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A kind of low-melt viscosity high-pressure waterproof moisture-curing hot-melt adhesive and preparation method thereof

A moisture-curing, low-melt-viscosity technology, applied in adhesive types, adhesives, polyurea/polyurethane adhesives, etc., can solve problems such as high melt viscosity, achieve high bonding strength, overcome internal stress, reduce The effect of crystallinity

Active Publication Date: 2022-01-07
YANTAI SEAYU NEW MATERIALS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And solve the disadvantages of traditional hot melt adhesives that often have high melt viscosity while improving the temperature resistance and waterproof performance

Method used

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  • A kind of low-melt viscosity high-pressure waterproof moisture-curing hot-melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0049]Mix 40g of self-made low molecular weight polyester polyol (average molecular weight at 3000, hydroxyl value (mgKOH / g): 81.2) and 25g of polycaprolactone diol (average molecular weight at 2000, hydroxyl value (mgKOH / g): 56.1) The mixture, 15g of terpene resin was added to the reaction kettle and mixed and stirred at a stirring speed of 300rpm, the temperature was raised to 100-120 ℃, and the stirring was continued; when the mixture in the kettle was homogeneous, the vacuum pump was turned on, and the vacuum was evacuated, and the pressure was controlled at 0.01-0.098 MPa dehydration for two hours; after cooling down to 85-90 °C, add 15 g of diphenylmethane diisocyanate and 0.5 g of dibutyltin dilaurate into the reaction kettle, turn on the vacuum and keep stirring at 85-90 °C for 80 minutes, Stirring speed 150rpm; add 1.5g 1.4-butanediol, vacuumize and stir at 85-90°C for 120 minutes, stirring speed 150rpm; finally add 1g carbonized PMMA filler and 0.5g 4,4'-(oxydi-2, 1-...

example 2

[0051] Mix 45g of self-made low molecular weight polyester polyol (average molecular weight at 3000, hydroxyl value (mgKOH / g): 81.2) and 20g of polycaprolactone diol (average molecular weight at 2000, hydroxyl value (mgKOH / g): 56.1) The mixture, 15g of terpene resin was added to the reaction kettle and mixed and stirred at a stirring speed of 300rpm, the temperature was raised to 100-120 ℃, and the stirring was continued; when the mixture in the kettle was homogeneous, the vacuum pump was turned on, and the vacuum was evacuated, and the pressure was controlled at 0.01-0.098 MPa dehydration for two hours; after cooling down to 85-90°C, add 15 g diphenylmethane diisocyanate and 0.5 g dibutyltin dilaurate into the reaction kettle, turn on the vacuum and keep stirring at 85-90°C for 80 minutes, Stirring speed 150rpm; add 1.5g 1.4-butanediol, vacuumize and stir at 85-90°C for 120 minutes, stirring speed 150rpm; finally add 2g carbonized PMMA filler and 0.5g 4,4'-(oxydi-2, 1-ethaned...

example 3

[0053] Mix 50g of self-made low molecular weight polyester polyol (average molecular weight at 3000, hydroxyl value (mgKOH / g): 81.2) and 15g of polycaprolactone diol (average molecular weight at 2000, hydroxyl value (mgKOH / g): 56.1) The mixture, 15g of terpene resin was added to the reaction kettle and mixed and stirred at a stirring speed of 300rpm, the temperature was raised to 100-120°C, and the stirring was continued; when the kettle was mixed

[0054] After the material is homogeneous, turn on the vacuum pump, evacuate, and control the pressure at 0.01-0.098MPa for dehydration for two hours; after cooling down to 85-90°C, add 15 g of diphenylmethane diisocyanate and 0.5 g of dibutyltin dilaurate to the reaction In the kettle, turn on the vacuum and keep stirring at 85-90°C for 80 minutes at a stirring speed of 150rpm; add 1.5g of 1.4-butanediol, vacuumize and stir at 85-90°C for 120 minutes at a stirring speed of 150rpm; finally add 3g of carbonized PMMA filler and 0.5g o...

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Abstract

The invention discloses a low-melt-viscosity high-pressure waterproof moisture-curing hot-melt adhesive and a preparation method thereof, belonging to the field of moisture-curing hot-melt adhesives. The invention adopts polyester / polyether polyol compound, which not only has high bonding strength, but also has fast curing speed, and can also overcome the problem of internal stress caused by too fast crystallization. A certain proportion of polyether polyol can provide adhesive flexibility and excellent hydrolysis resistance. And the self-made polyester polyol is based on adipic acid, and a dicarboxylic acid with two benzene rings is introduced to synthesize a low-molecular-weight polyester polyol with a relatively complex main chain structure, thereby reducing the concentration of adipic acid. Crystallinity, Melting Temperature and Melt Viscosity of Ethylene Glycol Polyesters. At the same time, the waterproof performance of the adhesive is greatly improved. At the same time, a certain proportion of carbonized acrylonitrile and other carbonized polymers are used as water-blocking fillers, which have better water-blocking effects than other water-blocking fillers.

Description

technical field [0001] The invention belongs to the field of moisture-curing hot-melt adhesives, in particular to a low-melt-viscosity high-pressure waterproof moisture-curing hot-melt adhesive and a preparation method thereof. Background technique [0002] In recent years, moisture-curing polyurethane adhesives have been used more and more widely in automotive structures and parts, such as windshield sealing, fixing of structural parts and assembly of lamps, etc.; textile industry and shoemaking industry; wireless book binding; Wood processing and furniture industry; board, board / decorative board composite, furniture, cabinet and bathroom cabinet, etc. production. Construction industry, indoor and outdoor building components and plate frame assembly, door frame assembly, roof, basement and tunnel and other waterproof materials laying, etc. Electronic and electrical industry, especially suitable for assembly line production of precision devices in the electronic and electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J175/08C09J145/00C09J11/04C08G18/66C08G18/42C08G18/32C08G63/185C08G63/78
CPCC09J175/06C09J175/08C09J11/04C08G18/664C08G18/4227C08G18/4277C08G18/3206C08G63/185C08G63/78C08L2201/08C08G2170/20C08L45/00C08K3/04
Inventor 李娜李峰贺国新张利文
Owner YANTAI SEAYU NEW MATERIALS CORP LTD
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