JPH11240994A - Resin composition for molding sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition capable of molding a sheet excellent in mechanical strength, chemical resistance and appearance properties without causing trouble about production cost, etc., and having general-purpose properties. SOLUTION: This resin composition is obtained by compounding (A) a graft copolymer prepared by carrying out the graft polymerization of a diene-based rubber-like polymer with a monomeric mixture containing an aromatic vinylic monomer and a vinyl cyanide-based monomer with (C) an acrylic copolymer. The acrylic copolymer (C) is obtained by conducting the three-stage polymerization of (C3) a monomer component containing methyl methacrylate in the presence of (C1) a copolymer component containing methyl methacrylate and (C2) a copolymer component of a monomeric mixture containing an alkyl methacrylate and an alkyl acrylate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a low fisheye generation amount even when a sheet is formed from powder.
The present invention relates to a sheet molding resin composition having high gloss and excellent appearance.

[0002]

2. Description of the Related Art ABS resins are used in a wide range of application fields because they have workability suitable for extrusion molding and injection molding and have excellent resin appearance, mechanical strength and chemical resistance.

[0003]

However, many fish eyes are generated on the sheet surface due to poor dispersion of the rubbery polymer, which often causes a problem in appearance. As a method of improving the dispersion failure of the rubber-like polymer, there is a method of forming into a pellet by a twin-screw extruder or the like having high kneading performance before forming the sheet. But,
The method has the drawback that the equipment, the steps are complicated, and the manufacturing cost is high. Therefore, if a sheet with good appearance can be formed from powder, it can be used in more fields. Therefore, there is a demand for the development of an ABS resin capable of forming a sheet having a good appearance from powder without impairing the inherent performance of the ABS resin.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be applied to a case where a sheet is formed from a powder without inconvenience such as complicated facilities, steps, and manufacturing costs.
It aims to provide a resin composition that exhibits mechanical strength and chemical resistance, can form a sheet with excellent surface appearance such as low fisheye and excellent gloss, and can be applied to a wide range of uses. And

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems. As a result, fish eyes are caused by poor rubber dispersion.
By specifying the reduced viscosity of the acetone-soluble component of the graft copolymer, or the reduced viscosity of the copolymer, and further using an acrylic copolymer having the specified structure, it is possible to form a sheet from the powder. The present inventors have found that a resin composition capable of forming a sheet excellent in glossiness while reducing fish eyes can be obtained, and the present invention has been achieved.

The resin composition for forming a sheet of the present invention comprises 0.1 to 15 parts by weight of an acrylic copolymer (C) based on 100 parts by weight of a resin composition containing a graft copolymer (A). The compounded resin composition for sheet molding. Here, the graft copolymer (A) is composed of 5 to 70% by weight of a diene rubbery polymer having a diene monomer as a main component, 60 to 90% by weight of an aromatic vinyl monomer, and cyanide. Monomer mixture 95 containing 10 to 40% by weight of a vinyl monomer
A polymer obtained by graft-polymerizing about 30% by weight of a solution obtained by dissolving 0.2 g of an acetone-soluble component in 100 ml of N, N'-dimethylformamide has a reduced viscosity of 0.7 to 1.3 dl at 25 ° C. / G. Further, the acrylic copolymer (C) is composed of a component (C1), a component (C2),
The (C3) component is obtained by three-stage polymerization. Here, (C
1) The component is methyl methacrylate at least 80
A polymer or copolymer (hereinafter referred to as a (co) polymer) obtained by polymerizing a monomer or a monomer mixture containing 10% by weight,
A solution obtained by dissolving 0.1 g of the (co) polymer in 0 ml of chloroform has a reduced viscosity of 2 dl /
g or more. The component (C2) is defined as 30 to 70% by weight of an alkyl group having 1 to 18 carbon atoms and 30 to 70% by weight of an alkyl group having 1 to 18 carbon atoms in the presence of 10 to 45 parts by weight of the component (C1). 18 alkyl acrylates 7
It is a copolymer obtained by polymerizing 40 to 70 parts by weight of a monomer mixture containing 0 to 30% by weight under a condition that the reduced viscosity is 1 dl / g or less. The component (C3) is obtained by polymerizing 5 to 40 parts by weight of a monomer or a monomer mixture containing at least 50% by weight of methyl methacrylate under the condition that the reduced viscosity of the component (C3) is 2 dl / g or more. It is.

