Multifunctional bio-based urethane acrylate as well as preparation method and application thereof

A polyurethane acrylate and multi-functionality technology, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, applications, etc., can solve the problem that the functionality is difficult to obtain a great degree of improvement, and achieve enhanced acid resistance Alkali resistance and boiling water resistance, the effect of improving pencil hardness and enhancing crosslinking density

Active Publication Date: 2021-02-12
GUANGDONG LANYANG SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main chain of traditional urethane acrylate is generally a linear structure, and the double bonds with polymerization activity are located at both ends of the long chain of the prepolymer, and the middle segment generally does not contain double bonds, so its functionality is difficult to be greatly improved.

Method used

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  • Multifunctional bio-based urethane acrylate as well as preparation method and application thereof
  • Multifunctional bio-based urethane acrylate as well as preparation method and application thereof
  • Multifunctional bio-based urethane acrylate as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of multifunctional bio-based polyurethane acrylate, comprising the steps of:

[0039] (1) Add oleic acid into the reaction kettle, stir and heat up to 60°C, add tertiary ammonium salt catalyst N, N-dimethylethanolamine with 1% by weight of oleic acid, then heat up to 80°C and add dropwise The glycidyl methacrylate of the polymerization agent was reacted for 1.5h, and then heated to 90°C for 4h to obtain oleic acid acrylate, whose infrared spectrum was shown in image 3 , NMR file Figure 4 ; The molar ratio between the carboxylic acid group in the oleic acid and the epoxy group in the glycidyl methacrylate is 1:1.

[0040] (2) Add ricinoleic acid into the reaction kettle, stir and heat up to 60°C, add a tertiary ammonium salt catalyst with 1% weight of ricinoleic acid, then heat up to 80°C and dropwise add methacrylic acid containing 0.5% polymerization inhibitor Glycidyl ester, reacted for 1.5h, and then heated up to 90°C for 4h to obtain ricinol...

Embodiment 2

[0044] A preparation method of multifunctional bio-based urethane acrylate, which is the same as Example 1 except for the following steps: the diisocyanate is TDI, and the isocyanate group and the oleic acid acrylate and ricinoleic acid acrylate , Itaconic acid diacrylate or castor oil contains a molar ratio of hydroxyl groups of 4.9:1:2:1:1.

Embodiment 3

[0046] A preparation method of multifunctional bio-based urethane acrylate, which is the same as in Example 1 except for the following steps: the diisocyanate is MDI, and the isocyanate group and the oleic acid acrylate and ricinoleic acid acrylate , Itaconic acid diacrylate or castor oil contains hydroxyl groups in a molar ratio of 4.9:1:1:2:1.

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Abstract

The invention belongs to the field of UV curing materials, and particularly relates to multifunctional bio-based urethane acrylate as well as a preparation method and the application thereof. The preparation method comprises the following steps: respectively preparing oleic acid acrylate, ricinoleic acid acrylate and itaconic acid diacrylate; slowly dropwise adding a mixture of diisocyanate and acatalyst into the prepared mixture of oleic acid acrylate, ricinoleic acid acrylate, itaconic acid diacrylate and castor oil at 15-35 DEG C, heating to 50-80 DEG C, and stirring to react for 5-8 hours, thereby obtaining the multifunctional bio-based urethane acrylate. Firstly, the synthesis steps of urethane acrylate are reduced to one-step reaction from the original two steps; secondly, double bonds are introduced into a main chain of urethane acrylate, so that the functionality of urethane acrylate is improved to a great extent; and thirdly, the bio-based raw materials are introduced into the urethane acrylate, so that the use of petrochemical resources is reduced.

Description

technical field [0001] The invention belongs to the field of UV curing materials, and in particular relates to a multifunctional bio-based polyurethane acrylate and a preparation method and application thereof. Background technique [0002] UV-curable polyurethane acrylate is an important raw material for UV-curable materials. Its molecular chain contains acrylic functional groups and carbamate bonds. The cured film has high abrasion resistance, adhesion, flexibility and high peel strength of polyurethane. And excellent low temperature resistance and excellent optical performance and weather resistance of polyacrylate, it is a kind of radiation curing material with excellent comprehensive performance. Urethane acrylate is generally prepared by polycondensation reaction of diisocyanate and polyol to prepare prepolymer, and finally prepared by capping with acrylate monomer. Therefore, the polyurethane acrylate molecular chain contains three chemical structural segments, namel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/36C09D175/16C09D11/101C09D11/102C09J175/16B33Y70/00
CPCC08G18/675C08G18/6725C08G18/36C09D175/16C09D11/101C09D11/102C09J175/16B33Y70/00
Inventor 肖亚亮袁腾黄锦清杨卓鸿李小平
Owner GUANGDONG LANYANG SCI & TECH
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