Polyurethane adhesive, PU protective film and preparation method and application of PU protective film

A polyurethane adhesive and protective film technology, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problem of high surface resistance of PU protective film, high requirements for production conditions, poor electrostatic conduction effect, etc. question

Inactive Publication Date: 2021-01-22
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the PU protective film prepared by this technology has a low and stable tearing voltage, this technology requires high production conditions, and the prepared PU protective film has high surface resistance and poor electrostatic conduction effect.

Method used

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  • Polyurethane adhesive, PU protective film and preparation method and application of PU protective film
  • Polyurethane adhesive, PU protective film and preparation method and application of PU protective film
  • Polyurethane adhesive, PU protective film and preparation method and application of PU protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102]This implementation provides a polyurethane adhesive, including the following components by weight:

[0103]

[0104]Among them, the antistatic agent is composed of lithium bistrifluoromethanesulfonimide and tetrakis(hydroxymethyl)phosphorus sulfate in a mass ratio of 1:1.

[0105]The above polyurethane prepolymer solution is prepared from the following raw materials:

[0106]

[0107]The preparation method of the above polyurethane prepolymer solution is as follows:

[0108]A: Mix polyether polyol (DP4000E), polyester polyol, hexamethylene diisocyanate, organotin catalyst and toluene, and perform prepolymerization reaction at 75°C to obtain a mixed solution;

[0109]B: Mix the mixed solution obtained in step A, polycarbonate polyol and toluene, and carry out a chain extension reaction at 90° C. to obtain a polyurethane prepolymer solution with a solid content of 60%.

Embodiment 2

[0111]This embodiment provides a polyurethane adhesive, which includes the following components in parts by weight:

[0112]

[0113]

[0114]Among them, the antistatic agent is composed of lithium bistrifluoromethanesulfonimide and tetrakis(hydroxymethyl)phosphorus sulfate in a mass ratio of 1:1.

[0115]The above polyurethane prepolymer solution is prepared from the following raw materials:

[0116]

[0117]The preparation method of the polyurethane prepolymer solution described above is compared with Example 1, except that the content of each raw material is as described above, and a polyurethane prepolymer solution with a solid content of 60% is obtained.

Embodiment 3

[0119]This embodiment provides a polyurethane adhesive, which includes the following components in parts by weight:

[0120]

[0121]Among them, the antistatic agent is composed of lithium bistrifluoromethanesulfonimide and tetrakis(hydroxymethyl)phosphorus sulfate in a mass ratio of 1:1.

[0122]The aforementioned polyurethane prepolymer solution includes the following components in parts by weight:

[0123]

[0124]

[0125]The preparation method of the polyurethane prepolymer solution described above is compared with Example 1, except that the content of each raw material is as described above, and a polyurethane prepolymer solution with a solid content of 50% is obtained.

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Abstract

The invention provides a polyurethane adhesive, a PU protective film as well as a preparation method and application of the PU protective film. The polyurethane adhesive is prepared from the followingcomponents in parts by weight: 50-70 parts of a polyurethane prepolymer, 7-16 parts of a curing agent, 0.2-7 part of an antistatic agent, 0.2-3.5 parts of a surfactant and 0.1-1 part of a catalyst. The PU protective film comprises a base material layer and a polyurethane adhesive layer which are attached to each other, and the polyurethane adhesive layer is formed by the polyurethane adhesive. The preparation method of the PU protective film comprises the following steps: (1) mixing a polyurethane adhesive with a solvent to obtain a mixed solution; and (2) coating the mixed solution obtainedin the step (1) on a base material layer, and drying and curing the mixed solution to obtain the PU protective film. The PU protective film provided by the invention has the advantages of low film tearing voltage, low viscosity and no residual glue, and meets the market use requirements.

Description

Technical field[0001]The invention relates to the technical field of protective films, in particular to a polyurethane adhesive, a PU protective film, and a preparation method and application thereof.Background technique[0002]In recent years, domestic glass manufacturers have risen rapidly, replacing some of the imported glass from the US and Japan. The terminal screen manufacturers use protective films with domestic glass to test the tear-off voltage data far exceeding imported glass, but most of the protective films on the market cannot meet the requirements. Special domestic glass tear film voltage test requirements. If the tearing voltage of the protective film is too high, it will break down the touch sensor, and it will be accompanied by abnormal problems such as the electrical performance of the touch screen during the shipment test. The touch yield rate is low. Therefore, a stable and low tearing voltage has been developed And the protective film without residual glue is of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06C09J11/04C08G18/48C08G18/44C08G18/42C08G18/12C09J7/30C09J7/25C09J7/24
CPCC09J175/04C09J11/06C09J11/04C08G18/4018C08G18/48C08G18/42C08G18/12C09J7/30C09J7/255C09J7/25C09J7/243C08K2201/017C09J2467/006C08G18/44C08K5/44C08K5/50C08K3/041
Inventor 李阜阳陈炼茅琦朱玲玲陈洪野吴小平
Owner CYBRID TECHNOLOGIES INC
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