A kind of preparation method of silane modified moisture curing polyurethane hot melt adhesive

A polyurethane hot melt adhesive and silane modification technology, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the limitation of the application field and development space of polyurethane melt adhesive products, and the inability of polyurethane hot melt adhesives Full response, low wettability of waterproof fabrics and other issues, to achieve the effect of improving washing and peeling resistance, improving van der Waals force, broadening application fields and development space

Active Publication Date: 2016-06-08
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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  • A kind of preparation method of silane modified moisture curing polyurethane hot melt adhesive
  • A kind of preparation method of silane modified moisture curing polyurethane hot melt adhesive
  • A kind of preparation method of silane modified moisture curing polyurethane hot melt adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] On the four-necked flask of 1000mL, a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet tube are installed, and 160 g of polyoxypropylene diol (number-average molecular weight 1000) and polyethylene adipate diol (number-average molecular weight 4000) are weighed. ) 45.25g, acrylic resin 60g, antioxidant 10100.64g, sodium distyryl biphenyl disulfonate 0.8g, then heated to 120-140°C, stirred and mixed, and degassed under reduced pressure for 2h (absolute pressure 100Pa), cooled to 90°C; under nitrogen protection, add 62.5g of 4,4′-diphenylmethane diisocyanate, 0.1g of the compound of stannous octoate and bismorpholine diethyl ether in a mass ratio of 1:1, at 85-95°C Next, react for 45min. Under the protection of nitrogen, 2.4 g of 1,4-butanediol was added, and the reaction was stirred at 85-95° C. for 1 h at high speed. The above prepolymer was discharged under the protection of nitrogen, sealed and packaged, and aged at 85°C for 6 hours to obtain the p...

Embodiment 2

[0029] Install a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet tube on a 1000mL four-necked flask, weigh polyethylene glycol (number average molecular weight 1250) 160g, polybutylene adipate diol (number average molecular weight 1000) 45.25g, phenolic resin 60g, antioxidant 10100.64g, 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; Under protection, add 62.5g of 2,4′-diphenylmethane diisocyanate, 0.1g of the compound of stannous octoate and bismorpholine diethyl ether in a mass ratio of 1:1, and react for 45min at 85-95°C . Under the protection of nitrogen, add 2.4g of 1.6-hexanediol, and 2g of 3-trimethoxysilylpropyl isocyanurate, stir and react at a high speed at 85-95°C for 1h and discharge the material, and put the above prepolymer under the protection of nitrogen Discharge and seal the package, and ripen at 85°C for 6 hours to obtain t...

Embodiment 3

[0031] On the 1000mL four-necked flask, a thermometer, a mechanical stirrer, a condenser and a nitrogen inlet tube are installed, and polytetrahydrofuran ether glycol (number-average molecular weight 2000) 160g, polyhexamethylene terephthalate glycol (number-average molecular weight 2000) are weighed 4000) 16g, C 5 -C 9 Petroleum resin 32g, antioxidant 10100.32g, phthalimide 0.08g, then heated to 120-140°C, stirred and mixed, while degassing under reduced pressure for 2h (absolute pressure 300Pa), cooled to 90°C; 16g of 2,2'-diphenylmethane diisocyanate, 0.08g of a compound of stannous octoate and bismorpholine diethyl ether in a mass ratio of 1:1, and reacted for 45 minutes at 85-95°C. Under the protection of nitrogen, add 1.6g of glycerin and 4g of 3-ureapropyltrimethoxysilane, stir and react at a high speed for 1h at 85-95°C and discharge the material, discharge the above prepolymer under the protection of nitrogen and seal the package. ℃ environment for 6 hours to obtain...

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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 on 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 Patents(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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