JPH101637A - Coating agent composition for plastic working - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition having excellent plastic workability, dryability in coating and chalking property of the coating film by adding a stearic acid metal salt and respectively specific styrene-acrylic resin and acrylic resin at specific ratios. SOLUTION: This composition having excellent zinc phosphate film treating property can be produced by compounding (A) 15-35 pts.wt. of a metal stearate, (B) 20-60 pts.wt. of a styrene-acrylic resin having an average unit formula of CH2 C(R<1> ) (COOR<2> )CH(C6 H5 )-CH2 (R<1> is H or methyl; R<2> is H or a 1-10C alkyl) and a total acid value of 1.0-1.20mgKOH/g and (C) 10-40 pts.wt. of an acryic resin having an average unit formula of CH2 C(R<3> )(COOR<4> ) (R<3> is H or methyl; R<4> is H or a 1-10C alkyl) and a total acid value of 10-300mgKOH/g. The sum of A+B is 47-84.9 pts.wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a coating film, such as a drying property during coating, a film forming property and a wettability, and a zinc phosphate film treating property, without impairing plastic workability such as press formability. The present invention relates to a plastic working coating agent composition having excellent heat resistance.

[0002]

2. Description of the Related Art In a press forming process of an automobile body panel, lubricating oil is generally used for a steel sheet material in order to facilitate forming. Generally, the lubricating oil is prevented in consideration of the degreasing efficiency in a subsequent process. Low-viscosity oil called rust oil is widely used. However, the formability of aluminum alloy sheets for automobile body panels is very poor as compared with conventional cold-rolled steel sheets, and press cracking may occur depending on the product shape even when the above-described lubricating oil is used. In order to prevent press cracking, it is effective to reduce friction between the material and the mold during press forming. As countermeasures against these, high-viscosity oil called press oil, coating agent and polyvinyl chloride (PV
The film of C) may be used.

[0003]

However, the use of a high-viscosity press oil or a coating agent has a disadvantage that the degreasing property in the subsequent degreasing step is reduced. Further, in the case of a polyvinyl chloride (PVC) film, it is necessary to perform a peeling operation before the post-process described above, and neither is an effective means for mass production. Further, when a coating agent is used, the coating property of the coating agent on an aluminum alloy plate is one of the performances that must be considered practically. That is, the wettability and drying property at the time of application and the choking property after application are one of the performances required for mass production. Therefore, the present inventors have proposed a novel plastic working coating agent which is excellent in drying property at the time of application and choking property after application without impairing the plastic workability (Japanese Patent Application Laid-Open No. 8-48937). In addition, in mass production, a coating agent may be used on a coiled aluminum alloy plate, and this method is more sticky than applying the coating agent to an aluminum plate cut to an arbitrary size. (Poor film formability), and the workability when the aluminum alloy plate is used for work may be reduced. In other words, when applying a coating agent to a coiled aluminum alloy plate, it is usually applied on a coating line,
There is a restriction on the drying time, and usually hot air is applied for several tens of seconds to several minutes and then immediately re-wound into a coil shape after drying, so it is necessary to dry in a short time and maintain the film hardness. . For this reason, the present invention is excellent in wettability and drying property at the time of application without impairing plastic workability such as press forming improvement performance such as press forming of an aluminum alloy plate used for an automobile body panel, An object of the present invention is to provide a plastic working coating agent composition having excellent coating properties such as drying properties during application and chalking properties after application and film forming properties without impairing workability and degreasing properties. In addition, when a coating agent is used, the ability to treat a zinc phosphate film on an aluminum alloy plate is one of the performances that must be considered practically. For this reason, the present invention provides a plastic working excellent in zinc phosphate coating processability without impairing plastic workability, applicability and film formability, including press forming improvement performance of an aluminum alloy plate used for an automobile body panel. It is also an object to provide a coating composition.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted research on an optimal coating agent for improving press formability in press forming of an aluminum alloy plate or the like. A mixture of stearic acid metal salt and two specific acrylic resins in a specific amount, without impairing plastic workability, especially press formability,
In order to complete the present invention based on these findings, it was found that drying properties during coating, plastic workability, degreasing properties, coating properties, film forming properties, zinc phosphate coating property and wettability were excellent. Reached.

