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Castor oil-based hydrophilic chain extender as well as preparation method and application thereof

A hydrophilic chain extender, castor oil-based technology, applied in the direction of sulfide preparation, organic chemistry, etc., to achieve the effect of fast reaction speed, large contact area and uniform mixing

Active Publication Date: 2018-01-09
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are few patents on the preparation of new hydrophilic chain extenders, and there are no renewable materials as the matrix. For example, the Chinese invention patent with the publication number CN104356330A has invented a carboxylic acid type water-based polyurethane chain extender and its preparation method. The Chinese invention patent No. CN106046288A invented a hydrophilic chain extender and its preparation method and application. Although the above two invention patents have successfully prepared chain extenders with better performance and are expected to replace traditional chain extenders, they are both Based on petroleum-based materials

Method used

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  • Castor oil-based hydrophilic chain extender as well as preparation method and application thereof
  • Castor oil-based hydrophilic chain extender as well as preparation method and application thereof
  • Castor oil-based hydrophilic chain extender as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Add metered photoinitiator 1173, castor oil and mercaptoethanol in the test tube in turn (the molar ratio of double bond to mercaptogroup is 1:4.5; the amount of photoinitiator is (oil quality+mercaptoethanol quality)×2%) , reacted under magnetic stirring and ultraviolet light for 4.5h. Using ethyl acetate as a solvent, wash the reaction product with brine for 5 times, discard the water phase, remove water with anhydrous magnesium sulfate, filter with suction, and rotary evaporate to obtain a light yellow viscous liquid castor oil-based polyol CO-SH, the first step The reaction is over.

[0060] (2) Put the intermediate product prepared in step (1) into an oven at 60°C and bake for 12 hours. Take an appropriate amount of the intermediate product CO-SH in a one-necked bottle, add an appropriate amount of NaOH (the molar ratio of ester group to NaOH is 1:2) under magnetic stirring at 80°C, react for 5 hours, and add HCl to adjust the reaction system to acidity. Usin...

Embodiment 2

[0066] (1) Add metered photoinitiator 1173, castor oil and thioglycerol in sequence in the test tube (the molar ratio of double bond to mercapto group is 1:4.5; the amount of photoinitiator is (oil quality+thioglycerol quality)×2 %), reacted for 4.5h under magnetic stirring and ultraviolet light. Using ethyl acetate as a solvent, wash the reaction product with brine for 5 times, discard the water phase, remove water with anhydrous magnesium sulfate, filter with suction, and rotary evaporate to obtain a light yellow viscous liquid castor oil-based polyol CO-TG, the first step The reaction is over.

[0067] (2) Put the intermediate product prepared in step (1) into an oven at 60°C and bake for 12 hours. Take an appropriate amount of the intermediate product CO-TG in a one-necked bottle, add an appropriate amount of NaOH (the molar ratio of ester group to NaOH is 1:2) under magnetic stirring at 80°C, react for 5 hours, and add HCl to adjust the reaction system to acidity. Using...

Embodiment 3

[0071] (1) Add metered photoinitiator 1173, castor oil and mercaptoethanol in the test tube in turn (the molar ratio of double bond to mercaptogroup is 1:1.5; the amount of photoinitiator is (oil quality+mercaptoethanol quality)×2%) , Reacted under magnetic stirring and ultraviolet light for 5h. Use ethyl acetate as a solvent, wash the reaction product with brine three times, discard the water phase, remove water with anhydrous magnesium sulfate, filter with suction, and rotary evaporate to obtain a light yellow viscous liquid castor oil-based polyol CO-SH, the first step The reaction is over.

[0072] (2) Take an appropriate amount of the intermediate product CO-SH prepared in step (1) in a single-necked bottle, add an appropriate amount of NaOH (the molar ratio of ester group to NaOH is 1:1) under magnetic stirring at 60 ° C, react for 1 h, add HCl to dissolve The reaction system was adjusted to acidity. Using ethyl acetate as a solvent, wash the reaction product with brin...

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Abstract

The invention discloses a castor oil-based hydrophilic chain extender as well as a preparation method and application thereof. According to the castor oil-based hydrophilic chain extender, starting from castor oil, one of the renewable resources, a hydroxyl group is introduced by mercapto group-ene light click reaction to obtain an intermediate, and then a carboxyl group is generated through hydrolysis reaction of an ester group (or ricinoleic acid is generated through ester hydrolysis reaction of castor oil first, and then the hydroxyl group is introduced by mercapto group-ene light click reaction), the hydrophilic chain extender containing at least two hydroxyl groups and a carboxyl group is prepared, and the hydrophilic chain extender is applied to preparation of anionic aqueous polyurethane emulsion. According to the castor oil-based hydrophilic chain extender as well as the preparation method and the application thereof, the castor oil is applied to hydrophilic chain extender rawmaterials, has positive reference value for broadening application and increasing added value of natural fat products and also plays a positive role in reducing or replacing an environment problem caused by the use of petroleum non-renewable resources. The castor oil-based hydrophilic chain extender prepared by the invention is liquid at normal temperature, a contact area with other raw materialsduring a reaction is larger, the mixing is more uniform and the reaction speed is higher.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a castor oil-based hydrophilic chain extender and its preparation method and application. Background technique [0002] Due to its excellent performance, polyurethane is widely used in many fields of national economy, such as coatings, foams, adhesives and so on. Solvent-based polyurethane produces a large amount of VOC during use, including toluene and butanone, which cause great harm to the environment and construction personnel. Therefore, it is imperative to develop water-based polyurethane emulsion. Waterborne polyurethane is generally prepared from polyols, isocyanates, and hydrophilic chain extenders. There are many types of polyols and isocyanates, but there are only two hydrophilic chain extenders, which are one of the key monomers for the preparation of waterborne polyurethane emulsions. Methylolbutyric acid (DMBA), 2,2-dimethylolpropionic acid (DMPA), etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/44C08G18/68C08G18/67C08G18/34C07C319/20C07C319/18C07C323/52
Inventor 张超群梁海燕陆镜一
Owner SOUTH CHINA AGRI UNIV
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