Ultraviolet-cured liquid optical adhesive as well as preparation method and application thereof

A technology of ultraviolet light and optical glue, applied in the fields of optics, nonlinear optics, adhesives, etc., can solve the problems of contamination of the display screen, poor display, glue overflow and curing shrinkage, etc.

Active Publication Date: 2020-10-23
DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical glue used in the full lamination process of the touch film prepared by the present invention generally has the problems of overflowing glue and excessive curing shrinkage during the laminating process, and the overflowing glue will pollute the backlight components of the display screen and cause poor display.

Method used

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  • Ultraviolet-cured liquid optical adhesive as well as preparation method and application thereof
  • Ultraviolet-cured liquid optical adhesive as well as preparation method and application thereof
  • Ultraviolet-cured liquid optical adhesive as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0072] This preparation example provides a kind of tackifying resin, and described tackifying resin has the structure shown in following formula I-1:

[0073]

[0074] Formula I-1

[0075] The tackifying resin is prepared by the following method: add 2 g of dibenzoyl peroxide, 0.1 g of RAFT reagent and 500 mL of xylene into a four-necked flask with a stirrer, a temperature control device and a nitrogen protection device, and raise the temperature to 90° C. , gradually add 400g of n-butyl acrylate and 200g of glycidyl methacrylate dropwise, control the dropping time for 4h, then continue the reaction for 3.5h, and add 0.1g of N,N dimethyldipropyltriamine after the polymerization reaction is complete Carry out decolorization, finally concentrate solvent, obtain the tackifying resin shown in formula I-1.

[0076] The tackifying resin represented by Formula I-1 has a viscosity of 25000 cps, a number average molecular weight of 8100, a molecular weight polydispersity coefficien...

preparation example 2

[0078] This preparation example provides a kind of tackifying resin, and described tackifying resin has the structure shown in following formula I-2:

[0079]

[0080] Formula I-2

[0081] The tackifying resin is prepared by the following method: add 5g of dibenzoyl peroxide, 0.3g of RAFT reagent and 450mL of xylene into a four-necked flask with a stirrer, a temperature control device and a nitrogen protection device, and heat up to 90°C , gradually add 230g of functional monomer hydroxyethyl methacrylate and 300g of isooctyl acrylate dropwise, control the dropping time for 4h, then continue to react for 4h, and add 0.05g of N,N dimethyldipropylene after the polymerization reaction is complete Base triamine is used for decolorization, and finally the solvent is concentrated to obtain the tackifying resin shown in formula I-2.

[0082]The tackifying resin represented by formula I-2 has a viscosity of 32000 cps, a number average molecular weight of 9300, a molecular weight p...

preparation example 3

[0084] This preparation example provides a kind of tackifying resin, and described tackifying resin has the structure shown in following formula I-3:

[0085]

[0086] Formula I-3

[0087] The tackifying resin is prepared by the following method: 2g dibenzoyl peroxide, 0.1g RAFT reagent and 400mL xylene are added to a four-necked flask with a stirrer, a temperature control device and a nitrogen protection device, and the temperature is raised to 90°C , gradually add 200g of functional monomer isobornyl methacrylate and 300g of caprolactone acrylate dropwise, control the dropping time for 4h, then continue to react for 4h, add 0.08g of N,N dimethyldipropylene Base triamine is used for decolorization, and finally the solvent is concentrated to obtain the tackifying resin shown in formula I-3.

[0088] The tackifying resin represented by formula I-3 has a viscosity of 33000 cps, a number average molecular weight of 10000, a molecular weight polydispersity coefficient of 1.23,...

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Abstract

The invention provides an ultraviolet curing liquid optical adhesive as well as a preparation method and application thereof. The intrinsic solid shrinkage rate of the ultraviolet curing liquid optical adhesive is 0.6% or below. The ultraviolet curing liquid optical adhesive comprises tackifying resin, an active oligomer, an active diluent and a photoinitiator, wherein the tackifying resin has a structure as shown in a formula I which is described in the specification. The ultraviolet curing liquid optical adhesive can reduce curing shrinkage and reduce the mura risk of yellow spots in a liquid crystal touch screen attaching process.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an ultraviolet light-curable liquid optical adhesive and a preparation method and application thereof. Background technique [0002] The bonding process of LCD touch screen includes frame bonding and full bonding. The full lamination method can use optical glue to fill the air layer between the touch screen (TP) and the liquid crystal display module (LCM), thereby improving the display effect. Full lamination mainly uses two materials, Optical Transparent Tape (OCA) and Liquid Optical Adhesive (LOCA). The advantages of OCA are no glue overflow and no curing shrinkage, but the process is complex, the cost of equipment and materials is high, and it cannot meet the lamination of complex profiles. The advantage of LOCA is that the lamination process is relatively simple, which can meet the lamination of complex surfaces, and is more suitable for the lamination of medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J11/08C09J11/06C08F220/18C08F220/32C08F220/20C08F220/28C08F2/38G02F1/1333
CPCC09J4/00C09J11/08C09J11/06C08F220/1804C08F220/1808C08F220/282C08F2/38G02F1/13338C08F2438/03C08F220/325C08F220/20C08F220/1811
Inventor 胡联灵张亚平曾光明庞晓东刘兆辉
Owner DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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