That is, the present invention relates to (A) 15 to 35 parts by mass of a metal stearate, (B) an average unit formula represented by the following formula (1), and a total acid value of 10 to 120 mgKOH / g.
20 to 60 parts by mass of styrene acrylic resin,
(C) The average unit formula is represented by the following formula (2), and the total acid value is 1
Acrylic resin of 0 to 300 mg KOH / g
40 parts by mass, and the total amount of the styrene acrylic resin (B) and the acrylic resin (C) is 4
The present invention provides a plastic working coating agent composition having a ratio of 7 to 84.9 parts by mass.

[0006]

Embedded image

[0007] -CH_TwoC (R¹ ) (COOR^Two) -CH (C₆H_Five) -CH_Two-(1) (where R¹ Is a hydrogen atom or a methyl group, R^TwoIs a hydrogen atom or
Is a linear or branched alkyl group having 1 to 10 carbon atoms
Represent. )

[0008]

[Image Omitted] -CH_TwoC (R^Three ) (COOR^Four)-(2)

(Where R^Three Is a hydrogen atom or a methyl group, R^Four
Has a hydrogen atom or a straight or branched chain having 1 to 10 carbon atoms
Represents an alkyl group. Hereinafter, the present invention will be described in detail.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION As the metal salt of stearic acid as the component (A), various metal salts of stearic acid can be used. Calcium salt, aluminum salt, sodium salt, potassium salt, lithium salt, zinc salt of stearic acid can be used. Salts and the like are preferable, and a calcium salt of stearic acid is more preferable. The metal stearate may be used alone or in combination of two or more. The compounding ratio of the metal stearate is 15 to 35 parts by mass, preferably 17 to 32 parts by mass, particularly preferably 15 to 30 parts by mass. If the mixing ratio of the metal stearic acid salt is less than 15 parts by mass, the moldability will be poor, and if it exceeds 35 parts by mass, the choking property will be deteriorated.

The styrene acrylic resin as the component (B) has an average unit formula represented by the following formula (1) and a total acid value of 10 to 12:
0 mgKOH / g.

[0012]

Embedded image_TwoC (R¹ ) (COOR^Two) -CH (C₆H_Five) -CH_Two-(1)

(Wherein R¹ Is a hydrogen atom or a methyl group, R^Two
Has a hydrogen atom or a straight or branched chain having 1 to 10 carbon atoms
Represents an alkyl group. ) R^TwoIs preferably a hydrogen atom or a linear or straight-chain having 1 to 9 carbon atoms.
Is a branched alkyl group, particularly preferably hydrogen
Straight or branched alkyl having 1 to 8 carbon atoms or atoms
Group. Styrene acrylic tree consisting of this average unit formula
Fat is represented by R in the average unit formula.¹ And R^TwoMay be the same
And may be different. In addition, the styre of component (B)
The acrylic resin is represented by the average unit formula of the above formula (1).
But -CH_TwoC (R¹ ) (COOR^Two)-And -CH (C₆
H_Five) -CH_Two-A random copolymer may be used. (B)
Styrene acrylic resin has a total acid value of
10 to 120 mgKOH / g, preferably 10 to 120 mgKOH / g.
80 mgKOH / g, particularly preferably 10 to 50
mg KOH / g. Molecular weight of styrene acrylic resin
Is not particularly limited, but usually has a weight average molecular weight of 100,0.
The range of 00 to 1,000,000 is preferred. styrene
The acrylic resin may be used alone, or two or more kinds may be used.
May be used in combination. Styrene acrylic resin
Copolymerizes styrene and acrylic acid or its derivatives
It is a resin obtained by this. Raw material styrene and
Styrene is preferred for the ratio of the lylic acid or derivative thereof.
5 to 35% by mass, particularly preferably 10 to 20% by mass
You. Polymerization methods for copolymerization include suspension polymerization, emulsion polymerization, and solution polymerization.
Various polymerization methods such as liquid polymerization and bulk polymerization are exemplified.
The average unit formula of the acrylic resin of the component (C) is as follows:
Represented by (2) and having a total acid value of 10 to 300 mgKOH / g
It is.

