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Flexible UV photocureable coating, and preparation method and application thereof

A light-curing coating and flexible technology, which is applied in the direction of epoxy resin coating, polyurea/polyurethane coating, coating, etc., can solve the problem of coating flexibility, insufficient aging resistance, damage to the health of operators, and hidden dangers of production safety, etc. problems, to achieve the effect of easy coating dispersion, good elasticity, and increased flexibility

Active Publication Date: 2020-05-12
JIANGSU SHENGYING NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Common leather coatings include acrylic resin emulsions, which are generally thermoplastic resins. The coating film has disadvantages such as hot stickiness, cold brittleness, and solvent resistance; in addition, there are leather finishing agents that are mainly solvent-based and some water-based polyurethane coatings. Solvents have excessive VOC residues, pollute the environment, and damage the health of operators, and at the same time bring hidden dangers to production safety.
At the same time, these commercially available leather finishing agents also have defects such as coating flexibility and insufficient aging resistance.

Method used

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  • Flexible UV photocureable coating, and preparation method and application thereof
  • Flexible UV photocureable coating, and preparation method and application thereof
  • Flexible UV photocureable coating, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0035] (a) Mix toluene diisocyanate and dibutyltin dilaurate into the reactor at a molar ratio of 1:0.01, raise the temperature to 40°C, and then drop pentaerythritol triacrylate containing the polymerization inhibitor p-hydroxyanisole (to ensure -NCO :-OH molar ratio=2:1), reacted at 40°C for 4h;

[0036] (b) Add a certain amount of dialkyl silicone oil (-NCO:-OH molar ratio = 1:1), continue to heat up to 70-75°C, and test the reaction product by Fourier transform infrared spectrum until the -NCO reaction is complete , stop the reaction to obtain the photocurable silicone acrylate.

preparation example 5

[0045] (a1) Add 2 mol of hexamethylene diisocyanate and catalyst dibutyltin laurate into the reaction kettle, raise the temperature to 40-50°C, and slowly drop 1 mol of polybutadiene diol into the In the reaction kettle, after reacting for 1 hour, the temperature was raised to 60°C;

[0046] (b1) Add 2 mol each of hydroxy acrylate and hydroquinone as a polymerization inhibitor, heat up to 70-80°C, test the reaction product by Fourier transform infrared spectrum until the -NCO infrared peak disappears completely, and at the same time, in order to reduce the viscosity of polyurethane After finishing, add 20% tripropylene glycol diacrylate to dilute, and stir evenly to obtain polybutadiene urethane acrylate.

Embodiment 1

[0059] A kind of ultra-flexible UV photocuring coating, its component in parts by weight is as shown in table 1;

[0060] The preparation steps of the coating described in this example are as follows: first preheat 400g of polybutadiene urethane acrylate, 200g of silicone modified acrylate and 100g of modified epoxy acrylate in an oven at 60°C for 6h, Increase the fluidity of the resin, then add it to the reaction kettle, then add 215g of isobornyl acrylate (IBOA), stir at 600r / min for 1-2h, after stirring evenly, add 80g of 2-hydroxy-2- Methyl-1-phenyl-1-propanone (1173) and 5 g of defoamer were stirred at 300 r / min and dispersed for 0.5 h to obtain the coating.

[0061] In the present invention, the UV photocurable coating is applied by spraying. Use a spray gun to spray a uniform paint film on the specified sample plate, without blanks and overflows. When spraying, the distance between the spray gun and the surface to be coated should not be less than 100mm, and the sprayi...

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Abstract

The invention discloses a flexible UV photocureable coating, and a preparation method and an application thereof, and relates to the field of material surface treatment agents. The coating comprises,by weight, 20 to 50 parts of polybutadiene urethane acrylate, 10 to 20 parts of organic silicon modified acrylate, 10 to 20 parts of modified epoxy acrylic resin, 10 to 30 parts of a reactive diluents, 0.2 to 1 part of an antifoaming agent and 3-7 parts of a photoinitiator. The polybutadiene urethane acrylate resin is excellent in flexibility, good in low-temperature bending resistance, rapid in curing, good in elasticity and high in glossiness; the main chain of the organic silicon modified acrylate is a silicon-oxygen bond, so that the flexibility of a coating layer formed by the coating canbe effectively improved, and meanwhile, the water resistance and the heat-resistant adhesion of the coating layer are improved; solvent-free one-step photocuring film forming of the coating layer isachieved, and is green, environment-friendly and simple; and the coating can be applied to surfaces of paper, wood, plastic, metal, stone, glass, ceramic and the like, especially leather.

Description

technical field [0001] The invention relates to the field of material surface treatment agents, in particular to a flexible UV photocurable coating and its preparation method and application. Background technique [0002] Ultraviolet (UV) curing is an advanced technology for surface treatment of materials that emerged in the 1960s. UV curing mainly uses ultraviolet light to trigger rapid polymerization and crosslinking of chemically active liquid materials, and instantly solidifies them into solid materials. Compared with traditional water-based coatings and oil-based coatings, UV-curable coatings have the advantages of high efficiency, environmental protection, energy saving, economy, and wide adaptability. Therefore, as one of the important means to reduce VOC emissions, UV light-curing coatings have been widely promoted. [0003] Light-curing coatings can be applied to a variety of substrates, such as paper, wood, plastic, metal, stone, glass, ceramics, leather, etc. F...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D163/10C09D7/65C08G18/73C08G18/69C08G18/10C08G18/76C08G18/67C08G18/28C08G18/32
CPCC08G18/10C08G18/673C08G18/69C08G18/73C08G18/7614C08L2205/025C08L2205/035C09D175/14C09D7/65C08L63/10C08L75/14C08G18/2805C08G18/3215C08G18/61
Inventor 董海普乔丽娜杜灿谢允斌
Owner JIANGSU SHENGYING NEW MATERIAL
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