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Photo-thermal dual-cured organosilicon LOCA (liquid optical clear adhesive) composition

A dual-curing, silicone technology, applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of non-curing in dark areas, large shrinkage, poor reliability, etc., and achieve easy rework and defoaming Good, good bonding effect

Inactive Publication Date: 2018-04-06
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the full-fit liquid optical adhesives on the market are mainly acrylic and low-refractive-index silicone materials. Among them, acrylic resin liquid glue has the advantage of fast curing speed, but when used in medium and large-sized products, there are the following problems: 1. 1. The shrinkage rate of acrylate liquid glue is large, generally >2%; 2. After the acrylate liquid glue is cured, if it is used in an environment exceeding 80 °C for a long time, it is prone to yellowing and has poor reliability; 3. Acrylate The liquid-like glue adopts UV curing method, which is prone to uncured dark areas and causes light spots

Method used

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  • Photo-thermal dual-cured organosilicon LOCA (liquid optical clear adhesive) composition
  • Photo-thermal dual-cured organosilicon LOCA (liquid optical clear adhesive) composition
  • Photo-thermal dual-cured organosilicon LOCA (liquid optical clear adhesive) composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Weigh 50 parts of component A1 vinyl phenyl silicone oil, 10 parts of component B1 vinyl phenyl silicone resin, 2 parts of component C1 terminal hydrogen-containing phenyl crosslinking agent, component D side chain hydrogen-containing phenyl Add 7 parts of joint agent, 0.1 part of component E inhibitor, 1 part of component H1 tackifier, and 0.01 part of component I flame retardant into the mixer in turn, stir for 2 hours, then add 0.1 part of component F platinum catalyst, Divide 0.1 parts by weight of photoinitiated platinum catalyst into G, stir for 10 minutes, vacuum defoam for 5 minutes, and pass through 3000mJ / cm 2 After high-energy ultraviolet light curing, heat at 60°C for 10 minutes to completely cure, and the penetration of the obtained colloid is 75.

Embodiment 2

[0080] Weigh 70 parts of component A2 vinyl phenyl silicone oil, 4 parts of component B2 vinyl phenyl silicone resin, 5.5 parts of component C1 terminal hydrogen-containing phenyl cross-linking agent, component D side chain hydrogen-containing phenyl cross-linking agent Add 2.7 parts of joint agent, 0.1 part of component E inhibitor, 1 part of component H2 tackifier, and 0.01 part of component I flame retardant into the mixer in turn, stir for 2 hours, then add 0.1 part of component F platinum catalyst, Divide 0.1 parts by weight of photoinitiated platinum catalyst into G, stir for 10 minutes, vacuum defoam for 5 minutes, and pass through 3000mJ / cm 2 After high-energy ultraviolet light curing, heat at 60°C for 10 minutes to completely cure, and the penetration of the obtained colloid is 90.

Embodiment 3

[0082] Weigh 65 parts of component A1 vinylphenyl silicone oil, 4 parts of component B1 vinylphenyl silicone resin, 3.2 parts of component C2 terminal hydrogen-containing phenyl crosslinking agent, component D side chain hydrogen-containing phenyl crosslinking agent Add 2.9 parts of joint agent, 0.1 part of component E inhibitor, 1 part of component H3 tackifier, and 0.05 part of component I flame retardant into the mixer in turn, stir for 2 hours, then add 0.1 part of component F platinum catalyst, Divide 0.1 parts by weight of photoinitiated platinum catalyst into G, stir for 10 minutes, vacuum defoam for 5 minutes, and pass through 3000mJ / cm 2 After high-energy ultraviolet light curing, heat at 60°C for 10 minutes to completely cure, and the colloid with a penetration of 98 is obtained.

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PUM

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Abstract

Photo-thermal dual-cured organosilicon LOCA (liquid optical clear adhesive) composition is prepared from components of raw materials in parts by weight as follows: (A) 50-80 parts of vinyl phenyl silicone oil, (B) 2-10 parts of ethylene phenyl silicon resin, (C) 2-15 parts of a phenyl crosslinking agent containing hydrogen at terminals, (D) 2-10 parts of a phenyl crosslinking agent containing hydrogen on side chains, (E) 0.1-0.3 parts of an inhibitor, (F) 0.1-0.3 parts of a platinum catalyst, (G) 0.1-0.3 parts of a photo-initiation type platinum catalyst, (H) 1-3 parts of a tackifier and (I) 0.01-0.1 parts of a fire retardant. The LOCA product has the needle penetration of 30-150. The LOCA composition has low viscosity and good flowability, is formed through photo-thermal dual curing including ultraviolet-initiated curing and heating curing sequentially, the obtained LOCA has the characteristics of high transparency, high resilience and low volume shrinkage rate, internal stress of theadhesive and an adhesion substrate is substantially reduced, and the LOCA composition has broad applications in the full lamination field of display screens, touch screens and optical devices.

Description

technical field [0001] The invention relates to a liquid optical adhesive for large-scale full lamination in the field of adhesives, in particular to a photothermal dual-curing silicone liquid optical adhesive composition. Background technique [0002] In order to allow the touch screen to maintain a clear picture quality under strong external light, and to achieve better dustproof and waterproof effects and mechanical strength, touch screen manufacturers have developed a full lamination process. Full bonding means that the panel and the touch screen are seamlessly pasted together with LOCA (Liquid Optical Clear Adhesive), which can reduce glare and reduce the loss of light emitted by the LCD; increase contrast; improve visibility and display performance indoors and outdoors , thereby improving the display effect. [0003] At present, the full-fit liquid optical adhesives on the market are mainly acrylic and low-refractive-index silicone materials. Among them, acrylic resin...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J11/08C09J11/06
CPCC08L2201/08C08L2201/10C08L2205/025C08L2205/035C09J11/06C09J11/08C09J183/04C08L83/04C08L83/06C08K5/523C08K5/0091
Inventor 方小明叶文波赵曦张虎汤胜山殷永彪王全
Owner 东莞市贝特利新材料有限公司
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