Also, an acrylic copolymer (100 parts by weight) containing at least 10% by weight of the graft copolymer (A) and 90% by weight or less of the copolymer (B) is used. Those containing 0.1 to 15 parts by weight of C) are also desirable. Here, the copolymer (B) is a copolymer composed of at least 60 to 90% by weight of an aromatic vinyl monomer and 10 to 40% by weight of a vinyl cyanide monomer. 2 g of N, N'-dimethylformamide 10
The reduced viscosity at 25 ° C. of the solution dissolved in 0 ml is 0.7 to 1.5 dl / g. The copolymer (B) includes aromatic vinyl monomers 60 to 9
0% by weight and 10 to 40% by weight of a vinyl cyanide monomer
It is preferable that the copolymer is a copolymer comprising 30% by weight or less of another vinyl monomer copolymerizable with these.

As the graft copolymer (A), diene rubbery polymers having a diene monomer as a main component are used.
% To 60% to 90% by weight of an aromatic vinyl monomer,
A graft copolymer obtained by graft polymerization of 95 to 30% by weight of a monomer mixture comprising 10 to 40% by weight of a vinyl cyanide monomer and 20% by weight or less of another vinyl monomer copolymerizable therewith. Desirably, it is a polymer. Also, (C
3) As components, at least 50% by weight of methyl methacrylate and 50% by weight of a monomer copolymerizable therewith.
A monomer mixture containing the following is desirable.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The graft copolymer (A) in the present invention comprises a diene rubber-based polymer having a diene monomer as a main component, 5 to 70% by weight, an aromatic vinyl monomer 60 to 90% by weight, and cyanide. A polymer obtained by graft polymerization of 95 to 30% by weight of a monomer mixture containing 10 to 40% by weight of a vinyl monomer, and 0.2 g of the acetone-soluble component in 100 ml of N, N'-dimethylformamide Has a reduced viscosity at 25 ° C. of 0.7 to 1.3 dl / g. The diene rubbery polymer is composed of 100 to 50% by weight of a diene monomer and 0 to 50% of a vinyl monomer copolymerizable therewith.
% By weight (total amount: 100% by weight) of 1,3-butadiene homopolymer or 1,3-butadiene homopolymer.
It is a copolymer composed of 50% by weight or more of butadiene. Examples of the copolymer include a copolymer with a butadiene-aromatic vinyl monomer such as a butadiene-styrene copolymer and a butadiene-methylstyrene copolymer; a butadiene-acrylonitrile copolymer, and a butadiene-methacrylic copolymer. Copolymer with butadiene-vinyl cyanide monomer such as lonitrile copolymer; butadiene-methyl acrylate copolymer, butadiene-ethyl acrylate copolymer, butadiene--2-ethylhexyl acrylate Butadiene-alkyl acrylate copolymers such as copolymers; butadiene-methyl methacrylate copolymers, butadiene-alkyl methacrylate copolymers; and 50% by weight of 1,3-butadiene units
The terpolymer composed of the above is also included. The content of the diene rubbery polymer is 5 to 70% by weight. When the content is less than 5% by weight, the impact strength of the sheet is inferior and therefore has no practical value, and when it exceeds 70% by weight, the appearance of the sheet is poor. The more preferable content of the diene rubbery polymer is 10 to 60% by weight.

