A kind of no-cleaning glue-free line reactive polyurethane edge-sealing hot-melt adhesive and preparation method thereof

A reactive, polyurethane technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of inconsistent color and color of the adhesive layer, can not be exposed for a long time, affect the overall appearance, etc., to reduce molecular weight Active, guaranteed no-clean performance, high economic efficiency

Active Publication Date: 2022-07-12
上海路嘉胶粘剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, polyurethane hot-melt adhesives with better performance are widely used, but polyurethane hot-melt adhesives are moisture-curing reactive hot-melt adhesives. It is very difficult to use and requires constant cleaning, resulting in waste of hot melt adhesive
Moreover, the general PUR edge banding hot melt adhesive, after edge banding, the color of the glue layer is inconsistent with the color of the board, and there are obvious glue marks, which affects the overall appearance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] A second aspect of the present invention provides a preparation method of a no-cleaning glue-free reactive polyurethane edge-sealing hot-melt adhesive, comprising the following steps:

[0051] 1) adding polyester polyol to the reaction kettle, heating up to 80-90°C, reacting for 30-90 minutes, adding isocyanate, warming up to 100-110°C, reacting for 1-1.5 hours and then adding tackifying resin, stirring and reacting;

[0052] 2) Add inorganic particles, antioxidants, and damping agents to step 1), mix well, and detect the reaction end point with infrared spectroscopy, until no NCO can be detected (the absorption peak of the NCO group is 2226 cm) -1 ), the reaction ends, that is.

Embodiment 1

[0057] A no-cleaning glue-free line reactive polyurethane edge-sealing hot-melt adhesive, the raw materials for preparing, in parts by weight, include: 15 parts of 4,4'-diphenylmethane diisocyanate, 75 parts of polyester polyol, and 7 parts of rosin resin , 3 parts of inorganic particles, 1 part of antioxidant, 1.5 parts of silane coupling agent, and 0.8 part of damping agent.

[0058] 4,4'-Diphenylmethane diisocyanate, model MDI-100, was purchased from Yantai Wanhua Group Co., Ltd.

[0059] The polyester polyol is selected from polyester polyol with a weight average molecular weight of 2000 and polyester polyol with a weight average molecular weight of 3000, and the weight ratio is 1:1.8.

[0060] Polyester polyol with a weight average molecular weight of 2000, model DYNACOLL7362, was purchased from Chuangying Degussa, Germany; polyester polyol with a weight average molecular weight of 3000, model DYNACOLL7331, was purchased from Chuangying Degussa, Germany.

[0061] The ino...

Embodiment 2

[0071] A no-cleaning glue-free reactive polyurethane edge-sealing hot-melt adhesive, the specific implementation of which is the same as that of Example 1, and the difference from Example 1 is that the polyester polyol is selected from the polyester polyol with a weight average molecular weight of 2,000.

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Abstract

The invention belongs to the technical field of hot-melt adhesives, and more particularly relates to a non-cleaning and glue-free reactive polyurethane edge-sealing hot-melt adhesive and a preparation method thereof. A no-cleaning glue-free line reactive polyurethane edge-sealing hot-melt adhesive, the preparation raw materials include: isocyanate, polyester polyol, tackifying resin, inorganic particles, antioxidant and damping agent. The interaction between tackifying resin, isocyanate and polyester polyol with specific molecular weight, inorganic particles and damping agent added in this application can prolong the curing time of hot melt adhesive, reduce the molecular activity between reactants, and prolong the hot melt adhesive. The available time for the adhesive to be exposed to the air, thus ensuring the no-cleaning performance of the hot-melt adhesive, reducing the waste of the hot-melt adhesive, having higher economic benefits, and being suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of hot-melt adhesives, and more particularly relates to a non-cleaning and glue-free reactive polyurethane edge-sealing hot-melt adhesive and a preparation method thereof. Background technique [0002] Furniture edge banding adhesive is a kind of adhesive specially used for edge banding of artificial boards. It is a solvent-free thermoplastic adhesive. [0003] According to the different base materials, furniture edge sealing adhesive can be divided into EVA (ethylene-vinyl acetate copolymer resin) base material hot melt adhesive, POL YAMIDE (polyamide) base material hot melt adhesive, HMPU (polyurethane) base material hot melt adhesive . Generally, EVA hot melt adhesive is often used for edge sealing of furniture, which is low in cost and easy to use. However, as the market has higher and higher requirements for the quality of household products, there are higher requirements for the weather resistance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J11/04C09J11/08C09J11/06C08G18/42C08G18/76
CPCC09J175/06C09J11/04C09J11/08C09J11/06C08G18/4202C08G18/7671C08K2201/011C08K2003/2241C08L93/04C08K13/02C08K3/36C08K3/22C08K5/5425C08K5/5435Y02E10/50
Inventor 凌万青
Owner 上海路嘉胶粘剂有限公司
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