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Polyurethane hot melt adhesive, preparation method and application method thereof

A polyurethane hot-melt adhesive and polyester polyol technology, which is applied in adhesives, non-polymer adhesive additives, non-polymer organic compound adhesives, etc., can solve the problems of poor flame retardancy and achieve strong weather resistance, Good toughness and high initial bond strength

Active Publication Date: 2021-12-03
SHANGHAI ZHIGUAN HIGH POLYMER MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a polyurethane hot melt adhesive and its preparation method, which is used to solve the problem of poor flame retardancy of reactive hot melt polyurethane adhesives in the prior art

Method used

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  • Polyurethane hot melt adhesive, preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Weigh 50.00 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 2000, 37.50 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 3000, and polytetramethylene ether diol with a molecular weight of 2000. Add 50.00g of alcohol and 1.86g of antioxidant 1010 into a 1L three-necked flask, heat and stir at 110-120°C for 60min under vacuum dehydration, and the absolute pressure is less than 100Pa.

[0052] (2) Release the vacuum, add 9.30g tackifier polyacrylic acid resin, dilute monomer tetrahydrofuran acrylate 10.05g, ethoxyethyl acrylate 4.32g, and vacuumize at 110-120°C for 60min, the absolute pressure is less than 100 Pa.

[0053] (3) Cool down to 80°C, release the vacuum, add 44.42g of 4,4'-diphenylmethane diisocyanate (MDI) and 1.86g of catalyst dibutyltin dilaurate, stir, and the absolute pressure is less than 100Pa, the reaction temperature is 85- React at 95°C for 60 minutes;

[0054] (4) Release the vacuum, add 3.56g of reactive...

Embodiment 2

[0058] (1) Weigh 50.00 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 2000, 41.25 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 3000, and polytetramethylene ether diol with a molecular weight of 2000. Add 45.00g of alcohol and 1.92g of No. 1010 antioxidant into a 1L three-necked flask, and heat and stir at 110-120°C for 60min in vacuum dehydration, and the absolute pressure is less than 100Pa.

[0059] (2) Release the vacuum, add 19.20g tackifier polyacrylic resin, dilute monomer tetrahydrofuran acrylate 9.56g, ethoxyethoxyethyl acrylate 7.45g, and vacuumize at 110-120°C for 60min, The absolute pressure is less than 100Pa.

[0060] (3) Cool down to 80°C, release the vacuum, add 50.45g of 4,4'-diphenylmethane diisocyanate (MDI), 1.92g of dibutyltin dilaurate as a catalyst, and stir. React at 95°C for 60 minutes;

[0061] (4) Release the vacuum, add 5.90g of reactive flame retardant PADE with number average molecular weight of 560 a...

Embodiment 3

[0065] (1) Weigh 50.00 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 2000, 45.00 g of polyhexamethylene 1,4-succinate diol with a molecular weight of 3000, and polytetramethylene ether diol with a molecular weight of 2000. Add 55.00g of alcohol and 2.07g of No. 1010 antioxidant into a 1L three-neck flask, heat and stir at 110-120°C for 60min in vacuum dehydration, and the absolute pressure is less than 100Pa.

[0066] (2) Release the vacuum, add tackifier polyacrylic acid resin 12.74g, dilute monomer tetrahydrofuran acrylate 10.45g, ethoxyethoxyethyl acrylate 10.30g, and vacuumize at 110-120°C for 60min, The absolute pressure is less than 100Pa.

[0067] (3) Cool down to 80°C, release the vacuum, add 52.22g of 4,4'-diphenylmethane diisocyanate (MDI), 2.07g of dibutyltin dilaurate as a catalyst, stir, and the absolute pressure is less than 100Pa, the reaction temperature is 85- React at 95°C for 60 minutes;

[0068] (4) Release the vacuum, add 4.81g of ...

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Abstract

The invention provides a polyurethane hot-melt adhesive and its preparation method and use method. The polyurethane hot-melt adhesive includes main materials and auxiliary materials; the main materials include polyester polyol, polyether polyol, reactive flame retardant, isocyanate, The chain extender; the auxiliary material is selected from one or more of physical modifiers, catalysts, silane coupling agents, photoinitiators, antioxidants and white carbon black. Aiming at the disadvantage of poor flame retardancy of reactive hot-melt polyurethane adhesive (HMPUR), the present invention adopts chemical grafting and physical blending of phosphonate diol flame retardant and polyurethane adhesive to modify the moisture-curing polyurethane hot-melt adhesive , developed a flame-retardant light-wet dual-cure polyurethane hot-melt adhesive product with good flame retardancy, high initial bond strength, good toughness, strong weather resistance and easy construction.

Description

technical field [0001] The invention relates to a hot-melt adhesive, in particular to a polyurethane hot-melt adhesive and a preparation method thereof. Background technique [0002] Reactive hot-melt polyurethane adhesives (HMPUR) have become a research hotspot in the field of adhesives, and are widely used in footwear, furniture, automobiles, electronics and other industries due to their excellent environmental protection, temperature resistance and excellent adhesive properties. [0003] With the improvement of people's safety awareness, the research and development of HMPUR flame retardant products has been intensified. In order to reduce the flammability of the product, additive flame retardants or reactive flame retardants can be introduced into the polymer matrix of HMPUR. Due to the migration of additive flame retardants and their low compatibility with the substrate, the use of additive flame retardants often leads to a decrease in the mechanical properties and adh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/06C09J4/02C09J11/08C09J11/04C08G18/66C08G18/42C08G18/48C08G18/32
CPCC08G18/3206C08G18/4018C08G18/4202C08G18/4238C08G18/4854C08G18/6607C09J4/06C09J11/04C09J11/08
Inventor 曾作祥逯召勇张威薛为岚秦平王伟
Owner SHANGHAI ZHIGUAN HIGH POLYMER MATERIAL CO LTD