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No-clean glue-line-free reactive polyurethane edge-sealing hot melt adhesive and preparation method thereof

A reactive, polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of inconsistent color and color of the adhesive layer, cannot be exposed for a long time, difficult to operate and use, etc., to reduce molecular weight. Activity, ensure no-clean performance, improve the effect of reaction stability

Active Publication Date: 2021-06-11
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] The second aspect of the present invention provides a method for preparing no-cleaning and glue-free reactive polyurethane edge-sealing hot melt adhesive, comprising the following steps:

[0051] 1) Add polyester polyol into the reaction kettle, heat up to 80-90°C, react for 30-90 minutes, add isocyanate, heat up to 100-110°C, react for 1-1.5 hours, then add tackifying resin, stir to react;

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

Embodiment 1

[0057] A no-cleaning and glue-free reactive polyurethane edge-sealing hot-melt adhesive. The raw materials are prepared in parts by weight, including: 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 parts of damping agent.

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

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

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

Embodiment 2

[0071] A no-cleaning and glue-free reactive polyurethane edge-sealing hot-melt adhesive, its specific implementation method is the same as that of Example 1, except that the polyester polyol is selected from polyester polyols with a weight-average molecular weight of 2000.

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Abstract

The invention belongs to the technical field of hot melt adhesives, and particularly relates to a no-clean glue-line-free reactive polyurethane edge-sealing hot melt adhesive and a preparation method thereof. The a no-clean glue-line-free reactive polyurethane edge-sealing hot melt adhesive is prepared from the following raw materials: isocyanate, polyester polyol, tackifying resin, inorganic particles, an antioxidant and a damping agent. The interaction among the tackifying resin, the isocyanate, the polyester polyol with specific molecular weight, the inorganic particles and the damping agent added in the hot melt adhesive can prolong the curing time of the hot melt adhesive, reduce the molecular activity among reactants and prolong the usable time of the hot melt adhesive exposed in air, so that the no-clean performance of the hot melt adhesive is ensured, the waste of the hot melt adhesive is reduced, the economic benefit is higher, and the hot melt adhesive is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of hot-melt adhesives, and more specifically relates to a no-cleaning and glue-line-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 wood-based panels. It is a solvent-free thermoplastic adhesive. [0003] According to different base materials, furniture edge banding adhesive can be divided into EVA (ethylene-vinyl acetate copolymer resin) base hot melt adhesive, POL YAMIDE (polyamide) base hot melt adhesive, HMPU (polyurethane) base hot melt adhesive . Generally, EVA hot melt adhesive is 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 the edge banding board. Often t...

Claims

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Application Information

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Patent Type & Authority Applications(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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