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Multilayer film and its manufacturing method

A manufacturing method and multi-layer film technology, which can be used in chemical instruments and methods, layered products, flat products, etc., can solve the problems of insufficient heat and humidity resistance of triacetyl cellulose, and performance degradation of polarizing plates, and achieve excellent Excellent effect of UV shielding performance, mechanical strength, and surface morphology

Inactive Publication Date: 2018-04-13
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the moisture resistance of triacetyl cellulose is not sufficient, and when a polarizing plate using triacetyl cellulose as a polarizing surface protection film is used under high temperature or high humidity, the performance as a polarizing plate such as polarization degree and color tone will be reduced. falling problem

Method used

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  • Multilayer film and its manufacturing method
  • Multilayer film and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0121] The present invention will be described in more detail while showing examples, but the present invention is not limited to the following examples. In addition, unless otherwise specified, "part" and "%" are based on weight.

[0122] The evaluation of this Example was performed by the following method.

[0123] (1) Weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn)

[0124] The molecular weights of the block copolymer and the hydrogenated product of the block copolymer were measured at 38° C. by GPC using THF as an eluent as a value in terms of standard polystyrene. As a measuring device, HLC8020GPC manufactured by TO SOH Co., Ltd. was used.

[0125] (2) Hydrogenation rate

[0126] Determination of hydrogenation rate of main chain, side chain and aromatic ring of hydrogenated block copolymer 1 H-NMR spectrum was calculated.

[0127] (3) Membrane surface properties

[0128] The surface appearance of the extruded film was observed and eval...

reference example 1

[0136] ・Manufacture of hydrogenated block copolymer [D1]

[0137] (Manufacture of block copolymer [C1])

[0138] 550 parts of dehydrated cyclohexane, 37.5 parts of dehydrated styrene, and 0.475 parts of di-n-butyl ether were placed in a reactor equipped with a stirring device whose interior was sufficiently replaced with nitrogen. While stirring the entire contents at 60°C, 0.72 parts of a 15% cyclohexane solution of n-butyllithium was added to initiate polymerization. After completion of the dropwise addition of the n-butyllithium solution, the entire contents were further stirred at 60° C. for 60 minutes. The polymerization conversion rate at this time measured by gas chromatography was 99.5%.

[0139] Next, 25.0 parts of dehydrated isoprene was added to the reaction liquid, and stirring was continued for 30 minutes. At this point, the polymerization conversion rate was 99.5%.

[0140] Then, 37.5 parts of dehydrated styrenes were further added, and it stirred for 60 minu...

reference example 2

[0147] ・Manufacture of hydrogenated block copolymer [D2]

[0148] (Manufacture of block copolymer [C2])

[0149] Divide styrene and isoprene into 5 times, sequentially add 30.0 parts of styrene, 7.5 parts of isoprene, 25.0 parts of styrene, 7.5 parts of isoprene and 30.0 parts of styrene, except Except that, the polymerization reaction was performed in the same manner as in Reference Example 1, and the reaction was terminated. The obtained block copolymer [C2] had a weight average molecular weight (Mw) of 61600, a molecular weight distribution (Mw / Mn) of 1.06, and wA:wB=85:15.

[0150] (Manufacture of hydrogenated block copolymer [D2])

[0151] Next, the above polymer solution was hydrogenated in the same manner as in Reference Example 1. The weight average molecular weight (Mw) of the hydrogenated block copolymer [D2] after the hydrogenation reaction was 65300, and the molecular weight distribution (Mw / Mn) was 1.07.

[0152] After the completion of the hydrogenation react...

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Abstract

The present invention is a multilayer film in which a layer formed of a resin composition [E'] is laminated on one or both surfaces of a film [F] formed of a resin composition [E] and a method for producing the same [F'], the resin composition [E] is prepared by adding ultraviolet rays to the hydrogenated block copolymer [D] in which 90% or more of the unsaturated bonds of the specific block copolymer [C] are hydrogenated. Absorbent, the specific block copolymer [C] contains at least two polymer blocks [A] mainly composed of repeating units derived from aromatic vinyl compounds and chain conjugated diene At least one polymer block [B] whose repeating unit is the main component, the resin composition [E'] relative to 100 parts by weight of the specific block copolymer hydrogenated product [D'] and / or in the block The modified block copolymer hydrogenated product [D"] obtained by introducing an alkoxysilyl group into the block copolymer hydrogenated product [D'] contains 0 weight part or more and less than 1.0 weight part of an ultraviolet absorber, and the specified The hydrogenated block copolymer [D'] comprises at least 2 polymer blocks [A'] mainly composed of repeating units derived from aromatic vinyl compounds and repeating units derived from chain-like conjugated diene compounds At least one polymer block [B'] as the main component.

Description

technical field [0001] The present invention relates to a multilayer film comprising a film layer formed of a resin composition in which a UV absorber is blended with a hydrogenated specific block copolymer, and a method for producing the same. Background technique [0002] A block copolymer derived from an aromatic ring has been disclosed which is composed of a polymer block mainly composed of a repeating unit derived from an aromatic vinyl compound and a polymer block containing a repeating unit derived from a chain conjugated diene compound. The hydrogenated block copolymer hydrogenated with the double bond of diene is excellent in transparency, low birefringence, heat resistance, low moisture absorption, etc., and the film obtained by extrusion molding it is used as a liquid crystal display Optical films such as polarizing films and retardation films of devices are useful (Patent Documents 1 to 5). [0003] In a liquid crystal display device, polarizing films are arrang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/28B29C47/06B32B27/18B29K25/00B29L9/00B29C48/07B29C48/21B29C48/37B29C48/92
CPCB32B27/08B32B27/30B32B2270/00B32B2307/202B32B2307/412B32B2307/71B32B2457/20B29K2995/0055B29K2055/00B29D7/01B29K2105/0044B29C48/92B29C2948/92704B29C48/07B29C48/0021B29C48/21B29C48/37B29C48/387B29C2948/92647B29C2948/92942
Inventor 小原祯二石黑淳齐藤大辅
Owner ZEON CORP
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