Preparation method of waterborne polyurethane resin

A technology of water-based polyurethane and polyurethane prepolymer, which is applied in the field of polymer material manufacturing, can solve problems such as low strength and general wear resistance, and achieve the effects of increasing strength, improving compatibility and cohesive force, and high strength

Inactive Publication Date: 2015-02-11
JIANGSU HUAXIA PAINT MAKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: currently commonly used water-based polyurethane re

Method used

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  • Preparation method of waterborne polyurethane resin
  • Preparation method of waterborne polyurethane resin
  • Preparation method of waterborne polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 6

[0043] Different polyols were used in this example.

[0044] (1) Acetone 480.0g, toluene diisocyanate 522.0g, aminopropyl cage silsesquioxane T88.8g, polyol 62.0g, dimethylol propionic acid 104.0g, catalyst di-n-butyltin dilaurate 1.00 After mixing evenly, carry out prepolymerization reaction at 50-110°C for 2 hours to obtain polyurethane prepolymer.

[0045] (2) Add 50.7g of ammonia water (26wt%) to the polyurethane prepolymer at room temperature, then add 850.0g of water to disperse, and then add 71.0g of chain extender ethylenediamine at 30°C to carry out the chain extension reaction for 3 hours. At room temperature, water-based polyurethane is obtained.

[0046] The performance data of the prepared water-based polyurethane are shown in Table 3:

[0047] Table 3 Performance data of waterborne polyurethane

[0048]

[0049] It can be seen from Table 3 that when different polyols are used as polymerized monomers, the problem of improving wear resistance can be solved.

Embodiment 7

[0051] Different hydrophilic monomers were used in this example.

[0052] (1) Acetone 480.0g, toluene diisocyanate 522.0g, aminopropyl cage silsesquioxane T88.8g, polyethylene glycol 100062.0g, hydrophilic monomer 104.0g, catalyst di-n-butyltin dilaurate After 1.00 g of the mixture is uniformly mixed, the prepolymerization reaction is carried out at 50-110°C for 2 hours to obtain a polyurethane prepolymer.

[0053] (2) Add 50.7g of ammonia water (26wt%) to the polyurethane prepolymer at room temperature, then add 850.0g of water to disperse, and then add 71.0g of chain extender ethylenediamine at 30°C to carry out the chain extension reaction for 3 hours. At room temperature, water-based polyurethane is obtained.

[0054] The performance data of the prepared water-based polyurethane is shown in Table 4:

[0055] Table 4 Performance data of waterborne polyurethane

[0056]

[0057]

[0058] It can be seen from Table 4 that when different hydrophilic monomers are used, ...

Embodiment 8

[0060] In this example, alkyd resin-modified polyisocyanate is used. The modification method is: mix 30 g of cottonseed oil and 4 g of glycerin evenly, heat up to 120 ° C, add 0.1 g of KOH catalyst, react at 200 ° C for 2 hours, and cool down Finally, add 3g of benzoic acid and react at 180°C for 2h. When the temperature is lowered to 40°C, add 30g of toluene diisocyanate and 20g of xylene, raise the temperature to 65°C and keep it for 2h. After cooling down to room temperature, filter to obtain the modified alkyd resin non-toxic polyisocyanate. It is used in the preparation of waterborne polyurethane.

[0061] (1) 480.0g of acetone, 522.0g of toluene diisocyanate modified by alkyd resin, 88.8g of aminopropyl cage silsesquioxane T88.8g, 100062.0g of polyethylene glycol, 104.0g of hydrophilic monomer, catalyst After mixing 1.00 g of di-n-butyltin dilaurate evenly, conduct a prepolymerization reaction at 50-110° C. for 2 hours to obtain a polyurethane prepolymer.

[0062] (2) ...

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Abstract

The invention relates to a preparation method of waterborne polyurethane resin, and belongs to the field of preparation of high polymer materials. The method comprises the following steps: mixing acetone, polyisocyanates, amino polyhedral oligomeric silsesquioxane, polyhydric alcohols, a hydrophilic functional monomer and a catalyst di-n-butyltin dilaurate evenly, and then carrying out prepolymerization reaction at 50-110 DEG C for 2-4 hours to obtain a polyurethane prepolymer; adding the polyurethane prepolymer to a neutralizer which is equal to the hydrophilic functional monomer in molar ratio at room temperature, and then adding water to disperse; adding a chain extender at 30-50 DEG C to carry out chain extension for 2-4 hours; and cooling to room temperature to obtain waterborne polyurethane. The polyurethane resin prepared by the method is in an inorganic hybrid structure, and has inorganic nanometer enhancement.

Description

technical field [0001] The invention belongs to the field of polymer material manufacturing, in particular to a preparation method of water-based polyurethane resin. Background technique [0002] Polyurethane is a macromolecular compound containing repeated urethane groups in the main chain, and it is also a polymer material with both rubber and plastic properties, and its performance is an emerging material that can be adjusted. Products made of polyurethane cover a wide range of products, including polyurethane foam, elastomers, coatings, adhesives, synthetic fibers, synthetic leather, and waterproof materials. [0003] Water-based polyurethane adhesive refers to the adhesive formed by dissolving or dispersing polyurethane in water. According to its appearance and particle size, water-based polyurethane can be divided into three categories: polyurethane aqueous solution (particle size <0.001μm, transparent appearance), polyurethane dispersion Liquid (particle size 0.00...

Claims

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Application Information

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IPC IPC(8): C08G18/38C08G18/32C08G18/34C08G18/66C08G18/48C08G18/12
CPCC08G18/3893C08G18/12C08G18/3206C08G18/348C08G18/6674C08G18/6692C08G18/755C08G18/7614C08G18/771C08G18/3228
Inventor 程齐利洪昕林
Owner JIANGSU HUAXIA PAINT MAKING
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