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A kind of comb-shaped structure urethane acrylate and preparation method thereof

The technology of urethane acrylate and isocyanate ethyl acrylate, which is applied in the field of urethane acrylate and its preparation, can solve the problems of unfriendly acrylate reaction process, complicated synthesis method and difficult control of double bond density, etc., and achieves good mutual solubility, The effect of high productivity and high flexibility

Inactive Publication Date: 2020-11-06
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the complex process of the existing dihydroxy acrylate synthesis method, the reaction process needs a solvent, the solvent removal is difficult after the reaction, it is not environmentally friendly and the graft polymerization method is difficult to control the reaction process of the comb-shaped structure polyurethane acrylate. Some linear urethane acrylates terminated with acrylate double bonds at both ends have low double bond density and low hardness after light curing, and a comb-shaped structure urethane acrylate and its preparation method are provided.

Method used

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  • A kind of comb-shaped structure urethane acrylate and preparation method thereof
  • A kind of comb-shaped structure urethane acrylate and preparation method thereof
  • A kind of comb-shaped structure urethane acrylate and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0025] Specific implementation mode 1: This implementation mode is a structure of comb-shaped structure polyurethane acrylate:

[0026] Wherein, the R is The R 1 for -CH 3 , The value range of m is 1-9.

specific Embodiment approach 2

[0027] Specific embodiment two: this embodiment is a method for preparing polyurethane acrylate with a comb structure, which is completed in the following steps:

[0028] 1. Synthesis of a comb-shaped polyurethane acrylate prepolymer with isocyanate groups at both ends:

[0029] Mix dihydroxy acrylate and diisocyanate evenly under a nitrogen atmosphere, then heat up to 40°C-60°C, and then react for 3h-5h in a nitrogen atmosphere at a temperature of 40°C-60°C to obtain isocyanate groups at both ends. Comb structure polyurethane acrylate prepolymer;

[0030] The molar ratio of dihydroxyacrylate and diisocyanate described in step 1 is 1:(1.1~1.5);

[0031] 2. Mix the comb-shaped polyurethane acrylate prepolymer with isocyanate groups at both ends and monohydric alcohol evenly, then raise the temperature to 50°C-80°C, and then react at a temperature of 50°C-80°C for 2h-4h to obtain Comb structure polyurethane acrylate;

[0032] The molar ratio of the comb structure urethane acr...

specific Embodiment approach 3

[0042] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the diisocyanate is one of TDI, MDI, IPDI, HDI, HMDI and HTDI or a mixture of several of them. Other steps are the same as in the second embodiment.

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Abstract

The invention provides polyurethane acrylate with a comb-shaped structure and a preparation method thereof and relates to polyurethane acrylate and preparation methods thereof. The polyurethane acrylate with the comb-shaped structure and the preparation method thereof are used for solving the problems that the existing dihydroxyl acrylate synthesis method is complicated in process, a reaction process needs a solvent, desolventizing is difficult and not environmentally friendly after reaction, a reaction process for preparing the polyurethane acrylate with the comb-shaped structure by a grafting polymerization method is not easy to control, the existing linear polyurethane acrylate with two acrylate double-bond terminated ends is low in double bond density, and the light-cured hardness is low. The polyurethane acrylate with the comb-shaped structure has a structure represented by a formula shown in the description. The method comprises the steps of firstly, synthesizing a comb-shape-structured polyurethane acrylate prepolymer with isocyanate groups at two ends, and then, subjecting the prepolymer to a reaction with monobasic alcohol. According to the polyurethane acrylate with the comb-shaped structure, prepared by the method, the reaction conditions are mild, the yield is high and is 92% to 96%, and the preparation process is easy to control. The invention further provides thepreparation method of the polyurethane acrylate with the comb-shaped structure.

Description

technical field [0001] The invention relates to a polyurethane acrylate and a preparation method thereof. Background technique [0002] As an important light-curing material, urethane acrylate has excellent flexibility, impact resistance, chemical stability and scratch resistance stability. At the same time, polyurethane acrylate also has the advantages of adjustable chemical structure and various types of synthetic raw materials to choose from, making it widely concerned and applied in the fields of light-cured films, adhesives, and 3D printing. [0003] At present, most urethane acrylates have a long chain structure terminated by acrylate double bonds at both ends, or a hyperbranched body structure with acrylate double bonds terminated at the end. Adjusting the material properties by increasing the molecular weight of the urethane acrylate main chain will reduce the double bond density of the resin, resulting in a decrease in the photocuring speed and a decrease in the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/28C08G18/10
CPCC08G18/10C08G18/2815C08G18/675
Inventor 宋彩雨孙明明张斌张绪刚李坚辉王磊薛刚赵明刘彩召李奇力梅格
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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