Preparation method for silane-modified moisture-curable polyurethane hot melt adhesive

A technology of polyurethane hot melt adhesive and silane modification, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc. Fully respond to problems such as low wettability of waterproof fabrics, and achieve the effect of improving washing and peeling resistance, enhancing van der Waals force, and broadening application fields and development space.

Active Publication Date: 2015-03-25
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, conventional polyurethane hot-melt adhesive products have poor wettability to substrates with low surface energy or chemically treated waterproof fabrics, so that polyurethane hot-melt adhesives cannot fully react, resulting in poor bonding effect, which limits the use of polyurethane hot-melt adhesives. Application fields and development space of glue products

Method used

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  • Preparation method for silane-modified moisture-curable polyurethane hot melt adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Install a thermometer, mechanical stirring, condenser and nitrogen inlet tube on a 1000mL four-necked flask, weigh 160g of polyoxypropylene diol (number average molecular weight 1000), polyethylene adipate diol (number average molecular weight 4000) ) 45.25g, acrylic resin 60g, antioxidant 1010 0.64g, sodium distyryl biphenyl disulfonate 0.8g, then heated to 120-140°C, stirred and mixed, while degassing under reduced pressure for 2h (absolute pressure 100Pa), cooling down To 90°C; under nitrogen protection, add 62.5 g of 4,4′-diphenylmethane diisocyanate, 0.1 g of the compound of stannous octoate and bismorpholine diethyl ether in a mass ratio of 1:1, 85~95°C Under the conditions, the reaction time was 45 min. Under the protection of nitrogen, 2.4 g of 1,4-butanediol was added, and the mixture was stirred at 85-95°C for 1 h. The above prepolymer was discharged under the protection of nitrogen, sealed and packaged, and aged at 85°C for 6 hours to obtain the product, num...

Embodiment 2

[0027] Install a thermometer, mechanical stirring, condenser and nitrogen gas inlet tube on a 1000mL four-neck flask, weigh 160g of polyethylene glycol (number average molecular weight 1250), polybutylene adipate diol (number average molecular weight 1000) 45.25g, phenolic resin 60g, antioxidant 1010 0.64g, triazineaminostilbene 0.8g, then heated to 120-140°C, stirred and mixed, and degassed under reduced pressure for 2 hours (absolute pressure 100Pa), cooled to 90°C ; Add 62.5 g of 2,4′-diphenylmethane diisocyanate under nitrogen protection, 0.1 g of the compound of stannous octoate and bismorpholine diethyl ether in a mass ratio of 1:1, and under the condition of 85~95°C, React for 45 min. Under the protection of nitrogen, add 2.4g of 1.6-hexanediol and 2g of 3-trimethoxysilylpropyl isocyanurate, stir at 85~95°C for 1 hour and discharge the material, and put the above prepolymer under nitrogen Discharge under protection and seal the package, and ripen at 85°C for 6 hours to...

Embodiment 3

[0029] Install a thermometer, mechanical stirring, condenser and nitrogen inlet tube on a 1000mL four-necked flask, weigh polytetrahydrofuran ether glycol (number average molecular weight 2000) 160g, poly(ethylene terephthalate) glycol (number average molecular weight 4000) 16g, C 5 -C 9 Petroleum resin 32g, antioxidant 1010 0.32g, phthalimide 0.08g, then heated to 120-140°C, stirred and mixed, and degassed under reduced pressure for 2 hours (absolute pressure 300Pa), cooled to 90°C; nitrogen protection Add 16 g of 2,2′-diphenylmethane diisocyanate, 0.08 g of the mixture of stannous octoate and bismorpholine diethyl ether at a mass ratio of 1:1, and react for 45 minutes at 85~95°C . Under the protection of nitrogen, add 1.6g of glycerin and 4g of 3-ureapropyltriethoxysilane, stir and react at a high speed at 85~95°C for 1 h to discharge, and discharge the above prepolymer under the protection of nitrogen and seal the package. Aged at 85°C for 6 hours to obtain the product, ...

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Abstract

The invention discloses a preparation method for a silane-modified moisture-curable polyurethane hot melt adhesive. The method comprises the following steps: (1) heating and mixing polyester polyol, polyether polyol, tackifying resin, an antioxidant and a fluorescent whitening agent at a certain temperature, performing reduced pressure degassing for 2 hours, and cooling to 90 DEG C; (2) adding isocyanate and a catalyst into a reaction system under the nitrogen protection, and reacting at 85-95 DEG C for 45 minutes; (3) adding a chain extender and a silane coupler under the nitrogen protection, and reacting at 85-95 DEG C for 1 hour to obtain a prepolymer; (4) transferring a reaction mixture into an aluminum foil bag under the nitrogen protection, sealing, and curing at 85 DEG C for 6 hours to obtain the silane-modified moisture-curable polyurethane hot melt adhesive with excellent performance.

Description

technical field [0001] The invention relates to a preparation method of a silane-modified moisture-curing polyurethane hot-melt adhesive, which is used to improve the poor wettability of conventional moisture-curing polyurethane hot-melt adhesives to substrates with low surface energy and chemically treated waterproof fabrics, resulting in adhesion effects bad question. Background technique [0002] Polyurethane hot melt adhesive has 100% solid content, does not discharge solvents into the environment, has no pollution to the environment, and is non-toxic to the human body. It is a green and environmentally friendly adhesive that meets the three requirements of "environmental protection, health, and safety" and has no drying Process, less energy consumption, easy operation, can be used in high-speed continuous production lines, improve production efficiency and a series of incomparable advantages, becoming an increasingly important type of adhesive in the field of adhesives....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J11/06C08G18/66C08G18/48C08G18/42C08G18/32
Inventor 李哲龙朱万育马洪伟曾作祥
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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