Tung oil polyol base post-crosslinkable amphoteric polyurethane and preparation method thereof

A technology of polyurethane and tung oil, which is applied in the field of ionic polyurethane, tung oil polyol-based amphoteric polyurethane and its preparation, can solve the problems such as the preparation method of amphoteric water-based polyurethane that have not yet been seen, achieve good acid-base reversibility, improve utilization rate, and reduce dependence sexual effect

Inactive Publication Date: 2017-10-27
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are no research reports on amphoteric waterborne polyurethane based on tung oil structure and its preparation method

Method used

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  • Tung oil polyol base post-crosslinkable amphoteric polyurethane and preparation method thereof
  • Tung oil polyol base post-crosslinkable amphoteric polyurethane and preparation method thereof
  • Tung oil polyol base post-crosslinkable amphoteric polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Synthesize tung oil polyol-based amphoteric polyurethane from isocyanate by HMDI

[0037] After fully drying the reaction device, add polyoxyethylene ether (PEG-800) with a molecular weight of 800 to the four-necked bottle, remove water in a vacuum and cool down to room temperature, add 4,4'-dicyclohexyl under nitrogen protection and stirring Methane diisocyanate (HMDI) and heated to 90 ° C, add dimethylol propionic acid (DMPA) to dissolve and cool down, add tung oil polyol (TG-20C) and N-methyldiethanolamine (MDEA), slowly heat up to 90 ℃ reaction 2.5h. When the NCO reaches the theoretical value, cool the product with adjusted viscosity, add acetic acid, add distilled water after 20 minutes of neutralization, stir and mix and discharge the material, so that the amphoteric compound based on tung oil polyol and HMDI with a solid content of 25% can be prepared. Polyurethane.

[0038] The proportioning ratio of the main raw materials is the molar ratio of D...

Embodiment 2

[0039] Embodiment two: change the isocyanate from HMDI to hexamethylene diisocyanate (HDI)

[0040] After fully drying the reaction device, add PEG-800 to the four-neck bottle, remove water in vacuum and cool down to room temperature, add HDI under nitrogen protection and stirring, heat to 90°C under stirring, add DMPA to dissolve and cool down, add TG-20C and MDEA were heated slowly to 90°C for 3.5 hours. After the reaction, cool the product with adjusted viscosity, add acetic acid for neutralization for 20 minutes, add distilled water, stir and mix and discharge the material, so as to obtain an amphoteric polyurethane based on tung oil polyol and HDI with a solid content of 25%.

[0041] The molar ratio of DMPA:MEDA:PEG:HTO:HDI=2:2:4:3:11

Embodiment 3

[0042] Embodiment three: isocyanate is changed into isophorone diisocyanate (IPDI) by HMDI

[0043] After fully drying the reaction device, add PEG-800 to the four-necked bottle, remove water in vacuum and cool down to room temperature, add IPDI under nitrogen protection and stirring and heat to 90°C, add DMPA and stir to dissolve and cool down, then add TG-20C and MDEA, slowly warming up to 85°C for 2.5h. After the reaction is finished, cool the product with adjusted viscosity, add acetic acid to neutralize for 20 minutes, add distilled water, stir and mix and discharge, thus the amphoteric polyurethane based on tung oil polyol and IPDI with a solid content of 25% can be prepared.

[0044] The molar ratio of DMPA:MEDA:PEG:HTO:IPDI=3:3:3:3:12

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Abstract

The invention discloses a tung oil polyol based amphoteric polyurethane capable of additional crosslinking and a preparation method thereof, and belongs to the technical field of polymer. According to the method, raw materials containing tung oil polyol or hydroxylated tung oil, N-methyl diethanol amine, dimethylolpropionic acid, polyethylene glycol and 4,4'-dicyclohexylmethylmethane or isophorone diisocyanate under certain conditions are prepared into an amphoteric polyurethane water dispersion containing both hydrophilic and lipophilic structural units and conjugated double bonds by controlling the reaction conditions, so as to form the amphoteric polyurethane material capable of additional crosslinking. Compared with the ordinary amphoteric polyurethane, the amphoteric polyurethane water dispersion containing tung oil conjugated double bonds can stably exist in acidic and alkaline media, and the formed film also has excellent water resistance and solvent resistance, and the mechanical properties of the formed film enhance with the increase of crosslinking density and can be regulated by changing the degree of crosslinking.

Description

technical field [0001] The invention relates to ionic polyurethane, in particular to tung oil polyol-based amphoteric polyurethane and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] The modern polymer material industry, including polyurethane, is developed on the basis of the petrochemical industry. To date, almost all polymers are derived from petrochemicals, and the vast majority of materials are not biodegradable. Therefore, seeking efficient, cheap, renewable and sustainable new resources, as well as exploring and researching environmentally friendly green materials, must become an important topic for human survival and development and to solve environmental pollution. [0003] Polyurethane is a kind of multi-block polymer composed of soft and hard segments with excellent comprehensive performance and strong hydrogen bond effect. It is widely used in various fields of industry, agriculture and daily life, and has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/34C08G18/32
CPCC08G18/3275C08G18/348C08G18/36C08G18/4833C08G18/6696
Inventor 任志勇刘璐王华芬张普玉付阳姜垒任百霞肖汉雄
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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