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High initial viscosity one-component moisture-curing reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot melt adhesive and moisture curing technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc., can solve the problem of affecting the wettability of the adhesive on the bonding surface and affecting the bonding strength And other issues

Active Publication Date: 2021-10-08
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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  • High initial viscosity one-component moisture-curing reactive polyurethane hot melt adhesive and preparation method thereof
  • High initial viscosity one-component moisture-curing reactive polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 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 Diol 208kg, polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol 92kg, polyadipate-1,6-hexanediol ester diol 50kg, polyether diol 100kg, antioxidant 10100.5kg, phosphoric acid with a mass ratio of 1:1, 0.1kg of polyphosphoric acid compound, N-methylmorpholine 1kg, silane coupling agent KH-5605.0kg, the polyether diol used in this embodiment The number average molecular weight 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, 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, and...

Embodiment 2

[0035] 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, and 150 kg of polyadipate-neopentyl glycol ester Diol 400kg, polyadipate-aromatic acid-diethylene glycol-ethylene glycol ester diol 260kg, polyadipate-1,6 hexanediol ester diol 160kg, polyether diol 120kg, antioxidant 10101.5kg, phosphoric acid with a mass ratio of 5:1, 0.5kg of polyphosphoric acid compound, 3kg of triethylenediamine, silane coupling agent KH-5705.0kg, the number average of the polyether diol used in this embodiment The molecular weight is 3000, the number average molecular weight of polyadipate-diethylene glycol-neopentyl glycol ester diol is 2000, the molar ratio of diethylene glycol to neopentyl glycol is 1:1, polyadipate-neopentyl glycol The number average molecular weight of glycol ester diol is 2000, and the number average molecular weight of polyadipate-aromatic acid-diethyl...

Embodiment 3

[0038] Weigh each raw material according to the following mass: diphenylmethane-4,4'-diisocyanate 88kg, polyadipate-diethylene glycol-neopentyl glycol ester diol 30kg, polyadipate-neopentyl glycol Diol 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, N-methylmorpholine 0.5kg, silane coupling agent KH-560 5.0kg, 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-diethylene glycol-ethylene ...

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Abstract

The invention relates to the technical field of polyurethane hot-melt adhesives, in particular to a high initial viscosity one-component moisture-curing reactive polyurethane hot-melt adhesive and a preparation method thereof. The content is 1.1%~3.0%, including the reaction product of the following raw materials in parts by weight: 10-35 parts of isocyanate, 5-20 parts of polyadipate-diethylene glycol-neopentyl glycol ester diol, polyadipate ‑Neopentyl glycol ester diol 10‑40 parts, polyadipate‑aromatic acid‑diethylene glycol‑ethylene glycol ester diol 10‑50 parts, polyadipate‑1,6 hexanediol ester diol 5-30 parts, polyether diol 10-50 parts, antioxidant 0.05-0.5 parts, stabilizer 0.01-0.1 parts, catalyst 0.1-0.5 parts, adhesion promoter 0.1-1 parts. The preparation method of the high initial viscosity one-component moisture-curing reactive polyurethane hot melt adhesive of the present invention is simple, and the prepared polyurethane hot melt adhesive has higher initial adhesive effect, wettability and later sticking force.

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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Patent Type & Authority Patents(China)
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