KR101530628B1 - Hybrid water soluble dispersant composition - Google Patents

Abstract

Water-soluble fatty acid-modified polyester resins and water-soluble modified resins that prevent settling due to separation of the pigment contained in paints and inks with resins or solvents and improve physical properties such as color cohesion, color separation, color unevenness, Wherein the styrene maleic anhydride resin or the water-soluble modified styrene maleic anhydride ester resin is mixed in a weight ratio of 30:70 to 70:30.

Description

[0001] HYBRID WATER SOLUBLE DISPERSANT COMPOSITION [0002]

The present invention relates to an environmentally friendly hybrid water-soluble dispersant composition which imparts dispersion stability to organic and inorganic pigments used in water-soluble paints and inks.

The paint is composed of a resin, a pigment, a solvent, an additive, etc. In the paint or ink industry, the stability of the pigment dispersion is a physical property for giving uniformity of high quality and quality, Properties, and final coatings.

The process of dispersing pigments is difficult and time consuming and energy intensive in the paint production process. This is because the surface tension between the resin, the solvent and the pigment or the extender pigment is different and the phenomenon of agglomeration is strong. Particularly, in the case of dispersants used in oil-based paints and inks, various kinds of dispersants having various chemical structures and molecular weights are used in industrial fields. However, eco-friendly water-soluble dispersants are widely used in various fields such as resins and solvents contained in paints, The development is limited due to the fact that it should be acidic, and the products are not diversified.

As described above, the organic and inorganic pigments of the water-soluble paint and the ink are dispersed to provide dispersion stabilization, and sedimentation due to the separation of the pigment contained in the paint and the ink from the resin or the solvent is prevented, It is necessary to develop an eco-friendly water-soluble dispersant capable of improving physical properties such as stain and gloss.

In order to achieve the above object, the present invention provides a method for preventing sedimentation due to separation of a pigment contained in a paint and ink from a resin or a solvent and improving physical properties of color aggregation, color separation, Soluble hybrid water-soluble dispersant composition.

The present invention relates to a hybrid water-soluble dispersant composition comprising a water-soluble fatty acid-modified polyester resin, a water-soluble modified styrene maleic anhydride resin or a water-soluble modified styrene maleic anhydride ester resin in a weight ratio of 30:70 to 70:30 .

In the present invention, the water-soluble fatty-acid-modified polyester resin comprises 30 to 40% by weight of an oil or a fatty acid; 40 to 50% by weight of glycol; And 15 to 25% by weight of basic acids are condensed and polymerized to have an acid value of 30 to 100 and a weight average molecular weight of 2,000 to 8,000.

In the present invention, the oil is at least one member selected from the group consisting of a fat oil, a cottonseed oil, a dehydrated castor oil, a fish oil, a linseed oil, a safflower oil, a sunflower oil and a soybean oil, and the fatty acid is at least one selected from the group consisting of flaxseed fatty acid, Soybean oil fatty acid, tall oil fatty acid, dehydrated castor oil fatty acid, linoleic acid and ricinoleic acid.

In the present invention, the glycol is selected from the group consisting of ethylene glycol, propylene glycol, 1.4 butylene glycol, 1.5 pentane diol, 1.6 hexane diol, neopentyl glycol, diethylene glycol, methylpropane diol, cyclohexane dimethanol, ethylene oxide addition type polyol and propylene oxide And addition-type polyols.

In the present invention, the basic acids are selected from the group consisting of trimellitic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, isophthalic acid, terephthalic acid, adipic acid, Azelaic acid, azelaic acid, sebacic acid, cyclohexane diacid, fumaric acid, and maleic anhydride.

In the present invention, the water-soluble modified styrene maleic anhydride resin or the water-soluble modified styrene maleic anhydride ester resin is preferably a styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500, A resin obtained by esterifying styrene maleic anhydride resin of 5,000 to 7,500 with an alkali substance.

In the present invention, the styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 is at least one selected from the group consisting of SMA1000, SMA2000 and SMA3000, and the esterified styrene maleic anhydride resin At least one selected from the group consisting of SMA1440, SMA17352, SMA2625, SMA3840 and SMA31890.

