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Preparation method of optical adhesive glue

An adhesive and optical technology, applied in the direction of adhesive types, ester copolymer adhesives, non-polymer adhesive additives, etc. problems such as low strength, to achieve the effect of enhancing the coating effect, shortening the defoaming time, and small temperature gradient

Active Publication Date: 2012-02-22
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

[0018] 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.

[0019] First defoam in a closed container at a pressure of 0.03MPpa, then pressurize to float the bottom bubbles, and then remove the small bubbles at a pressure of 0.08Mpa, and coat the defoamed glue on a polyterephthalene with a thickness of 75um Anti-adhesive release with polyethylene terephthalate film (thickness 50um) on ethylene glycol formate release film, dried in an oven from 60-100°C in 5 stages within 4 minutes The film is compounded, and then aged at room temperature for 7 days to obtain an optical adhesive.

Embodiment 2

[0021] 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.

[0022] 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 50μm On the film, use an oven to dry in three stages from 60-100°C within 3 minutes, and then compound it with the anti-adhesive release film of polyvinyl acetate film (thickness 30 μm), and then age it at room temperature for 7 days. Optical adhesives are available.

Embodiment 3

[0024] 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.

[0025] 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 30μm On the ethylene glycol formate release film, use an oven to dry in 4 stages from 60-100°C within 4 minutes, and then compound it with a polypropylene (thickness 80 μm) anti-adhesive release film, and then dry it at room temperature The optical adhesive glue can be obtained by aging for 7 days.

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Abstract

The present invention relates to a kind of preparation method of optical adhesive glue, and the method is as follows: (a) the C4-12 alkyl methacrylic acid polymer of 98-99.9% by weight is accurately weighed in proportion and 0.1-2% by weight % cross-linking curing agent, and cross-linking curing agent into methacrylate C4-12 alkyl ester polymer, the cross-linking curing agent is melamine compounds, isocyanate compounds or epoxy compounds; (b) First, high vacuum defoaming, followed by pressurization inside the container to float the bottom bubbles, and then low vacuum to remove small bubbles; (c) Coating the defoamed glue on the anti-adhesive release film; (d) using an oven 2 - Gradient temperature rise from 60°C to 100°C within 4 minutes to dry, and compound with another piece of anti-adhesive release film; (e) Aging at room temperature. The adhesive prepared by the present invention has the advantages of high transparency, excellent weather resistance, etc., and does not turn yellow over time. At the same time, it has high adhesive strength and can be widely used in optical fields such as liquid crystal flat panel displays and protective films. Glue, fix.

Description

technical field [0001] The invention relates to a preparation method of optical adhesive glue. 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 unimpeded, and it must be subjected to aging tests un...

Claims

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Application Information

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