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Composite bi-component polyurethane adhesive capable of resisting 121 DEG C thermophilic digestion as well as preparation method and using method of adhesive

A two-component polyurethane and polyurethane adhesive technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of inability to withstand high-temperature cooking, unfavorable development of national industries, and high cost. Achieve the effect of wide application, low cost and good polarity

Active Publication Date: 2015-01-28
MEGABOND HUANGSHAN ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of the economy, the flexible packaging industry has developed very rapidly, and aluminum / plastic and plastic / plastic materials are widely used, but products made of ordinary solvent-free polyurethane adhesives cannot withstand high-temperature cooking, and the high-end composite market has been monopolized by large foreign companies for a long time , the cost remains high, which is not conducive to the development of national industries

Method used

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  • Composite bi-component polyurethane adhesive capable of resisting 121 DEG C thermophilic digestion as well as preparation method and using method of adhesive
  • Composite bi-component polyurethane adhesive capable of resisting 121 DEG C thermophilic digestion as well as preparation method and using method of adhesive
  • Composite bi-component polyurethane adhesive capable of resisting 121 DEG C thermophilic digestion as well as preparation method and using method of adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A component:

[0029] Add 40.5g of isocyanate in the reaction kettle, drop 22g of polyester with a molecular weight of 1500 at 35°C at a rate of 300kg / h, and keep the temperature at 45°C for 3 hours after the addition; add 18gPPG2000 at a rate of 280kg / h at 35°C, After the dropwise addition, continue the reaction at 35°C for 2.5 hours to obtain component A;

[0030] B component:

[0031] Add 1 mol of castor oil, 1 mol of ethylene glycol, 1.5 mol of serotonin, and 0.5 mol of glycerin into the reactor, and alcoholyze at 220°C for 3 hours under the catalysis of 100ppm lithium hydroxide, then add 3 mol of sebacic acid and esterify at 230°C for 14 hours until the acid value is less than 5mgkoh / g, and the hydroxyl value is 130mgkoh / g, then cooled to 100°C and released for packaging.

[0032] According to the mass ratio of component A: component B = 100:62, it is coated on the bonded material by a solvent-free laminating machine, and cured at 45°C for 68 hours to obtain a tw...

Embodiment 2

[0034] A component:

[0035] Add 19g of isocyanate in the reaction kettle, add dropwise 21g of polyester with a molecular weight of 1500 at 40°C at a rate of 310kg / h, and keep the temperature at 45°C for 4 hours after the addition; add 17.14gPPG2000 dropwise at 40°C at a rate of 280kg / h, Continue the reaction at 40°C for 2.5h after the dropwise addition, continue to add 36gPPG1000 dropwise at a rate of 280kg / h, keep the temperature at 50°C for 3h after the dropwise addition, cool down to 45°C and discharge.

[0036] Component B: Add 1 mol castor oil, 1 mol ethylene glycol, 1.5 mol new fenugreek, and 0.5 mol glycerin to the reaction kettle, and alcoholyze at 240°C for 2.5 hours under the catalysis of 100 ppm lithium hydroxide, then add 2 mol of sebacic acid, 1 mol For terephthalic acid, esterify at 220°C for about 15 hours until the acid value is less than 5 mgkoh / g, and the hydroxyl value is 130 mgkoh / g, then cooled to 100°C for discharge and packaging.

[0037] According to ...

Embodiment 3

[0039] A component:

[0040] Add 40.5g of isocyanate in the reaction kettle, drop 22g of polyester with a molecular weight of 1500 at 45°C, the drop rate is 295kg / h, and keep the temperature at 45°C for 4 hours after the addition; add 18gPPG2000 dropwise at 45°C, and the drop rate is 280kg / h h, continue the reaction at 45°C for 2.5h after the dropwise addition, and obtain component A;

[0041] Component B: Add 1 mol castor oil, 1 mol ethylene glycol, 1.5 mol new fenugreek, and 0.5 mol glycerin to the reaction kettle, and alcoholyze at 240°C for 3.5 hours under the catalysis of 100 ppm lithium hydroxide, then add 3 mol of sebacic acid, 1 mol of Phthalic acid, esterified at 230°C for about 16 hours until the acid value is less than 5mgkoh / g, and the hydroxyl value is 130mgkoh / g, cooled to 100°C for discharge and packaging.

[0042] Mix according to the mass ratio of component A: component B = 100:85, then apply it to the bonded material through a solvent-free laminating machine...

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Abstract

The invention provides a composite bi-component polyurethane adhesive capable of resisting 121 DEG C thermophilic digestion as well as a preparation method and a using method of the adhesive. The polyurethane adhesive comprises a component A and a component B, wherein the component A comprises isocyanate, polyester with a molecular weight of 1500 and PPG2000; and the component B comprises castor oil, glycol, neopentyl glycol, glycerinum and sebacic acid. As the molecular chain has an isocyanate group, a carbamic acid ester group and castor oil, the polyurethane adhesive shows high flexibility, polarity and relatively good adhesion; and by importing the plant oil, the dependency to the petroleum is reduced. Compared with the prior art, the degradable solvent-free polyurethane adhesive is extensive in use, has good adhesion in the aluminum / plastic and plastic / plastic composition, is capable of resisting 121 DEG C thermophilic digestion in plastic-plastic composite materials, has better peel strength than common solvent-free adhesives, and is low in application cost, environment-friendly, sanitary and safe.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a two-component polyurethane adhesive for high-temperature cooking and compounding that can withstand 121°C and its preparation and use methods. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives are divided into two categories: polyisocyanate and polyurethane. Polyisocyanate molecular chains contain isocyano groups (-NCO) and carbamate groups (-NH-COO-), so polyurethane adhesives exhibit high activity and polarity. It has excellent chemical adhesion to substrates containing active hydrogen, such as porous materials such as foam, plastic, wood, leather, fabric, paper, ceramics, and materials with smooth surfaces such as metal, glass, rubber, and plastic. [0003] With the development of the economy, the flexible packaging industry has developed very rapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/67C08G18/48C08G18/42
Inventor 张建宏童艳丽程有仙汪芬妹
Owner MEGABOND HUANGSHAN ADHESIVE
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