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Ultraviolet (UV)-moisture double-curing liquid optical transparent adhesive and preparation method thereof

An optically clear adhesive, dual-curing technology, used in adhesives, polyurea/polyurethane adhesives, adhesive types, etc., can solve problems such as poor curing of glue, and achieve a wide range of products with good transparency and curing shrinkage. low rate effect

Inactive Publication Date: 2012-12-12
HB FULLER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the problem that the glue is not easy to cure in places where ultraviolet rays cannot be irradiated in touch screen bonding and other processes

Method used

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  • Ultraviolet (UV)-moisture double-curing liquid optical transparent adhesive and preparation method thereof
  • Ultraviolet (UV)-moisture double-curing liquid optical transparent adhesive and preparation method thereof
  • Ultraviolet (UV)-moisture double-curing liquid optical transparent adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Preparation of prepolymer A: Weigh 65g of hydroxyethyl methacrylate and put it in a three-necked flask, raise the temperature to 110°C for 2 hours of vacuum dehydration, then lower it to 35°C, add 116.6g of 3-isocyanate methylene-3, 5 , 5-trimethylcyclohexyl isocyanate (IPDI), heated to 70 degrees for 2 hours to obtain a polyurethane prepolymer.

[0029] Weigh 200g of hydroxyalkyl silicone oil with a viscosity of 4000 and place it in a three-necked flask, raise the temperature to 110°C for 2 hours, vacuumize and dehydrate it, then lower it to 40°C, add 18.2g of polyurethane prepolymer, stir well, and heat to 85°C for 2 hours , to obtain polyurethane prepolymer II.

[0030] Add 11.7 g of isocyanate methylene-3,5,5-trimethylcyclohexyl isocyanate (IPDI) to 218.2 g of polyurethane prepolymer II, stir evenly, and react at 75°C for 3 hours to obtain polyurethane acrylate III.

[0031] Weigh 200g of hydroxyl silicone oil with a viscosity of 4000 and place it in a three-necked...

Embodiment 1

[0041] Embodiment 1: prepare UV adhesive according to the following table proportioning. Take 35g of hydroxyethyl methacrylate and 16g of lauryl methacrylate in a three-necked flask, raise the temperature to 115°C and vacuum dehydrate for 2 hours, cool down to room temperature, add 52g of silicone urethane acrylate A, 2g of coupling agent A-172 , 4g of photoinitiator 184 and 1g of TPO were stirred to dissolve, and finally 0.1g of substrate wetting agent KL-245 was added and stirred evenly to obtain a silicone urethane acrylate UV adhesive.

[0042]

Embodiment 2

[0043] Embodiment 2: Prepare silicone polyurethane acrylate UV adhesive according to the ratio in the following table. Preparation method is with embodiment 1.

[0044]

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Abstract

The invention relates to liquid optical transparent adhesive, in particular to ultraviolet (UV)-moisture double-curing liquid optical transparent adhesive and a preparation method thereof. The adhesive comprises, by weight, 30-60 parts of prepolymer, 5-50 parts of activated monomer, 0.1-7 parts of coupling agent, 1-10 parts of photoinitiator and 0.1-3 parts of auxiliaries. The prepolymer has a special molecular structural formula. The adhesive has the advantages of being good in transparency, adhesive strength and flexibility ductility, suitable for bonding of different materials, small in curing shrinkage percentage, resistant to yellowing and the like and can be used for attaching process on some special occasions such as touch screens. The preparation method includes: vacuum dewatering a reactive diluent for 1-2h at the temperature of 110-120 DEG C, cooling to room temperature, adding prepolymer, coupling agent and photoinitiator, stirring, dissolving, and adding auxiliaries to obtain the adhesive. The preparation method has the advantages of being simple in synthetic reaction process, easy to operate, low in cost and wide in product use range.

Description

Technical field: [0001] The present invention relates to the technical field of liquid optically transparent adhesive [hereinafter referred to as LOCA], in particular to a liquid optically transparent adhesive with ultraviolet-moisture dual curing and its preparation method, which is suitable for the adhesion of transparent optical materials, such as touch screens, displays, ITO films, Glass, acrylic, PC and other electro-optical components. Background technique: [0002] LOCA is a special adhesive used for the bonding of transparent optical components. It is required to be colorless and transparent, with a light transmittance above 98; good bonding strength, good softness and ductility, suitable for bonding of different materials; it can be used at room temperature or medium temperature Curing under the same conditions, it has the characteristics of small curing shrinkage and yellowing resistance. Compared with traditional OCA tapes, LOCA has its special advantages and can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/16C08G18/67C08G18/61
Inventor 翟喜权
Owner HB FULLER CO
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