Title:
HYDROPHILIC WATER-DISPERSED POLYURETHANE RESIN FOR TEXTILE SKIN COATING AND METHOD FOR PRODUCING HYDROPHILIC FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/182104
Kind Code:
A1
Abstract:
The present invention relates to a hydrophilic water-dispersed polyurethane resin for textile skin coating and a method for producing a hydrophilic film using the same. The hydrophilic water-dispersed polyurethane resin for textile lamination skin coating according to the present invention is produced by: preparing an ionic pre-polymer consisting of (a) 10 to 30% by weight of a hydrophobic polyol, (b) 10 to 40% by weight of a hydrophilic polyol, (c) 5 to 10% by weight of a propylene oxide/ethylene oxide (PO/EO) coploymer, (d) 2 to 10% by weight of a reactive organosilicon compound, (e) 1 to 5% by weight of a chain extender, (f) 1 to 5% by weight of 2,2-bis (hydroxymethyl) propanoic acid (DMPA), and (g) 20 to 50% by weight of diisocyanate; dispersing the ionic pre-polymer in water containing (h) 1 to 5% by weight of a neutralizing agent to prepare a prepolymer dispersion; and then adding (i) 2 to 8% by weight of a chain extender thereto and reacting the same. The method for preparing a hydrophilic film for textile lamination skin coating according to the present invention comprises the steps of: coating a release paper with a polyurethane resin composition obtained by applying 2 to 6 parts by weight of at least one curing agent selected from blocked hexamethylene diisocyanate/isophorone diisocyanate (blocked HDI/IPDI) or methoxymethyl methylol melamine, 0.5 to 2 parts by weight of a curing accelerator, 0 to 5 parts by weight of a quencher, 0.5 to 2 parts by weight of a silicone dispersion, 0 to 5 parts by weight of a thickener, and 0 to 3 parts by weight of a defoaming agent, based on 100 parts by weight of the hydrophilic water-dispersed polyurethane resin, followed by drying treatment to form a casting film on the release paper; and peeling the casting film off from the release paper, wherein the casting film has a water pressure resistance of 5,000 to 10,000 ㎜H2O and a moisture permeability of 3,000 to 11,000 g/㎡·day. The hydrophilic water-dispersed polyurethane resin for textile lamination skin coating according to the present invention has an effect that as the hydrophilic polyol and the hydrophilic polyol are used to react with the ionic pre-polymer to which the reactive organosilicon compound is applied, thereby adjusting the flowability and viscosity of the polyurethane resin within an optimal range for fiber coating, a stable coating layer can be formed by improving an increase in viscosity during the process of manufacturing a conventional hydrophilic water-dispersed polyurethane, and a disadvantage of poor processability due to viscosity adjustments in a final product and flow characteristics such as that of a cream phase. In addition, the hydrophilic film produced by the hydrophilic water-dispersed polyurethane resin for textile lamination skin coating of the present invention has the advantages of excellent moisture permeability, excellent film strength, and excellent water pressure resistance as well as no stickiness on the surface and a soft texture compared to conventional hydrophilic non-porous films.
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Inventors:
HAN YOUNG-CHUL (KR)
KIM DUCK-HAN (KR)
OH KYUNG-SEOK (KR)
YANG JEONG-HAN (KR)
KIM DUCK-HAN (KR)
OH KYUNG-SEOK (KR)
YANG JEONG-HAN (KR)
Application Number:
PCT/KR2017/008595
Publication Date:
October 04, 2018
Filing Date:
August 09, 2017
Export Citation:
Assignee:
V IX CO LTD (KR)
International Classes:
C08G18/48; C08G18/08; C08G18/10; C08J5/18; C08L75/08
Foreign References:
| JP2013543907A | 2013-12-09 | |||
| JP2007119749A | 2007-05-17 | |||
| JP2004010898A | 2004-01-15 | |||
| KR20060007057A | 2006-01-23 | |||
| JP2008121015A | 2008-05-29 |
Attorney, Agent or Firm:
YOO, Ho-ill (KR)
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