[0014]

Embedded image_TwoC (R^Three ) (COOR^Four)-(2)

(Where R^Three Is a hydrogen atom or a methyl group, R^Four
Has a hydrogen atom or a straight or branched chain having 1 to 10 carbon atoms
Represents an alkyl group. ) R^FourIs preferably a hydrogen atom or a linear or straight-chain having 1 to 9 carbon atoms.
Is a branched alkyl group, particularly preferably hydrogen
Straight or branched alkyl having 1 to 8 carbon atoms or atoms
Group. Acrylic resin consisting of this average unit formula is
R in the average unit formula^Three And R^FourMay be the same or different
It may be. (C) Component acrylic resin is degreased
The total acid value is from 10 to 300 mgKOH / g
And preferably 30 to 200 mgKOH / g.
Preferably, it is 50 to 150 mgKOH / g. Aku
The molecular weight of the ril resin is not particularly limited, but is usually a weight average molecular weight.
The range of the amount of children is preferably 10,000-200,000
No. The acrylic resin of the component (C) may be used alone.
Or two or more of them may be used in combination. Acri
Resin is used to polymerize acrylic acid or its derivatives.
It is a resin obtained from The polymerization method for performing the polymerization is suspension
Various polymerization methods such as polymerization, emulsion polymerization, solution polymerization, bulk polymerization
Law.

The blending ratio of the styrene acrylic resin as the component (B) is from 20 to 60 parts by mass, preferably from 25 to 57 parts by mass, particularly preferably from 30 to 70 parts by mass from the viewpoint of drying properties.
55 parts by mass. The mixing ratio of the acrylic resin as the component (C) is 10 to 40 parts by mass, preferably 15 to 38 parts by mass, particularly preferably 20 to 3 parts by mass from the viewpoint of degreasing.
5 parts by mass. The total amount of the styrene acrylic resin of the component (B) and the acrylic resin of the component (C) is 47 to
It is 84.9 parts by mass, preferably 60 to 80 parts by mass, particularly preferably 63 to 75 parts by mass. (B)
If the total amount of the styrene acrylic resin as the component and the acrylic resin as the component (C) is less than 47 parts by mass, the choking performance is reduced, and if it is more than 84.9 parts by mass, the moldability is deteriorated. The total amount of each of the components (A), (B) and (C) is preferably 86 to 99.9 parts by mass.

In the plastic working coating composition of the present invention, it is preferable to blend the polyoxyethylene ether represented by the formula (3) of the component (D).

[0018]

Embedded image R—O— (CH ₂ CH ₂ O) _n —H (3)

(In the formula, R represents an alkyl group, an alkenyl group, an alkylphenyl group or a lanolin residue, and n represents an integer of 5 or more.) R in the formula (1) has 12 or more carbon atoms. Are preferable, and particularly those having 14 to 18 carbon atoms are preferable. Also, n is 20
And preferably an integer of from 80 to 80, more preferably from 20 to 70.
And particularly preferably an integer of 40 to 60. In addition, these polyoxyethylene ethers preferably have an HLB value of 8 or more, particularly preferably 12 or more. The lanolin residue of R in the formula (1) refers to lanolin alcohol obtained by removing a hydroxyl group.

