Polyurethane rework adhesive and preparation method thereof

A heavy-duty adhesive and polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of removing LOCA residual adhesive, etc., and achieve improved rework yield, excellent elasticity, and good bonding sexual effect

Active Publication Date: 2019-08-16
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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  • Polyurethane rework adhesive and preparation method thereof
  • Polyurethane rework adhesive and preparation method thereof
  • Polyurethane rework adhesive 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 rework adhesive and a preparation method thereof. The polyurethane rework adhesive mainly comprises 100 parts of a silylated polyurethane prepolymer, 10-26 partsof a filler, 3-4.5 parts of a crosslinking agent, 0.2-0.35 part of a catalyst and 0.01-0.08 part of a water removal agent. The main chain of the polyurethane rework adhesive is a polyurethane structure, and the end group is a polyalkoxy group, so the adhesive has the advantages of high tensile strength, excellent elasticity, room temperature curing mechanism and good bonding strength, has good adhesion to LOCA residual adhesive, can be quickly cured at room temperature, allows the LOCA residual adhesive on the surface of a reworked touch screen to be quickly removed, and improves 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 Applications(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
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