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Inorganic nano photo-crosslinking promoter and nano composite photo-crosslinking EVA adhesive film as well as preparation method thereof

An inorganic nano- and nano-composite technology, applied in adhesives, flat products, adhesive additives, etc., can solve the problems of poor light transmission of IR holes or cursor holes, difficult to remove bubbles, and no light transmission, so as to achieve safety protection The effects of not being harsh, easy to operate, excellent mechanical properties and electrical properties

Active Publication Date: 2015-01-07
广州保均塑料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a traditional optical transparent adhesive, LOCA is often used for bonding touch screens and displays. Although LOCA has good bonding strength and can be cured at room temperature or medium temperature, for displays larger than 21 inches, use LOCA bonding still has the problem of difficult operation, not only is it difficult to remove air bubbles, but also there is often glue overflow during the bonding process of the display and touch screen, and the overflowing glue will flow into the IR hole or cursor hole on the mobile terminal In the transparent light hole, the IR hole or the cursor hole has poor or even no light transmittance
At the same time, the liquid LOCA also brings great difficulties to rework

Method used

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  • Inorganic nano photo-crosslinking promoter and nano composite photo-crosslinking EVA adhesive film as well as preparation method thereof
  • Inorganic nano photo-crosslinking promoter and nano composite photo-crosslinking EVA adhesive film as well as preparation method thereof
  • Inorganic nano photo-crosslinking promoter and nano composite photo-crosslinking EVA adhesive film as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-21

[0039] Prepare inorganic nano photocrosslinking accelerator as follows:

[0040] (1) Pre-dry an inorganic nanopowder in a vacuum box at 100-120°C for more than 4 hours, then weigh a certain amount (100g or less) of the inorganic nanopowder and put it into a 100ml anhydrous In a wide-mouthed bottle of ethanol, use ultrasonic dispersion for 10-30 minutes to obtain a powder-liquid mixture; then transfer the powder-liquid mixture to a four-necked flask, and stir evenly in a constant temperature water bath at 70-80°C. During the stirring process, pass Put the coupling agent mixed uniformly with absolute ethanol into the powder-liquid mixture drop by drop (the quality of the coupling agent is 1-3% of the mass of the inorganic nano-powder), and react for 3-5 hours to obtain the reaction mixture. . The anhydrous ethanol in the reaction mixture is removed by distillation under reduced pressure, and the reaction mixture after removing the solvent is placed in a vacuum oven at 100-120° ...

Embodiment 22

[0048] This embodiment provides a method for preparing an inorganic nano photocrosslinking accelerator, the preparation method is basically the same as that of Example 1, the only difference is: before mixing the inorganic nano powder with absolute ethanol, no drying treatment is performed, That is, directly weigh the inorganic nanopowder and put it into a jar filled with 100ml of absolute ethanol, and disperse it by ultrasonic wave for 10-30min to obtain a powder-liquid mixture. After obtaining the powder-liquid mixture, the follow-up operation is carried out according to the method of Example 1, and finally an inorganic nano-photocrosslinking accelerator is obtained, which is denoted as 22 .

Embodiment 23

[0050] This example provides a method for preparing an inorganic nano-photocrosslinking accelerator, which is basically the same as that of Example 1, except that the reaction mixture after solvent removal is dried in a vacuum oven at 100°C After 0.5h, the modified inorganic nanopowder was obtained. After obtaining the modified inorganic nano-powder, the subsequent operation is carried out according to the method of Example 1, and finally an inorganic nano-photocrosslinking accelerator is obtained, denoted as 23 .

[0051] Respectively apply the inorganic nano-photocrosslinking accelerator as prepared by the above-mentioned embodiment 1 -as 23 Prepare nanocomposite EVA film according to the following method, and the prepared EVA film is respectively marked as EVA 1 -EVA 23 .

[0052] Take respectively 12g of inorganic nano photocrosslinking accelerator, photoinitiator f 6 20g, fast crosslinker c 2 20g, multifunctional auxiliary crosslinking agent d 1 8g, graft coupling...

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Abstract

The invention relates to the technical field of disperse processing of inorganic nano materials and polymers, and in particular relates to an inorganic nano photo-crosslinking promoter and a preparation method thereof, and a nano composite photo-crosslinking EVA adhesive film and a preparation method thereof. The preparation method of the inorganic nano photo-crosslinking promoter comprises the following steps: modifying inorganic nano powder, and mixing the prepared modified organic nano powder with an auxiliary agent and a solvent to prepare the inorganic nano photo-crosslinking promoter; and the preparation method of the nano composite EVA film comprises the following steps: mixing the inorganic nano photo-crosslinking promoter with other auxiliary agents to prepare an auxiliary agent mixture, and then mixing the auxiliary agent mixture with EVA to prepare the nano composite EVA film by virtue of a tape-casting process. The prepared nano composite photo-crosslinking EVA adhesive film disclosed by the invention has excellent mechanical performance and electrical performance, is strong in weather resistance, high in light transmittance rate, small in volume shrinkage, simple in process equipment and less in investment, is easy to operate, cannot cause pollution to the environment, does not have harsh safety protection requirements, and has small radiation damage to EVA in a radiation process; and the nano composite EVA film can be used for conveniently adhering a display screen to a touch screen together, is convenient to rework, and also can be used for avoiding overflowing adhesives from blocking holes.

Description

technical field [0001] The invention relates to the technical field of inorganic nanometer materials and polymer dispersion processing, in particular to an inorganic nanophotocrosslinking accelerator and a preparation method thereof, a nanocomposite photocrosslinked EVA adhesive film and a preparation method thereof. Background technique [0002] In recent years, the photocrosslinking technology of polymers has developed rapidly and has become an important branch of polymer science and the basis of many important industrial applications. Compared with the high-energy radiation method and chemical cross-linking method, the installation and operation of the ultraviolet light source generating device are easier, and the investment is less, and there are fewer side reactions such as degradation and oxidation during the cross-linking process. As an important chemical material, ethylene-vinyl acetate copolymer (EVA) is currently mainly used in the production of solar cell packagin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/04C09J11/06B29C47/92B29D7/01B29C48/92
Inventor 余力黎成武
Owner 广州保均塑料科技有限公司
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