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A kind of polyurethane heavy industry glue and preparation method thereof

A technology of heavy industrial glue and polyurethane, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of removing LOCA residual glue, etc., and achieve improved rework yield, high tensile strength, and excellent elastic effect

Active Publication Date: 2021-06-22
江苏矽时代材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few literature reports on the removal of LOCA residues

Method used

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  • A kind of polyurethane heavy industry glue and preparation method thereof
  • A kind of polyurethane heavy industry glue and preparation method thereof
  • A kind of polyurethane heavy industry glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0026] The components of the polyurethane heavy industry adhesives of Examples 1-7 and Comparative Examples 1-2 are shown in Table 1. The preparation method of embodiment 1~7 polyurethane heavy industry glue is:

[0027] (1) After mixing the silanized polyurethane prepolymer, pigments and fillers, and water-removing agent uniformly through a kneader, the excess water in the system is removed through high-temperature vacuum dehydration treatment;

[0028] (2) Move it into a planetary reactor and add a crosslinking agent under a vacuum of -0.085 to -0.095mpa and stir for 15 to 40 minutes; add a catalyst and continue to stir for 15 to 40 minutes; vacuumize to remove air bubbles and then pack to obtain polyurethane heavy industrial glue.

[0029] The structural formula of the silylated polyurethane prepolymer of the present invention is shown in (I) below:

[0030]

[0031] R in the formula can be one of methyl-terminated dialkoxy, methyl-terminated trialkoxy, phenyl-terminate...

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Abstract

The invention discloses a polyurethane heavy industry glue and a preparation method thereof. The polyurethane heavy industry glue mainly includes 100 parts of silanized polyurethane prepolymer, 10-26 parts of filler, 3-4.5 parts of cross-linking agent, 0.2-0.35 parts of catalyst, water removal 0.01 to 0.08 parts of the agent. The main chain of the polyurethane heavy industrial adhesive of the present invention is a polyurethane structure, the terminal group is polyalkoxy, has high tensile strength, excellent elasticity, room temperature curing mechanism and good bonding strength, and has good adhesion to LOCA residual glue. It has good adhesion and can be quickly cured at room temperature. At the same time, it can quickly remove the LOCA residue on the surface of the reworked touch screen, improving the rework yield of the touch screen.

Description

technical field [0001] The invention relates to the technical field of touch screen rework, in particular to a polyurethane heavy industry glue and a preparation method thereof. Background technique [0002] With the rapid development of electronic information industry and communication technology, electronic touch screens are more and more widely used in people's production and life. The touch screen consists of a display screen, a touch screen, and a protective panel from the inside to the outside. These three are bonded and bonded by liquid optical glue. Due to the different surface tension of the three materials, air bubbles, foreign objects or offsets often occur during the bonding process, resulting in defective products and requiring rework. In the rework process, it is very important to peel off the components and remove the LOCA residual glue. The LOCA residual glue mainly includes silicone, acrylic and polyurethane. There are very few literature reports on the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04
CPCC09J175/04
Inventor 黄雪冰柯明新
Owner 江苏矽时代材料科技有限公司