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One-component moisture curing reaction type polyurethane hot melt adhesive with high initial viscosity and preparation method thereof

A polyurethane hot-melt adhesive, moisture curing technology, applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc., can solve the problem of affecting the bonding strength and the wettability of the adhesive to the bonding surface and other problems, to achieve the effect of improving initial viscosity, increasing stability and good wettability

Active Publication Date: 2019-09-13
CHONGQING HANTUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of reactive polyurethane hot melt adhesives in the prior art is a process of combining physical blending and chemical reaction. Tackifying resins are used in the synthesis, and the use of tackifying resins will affect the wetting of the adhesive to the bonding surface. property, thus affecting the later bonding strength

Method used

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  • One-component moisture curing reaction type polyurethane hot melt adhesive with high initial viscosity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Weigh each raw material according to the following mass: diphenylmethane-4,4-diisocyanate 100kg, polyadipate-diethylene glycol-neopentyl glycol ester diol 50kg, polyadipate-neopentyl glycol ester diol Alcohol 208kg, polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol 92kg, polyadipate-1,6 hexanediol ester diol 50kg, polyether diol 100kg, antioxidant 1010 0.5kg, 0.1kg of phosphoric acid and polyphosphoric acid compound with a mass ratio of 1:1, 1kg of N-methylmorpholine, 5.0kg of silane coupling agent KH-560, the polyether diol used in this example The number average molecular weight of polyadipate-diethylene glycol-neopentyl glycol ester diol is 3500, the molar ratio of diethylene glycol and neopentyl glycol is 1:4, polyadipate -The number-average molecular weight of neopentyl glycol ester diol is 2000, and the number-average molecular weight of polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol is 5500, wherein the mole of adipic a...

Embodiment 2

[0044] Weigh each raw material according to the following mass: 100 kg of 4,4-dicyclohexylmethane diisocyanate, 150 kg of polyadipate-diethylene glycol-neopentyl glycol ester diol, 150 kg of polyadipate-neopentyl glycol ester diol Alcohol 400kg, polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol 260kg, polyadipate-1,6 hexanediol ester diol 160kg, polyether diol 120kg, antioxidant 10101.5 kg, phosphoric acid with a mass ratio of 5:1, 0.5 kg of polyphosphoric acid compound, 3 kg of triethylenediamine, 5.0 kg of silane coupling agent KH-570, the number average molecular weight of the polyether diol used in this example is 3000, the number average molecular weight of polyadipate-diethylene glycol-neopentyl glycol is 2000, the molar ratio of diethylene glycol and neopentyl glycol is 1:1, polyadipate-neopentyl glycol The number-average molecular weight of alcohol ester diol is 2000, and the number-average molecular weight of polyadipate-aromatic acid-diethylene g...

Embodiment 3

[0047] Weigh each raw material according to the following quality: diphenylmethane-4,4-diisocyanate 88kg, polyadipate-diethylene glycol-neopentyl glycol ester diol 30kg, polyadipate-neopentyl glycol ester diol Alcohol 110kg, polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol 92kg, polyadipate-1,6 hexanediol ester diol 70kg, polyether diol 100kg, antioxidant 1010 0.5kg, phosphoric acid with a mass ratio of 5:1, 0.1kg of polyphosphoric acid compound, 0.5kg of N-methylmorpholine, 5.0kg of silane coupling agent KH-560, the polyether binary used in this example The number average molecular weight of alcohol is 3000, the number average molecular weight of polyadipate-diethylene glycol-neopentyl glycol ester diol is 3500, the molar ratio of diethylene glycol and neopentyl glycol is 1:4, polyhexamethylene glycol The number average molecular weight of acid-neopentyl glycol ester diol is 2000, and the number average molecular weight of polyadipate-aromatic acid-dieth...

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Abstract

The invention relates to the technical field of polyurethane hot melt adhesives, especially to a one-component moisture curing reaction type polyurethane hot melt adhesive with high initial viscosityand a preparation method thereof. The NCO% content of the one-component moisture curing reaction type polyurethane hot melt adhesive with high initial viscosity is 1.1-3.0%. The one-component moisturecuring reaction type polyurethane hot melt adhesive with high initial viscosity comprises the following raw materials (by weight): 10-35 parts of isocyanate, 5-20 parts of polyadipic acid-diglycol-neopentyl glycol ester glycol, 10-40 parts of polyadipic acid-neopentyl glycol ester glycol, 10-50 parts of polyadipic acid-aromatic acid-diglycol-gylcol ester glycol, 5-30 parts of polyadipic acid-1,6-hexylene glycol ester glycol, 10-50 parts of polyether glycol, 0.05-0.5 part of an antioxidant, 0.01-0.1 part of a stabilizer, 0.1-0.5 part of a catalyst, and 0.1-1 part of an adhesion promoter. Thepreparation method of the one-component moisture curing reaction type polyurethane hot melt adhesive with high initial viscosity is simple, and the prepared polyurethane hot melt adhesive has higher initial viscosity, wetability and late adhesion.

Description

technical field [0001] The invention relates to the technical field of polyurethane hot-melt adhesives, in particular to high initial viscosity single-component moisture-curing reactive polyurethane hot-melt adhesives and a preparation method thereof. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain, and materials containing active hydrogen, such as foam plastics, wood, leather, fabrics, paper Porous materials such as , ceramics, and materials with smooth surfaces such as metal, glass, rubber, and plastic have excellent chemical adhesion. With the increasingly stringent environmental protection requirements, traditional organic solvent-based adhesives are gradually eliminated, and the development of hot-melt and water-based adhesives is turned. Therefore, vigorously developing environmentally friendly hot-melt and water-based polyurethane adhesives has become the ...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C08G18/42C08G18/48C08G18/76C08G18/75C08G18/08
CPCC08G18/08C08G18/4018C08G18/4202C08G18/4238C08G18/425C08G18/4825C08G18/758C08G18/7621C09J175/06C09J175/08C08K5/5435C08K5/5425
Inventor 罗斌刘立忠
Owner CHONGQING HANTUO TECH CO LTD