Specific examples of these polyoxyethylene ethers include, for example, polyoxyethylene octyl ether, polyoxyethylene nonyl ether, polyoxyethylene decyl ether, polyoxyethylene undecyl ether, polyoxyethylene lauryl ether, polyoxyethylene Tridecyl ether, polyoxyethylene myristyl ether, polyoxyethylene pentadecyl ether, polyoxyethylene cetyl ether, polyoxyethylene heptadecyl ether, polyoxyethylene stearyl ether, polyoxyethylene nonadecyl ether, polyoxyethylene octenyl ether, Polyoxyethylene nonenyl ether, polyoxyethylene decenyl ether, polyoxyethylene undecenyl ether, Oxyethylene dodecenyl ether, polyoxyethylene tridecenyl ether, polyoxyethylene tetradecenyl ether, polyoxyethylene pentadecenyl ether, polyoxyethylene hexadecenyl ether, polyoxyethylene heptadecenyl ether, polyoxyethylene oleyl Ether, polyoxyethylene nonadecenyl ether, polyoxyethylene eicosenyl ether, polyoxyethylene pentyl phenyl ether, polyoxyethylene hexyl phenyl ether, polyoxyethylene heptyl phenyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene capryl phenyl Ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene decyl phenyl ether, Oxyethylene undecyl phenyl ether, polyoxyethylene lauryl phenyl ether, polyoxyethylene tridodecyl phenyl ether, polyoxyethylene myristyl phenyl ether, polyoxyethylene pentadecyl phenyl ether, polyoxyethylene lanolin alcohol, and their structural isomers Preferred are polyoxyethylene nonylphenyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene lanolin alcohol and the like. The polyoxyethylene ether may be used alone or in combination of two or more. When blending the polyoxyethylene ether of the component (D), the blending ratio of the polyoxyethylene ether of the component (D) is 0.1 to 14 parts by mass, and preferably 0.1 to 14 parts by mass.
It is 3 to 10 parts by mass, particularly preferably 0.5 to 5 parts by mass. If the compounding ratio of the polyoxyethylene ether is less than 0.1 parts by mass, the wettability at the time of application is reduced,
When the amount is more than 14 parts by mass, the drying property at the time of application is deteriorated. In addition, when mix | blending the polyoxyethylene ether of (D) component, the total amount of each component of (A), (B), (C), and (D) is a ratio which makes 100 mass parts.

In the plastic working coating agent composition of the present invention, it is preferable to incorporate colloidal fine particles. When the colloidal fine particles are blended, the zinc phosphate coating treatment property can be further improved. As the colloidal fine particles, various colloidal fine particles are used, and inorganic colloidal fine particles are preferable, and in particular, boron nitride fine particles, calcium carbonate fine particles, titanium oxide fine particles, aluminum oxide fine particles and the like are preferable. In addition, the colloid fine particles may be used alone or in combination of two or more. The average diameter of the colloid particles is 0.001 to 1 μm
Is particularly preferable, and 0.001 to 0.5 μm is particularly preferable.
The mixing ratio of the colloidal fine particles is usually from 0.01 to 20% by mass, preferably from 0.1 to 10% by mass, based on the total solid content of the plastic working coating agent composition. % By mass, and particularly preferably 0.5% by mass.
~ 5% by mass. If the compounding ratio is less than 0.01% by mass, the effect of improving the zinc phosphate treatment property is poor, and if it exceeds 20% by mass, the processability tends to decrease.

In the plastic working coating composition of the present invention, the above-mentioned base component is usually used together with water. Metal salt of stearic acid, styrene acrylic resin and acrylic resin, or the mixing ratio of the base component and water of those obtained by adding polyoxyethylene ether to them, usually the base component is 1 to
60% by mass, 40 to 99% by mass of water, preferably 5 to 40% by mass of the base component, and 60 to 9% by mass of water.
5% by mass. If the amount of the base material component is less than 1% by mass, the effect of addition is poor, and if it exceeds 60% by mass, the coating operability decreases.

[0023] The plastic working coating composition of the present invention may contain, if necessary, other components, such as a rust preventive, an antifoaming agent, an extreme pressure agent, an antioxidant, and an oxidized wax, in addition to the above-mentioned base component. An appropriate amount of auxiliary components such as can be added. As the rust preventive, various rust preventives can be used, and examples thereof include boric acid amide, polyoxyethylene alkylamine, and morpholine. These rust preventives may be used alone or in combination of two or more. As the antifoaming agent used in the present invention, an aqueous antifoaming agent can be used, and examples thereof include modified silicone. These defoamers include 1
Species may be used alone or in combination of two or more.

The amount of the auxiliary component such as the rust preventive and the defoaming agent may be appropriately selected. The amount of the rust preventive is usually 1% by mass or less of the total amount of the plastic working coating agent composition. is there. Examples of the oxidized wax used in the present invention include oxidized polyethylene wax and oxidized paraffin wax. These oxidized waxes may be used alone or in combination of two or more.

The plastic working coating composition of the present invention can be produced by appropriately mixing and mixing predetermined amounts of the above components. Mixing method and addition method of various components,
There is no particular limitation, and it can be performed by various methods, and the mixing order and the addition order can be performed in various mixing orders and addition orders.

