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A kind of preparation method of anti-yellowing liquid optical glue

An optical adhesive and anti-yellowing technology, which is applied in the field of preparation of anti-yellowing liquid optical adhesives, can solve the problems of large curing shrinkage, reduced adhesive strength, weak adhesive force and the like, and achieves a simple and easy preparation method, Improved uniformity and low cost

Active Publication Date: 2014-10-22
SHENZHEN ANLI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, epoxy-containing acrylate epoxy acrylate or bisphenol A epoxy acrylate will inevitably yellow, and the curing shrinkage rate is large, and it is hard and brittle after curing, while sulfur-containing acrylate generally exists The disadvantages of bad smell and weak adhesion, or adding plasticizers with high refractive index, such as phthalates and tricresyl phosphate, but the plasticizers do not participate in the curing reaction, resulting in the bonding strength of the product Reduced, and phthalates and tricresyl phosphate are toxic substances, the use is restricted

Method used

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  • A kind of preparation method of anti-yellowing liquid optical glue
  • A kind of preparation method of anti-yellowing liquid optical glue
  • A kind of preparation method of anti-yellowing liquid optical glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] To prepare yellowing-resistant liquid optical adhesive, first prepare a polyurethane-modified acrylate prepolymer, denoted as prepolymer A, and the preparation method is as follows:

[0039] Add 113g polypropylene glycol (PPG-2000, Jiangsu Haian Petrochemical Plant) and 87g polycaprolactone diol (molecular weight 2000, Japanese Daicel) into a flask with a thermometer, suction port and stirring device, and heat to 100 ℃, vacuum dehydration for 2h, use Karl Fischer method to determine the moisture content below 0.05%, add 0.2g of catalyst dibutyltin dilaurate, heat up to 115℃, drop 23.8g isophorone diisocyanate and 16.5g diisocyanate Cyclohexylmethane diisocyanate (HMDI), stir and react for 5h, then add 18.9g hydroxypropyl acrylate and 0.1g catalyst dibutyltin dilaurate, 0.2g 2,2,6,6-tetramethylpiperidine nitroxide free After the reaction is completed, the isocyanate group is measured at 2270 cm by infrared spectroscopy. -1 The stretching vibration peak at the position drops...

Embodiment 2

[0044] To prepare the yellowing-resistant liquid optical adhesive, first prepare a polyurethane-modified acrylate prepolymer, denoted as prepolymer B. The preparation method includes the following steps:

[0045] Add 129g of polytetrahydrofuran glycol with a molecular weight of 2000 (PTMEG-2000, BASF) and 107g of polycaprolactone diol (molecular weight of 3000, Japanese Daicel) into a flask equipped with a thermometer, a suction port and a stirring device. Dehydrate under vacuum for 2.5 hours at 100°C, use Karl Fischer method to determine moisture content below 0.05%, add 0.095g of catalyst dibutyltin dilaurate, heat up to 100°C, add 27g isophorone diisocyanate and 14g dropwise Dicyclohexylmethane diisocyanate (HMDI), stir and react for 4h, then add 27.6g o-hydroxycyclohexyl methacrylate and 0.35g catalyst dibutyltin dilaurate, 0.12g 2,2,6,6-tetramethyl Piperidine nitroxide radical, continue to react at 80℃ for 6h, the reaction is complete, the isocyanate group is measured at 227...

Embodiment 3

[0050] To prepare the yellowing-resistant liquid optical adhesive, first prepare a polyurethane modified acrylate prepolymer, denoted as prepolymer C, and the preparation method includes the following steps:

[0051] Add 180g polypropylene glycol (PPG-3000, Jiangsu Haian Petrochemical Plant) and 80g polycaprolactone diol (molecular weight 2000, Japanese Daicel) into a flask with a thermometer, suction port and stirring device, and heat to 90 ℃, vacuum dehydration for 1h, use Karl Fischer method to determine the moisture content below 0.05%, add 0.39g of catalyst dibutyltin dilaurate, heat up to 90℃, drop 26g isophorone diisocyanate and 12.4g bicyclic Hexylmethane diisocyanate (HMDI), stir and react for 6h, then add 20.2g 2-hydroxyethyl methacrylate and 0.39g catalyst dibutyltin dilaurate, 0.26g 2,2,6,6-tetramethylpiperidine nitrogen Oxygen radicals, continue to react at 90°C for 7h. After the reaction is complete, the isocyanate group at 2270cm is determined by infrared spectrosc...

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Abstract

The invention belongs to the technical field of adhesive materials, and discloses a preparation method of a yellowing resistant liquid optical adhesive. The yellowing resistant liquid optical adhesive employs the following raw materials by weight percentage: 30-40% of a polyurethane modified acrylate prepolymer, 6-15% of an active diluent monomer, 30-45% of a plasticizer, 5-10% of a coupling agent, 1.5-4% of a photoinitiator, 0.5-3% of an antioxidant and 0.1-1% of a yellowing resistant inhibitor A. The preparation method is as below: evenly mixing the raw materials, heating the raw materials to 30-100 DEG C, stirring and reacting for 0.2-2 h, vacuumizing to remove air bubbles, and cooling to obtain a liquid optical adhesive. The liquid optical adhesive prepared by the invention employs yellowing resistant polyurethane modified acrylate monomer, coupling agent, plasticizer, photoinitiator and antioxidant as raw materials; the synergistic effect between the components is utilized, so that the prepared optical adhesive has advantages of transmission rate greater than 99%, high refractive index, and significant yellowing and aging resistance; and the preparation method is simple and practicable.

Description

Technical field [0001] The invention relates to an adhesive material, in particular to a method for preparing a yellowing-resistant liquid optical glue. Background technique [0002] With the rapid development of the information industry, mobile phones, notebook computers, personal digital assistants (PDAs) and other handheld entertainment electronic products have become necessities in people's lives, and liquid crystal displays (LCD) have gradually become the mainstream displays of these electronic products. my country is the main production area of ​​LCDs in the world, but almost all of them rely on imports for liquid optical adhesives, the special adhesive for improving LCD performance, which seriously hinders the localization of my country's LCD manufacturing industry. [0003] Liquid Optical Adhesive (LOCA) is a special adhesive with similar optical performance to transparent optical components and good bonding performance. It bonds two or more transparent optical components i...

Claims

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Application Information

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