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Title:
THERMOPLASTIC POLYURETHANE HAVING CROSS-LINKING SITE, AND CROSS-LINKING FOAMING METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2017/195934
Kind Code:
A1
Abstract:
The present invention relates to a thermoplastic polyurethane composition having a cross-linking site, characterized in that foam can be prepared in a conventional EVA cross-linking foaming system by using a thermoplastic polyurethane having a cross-linking site provided in the molecules of a polyol and a chain extender. Since a thermoplastic polyurethane having a cross-linking site provided in the molecules of a polyol and a chain extender are used, the present invention has a melt viscosity facilitating processing, which is a process of low-temperature processing to which a conventional EVA cross-linking foaming system is applied, at a processing temperature of approximately 130°C or lower, and thus there are effects of having smooth mixing with a cross-linking agent, a foaming agent and various additives, facilitating, by means of the cross-linking site provided in the molecules of a polyol and a chain extender, the formation of foam cells during cross-linking foaming through press molding or injection molding, exhibiting excellent mechanical properties, and enabling foam having various ranges of viscosity according to the amount of a foaming agent to be manufactured.

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Inventors:
NAM SANG CHUL (KR)
LEE SANG YUN (KR)
HAN DAE SANG (KR)
UM GI YONG (KR)
BAE JONG WOO (KR)
SHIN JIN HO (KR)
KIM SEONG-HYE (KR)
Application Number:
PCT/KR2016/008182
Publication Date:
November 16, 2017
Filing Date:
July 27, 2016
Export Citation:
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Assignee:
DONGSUNG CORP (KR)
International Classes:
C08L75/04; C08G18/34; C08G18/42; C08G18/72; C08J3/24; C08J9/04
Foreign References:
JP2826906B21998-11-18
JP2013010920A2013-01-17
JP2013227519A2013-11-07
JP2013122007A2013-06-20
KR100611686B12006-08-14
KR100611686B12006-08-14
KR100652130B12006-12-01
Other References:
See also references of EP 3456783A4
Attorney, Agent or Firm:
STY PATENT LAW FIRM (KR)
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