In the present invention, the alkali substance is selected from the group consisting of potassium hydroxide, sodium hydroxide, diethylamine, triethylamine, diethanolamine, triethanolamine, aminomethylpropanol, dimethylethanolamine, aminoethylethanolamine, diisopropanolamine And ammonia.

A hybrid water-soluble dispersant in which a water-soluble modified styrene maleic anhydride resin or a styrene maleic anhydride ester resin is mixed with a water-soluble fatty acid-modified polyester resin is obtained by a method comprising the steps of separating a pigment contained in a paint and ink from a resin or a solvent To prevent sedimentation and to improve physical properties of color aggregation, color separation, color unevenness and gloss drop-down after dispersion.

Hereinafter, the present invention will be described in detail.

The present invention relates to an environmentally friendly hybrid water-soluble dispersant composition which prevents precipitation due to separation of a pigment and a resin or a solvent and improves physical properties such as color cohesion, color separation, color unevenness and gloss degradation after dispersion.

For the above-mentioned purpose, the environmentally-friendly hybrid water-soluble dispersant composition of the present invention primarily uses a water-soluble fatty acid-modified polyester resin as a base. Since the hydrophilic group is largely introduced to facilitate the water- Preventing settling due to separation, and making the gloss excellent after dispersing the pigment. Secondarily, water-soluble modified styrene maleic anhydride resin or water-soluble modified styrene maleic anhydride ester resin having excellent dispersibility, water resistance and mechanical and chemical properties is mixed with the above-mentioned water-soluble fatty acid-modified polyester resin, Of water-soluble dispersant composition.

The hybrid water-soluble dispersant composition is prepared by mixing a water-soluble fatty acid-modified polyester resin, a water-soluble modified styrene maleic anhydride resin or a water-soluble modified styrene maleic anhydride ester resin at a weight ratio of 30:70 to 70:30 .

When the weight ratio of these two resins is less than 30:70, the dispersing agent is significantly reduced in the water-solubility, resulting in a decrease in gloss after drying the paint. When the weight ratio of these two resins is more than 70:30, the dispersing agent is satisfactorily water-dispersed, but the dispersibility of the pigment is remarkably lowered and the mechanical properties and chemical resistance after the paint drying are remarkably lowered.

Wherein the water-soluble fatty acid-modified polyester resin comprises 30 to 40% by weight of an oil or a fatty acid; 40 to 50% by weight of glycol; And 15 to 25% by weight of basic acids, and the water-soluble fatty-acid-modified polyester resin thus produced preferably has an acid value of 30 to 100 and a weight-average molecular weight of 2,000 to 8,000. When the acid value of the water-soluble fatty-acid-modified polyester resin is less than 30, water-solubility is not achieved. When the acid value exceeds 100, water-solubility is satisfactory, but the water resistance and alkali resistance of the coating are significantly lowered. When the weight-average molecular weight is less than 2,000, the dispersibility and the chemical resistance of the coating are deteriorated. When the weight-average molecular weight exceeds 8,000, the water-solubility is difficult and the gloss of the coating is deteriorated.

In the case of an oil or a fatty acid used in the production of the primary water-soluble fatty acid-modified polyester resin, an oil or a fatty acid having a high iodine value and a good dispersibility is preferable, and the oil is preferably selected from the group consisting of oil, cottonseed oil, dehydrated castor oil, It is preferable that the fatty acid is at least one selected from the group consisting of human milk, safflower oil, sunflower oil and soybean oil, and the fatty acid is selected from the group consisting of flaxseed fatty acid, safflower oil fatty acid, sunflower fatty acid, soybean oil fatty acid, tall oil fatty acid, dehydrated castor oil fatty acid, And the like.

The glycol to be used in the production of the primary water-soluble fatty acid-modified polyester resin may be at least one selected from the group consisting of ethylene glycol, propylene glycol, 1.4butylene glycol, 1.5pentanediol, 1.6hexanediol, neopentyl glycol, diethylene glycol, Cyclohexanedimethanol, cyclohexanedimethanol, ethylene oxide addition type polyol and propylene oxide addition type polyol.

The basic acids used in the preparation of the primary water-soluble fatty acid-modified polyester resin include trimellitic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, isophthalic It is preferably selected from the group consisting of acid, terephthalic acid, adipic acid, azelaic acid, sebacic acid, cyclohexanediacid, fumaric acid and maleic anhydride.

