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Curing agent composition for water-based two-component coating

A water-based two-component, curing agent technology, used in the field of coating materials, can solve the problems of poor weather resistance, flexibility, poor adhesion, easy to turn yellow, etc., to reduce the dosage, avoid the initial reaction too slow, stable preservation Effect

Pending Publication Date: 2021-04-23
江西瀚泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current modified amine curing agent still has many defects, such as poor weather resistance, easy yellowing, poor flexibility and adhesion

Method used

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  • Curing agent composition for water-based two-component coating
  • Curing agent composition for water-based two-component coating
  • Curing agent composition for water-based two-component coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of curing agent for water-based two-component coatings: Dissolve triphenylmethane triisocyanate in dichloromethane, heat to 55°C at a constant temperature, drop in the compound shown in formula II while stirring, finish dropping within 2 hours, drop After the reaction at constant temperature for 1.5 h, the compound shown in formula I was obtained.

[0022] Obtain 264.6g of the compound shown in formula I, m / z 784.08, see the hydrogen spectrum figure 1 .

Embodiment 2

[0024] Preparation of curing agent composition: mix the compound shown in formula I of Example 1 with triphenylmethane triisocyanate and polyethylene glycol monomethyl ether to obtain final product; wherein, 2 parts by weight of triphenylmethane triisocyanate, 3 parts by weight of polyethylene glycol monomethyl ether, and 2 parts by weight of the compound represented by formula I.

Embodiment 3

[0026] Preparation of curing agent for water-based two-component coatings: Dissolve triphenylmethane triisocyanate in dichloromethane, heat to a constant temperature of 50°C, drop in the compound shown in formula II while stirring, finish dropping within 2 hours, drop After the reaction at constant temperature for 2 h, the compound shown in formula I was obtained.

[0027] 316.4g of the compound shown in formula I was obtained, m / z 784.08, see the hydrogen spectrum figure 1 .

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Abstract

The invention provides a curing agent for a water-based two-component coating. The structural formula of the curing agent is shown as a formula I defined in the description. The invention further provides a preparation method of the curing agent for the water-based two-component coating. The invention also provides a curing agent composition for the water-based two-component coating. Methyl (methylsulfonyl) carbamic acid is introduced into the prepared curing agent to seal isocyanate, the curing agent can be stably stored, meanwhile, unsealing can be achieved only through slight heating when the curing agent is used, and the curing speed can be controlled according to the heating temperature; and the curing agent has three NCO groups, and the elimination temperatures of the three NCO groups are different, so that the use amount of isocyanate can be greatly reduced, and the reaction speed and degree can be controlled.

Description

technical field [0001] The invention relates to the field of coating materials, in particular to a curing agent composition for water-based two-component coatings and a preparation method and application thereof. Background technique [0002] Due to the high viscosity of water-based resin raw materials and the high-speed dispersion that easily lead to resin demulsification, water-based epoxy coatings are currently widely used in the manufacturing process of water-based slurry. The process is cumbersome, the manufacturing cycle is long, and the energy consumption is high. During the manufacturing process, VOC-containing additives need to be added, and additional water is required, resulting in low solid content of the product. During coating construction, multiple coatings are required to achieve the desired effect. The consumption is high and the cycle is long. The water-based two-component coatings produced by this process can only replace oil-based products with VOC greate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/56C08G59/50C07C311/53C07C303/40C09D163/00
CPCC08G59/56C08G59/5033C07C311/53C07C303/40C09D163/00
Inventor 沈岳吕宏飞伍宽平沈君岱
Owner 江西瀚泰新材料科技有限公司