Preparation method of moisture-proof anti-yellowing liquid optical adhesive

An anti-yellowing, optical adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc. The production cost is low, the uniformity is improved, and the preparation method is simple and easy to implement.

Active Publication Date: 2013-11-06
SHENZHEN ANLI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to obtain a higher refractive index, liquid optical adhesives generally choose bisphenol A epoxy acrylate or sulfur-containing acrylate as the main resin, but epoxy-containing acrylate or bisphenol A epoxy acrylate Yellowing will be inevitable, and acrylates containing sulfur elements generally have the disadvantages of bad smell and weak adhesion, or add plasticizers with high refractive index, such as phthalates and tricresyl phosphate , but the plasticizer does not participate in the curing reaction, which can lead to a decrease in the bonding strength of the product

Method used

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  • Preparation method of moisture-proof anti-yellowing liquid optical adhesive
  • Preparation method of moisture-proof anti-yellowing liquid optical adhesive
  • Preparation method of moisture-proof anti-yellowing liquid optical adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] To prepare moisture-proof and anti-yellowing liquid optical glue, first prepare a polyurethane-modified acrylate prepolymer, which is denoted as prepolymer A, and the preparation method is as follows:

[0042] Add 48g polypropylene glycol (PPG-3000, Jiangsu Haian Petrochemical Plant) and 95g hydroxyl-terminated polybutadiene (PolybdR-45M, molecular weight 2800) into a flask equipped with a thermometer, an air inlet and a stirring device, and heat to 100°C , dehydrated under vacuum for 1 hour, and the moisture content was determined to be below 0.05% by the Karl Fischer method. Add 0.11g of catalyst dibutyltin dilaurate, raise the temperature to 80°C, and dropwise add 12.3g of isophorone diisocyanate and 9.1g of bicyclic Hexylmethane diisocyanate (HMDI), stirred for 4 hours, then added 9.8g of hydroxypropyl acrylate and 0.14g of catalyst dibutyltin dilaurate, 0.14g of 2,2,6,6-tetramethylpiperidine nitroxide radical, Continue to react at 80°C for 8h. After the reaction is...

Embodiment 2

[0047] To prepare moisture-proof and anti-yellowing liquid optical glue, first prepare a polyurethane-modified acrylate prepolymer, denoted as prepolymer B, and the preparation method includes the following steps:

[0048] Add 47g polytetrahydrofuran diol (PTMEG-3000, molecular weight 3000, BASF) and 72g hydroxyl-terminated polybutadiene (Krasol LBH-2000, molecular weight 2100) into a flask equipped with a thermometer, a suction port and a stirring device, and heat to 90°C, vacuum dehydration for 2 hours, the moisture content was determined to be below 0.05% by the Karl Fischer method, and 0.05g of catalyst dibutyltin dilaurate was added, the temperature was raised to 90°C, and 9.7g of isophorone diisocyanate and 9.5 g dicyclohexylmethane diisocyanate (HMDI), stirred for 3 hours, then added 16.6g o-hydroxycyclohexyl methacrylate (HCMA) and 0.10g catalyst dibutyltin dilaurate, 0.14g2,2,6,6 -Tetramethylpiperidine nitroxide free radical, continue to react at 90°C for 6h, the reac...

Embodiment 3

[0053] To prepare a moisture-proof and anti-yellowing liquid optical adhesive, first prepare a polyurethane-modified acrylate prepolymer, denoted as prepolymer C, and the preparation method includes the following steps:

[0054] Add 33g of polypropylene glycol (PPG-2000, Jiangsu Haian Petrochemical Plant) and 71g of hydroxyl-terminated polybutadiene (KrasolLBH-2000, molecular weight 2100) into a flask equipped with a thermometer, an air inlet and a stirring device, and heat to 90°C , vacuum dehydration for 1.5h, the moisture content was determined to be less than 0.05% by Karl Fischer method, 0.12g of catalyst dibutyltin dilaurate was added, the temperature was raised to 80°C, 14g of isophorone diisocyanate and 9.7g of bicyclic Hexylmethane diisocyanate (HMDI), stirred for 5 hours, then added 10.4g of 2-hydroxyethyl methacrylate and 0.04g of catalyst dibutyltin dilaurate, 0.16g of 2,2,6,6-tetramethylpiperidine nitrogen oxide Free radicals, continue to react at 90°C for 7h, aft...

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Abstract

The invention belongs to the technical field of adhesive materials and discloses a preparation method of a moisture-proof anti-yellowing liquid optical adhesive. The raw materials of the moisture-proof anti-yellowing liquid optical adhesive comprise the components of, by weight percentage, 40-50% of polyurethane modified acrylate prepolymer, 10-18% of reactive diluent monomer, 20-32% of plasticizer, 12-20% of coupling agent, 1.5-3.0% of photoinitiator, 1.5-3.0% of antioxygen and 0.5-1.5% of anti-yellowing polymerization inhibitor. The method comprises mixing and heating the raw materials to a temperature of 30-70 DEG C for reaction for 0.5-2 hours, and vacuumizing the reaction products to remove bubbles and cooling the reaction products to obtain the moisture-proof anti-yellowing liquid optical adhesive. According to the preparation method of the moisture-proof anti-yellowing liquid optical adhesive, the polyurethane modified acrylate prepolymer, the reactive diluents monomer, the plasticizer, the coupling agent, the photoinitiator, the antioxygen and the like, which are provided with hydrophobicity and yellowing resistance, are taken as the raw materials; due to the synergistic effects of the components, the prepared liquid optical adhesive has the advantages of high light transmittance, high refractive index, yellowing resistance and good moisture-proof performance; the preparation method is simple and easy to operate.

Description

technical field [0001] The invention relates to an adhesive material, in particular to a preparation method of a moisture-proof and anti-yellowing liquid optical adhesive. Background technique [0002] Along with the rapid development of the information industry, mobile phones, notebook computers, personal digital assistants (PDAs) and other handheld entertainment electronic products have become a necessity in people's lives, and liquid crystal displays (LCDs) have gradually become the mainstream displays of these electronic products. my country is the main production place of LCD in the world, but for the special adhesive to improve the performance of LCD - liquid optical glue, almost all depends on imports, which seriously hinders the localization process of my country's LCD manufacturing industry. [0003] Liquid Optical Adhesive (LOCA) is a special adhesive that has similar optical properties to transparent optical components and has good bonding performance. It bonds tw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/06C09J11/08C08G18/67C08G18/48
Inventor 丁小卫钱柏太欧阳涛
Owner SHENZHEN ANLI NEW MATERIALS
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