In the present invention, the water-soluble modified styrene maleic anhydride resin (SMA resin, manufactured by Cray Valley) or the water-soluble modified styrene maleic anhydride ester resin which is a secondary resin which is hybridized with the water-soluble fatty acid- A styrene maleic anhydride resin having an average molecular weight of 5,000 to 7,500 or a styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 may be neutralized with an alkali substance.

The alkaline substance used for this neutralization is preferably selected from the group consisting of potassium hydroxide, sodium hydroxide, diethylamine, triethylamine, diethanolamine, triethanolamine, aminomethylpropanol, dimethylethanolamine, aminoethylethanolamine, diisopropanolamine And ammonia are preferably used.

In the present invention, the styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 is at least one selected from the group consisting of SMA1000, SMA2000 and SMA3000 depending on the molecular weight, and the esterified styrene maleic anhydride The rye resin is at least one selected from the group consisting of SMA1440, SMA17352, SMA2625, SMA3840 and SMA31890 depending on the molecular weight, and these resins are preferably those manufactured by Cray Valley.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

A method for producing a water-soluble fatty acid-modified polyester resin constituting an environmentally-friendly hybrid water-soluble dispersant composition is shown in Examples 1 and 2. [

< Example  1>

A thermometer, a condenser, a stirrer, a condenser for removing water, and a heating device were attached to a 2 liter four-necked flask. 400 g of polyethylene glycol PEG-400 (molecular weight: 400), 49 g of ethylene glycol, 350 g of dehydrated castor oil fatty acid, and 160 g of fumaric acid were mixed and heated to 180 DEG C with gentle stirring to obtain an acid value of 50 And 60 g of trimellitic anhydride was mixed and reacted at 140 캜 to obtain a fatty acid modified polyester having an acid value of 80 and a weight average molecular weight of 4,000. 90 g of aminomethyl propanol was added thereto, neutralized and water was mixed to obtain a water-soluble fatty acid-modified polyester resin having a nonvolatile content of 45%.

< Example  2>

A thermometer, a condenser, a stirrer, a condenser for removing water, and a heating device were attached to a 2 liter four-necked flask. 400 g of polyethylene glycol PEG-400 (molecular weight: 400), neopentyl glycol (83 g), tall oil fatty acid (400 g) and maleic anhydride (145 g) were mixed and gradually heated to 180 DEG C while condensation reaction to obtain an acid value 60, and 70 g of tetrahydrophthalic anhydride was mixed and reacted at 140 占 폚 to obtain a fatty acid-modified polyester having an acid value of 80 and a weight average molecular weight of 4,800. To this, 90 g of dimethylethanolamine was added and neutralized, and water was mixed to obtain a water-soluble fatty acid-modified polyester resin having a nonvolatile content of 45%.

Next, methods for producing a water-soluble modified styrene maleic anhydride resin or a water-soluble modified styrene maleic anhydride ester resin constituting an environmentally-friendly hybrid water-soluble dispersant are shown in Examples 3 to 6.

< Example  3>

250 g of styrene maleic anhydride resin SMA1000 (manufactured by Cray Valley, molecular weight: 5,000, acid value: 465 to 495) was added to a 2-liter four-necked flask equipped with a thermometer, a stirrer and a condenser, And the mixture was stirred at 50 ° C for 1 hour to obtain a water-soluble resin modified with styrene maleic anhydride resin having a nonvolatile content of 45%.

< Example  4>

300 g of styrene maleic anhydride ester resin SMA1440 (manufactured by Cray Valley, molecular weight: 7,000, acid value: 165 to 205) in a 2-liter four-necked flask equipped with a thermometer, a stirrer and a condenser was charged with 90 g of dimethylethanolamine and 477 g The resulting mixture was stirred at 50 占 폚 for 1 hour while titrating to obtain a water-soluble resin modified with styrene maleic anhydride ester resin having a nonvolatile content of 45%.

< Example  5>

375 g of styrene maleic anhydride resin SMA2000 (manufactured by Cray Valley, molecular weight: 7,500, acid value: 335 to 375) was added to a 2-liter four-necked flask equipped with a thermometer, a stirrer and a condenser, and 80 g of sodium hydroxide and 556 g The resulting mixture was stirred at 50 占 폚 for 1 hour while titration to obtain a water-soluble resin modified with styrene maleic anhydride resin having a nonvolatile content of 45%.

