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Siloxane chain segment-containing trifunctional polyurethane acrylate and preparation method thereof

A polyurethane acrylate, trifunctional technology, applied in the field of polyurethane acrylate and its preparation, can solve the problems of poor flexibility and elongation, poor weather resistance, slow photocuring speed of silicone polyurethane acrylate, etc., and achieve mutual solubility Good, excellent shear resistance, good chemical stability effect

Inactive Publication Date: 2018-02-16
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 problems of poor weather resistance, poor flexibility and elongation and slow photocuring speed of silicone urethane acrylate in the existing urethane acrylate, and provide a trifunctional polyurethane containing siloxane chain segment Acrylic ester and its preparation method

Method used

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  • Siloxane chain segment-containing trifunctional polyurethane acrylate and preparation method thereof
  • Siloxane chain segment-containing trifunctional polyurethane acrylate and preparation method thereof
  • Siloxane chain segment-containing trifunctional polyurethane acrylate and preparation method thereof

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specific Embodiment approach 1

[0027] Specific implementation mode 1: This implementation mode is a structural formula of a trifunctional polyurethane acrylate containing a siloxane segment:

[0028] where R is The value range of n in is 1~4; The said R 1 for The R 2 for The value range of a is 6~20, The range of b in b is 2 to 35; the R 3 for

specific Embodiment approach 2

[0029] Specific implementation mode two: This implementation mode is a preparation method of trifunctional polyurethane acrylate containing siloxane segment, which is specifically completed according to the following steps:

[0030] 1. Synthesis of siloxane-containing segmented polyurethane prepolymer I with isocyanate groups at both ends:

[0031] Mix the hydroxy-terminated siloxane oligomer and diisocyanate evenly, then raise the temperature to 40°C-60°C, and then react at a temperature of 40°C-60°C for 3h-5h to obtain a silicon-oxygen compound with isocyanate groups at both ends. Alkane segment polyurethane prepolymer Ⅰ;

[0032] The molar ratio of the hydroxyl-terminated siloxane oligomer and diisocyanate described in step 1 is 1:(2~2.3);

[0033] 2. Synthesis of siloxane-containing segmented polyurethane prepolymer II with an isocyanate group at one end:

[0034] Mix the hydroxyl acrylate with the siloxane segmented polyurethane prepolymer I with isocyanate groups at bo...

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the hydroxyl-terminated siloxane oligomer described in step 1 is a mixture of one or both of hydroxyl silicone oil and hydroxypropyl silicone oil; The molar mass of the hydroxy silicone oil is 400g / mol˜5000g / mol; the molar mass of the hydroxypropyl silicone oil is 1000g / mol˜3000g / mol. Other steps are the same as in the second embodiment.

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Abstract

The invention discloses siloxane chain segment-containing trifunctional polyurethane acrylate and a preparation method thereof, relates to polyurethane acrylate and a preparation method thereof, and aims to solve the problems that the existing polyurethane acrylate is poor weather resistance, flexibility and elongation and the existing organosilicone polyurethane acrylate is low in light curing speed. The preparation method of the siloxane chain segment-containing trifunctional polyurethane acrylate comprises the following steps: 1, synthesizing a siloxane chain segment-containing polyurethaneprepolymer I with isocyanate groups at the two ends; 2, synthesizing a siloxane chain segment-containing polyurethane prepolymer II with an isocyanate group at one end; 3, uniformly mixing trihydricalcohol and the siloxane chain segment-containing polyurethane prepolymer II with the isocyanate group at one end, and reacting for 1-3h. The siloxane chain segment-containing trifunctional polyurethane acrylate prepared by the preparation method provided by the invention has excellent mechanical properties after light curing treatment. The preparation method of the siloxane chain segment-containing trifunctional polyurethane acrylate can be obtained.

Description

technical field [0001] The invention relates to a polyurethane acrylate and a preparation method thereof. Background technique [0002] The urethane group in the urethane acrylate oligomer structure has high activity and strong polarity, and is excellent for various materials such as rubber, metal, fabric, leather, paper, wood, ceramics, glass, plastic, etc. adhesive properties. Hydrogen bonds can be formed between polyurethane macromolecular chains or with the adherend, and the molecular cohesion is strong, making the bonding strength higher, showing excellent flexibility, impact resistance and scratch stability. Under the action of a photoinitiator, the acrylate functional group is rapidly cured by ultraviolet light, which makes this type of oligomer have outstanding application performance in the field of ultraviolet light curing. [0003] Due to its unique Si-O-Si main chain structure, siloxane oligomers exhibit high and low temperature resistance, excellent chemical s...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/66C08G18/61C08G18/42C08G18/32C08G18/10
CPCC08G18/10C08G18/4277C08G18/61C08G18/73C08G18/755C08G18/7614C08G18/7671C08G18/672C08G18/42C08G18/3206
Inventor 宋彩雨孙明明薛刚张斌张绪刚李坚辉王磊赵明刘彩召李奇力梅格徐博杨艳晶
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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