JP2002308949A - Compatibility improver composition and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a compatibility improver composition which improves the compatibility of a cellulose derivative with a chlorinated polyolefin and improves the stability of a solution containing them and the uniformity of a coating film. SOLUTION: The compatibility improver composition comprises a resin obtained by graft copolymerizing at least one kind selected from an α,β-unsaturated carboxylic acid and its anhydride to at least one kind selected from a polypropylene and a propylene/α-olefin copolymer, then chlorinating the resulting graft copolymer to obtain an acid modified chlorinated polyolefin, reacting the acid modified chlorinated polyolefin with a (meth)acrylic ester having one hydroxyl group to effect ester bonding, and subsequently graft copolymerizing a (meth)acrylic ester based monomer and cellulose acetate butyrate to the resulting product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compatibility improver composition (compatibilizer composition), and more particularly to a primer paint or primerless paint used for painting the surface of a polyolefin resin such as polypropylene. The present invention relates to a compatibility improver composition for improving the compatibility between a chlorinated polyolefin and a cellulose derivative to be blended in a paint.

[0002]

BACKGROUND OF THE INVENTION Polyolefin resins such as polypropylene have been used in large quantities in automobile parts and the like because of their excellent properties and low cost. However, unlike synthetic resins having a polarity such as a polyurethane resin, a polyamide resin, an acrylic resin, and a polyester resin, they have a problem that painting and bonding are difficult because they are nonpolar and crystalline.

[0003] In order to solve this problem, there have been proposed various methods using a primer composition such as that found in automotive bumper coating (for example, Japanese Patent Publication No. Hei 6-2771).

As a polypropylene bumper coating, a primer coating obtained by adding a chlorinated polyolefin as an adhesive to a polypropylene substrate to an acrylic resin, an alkyd resin, a pigment, a stabilizer or the like is applied to the polypropylene bumper substrate, and then the primer coating is applied. In general, there is a method of applying a base paint or a clear top paint, and a method of applying a primerless paint or a clear top paint in which the primer paint and the base paint are integrated. Recently, cost reduction,
Many studies on primerless paints have been conducted with the aim of shortening the painting process.

[0005] In many cases, this primerless paint has metal powder dispersed in order to finish it in a metallic tone. In this primerless paint, one of the objectives is to control the arrangement of metal powders in order to control the metal appearance of the coating film, the whiteness of the metal, and the unevenness of the metal. Derivatives are blended to form paints (for example,
No. 252664). However, the cellulose derivative and the chlorinated polyolefin compounded as an adhesive have poor compatibility, and there is a problem that the coating solution is separated even if mixed, and that the coating film is hardly formed into a uniform film.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to improve the compatibility between a cellulose derivative and a chlorinated polyolefin, to stabilize a solution containing these, and to obtain a uniform coating film. An object of the present invention is to provide a compatibility improver composition for improving compatibility.

[0007]

As a result of various studies, the present inventors have made an ester bond between an acid-modified chlorinated polyolefin and a hydroxyl group-containing (meth) acrylate,
The compatibility and solution stability are improved by introducing a double bond into the acid-modified chlorinated polyolefin and further graft-copolymerizing the (meth) acrylic acid-based monomer and cellulose acetate butyrate. The inventors have found that the present invention has been completed.

