A kind of two-component polyurethane adhesive and its preparation and application

A two-component polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, polymer adhesive additives, etc., can solve the problems of industrial belt warping, etc., to solve the problem of easy warping and simple preparation , good low temperature resistance effect

Active Publication Date: 2020-06-19
INO IND BELTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a kind of interlayer lamination at low temperature, fast curing speed after bonding, high initial and ultimate peel strength, which can effectively solve the problem of industrial belt Two-component polyurethane adhesive that easily causes edge warping when laminating at high temperature and its preparation and application

Method used

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  • A kind of two-component polyurethane adhesive and its preparation and application
  • A kind of two-component polyurethane adhesive and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of hyperbranched polyphenylene ether:

[0032] N 2 Under atmosphere, mix 2.0g 4-bromo-4',4"-dihydroxytriphenylmethane, 0.75g anhydrous K 2 CO 3 , 80mL of toluene and 80mL of DMSO were added to a three-necked flask, the temperature was raised to reflux for dehydration for about 3 hours, the temperature of the reaction system was lowered to 45°C, the catalyst 0.01g CuCl was added, and then the temperature was raised to 170±2°C for 40h at constant temperature. After the reaction solution was cooled to room temperature, it was acidified with hydrochloric acid, stirred for a period of time, dropped into methanol / water mixture (v / v=4 / 6) to precipitate, filtered, and vacuum-dried at 60°C to obtain the crude product. The crude product was dissolved in a small amount of THF and filtered; the filtrate was precipitated with cyclohexane, filtered again, washed with cyclohexane, and dried in vacuum at 90°C to obtain a brick-red powder polymer hyperbranched polyphenylen...

Embodiment 2

[0040] In this example, see Example 1 for the preparation of hyperbranched polyphenylene ether.

[0041] 50g of polycaprolactone diol ester diol with a relative molecular weight of 1000, 15g of hyperbranched polyphenylene ether after vacuum dehydration, under a nitrogen atmosphere, 80g of isophorone diisocyanate was added and reacted at 60°C for 6 hours, and the NCO% was analyzed by sampling After the content reaches the set value (15%), after the temperature is lowered, it is airtightly flushed with nitrogen and stored to obtain the A component containing -NCO (referred to as A-2);

[0042] After vacuum dehydration of 5g of 1,3-propanediol and 4g of liquid rosin resin, 0.5g of bismuth 2-ethylhexanoate was added and blended uniformly to obtain component B (denoted as B-2);

[0043] The A-2 component is cooled to 60°C after melting, and mixed evenly with the B-2 component according to the functional group molar ratio NCO / OH=1.05 to obtain a two-component polyurethane adhesive. ...

Embodiment 3

[0045] In this example, see Example 1 for the preparation of hyperbranched polyphenylene ether.

[0046] 45g of phthalic anhydride diethylene glycol with a relative molecular weight of 2000, 15g of hyperbranched polyphenylene ether after vacuum dehydration, under a nitrogen atmosphere, 38g of polymethylene polyphenylisocyanate was added to react at 70°C for 5 hours, and the samples were analyzed After the NCO% content reaches the set value (8%), it is stored in an airtight nitrogen flush after cooling to obtain the A component containing -NCO (referred to as A-3);

[0047] After vacuum dehydration of 8g of 1,4-butanediol and 5g of liquid rosin resin, 0.16g of dibutyltin dilaurate was added and blended uniformly to obtain component B (referred to as B-3);

[0048] After melting, the temperature of component A-3 is lowered to 70°C, and the component B-3 is uniformly mixed with functional group molar ratio NCO / OH=1.15 to obtain a two-component polyurethane adhesive.

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Abstract

The invention relates to an environment-friendly double-component polyurethane adhesive as well as preparation and application thereof. The polyurethane adhesive is prepared from a component A and a component B by mixing, wherein the component A is an isocyanate end capped polyurethane prepolymer; the component B is a catalysis component with a terminal hydroxyl chain extender; and the mole ratio of the component A to the component B is NCO:OH=(0.85-2.5):1 according to functional groups. The polyurethane adhesive is used for preparing industrial belts. Compared with the prior art, the environment-friendly double-component polyurethane adhesive provided by the invention is applied to interlayer adhesion of industrial belts and is rapid in curing speed, relatively low in viscosity, relatively high in peeling strength and good in low temperature resistance, water resistance and thermal resistance, and the technical problem that edge warping of industrial belts can be easily caused in high-temperature adhesion is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of industrial belt material processing, and relates to a two-component polyurethane adhesive and its preparation and application. Background technique [0002] Industrial belts are divided into conveyor belts and conveyor belts, which provide convenience for material transportation in various industries. With the development of various industries, the demand for industrial belts is increasing. Industrial belts are mainly bonded by covering glue and base cloth (skeleton material). According to different purposes, they can be bonded by one or more layers of adhesive. In other words, if the cohesive force is too low, the wear resistance of the product will be seriously reduced, and the layers will be easily separated. [0003] At present, the interlayer bonding of industrial belts is mainly solvent-based adhesives. For example, the solvent-based two-component polyurethane (PU) adhesive currently used has a sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J11/08C08G18/66C08G18/42C08G18/32C08G18/44C08G65/38B65G15/32
CPCB65G15/32C08G18/4238C08G18/425C08G18/4277C08G18/44C08G18/664C08G65/38C08L2201/08C08L2205/03C09J11/08C09J175/06C08L71/12C08L93/04C08L101/005
Inventor 涂国圣黄萍珍涂木林
Owner INO IND BELTING CO LTD
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