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Reactive adhesives and applications for difficulty and flexible materials

A flexible material and reactive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as unclean finished products, achieve yellowing and discoloration, excellent bending resistance, and good The effect of anti-yellowing performance

Active Publication Date: 2022-08-09
SUZHOU HI TECH ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When PUR is used, it is heated to a higher temperature (such as 130°C in this patent) to form a melt and coat it on the substrate to be bonded, which is similar to a liquid adhesive. Although the solvent and VOC problems are solved, there are still problems caused by the extrusion of the adhesive. Dirty handling of finished products

Method used

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  • Reactive adhesives and applications for difficulty and flexible materials
  • Reactive adhesives and applications for difficulty and flexible materials
  • Reactive adhesives and applications for difficulty and flexible materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A reactive adhesive for difficult-to-stick flexible materials, comprising the following components:

[0046]

[0047] The solid content of the aqueous polyurethane dispersion used therein is 60%, which contains crystalline polyester polyol, amorphous polyester polyol and aliphatic isocyanate. Among them, crystalline polyester polyol is Evonik 7361, Amorphous polyester polyol for Evonik 7111, the mass ratio of crystalline polyester polyol to amorphous polyester polyol is 100:30, the aliphatic isocyanate is IPDI, and the mass ratio of aliphatic isocyanate to crystalline polyester polyol is 35:100.

[0048] The reactive adhesive film is prepared by using the above-mentioned reactive adhesive. The reactive adhesive film is prepared by adding and stirring the above-mentioned formula raw materials in order to prepare glue. The obtained glue is coated on glassine paper and dried in an oven at 50°C for 10min. A reactive adhesive film with a thickness of 50 μm.

Embodiment 2

[0050] A reactive adhesive for difficult-to-stick flexible materials, comprising the following components:

[0051]

[0052] The solid content of the aqueous polyurethane dispersion used therein is 50%, which contains crystalline polyester polyol, amorphous polyester polyol and aliphatic isocyanate. Among them, crystalline polyester polyols are produced by Evonik 7360 and Huafon PE-3030 are composed of 1:1 mass ratio, amorphous polyester polyol is Evonik 7250, the mass ratio of crystalline polyester polyol and amorphous polyester polyol is 100:5, aliphatic isocyanate is composed of IPDI and HDI, and the mass ratio of IPDI / HDI is 2:1, aliphatic isocyanate and crystalline polyester polyol The mass ratio of alcohol was 15:100.

[0053] The reactive adhesive film is prepared by using the above-mentioned reactive adhesive. The reactive adhesive film is prepared by adding and stirring the above-mentioned raw materials in sequence to prepare glue. The obtained glue is coated o...

Embodiment 3

[0055] A reactive adhesive for difficult-to-stick flexible materials, comprising the following components:

[0056]

[0057]

[0058] The solid content of the aqueous polyurethane dispersion used therein is 40%, which contains crystalline polyester polyol, amorphous polyester polyol and aliphatic isocyanate. Among them, crystalline polyester polyols are produced by Evonik 7380 and Huafon PE-2811 are composed of 1:1 mass ratio, amorphous polyester polyol is Evonik 7130, the mass ratio of crystalline polyester polyol and amorphous polyester polyol is 100:18.5, aliphatic isocyanate is composed of IPDI and HDI, and the mass ratio of IPDI / HDI is 7:5, aliphatic isocyanate and crystalline polyester polyol The mass ratio of alcohol was 25:100.

[0059] The reactive adhesive film is prepared by using the above-mentioned reactive adhesive. The reactive adhesive film is prepared by adding and stirring the above-mentioned raw materials in sequence to form glue. The obtained glue...

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Abstract

The invention relates to a reactive adhesive for hard-to-stick flexible materials and applications thereof. The reactive adhesive for hard-to-stick flexible materials comprises the following components by weight: 100 parts of aqueous polyurethane dispersion; vinyl acetate-ethylene copolymer 10-30 parts of VAE emulsion; 5-20 parts of latent curing agent; 0.5-2 part of anti-hydrolysis stabilizer; 0.1-0.5 part of thickener; 0.05-0.2 part of wetting and dispersing agent BYK151; Including crystalline polyester polyols, amorphous polyester polyols and aliphatic isocyanates and other main chemical composition structures, and containing amino groups (‑NH 2 or ‑NH‑) and hydroxyl (‑OH) reactive groups. The adhesive film made of the reactive adhesive for the difficult-to-stick flexible material of the present invention can quickly realize the bonding of the difficult-to-stick flexible material at 90-110° C., the bonding strength is high, and the bonded difficult-to-stick flexible material is resistant to bending And resistant to yellowing.

Description

technical field [0001] The invention relates to an adhesive, in particular to a reactive adhesive for difficult-to-stick flexible materials and its application. Background technique [0002] As people pay attention to quality of life and health data, the demand for consumer electronics such as wearable devices is growing rapidly. In terms of material selection, since the materials used in wearable devices are in direct contact with human skin, they need to have the characteristics of safety, breathability, durability, comfort, flexibility, softness and good fit. Therefore, the commonly used materials for wearable devices are: Silicone, thermoplastic polyurethane elastomer (TPU), synthetic rubber elastomer (TPE) and other difficult-to-stick flexible materials. As a hard-to-stick flexible material, the bonding between the above-mentioned materials themselves or with other materials is also a difficulty that needs to be solved urgently at the manufacturing end of the finished ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J131/04C09J11/06C09J11/08C09J7/30C09J7/10
CPCC09J175/06C09J11/06C09J11/08C09J7/30C09J7/10C08L2205/02C08L2205/035C08L2201/08C09J2475/00C09J2431/00C08L31/04C08L75/04C08K5/29
Inventor 范仁祥
Owner SUZHOU HI TECH ELECTRONICS CO LTD