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A kind of polyurethane resin and its preparation method and application

A technology of polyurethane resin and epoxy resin, which is applied in the field of polyurethane, can solve the problems that the performance is not easy to achieve two-component products, the proportion of workers is not suitable, and the cured product cannot be achieved, so as to achieve high gloss and fullness, and better performance , the effect of reducing the requirement

Active Publication Date: 2021-10-15
广州昊毅新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current technology mainly uses a solvent-free two-component system. Workers are prone to improper proportions in actual operation, or cause foaming when the humidity is high, so that the cured product cannot meet the set requirements.
Moreover, the performance of a one-component system is not easy to achieve the performance of a two-component product, and often requires a relatively large molecular weight, so it is necessary to add a large amount of organic solvents to adjust the viscosity during construction and paint making, causing physical damage to workers unfriendly to the environment

Method used

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  • A kind of polyurethane resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example polyurethane resin is made from the following components by mass: 5 parts of hexadecylamine modified epoxy resin, 85 parts of castor oil modified diol (number average molecular weight 2000), 25 parts of IPDI, 27.9 parts of trimethylol propane diallyl ether.

[0043]In all examples, the preparation method of hexadecylamine modified epoxy resin is as follows: first put epoxy resin E-51 into a three-necked flask, reflux and place it in a water bath environment at 65°C, drop hexadecylamine into it, and react 1 After 1 hour, the temperature was raised to 85° C. for 2 hours to prepare hexadecylamine-modified epoxy resin. Wherein, the used E-51 is 70 parts by mass, and the modifier hexadecylamine is 5 parts by mass.

[0044] The preparation method of this example polyurethane resin is as follows:

[0045] 1) According to the composition ratio, put hexadecylamine modified epoxy resin and castor oil modified diol in a three-necked flask, vacuum dehydrate at 110°C ...

Embodiment 2

[0049] This example polyurethane resin is made from the following components by mass: 5 parts of hexadecylamine modified epoxy resin, 85 parts of castor oil modified diol (number average molecular weight 2000), 18 parts of IPDI, 15 parts of trimethylol propane diallyl ether.

[0050] The preparation method of the polyurethane resin of this example is basically the same as that of Example 1, except that the materials are added according to the raw material composition of this example.

Embodiment 3

[0052] This example polyurethane resin is made by the component of following mass parts: 5 parts of cetylamine modified epoxy resins, 30 parts of castor oil modified diols (number average molecular weight 1000), 55 parts of castor oil modified diols ( Number average molecular weight 2000), 34 parts of IPDI, 38.9 parts of trimethylolpropane diallyl ether.

[0053] The preparation method of the polyurethane resin of this example is basically the same as that of Example 1, except that the materials are added according to the raw material composition of this example.

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Abstract

The invention discloses a polyurethane resin and its preparation method and application. The polyurethane resin is prepared from the following components by mass: 2 to 10 parts of alkylamine modified epoxy resin, 50 to 90 parts of castor oil modified diol, 10 to 35 parts of isocyanate, 5 to 40 parts Allyl ether. At the same time, the application of the polyurethane resin in the preparation of coatings is also disclosed. The polyurethane resin of the present invention is a solvent-free product, less chemical raw materials are used for preparation, and it is more environmentally friendly. The use of this polyurethane resin to prepare coatings does not require additional solvents during construction, does not generate VOC, and has excellent comprehensiveness. Compared with the current one-component system, the performance of the product of the present invention is better; compared with the two-component system, the product of the present invention can achieve the same high gloss and fullness as the two-component system, regardless of the proportion Accuracy and operating window period can be used for a long time, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a solvent-free polyurethane resin and its preparation method and application. Background technique [0002] With people's growing awareness of environmental protection and the improvement of laws and regulations, the use of solvent-based coatings originally used for light corrosion protection will be greatly hindered. Although water-based coatings are also booming, due to some hydrophilic properties of water-based coatings The existence of the base makes it have a big gap with solvent-based coatings in performance, and if the water-based coatings are not handled properly, they will pollute water sources and soil, causing greater damage. Therefore, it is particularly important to develop high-performance, solvent-free and low-viscosity environmentally friendly resins. [0003] In the prior art, CN106995651A mentions that epoxy resin and thermosetting acrylic resin are used t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/58C09D175/14C08G59/14
CPCC08G18/584C08G18/6705C08G18/675C08G59/1477C09D175/14
Inventor 钟伟杰黄华
Owner 广州昊毅新材料科技股份有限公司