Hot melt polyurethane adhesive for bonding honeycomb panel and preparation method of hot melt polyurethane adhesive

A hot-melt polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of long initial bond strength and long open time, and achieve excellent initial bond force, excellent final The effect of bond strength and good adhesion

Pending Publication Date: 2019-10-18
佛山市顺德区蓝德堡实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for general adhesives to achieve outstanding initial bond strength and maintain a long open time at the same time (the two are contradictory)

Method used

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  • Hot melt polyurethane adhesive for bonding honeycomb panel and preparation method of hot melt polyurethane adhesive
  • Hot melt polyurethane adhesive for bonding honeycomb panel and preparation method of hot melt polyurethane adhesive
  • Hot melt polyurethane adhesive for bonding honeycomb panel and preparation method of hot melt polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of the hot-melt polyurethane adhesive, comprising the steps of:

[0026] 1) Put the crystalline polyester polyol with a molecular weight of 500 and rosin acid in a molar ratio of 1:1.05 (adjustable according to requirements) in a reaction kettle, heat it to 210°C under the protection of nitrogen, and dehydrate until the acid value is less than 2.0. During the reaction process, nitrogen protection is used and a high vacuum is used for rapid dehydration. After the reaction is completed, the material is discharged in a molten state for use. The state of the product is a solid with a lower melting point. The molecular weight of the polymer in the present invention is 500, referred to as S -500;

[0027] 2) Add the prepared S-500, poly-1,4-butylene adipate (PBA-2000), EVA (molecular weight is about 100,000), wetting agent and anti-aging agent into the reactor respectively , heat to dissolve to a uniform state, then vacuum dehydrate for 40 minutes, add d...

Embodiment 2

[0032] A preparation method of the hot-melt polyurethane adhesive, comprising the steps of:

[0033] 1) Put the crystalline polyester polyol with a molecular weight of 1000 and rosin acid in a molar ratio of 1:1.05 (adjustable according to demand) in a reactor, heat to 220°C under nitrogen protection, and dehydrate until the acid value is less than 2.0. During the reaction process, nitrogen protection and high vacuum are used for rapid dehydration. After the reaction is completed, the material is discharged in a molten state for use. The state of the product is a solid with a low melting point. The molecular weight of the polymer in the present invention is between 1000, referred to as for S-1000;

[0034] 2) Add the prepared S-1000, poly-1,4-butylene adipate (PBA-2000), EVA (molecular weight is about 100,000), wetting agent and anti-aging agent into the reactor respectively , heat to dissolve to a uniform state, then vacuum dehydrate for 50 minutes, add diisocyanate at 100°C...

Embodiment 3

[0039] A preparation method of the hot-melt polyurethane adhesive, comprising the steps of:

[0040] 1) Put crystalline polyester polyol with a molecular weight of 1500 and rosin acid in a molar ratio of 1:1.05 (adjustable according to demand) in a reactor, heat to 240°C under nitrogen protection, and dehydrate until the acid value is less than 2.0. During the reaction process, use nitrogen protection and use high vacuum for rapid dehydration. After the reaction is completed, the material is discharged in a molten state for use. The state of the product is a solid with a low melting point. The molecular weight of the polymer in the present invention is between 2000, referred to as for S-2000;

[0041] 2) Add the prepared S-2000, poly-1,4-butylene adipate (PBA-2000), EVA (molecular weight is about 100,000), wetting agent and anti-aging agent into the reactor respectively , heat to dissolve to a uniform state, then vacuum dehydrate for 60 minutes, add diisocyanate at 110°C and ...

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Abstract

The invention discloses a hot melt polyurethane adhesive for bonding a honeycomb panel. The hot melt polyurethane adhesive is prepared from the following raw materials in percentage by mass: 40-50% ofpolymer polyols, 15-25% of modified rosin resin, 10-20% of EVA, 1-5% of an additive and 15-20% of polyisocyanate; the modified rosin resin is prepared by reacting linear even carbon polyols and adipic acid in different proportions to obtain polyester polyol with different molecular weights, and then esterifying the polyester polyol with rosin acid to obtain the modified rosin resin with the molecular weight of 500-1500; and the molecular weight of the EVA is 90,000-110,000. According to the hot melt polyurethane adhesive, the initial adhesive force is excellent, the opening time is appropriate, the adhesive force on a base material is good, and final adhesive strength is excellent.

Description

technical field [0001] The invention relates to a hot-melt polyurethane adhesive used for laminating honeycomb panels and a preparation method thereof, belonging to the field of adhesives. Background technique [0002] Paper honeycomb board is an effective way to reduce the weight of boards and make full use of leftover materials in wood processing. In order to adapt to the continuous production process, very high requirements are placed on the performance of the adhesive. It is difficult for general adhesives to achieve outstanding initial bond strength and maintain a long open time at the same time (the two are contradictory). In the past, this type of adhesive was a two-component solvent-based adhesive, such as the patent (publication number CN 109468114 A), this high-performance polyurethane adhesive includes A component and B component, A component and B component according to After mixing evenly with a mass ratio of 5:1, a high-performance polyurethane adhesive can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/68C08G18/62C08G18/42C08G63/91
CPCC09J175/14C08G18/686C08G18/6204C08G18/4238C08G18/4063C08G63/916
Inventor 熊峰
Owner 佛山市顺德区蓝德堡实业有限公司
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