KR20030008250A - Water distribution polyurethan resin of solidifying type by steam and heat - Google Patents

Abstract

PURPOSE: A water-dispersive polyurethane resin is provided, which is solidified by steam and heat, is improved in the solidification velocity and is used to prepare a synthetic leather with good surface coating and toughness. CONSTITUTION: The water-dispersive polyurethane resin comprises 100 parts by weight of a water-dispersive polyurethane resin consisting of 70 wt% of water and 30 wt% of a solid component; 0.01-35 parts by weight of a steam solidification additive containing 1 mol of an ammonia salt based on about 0.001-10 mol of liquid ammonia (based on the amount of ammonia); about 5-15 parts by weight of a toner; and about 0-10 parts by weight of an urethane-based thickener.

Description

Water distribution polyurethan resin of solidifying type by steam and heat}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-dispersed polyurethane resin, and more particularly, to impregnating a nonwoven fabric primarily in manufacturing artificial leather, which is widely used in shoes, bags, various sundries, and sporting goods, and having a second viscosity (2,000 to 10,000). The present invention is to provide a coagulated water-dispersible polyurethane resin by steam and heat used as an artificial leather composition which can be manufactured at low cost by coating a water-dispersed polyurethane resin with high cps).

In general, in order to manufacture artificial leather, artificial leather is manufactured using oil-based resins composed of 70% DMF and 30% polymer in nonwoven fabrics.

Among the oil-based resins used in the composition of the existing artificial leather, DMF is very toxic and environmentally invasive composition has been said that the use of such DMF should be actively refrained.

Accordingly, the present invention provides an environmentally friendly water-dispersible polyurethane resin to be used when manufacturing artificial leather (or sponge, etc.), and in the present invention, in particular, when manufacturing artificial leather and the like, The present invention has been completed by providing a water-dispersible polyurethane resin that can be solidified, and providing a coagulated water-dispersible polyurethane resin by steam and heat which can provide an artificial leather having excellent solidification rate and surface coating. .

The production method of the water-dispersed polyurethane resin used in the solidified water-dispersed polyurethane resin by steam and heat provided by the present invention is artificially made using the water-dispersed polyurethane that has been filed by the inventor (application number: 10-1998-0055543). Since it is disclosed in detail in the manufacturing method of leather, description thereof will be omitted.

Usually, the water-dispersed polyurethane resin is a resin in which a polyurethane resin is dispersed in water and a content of 30% solids and 70% water as a dispersion medium.

The polyurethane dispersed in the water is anionic and has a coagulation property by acid.

As described above, in addition to ammonia water (ammoniua solution) as a steam coagulation-type raw material to the water-dispersed polyurethane resin prepared by the conventional manufacturing method, it is used as a raw material of the coagulant additive.

Various ammonia salts can be selected and used as follows.

Ammonium acetate, ammonium benzoate, ammonium alum, ammonium aurin tricarboxylate, ammonium bicarbonate, ammonium bichromate, ammonium bifluoride, ammonium biphosphate, ammonium boronoxide, ammonium bromide, ammonium carbonate, ammonium cerium (IV) sulfate (dihydrate, cerous) sulfate, ammonium chloride, ammonium chlorozincate, ammonium citrate, ammonium cobaltous sulfate, ammonium cupric chloride, ammonium dichromate, ammonium dihydrogen phosphate, ammonium ferric sulfate, ammonium ferrous sulphate, ammonium fluoroborate, ammonium fluorosilicate, ammonium ammonium formateium ammonium formateium hydrogen carbonate, ammonium hydrogen fluoride, ammonium hydroxide, ammonium iodide, ammonium iron (II) sulfate, ammonium iron (III) sulfate 12-water, ammonium metavanadate, ammonium molybdate, ammonium muriate, ammonium nikel (III) sulfate hexahydrate, ammonium nitrate, ammonium nitrate-fuel oil mixture, ammonium nitrosophenylhydroxylamin e, ammonium N-nitrosophenyl hydroxylamine, ammonium oxalate, ammonium paramolybdate, ammonium pentaborate, ammonium pentaborate octahydrate, ammonium peroxodisulfate, ammonium peroxysulfate, ammonium persulfate, ammonium phosphate, ammonium rhodanide, amternmonium ammonium sulfate Ammonium sulfocyanate, ammonium sulfocyanide, ammonium tartrate, ammonium tetrachloro cuprate (II), ammonium tetrafluoroborate, ammonium thiocyanate, ammonium thioglycolate, ammonium tungstate, and ammonium vanadate are selectively used.

