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Stereocomplex polylactic acid film and resin composition

A technology of stereocomplex and resin composition, applied in the field of optical stereocomplex polylactic acid film, can solve the problems of inappropriate use, depolarization of spherulites, etc., and achieve the effect of environmental friendliness and excellent transparency

Inactive Publication Date: 2013-07-03
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, for this stereocomplex polylactic acid, there are methods of further improving the transparency by controlling the flow in the extrusion process or using a nucleating agent (for example, Patent Documents 2, 3, and 4), but even if these techniques are used, in order to Obtaining sufficient transparency suitable for optical applications requires operations such as stretching of the film. For example, it is not suitable for polarizer protective films of polarizers that require low retardation, substrates of transparent conductive laminates, etc.
In addition, even when the haze is low, there are problems such as depolarization (depolarization) due to a crystal structure such as spherulites.

Method used

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  • Stereocomplex polylactic acid film and resin composition
  • Stereocomplex polylactic acid film and resin composition
  • Stereocomplex polylactic acid film and resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0169] The stereocomplex polylactic acid-based resin (A1) was vacuum-dried at 110° C. for 5 hours. Next, 0.3 parts by weight of the amide-based compound represented by the following formula (2), that is, "リカクリア (registered trademark)" PC1 manufactured by Nippon Rika Co., Ltd., is dry-blended with 100 parts by weight of the stereocomplex polylactic acid-based resin (A1) .

[0170] The blend was melt-kneaded at 230°C with an extruder, melt-extruded from a T-die at a die temperature of 230°C to form a film, and made to adhere and solidify on the surface of a cooling drum at 40°C. After that, peeling was performed, whereby a film was obtained. This film was further heat-set at a temperature of 125° C. to obtain a stereocomplex polylactic acid film. The resulting film was heat-treated at 120° C. for 60 minutes, and as a result, the absolute value of the dimensional change rate was 3% or less.

[0171]

Embodiment 2

[0173] Stereocomplex polylactic acid resin (A2) was vacuum-dried at 110°C for 5 hours, melted and kneaded at 230°C with an extruder, and melted and extruded from a T-die at a die temperature of 230°C. In the form of a film, it was adhered to the surface of a cooling drum at 40° C., solidified, and then peeled off to obtain a film. The obtained film was further heat-set at a temperature of 125° C. to obtain a stereocomplex polylactic acid film. The resulting film was heat-treated at 120° C. for 60 minutes, and as a result, the absolute value of the dimensional change rate was 3% or less.

Embodiment 3

[0175] The stereocomplex polylactic acid-based resin (A1) was vacuum-dried at 110° C. for 5 hours. Next, 0.4 parts by weight of an amide-based compound represented by the following formula (2) (Shin Nippon Chemical Co., Ltd. product "リカクリア (registered trademark)" PC1), and 0.8 parts by weight of an amide compound represented by the following formula (3) The cyclic carbodiimide compound with the structure is dry blended with 100 parts by weight of the stereocomplex polylactic acid resin (A1). The blend was melt-kneaded at 230°C with an extruder, melt-extruded from a T-die at a die temperature of 230°C to form a film, and made to adhere and solidify on the surface of a cooling drum at 40°C. After that, peeling was performed, whereby a film was obtained. The obtained film was further heat-set at a temperature of 125° C. to obtain a stereocomplex polylactic acid film. The resulting film was heat-treated at 120° C. for 60 minutes, and as a result, the absolute value of the dimens...

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Abstract

A stereocomplex polylactic acid resin composition that contains an amide compound represented by general formula (1), and a film that is formed from the stereocomplex polylactic acid resin composition. A stereocomplex polylactic acid film having excellent transparency and a resin composition can be provided. (In the formula, R1 represents a residue that is obtained by removing all carboxyl groups from a 1,2,3-propane tricarboxylic acid or a 1,2,3,4-butane tetracarboxylic acid; three or four R2 moieties may be the same as or different from each other and each represents a hydrogen atom or a linear or branched alkyl group having 1-10 carbon atoms; and k represents an integer of 3 or 4.)

Description

Technical field [0001] The present invention involves particularly transparently transparent three -dimensional complex polymapiline film and resin composition.Further involves a three -dimensional complexylic acid film that requires low phase differences. Background technique [0002] As a transparent polymer substrate used in optical uses, such as transparent polymer substrates for LCD display, touch panels, etc., it is known that there are cellulose membranes such as triathrof cellulose, polytin glycolic glycolic membrane.Polycolic membrane, polycarbonate film, etc. [0003] However, because these resin uses limited resources as the starting raw material, there is concerns about the depletion of oil resources. [0004] Recently, as a material to solve the above problems, the polystracking polymer was attracted to the eye, and many research and development were actually carried out.Since the starting raw material of polystracking polymer is plant raw materials such as corn, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J5/18C08K5/20C08L101/16
CPCC08J5/18C08J2367/04C08L2205/02C08K5/0083C08K5/20C08L67/04C08L101/16
Inventor 小野雄平内山昭彦大宅太郎
Owner TEIJIN LTD