That is, the present invention provides a compatibility improver composition and a method for producing the same as described below. Item 1. At least one selected from polypropylene and a propylene-α-olefin copolymer has α, β-
After graft copolymerization of at least one selected from unsaturated carboxylic acids and acid anhydrides thereof, and chlorination to obtain an acid-modified chlorinated polyolefin, a (meth) acrylic acid ester having one hydroxyl group was ester-bonded. A compatibility improver composition comprising a resin obtained by graft copolymerizing a (meth) acrylic acid monomer and cellulose acetate butyrate. Item 2. For at least one selected from polypropylene and propylene-α-olefin copolymer, α,
Item 2. The composition according to item 1, wherein 0.1 to 10% by weight of at least one selected from β-unsaturated carboxylic acids and acid anhydrides thereof is graft copolymerized. Item 3. The chlorine content of the acid-modified chlorinated polyolefin is 1
Item 3. The composition according to Item 1 or 2, which is 6 to 35% by weight. Item 4. Item 4. The composition according to any one of Items 1 to 3, wherein the weight ratio of the (meth) acrylic acid monomer and the cellulose acetate butyrate to the acid-modified chlorinated polyolefin is from 50:50 to 97: 3. Item 5. Item 5. The composition according to any one of Items 1 to 4, wherein the weight ratio of the (meth) acrylic acid-based monomer and the cellulose acetate butyrate is 90:10 to 99: 1. Item 6. Item 6. The composition according to any one of Items 1 to 5, wherein the (meth) acrylic acid-based monomer contains 20 to 80% by weight of cyclohexyl (meth) acrylate. Item 7. At least one selected from polypropylene and a propylene-α-olefin copolymer has α, β-
At least one selected from unsaturated carboxylic acids and their anhydrides is graft-copolymerized and then chlorinated to form an acid-modified chlorinated polyolefin, and then heated to convert the carboxyl group into an anhydride group. A method for producing a compatibility improver composition, comprising graft-copolymerizing a (meth) acrylic acid-based monomer and cellulose acetate butyrate after ester-bonding a hydroxyl group of a hydroxyl group-containing (meth) acrylic ester with a hydroxyl group. .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In order to produce the compatibility improver composition of the present invention, first, polypropylene and propylene-
An acid-modified polyolefin (a) is obtained by graft-copolymerizing at least one selected from α, β-unsaturated carboxylic acids and acid anhydrides thereof with at least one selected from α-olefin copolymers.

The polypropylene and propylene-α-olefin copolymer used in the present invention are crystalline,
Not related to amorphous. The propylene-α-olefin copolymer is obtained by copolymerizing α-olefin with propylene as a main component. As an α-olefin,
For example, one or several kinds of ethylene, 1-butene, 1-heptene, 1-octene, 4-methyl-1-pentene and the like can be used. The ratio between the propylene component and the α-olefin component of the propylene-α-olefin copolymer is not particularly limited, but the propylene component is desirably 50 mol% or more.

In the present invention, the α, β-unsaturated carboxylic acid or its acid anhydride graft-copolymerized with polypropylene or propylene-α-olefin copolymer includes, for example, maleic acid, itaconic acid, citraconic acid and Acid anhydrides. Of these, acid anhydrides are preferred, and maleic anhydride and itaconic anhydride are more preferred. The amount for graft copolymerization is 0.1 to 10
%, More preferably 1 to 5% by weight.

As a method of graft copolymerizing an α, β-unsaturated carboxylic acid or an acid anhydride thereof with a polypropylene or a propylene-α-olefin copolymer, there are known methods such as a solution method and a melting method.

The solution method is carried out, for example, as follows.
That is, polypropylene or a propylene-α-olefin copolymer is added to an aromatic organic solvent such as toluene for 10 minutes.
After dissolving at 0 to 180 ° C., an α, β-unsaturated carboxylic acid or an acid anhydride thereof is added, and an organic peroxide having a high hydrogen abstracting effect as a radical generator is added in a lump or in a divided manner. Let it. The reaction solution is poured into a ketone-based organic solvent such as acetone, and the resin is taken out and dried to obtain an acid-modified polyolefin (a).

The melting method is performed, for example, as follows.
That is, after a polypropylene or a propylene-α-olefin copolymer is heated and melted to a melting point or higher, α, β
-Reacting with an unsaturated carboxylic acid or an acid anhydride thereof by adding an organic peroxide as a radical generator; After the reaction, the unreacted α, β-unsaturated carboxylic acid or its acid anhydride is removed by reducing the pressure in the molten state to obtain an acid-modified polyolefin (a). In the melting method, a kneader or an extruder is used.

The organic peroxide used as the radical generator includes, for example, benzoyl peroxide, dicumyl peroxide, di-t-butyl peroxide and the like, and can be selected according to the reaction temperature and the decomposition temperature. it can.

Next, the acid-modified polyolefin (a) obtained by the above method is chlorinated to obtain an acid-modified chlorinated polyolefin (b).

