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Moisture cured reaction type polyurethane hot melt adhesive and preparation technique thereof

A polyurethane hot-melt adhesive, moisture curing technology, applied in the direction of adhesive additives, polymer adhesive additives, etc., can solve the problems of affecting the bonding effect, uneven molecular weight distribution, curing, etc., to extend the usable time, The effect of improving storage stability and improving viscosity stability

Inactive Publication Date: 2017-02-22
苏州孚霖工业品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The hot-melt adhesive produced by the existing technology and process generally has the phenomenon that the polymerization reaction of the matrix resin is not complete, or a large number of side reactions lead to irregular molecular structure and uneven molecular weight distribution of the hot-melt adhesive. The structure is unstable, and there are large differences in the indicators and actual application results between batches. During the storage and use of hot melt adhesives, the colloids continue to undergo chemical reactions, resulting in poor storage stability of hot melt adhesives, and continue to react during high temperature use. , the viscosity rises rapidly or even solidifies in a short time, thus affecting the final bonding effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Calculated on the basis of 100Kg of the total amount of materials, 25Kg of polyester polyol, 34Kg of polyether polyol, 10Kg of thermoplastic acrylic resin, 15Kg of EVA, and 3Kg of terpene phenolic resin were stirred and dehydrated at 140°C for 2 hours in a molten state, and then cooled to 60°C. Add 11Kg of molten MDI, react for 30 minutes, then heat up to 80°C, react for 1 hour under vacuum, then heat up to 100°C, react for 1 hour under vacuum, then heat up to 120°C for 1 hour, then pass Add 1Kg of catalyst DMDEE and 1Kg of coupling agent KH560, stir evenly under vacuum, and then discharge and pack.

[0017] This embodiment is mainly used for bonding the screen frame structure of electronic products, mainly bonding polycarbonate and glass substrates, and has (the following are the characteristics that hot melt adhesives in this application range should have) high storage stability, and can be used at high temperatures. It has the advantages of high viscosity stability, ...

Embodiment 2

[0021] According to the total amount of material 100Kg, 35Kg of polyester polyol, 25Kg of polyether polyol, 18.5Kg of TPU resin, 2Kg of nano-calcium carbonate, and 2Kg of terpene resin were stirred and dehydrated at 140°C for 2 hours in a molten state, and then cooled to 60°C. ℃, add 15Kg of molten MDI, react under vacuum for 30 minutes, then heat up to 80°C, react under vacuum for 1 hour, then heat up to 100°C, react under vacuum for 1 hour, then heat up to 130°C and react for 1 hour Hours, then add 1Kg catalyst DMDEE, 1.5Kg silane coupling agent KH550, stir evenly under vacuum, and then discharge and pack.

[0022] This embodiment is mainly used for aluminum profiles coated with PVC film, and has the advantages of high viscosity stability, high initial adhesion, and high bonding strength.

[0023] The table below records the test data of the same formulation under different process conditions.

[0024] Example 1 Example 2 Example 3 Example 4 Example 5 E...

Embodiment 3

[0026] According to the total amount of material 100Kg, 30Kg of polyester polyol, 25Kg of polyether polyol, 13Kg of TPU, 15Kg of EVA, and 5Kg of white carbon black were stirred and dehydrated at 140°C for 2 hours in a molten state, and then cooled to 60°C. Add 11.5Kg of molten isocyanate, react for 30 minutes, then heat up to 80°C, react under vacuum for 1 hour, then heat up to 100°C, react under vacuum for 1 hour, then heat up to 130°C for 1 hour, then Add 0.5Kg catalyst DMDEE, stir evenly, and then discharge and pack.

[0027] This embodiment is mainly used for wood bonding, and has the advantages of high viscosity stability, high initial adhesion, and strong adhesion.

[0028] The table below records the test data of the same formulation under different process conditions.

[0029] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Input MDI temperature (°C) 70 70 70 50 50 50 60 60 60 Reac...

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PUM

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Abstract

The invention relates to a moisture cured reaction type polyurethane hot melt adhesive and a preparation technique thereof. The moisture cured reaction type polyurethane hot melt adhesive mainly contains polyester polyol, polyether polyol, thermoplastic polymer resin, isocyanate MDI, tackifying resin, padding, catalyst and coupling reagent. The components can have a polymerization reaction under a specific technical condition, so as to generate the moisture cured reaction type polyurethane hot melt adhesive with excellent performance. The moisture cured reaction type polyurethane hot melt adhesive is characterized in that the components by weight percent are as follows: 25%-35% of polyester polyol, 25%-35% of polyether polyol, 25%-35% of thermoplastic polymer resin, 10%-20% of isocyanate MDI, 1%-3% of tackifying resin, 1%-5% of padding, 0.5%-1% of catalyst and 0-3% of coupling reagent. Compared with the same formula under different reaction technical conditions, the moisture cured reaction type polyurethane hot melt adhesive generated under the technical condition provided by the invention has the advantages of tiny difference between different batches, performance stability, strong adhesive force and excellent viscosity stability in a gluing process.

Description

technical field [0001] The invention relates to the field of chemical products, in particular to a moisture-curing reactive polyurethane hot-melt adhesive and a manufacturing process thereof. Background technique [0002] The relationship between human beings and chemical industry is very close. In modern life, chemical products are inseparable almost anytime and anywhere. From material life such as clothing, food, housing, and transportation to spiritual life such as culture, art, and entertainment, chemical products are required to serve them. . Some chemical products play an epoch-making important role in the history of human development. Their production and application even represent a certain historical stage of human civilization. [0003] Reactive hot-melt adhesive bonding is to use a hot-melt adhesive machine to melt the hot-melt adhesive into a liquid through heat, and apply professional equipment to the surface of the adherend by scraping, roller coating, etc., ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/08C08G18/48C08G18/42
CPCC08G18/4018C08L2205/03C08L2205/035C08L2207/04C09J11/08C09J175/04C08L33/00C08L23/0853C08L61/06C08L101/00C08L45/00
Inventor 苏永锋朱涛王秀莲
Owner 苏州孚霖工业品科技有限公司
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