< Example  6>

400 g of styrene maleic anhydride ester resin SMA2625 (manufactured by Cray Valley, molecular weight: 9,000, acid value: 200-240) was mixed with 95 g of aminomethyl propanol and 495 g of water with a thermometer, a stirrer and a condenser in a 2 L four- The resulting mixture was stirred at 50 占 폚 for 1 hour while titrating to obtain a water-soluble resin modified with styrene maleic anhydride ester resin having a nonvolatile content of 45%.

< Example  7 to Example  30>

Using Examples 1 to 6, in Examples 7 to 30 in which the water-soluble fatty acid-modified polyester resin and the water-soluble modified styrene maleic anhydride resin or styrene maleic anhydride ester resin were mixed The hybrid water-soluble dispersant was prepared and the mixing ratios thereof are shown in Table 1.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Sum Example 7 50 - 50 - - - 100 Example 8 50 - - 50 - - 100 Example 9 50 - - - 50 - 100 Example 10 50 - - - - 50 100 Example 11 - 50 50 - - - 100 Example 12 - 50 - 50 - - 100 Example 13 - 50 - - 50 - 100 Example 14 - 50 - - - 50 100 Example 15 30 - 70 - - - 100 Example 16 30 - - 70 - - 100 Example 17 30 - - - 70 - 100 Example 18 30 - - - - 70 100 Example 19 - 30 70 - - - 100 Example 20 - 30 - 70 - - 100 Example 21 - 30 - - 70 - 100 Example 22 - 30 - - - 70 100 Example 23 70 - 30 - - - 100 Example 24 70 - - 30 - - 100 Example 25 70 - - - 30 - 100 Example 26 70 - - - - 30 100 Example 27 - 70 30 - - - 100 Example 28 - 70 - 30 - - 100 Example 29 - 70 - - 30 - 100 Example 30 - 70 - - 30 100

Next, the water-soluble paints of Production Examples 1 to 26 were prepared using the hybrid water-soluble resins of Examples 7 to 30, and these are shown in Table 2.

< Manufacturing example  1>

(CYANINE BLUE, manufactured by DAINICHI SEIKA, Japan), a water-soluble polyester resin (PED-300 having a nonvolatile content of 30% and a viscosity of 1150 cps, manufactured by FTC KOREA) , A melamine curing agent (CYMEL-325, manufactured by Cytec), a curing catalyst (ACat-0060, manufactured by FTC KOREA), a defoaming agent and a diluent (water) To prepare a water-soluble paint.

< Manufacturing example  2>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 8 was used as a dispersant instead of Example 7. [

< Manufacturing example  3>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 9 was used as a dispersant instead of Example 7.

< Manufacturing example  4>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 10 was used as a dispersant.

< Manufacturing example  5>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 11 was used as a dispersant.

< Manufacturing example  6>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 12 was used as a dispersant instead of Example 7. [

< Manufacturing example  7>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 13 was used as a dispersant.

< Manufacturing example  8>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 14 was used as a dispersant instead of Example 7.

< Manufacturing example  9>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 15 was used as a dispersant instead of Example 7.

< Manufacturing example  10>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 16 was used as a dispersant instead of Example 7.

< Manufacturing example  11>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 17 was used as a dispersant.

< Manufacturing example  12>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 18 was used as a dispersant instead of Example 7.

< Manufacturing example  13>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 19 was used as a dispersant instead of Example 7.

< Manufacturing example  14>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 20 was used as a dispersant.

< Manufacturing example  15>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 21 was used as a dispersant instead of Example 7.

< Manufacturing example  16>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 22 was used as a dispersant instead of the water-soluble paint of Example 7.

< Manufacturing example  17>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 23 was used as a dispersant instead of Example 7.

< Manufacturing example  18>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 24 was used as a dispersant instead of Example 7.

< Manufacturing example  19>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 25 was used as a dispersant instead of Example 7.

< Manufacturing example  20>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 26 was used as a dispersant.

< Manufacturing example  21>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 27 was used as a dispersant instead of Example 7.

