polishing melamine paper is damaged and the condition that finish paint can be sprayed after polishing the UV primer is avoided, manpower is saved, and the production efficiency is improved.

The reactive diluent in the embodiment is an acrylic acid monomer or an acrylic acid derivative monomer, and the crosslinking density of a paint film is greatly improved by adopting the reactive diluent, so that the primer has high density and can meet the requirement of spraying finish paint without polishing; the initiator is 2-hydroxy-2-methyl-1-phenyl acetone, and the initiator also provides curing efficiency and solves the problem of curing time. The dispersing agent is a high-molecular copolymer dispersing agent, the flatting agent is a fluorine modified acrylate flatting agent, the defoaming agent is a polyether defoaming agent, and the filler is 1250-mesh talcum powder. The additive does not contain an organic silicon additive and a polishing additive; and the addition of the initiator and the acrylate resin provides good adhesive force with the curtain coating finish paint without polishing, and the paint film can achieve the effect consistent with polishing and can completely show the color effect of the melamine paper.

The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only for the purpose of clearly illustrating the process of verifying the invention and are not intended to limit the scope of the invention, which is defined by the claims, and all the equivalent structural changes made by applying the content of the specification of the invention should be covered by the scope of the invention.