High light transmittance, super tough, heat/solvent responsive repair polyurethane and preparation method thereof

A technology with high light transmittance and solvent response, applied in the field of self-healing materials, can solve the problems that it is difficult to take into account the mechanical properties and self-healing effects, it is difficult for self-healing materials to achieve self-healing at room temperature, and the practical application and promotion are limited. Good water vapor adsorption resistance, excellent self-healing ability, and stable repeatability

Active Publication Date: 2022-05-27
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, self-healing materials based on reversible covalent bonds are difficult to achieve room temperature self-healing, and there is often a balance between their mechanical properties (modulus and toughness) and dynamic self-healing properties, and it is difficult to balance their mechanical properties and The self-healing effect greatly limits the practical application and promotion of such materials

Method used

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  • High light transmittance, super tough, heat/solvent responsive repair polyurethane and preparation method thereof
  • High light transmittance, super tough, heat/solvent responsive repair polyurethane and preparation method thereof
  • High light transmittance, super tough, heat/solvent responsive repair polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of high light transmittance super strong super tough heat / solvent responsive repair polyurethane, the specific steps are as follows:

[0051] a. Under an inert gas atmosphere, dissolve 6.900 g of toluene diisocyanate-terminated polypropylene glycol (molecular weight: 2300) and 1.000 g of isophorone diisocyanate in 20 mL of N,N'-dimethylformamide solvent to prepare Mixed solution I;

[0052] b. Dissolve 1.280 g of isophorone diamine in 10 mL of N,N'-dimethylformamide solvent to prepare mixed solution II, and then add mixed solution II dropwise to step a at 0-4°C In the obtained mixed solution I, the dropping rate was 1000 μL / min, and the reaction was stirred for 9 to 12 h to obtain the initial product solution III, in which the sum of the molar amounts of toluene diisocyanate-terminated polypropylene glycol and isophorone diisocyanate and isofluoride The molar ratio of ketone diamine is 100:100;

[0053] c. heating the initial reaction product so...

Embodiment 2

[0057] The preparation method of high light transmittance super strong super tough heat / solvent responsive repair polyurethane, the specific steps are as follows:

[0058] a. Under an inert gas atmosphere, dissolve 6.900 g of toluene diisocyanate-terminated polypropylene glycol (molecular weight: 2300) and 1.556 g of isophorone diisocyanate in 20 mL of N,N'-dimethylformamide solvent to prepare Mixed solution I;

[0059] b. Dissolve 1.703 g of isophorone diamine in 10 mL of N,N'-dimethylformamide solvent to prepare mixed solution II, and then add mixed solution II dropwise to step a at 0-4°C In the obtained mixed solution I, the dropping rate was 1000 μL / min, and the reaction was stirred for 9 to 12 h to obtain the initial product solution III, in which the sum of the molar amounts of toluene diisocyanate-terminated polypropylene glycol and isophorone diisocyanate and isofluoride The molar ratio of ketone diamine is 100:100;

[0060] c. heating the initial reaction product so...

Embodiment 3

[0064] The preparation method of high light transmittance super strong super tough heat / solvent responsive repair polyurethane, the specific steps are as follows:

[0065] a. Under an inert gas atmosphere, dissolve 6.900 g of toluene diisocyanate-terminated polypropylene glycol (molecular weight: 2300) and 0.667 g of isophorone diisocyanate in 20 mL of N,N'-dimethylformamide solvent to prepare Mixed solution I;

[0066] b. Dissolve 1.022 g of isophorone diamine in 10 mL of N,N'-dimethylformamide solvent to prepare mixed solution II, and then add mixed solution II dropwise to step a at 0 to 4°C In the obtained mixed solution I, the dropping rate was 1000 μL / min, and the reaction was stirred for 9 to 12 h to obtain the initial product solution III, in which the sum of the molar amounts of toluene diisocyanate-terminated polypropylene glycol and isophorone diisocyanate and isofluoride The molar ratio of ketone diamine is 100:100;

[0067] c. heating the initial reaction product...

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Abstract

The invention discloses a high-transmittance super-strength and super-tough heat / solvent response repair polyurethane and a preparation method thereof. The heat / solvent responsive repairing polyurethane has a structural formula of 10≤n≤60, and is formed by polycondensation of isophorone diamine, toluene diisocyanate-terminated polypropylene glycol, isophorone diisocyanate and small molecule monohydric alcohol. The heat / solvent responsive repair polyurethane of the present invention can complete the repair process at room temperature or at 140°C with solvent assistance, and has high transparency and ultra-high toughness, up to 503MJ / m 3 , and the ability of rapid recovery, it can be stretched to 30 times its original length.

Description

technical field [0001] The invention belongs to the technical field of self-healing materials, and relates to a high-light transmittance, super-strong, super-tough heat / solvent responsive repairing polyurethane and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane is widely used in industrial production, such as elastomers, plastics, fibers, due to its high strength, high toughness, fatigue resistance, high stability, and simple and environmentally friendly processing. Adhesives, coatings, food, medical and other industries. The wide range of application scenarios of thermoplastic polyurethane materials stems from the tunability of their strength and toughness. At present, the common method in the industry is to use different types of polyurethane materials to blend to achieve changes in their hardness and ductility, such as Using the blending of polyether polyurethane and polyester polyurethane, and combining the advantages of soft and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32C08G18/28
CPCC08G18/7614C08G18/755C08G18/724C08G18/6685C08G18/4825C08G18/282C08G18/3234
Inventor 傅佳骏王东任尚阳
Owner NANJING UNIV OF SCI & TECH
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