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Compound photoinitiator with low yellowing performance and high activity

A photoinitiator and initiator technology, applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve problems that are in the experimental research and development stage, have not been widely used, and are limited to a small field

Inactive Publication Date: 2017-06-13
TIANJIN JIURI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although light curing technology has many advantages, the problem of yellowing has always limited its application in areas with strict color requirements, such as white wood, home appliances and electronic products, etc.
At present, there are few reports on low-yellowing photoinitiators, most of which are in the experimental development stage or limited to a small field, and have not been widely used.

Method used

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  • Compound photoinitiator with low yellowing performance and high activity
  • Compound photoinitiator with low yellowing performance and high activity
  • Compound photoinitiator with low yellowing performance and high activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1 A mixture of 30% diethylene glycol mono-benzoylformate and diethylene glycol diester benzoylformate and 70% 1-hydroxy-cyclohexyl-phenyl-methanone.

[0079] The specific composition of the photocuring system is shown in Table 1, and the exposure is performed according to the exposure conditions in Table 2.

[0080] Table 1: Light curing system formulation:

[0081]

[0082] Table 2: Exposure Conditions:

[0083]

[0084] After the above formula is exposed according to the above exposure conditions, the overall curing of the coating obtained is good, the surface is smooth and uniform, the pencil hardness is >6H, the yellowing index δYI is 0.48, and the curing rate of the coating is 75% after 10 seconds of exposure, indicating that the coating has good light Initiating activity and low yellowing.

Embodiment 210

[0085] Example 2 10% mixture of diethylene glycol monoester benzoylformate and diethylene glycol diester benzoylformate, compounded with 80% BP and 10% 2,4,6-trimethylbenzoyl diphenoxyphosphine

[0086] The specific composition of the photocuring system is shown in Table 3, and the exposure is performed according to the exposure conditions in Table 4.

[0087] Table 3: Light curing system formulation:

[0088]

[0089] Table 4: Exposure Conditions:

[0090]

[0091] After the above formula is exposed according to the above exposure conditions, the overall curing of the coating obtained is good, the surface is smooth and uniform, the pencil hardness is >6H, the yellowing index δYI is 0.22, and the curing rate of the coating is 80% after 10 seconds of exposure, indicating that the coating has good light Initiating activity and low yellowing.

Embodiment 340

[0092] Example 3 Compound of 40% 2-hydroxy-2-methyl-1-phenyl-1-propanone, 40% benzophenone and 20% 2,4,6-trimethylbenzoyl diphenoxyphosphine

[0093] The specific composition of the photocuring system is shown in Table 5, and the exposure is performed according to the exposure conditions in Table 6.

[0094] Table 5: Light curing system formulation:

[0095]

[0096] Table 6: Exposure Conditions:

[0097]

[0098] After the above formula is exposed according to the above exposure conditions, the overall curing of the coating obtained is good, the surface is smooth and uniform, the pencil hardness is >6H, the yellowing index δYI is 0.35, and the curing rate of the coating after 10 seconds of exposure is 90%, which shows that the coating has good light Initiating activity and low yellowing.

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Abstract

The invention discloses a compound photoinitiator with low yellowing performance and high activity. A benzoyl ester hotoinitiator, an alpha-hydroxy-ketone hotoinitiator, a diphenyl ketone hotoinitiator and an acyl phosphine oxide photoinitiator are compouded according to a certain type and proportion. The compound photoinitiator with low yellowing performance and high activity, disclosed by the invention, can satisfy requirements of multiple fields on low yellowing performance and has the advantages of convenient use, low price and high photoinitiating activity. The compound photoinitiator with low yellowing performance and high activity can meet the use requirements of most fields with higher requirements on deep curing, low yellowing performance, high activity, good surface drying effect and so on by changing the mixing ratio of the compound photoinitiator.

Description

technical field [0001] The invention relates to a kind of low-yellowing and high-activity composite photoinitiator. Background technique [0002] In recent years, with the promulgation of more and more stringent environmental protection regulations, the application of light curing technology in the coating industry has attracted more and more attention. Photocuring technology refers to the use of light energy to instantly transform liquid resin monomers into solid coatings or other products with certain properties. Compared with the traditional solvent-based thermal curing technology, light curing has great advantages in terms of environmental protection, energy saving, efficiency, economy, and controllability, and has been widely used in many fields. [0003] Although light curing technology has many advantages, the problem of yellowing has always limited its application in areas with strict color requirements, such as white wood, home appliances and electronic products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/48C09D175/14C09D163/10C09D167/06C09D7/12
CPCC08F2/48C09D7/63C09D163/10C09D167/06C09D175/14
Inventor 董月国赵建新武瑞崔继菲张齐赵国锋
Owner TIANJIN JIURI NEW MATERIALS CO LTD
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