In the chlorination, for example, the acid-modified polyolefin (a) is dissolved in a chlorine-based solvent and the chlorine content is 16 to 35% by weight in the presence or absence of a radical catalyst.
Until chlorine gas is blown. Examples of the chlorinated solvent include tetrachloroethylene, tetrachloroethane, carbon tetrachloride, chloroform and the like. The dissolution and reaction temperature is desirably equal to or higher than the temperature at which the acid-modified polyolefin (a) dissolves in the chlorinated solvent.

Incidentally, polypropylene or propylene-
The acid-modified polyolefin (a) obtained by acid modification of the α-olefin copolymer has an acid component used for acid modification of α, β-
When it is an unsaturated carboxylic acid, it has a dicarboxyl group, and when the acid component used for acid modification is an acid anhydride of an α, β-unsaturated carboxylic acid, it has an acid anhydride group. ing. However, since the acid anhydride group easily opens the ring by absorbing moisture in the air or the solvent, the acid-modified chlorinated polyolefin (b) is changed to a dicarboxyl group over time. There are often.

Therefore, before the acid-modified chlorinated polyolefin (b) is reacted with the hydroxyl group-containing (meth) acrylate, the acid-modified chlorinated polyolefin (b) is dissolved or dispersed in, for example, an organic solvent. It is preferable to convert the dicarboxyl group into an acid anhydride group by heat dehydration. After the dicarboxyl group is thus closed to form an acid anhydride group, it has one hydroxyl group (meth)
The acrylate ester is reacted and esterified to introduce a double bond into the acid-modified chlorinated polyolefin (b).

An ester bond between a carboxyl group and a hydroxyl group can be formed by using an esterification catalyst. However, the esterification catalyst may remain in the final composition and affect coating performance. Therefore, it is preferable that an acid anhydride group which is easily esterified with a hydroxyl group is formed in advance, and this acid anhydride group is ester-bonded to the hydroxyl group of the hydroxyl group-containing (meth) acrylate.

Examples of the solvent at this time include benzene, toluene, xylene, cyclohexane, methylcyclohexane, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, tetrahydrofuran, propylene glycol and the like. One or more solvents may be mixed. Can be used. However, heating is necessary in order to form the acid anhydride group in advance, and it is preferable to use a solvent having a boiling point of 120 ° C. or higher, or to heat while applying pressure in a pressurizable container. The heating conditions include a heating temperature of 110 to 1
The temperature is preferably about 35 ° C., and the heating time is preferably about 30 minutes to 2 hours.

Examples of the hydroxyl group-containing (meth) acrylate used for the ester bond include 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, polypropylene glycol acrylate, 2-hydroxyethyl methacrylate, and methacrylic acid. (Hydroxypropyl) and (meth) acrylate having one hydroxyl group such as polypropylene glycol methacrylate are exemplified. It is not preferable to use a (meth) acrylate having two or more hydroxyl groups, since crosslinking starts at the stage of ester bonding and gelation proceeds.

Next, as described above, the acid-modified chlorinated polyolefin having a double bond introduced by esterification is
A (meth) acrylic acid-based monomer and cellulose acetate butyrate (hereinafter sometimes abbreviated as “CAB”) are graft-copolymerized to obtain a CAB-modified chlorinated polyolefin (c).

The method of the graft copolymerization may be any of a method of heating and polymerizing an acid-modified chlorinated polyolefin having a double bond introduced above its melting point or a method of dissolving and reacting in an organic solvent. Can be carried out by the same method and apparatus as in the case of the reaction for graft copolymerizing at least one selected from α, β-unsaturated carboxylic acids and acid anhydrides thereof.

In the graft copolymerization, (meth)
The weight ratio of acrylic acid monomer and cellulose acetate butyrate to acid-modified chlorinated polyolefin is 5
It is preferable that the ratio be 0:50 to 97: 3. That is, it is preferable to graft copolymerize the (meth) acrylic acid monomer and the cellulose acetate butyrate in an amount of 50 to 97% by weight. The total amount of the (meth) acrylic acid monomer and the cellulose acetate butyrate is 50
If the amount is less than 100% by weight, the compatibility with the cellulose derivative or the like tends not to be improved, and if it exceeds 97% by weight, the compatibility with the chlorinated polyolefin tends to decrease.