[0010] The graft copolymer (A) of the present invention is prepared by adding an aromatic vinyl monomer 60 to 60 in the presence of 5 to 70 parts by weight (as solid content) of the diene rubbery polymer obtained by the above method. 95 to 30 parts by weight of a monomer mixture consisting of 90% by weight, 10 to 40% by weight of a vinyl cyanide monomer and 0 to 20% by weight of another monomer copolymerizable therewith. is there. Examples of the aromatic vinyl monomer in the present invention include styrene, α-methylstyrene, vinyltoluene, and halogen-substituted aromatic vinyl monomers, and these can be used alone or in combination of two or more. Examples of the vinyl cyanide monomer include acrylonitrile, methacrylonitrile, ethacrylonitrile and the like, and these can be used alone or in combination of two or more, but acrylonitrile is preferable.

The monomers copolymerizable therewith include alkyl methacrylates such as methyl methacrylate and ethyl methacrylate, alkyl acrylates such as methyl acrylate and ethyl acrylate butyl acrylate, and N-phenyl. Maleimide and the like can be mentioned, and they can be used alone or in combination of two or more. Examples of the method of graft polymerization include emulsion polymerization, suspension polymerization, solution polymerization, and bulk polymerization, and any method may be used. Emulsion graft polymerization is preferred as a method for obtaining a powdery substance used here. In this emulsion graft polymerization, ordinary emulsifiers and catalysts are used, and there are no particular restrictions on the types and amounts of additives.

Further, 0.2 g of an acetone-soluble component of the graft copolymer (A) was added to N, N'-dimethylformamide 10
The reduced viscosity at 25 ° C. of 0 ml of the dissolved solution is desirably 0.7 to 1.3 dl / g. 0.7d of reduced viscosity
If it is less than 1 / g, many fish eyes are generated and 1.3 d
If it is higher than 1 / g, the gloss of the sheet surface is reduced. More preferably, it is 0.8 to 1.2 dl / g. When graft-polymerizing a diene-based rubbery polymer, the monomers to be graft-polymerized may be added at once, may be added in portions, or the monomers may be individually grafted stepwise. Known antioxidants, stabilizers and the like can be added to the obtained graft polymer (A).

The copolymer (B) used in the present invention contains 10 to 40% by weight of a vinyl cyanide monomer and 60 to 90% by weight of an aromatic vinyl monomer, and is copolymerizable therewith. 0 to 30% by weight of other vinyl monomers (total amount 100%)
Is a copolymer obtained by polymerizing a monomer mixture consisting of
As these vinyl cyanide monomers and aromatic vinyl monomers, and other vinyl monomers copolymerizable therewith, those which are exactly the same as those used for the graft copolymer (A) can be used. Can be used. As a method for producing the copolymer (B), methods such as emulsion polymerization, suspension polymerization, solution polymerization, and bulk polymerization can be used. 0.2 g of this copolymer (B) is N,
The reduced viscosity at 25 ° C. of the solution dissolved in 100 ml of N′-dimethylformamide is desirably in the range of 0.7 to 1.5 dl / g, preferably 0.8 to 1.3 dl / g. If the reduced viscosity is less than 0.7 dl / g, many fish eyes are generated, and if the reduced viscosity is more than 1.5 dl / g, the gloss of the sheet surface is reduced. In the resin composition containing the graft copolymer (A) and the copolymer (B), the amount of the copolymer (B) used is 90 to 0% by weight, preferably 10 to 80% by weight. is there. 90
If the content is more than 10% by weight, the impact strength of the sheet-like material is reduced, and its practical value is lost.

The acrylic copolymer (C) used in the present invention has at least 80% by weight of methyl methacrylate, and was measured at 25 ° C. in a solution prepared by dissolving 0.1 g of the polymer in 100 ml of chloroform. Reduced viscosity is 2d
In the presence of 10 to 45 parts by weight of a polymer or copolymer (component (C1)) having an amount of 1 / g or more, an alkyl methacrylate 3 having 1 to 18 carbon atoms in the alkyl group as component (C2)
A mixture of 0 to 70% by weight and 70 to 30% by weight of an alkyl acrylate having 1 to 18 carbon atoms in the alkyl group;
70 parts by weight were polymerized under the condition that the reduced viscosity of the component (C2) was 1 dl / g or less, and the obtained (C1) and (C2) were obtained.
In the presence of a polymer containing both components, a monomer mixture 5 comprising 50 to 100% by weight of methyl methacrylate (C3) and 50 to 0% by weight of a monomer copolymerizable therewith.
To 40 parts by weight of the component (C3) having a reduced viscosity of 2 dl / g.
The polymerization ((C1), (C2), (C
3) A three-stage copolymer obtained by totaling 100 parts by weight of the components.

