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PU protective film for display screen manufacturing process and preparation method of PU protective film

A protective film and display technology, applied in the direction of pressure-sensitive film/sheet, film/sheet-shaped adhesive, adhesive type, etc., can solve the problems of low peeling force, good air release, etc., and achieve low viscosity Climbing, good exhaust, low haze effect

Pending Publication Date: 2022-04-19
苏州世诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the protective film used in the OLED display packaging process prepared by the existing technology cannot combine the advantages of low peeling force rise, no precipitation residue, low peeling voltage, no glue overflow during laser cutting, and good exhaust performance.

Method used

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  • PU protective film for display screen manufacturing process and preparation method of PU protective film
  • PU protective film for display screen manufacturing process and preparation method of PU protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] PU protective film for display screen manufacturing process, from top to bottom is 25μm release film layer (double-sided antistatic, surface resistance value 10 6 Ω), 75μm polyurethane pressure-sensitive adhesive layer, 75μm PET substrate layer (one-sided antistatic PET, surface resistance value 10 8 Ω); the preparation method is as follows:

[0041] (1) Weigh 10 parts of ethyl ester, 5 parts of hexamethylene diisocyanate, 20 parts of perfluorobutyl ethyl alcohol (Shanghai Fluorine Technology, SF-000096), 0.01 part of stannous octoate (Shanghai Cao's Chemical Industry, T -9) Add to the reactor, slowly add 40 parts of hyperbranched polyester polyol (Perstorp, Boltorn H2004) dropwise at 80°C under a nitrogen atmosphere, at a rate of 50-60 drops per minute; , continue to react for 5h, titration test-NCO content is 0, stop the reaction to obtain organic fluorine modified hyperbranched polyester polyol;

[0042] (2) Mix 10 parts of organic fluorine-modified hyperbranched p...

Embodiment 2

[0045] PU protective film for display screen manufacturing process, from top to bottom is 25μm release film layer (double-sided antistatic, surface resistance value 10 6 Ω), 25μm polyurethane pressure-sensitive adhesive layer, 75μm PET substrate layer (one-sided antistatic PET, surface resistance value 10 8 Ω). The preparation method is as follows:

[0046] (1) Weigh 20 parts of ethyl ester, 18 parts of hexamethylene diisocyanate, 23 parts of perfluorobutyl ethyl alcohol (Shanghai Fluorine Technology, SF-000096), 0.017 parts of stannous octoate (Shanghai Cao’s Chemical Industry, T -9) Add to the reactor, slowly add 40 parts of hyperbranched polyester polyol (Perstorp, Boltorn H2004) dropwise at 80°C under a nitrogen atmosphere, at a rate of 50-60 drops per minute; , continue to react for 8h, titration test-NCO content is 0, stop the reaction, and obtain organic fluorine modified hyperbranched polyester polyol;

[0047] (2) Mix 10 parts by weight of organic fluorine-modified...

Embodiment 3

[0050] PU protective film for display screen manufacturing process, from top to bottom is 25μm release film layer (double-sided antistatic, surface resistance value 10 6 Ω), 75μm polyurethane pressure-sensitive adhesive layer, 75μm PET substrate layer (one-sided antistatic PET, surface resistance value 10 8 Ω). The preparation method is as follows:

[0051] (1) Weigh 8 parts of ethyl ester, 18 parts of hexamethylene diisocyanate, 35 parts of perfluoroalkyl alcohol polyoxyethylene ether (3MFC4430), 0.032 parts of stannous octoate (Shanghai Cao Chemical Industry, T-9) ( Shanghai Jide Chemical, TMG-129) was added into the reactor, and 40 parts of hyperbranched polyester polyol (Boltor, Boltor H311) was slowly added dropwise under nitrogen atmosphere at 80°C, with a dropping rate of 50-60 drops per Minutes; After the dropwise addition is completed, continue to react for 7h, titration test-NCO content is 0, stop the reaction, and obtain organic fluorine modified hyperbranched pol...

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Abstract

According to the PU protective film for the display screen manufacturing process and the preparation method of the PU protective film, a macromolecular chain is formed and a complex net-shaped structure is constructed through a grafting modification method, and a hyperbranched structure and a fluorine-containing structure are introduced into polyurethane, so that the prepared protective film has relatively good cohesion and relatively high peel strength; the advantages of low-viscosity climbing, no precipitation residue, good exhaust performance, no glue overflow in laser cutting and the like are achieved; allyl glycidyl ether is used as a monomer, anionic ring-opening polymerization and thiol-ene click reaction are utilized to introduce flexible alkyl into a side chain, alkyl functionalized poly (allyl glycidyl ether) in which an antistatic agent is added is prepared, the glass transition temperature of the PU protective film is reduced, the interaction of components in the PU protective film is enhanced, and the antistatic property of the PU protective film is improved. The toughness of the PU protective film can be obviously improved while the strength of the PU protective film is not lost, meanwhile, the surface resistivity of the PU protective film is effectively reduced, and more excellent aging precipitation resistance and antistatic effect are embodied.

Description

technical field [0001] The invention relates to the field of protective film preparation, in particular to a PU protective film for a display screen manufacturing process and a preparation method thereof. Background technique [0002] With the continuous development of electronic products, the application of protective films in the optical field is becoming more and more extensive. For example, flexible display panels have the advantages of high wiring density, light weight, and thin thickness; It is very difficult to develop the upper and lower protective films. The flexible substrate of OLED is very thin, lacks stiffness, and is easy to deform, which seriously affects the use experience and life of the panel. Therefore, in the actual production process, a protective film needs to be pasted on the upper and lower sides of the flexible screen for support. The role of protection; therefore, it is required that the protective film used has good adhesion and low viscosity clim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/38C09J175/04C09J9/02
CPCC09J7/255C09J7/38C09J175/04C09J9/02C09J2301/122C09J2301/302C09J2467/006C09J2475/00C09J2301/408C09J2301/314C08L71/02
Inventor 顾正青孟雪耿洪斌周奎任计建荣
Owner 苏州世诺新材料科技有限公司
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