Ultraviolet-infrared double curing varnish coating and preparation method thereof

A dual-curing varnish, dual-curing technology, used in coatings, devices for coating liquids on surfaces, pre-treatment surfaces, etc., can solve the limitations of UV curing technology application and promotion, yellowing of protruding parts, large residual stress, etc. To improve long-term weather resistance and insufficient curing, reduce the content of residual photoinitiator and unreacted double bonds, and improve the conversion rate of double bonds

Active Publication Date: 2013-10-23
广东四方威凯新材料有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production process, the traditional UV-curable coatings also have many shortcomings, such as: not suitable for complex shapes, the shadow parts that cannot be irradiated by UV will cause insufficient curing, and the protruding parts may cause excessive UV irradiation energy and cause damage. Yellowing occurs; insufficient weather resistance; insufficient adhesion (large residual stress during curing); insufficient elasticity; skin irritation of paint, etc.
Based on the above factors, the application and promotion of UV curing technology in the field of automobiles and motorcycles is limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultraviolet-infrared double curing varnish coating and preparation method thereof
  • Ultraviolet-infrared double curing varnish coating and preparation method thereof
  • Ultraviolet-infrared double curing varnish coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of UR-1 dual-curing varnish: take 25g trifunctional aliphatic urethane acrylate oligomer (U680H of German BAYER company), 15g bifunctional aliphatic urethane acrylate oligomer (SARTOMER company CN965), 30g hydroxyl-containing Acrylate oligomer (Deqian M7), 15g of monomer A (3g of 1,6-ethylene glycol diacrylate and 12g of tripropylene glycol diacrylate mixture) was put into operation kettle A, and dispersed for 5 minutes at 1000RPM, Then add 2g compound free radical initiator (mixture of 1g α-hydroxy ketone initiator and 1g 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide initiator), 3g rheological modifier (1.5g dimethyl Base siloxane and 1.5g lauryl acrylate mixture), 10g of the first solvent (4g butyl ester, 3g toluene, 3g propylene glycol methyl ether acetate mixture) was added to the operation kettle B, and dispersed at 500RPM for 5 minutes. Add the mixture of working kettle B into working kettle A (300RPM) while dispersing, and then disperse at 1000...

Embodiment 2

[0042] Preparation of UR-1 dual-cure varnish: take 20g trifunctional aliphatic urethane acrylate oligomer (U680H of German BAYER company), 20g bifunctional aliphatic urethane acrylate oligomer (SARTOMER company CN965), 30g hydroxyl-containing Acrylate oligomer (Deqian M7), 10g of monomer A (3g of 1,6-ethylene glycol diacrylate and 12g of tripropylene glycol diacrylate mixture) was put into operation kettle A, and dispersed for 5 minutes at 1000RPM, Then 1.5g composite free radical initiator (0.8g α-hydroxy ketone initiator and 0.7g2,4,6 (trimethylbenzoyl) diphenylphosphine oxide initiator mixture), 3.5g rheological modifier ( A mixture of 1.5g dimethylsiloxane and 2g hydroxyethyl acrylate), 20g of the first solvent (a mixture of 8g butyl ester, 6g toluene, and 6g propylene glycol methyl ether acetate) were added to the operation kettle B, and dispersed at 500RPM for 5 minutes. Add the mixture of working kettle B into working kettle A (300RPM) while dispersing, and then dispers...

Embodiment 3

[0053] The preparation of UR-1 dual-curing varnish: take 15g trifunctional aliphatic urethane acrylate oligomer (U680H of German BAYER company), 25g bifunctional aliphatic urethane acrylate oligomer (SARTOMER company CN965), 30g hydroxyl-containing Acrylate oligomer (Deqian M7), 20g of monomer A (a mixture of 8g of 1,6-ethylene glycol diacrylate and 12g of tripropylene glycol diacrylate) was put into operation kettle A, dispersed at 1000RPM for 5 minutes, Then add 2g compound free radical initiator (mixture of 1g α-hydroxy ketone initiator and 1g 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide initiator), 3g rheological modifier (1.5g dimethyl Base siloxane and 1.5g hydroxypropyl acrylate mixture), 15g of the first solvent (3g butyl ester, 6g toluene, 6g propylene glycol methyl ether acetate mixture) was added to the operation kettle B, and dispersed at 500RPM for 5 minutes. Add the mixture of working kettle B into working kettle A (300RPM) while dispersing, and then disperse...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
wavelengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses an ultraviolet-infrared double curing varnish coating and a preparation method thereof. The varnish coating is prepared from UR-1 double curing varnish, a curing agent and a diluent in a mass ratio of (3-8):1:1. The curing process comprises an infrared preheating stage, an ultraviolet curing stage and an infrared curing stage, wherein at the first infrared preheating flash drying stage, a far infrared heating system with wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 70 and 80 DEG C for 2 to 3 minutes; at the second ultraviolet curing stage, ultraviolet rays with illuminance of 800 to 1,200mj / cm<2> irradiate the surface of the coating for 3 to 10 minutes; and at the third infrared curing stage, the far infrared heating system with the wavelength of 2.4 to 2.7mu m is adopted, and heating is performed at the temperature of between 120 and 130 DEG C for 5 to 10 minutes, so that the coating is cured to form a film. The problems that the surface of an irregular substrate is locally illuminated insufficiently and the coating has insufficient yellowing resistance and weather resistance are solved.

Description

technical field [0001] The invention relates to a curing coating, in particular to an ultraviolet-infrared dual curing varnish coating and a preparation method thereof. Background technique [0002] The traditional UV curing coating is an environmentally friendly coating. Its advantages are: short curing time, low curing temperature, harmless curing (CO 2 Less), the amount of excluded solvent (VOC) is small, the appearance of the coating film is smooth, the sharpness of image is high, the hardness is high, and the equipment cost is low. Because of its high efficiency, low energy consumption, and beautiful appearance, it was once favored by automobile, motorcycle, and electric vehicle manufacturers. However, in the production process, the traditional UV-curable coatings also have many shortcomings, such as: not suitable for complex shapes, the shadow parts that cannot be irradiated by UV will cause insufficient curing, and the protruding parts may cause excessive UV irradia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D7/12B05D3/06
Inventor 方芳朱洪江王伟
Owner 广东四方威凯新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap