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Optical adhesive and preparation method thereof

An adhesive and optical technology, applied in the direction of adhesive types, ester copolymer adhesives, non-polymer adhesive additives, etc., can solve the problems affecting the bonding application in the optical field, low adhesive strength, and easy occurrence Yellowing and other problems can be achieved to enhance the coating effect, the temperature gradient is small, and the time for defoaming is shortened

Active Publication Date: 2009-12-02
PANYU NANSHA YAN TIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure-sensitive adhesive with acrylate copolymer as a single component has good transparency, but its cohesion is low, resulting in low adhesive strength. At the same time, the weather resistance is also deteriorated, and it is prone to yellowing, which seriously affects its performance in the optical field. fit application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 99.9 g of n-butyl methacrylate (molecular weight: 683800) and 0.1 g of polyfunctional crosslinked epoxy polymer glycerol diglycidyl ether were mixed and stirred, and the adhesive solution of the optical adhesive was prepared after mixing evenly.

[0018] First defoam in a closed container at a pressure of 0.03Mpa, then pressurize to float the bubbles at the bottom, and then remove small bubbles at a pressure of 0.08Mpa, and coat the defoamed glue on a polyterephthalene with a thickness of 75um On the ethylene glycol formate release film, the anti-adhesive release film of the polyethylene terephthalate film (thickness 50um) is dried in an oven from 60-100°C in 5 stages within 4 minutes compounding, and then aged for 7 days at room temperature to obtain an optical adhesive.

Embodiment 2

[0020] 98 grams of lauryl methacrylate (molecular weight: 702400) and 2 grams of trimethylol melamine were mixed and stirred, and the adhesive solution of the optical adhesive was prepared after mixing evenly.

[0021] First defoam in a closed container at a pressure of 0.02Mpa, then pressurize to float the bubbles at the bottom, then remove small bubbles at a pressure of 0.06Mpa, and coat the defoamed glue on a polypropylene release type with a thickness of 50um On the film, use an oven to heat up from 60-100°C in 3 stages within 3 minutes and dry it, then compound it with the anti-adhesive release film of polyvinyl acetate film (thickness 30um), and then age it at room temperature for 7 days. Obtain optical adhesive glue.

Embodiment 3

[0023] 99 grams of n-octyl methacrylate (molecular weight: 636600) and 1 gram of diphenylmethane diisocyanate were mixed and stirred, and the adhesive solution of the optical adhesive was prepared after mixing evenly.

[0024] First defoam in a closed container at a pressure of 0.01Mpa, then pressurize to float the bubbles at the bottom, then remove the small bubbles at a pressure of 0.07Mpa, and coat the defoamed glue on a polyterephthalene with a thickness of 30um On the ethylene glycol formate release film, use an oven to heat up from 60-100°C in 4 stages within 4 minutes and dry it, then compound it with a polypropylene (thickness 80um) anti-adhesive release film, and then age at room temperature Optical adhesive glue can be obtained in 7 days.

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Abstract

The invention relates to an optical adhesive and a preparation method thereof. The optical adhesive comprises the components of a methacrylic acid C4-12 alkyl ester polymer and a crosslinking curing agent, wherein the crosslinking curing agent is a tripolycyanamide compound, an isocyanate compound or an epoxy compound, and the molecular weight of the ester polymer is between 600,000 and 800,000. The preparation method of the adhesive comprises the following steps: precisely weighing the components of the methacrylic acid C4-12 alkyl ester polymer and the crosslinking curing agent in proportion, and mixing the components; defoaming the mixture and coating the mixture on an anti-mucous release film; and drying the anti-mucous release film in a drying oven, and then using another anti-mucous release film to compound with the anti-mucous release film. The adhesive prepared by the method has the advantages of high transparency, excellent weathering resistance and the like, has no xanthochromia with the passage of time, and simultaneously has high adhesive strength, and can be widely applied to adhering and fixing liquid crystal flat panel display and protective films and the like in the optical field.

Description

technical field [0001] The invention relates to an optical adhesive glue for laminating a protective film and a preparation method thereof. Background technique [0002] Optical grade adhesive is a common material used for laminating or fixing transparent materials, and is used on substrates such as clear glass sheets, polycarbonate and acrylic sheets. In recent years, with the rapid development of the liquid crystal flat panel display industry, optical adhesives have also been used in the assembly of projection screens, assembly of aerospace or military optical equipment, panel or lens assembly, and bonding of touch screens. The method is to use a pressure-sensitive adhesive tape or sheet to attach or fix the optical film on a transparent material as a base. In these applications, the pressure-sensitive adhesive or pressure-sensitive adhesive tape or sheet must have transparency that allows the visibility of the transparent material substrate or optical film to be unimpede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06C09J11/06C09J7/02
Inventor 李兆辉藤川昇钟强锋
Owner PANYU NANSHA YAN TIN CHEM
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