KR20180016814A - Sponge sheet for cosmetic puff and method of preparing the same - Google Patents

Abstract

The present invention relates to a sponge sheet for a cosmetic puff and a method of preparing the same. According to the present invention, it is possible to provide a sponge sheet for a cosmetic puff having improved flexibility and alcohol resistance at the same time. The sponge sheet comprises a polyurethane resin composition.

Description

Technical Field [0001] The present invention relates to a sheet for puffing and a method for manufacturing the same,

The present invention relates to a padding sheet comprising an aqueous polyurethane resin, and relates to a padding sheet having flexibility and alcohol resistance.

The present invention also relates to a process for producing the above-described puffing sheet.

Depending on the material used for the main structure, the puff can be classified into a velvet-like fabric puff, a NBR (Nitrile-butadiene rubber) latex sponge puff, a dry urethane foam sponge puff, and a wet urethane sponge puff, among which an aqueous polyurethane resin For example, those made of a poultry sheet by forming a polyurethane porous body through mechanical mixing or a mechanical foaming machine.

However, in the case of a puff made of an aqueous polyurethane, there is a problem that the alcohol resistance (ethanol resistance, methanol resistance, isopropyl alcohol (IPA) resistance) deteriorates. Accordingly, the present invention aims to solve the above problems and to provide a solution for the production of the puffing sheet having improved flexibility characteristics.

An object of the present invention is to provide a poultry sheet.

It is still another object of the present invention to provide a method for producing the poultry sheet.

In order to solve the above-described problems, the present invention provides a process for producing a polyol compound, which comprises reacting 50 to 70 parts by weight of a polycarbonate polyol having a number average molecular weight of 1,000 to 3,000 and 30 to 50 parts by weight of a polyether polyol having a number average molecular weight of 1,000 to 3,000, Polyurethane resin composition prepared by further adding at least one crosslinking agent selected from the group consisting of aliphatic block polyisocyanate, HDI modified polyisocyanate, and hydrophilic aliphatic polyisocyanate to a polyurethane resin containing a polyisocyanate The present invention provides a method for producing a puffed sheet.

According to one embodiment, the present invention can further comprise a porosity regulator comprising a mixture of 25 to 50% aqueous solution of sodium alkylsulfosuccinate and a fatty acid ammonium salt.

According to another embodiment, the method for producing a poultry sheet according to the present invention comprises

1) coating and drying the foamed liquid of the polyurethane resin onto a release paper;

2) thermosetting after the step 1);

3) aging after the step 2) and

4) peeling off after step 3).

According to one embodiment, 2 to 6 parts by weight of the pore-controlling agent and 0.5 to 6 parts by weight of the crosslinking agent may be further added to 100 parts by weight of the total composition.

According to one embodiment, the bulk density of the poultry sheet may be 0.1 to 0.3 g / cm < ³ >.

The puffing sheet according to the present invention has the effect of improving the durability of the puffing sheet by improving the resistance to alcohol degradation of the puffing sheet composed of the conventional aqueous polyurethane resin by improving flexibility and alcohol resistance have.

1 is a scanning electron microscope (SEM) photograph of the cross section of a sheet for puffing.
2 is a flow chart showing a method for producing a puffing sheet.
3 is a view showing a manufacturing step of the method for producing a puffing sheet.
4 is a view showing the peeling step of the puffing sheet.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a puffing sheet according to an embodiment of the present invention and a method for producing the same will be described in detail.

The padding sheet according to the present invention comprises

Based on 100 parts by weight of the total polyol compound,

50 to 70 parts by weight of a polycarbonate polyol having a number average molecular weight of 1000 to 3000 and

And 30 to 50 parts by weight of a polyether polyol having a number average molecular weight of 1000 to 3000. The present invention also provides a method for producing a poultry sheet.

The molecular weight may specifically be a number average molecular weight of 1000 to 2000. If the molecular weight is small, the flexibility may be deteriorated and the alcohol resistance may be lowered.

The content of the polycarbonate polyol may be 50 to 65 parts by weight based on 100 parts by weight of the total amount of the polyol compound. When the content of the polycarbonate polyol is less than 100 parts by weight, the flexibility may be improved, but alcohol resistance may be deteriorated. The alcoholicity may be improved, but the flexibility may be lowered.

The content of the polyether polyol may be 30 to 50 parts by weight, and more preferably 35 to 50 parts by weight, based on 100 parts by weight of the polyol compound.

In the case of a polyester-based polyol or a polycaprolactone-based polyol, flexibility and alcohol resistance are intermediate between the polycarbonate polyol and the polyether polyol, but may be lower than the hydrolysis-resistant polycarbonate-based polyol, and the adipate- In the case of making a water-based resin which is produced by using alone, there may arise a problem in durability such as hydrolysis resistance and fastness to sweat fastness.