The plastic working coating agent composition of the present invention can be used for various plastic workings such as press forming, drawing forming, and drawing forming. It is effective for forming and functions extremely effectively for aluminum alloy plates. The plastic working coating agent composition of the present invention is extremely effective especially when the plastic working material is subjected to a zinc phosphate coating process, which is a process after the aluminum material coated with the plastic working coating composition is pressed. The plastic working coating agent composition of the present invention is used by applying it to a plastic working material during plastic working. The amount of application is not particularly limited,
Usually, the dry weight is in the range of 0.1 to 10 g / m ² , preferably 0.5 to 3 g / m ² . The coating can be performed by various coating methods such as brush coating, roll coating, spray coating, electrostatic coating, and dip coating.

[0027]

Next, the present invention will be described more specifically with reference to examples and comparative examples. The present invention is not limited by these examples. The evaluation tests of the examples and comparative examples were performed by the following methods.

(1) Test material and coating method Aluminum alloy plate for automobile body panel (5.0% M
g-Al annealed material, plate thickness 1.0 mm), as a pretreatment, immersed in an HNO ₃ aqueous solution (30%) at 60 ° C. for 10 seconds, washed with water, dried, and then coated with a bar coater No. 3. The coating agent was applied to both sides of the plate. After the coating, the coating was dried in an atmosphere at 80 ° C. for 60 seconds to obtain a coating amount after drying of 1 g / m ² .

(2) Erichsen test An Erichsen value was determined by the method of JIS Z22447 B method by cutting an aluminum alloy plate for an automobile body panel coated with a coating agent into 90 mm x 90 mm and using it as a test piece. In this test, the wrinkle holding force was 10 kN,
The test was performed under the condition of a punch speed of 6 mm / min. The Erichsen value was an average value of three measurements. The evaluation was performed according to the following criteria. ：: 9.5 mm or more Δ: 8.5 mm or more and less than 9.0 mm ×: less than 8.5 mm

(3) Deep drawing test An aluminum alloy plate for an automobile body panel coated with a coating agent was cut into a disc having a diameter of 84 mm and used as a test piece, and was subjected to cylindrical deep drawing under the following forming conditions to adjust the forming height. The required deep drawability was evaluated. The forming height was a moving distance of the punch until breakage occurred in the test piece in cylindrical deep drawing, and was an average value of three times. Test conditions: Die: φ42.5 mm, shoulder R8 mm Punch: φ40 mm, shoulder R8 mm Processing speed: 60 mm / min Wrinkle holding force: 2.6 kN Evaluation was made based on the following criteria. ：: 18.0 mm or more Δ: 15.0 mm or more and less than 18.0 mm ×: less than 15.0 mm

(4) Degreasing test An aluminum alloy plate for an automobile body panel coated with a coating agent is cut into 1 mm x 75 mm x 150 mm to form a test piece, which is heated to 43 ° C with an alkaline degreasing solution (Nippon Parker Rising Co., Ltd.) The mist was washed for 60 seconds by FC-L4428 (manufactured by FC-L4428), the surface of the test piece after immersion in water was visually observed, and the remaining coating agent and the degree of water leakage were evaluated in the following three steps. 3: The state where the coating agent was removed, the water leakage was complete, and the degreasing was good. 2: The state where the coating agent was removed but the water repelling was slightly 1: The remaining of the coating agent was recognized. Water repelling is recognized,
Degreasing is in poor condition

(5) Zinc phosphate coating treatment test A zinc phosphate treatment liquid (PB-3020 manufactured by Nippon Parker) heated to 43 ° C was used as a test piece with the aluminum alloy plate for an automobile body panel after the above degreasing test. Soak for 120 seconds,
After washing with water for 1 minute, the dry weight of the test piece treated with the zinc phosphate film was measured, and the test piece was treated with a 5% aqueous solution of chromic anhydride (7%).
5 ° C.) for 15 minutes to remove the zinc phosphate film on the aluminum surface, wash with water for 1 minute, and determine the weight of the dried test piece.
The adhesion weight of the zinc phosphate film was measured. The amount of the zinc phosphate coating agent adhered to the aluminum material surface was calculated by the following equation (1).

