Cationic type polypropylene carbonate waterborne polyurethane emulsion as well as preparation method and application

A technology of polypropylene carbonate and water-based polyurethane, applied in the field of water-based polyurethane, which can solve the problems of poor water resistance, limited practical performance, and low mechanical strength of cationic water-based polyurethane, and achieve excellent adhesion, enhanced fiber strength and pressure, and penetration Good performance of sex and adhesion

Inactive Publication Date: 2013-12-11
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the disadvantages of poor water resistance and low mechanical str

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Each component is operated according to the following steps: 65 parts by mass of polypropylene carbonate polyol and 25 parts by mass of IPDI are added into a three-necked flask with an electric stirring device and mixed, the temperature is raised to 60° C., 0.8 parts by mass of DBTDL is added, and gradually The temperature was raised to 85°C, and the reaction was kept for 2 hours; the temperature was lowered to 40°C, 6.7 parts by mass of N-methyldiethanolamine was slowly added dropwise, and the reaction was carried out for 3 hours; acetone to adjust the viscosity to prevent gel formation due to excessive viscosity; when the temperature drops to 35-45°C, add 3 parts by mass of acetic acid to react for 0.5 h; add 250 parts by mass of deionized water to emulsify, stir at high speed for 1 h, evaporate the acetone, The cationic polypropylene carbonate aqueous polyurethane emulsion is obtained.

[0027] After the obtained emulsion was formed into a film an...

Example Embodiment

[0028] Example 2

[0029] Each component is operated according to the following steps: 65 parts by mass of polypropylene carbonate polyol and 25 parts by mass of IPDI are added into a three-necked flask with an electric stirring device and mixed, the temperature is raised to 60° C., 0.8 parts by mass of DBTDL is added, and gradually The temperature was raised to 85°C, and the reaction was incubated for 2 hours; the temperature was lowered to 40°C, and 6 parts by mass of N-methyldiethanolamine were slowly added dropwise for 3 hours; the temperature was raised to 60°C, 2 parts by mass of glycerol were added, and the reaction was performed for 1 hour; 100 parts by mass of acetone was used to adjust the viscosity to prevent the formation of gel due to excessive viscosity; when the temperature dropped to 35-45°C, 2.8 parts by mass of acetic acid was added to react for 0.5 h; Acetone is used to obtain cationic polypropylene carbonate aqueous polyurethane emulsion.

[0030] After th...

Example Embodiment

[0031] Example 3

[0032] Each component is operated according to the following steps: 65 parts by mass of polypropylene carbonate polyol and 25 parts by mass of IPDI are added into a three-necked flask with an electric stirring device and mixed, the temperature is raised to 60° C., 0.8 parts by mass of DBTDL is added, and gradually The temperature was raised to 85°C, and the reaction was kept for 2 hours; the temperature was lowered to 40°C, 6.5 parts by mass of N-methyldiethanolamine was slowly added dropwise, and the reaction was carried out for 3 hours; ; Add 80-100 parts by mass of acetone to adjust the viscosity to prevent the formation of gel due to excessive viscosity; when the temperature drops to 35-45 ℃, add 3 parts by mass of acetic acid to react for 0.5h; add 250 parts by mass of deionized water to emulsify and stir at high speed For 1 h, the acetone was evaporated to obtain a cationic polypropylene carbonate aqueous polyurethane emulsion.

[0033] After the obta...

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PUM

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Abstract

The invention belongs to the field of waterborne polyurethane and discloses a cationic type polypropylene carbonate waterborne polyurethane emulsion as well as a preparation method and the application thereof. The preparation method comprises the following steps: mixing polypropylene carbonate polyol with diisocyanate, raising temperature to 60 DEG C, adding a catalyst, gradually raising temperature to 80-90 DEG C, performing heat reaction for 2-3 h; reducing temperature to 40 DEG C, dropwise adding cationic hydrophilic chain extender, taking reaction for 3-4 h; raising temperature to 60 DEG C, adding small molecular chain extender, taking reaction for 1-2 h, and adding appropriate acetone to adjust the viscosity; when reducing temperature to 35-45 DEG C, adding a salt-forming agent to take reaction for 05-1 h; adding deionized water to emulsify the liquid, stirring the liquid at high speed, and evaporating to remove acetone, so as to obtain the cationic type polypropylene carbonate waterborne polyurethane emulsion. The cationic type polypropylene carbonate waterborne polyurethane emulsion is of excellent cohesiveness, and the obtained latex film has good transparency and good tear-resisting strength, so as to be taken as a waterborne coating and an adhesive.

Description

technical field [0001] The invention belongs to the field of water-based polyurethane, in particular to a cationic polypropylene carbonate water-based polyurethane emulsion and a preparation method and application thereof. Background technique [0002] Polypropylene carbonate polyol (PPC) is made of CO 2 A new type of aliphatic polycarbonate polyol resin, which is copolymerized with propylene oxide (PO), has abundant sources of synthetic raw materials and low price, and is of great significance to the comprehensive utilization of carbon dioxide. The content of COO structural units in polypropylene carbonate polyol is relatively high, and the molar fraction is between 25% and 50%. The catalyst used in the reaction is cheap, the reaction operation is simple, and the reaction energy consumption is also low. If it is produced on a large scale, the production cost of polypropylene carbonate polyol can be greatly reduced. Polypropylene carbonate polyol is a polymer with hydroxyl...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C09D175/04C09J175/04C14C11/00C03C17/32
Inventor 王斌刘化珍刘伟区区菊花杨永严杰
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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