Here, the component (C1) is a polymethacrylate or a copolymer in which at least 80% by weight or more is methyl methacrylate. There is no particular limitation on the monomer of the methyl methacrylate copolymer. An appropriate monomer can be used depending on the purpose. For example, one or two or more of aromatic vinyl, unsaturated nitrile, acrylate or methacrylate other than methyl methacrylate are used, and the use amount is preferably 20% by weight or less. Further, a polyfunctional monomer such as divinylbenzene or allyl methacrylate is added to the (C
1) It can be used for components, but the amount used is 2
% By weight or less is preferred. Specific examples of the aromatic vinyl include styrene, and examples of the unsaturated nitrile include acrylonitrile, and examples of the acrylate and methacrylate include the following. As the acrylate used in the component (C2), for example, ethyl acrylate, butyl acrylate, isobutyl acrylate,
2-ethylhexyl acrylate and the like can be used. As the methacrylate, for example, methyl methacrylate, ethyl methacrylate, butyl methacrylate, benzyl methacrylate and the like can be used, but it is necessary that the methacrylate in the component (C2) be in the form of a random copolymer of the acrylate. is there.

In the monomer mixture of the component (C2), the content of alkyl methacrylate is preferably 30 to 70% by weight, and the content of alkyl acrylate is preferably 70 to 30% by weight. (C
3) The component is a monomer or monomer mixture containing at least 50% by weight of methyl methacrylate and 50% by weight or less of a monomer copolymerizable therewith. Examples of the monomer copolymerizable with methyl methacrylate include the above-mentioned aromatic vinyl, unsaturated nitrile, acrylate, and methacrylate other than methyl methacrylate.

The reduced viscosity of each copolymer is (C1), (C
2), (C3) These values are obtained when each component is polymerized alone, and can be arbitrarily adjusted by a chain transfer agent, polymerization conditions and the like. The method for determining the reduced viscosity of each component is as follows. First, each component alone is polymerized at a specified emulsifier, polymerization initiator, polymerization temperature,
A calibration curve of reduced viscosity is created using the chain transfer agent as a variable.
Then, in producing the three-stage polymer, the polymerization conditions are made the same as the conditions for obtaining the calibration curve, the reduced viscosity with respect to the amount of the chain transfer agent added is read from the calibration curve, and the value is used as the value of each component. This method is common to Examples and Comparative Examples described later.

The acrylic copolymer (C) of the present invention comprises:
A (co) polymer ((C1) component), a copolymer ((C2) component), a monomer or a monomer mixture ((C3) component) obtained by three-stage polymerization, wherein the (C1) component is 10 to 45 parts by weight, component (C2) 40 to 70 parts by weight, component (C3) 5
It is obtained by three-stage polymerization at a ratio of 40 parts by weight. The amount of the acrylic copolymer (C) used is 0.1 to 15 parts by weight with respect to 100 parts by weight of the resin composition containing the graft copolymer (A) or the copolymer (B). ,
Preferably it is 0.3 to 12 parts by weight. If the amount is less than 0.1 part by weight, many fish eyes are generated, and if the amount is more than 15 parts by weight, the gloss of the sheet surface is deteriorated.

The resin composition of the present invention is particularly suitable for molding a sheet-like molded product. The resin composition may be formed into pellets and then molded, but can be directly molded from powder. Even in such a case, it is possible to form a sheet having a good appearance on the surface such as having less fish eyes and excellent glossiness. Also, it has high mechanical strength and chemical resistance. The powder in the present invention has a weight average particle size of 20.
１０００1000 μm.