[0033]

(Equation 1)

The evaluation was made based on the amount of zinc phosphate coating applied after the degreasing test on the test piece to which the coating agent was not applied, and the amount of zinc phosphate coating applied to the test piece after the degreasing test with the coating agent applied. The percentage was defined as the percentage of the value obtained by dividing the value by the standard amount of adhesion, and the evaluation was performed according to the following criteria. ：: Adhesion rate of 80% or more △: Adhesion rate of 60% or more and less than 80% ×: Adhesion rate of less than 60%

(6) Coating Properties Test (Dryability) A coating agent was applied by the above-mentioned coating method, and the degree of drying of the coating film of the coating agent after drying was evaluated according to the following three criteria. Was determined. 3: The surface is dry, has no stickiness, and has good drying properties. 2: The surface is dry, but stickiness is seen in a part. 1: The surface is undried, sticky as a whole, and poor drying property.

(7) Coating Properties Test (Chalking Property) The coating composition was coated and dried by the coating method described above, and the coating composition of the coating composition after drying was evaluated for choking properties. The chalking property evaluates whether or not the dried coating agent adheres to the cutting equipment and molds and does not contaminate it.A cloth is strongly rubbed on a coated test sample and dried. Was determined according to the following three-step criteria based on the degree of peeling or adhesion to the cloth. 3: No adhesion of the coating agent to the cloth was observed. 2: Transfer of the coating agent to the cloth was slightly observed, but most of the coating agent remained on the surface of the test piece. 1: The coating agent adhered to the cloth, and the residue on the surface of the test piece was small.

(8) Paintability test (drying speed) Aluminum alloy plate for automobile body panel (5.0% M
g-Al annealed material, plate thickness 1.0 mm), as a pretreatment, caustic etching (45% NaOH 5% aqueous solution 6%)
Immersion for 5 seconds), washing with water, neutralization treatment (immersion in an aqueous solution of HNO ₃ for 5 seconds), washing with water, and drying. 3
A coating agent was applied to both sides of the plate. After application, 100 ℃
The film was dried in an atmosphere of × 45 seconds to obtain a dry film amount of 1 g / m ² , and the degree of drying of the coating film immediately after the film was dried (within 10 seconds after the film was dried) was evaluated according to the following three grades. Was determined. 5: The surface is dry, there is no stickiness, and the drying property is very good. 4: The surface is dry, there is almost no stickiness, and the drying property is good. 3: The surface is dry, but some stickiness is observed. 2: The surface is almost dry, but partly sticky. 1: The surface is undried, sticky as a whole, and poor drying property.

(9) Wetting test Aluminum alloy plate for automobile body panel (5.0% M
g-Al annealed material, plate thickness 1.0 mm), as a pretreatment, caustic etching (45% NaOH 5% aqueous solution 6%)
Immersion for 5 seconds), washing with water, neutralization treatment (immersion in an aqueous solution of HNO ₃ for 5 seconds), washing with water, and drying. 3
The coating agent was applied to both sides of the plate by observing the state of application at that time.
The evaluation was based on a scale of the scale. 3: The state where the coating agent was uniformly applied to the aluminum alloy plate and the wettability was good. 2: A state in which the coating agent partially repels on the aluminum alloy plate and has poor wettability. 1: A state in which the coating agent is repelled on the aluminum alloy plate and is not applied well and has poor wettability. Next, acrylic resins used in Examples and Comparative Examples are shown. Styrene acrylic resin of component (B) Styrene acrylic resin represented by the following average unit formula (total acid value: 30 mgKOH / g).

[0039]

Embedded image_TwoC (R¹ ) (COOR^Two) -CH (C₆H
_Five) -CH_Two−

However, this styrene acrylic resin is represented by R
¹ Is a hydrogen atom or a methyl group, R^TwoIs a hydrogen atom, a methyl group,
Multiple types of ethyl, butyl or ethylhexyl groups
Is included. Note that this styrene
The cryl resin is a run having a styrene content of 15% by mass.
It is a dam copolymer. Acrylic resin of component (C) An acrylic resin represented by the following average unit formula (total acid value:
100 mg KOH / g).

