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 proper

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] A self-repairing, vegetable oil-based polyurethane material and its preparation method and application, preparation step recyclable as: (1) add vegetable oil to the reaction vessel, the diisocyanate, diol and catalyst, vegetable oil with a diisocyanate in a molar ratio of 1 : (1-10), the molar ratio of diol to diisocyanate of 1: (1 to 10), the catalyst was added in an amount of 0.02 to 2% by total weight of the reaction mass, stirred uniformly and heated to 20 ~ 100 ℃ reaction 1 ~ 10h, vegetable oil-based polyurethane to give an intermediate product; (2) was added to the reaction vessel N, N'- di-tert-ethylenediamine, N, N'- di-tert-diisocyanate and ethylenediamine molar ratio is 1: (0.5 to 4), warmed to 0 ~ 100 ℃ 0.5 ~ 3H reaction, to give a polyurethane resin-based vegetable oil; (3) the resin obtained hot-pressed, pressing temperature is 40 ~ 100 ℃, pressure applied 0.5 ~ 20MPa, pressing time is 5 ~ 60min, to obtain a vegetable oil-based polyurethane material.

[0023] P...

Example Embodiment

[0028] Example 1

[0029] (1) was added castor oil in the reactor, isophorone diisocyanate (molar ratio of isophorone diisocyanate and castor oil of 3: 1) and the catalyst dibutyl tin (catalyst was added in an amount of the reaction mass of the total 0.5% by weight), stir the reaction was heated to 50 deg.] C 2h, castor oil-based polyurethanes to give intermediate the CTI;

[0030] (2) was added to the reaction vessel N, N'- di-t-butyl ethylenediamine (N, N'- di-tert-ethylenediamine and the molar ratio of isophorone diisocyanate to 1: 2), the reaction was heated to 20 ℃ 0.5h, the resulting product is then hot-pressed (pressing temperature of 60 ℃, 10 MPa or pressure applied, pressing time 10min) to give castor oil-based polyurethane material HUB1.

Example Embodiment

[0031] Example 2

[0032] (1) castor oil was added to the reaction vessel, isophorone diisocyanate (molar ratio of isophorone diisocyanate and castor oil 4: 1), tetraethylene glycol (glycofurol and iso the molar ratio of isophorone diisocyanate was 1: 8) and the catalyst dibutyl tin (amount of catalyst is 0.5% of the total weight of the reaction mass), stir and heated to 50 deg.] C the reaction 2h, to give an intermediate of castor oil based polyurethane the CTI2 product;

[0033] (2) was added to the reaction vessel N, N'- di-t-butyl ethylenediamine (N, N'- di-tert-ethylenediamine and the molar ratio of isophorone diisocyanate to 1: 2), the reaction was heated to 20 ℃ 0.5h, the resulting product is then hot-pressed (pressing temperature of 60 ℃, 10 MPa or pressure applied, pressing time 10min) to give 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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