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Surface protective film

A technology of surface protection film and base film, which is applied in the direction of film/sheet adhesive, non-polymer adhesive additive, adhesive type, etc., can solve the problem that it is impossible to use acetylacetone, etc., and achieve optical improvement The effect of the characteristic

Pending Publication Date: 2022-05-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of a solvent-free adhesive composition, there is a problem that it is impossible to use acetylacetone, which is a commonly used curing retarder, as a solvent

Method used

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  • Surface protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (1) Composition for forming an adhesive layer

[0075] A 2L 5-neck glass reactor equipped with a reflux condenser was prepared, and then 764 g of bifunctional polyol SC-2204 (Mn-2,000 g / mol, KPX Chemical Co., Ltd.) and 110 g of dicyclohexamethylene were placed therein diisocyanate (H12MDI, Evonik), and then sequentially added thereto 300 g of 2-ethylhexyl acrylate (2-EHA, LG Chem.) and 300 g of lauryl acrylate (M120, Miwon Specialty Chemical Co., Ltd.). After the addition was complete, the mixture was heated to 70°C and kept at 70°C while stirring at a speed of 100 rpm to become homogeneous. At the same temperature, 50 ppm DBTDL was added to the mixture to initiate the reaction to form NCO prepolymer, and the mixture was kept at 78°C to 82°C for 3 hours. Thereafter, 26 g of 2-HEA (Nippon Shokubai Co., Ltd.) was added to the mixture, and then the mixture was reacted at 80° C. for 3 hours until the FT-IR NCO peak (2,260 cm -1) disappeared, thereby producing a urethane-b...

Embodiment 2

[0081] A surface protection film was produced in the same manner as in Example 1 except that acrylic acid was used in an amount of 0.8 parts by weight in preparing the adhesive composition.

Embodiment 3

[0083] A surface protection film was manufactured in the same manner as in Example 1 except that acrylic acid was used in an amount of 1.2 parts by weight when preparing the adhesive composition.

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Abstract

The present disclosure relates to a surface protective film, and in particular, to a surface protective film having improved optical characteristics and including an adhesive layer formed from an adhesive composition having improved stability by containing a curing retarder.

Description

technical field [0001] This application claims the benefit of the filing date of Korean Patent Application No. 10-2020-0035829 filed with the Korean Intellectual Property Office on March 24, 2020, the disclosure of which is incorporated herein by reference in its entirety. The present disclosure relates to surface protection films, and in particular, to surface protection films having improved optical properties and comprising an adhesive layer formed from an adhesive composition having improved stability by including a curing retarder . Background technique [0002] Unlike a liquid crystal display (LCD), a self-luminous display device, an organic light emitting diode (OLED), does not require a separate light source, and thus can be manufactured in a lightweight and thin form. In addition, organic light emitting diodes are not only advantageous in terms of power consumption due to low-voltage driving, but also have excellent response speed, viewing angle, and contrast, and ...

Claims

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Application Information

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IPC IPC(8): C09J7/30C09J175/14C09J11/06C09J7/25C09J7/22
CPCC09J7/30C09J175/14C09J11/06C09J7/255C09J7/22C09J2467/006C09J2475/00C09J2301/122C09J175/04C08J5/18C08F290/06C08F290/067C09J2301/312C09J2203/318
Inventor 金昭镇金贤哲崔祯珉康贤求林载承
Owner LG CHEM LTD
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