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Moisture-proof and anti-yellowing liquid optical adhesive and preparation method thereof

An optical adhesive and anti-yellowing technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of liquid optical adhesive dependence and hinder the localization process of the display industry, and reduce hygroscopicity , Optimizing the anti-yellowing characteristics and good moisture-proof performance

Active Publication Date: 2019-11-15
JIANGSU SIRUIDA NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the main applications of liquid optical glue is to improve the performance of liquid crystal displays. my country is a big country in the production and consumption of liquid crystal displays, and the market demand is large. However, liquid optical glue with excellent performance is almost entirely dependent on imports, which seriously hinders my country's display industry. The localization process of the industry

Method used

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  • Moisture-proof and anti-yellowing liquid optical adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the moisture-proof and anti-yellowing liquid optical adhesive of the present embodiment comprises the following steps:

[0023] S1. According to parts by weight, add 30-60 parts of acrylic acid prepolymer, 20 parts of methyl methacrylate, 15 parts of diluent monomer and 1 part of initiator into the mixing mixer, and mix and stir for 30 minutes at 60-70 °C , to obtain the first mixture;

[0024] S2. Add 20 parts of EVA into the first mixture, evacuate to -0.08~-0.05MPa, heat up to 80-90°C and stir for 2 hours to obtain the second mixture;

[0025] S3. Add 0.5 parts of coupling agent, 3 parts of polypropylene glycol, 1 part of microcrystalline paraffin and 0.5 parts of antioxidant to the second mixture, stir at 50-60°C for 20-40min, and then heat up to 100°C Insulated for 10min to obtain the third mixture;

[0026] S4. After the third mixture is naturally cooled to room temperature, filtered through a negative pressure reverse osmosis filter, p...

Embodiment 2

[0029] The preparation method and steps of this embodiment are the same as in Example 1, the main difference being the parts by weight of each component, specifically as follows:

[0030] S1. According to parts by weight, add 50 parts of acrylic acid prepolymer, 40 parts of methyl methacrylate, 20 parts of diluting monomer and 2 parts of initiator into the mixing mixer, and mix and stir at 60-70°C for 30 minutes to obtain first mix;

[0031] S2. Add 30 parts of EVA to the first mixture, evacuate to -0.08~-0.05MPa, heat up to 80-90°C and stir for 2 hours to obtain the second mixture;

[0032] S3. Add 1 part of coupling agent, 4 parts of polypropylene glycol, 2 parts of microcrystalline paraffin and 0.5 part of antioxidant to the second mixture, stir at 50-60°C for 20-40min, then heat up to 100°C Insulated for 10min to obtain the third mixture;

[0033] S4. After the third mixture is naturally cooled to room temperature, filtered through a negative pressure reverse osmosis fil...

Embodiment 3

[0035] The preparation method and steps of this embodiment are the same as in Example 1, the main difference being the parts by weight of each component, specifically as follows:

[0036] S1. According to parts by weight, add 60 parts of acrylic acid prepolymer, 50 parts of methyl methacrylate, 25 parts of diluting monomer and 3 parts of initiator into a mixing mixer, and mix and stir at 60-70°C for 30 minutes to obtain first mix;

[0037] S2. Add 40 parts of EVA to the first mixture, evacuate to -0.08~-0.05MPa, heat up to 80-90°C and stir for 2 hours to obtain the second mixture;

[0038] S3. Add 2 parts of coupling agent, 5 parts of polypropylene glycol, 3 parts of microcrystalline paraffin and 1 part of antioxidant into the second mixture, stir at 50-60°C for 20-40min, then heat up to 100°C Insulated for 10min to obtain the third mixture;

[0039] S4. After the third mixture is naturally cooled to room temperature, filtered through a negative pressure reverse osmosis filt...

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Abstract

The invention discloses a damp-proofing anti-yellowing liquid optical adhesive, which includes, by weight, 30-60 parts of an acrylic prepolymer, 20-50 parts of methyl methacrylate, 15-25 parts of a diluting monomer, 20-40 parts of EVA, 1-3 parts of an initiator, 0.5-2 parts of a coupling agent, 3-5 parts of polypropylene glycol, 1-3 parts of microcrystalline paraffin, and 0.5-1 part of an antioxidant. Compared with the prior art, with the acrylic prepolymer, the methyl methacrylate and the EVA as main components, the liquid optical adhesive satisfies demands on light transmittance and refractive index; due to addition of EVA, synergistic effect among the components is improved, so that the liquid optical adhesive is reduced in moisture absorption and has better damp-proofing property. Theliquid optical adhesive is also improved in anti-yellowing performance and has no odor. The preparation method is simple and is easy to carry out.

Description

technical field [0001] The invention relates to an optical adhesive and a preparation method thereof, in particular to a moisture-proof and yellowing-resistant liquid optical adhesive and a preparation method thereof; belonging to the technical field of adhesives. Background technique [0002] Liquid optical adhesive, also known as LOCA, the English name is: Liquid Optical Clear Adhesive, is a special adhesive mainly used for bonding transparent optical components. Its characteristics are: colorless and transparent, light transmittance above 98%, good bonding strength, can be cured at room temperature or medium temperature, and at the same time has the characteristics of small curing shrinkage and yellowing resistance to a certain extent. Liquid Optical Adhesives (LOCA) have particular advantages in certain application areas compared to traditional OCA tapes, addressing the limitations faced by OCA tapes. [0003] One of the main applications of liquid optical glue is to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J151/06C09J11/08C09J11/06C08F291/06C08F220/14C08F220/06
CPCC08F255/026C08F265/00C08L2205/02C08L2205/035C09J11/06C09J11/08C09J151/003C08L51/06C08L71/02C08L91/06C08K5/1345C08F220/14C08F220/06
Inventor 金小林
Owner JIANGSU SIRUIDA NEW MATERIAL TECH
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