In the graft copolymerization, for example, after a (meth) acrylate having one hydroxyl group is ester-bonded to an acid-modified chlorinated polyolefin to introduce a double bond, the temperature of the reaction solution is maintained, It can be carried out by dropping a mixture of a (meth) acrylic acid-based monomer, cellulose acetate butyrate and a radical generator into an acid-modified chlorinated polyolefin solution having a double bond introduced therein.

Cellulose acetate butyrate is a cellulose derivative obtained by subjecting a partially acetylated product of cellulose to butyl ester. Particularly preferred are those having an acetyl group content of 1 to 14% by weight and a butyl group content of 3%.
5-60% by weight, ASTM-D1343-54T
In the range of 0.005 to 5 seconds when measured by the viscosity measurement method described in (1). Specifically, the product name “CAB-55” manufactured by Eastman Chemical Co., Ltd.
1-0.01 "or the like is used.

The weight ratio of the (meth) acrylic acid monomer and cellulose acetate butyrate used is 90: 1.
It is preferably from 0 to 99: 1. That is, the ratio of cellulose acetate butyrate in the monomer to be graft-copolymerized is preferably 1 to 10% by weight. If the content of cellulose acetate butyrate is less than 1% by weight, the compatibility tends not to be improved, and if it exceeds 10% by weight, the stability of the solution tends to be poor.

Examples of the (meth) acrylic acid-based monomer to be graft-copolymerized include (meth) acrylic acid and (meth) acrylate. (Meth) acrylates include methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, cyclohexyl acrylate, polypropylene glycol acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-methacrylate Butyl, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, cyclohexyl methacrylate Methacrylic acid polypropylene glycol, and the like.

The (meth) acrylic acid-based monomer to be graft-copolymerized preferably contains 20 to 80% by weight of cyclohexyl (meth) acrylate from the viewpoint of solution stability. If the content of cyclohexyl (meth) acrylate is less than 20% by weight, the stability of the solution is degraded and the two layers tend to be separated. On the other hand, if it exceeds 80% by weight, the performance as a compatibility improver tends to be poor.

Examples of the radical generator include organic peroxides such as benzoyl peroxide, t-butylperoxy-2-ethylhexanoate, azobisisobutyronitrile, dimethyl 2,2-azobisisobutyrate and the like. Can be used, but it is preferable to use an organic peroxide.

The composition of the present invention can be used by adding to a mixture of a cellulose derivative and a chlorinated polyolefin, further adding a pigment thereto, and kneading the mixture. As the pigment, inorganic pigments such as carbon black, titanium dioxide, talc, zinc white, and aluminum paste, and organic pigments such as an azo pigment can be used. Further, the obtained resin composition solution is a uniform solution at a practical concentration, and a coating film obtained by casting the same on a film or the like is uniform and transparent.

[0033]

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

Production Example 1 Isotactic polypropylene (Mw = about 4500)
0) 50.0 g, 3.5 g of maleic anhydride (manufactured by NOF Corporation), 1.0 g of dicumyl peroxide (manufactured by NOF Corporation) and 75.0 g of toluene were charged into an autoclave equipped with a stirrer. After sealing, nitrogen replacement was performed for 5 minutes, and the mixture was heated and stirred at 140 ° C for 5 minutes.
A time reaction was performed. After completion of the reaction, the reaction solution was poured into a large amount of methyl ethyl ketone to precipitate a resin. The acid-modified polyolefin was taken out, washed several times with methyl ethyl ketone, and then dried to obtain an acid-modified polyolefin (Mw = 40000, acid addition amount 2% by weight). 50.0 g of this resin and 450.0 g of tetrachloroethylene
Was charged into a four-necked flask equipped with a condenser, a thermometer and a stirrer, and heated, stirred and dissolved. After confirming that the acid-modified polyolefin was dissolved at 110 ° C., 0.5 g of di-t-butyl peroxide was charged, 31.3 g of chlorine gas was blown in, and tetrachloroethylene was distilled off. Then, the solvent was replaced with xylene. An acid-modified chlorinated polyolefin (chlorine content: 22.1% by weight, acid addition amount: 1.4% by weight) was obtained.

Production Example 2 Maleic anhydride grafting was carried out in the same manner as in Production Example 1 except that a crystalline propylene-ethylene copolymer (Mw = 400000, ethylene content: 7 mol%) was used instead of isotactic polypropylene. After copolymerization and chlorination, acid-modified chlorinated polyolefin (Mw = 10000)
0, a chlorine content of 21.2% by weight, and an acid addition amount of 1.6% by weight).