< Manufacturing example  22>

Example 7 A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 28 was used as a dispersant.

< Manufacturing example  23>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 29 was used as a dispersant instead of Example 7.

< Manufacturing example  24>

A water-soluble paint was prepared in the same manner as in Preparation Example 1, except that the hybrid water-soluble resin prepared in Example 30 was used as a dispersant instead of the water-soluble paint of Example 7.

< Manufacturing example  25>

Example 7 The procedure of Preparation Example 1 was repeated except that DISPERBYK-190 (manufacturer: BYK), which is a polymer block copolymer having an acid value of 10 and a nonvolatile fraction of 40%, which is generally used in the industry, was used as a dispersant A water-soluble paint was prepared.

< Manufacturing example  26>

The same procedure as in Production Example 1 was carried out except that AFCONA-4550 (manufacturer: AFCONA), which is a modified polyacrylate polymer having an amine value of 35 to 45 and a nonvolatile content of 50% To prepare a water-soluble paint.

Raw material name Compounding amount Production Examples 1 -
Production Example 24 Production example 25 Production Example 26 Water-soluble polyester resin 30 30 30 Pigment (CYANINE BLUE) 5 5 5 Titanium oxide (TiO2) 25 25 25 Dispersant Examples 7 to 30 1.5 - - DISPERBYK-190 - 1.5 AFCONA-4550 - - 1.5 Melamine hardener 6 6 6 Curing catalyst 0.8 0.8 Defoamer 0.2 0.2 0.2 water 31.5 31.5 31.5 Sum 100 100 100

< Test Example >

In order to examine the properties of the dispersants of Examples 7 to 24 used for preparing water-soluble paints, the dispersibility of the water-soluble paints prepared in Table 2, the changes after dispersion and the state after coating were compared and the results are shown in Table Respectively.

Each characteristic shown in Table 3 was evaluated by the following method.

1. Gloss, dispersibility, Acid resistance , Alkali resistance

The gloss is expressed as the intensity of the reflected light with respect to the intensity of the light incident at an angle of 60 ° and measured according to ASTM-D-523 standard. The dispersibility is measured by DYNO-MILL to determine the time, In the case of alkali resistance, it was measured according to ASTM-D-1308 standard.

2. Abdominal aquatic , Coating film appearance

After immersing in boiling water for 24 hours, the degree of change of the coating film was visually determined. The appearance of the coating film was visually observed with a naked eye and a magnifying glass of 50 magnification, and the occurrence of pinholes, cretering, and dullness was evaluated.

3. Color cohesion and color separation

Color cohesion was determined by the degree of spreading or cohesion of BLUE color through a 200X optical microscope. The color separation was performed by hand rubbing a part of the coated surface before drying by heating after drying, Were compared and observed.

4. Paint storage

The paintability was evaluated by observing the initial viscosity after the paint was prepared, and then observing the condition at 60 ° C every day and comparing it to the standard state without any dispersant.

division Polish
(60.) Dispersibility Acid resistance Alkali resistance Abdominal aquatic Coat appearance Color cohesion Color separation Paint Resistance Production Example 1 88 ○ Good Good Good ◎ ○ ○ Good Production Example 2 88 ○ Good Good Good ◎ ◎ ○ Good Production Example 3 92 ◎ Good Good Good ◎ ◎ ◎ Good Production Example 4 91 ◎ Good Good Good ◎ ◎ ◎ Good Production Example 5 86 ○ Good Good Good ○ ○ ○ Good Production Example 6 87 ○ Good Good Good △ ○ ○ Good Production Example 7 90 ○ Good Good Good  ○ ○ ○ Thickening Production Example 8 91 ◎ Good Good Good ◎ ○ ○ Thickening Production Example 9 85 △ Good Good Good ○ △ ○ sedimentation Production Example 10 87 ○ Good Good Good ○ ○ ◎ sedimentation Production Example 11 88 ○ Good Good Good ○ ◎ ○  sedimentation Production Example 12 90 ○ Good Good Good ◎ ○ ◎ sedimentation Production Example 13 88 ○ Good Good Good ◎ ◎ ○ Good Production Example 14 87 ○ Good Good Good ○ ○ ○ Good Production Example 15 87 ○ Good Good Good △ ○ ○ Good Production Example 16 89 ○ Good Good Good ○ ○ ◎ Good Production Example 17 93 ◎ Good Good Good ○ ◎ ◎ Good Production Example 18 92 ◎ Good Good Good ◎ ◎ ◎ Good Production Example 19 92 ◎ Good Good Good ◎ ○ ◎ Good Production example 20 92 ◎ Good usually Good ◎ ◎ ◎  Good Production Example 21 91 ◎ Good Good usually ◎ ○ ◎ Good Production Example 22 93 ◎ Good usually usually ◎ ◎ ◎ Good Production Example 23 92 ◎ Good usually Good ◎ ◎ ◎ Good Production Example 24 92 ◎ Good Good Good △ ○ ○ Good Production example 25 90 ◎ Good usually Good ○ ○ ○ Good Production Example 26 90 ○ Good usually usually ○ ○ X Good

