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Waterborne polyurethane, preparation method of waterborne polyurethane and adhesive

A technology of water-based polyurethane and polymerization inhibitor, applied in the field of polyurethane, can solve the problems to be further improved, and achieve the effect of good weather resistance and good water resistance

Active Publication Date: 2016-07-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the prior art provides a variety of water-based polyurethane adhesives, the weather resistance of these water-based polyurethane adhesives still needs to be further improved, so that it has a wider range of applications

Method used

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  • Waterborne polyurethane, preparation method of waterborne polyurethane and adhesive
  • Waterborne polyurethane, preparation method of waterborne polyurethane and adhesive
  • Waterborne polyurethane, preparation method of waterborne polyurethane and adhesive

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preparation example Construction

[0059] In the present invention, the preparation method of the waterborne polyurethane described in above-mentioned technical scheme comprises the following steps:

[0060]1), under the effect of catalyst and polymerization inhibitor, react the polymer polyol and diisocyanate with formula II structure, obtain the first intermediate;

[0061] 2), reacting the first intermediate, dimethylolpropionic acid and trimethylolpropane to obtain a second intermediate;

[0062] 3), reacting the second intermediate and butanediol to obtain the third intermediate;

[0063] 4), performing a click reaction on the third intermediate and the mercapto fluorine-containing compound to obtain the fourth intermediate;

[0064] 5), reacting the fourth intermediate with an organic amine to obtain a fifth intermediate;

[0065] 6), reacting the fifth intermediate and sodium 2,4-diaminobenzenesulfonate to obtain a water-based polyurethane having a structure of formula I;

[0066]

[0067] In Formu...

Embodiment 1

[0114] Under nitrogen protection, add 0.04g dibutyltin dilaurate, 0.02g p-hydroxyanisole, 70g 2,4-toluene diisocyanate and 200mL butanone were reacted at a temperature of 75°C for 6 hours to obtain the first intermediate;

[0115] Add 13.8g dimethylolpropionic acid, 1.6g trimethylolpropane and 200mL butanone to the first intermediate, and react at a temperature of 80°C for 5 hours to obtain the second intermediate;

[0116] Add 14g of butanediol and 120mL of butanone to the second intermediate at a temperature of 90°C and react for 4 hours to obtain the third intermediate;

[0117] Add 3.6 g of 5-difluoromethoxy-2-mercapto-1H-benzimidazole (compound of formula III) to the third intermediate at a temperature of 80°C and react for 24 hours to obtain the fourth intermediate;

[0118] Add 4.2 g of triethylamine to the fourth intermediate at a temperature of 30° C. and react for 1 hour to obtain the fifth intermediate;

[0119] Add 300g of deionized water and 0.45g of sodium 2,4-...

Embodiment 2

[0126] Under nitrogen protection, to 380g polymer polyol (with formula II structure, wherein m=70, n=70, p=30), 0.21g stannous octoate, 0.15g hydroquinone, 226g diphenylmethane Add 800mL of acetone to the isocyanate, the temperature is 85°C, and react for 2.5h to obtain the first intermediate;

[0127] Add 43.2g of dimethylolpropionic acid, 5.4g of trimethylolpropane and 500mL of acetone to the first intermediate at a temperature of 90°C and react for 2 hours to obtain the second intermediate;

[0128] Add 32 g of diethylene glycol and 280 mL of acetone to the second intermediate at a temperature of 100° C. and react for 2 hours to obtain the third intermediate;

[0129] Add 9.8 g of 2-mercapto-4-(trifluoromethyl)pyrimidine (compound of formula IV structure) to the third intermediate at a temperature of 85°C and react for 16 hours to obtain the fourth intermediate;

[0130] Add 11.7g of dimethylethanolamine to the fourth intermediate at a temperature of 45°C and react for 0.5...

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Abstract

The invention provides waterborne polyurethane adopting the structure shown in formula I, a preparation method of waterborne polyurethane and an adhesive. According to the method, polymer polyols adopting the structure shown in formula II and a sulfhydryl fluorinated compound are subjected to a click reaction, and waterborne polyurethane is prepared. The adhesive is prepared from components in parts by weight as follows: 50-200 parts of waterborne polyurethane, 0.5-1.5 parts of a thickening agent, 0.03-0.18 parts of a defoaming agent, 0.06-0.22 parts of a dispersing agent, 15-26 parts of filler, 8.5-12.5 parts of titanium dioxide, 0.7-2.1 parts of an anti-settling agent and 3.8-13.5 parts of a curing agent. Waterborne polyurethane has a hydrophobic branch containing inert fluorine atoms and has relatively good water resistance, and the adhesive prepared from polyurethane is relatively good in weather resistance.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a water-based polyurethane, a preparation method thereof and an adhesive. Background technique [0002] Compared with the water-based polyurethane prepared by the traditional polyester polyol and polyether polyol, the water-based polyurethane prepared by poly(carbonate-ether) polyol has excellent water resistance and mechanical properties, and is an ideal raw material for the preparation of water-based adhesives . The Chinese patent with the application number 201410258761.7 uses poly(carbonate-ether) polyol as the soft segment and polyethylene glycol as the hydrophilic polymer component to prepare non-ionic water-based polyurethane, which is prepared by using this non-ionic water-based polyurethane The water-based adhesive has excellent resistance to high and low temperature and humidity and heat, and its peeling force is 160N / cm~240N / cm. After 4 cycles of high and low tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/44C08G18/48C08G18/66C08G18/83C08G18/32C08G18/34C09J175/06C09J175/08C09J11/04
CPCC08G18/10C08G18/44C08G18/4825C08G18/664C08G18/6644C08G18/6659C08G18/6674C08G18/6677C08G18/6692C08G18/833C08G18/834C08K3/22C08K2003/2241C09J11/04C09J175/06C09J175/08C08G18/3206C08G18/348
Inventor 张红明付双滨李颖董艳磊王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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