The method of preparing the coagulant additive is prepared by mixing ammonia salt (1 mole) with 25% ammonia water (0.001 mol to 10 moles of ammonia), and the coagulant is prepared in about 0.01 to 100 parts of an anionic water-dispersed polyurethane resin. When 35 parts are added and mixed, it is stable at room temperature, and a solidified dispersion polyurethane resin is formed by steam and heat.

The above-described steam and heat-coagulated water-dispersed polyurethane resin of the present invention, which is formed as described above, is used for various purposes, but in particular, the impregnated water-dispersed polyurethane resin is first impregnated to manufacture artificial leather. "For use as;

100 parts of water-based polyurethane resin,

5 to 15 parts of toner,

0-4 parts of urethane type thickener,

0.1-20 parts of coagulant

Each mixture is used to form an impregnated water dispersion polyurethane resin.

And also to prepare a "coated water-dispersed polyurethane resin" which is secondarily coated to produce artificial leather;

100 parts of water-based polyurethane resin,

5 to 15 parts of toner,

1-10 parts of urethane type thickener,

0.01-30 parts of coagulant

Mixing is to use a coating type water dispersion polyurethane resin composition.

In the present invention, the water-dispersible polyurethane resin solidifies due to heat, but when solidified only by heat, the surface is not smooth, so that it solidifies at high temperature with moisture, so that the solidification speed and microporous cell formation and surface are shortened. It is a main feature of the invention to provide a water-dispersible polyurethane resin capable of obtaining an excellent film.

The coagulated water-dispersible polyurethane resin by steam and heat of the present invention, which can be formed as described above, is mainly dried by impregnating an impregnated water-dispersible polyurethane resin into a nonwoven fabric, and secondly coated when manufacturing artificial leather. It can be used as a main composition when manufacturing artificial leather at low cost by coating the type water-dispersed polyurethane resin to solidify the coated water-dispersed polyurethane resin at high temperature in the steam phase, and the water-dispersed polyurethane resin of the present invention An embodiment of manufacturing artificial leather by using will be described in more detail below.

Of course, the present invention will be described in the case of using the coagulated water-dispersed pulley polyurethane resin by steam and heat in the manufacture of artificial leather, but it will be found that the present invention can be variously applied in the related industrial field.

(Example 1)

The nonwoven fabric wound in the roll state was impregnated into the impregnated water-dispersed polyurethane resin fed into the impregnation tank and fed into the impregnation tank.

The nonwoven fabric impregnated with the impregnated water-dispersed polyurethane resin was compressed using a compression roller to have a water content of 50% relative to the nonwoven fabric, and then dried by passing through a dryer having a temperature of about 130 ° C.

The nonwoven fabric (ie, impregnated fabric) impregnated with the impregnated water-dispersed polyurethane resin via the dryer had a smooth surface and integrated with the nonwoven fabric.

The thickening agent is mixed on the upper surface of the impregnated fabric, and the coating type water-dispersed polyurethane resin-coated coating cloth coated with a knife cutter is coated with a knife cutter with a high viscosity such as honey at a thickness of 1 and 2 steam. Continuously charged into the chamber.

The internal temperature of the primary steam chamber was set to about 90 ° C, and the internal temperature of the secondary steam chamber was set to about 95 ° C. The coating-type water-dispersed polyurethane resin on the upper surface of the coated cloth via the steam chamber for 1st and 2nd time. The surface coating was completely solidified.

This is again put into the lower part of the 1st and 2nd steam chamber through the inverted roller to go through the complete solidification process to the inside of the surface coating, and then the cold water passes through the stored water tank to cool the heat by steam and at the same time coating The surface gloss cell was expanded to remove surface gloss, and the artificial leather was completed by winding the dehydrated artificial leather on a roll by passing it through a dehydration roller at the water tank end.

The manufactured artificial leather had a matte leather texture as it was, and the surface texture was very soft, and an excellent artificial leather obtained by embodying the surface texture of the artificial leather manufactured by the existing method was obtained.

(Example 2)

In the same manner as in Example 1, the coating-type water-dispersed polyurethane resin impregnated, dried, and a thickener mixed with the impregnated water-dispersed polyurethane resin on the nonwoven fabric was coated with a knife after passing through the first and second steam chambers. After pressing the rollers together with the release paper on which the specific patterns of irregularities were formed, they were integrated with each other, and after 10 hours at a temperature of about 70 to 80 ° C., the release paper was separated from the artificial leather.

The surface texture of the manufactured artificial leather was very smooth, and the surface texture of the artificial leather manufactured by the existing method was realized as it is, and the unevenness formed on the release paper was coated on the water-dispersed polyurethane resin coated on the surface of the artificial leather. The specific pattern of the phase was transferred as it is, and the artificial leather of the uneven shape having excellent design could be obtained.

As described in detail above, the water-dispersed polyurethane resin provided in the present invention provides an eco-friendly water-dispersed polyurethane resin, which can be used as a main composition when manufacturing artificial leather, thereby making a breakthrough in the field of artificial leather manufacturing. When using the water-dispersed polyurethane resin composition according to the present invention can be produced environmentally friendly artificial leather, thereby reducing the artificial leather of the artificial leather manufacturing equipment and thereby reducing the installation cost of man-made artificial leather It is possible to provide such that the expected effect is a great invention.

Claims (2)

100 parts of well-known water-dispersed polyurethane resin consisting of 70% water and 30% solids, 0.01 to 35 parts of a steam coagulant, in which ammonia water is mixed with about 0.001 to 10 moles of ammonia, and 1 mole of ammonia salt, A coagulated water-dispersible polyurethane resin produced by steam and heat, comprising about 5 to 15 parts of toner and about 0 to 10 parts of a urethane thickener. The method of claim 1; The ammonia salt is ammonium acetate, ammonium benzoate, ammonium alum, ammonium aurin tricarboxylate, ammonium bicarbonate, ammonium bichromate, ammonium bifluoride, ammonium biphosphate, ammonium boronoxide, ammonium bromide, ammonium carbonate, ammonium cerium (IV) sulfate (dihydrate, tetrahydrate), ammonium cerous sulfate, ammonium chloride, ammonium chlorozincate, ammonium citrate, ammonium cobaltous sulfate, ammonium cupric chloride, ammonium dichromate, ammonium dihydrogen phosphate, ammonium ferric sulfate, ammonium ferrous sulphate, ammonium fluoroborate, ammonium fluoroptsi ammonium fluoromonate , ammonium hydrogen carbonate, ammonium hydrogen fluoride, ammonium hydroxide, ammonium iodide, ammonium iron (II) sulfate, ammonium iron (III) sulfate 12-water, ammonium metavanadate, ammonium molybdate, ammonium muriate, ammonium nikel (III) sulfate hexahydrate, ammonium nitrate, ammonium nitrate-fuel oil mixture, ammonium nitr osophenylhydroxylamine, ammonium N-nitrosophenyl hydroxylamine, ammonium oxalate, ammonium paramolybdate, ammonium pentaborate, ammonium pentaborate octahydrate, ammonium peroxodisulfate, ammonium peroxysulfate, ammonium persulfate, ammonium phosphate, ammonium amrhoiumdemonium ammonium ammonium sulfate, Steam and heat solidified water-dispersed polyurethane, characterized by the use of ammonium sulfocyanate, ammonium sulfocyanide, ammonium tartrate, ammonium tetrachloro cuprate (II), ammonium tetrafluoroborate, ammonium thiocyanate, ammonium thioglycolate, ammonium tungstate, and ammonium vanadate Suzy.