In Table 3, evaluation items indicating the characteristics of each coating material are ⊚ very good, good good, △ fair and X poor in terms of dispersibility, film appearance, color cohesion and color separation.

As shown in Table 3, the water-soluble paint using the hybrid water-soluble dispersant of the present invention is superior to the water-soluble paints of Production Examples 25 and 26, which are generally used in industry, in terms of gloss, dispersibility, acid resistance, , Coating film appearance, color cohesion, color separation, paint retention, and the like.

Claims (9)

A hybrid water-soluble dispersant composition in which a water-soluble fatty acid-modified polyester resin, a water-soluble modified styrene maleic anhydride resin or a water-soluble modified styrene maleic anhydride ester resin are mixed in a weight ratio of 30:70 to 70:30,
Wherein the water-soluble fatty acid-modified polyester resin comprises 30 to 40% by weight of an oil or a fatty acid; 40 to 50% by weight of glycol; And 15 to 25% by weight of basic acids are condensed and polymerized to have an acid value of 30 to 100 and a weight average molecular weight of 2,000 to 8,000.
delete The method according to claim 1,
Wherein the oil is at least one selected from the group consisting of oil, cottonseed oil, dehydrated castor oil, fish oil, linseed oil, safflower oil, sunflower oil and soybean oil.
The method according to claim 1,
Wherein the fatty acid is at least one selected from the group consisting of linseed oil fatty acid, safflower oil fatty acid, sunflower oil fatty acid, soybean oil fatty acid, tall oil fatty acid, dehydrated castor oil fatty acid, linoleic acid and ricinoleic acid.
The method according to claim 1,
Wherein the glycol is selected from the group consisting of ethylene glycol, propylene glycol, 1.4 butylene glycol, 1.5 pentanediol, 1.6 hexanediol, neopentyl glycol, diethylene glycol, methylpropanediol, cyclohexanedimethanol, ethylene oxide addition polyol and propylene oxide addition polyol Wherein at least one selected from the group consisting of water-soluble organic solvents and water-soluble organic solvents.
The method according to claim 1,
The basic acids may be selected from the group consisting of trimellitic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, isophthalic acid, terephthalic acid, adipic acid, azelaic acid, Wherein the water-soluble organic solvent is at least one selected from the group consisting of sebacic acid, cyclohexanediacid, fumaric acid, and maleic anhydride.
The method according to claim 1,
The water-soluble modified styrene maleic anhydride resin or water-soluble modified styrene maleic anhydride ester resin is preferably a styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 or a styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 Characterized in that a resin obtained by esterifying a styrene maleic anhydride resin is neutralized with an alkali substance.
8. The method of claim 7,
Wherein the styrene maleic anhydride resin having a weight average molecular weight of 5,000 to 7,500 is at least one selected from the group consisting of SMA1000, SMA2000 and SMA3000, and the esterified styrene maleic anhydride resin is at least one selected from the group consisting of SMA1440, SMA17352, SMA2625, SMA3840 and SMA31890. &Lt; RTI ID = 0.0 &gt; 21. &lt; / RTI &gt;
8. The method of claim 7,
The alkaline substance may be selected from the group consisting of potassium hydroxide, sodium hydroxide, diethylamine, triethylamine, diethanolamine, triethanolamine, aminomethylpropanol, dimethylethanolamine, aminoethylethanolamine, diisopropanolamine and ammonia Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt;