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A kind of UV light curing high light transmittance optical adhesive and preparation method thereof

A technology of high light transmittance and optical glue, which is applied in the field of optical glue, can solve problems such as difficult heat dissipation, comprehensive performance of products that cannot meet performance requirements, and accidents easily, so as to ensure light transmittance and haze, and improve comprehensive performance , Improve the effect of sticking force

Active Publication Date: 2021-01-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formula of the UV curable acrylic pressure-sensitive adhesive of the invention is environmentally friendly and non-toxic, has good viscosity performance, and is relatively simple to use. However, when the experiment is expanded, because there is no batch feeding, the heat is not easy to dissipate, and it is easy to cause accidents. More importantly, , the overall performance of the product finally obtained by this technology cannot meet the performance requirements of electronic equipment such as liquid crystal displays

Method used

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  • A kind of UV light curing high light transmittance optical adhesive and preparation method thereof
  • A kind of UV light curing high light transmittance optical adhesive and preparation method thereof
  • A kind of UV light curing high light transmittance optical adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 (E1): raw material formula sees Table 1

[0048] Table 1 Example 1 formula table

[0049] raw material BA HEA 2-EHA IBOA NDM HDDA AIBN 1173 001 Mass / g 20 10 60 5 0.1 5 0.3 0.1 0.9

[0050] Pretreatment of raw materials: butyl acrylate (BA), hydroxyethyl acrylate (HEA), isooctyl acrylate (2-EHA), isobornyl acrylate (IBOA) and reactive diluent HDDA were vacuum dehydrated for 1 h before use, oil The bath temperature is the same as their respective boiling points, and dodecyl mercaptan (NDM) and azobisisobutyronitrile (AIBN) are placed in a vacuum oven for 12 hours for use. Put the mixed solution of 40wt% BA, 2-EHA and NDM after pretreatment into a 250ml four-neck flask, after heating up to 80°C, dissolve AIBN in another 60wt% mixed solution of BA, 2-EHA and NDM And all the HEA, IBOA, HDDA solutions, then add 1173, 001, shake well, add to the polytetrafluoroethylene constant pressure dropping funnel and start to drop...

Embodiment (E2

[0051] Embodiment (E2): raw material formula sees Table 2

[0052] Table 2 Example 2 formula table

[0053] raw material HEA 2-EHA MMA t-BA NDM HDDA AIBN 1173 002 Mass / g 10 60 15 10 0.1 5 0.3 0.1 1.3

[0054] Pretreatment of raw materials: tert-butyl acrylate (t-BA), hydroxyethyl acrylate (HEA), isooctyl acrylate (2-EHA), methyl methacrylate (MMA) and reactive diluent HDDA are vacuumed before use Dehydration was carried out for 1 hour, the temperature of the oil bath was the same as their respective boiling points, and dodecyl mercaptan (NDM) and azobisisobutyronitrile (AIBN) were placed in a vacuum oven for 12 hours before use.

[0055] Put the mixed solution of 30% t-BA, 2-EHA and NDM after pretreatment into a 250ml four-necked flask, and after raising the temperature to 80°C, dissolve AIBN in another 70% of t-BA, 2-EHA and Add 1173 and 002 to the mixed solution of NDM and the mixed solution of HEA, MMA, and HDDA, shake well, add ...

Embodiment 3

[0056] Embodiment 3 (E3): raw material formula sees Table 3

[0057] Table 3 Example 3 formula table

[0058] raw material BMA HEA 2-EHA t-BA DMAA NDM HDDA AIBN 1173 001 Mass / g 20 10 60 10 10 0.1 5 0.3 0.1 1.4

[0059] Raw material pretreatment: butyl methacrylate (BA), hydroxyethyl acrylate (HEA), isooctyl acrylate (2-EHA), tert-butyl acrylate (t-BA), N,N-dimethylacrylamide (DMAA) and reactive diluent HDDA were vacuum dehydrated for 1 h before use, and the temperature of the oil bath was the same as their respective boiling points. Dodecylmercaptan (NDM) and azobisisobutyronitrile AIBN were placed in a vacuum oven for 12 h before use.

[0060] Put the mixed solution of pretreated 60% BMA, 2-EHA and NDM into a 250ml four-neck flask, after the temperature was raised to 80°C, AIBN was dissolved in another 40% mixed solution of BMA, 2-EHA and NDM and Into the mixed solution of HEA, t-BA, HDDA, DMAA, then add 1173, 001, shake well, a...

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Abstract

The invention discloses a UV light-curing high-light-transmittance optical adhesive and a preparation method thereof. In terms of parts by weight, the raw material formula of the high-light-transmittance optical transparent adhesive includes 20-50 parts of alkyl acrylate or alkyl methacrylate, 15-40 parts of hydroxyalkyl acrylate or hydroxyalkyl methacrylate, 10-15 parts of N atom-containing polarmonomers, 10-20 parts of a reactive diluent, 0.1-2 parts of a chain transfer agent, 0.5-1 part of a thermal initiator, 0.5-1 part of a photoinitiator and 0.6-1.8 parts of other additives. The high-light-transmittance UV-curing optical transparent adhesive has a solid content of 100%, and exhibits a pressure-sensitive state after light curing is performed, and the product has a light transmittanceof >= 99%, a haze value of <= 0.1%, holding power of >= 230 h and moderate initial adhesion; and moreover, no shift and no easy falling off are caused after adhesion is performed, and the product hasa small coating amount, low cost and low energy consumption, and is an environment-friendly product.

Description

technical field [0001] The invention relates to an optical adhesive, in particular to a UV light-cured high-transmittance optical adhesive and a preparation method thereof. The optical adhesive is an optical pressure-sensitive adhesive that can be used for bonding touch screens. Background technique [0002] Solventborne pressure sensitive adhesives (PSAs) typically have low solids, such as about 40% to about 55% solids. Solution coating processes generally limit the effective coating thickness for conventional applications because of the difficulty in effectively evaporating all solvents from thick films. However, for many applications, thicker films are required. Hot melt adhesives offer a way to make thick films, however most hot melt adhesives are rubber based and have performance limitations. [0003] With the development of society, the requirements for environmental protection are getting higher and higher, and the currently used solvent-based optical glue has the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/38C09J7/10C08F220/18C08F220/20C08F222/14C08F220/14C08F220/54C08F220/32C08F226/06C08F226/10
CPCC08F220/18C09J11/06C09J133/066C09J7/10C09J7/385C09J2301/302C08K5/13
Inventor 傅和青王盛周蒙颜启明
Owner SOUTH CHINA UNIV OF TECH
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