UV anaerobic double curing coating

A dual-curing, ultraviolet light technology, applied in the coating and other directions, can solve the problems of non-curing, human and environmental hazards, and inability to ensure complete curing of coating components, and achieve the effect of improving adhesion and boiling water resistance.

Active Publication Date: 2009-01-21
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for porous substrates such as wood, MDF, paper, etc., during the coating process of UV-curable coatings, some coating components, especially low-molecular reactive diluents, will penetrate into the pores of porous substrates, while UV Light cannot penetrate the substrate to reach these coating components, so they cannot cure
When the dual-curing UV-curable coating with an external curing agent is used on a porous substrate, due to the different materials of the porous substrate, th...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] (1) Preparation of acrylate reactive oligomer epoxy acrylate

[0020] Add 100g of epoxy E-51 into a four-necked flask with a stirrer, condenser, thermometer and dropping funnel, add 37g of acrylic acid and 0.5g of N dropwise from the dropping funnel at a fixed speed within 30min under stirring at 100°C, A mixture of N-dimethylethanolamine and 0.2 g of p-methoxyphenol. The mixture is stirred and kept at ≤100°C for reaction, and when the acid value drops below 5 mgKOH / g, the temperature is lowered to 70°C and the material is discharged, which is the acrylate active oligomer epoxy acrylate (A).

[0021] (2) The paint formula is expressed by the amount of 100g paint prepared, see Table 1 for details

[0022] Table 1

[0023] components

raw material name

Dosage (g)

Acrylic Reactive Oligomers

Epoxy acrylate (A)

30.0

Active diluent

Compounds with 1 ethylenically unsaturated double bond

Hydroxyethyl Acrylate

2...

Embodiment 2

[0028] Except for changing the coating formula (see Table 2), all the others are the same as in Example 1, and the obtained UV-anaerobic dual-curing coating can be used for wood protection.

[0029] Table 2

[0030] components

Embodiment 3

[0032] (1) Preparation of acrylate reactive oligomer urethane acrylate

[0033] Add 100g of polyether 210 to a four-necked flask with a stirrer, condenser, thermometer and dropping funnel, and add 35g of 2,4-body TDI dropwise from the dropping funnel at a fixed speed within 30min under stirring at 40°C. After keeping the temperature for three hours, a mixture of 28 g of hydroxypropyl acrylate, 0.014 g of dibutyltin dilaurate and 0.16 g of p-methoxyphenol was added. Stir the mixture at about 90°C and keep it warm for 6 hours. When the NCO content is reduced to 0.5%, the temperature is lowered to 60°C, and 5g of isopropanol is added and stirred evenly to obtain urethane acrylate (B), a reactive oligomer of acrylate.

[0034] (2) The paint formula is represented by the amount of 100g paint prepared, see Table 3 for details.

[0035] table 3

[0036] components

raw material name

Dosage (g)

Acrylic Reactive Oligomers

Urethane acrylate (B)

40.0

...

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Abstract

The invention relates to ultraviolet anaerobic dual-cured paint, containing an anaerobic curing agent combination. The paint consists of oxide initiator accounting for 30 to 60 percent, catalysts accounting for 10 to 35 percent and reduced matter accounting for 5 to 40 percent. The percentages of the components in the gross weight of the paint are as follows: acrylic ester active oligomer accounts for 30 to 60 percent; in active diluent, a compound with one olefinic unsaturated double bond, a compound with two olefinic unsaturated double bonds and a compound with three olefinic unsaturated double bonds respectively account for 5 to 30 percent, 0 to 20 percent and 5 to 20 percent; solvent accounts for 0 to 30 percent; photoinitiator accounts for 1-10 percent; additive accounts for 0 to 1 percent; and the anaerobic curing agent combination accounts for 0.1 to 5 percent. A paint film formed by the paint is level in exterior appearance, obviously increased in adhesive force, flexibility, hardness and boiling water resistance, and has no residual odor. The paint is especially applicable to the protection of wood, density boards, paper and other porous base materials.

Description

technical field [0001] The invention relates to an ultraviolet anaerobic dual curing coating, which is especially suitable for porous substrates such as wood, density board, and paper. Background technique [0002] Due to the advantages of rapid drying, high hardness and short production cycle, UV-curable coatings are currently being used in more and more fields. However, conventional UV-curable coatings also have their inherent defects: only the coating film that can be directly irradiated by ultraviolet light can undergo a relatively complete cross-linking reaction, so that the coating film is completely cured, thereby obtaining excellent coating film properties. However, for some objects with uneven surfaces, dead angles or yin and yang surfaces, when the coating film of the applied UV-curable coating is irradiated with ultraviolet light, some of the coating film cannot be irradiated by ultraviolet light, resulting in affect the performance of the final coating film. Fo...

Claims

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Application Information

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IPC IPC(8): C09D4/02
Inventor 王坚沈雪锋顾斌
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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