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Polyhydric alcohol, waterborne polyurethane and preparation method and application of waterborne polyurethane

A technology of water-based polyurethane and polyol, which is applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., to achieve the effects of improved peeling force, good hydrolysis resistance and heat and humidity resistance

Active Publication Date: 2016-08-17
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 currently disclosed poly(carbonate-ether) polyol is used as a water-based polyurethane soft segment, the prepared water-based polyurethane adhesive has good hydrolysis resistance, but compared with the solvent-based polyurethane adhesive, there is still a large gap. Therefore, the hydrolysis resistance and heat and humidity resistance of waterborne polyurethane need to be further improved

Method used

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  • Polyhydric alcohol, waterborne polyurethane and preparation method and application of waterborne polyurethane
  • Polyhydric alcohol, waterborne polyurethane and preparation method and application of waterborne polyurethane
  • Polyhydric alcohol, waterborne polyurethane and preparation method and application of waterborne polyurethane

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preparation example Construction

[0055] The present invention also provides a kind of preparation method of aqueous polyurethane, comprising:

[0056] 1) will have the H-R of formula (I) structure 2 -H, ONC-R 1 -CNO, catalyst and solvent react to obtain the first intermediate;

[0057] The H-R 2 -H has the structure of formula (I),

[0058]

[0059] Among them, 10≤m≤40, 10≤n≤40, 10≤x≤30, 10≤y≤30;

[0060] The R 0 It is a C1~C10 alkylene group or a C6~C20 arylene group;

[0061] The R 1 It is an arylene group of C6-C35, a cycloalkylene group of C5-C30 or an alkylene group of C3-C12;

[0062] 2) reacting the first intermediate, 1,4-cyclohexanediol and dimethylol propionic acid to obtain the second intermediate;

[0063] 3) reacting the second intermediate with triethylamine to obtain a water-based polyurethane having a structure of formula (II),

[0064]

[0065] According to the present invention, the present invention will have the polypolyol of formula (I), ONC-R 1 -CNO, catalyst and solvent re...

Embodiment 1

[0076] The preparation of the polypolyol of formula (I) structure:

[0077] 0.026g of Zn 3 [Co(CN) 6 ] 2 Bimetallic catalyst, 0.14g sebacic acid, 15g propylene oxide and 7g allyl glycidyl ether were successively added to the high-pressure reactor which had been treated with dehydration and oxygen removal in advance, and 6.3g carbon dioxide was fed into it, at 2MPa pressure and temperature The polymerization reaction was carried out at 50° C. for 24 hours to obtain a polypolyol having the structure of formula (I).

[0078] The structure of the obtained polypolyol is detected, and the results are shown in Figure 1 ~ Figure 2 , figure 1 Infrared spectrogram for the polypolyol prepared in Example 1 of the present invention; figure 2 For the polypolyol prepared in Example 1 of the present invention 1 HNMR figure; the results show that,

[0079] 1 HNMR (CDCl 3 ):1.31ppm, 1.60ppm, 1.78ppm, 2.34ppm, 3.52ppm, 3.65ppm, 4.00ppm, 4.21ppm, 4.43ppm, 4.53ppm, 4.82ppm, 4.95ppm, 5.1...

Embodiment 2

[0082] The preparation of the polypolyol of formula (I) structure:

[0083] 0.078g of Zn 3 [Co(CN) 6 ] 2 Bimetallic catalyst, 0.85g terephthalic acid, 38g propylene oxide and 24g allyl glycidyl ether were successively added to the autoclave which had been treated with dewatering and oxygen removal in advance, and 52.7g carbon dioxide was fed into it, at 5MPa pressure and The polymerization reaction was carried out at a temperature of 80° C. for 4 hours to obtain a polypolyol having a structure of formula (I).

[0084] The structure of the obtained polypolyol is detected, and the results show that,

[0085] 1 HNMR (CDCl 3 ): 1.35ppm, 1.63ppm, 1.72ppm, 2.30ppm, 3.56ppm, 3.62ppm, 4.05ppm, 4.26ppm, 4.48ppm, 4.59ppm, 4.83ppm, 4.97ppm, 5.22ppm, 5.31ppm, 5.83ppm, 7.26ppm.

[0086] FTIR:553.2cm -1 ,781.2cm -1 ,923.9cm -1 ,996.2cm -1 ,1092.7cm -1 ,1250.2cm -1 ,1351.2cm -1 ,1444.2cm -1 ,1642.3cm -1 ,1740.2cm -1 ,1812.3cm -1 ,1993.2cm -1 ,2351.8cm -1 ,2864.2cm -1 ,292...

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Abstract

The invention provides polyhydric alcohol, waterborne polyurethane adhesive and a preparation method and application of waterborne polyurethane. The polyhydric alcohol has a structure shown in formula (I). According to the polyhydric alcohol, allyl is introduced and arranged at the non-end-group position of the polyhydric alcohol, when the polyhydric alcohol is applied to preparing the waterborne polyurethane, the light-heat dual curing waterborne polyurethane is obtained and applied to preparing the adhesive, and the obtained adhesive has very good hydrolytic resistance and wet-heat resistant performance.

Description

technical field [0001] The invention relates to the field of water-based adhesives, in particular to a polypolyol, a water-based polyurethane adhesive and a preparation method and application thereof. Background technique [0002] The main chain structure of water-based polyurethane contains hydrophilic groups, so its hydrolysis resistance is worse than that of solvent-based polyurethane adhesives. Improving the hydrolysis resistance of water-based polyurethane adhesives is the development trend in this field. The patent with application number 201410258761.7 discloses that poly(carbonate-ether) polyol is used as the soft segment and polyethylene glycol is used as the hydrophilic polymer component to synthesize non-ionic water-based polyurethane, and the obtained water-based glue has excellent resistance to heat and humidity After 4 cycles of high and low temperature impact and damp heat tests, the film has no warping or peeling, and the peeling force is 140N / cm-210N / cm. Th...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/34C08G18/32C08G18/10C08G64/34C09J175/14
CPCC08G18/0823C08G18/10C08G18/3212C08G18/348C08G18/6705C08G64/34C09J175/14
Inventor 张红明乔立军赵强王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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