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Thermoplastic polyurethane film and preparation method therefor

一种聚氨酯膜、热塑性的技术，应用在热塑性聚氨酯膜及其制备领域，能够解决难以制备厚的聚氨酯膜、不容易控制热塑性聚氨酯膜物理特性等问题，达到耐久性优异的效果

Active Publication Date: 2019-09-13
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a polyurethane solution having a low solid content may not be applied to a substrate to have a predetermined thickness or more, there is a problem that it is difficult to prepare a thick polyurethane film
In addition, since it is difficult to perform additional polymerization reactions on polyurethane pellets, there is a problem that it is not easy to control the physical properties of thermoplastic polyurethane films prepared from polyurethane solutions, and it is necessary to use highly toxic solvents to dissolve polyurethane pellets with high molecular weight

Method used

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  • Thermoplastic polyurethane film and preparation method therefor
  • Thermoplastic polyurethane film and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Preparation of polyurethane resin composition

[0074] Prepare polycarbonate diol (PCDL, Asahi Kasei Chemicals Corporation) having a number average molecular weight of 2,050 g / mol as a polyol, 1,4-butanediol (1,4BD, manufactured by BASF Industries) as a chain extender, As the first isocyanate-based curing agent, H12MDI containing 2 isocyanate functional groups (manufactured by Evonik Industries), as the second isocyanate-based curing agent, isophorone diisocyanate (IPDI, manufactured by Evonik Industries), as a catalyst Dibutyltin laurate (DBTDL) and methyl ethyl ketone as organic solvent. Thereafter, a mixture wherein the content of the polyol is about 70.03% by weight, the content of the chain extender is about 6.64% by weight, and the content of the second isocyanate-based curing agent is about 23.33% by weight is prepared, and by adding 100 parts by weight of the mixture Mixed with about 50 parts by weight of an organic solvent to prepare a mixed solution.

[0075...

Embodiment 2 to 4

[0079] A thermoplastic polyurethane film was prepared in the same manner as in Example 1, except that, in order to prepare the polyurethane resin composition, a polyol, a chain extender, a first isocyanate-based curing agent, a second based Curing agent and catalyst for isocyanates. In Table 1 below, TKA-100 is a trifunctional isocyanate-based curing agent manufactured by Asahi Kasei Chemicals Corporation.

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Abstract

The present invention relates to: a thermoplastic polyurethane film that has a high ultimate tensile strength, that is, an ultimate tensile strength of 50 MPa to 80 MPa inclusive, and thus has excellent durability; and a preparation method therefor.

Description

technical field [0001] This specification claims priority and benefit from Korean Patent Application No. 10-2017-0038384 filed in the Korean Intellectual Property Office on March 27, 2017, the entire contents of which are incorporated herein by reference. [0002] The present invention relates to a thermoplastic polyurethane film having excellent durability and a method for producing the same. Background technique [0003] Thermoplastic Polyurethane (TPU) films are excellent in mechanical properties such as strength, tensile properties, toughness, and abrasion resistance, and thus are mainly used in the automotive field. [0004] Typically, a polyurethane solution is prepared by dissolving extruded and molded polyurethane pellets in a solvent, and a thermoplastic polyurethane film is prepared by applying the polyurethane solution to a substrate. However, since polyurethane pellets having a high molecular weight do not dissolve well in a solvent, the prepared polyurethane so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C09D175/04C08L75/04
CPCC08J5/18C08L75/04C09D175/04C08J7/0427C08J2367/02C08J2475/04C08J2375/04C08K5/0025C08K5/21
Inventor 李相圪洪周希朴世贞金相还金章淳
Owner LG CHEM LTD
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