[0020]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples as long as the gist of the present invention is not exceeded. [Production of graft copolymer: A-1]

[Table 1]

The mixture 1 shown in Table 1 was charged into a reactor equipped with a stirrer, heated to 50 ° C., and the following polymerization initiator was added.
Stir for 1 hour. Ferrous sulfate 0.006 parts by weight Sodium pyrophosphate 0.12 parts by weight Deionized water 2.5 parts by weight Thereafter, the following monomer mixture was continuously dropped into this reaction system over 20 minutes to complete the polymerization. did. Acrylonitrile 9.0 parts by weight Styrene 21.0 parts by weight Cumene hydroperoxide 0.25 parts by weight The obtained graft polymer latex (conversion rate: 97%) is treated with an antioxidant ("ANTAGE W-" manufactured by Kawaguchi Chemical Industry Co., Ltd.). 40
After adding 0.5 parts by weight of "0" (trade name)), the mixture was poured into a 1% aqueous sulfuric acid solution at 85 ° C. to coagulate. This is separated, washed with water, dehydrated, and dried to obtain a white powdery graft copolymer (A).
-1) was obtained. The reduced viscosity at 25 ° C. of a solution obtained by dissolving 0.2 g of acetone-soluble component of this polymer in 100 ml of N, N′-dimethylformamide was 0.95 dl / g.

[Production of Graft Copolymer: A-2]

[Table 2] The mixture 2 shown in Table 2 was charged into a reactor equipped with a stirrer, and 5
After the temperature was raised to 0 ° C., the following polymerization initiator was added, and the mixture was stirred for 1 hour. Ferrous sulfate 0.006 parts by weight Sodium pyrophosphate 0.12 parts by weight Deionized water 2.5 parts by weight Thereafter, the following monomer mixture was continuously dropped into this reaction system over 20 minutes to complete the polymerization. did. Acrylonitrile 7.0 parts by weight Styrene 17.0 parts by weight Cumene hydroperoxide 0.20 parts by weight Graft polymer latex obtained (conversion rate 96.5)
%) Was coagulated in the same manner as in the above (A-1) to obtain a white powdery graft copolymer (A-2). 0.2 g of acetone-soluble component of this polymer was added to N, N'-dimethylformamide 10
The reduced viscosity at 25 ° C. of the solution dissolved in 0 ml was 0.85 dl / g.

[Production of Graft Copolymer: A-3] In the production of the graft copolymer (A-1), except that the mixture 3 shown in Table 3 was used for the initial preparation,
A graft copolymer (A-3) was obtained. 0.2 g of acetone-soluble component of this polymer was added to N, N'-dimethylformamide 1
The reduced viscosity at 25 ° C. of the solution dissolved in 00 ml was 1.12 dl / g.

[Table 3]

[Production of Graft Copolymer: A-4] In the production of the graft copolymer (A-1), except that the amount of t-dodecyl mercaptan in the initial preparation was changed to 0.5 part by weight, A graft copolymer (A-4) was obtained. 0.2 g of acetone-soluble component of this polymer was added to N, N'-
2 of the solution dissolved in 100 ml of dimethylformamide
The reduced viscosity at 5 ° C. was 0.58 dl / g. [Production of Graft Copolymer: A-5] In the production of the graft copolymer (A-1), the graft copolymer (A-5) was prepared in the same manner except that t-dodecyl mercaptan was not added. Obtained. Acetone soluble matter 0.2 of this polymer
g in 100 ml of N, N'-dimethylformamide has a reduced viscosity of 1.63 dl / g at 25 ° C.
Met.

[Production of copolymer: B-1] The following components were charged into a stainless steel reactor equipped with a stirrer, heated to 80 ° C, and polymerized for 6 hours to obtain a copolymer (B-1). Was. 0.2 g of this polymer is N, N'-dimethylformamide 10
The reduced viscosity at 25 ° C. of the solution dissolved in 0 ml was 1.06 dl / g. Styrene 7.0 parts by weight Acrylonitrile 30 parts by weight Calcium phosphate 1 part by weight Alkyl ester 0.03 parts by weight Lauryl peroxide 0.6 parts by weight t-dodecyl mercaptan 0.20 parts by weight Deionized water 200 parts by weight