Production Example 3 A maleic anhydride was prepared in the same manner as in Production Example 1 except that an amorphous propylene-butene copolymer (Mw = 40000, butene content: 30 mol%) was used instead of isotactic polypropylene. Perform graft copolymerization and chlorination,
An acid-modified chlorinated polyolefin (Mw = 35,000, chlorine content 16.5% by weight, acid addition 2.0% by weight) was obtained.

Example 1 In a four-necked flask equipped with a stirrer, a condenser, a thermometer and a dropping funnel, 15 parts by weight of the acid-modified chlorinated polyolefin obtained in Production Example 1 was dissolved in 45 parts by weight of xylene. And 120 ° C. for 1 hour. To this, 2 parts by weight of polypropylene glycol methacrylate was added, and stirring was continued to facilitate ester bonding. Thereafter, 30 parts by weight of cyclohexyl methacrylate, 25 parts of methyl methacrylate
Parts by weight, 20 parts by weight of n-butyl methacrylate, 3 parts by weight of methacrylic acid, cellulose acetate butyrate (CAB-551-0.01, manufactured by Eastman Chemical Company)
A solution obtained by sufficiently mixing parts by weight, 165.3 parts by weight of xylene, 23 parts by weight of butyl acetate, and 1.7 parts by weight of t-butylperoxy-2-ethylhexanoate was added dropwise over 3 hours. The reaction was continued for 5 hours with sufficient stirring, and then cooled.

The concentration of the obtained resin solution (CAB-modified chlorinated polyolefin solution) was 30% by weight, and the solution viscosity at 23 ° C. was 280 mPa · s. The weight average molecular weight of the resin was 60000.

Example 2 Esterification and graft copolymerization were carried out in the same manner as in Example 1 except that the acid-modified chlorinated polyolefin obtained in Production Example 2 was used instead of the acid-modified chlorinated polyolefin obtained in Production Example 1. Polymerization was performed to obtain a resin solution.

Example 3 Esterification and graft copolymerization were carried out in the same manner as in Example 1 except that the acid-modified chlorinated polyolefin obtained in Production Example 3 was used instead of the acid-modified chlorinated polyolefin obtained in Production Example 1. Polymerization was performed to obtain a resin solution.

Comparative Example 1 Same as Example 1 except that polypropylene glycol methacrylate was not added in advance, but was mixed and dropped with another (meth) acrylic acid-based monomer and cellulose acetate butyrate during graft copolymerization. Thus, a resin solution was obtained.

With respect to the resin solutions (CAB-modified chlorinated polyolefin solutions) obtained in Examples 1 to 3 and Comparative Example 1, the solution appearance was evaluated. Furthermore, compatibility with CAB,
Compatibility with chlorinated polyolefin (CPO), CAB, CPO and CAB modified chlorinated polyolefin (CAB-C)
Evaluation of compatibility and adhesion of PO) was performed by the following methods. Table 1 shows the results.

Evaluation Method 1) Compatibility with CAB: CAB-
381-2 (manufactured by Eastman Chemical Co., Ltd.) was dissolved in butyl acetate, and this solution was mixed with the above-mentioned CAB-modified chlorinated polyolefin solution (resin content of 30% by weight xylene solution) so that the resin ratio was 1: 1. 50 μm on a glass plate
And dried at 80 ° C. for 30 minutes to confirm the transparency of the film.

2) Compatibility with CPO: To confirm compatibility, toluene of Hardlen HM21 (acid-modified chlorinated polypropylene, manufactured by Toyo Kasei Kogyo Co., Ltd., chlorine content 21% by weight, resin content 20% by weight) was used. The solution and the CAB-modified chlorinated polyolefin solution (resin content of 30% by weight xylene solution) are mixed so that the resin ratio becomes 1: 1, applied to a glass plate with a 50 μm applicator, and dried at 80 ° C. for 30 minutes. After that, the transparency of the film was confirmed.

