Preparation method of bio-based self-repairing polyurethane elastomer

A technology of polyurethane elastomer and polyurethane prepolymer is applied in the field of preparation of bio-based self-healing polyurethane elastomer, which can solve the problems of inability to further use, damage of polyurethane, non-renewable, etc., and achieve good self-healing performance and mild preparation process conditions. , the effect of low price
CN112979919APending Publication Date: 2021-06-18INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Publication Date
2021-06-18

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Abstract

The invention provides a preparation method of a bio-based self-repairing polyurethane elastomer. The method comprises the following steps: taking furfuryl amine and vanillin as main raw materials to obtain a micromolecular chain extender, carrying out chain extension reaction on the micromolecular chain extender and a polyurethane prepolymer prepared from diphenylmethane diisocyanate and polypropylene glycol, carrying out vacuum defoaming, pouring into a polytetrafluoroethylene mold, and curing to finally obtain the bio-based polyurethane elastomer with the self-repairing function. According to the invention, the chain extender with the imine dynamic covalent bond are environmentally friendly in raw materials, and wide in raw material source, and is introduced into a polyurethane structure through molecular design to endow an elastomer with excellent self-repairing performance and mechanical performance, wherein the self-repairing efficiency at 60 DEG C can reach 87%, and the elongation at break is 220%.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a bio-based self-repairing polyurethane elastomer. Background technique

[0002] Invented in 1930, polyurethane is widely used in all aspects of life, such as decoration, automobiles, clothes, shoes, elastomers, coatings, walls, roof partitions, bridges and pipeline transportation, etc. It plays a very important role in modern social life role. In 2016, my country's annual output of polyurethane reached 14 million tons, ranking sixth among all polymers. The main raw materials for preparing polyurethane are isocyanate, polyol and chain extender. Compared with non-renewable petroleum-based raw materials, biomass, as a renewable resource, occupies an important position in maintaining the ecological balance of the earth and ensuring the sustainable development of human society. Especially in recent decades, with the rapid development o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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