Self-repairing acrylate polyurethane material and synthesis method thereof

A polyurethane material and acrylate technology are applied in the field of self-healing acrylate polyurethane materials and their synthesis, achieving the effects of high self-repairing efficiency, high toughness value and high synthesis yield

Pending Publication Date: 2021-10-01
江苏富琪森新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] But how to prepare a kind of acrylate polyurethane with good self-healing ability and strong mechanical properties, there is no prior art that can be used for reference at present; It has good performance in terms of repair efficiency and has become a technical problem to be solved urgently.

Method used

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  • Self-repairing acrylate polyurethane material and synthesis method thereof
  • Self-repairing acrylate polyurethane material and synthesis method thereof
  • Self-repairing acrylate polyurethane material and synthesis method thereof

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preparation example Construction

[0046] In the present invention, the preparation method of the polyacrylate comprises the following steps:

[0047] Mix butyl acrylate and hydroxypropyl methacrylate in a solvent, add an initiator and react to obtain it.

[0048] In the present invention, the reaction of butyl acrylate and hydroxypropyl methacrylate is carried out under the protection of an inert gas, and the inert gas is nitrogen.

[0049] In the present invention, the solvent is preferably N,N-dimethylacetamide, and the initiator is preferably N,N-azobisisobutyronitrile.

[0050]In the present invention, the molar volume ratio of butyl acrylate, hydroxypropyl methacrylate and solvent is 0.5-1.2mol: 0.5-1.5mol: 10-12mL, preferably 0.8-1.0mol: 0.8-1.4mol: 11 mL, more preferably 1 mol: 1 mol: 11 mL.

[0051] In the present invention, the content of the initiator is 1-1.5%, preferably 1.2-1.4%, and more preferably 1.3%, of the total mass of the reactants in the system.

[0052] The invention provides a kind o...

Embodiment 1

[0070] (1) Take 2.16g of hydroxypropyl methacrylate with a molecular weight of 144.17g / mol and place it in a reaction kettle, add 11ml of N,N-dimethylacetamide, and add 1.92g of butyl acrylate and 0.1g of azo Diisobutyronitrile, the reaction system was fully reacted at 70°C for 2 hours under the protection of nitrogen, and the product of colorless and transparent liquid was polyacrylate.

[0071] (2) Take 5 g of polytetrahydrofuran with a molecular weight of about 1000 in the reaction kettle, pass nitrogen into the reaction kettle for 10 minutes, place the reaction kettle at 120 ° C for 2 hours in vacuum, completely remove the moisture in the reaction kettle, and put it under the protection of nitrogen , add 2.63g of dicyclohexylmethane 4,4'-diisocyanate and 0.04g of catalyst dibutyltin dilaurate into the reaction system, and react the reaction system at 70°C for 1 hour to obtain an isocyanate-terminated prepolymer.

[0072] (3) Dissolve 0.77g of chain extender 2,2'-dithiodiet...

Embodiment 2

[0075] (1) Take 2.16g of hydroxypropyl methacrylate with a molecular weight of 144.17g / mol and place it in a reaction kettle, add 11ml of N,N-dimethylacetamide, and add 1.92g of butyl acrylate and 0.1g of azo Diisobutyronitrile, the reaction system was fully reacted at 70°C for 2 hours under the protection of nitrogen, and the product of colorless and transparent liquid was polyacrylate.

[0076] (2) Take 5 g of polytetrahydrofuran with a molecular weight of about 1000 in the reaction kettle, pass nitrogen into the reaction kettle for 10 minutes, place the reaction kettle at 120 ° C for 2 hours in vacuum, completely remove the moisture in the reaction kettle, and put it under the protection of nitrogen , add 2.63g of dicyclohexylmethane 4,4'-diisocyanate and 0.04g of catalyst dibutyltin dilaurate into the reaction system, and react the reaction system at 70°C for 1 hour to obtain an isocyanate-terminated prepolymer.

[0077] (3) 1.54g of chain extender 2,2'-dithiodiethanol and...

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Abstract

The invention provides a self-repairing acrylate polyurethane material and a synthesis method thereof, and belongs to the technical field of high polymer materials. The molecular structure of the obtained self-repairing acrylate polyurethane material comprises a hard segment, a soft segment and a cross-linked structure, wherein the hard segment is a copolymer of dicyclohexylmethane 4, 4'-diisocyanate and 2, 2'-dithiodiethanol, the soft segment is polytetrahydrofuran, and the cross-linked structure is polyacrylate. According to the invention, polyurethane containing 2-hydroxyethyl disulfide as a functional group and hydroxyl-containing acrylate are subjected to cross-linking curing to synthesize the self-repairing acrylate polyurethane with high self-repairing efficiency, strong toughness and transparency. The self-repairing of the material is realized based on the exchange reaction of dynamic disulfide bonds and hydrogen bonds, a cross-linked network is provided by taking polyacrylate as a cross-linking agent, and the obtained material has excellent mechanical properties, higher Young modulus and obdurability, and meanwhile, the material has the properties of good transparency, higher self-repairing efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a self-repairing acrylate polyurethane material and a synthesis method thereof. Background technique [0002] Inspired by the ability of biological self-healing, scientists have developed a new type of self-healing material. When the material is damaged, it can achieve self-healing at the molecular level, so that the damage of the material can be repaired, thereby prolonging the service life of the material and improving It improves the durability of the product and has high research and application value. [0003] Self-healing materials can be divided into two types according to their repair mechanism, foreign aid self-healing and intrinsic self-healing. The self-healing system of foreign aid uses microcapsules, microspheres, microvessels and other structures as carriers. When the material is damaged, the cross-linking agent, initiator and functional molecules wrapped...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/40C08G18/48C08G18/62C08G18/66C08G18/38
CPCC08G18/4063C08G18/4854C08G18/6666C08G18/6229C08G18/10C08G18/3876
Inventor 邓煜东闫磊
Owner 江苏富琪森新材料有限公司
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