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Self-repairing and recoverable vegetable oil-based polyurethane material as well as preparation method and application thereof

A polyurethane material and vegetable oil-based technology, applied in the field of polyurethane materials, can solve the problems of irreparable and reprocessed mechanical properties, and achieve the effects of excellent recycling performance, excellent self-repair and simple process

Inactive Publication Date: 2021-12-03
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved: In order to overcome the defects that the existing vegetable oil-based polyurethane materials cannot be repaired and reprocessed and the mechanical properties are generally low, the present invention provides a preparation method of a vegetable oil-based polyurethane material with excellent mechanical properties, which can be repaired and reprocessed

Method used

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  • Self-repairing and recoverable vegetable oil-based polyurethane material as well as preparation method and application thereof
  • Self-repairing and recoverable vegetable oil-based polyurethane material as well as preparation method and application thereof
  • Self-repairing and recoverable vegetable oil-based polyurethane material as well as preparation method and application thereof

Examples

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preparation example Construction

[0022] A self-repairing, recyclable vegetable oil-based polyurethane material and its preparation method and application, the preparation steps are: (1) adding vegetable oil, diisocyanate, diol and catalyst into a reactor, the molar ratio of vegetable oil to diisocyanate being 1 : (1~10), the molar ratio of dibasic alcohol and diisocyanate is 1:(1~10), the catalyst addition is 0.02~2% of the total weight of the reaction material, stirs and heats to 20~100 ℃ reaction 1 ~10h to obtain vegetable oil-based polyurethane intermediate product; (2) Add N,N'-di-tert-butylethylenediamine to the above reactor, the molar ratio of N,N'-di-tert-butylethylenediamine to diisocyanate 1: (0.5~4), heated to 0~100°C for 0.5~3h to obtain vegetable oil-based polyurethane resin; 0.5-20MPa, hot-pressing time 5-60min, to obtain vegetable oil-based polyurethane material.

[0023] Preferably, the vegetable oil described in step (1) is castor oil, tung oil, linseed oil, rubber seed oil, dehydrated casto...

Embodiment 1

[0029] (1) Add castor oil, isophorone diisocyanate (the mol ratio of isophorone diisocyanate and castor oil is 3:1) and catalyzer dibutyltin dilaurate in reactor (catalyst addition is total reaction mass 0.5% of the weight), heated to 50°C for 2h after stirring evenly, to obtain the castor oil-based polyurethane intermediate product CTI;

[0030] (2) Add N,N'-di-tert-butylethylenediamine (the molar ratio of N,N'-di-tert-butylethylenediamine to isophorone diisocyanate is 1:2) into the above reactor, Heating to 20°C for 0.5h, and then subjecting the obtained product to hot pressing (hot pressing temperature 60°C, applied pressure 10MPa, hot pressing time 10min) to obtain castor oil-based polyurethane material HUB1.

Embodiment 2

[0032] (1) Add castor oil, isophorone diisocyanate (the molar ratio of isophorone diisocyanate and castor oil is 4:1), tetraethylene glycol (tetraethylene glycol and isophorone The molar ratio of phorone diisocyanate is 1:8) and the catalyst dibutyltin dilaurate (the amount of the catalyst added is 0.5% of the total weight of the reaction material), stir evenly and heat to 50°C for 2h to obtain castor oil-based polyurethane intermediate Product CTI2;

[0033] (2) Add N,N'-di-tert-butylethylenediamine (the molar ratio of N,N'-di-tert-butylethylenediamine to isophorone diisocyanate is 1:2) into the above reactor, Heated to 20°C for 0.5h, and then subjected to hot pressing (hot pressing temperature 60°C, applied pressure 10MPa, hot pressing time 10min) to obtain castor oil-based polyurethane material HUB2.

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Abstract

The invention discloses a self-repairing and recoverable vegetable oil-based polyurethane material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, enabling vegetable oil, dihydric alcohol and diisocyanate to react under the action of a catalyst to obtain a vegetable oil-based polyurethane intermediate product; then adding N,N'-di-tert-butyl ethylenediamine into the synthesized intermediate product to obtain vegetable oil-based polyurethane resin; and carrying out hot pressing treatment to obtain the vegetable oil-based polyurethane material. The plant oil-based polyurethane material has excellent mechanical property, thermal property, adhesion property, self-repairing property and recycling property, and can be used for reversible cross-linking agents, conductive composite materials and the like. The preparation method is simple and environment-friendly in process, and the raw materials are partially from renewable resources, so that the preparation method has great significance in promoting the sustainable development of the polyurethane material industry.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a self-repairing and recyclable vegetable oil-based polyurethane material and its preparation method and application. Background technique [0002] Biomass resources have the advantages of natural regeneration, wide sources, low price, and biodegradability, so they have received widespread attention and attention. It is generally believed that effective use of them can solve or alleviate the depletion of fossil resources and the environmental impact major issues such as pollution. As a natural and renewable resource, castor oil is a good candidate for the preparation of polyurethane polymers due to its unique hydroxyl structure. The long flexible fatty acid chain present in castor oil endows the obtained material with good flexibility, while the unique hydroxyl group can undergo polycondensation reaction with polyfunctional isocyanate to form hard segments, thus...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/67C08G18/32C08G18/48C08G18/66C09J175/14C08L75/14
CPCC08G18/12C08G18/36C08G18/3206C08G18/4833C08G18/4854C08G18/6685C09J175/14C08L75/14C08L2201/04C08G2170/00C08G18/3228
Inventor 刘承果张金帅周永红尚倩倩胡云胡立红朱国强余希希黄佳
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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