3) Compatibility of CAB, CPO and CAB-CPO: To confirm the compatibility of CAB, CPO and CAB-modified chlorinated polyolefin, a butyl acetate solution of 20% by weight of resin of CAB-381-2 and HM21 harden And a CAB-modified chlorinated polyolefin solution (resin content of 30% by weight xylene solution) was mixed at a resin content ratio of 1: 1: 1 to check the solution state. Further, the film was applied to a glass plate with a 50 μm applicator and dried at 80 ° C. for 30 minutes to confirm the transparency of the film.

4) Adhesion: A mixture of CAB, CPO and CAB-modified chlorinated polyolefin, and polypropylene (P
P) In order to confirm the adhesion to the plate, a 20% by weight butyl acetate solution of CAB-381-2 resin, a 20% by weight resin solution of hardlen HM21 and a toluene solution of CAB-modified chlorinated polyolefin (30% by weight resin) Xylene solution)
Was mixed so that the resin content ratio was 3: 2: 5, titanium oxide was added at 0.5% by weight with respect to the resin content, and the mixture was further sufficiently stirred, and then the surface was wiped with isopropanol (IPA). The plate was spray-coated so that the thickness of the coating after drying was 10 μm. After the coating, the film was blow-dried at 80 ° C., returned to room temperature, and subjected to an adhesion test. The adhesion test is
The test was performed according to the cross cut test of JIS K5400.

[0047]

[Table 1]

The meanings of the abbreviations in Table 1 are as follows. P
GMA: polypropylene glycol methacrylate, CH
MA: cyclohexyl methacrylate, MMA: methyl methacrylate, n-BMA: n-butyl methacrylate, M
AA: Methacrylic acid.

[0049]

The compatibility improver composition of the present invention can improve the compatibility between a cellulose derivative and a chlorinated polyolefin, and can improve the stability of a solution containing these and the uniformity of a coating film. .

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Sugiyama 1-17-13 Hanakawa, Nishiyodogawa-ku, Osaka-shi, Osaka (72) Inventor Shinichi Akiyama 4-3-9, Imazunaka, Tsurumi-ku, Osaka-shi, Osaka 4J026 AA02 AC08 AC22 BA27 BA30 CA02 CA06 DB02 GA01 GA02 4J038 BA021 BA022 CB171 CB172 CP062 NA25 PB07 PC08

Claims (7)

[Claims] 1. Polypropylene and propylene-α-
At least one selected from olefin copolymers,
After graft copolymerizing at least one selected from α, β-unsaturated carboxylic acids and acid anhydrides thereof, and then chlorinating to obtain an acid-modified chlorinated polyolefin, a (meth) acrylate having one hydroxyl group is obtained. A compatibility improver composition comprising a resin obtained by graft copolymerizing a (meth) acrylic acid-based monomer and cellulose acetate butyrate after forming an ester bond. 2. Polypropylene and propylene-α-
2. The graft copolymer according to claim 1, wherein 0.1 to 10% by weight of at least one selected from α, β-unsaturated carboxylic acids and acid anhydrides thereof is graft copolymerized with at least one selected from olefin copolymers. Composition. 3. The composition according to claim 1, wherein the chlorine content of the acid-modified chlorinated polyolefin is 16 to 35% by weight. 4. The composition according to claim 1, wherein the weight ratio of the (meth) acrylic acid monomer and the cellulose acetate butyrate to the acid-modified chlorinated polyolefin is 50:50 to 97: 3. . 5. The weight ratio of the (meth) acrylic acid monomer to the cellulose acetate butyrate is 90:10 to 9
The composition according to any one of claims 1 to 4, wherein the composition is 9: 1. 6. The composition according to claim 1, wherein the (meth) acrylic acid-based monomer contains 20 to 80% by weight of cyclohexyl (meth) acrylate. 7. Polypropylene and propylene-α-
At least one selected from olefin copolymers,
graft copolymerization of at least one selected from α, β-unsaturated carboxylic acids and their anhydrides, followed by chlorination to obtain an acid-modified chlorinated polyolefin, followed by heating to convert the carboxyl group into an acid anhydride group; A compatibility improver composition comprising the step of forming an ester bond between the acid anhydride group and the hydroxyl group of a hydroxyl group-containing (meth) acrylic ester, followed by graft copolymerization of a (meth) acrylic acid monomer and cellulose acetate butyrate. Method of manufacturing a product.