[0041]

Embedded image_TwoC (R^Three ) (COOR^Four)-(2)

However, this acrylic resin is represented by R^Three Is hydrogen
Atom or methyl group, R^FourIs hydrogen atom, methyl group, ethyl
Group, butyl group or ethylhexyl group
It includes a unit formula. (D) Component polyoxyethylene nonylphenyl ether
(1) Polyoxyethylene nonylphenyl ether of the following formula
(HLB value: 18.2, average n = 50).

[0043]

Embedded image C ₉ H ₁₉ —Ph—O— (CH ₂ CH ₂ O) _n —H (3)

Example 1 49% by mass of styrene acrylic resin, 24.5% by mass of acrylic resin, calcium stearate 2
A composition 20.4 obtained by mixing 4.5% by mass, 1.5% by mass of polyoxyethylene nonylphenyl ether and 1.5% by mass of modified silicone as an antifoaming agent as an auxiliary component.
The plastic working coating agent composition was prepared by mixing 79.6% by mass of water and 79.6% by mass of water.

Examples 2 to 6 A plastic working coating agent composition was prepared in the same manner as in Example 1 except that the mixing ratio of each component was changed to the amount shown in Table 1.

Comparative Example 1 A plastic working coating agent composition was prepared in the same manner as in Example 1 except that the acrylic resin was not blended and the blending ratio of each component was changed to the amount shown in Table 2.

Comparative Examples 2 to 6 Plastic working coating compositions were prepared in the same manner as in Example 1 using the components shown in Table 2 and the proportions thereof.
Each test was performed using the plastic working coating agent compositions of Examples 1 to 5 and Comparative Examples 1 to 7 as coating agents. The results are shown in Tables 1 and 2.

[0048]

[Table 1]

[0049]

[Table 2]

[0050]

EFFECT OF THE INVENTION The plastic working coating composition of the present invention is extremely effective for improving plastic formability, especially press formability.
It is excellent in drying property at the time of coating and choking property of the coating film, and is further excellent in zinc phosphate coating treatment property. Therefore, the plastic working coating composition of the present invention is extremely useful in practical use.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinobu Kumeyama 85 Hiramatsu, Susono-shi, Shizuoka Prefecture Mitsubishi Aluminum Corporation Technology Development Center (72) Inventor Kenichi Kameyama 85 Hiramatsu, Susono-city, Shizuoka Prefecture Mitsubishi Aluminum Corporation Technology Development Center Inside

Claims (2)

[Claims] (1) A metal salt of stearic acid (A) of 15 to 35
Parts by mass, (B) the average unit formula is represented by the following formula (1),
Styrene catalyst having an acid value of 10 to 120 mgKOH / g
20 to 60 parts by mass of the resin, (C) the average unit formula is as follows:
Represented by the formula (2) and having a total acid value of 10 to 300 mgKOH /
g of acrylic resin in a ratio of 10 to 40 parts by mass
And the styrene acrylic resin of the component (B) and the component (C)
Of the total amount of the acrylic resin is 47 to 84.9 parts by mass.
A plastic working coating composition comprising: Embedded image_TwoC (R¹ ) (COOR^Two) -CH (C₆H_Five) -CH_Two-(1) (where R¹ Is a hydrogen atom or a methyl group, R^TwoIs a hydrogen atom or
Is a linear or branched alkyl group having 1 to 10 carbon atoms
Represent. ) [Image Omitted] -CH_TwoC (R^Three ) (COOR^Four)-(2) (wherein, R^Three Is a hydrogen atom or a methyl group, R^FourIs a hydrogen atom or
Is a linear or branched alkyl group having 1 to 10 carbon atoms
Represent. ) 2. The composition of claim 1, further comprising (D) 0.1 to 14 parts by mass of a polyoxyethylene ether of the following formula (3), wherein (A), (B), (C) and (D) The plastic working coating composition according to claim 1, wherein the total amount of each component is 100 parts by mass. Embedded image R—O— (CH ₂ CH ₂ O) _n —H (3) (wherein, R represents an alkyl group, an alkenyl group, an alkylphenyl group, or a lanolin residue, and n is an integer of 5 or more. Represents.)