According to one embodiment, it may contain at least one member selected from the group consisting of aliphatic or alicyclic diisocyanates and aromatic diisocyanates. Specifically, when an aliphatic or alicyclic diisocyanate is used, the light resistance, It is possible to improve the NOx resistance and, when an aromatic diisocyanate is used, problems such as discoloration may occur.

According to one embodiment, a porosity regulator may be further added in the production of the puffing sheet according to the present invention, wherein the porosity regulator is a mixture of a 25 to 50% aqueous solution of sodium alkylsulfosuccinate and a fatty acid ammonium salt ). ≪ / RTI > The sodium alkylsulfosuccinate can include, for example, at least one of sodium ethylnucleosulfur sulfosuccinate, sodium dioctylsulfosuccinate. The fatty acid ammonium salt includes, for example, at least one of distearyldimethylammonium chloride, dihexadecyldimethylammonium chloride, distearyldimethylammonium bromide, distearyldiisopropylammonium chloride, distearyldimethylammonium sulfate, can do. The content of the pore-controlling agent may be 2 to 6 parts by weight based on the total weight of the composition.

According to one embodiment, the present invention may further include an isocyanate crosslinking agent. For example, the crosslinking agent may include an aliphatic block polyisocyanate, an HDI modified polyisocyanate, a hydrophilic aliphatic polyisocyanate, etc. . ≪ / RTI > The aliphatic block polyisocyanate may specifically include at least one of MEK OXIM BLOCKED HDI, MEK OXIM BLOCKED IPDI, and MEK OXIM BLOCKED H12MDI. The HDI modified polyisocyanate may include at least one of HDI TRIMER, HDI DIMER, HDI BURET TYPE, and HDI ALLOPHANATE TYPE. The hydrophilic aliphatic polyisocyanate may include at least one of reacting HDI TRIMER with sodium sulfosuccinate, reacting HDI TRIMER with dimethylol propionic acid, and reacting HDI TRIMER with dimethylol butanoic acid. The content of the crosslinking agent may be 0.5 to 6 parts by weight based on 100 parts by weight of the total composition.

According to an embodiment of the present invention,

1) coating the release agent on the polyurethane resin with a foam mixture and drying the release agent;

2) thermosetting after the step 1);

3) aging after the step 2) and

The step (3) may further include a step of peeling, and the puffing sheet may be produced.

In a specific embodiment, the step of producing a poultice sheet according to the present invention is schematically shown in Fig. The sponge sheet of the present invention is produced by using a polyether polyol having a number average molecular weight of 1,000 to 2,000 and a polycarbonate polyol having a number average molecular weight of 1,000 to 2,000 and a low molecular weight diol compound having a number average molecular weight of 30 to 700 or less, At least one of HDI, H12MDI and IPDI as aliphatic diisocyanate or alicyclic diisocyanate and at least one of ethylene glycol diisocyanate, butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,3-propanediol, cyclohexanediol, , A dihydroxy compound having a carboxylic acid group or a dihydroxy compound having a sodium sulfonate group is reacted with at least one of dimethylolpropionic acid, dimethylolbutanoic acid and sodium dimethylol sulfonate to prepare a prepolymer, and then a dihydroxy compound having a carboxylic acid group As the neutralizing agent, triethylamine, diisopropylamine, triisopropylamine, Methyleneethanolamine, triethanolamine, and triisopropylamine, and as the diamine compound as a chain extender, at least one of ethylenediamine, 1,6-hexamethylenediamine, isophoronediamine, H12MDA, cyclohexanediamine, A thickener, a crosslinking agent, and a colorant are added to an aqueous polyurethane polymerized by chain elongation in water containing at least one of an acid generator, a hydrazine, an acid dihydrazide, and a hydrazine, and the mixture is thickened to a required viscosity, (30 ° C.), a viscosity of 20,000 cps to 40,000 cps and an apparent specific gravity of 0.20 g / cm ³ to 0.30 g / cm ³ is applied to the release paper 10 by means of a knife, a roll or a comma coater 20, To a thickness of 1.0 to 1.4 mm. The compounding liquid coated on the release paper is dried in a drying oven 40 of 30 ° C to 100 ° C or lower and cured in a heat curing oven 50 of 80 ° C to 180 ° C for thermal curing, And can be wound on the winding roller 70 in a semi-finished product. Thereafter, the ripening product is aged at room temperature for 24 hours. At the end of the ripening step, the release paper 120 is peeled off from the semi-finished product 110 to wind up the puffing sponge sheet 130 in the form of a roll.

The coloring agent may be an organic or inorganic pigment dispersed in a water-dispersible resin, but is not limited thereto. The coloring agent may be added in an amount of 0.1 to 10 parts by weight, for example, 1 to 5 parts by weight, based on 100 parts by weight of the total composition.

The thickener may be an anionic aqueous polyacrylic resin, for example, Borchi Gel A LA (Borchers), but is not limited thereto. The thickener may be used in an amount of 0.1 to 10 parts by weight, for example, 0.5 to 10 parts by weight, To 5 parts by weight.

According to one embodiment, the bulk density of the poultry sheet according to the present invention may be from 0.1 to 0.3 g / cm ³ , for example from 0.18 to 0.22 g / cm ³ . When the apparent density is low, the strength may be low, and when the apparent density is high, flexibility may be deteriorated.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments and drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. The configuration and operation of the present invention shown in the drawings and described by the drawings are described as at least one embodiment, and the technical idea of the present invention and its core configuration and operation are not limited thereby.

Production Example 1: Preparation of aqueous polyurethane resin A

83.22 g of a polycarbonate polyol having a number average molecular weight of 2000, 83.22 g of a butylene adipate-based polyester polyol having a number average molecular weight of 1000, 83.22 g of a polytetramethylene ether glycol polyol having a number average molecular weight of 1000, 13.39 g of 1,4- To 18.02 g of butanoic acid, 104.92 g of hexamethylene diisocyanate was added and the mixture was allowed to react at 80 to 90 ° C. The reaction is continued until the NCO content of the prepolymer is 2.90% (theoretical value: 3.17%).

Thereafter, the temperature is lowered to 40 to 50 DEG C, and 54.27 g of distilled water and 11.07 g of triethylamine dissolved therein are added to neutralize. Then, 5.97 g of ethylenediamine was dissolved in 542.71 g of distilled water and chain extension was carried out.

The resin (A) synthesized by this method had a solid content of 40 ± 2%, a 100% modulus of 2 MPa and a tensile strength of 30 MPa. The content of the polycarbonate was 33.3%. The content ratio of the polyester polyol was 33.3%, and the content ratio of the polyether polyol was 33.3%.

Production Example 2: Preparation of aqueous polyurethane resin B

83.22 g of a polycarbonate polyol having a number average molecular weight of 2000, 166.43 g of a polytetramethylene ether glycol polyol having a number average molecular weight of 1000, 13.39 g of 1,4-butanediol, 18.02 g of dimethylol butanenoic acid and 104.92 g of hexamethylene diisocyanate, The reaction is carried out at a temperature of 80 to 90 占 폚. The reaction is continued until the NCO content of the prepolymer is 2.90% (theoretical value: 3.17%).

Thereafter, the temperature is lowered to 40 to 50 DEG C, and 54.27 g of distilled water and 11.07 g of triethylamine dissolved therein are added to neutralize. Then, 5.97 g of ethylenediamine was dissolved in 542.71 g of distilled water and chain extension was carried out.

The solids content of resin (B) synthesized by this method was 40 ± 2%, 100% modulus was 2 MPa, tensile strength was 25 MPa, and the content of polycarbonate was 50% relative to the total polyol used. The content of the polyether polyol was 50%.

Preparation Example 3: Preparation of aqueous polyurethane resin C

83.22 g of a polycarbonate polyol having a number average molecular weight of 2000, 166.43 g of a polycarbonate polyol having a number average molecular weight of 1000, 13.39 g of 1,4-butanediol, 18.02 g of dimethylol butanone acid and 104.92 g of hexamethylene diisocyanate, 90 C < / RTI > The reaction is continued until the NCO content of the prepolymer is 2.90% (theoretical value: 3.17%). Thereafter, the temperature is lowered to 40 to 50 DEG C, and 54.27 g of distilled water and 11.07 g of triethylamine dissolved therein are added to neutralize. Then, 5.97 g of ethylenediamine was dissolved in 542.71 g of distilled water and chain extension was carried out.

The solids content of resin (C) synthesized by this method was 40 ± 2%, 100% Modulus was 5 MPa, tensile strength was 50 MPa, and the content of polycarbonate was 100% relative to the total polyol used.

Examples and Comparative Examples

Each composition was compounded and thickened with the composition according to Tables 1 and 2, and then foamed with a mechanical foaming machine to adjust the viscosity to 30,000 to 35,000 cps at 27 ° C. The adjusted foamed liquid foam was coated on the release paper to a thickness of 1.2 mm, dried in a drying oven at 70 캜 for 10 minutes, dried in a heat curing oven at 155 캜 for 6 minutes, allowed to stand at room temperature for 24 hours, To prepare respective sponge sheets. The unit is parts by weight.

The porosity regulator (JIS-TS and RS, Jintintec) was used, and the thickener was Borchi Gel A LA and Borchers. The apparent density of the fabricated sponge sheet is shown in Table 1.

division Aqueous polyurethane resin pore
Modulator Thickener Cross-linking agent Apparent density
(g / cm ³⁾ A B C One 2 3 Example 1 - 89.8 - 4.8 0.9 4.5 - - 0.20 Example 2 - 89.8 - 4.8 0.9 - - 4.5 0.20 Example 3 - 62.9 26.9 4.8 0.9 - - 4.5 0.19 Example 4 - 89.8 - 4.8 0.9 - 4.5 - 0.18 Comparative Example 1 94.1 - - 5.0 0.9 - - - 0.19 Comparative Example 2 89.8 - - 4.8 0.9 - 4.5 - 0.21 Comparative Example 3 - 94.1 - 5.0 0.9 - - - 0.19 Comparative Example 4 - 44.9 44.9 4.8 0.9 - - 4.5 0.21 Comparative Example 5 - 26.9 62.9 4.8 0.9 - - 4.5 0.18

Crosslinker-1: Aliphatic block polyisocyanate (Blocked polyisocyanate)

Cross-linker-2: HDI modified polyisocyanate (HDI-based modified polyisocyanate)

Cross-linker-3: hydrophilic aliphatic polyisocyanate

division PC content ratio (%) Example 1 50 Example 2 50 Example 3 65 Example 4 50 Comparative Example 1 33 Comparative Example 2 33 Comparative Example 3 50 Comparative Example 4 75 Comparative Example 5 85

The PC content ratio means the ratio (%) of the polycarbonate content in the polyol compound of the aqueous polyurethane resin used as the composition.

Experimental Example 1: Measurement of alcohol resistance

In order to examine the alcohol resistance of each sponge sheet, methanol, ethanol and isopropyl alcohol (IPA) were dropped to the sheet specimen in 3 drops, and the reciprocating friction tester (load: 100 g) The deformation of the posterior surface was observed and is shown in Table 3 below. The results shown in Table 3 are marked as very good, good, moderate or very bad depending on the degree of melting or swelling of the sheet.

Each of the sponge sheet specimens has an apparent density of 0.2 0.02 g / cm ³ and a thickness of 0.6-0.8 mm.

Experimental Example 2: Flexibility measurement

The flexibility of each sponge sheet was measured in 100% M of the sponge sheet specimen and is shown in Table 3 below. This value is the strength when the sponge sheet specimen is stretched at 100%, and the distinction is as follows.

100% When M is less than 0.12 MPa: Flexible

100% When M is 0.12 MPa or more and less than 0.17 MPa: Hardness

100% If M is more than 0.17 MPa: very hard

division Alcoholic flexibility My Methanolicity My ethanolic My IPA castle Example 1 Very good Very good Very good tenderness Example 2 Very good Very good Very good tenderness Example 3 Very good Very good Very good tenderness Example 4 Very good Very good Very good tenderness Comparative Example 1 Very bad Very bad Very bad Very hard Comparative Example 2 usually usually usually Very hard Comparative Example 3 Very good Very good Good tenderness Comparative Example 4 Very good Very good Very good crustiness Comparative Example 5 Very good Very good Very good Very hard

As can be seen from the above Table 3, it can be seen that the sponge sheets according to Examples 1 to 4 of the present invention exhibit excellent alcohol resistance and flexibility at the same time.

10: release paper
20: Foam compounding liquid and coater
30: FOAM GENERATOR
40: Drying oven
50: Thermal curing oven
60: cooling roller
70: Semifinished product and take-up roller
110: Semifinished product
120: release paper
130: Sponge sheet for puffing

Claims (5)

Based on 100 parts by weight of the total polyol compound,
50 to 70 parts by weight of a polycarbonate polyol having a number average molecular weight of 1000 to 3000 and
And 30 to 50 parts by weight of a polyether polyol having a number average molecular weight of 1,000 to 3,000 is added to the polyurethane resin from the group consisting of aliphatic block polyisocyanate, HDI modified polyisocyanate (HDI-based Modifide Polyisocyanate), hydrophilic aliphatic polyisocyanate Wherein at least one crosslinking agent selected from the polyurethane resin composition is further added. The method according to claim 1,
Wherein a porosity regulating agent is further added which comprises a mixture of 25 to 50% aqueous solution of sodium alkylsulfosuccinate and a fatty acid ammonium salt. The method according to claim 1,
1) coating the release agent on the polyurethane resin with a foam mixture and drying the release agent;
2) thermosetting after the step 1);
3) aging after the step 2) and
4) The method of manufacturing a poultry sheet according to any one of the above items 1 to 4, further comprising a step of peeling off after the step 3). The method according to claim 1,
Wherein 2 to 6 parts by weight of a pore-controlling agent and 0.5 to 6 parts by weight of a crosslinking agent are further added to 100 parts by weight of the total composition. The method according to claim 1,
Wherein the paddy sheet has an apparent density of 0.1 to 0.3 g / cm < 3 >.

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