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Method for preparing waterborne polyurethane using vegetable oil based cardanol as raw material

A water-based polyurethane and vegetable oil-based technology, which is applied in the field of preparing water-based polyurethane, can solve the problems of polluting the environment and endangering human health, and achieves the effects of good dispersion stability, easy operation, and good water resistance

Inactive Publication Date: 2016-11-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional polyurethane uses organic substances as solvents, and the products often contain organic volatile substances, which pollute the environment and endanger people's health

Method used

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  • Method for preparing waterborne polyurethane using vegetable oil based cardanol as raw material
  • Method for preparing waterborne polyurethane using vegetable oil based cardanol as raw material
  • Method for preparing waterborne polyurethane using vegetable oil based cardanol as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Follow the steps below to prepare cardanol-based waterborne polyurethane:

[0024] (1) Add 100g (0.33mol) of cardanol and 0.1g of zinc chloride into a 100mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, heat to 95°C, and add 46g (0.5mol) dropwise within 30 minutes Epichlorohydrin, react for 2~3h; add 16g (0.4mol) sodium hydroxide dropwise within 40min, raise the temperature to 100°C and react for 2h, transfer the above product to a separatory funnel, wash with water until neutral, separate the organic layer and dry Filtrate, and rotate the resulting filtrate at 90°C and -0.1MPa to remove excess epichlorohydrin to obtain cardanol glycidyl ether.

[0025] (2) Add 40g of cardanol glycidyl ether and 9g of sulfuric acid into a 250mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, raise the temperature to 100°C, react for 12h, cool to room temperature, wash with water until neutral, separate...

Embodiment 2

[0029] Follow the steps below to prepare cardanol-based waterborne polyurethane:

[0030] (1) Add 100g (0.33mol) cardanol and 0.12g zinc chloride to a 100mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, heat to 100°C, and add 50.6g (0.55mol) dropwise within 30 minutes ) epichlorohydrin, react for 2~3h; add 16.8g (0.42mol) sodium hydroxide dropwise within 40min, raise the temperature to 100°C for 2h, transfer the above product to a separatory funnel, wash with water until neutral, and separate the organic layer drying and filtering, and the resulting filtrate was vacuum rotary evaporated to remove excess epichlorohydrin to obtain cardanol glycidyl ether.

[0031] (2) Add 40g of cardanol glycidyl ether and 10g of sulfuric acid into a 250mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, raise the temperature to 105°C, react for 13h, cool to room temperature, wash with water until neutral, separ...

Embodiment 3

[0035] Follow the steps below to prepare cardanol-based waterborne polyurethane:

[0036] (1) Add 100g (0.33mol) of cardanol and 0.13g of zinc chloride into a 100mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, heat to 100°C, and add 55.5g (0.6mol) of ) epichlorohydrin, react for 2~3h; add 19.6g (0.49mol) sodium hydroxide dropwise within 40min, raise the temperature to 100°C for 2h, transfer the above product to a separatory funnel, wash with water until neutral, and separate the organic layer drying and filtering, and the resulting filtrate was vacuum rotary evaporated to remove excess epichlorohydrin to obtain cardanol glycidyl ether.

[0037](2) Add 40g of cardanol glycidyl ether and 8g of sulfuric acid into a 250mL three-neck flask equipped with a condenser, an electric stirrer and filled with nitrogen, raise the temperature to 105°C, react for 13h, cool to room temperature, wash with water until neutral, separate Add anhydrous ...

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Abstract

The invention provides a method for preparing waterborne polyurethane using vegetable oil based cardanol as a raw material, and belongs to the field of preparation of waterborne polyurethane. The cardanol is used as a starting raw material for synthesizing dihydric alcohol of cardanol, cardanol based waterborne polyurethane is synthesized in a condition without catalysts, the method comprises the followings steps: dihydric alcohol of cardanol is synthesized from a reaction of cardanol, the dihydric alcohol of cardanol is added into a performed polymer, a reaction is carried out between alcoholic hydroxyl and diisocyanate, and cardanol based waterborne polyurethane is prepared. The cardanol based waterborne polyurethane is successfully synthesized in a condition without catalysts, and the cardanol based waterborne polyurethane emulsion has the advantages of good dispersion stability, high fracture elongation, and good water resistance. The method has the advantages of cheap and easily available raw materials, mild reaction, simple process, easy operation, good practicality, mature reliable technology, green chemistry of target products, and environmental friendless.

Description

technical field [0001] The invention relates to a method for preparing water-based polyurethane by using vegetable oil-based cardanol as a raw material, and belongs to the technical field of water-based polyurethane preparation. Background technique [0002] Traditional polyurethane uses organic substances as solvents, and the products often contain organic volatile substances, which pollute the environment and endanger people's health. With the strengthening of national environmental protection laws and regulations and the enhancement of people's environmental protection awareness, the water-based polyurethane has been paid more and more attention. Water-based polyurethane uses water as the dispersion medium, which is non-toxic, non-flammable, and environmentally friendly. It is widely used in coatings and inks. and other fields. At present, the raw materials for preparing water-based polyurethane are mainly non-renewable resources such as polyester and polyether polyol. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/73C08G18/76C08G18/67C08G18/66C08G18/42C08G18/34
CPCC08G18/755C08G18/4238C08G18/6659C08G18/675C08G18/724C08G18/73C08G18/7614C08G18/0823
Inventor 蒋平平黄敏张萍波胡令
Owner JIANGNAN UNIV
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