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Curable composition

A composition, compound technology, applied in the direction of non-polymer organic compound adhesives, adhesive types, ester copolymer adhesives, etc., can solve the degradation of step absorption and step embedding characteristics, reduce OCR or OCA optics characteristics, increase in stamping characteristics, etc., to achieve the effects of improving stamping performance and handling characteristics, excellent step absorption, and suppressing white turbidity

Pending Publication Date: 2021-09-21
KOZA NOVEL MATERIALS KOREA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Generally, when a large amount of polar functional groups such as hydroxyl groups are contained in OCA or OCR, punching characteristics increase due to increased cohesion, but in this case, step absorption and step embedding characteristics deteriorate
[0007] In addition, the polar functional group can play a role in preventing the white turbidity phenomenon that can occur in OCA or OCR, in which if the ratio of the polar functional group is reduced in consideration of the step absorption and step embedding characteristics, the white turbidity etc. occurs, making it possible Reduced optical properties for OCR or OCA

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0169] Preparation of polymer components

[0170]2-Ethylhexyl acrylate (EHA), 2-hydroxyethyl acrylate (HEA), 2-ethylhexyl methacrylate (EHMA), acrylamide (AAm) and isobornyl acrylate (IBoA) were prepared as follows The ratio of 80 parts by weight: 6 parts by weight: 7 parts by weight: 4 parts by weight: 3 parts by weight (EHA:HEA:EHMA:AAm:IBoA) shown in Table 4 was introduced to make nitrogen reflux and a cooling device was installed so that the temperature Controlled 2L reactor to form monomer mixture. Subsequently, nitrogen was purged for 1 hour to remove oxygen, and with respect to 100 parts by weight of the monomer mixture, introduced thereto in an amount of about 0.03 parts by weight diluted in ethyl acetate while the temperature was raised to about 67°C. AIBN (azobisisobutyronitrile) to a concentration of 50% by weight, and then reacted for 8 hours to prepare a slurry-type polymer component having a weight average molecular weight (Mw) of about 109,000 or so.

[0171...

Embodiment 2

[0174] A polymer component having a weight-average weight (Mw) of about 85,000 was prepared in the same manner as in Example 1, except that the type and ratio of the monomers in preparing the polymer component were adjusted as shown in Table 4 below, and Using this, a pressure-sensitive adhesive layer and a pressure-sensitive adhesive film were prepared in the same manner. The stamping factor (F) measured on the pressure sensitive adhesive layer was around 68.4 gf / μm.

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Abstract

The present application may provide a curable composition and a use thereof, the composition having excellent absorption and embedding at a step and excellent punching performance, preventing cloudiness, and being capable of achieving a low dielectric constant. The curable composition according to the present application is capable of preventing lifting or a delayed bubble from occurring at a stepped portion when the composition is applied to a substrate, etc., having a step, and the effect of inhibiting cloudiness is maintained in a high temperature / high humidity environment whilst the dielectric constant is low, and punching performance and handling properties may be improved. In addition, an adhesive film comprising a cured product formed from the curable composition may have excellent tensile strength.

Description

technical field [0001] This application claims the benefit of priority based on Korean Patent Applications No. 10-2019-0128580 and No. 10-2019-0128581 filed on October 16, 2019, the disclosures of which are incorporated herein by reference in their entirety. [0002] This application relates to curable compositions. Background technique [0003] OCA (optically clear adhesive) or OCR (optical clearrein) is a material applied to a display, and is generally used for, for example, a display for a mobile device or a vehicle. [0004] OCA or OCR is usually applied to stepped surfaces such as bezels. Therefore, even when applied to a step surface, OCA or OCR requires a step-absorbing or step-embedding characteristic that can prevent occurrence of lifting or delaying air bubbles due to a step difference. [0005] However, step absorbency is a physical property opposed to stamping property. OCA or OCR is cut to the required size before application, and in this process, excellent p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/04C08F222/14C09J4/02C09J4/06C09J7/38C09J7/10C08F220/18C08F220/20
CPCC08F265/04C09J4/06C09J7/385C09J7/10C08F220/1808C09J2301/302C09J2433/00C08F220/1811C08F220/20C08F222/102C09J2203/318C09J2301/416C09J2301/312C09J133/066C08F220/56C08F265/06C09J133/04C09J11/00G01N3/08G01N1/04G01N1/286G01N33/442C09J2301/12
Inventor 洪在成尹厚永闵琎舒黄湳翊宋镐径金雨渊
Owner KOZA NOVEL MATERIALS KOREA CO LTD
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