[Production of Copolymer: B-2] Copolymer (B
In the production of -1), a copolymer (B-2) was obtained in the same manner except that t-dodecyl mercaptan was changed to 0.5 part by weight. 25 ° C. of a solution of 0.2 g of this polymer dissolved in 100 ml of N, N′-dimethylformamide
Was 0.41 dl / g. [Production of Copolymer: B-3] A copolymer (B-3) was obtained in the same manner as in the production of the copolymer (B-1) except that t-dodecylmercaptan was not added. 0.2 g of this polymer was added to 100 ml of N, N'-dimethylformamide.
The reduced viscosity at 25 ° C. of the solution dissolved in
dl / g.

[Preparation of Acrylic Copolymer: C-1] The following mixture was charged into a reaction vessel equipped with a stirrer, and the inside of the vessel was replaced with nitrogen. The mixture was heated and stirred for hours. Deionized water 280 parts by weight Dioctyl sodium sulfosuccinate 1.5 parts by weight Ammonium persulfate 0.2 parts by weight Methyl methacrylate 30 parts by weight n-octyl mercaptan 0.003 parts by weight Subsequently, the following mixture was added dropwise over 1 hour, and the addition was completed. Thereafter, the mixture was further stirred for 2 hours. 30 parts by weight of methyl methacrylate 20 parts by weight of n-butyl acrylate 0.5 part by weight of n-octyl mercaptan Thereafter, the following mixture was added to the reaction system over 30 minutes, and the mixture was further stirred for 2 hours to complete the three-stage polymerization. The resulting emulsion is salted out using aluminum chloride after cooling,
After filtration, washing and drying, an acrylic copolymer (C-1) was produced. Methyl methacrylate 20 parts by weight n-octyl mercaptan 0.002 parts by weight 0.1% of the C1, C2 and C3 components of the obtained copolymer.
g of a solution of chloroform dissolved in 100 ml of chloroform.
The reduced viscosity at 5.0 ° C. is 5.0, 0.6, 5.0 dl / g.
Met.

[Production of acrylic copolymer: C-2] (C-1) except that the composition of the second stage was changed to 30 parts by weight of styrene, 20 parts by weight of butyl acrylate, and 0.5 parts by weight of n-octyl mercaptan. In the same manner as in (1), an acrylic copolymer (C-2) was obtained. The reduced viscosities of the C1, C2 and C3 components were 5.0, 0.6 and 5.0 dl / g.

Example 1 The obtained graft copolymer (A-1), copolymer (B-1) and acrylic polymer (C-1) were mixed at the ratio shown in Table 4, Further, a mixture obtained by adding 0.3 parts by weight of magnesium stearate and 0.4 parts by weight of ethylene bisstearamide (EBS) was blended by a Henschel mixer, and then, using a T-die extruder, under the following molding conditions, under the conditions of 1000 mm × 80 mm × 0.15m
m (thickness) sheet was formed. T-die extruder: 25φ uniaxial, Thermoplastic Industries Co., Ltd. Cylinder temperature 200 ° C Winding roll temperature 90 ° C Sheet thickness 0.1 to 0.15mm For the obtained sheet, the appearance evaluation of fish eye and surface gloss Was evaluated. About fisheye,
The number of objects having a size of 0.1 mm ² or more was counted. Surface gloss is AS
It was measured according to TM D523. Table 4 shows the evaluation results. [Examples 2 to 6, Comparative Examples 1 to 8] In the same manner as in Example 1, a resin composition having a mixing ratio shown in Table 4 was produced, and a sheet was formed using each resin composition, and evaluated. Was done.

[0030]

[Table 4] As is clear from Table 4, in Examples-1 to 6, fish eyes are small and the surface gloss is high.

[0031]

According to the resin composition of the present invention, a sheet exhibiting excellent mechanical strength and chemical resistance, and particularly having excellent surface appearance such as low fisheye and excellent glossiness is powdered. It can be molded from a wide variety of applications.

Claims (5)

[Claims] 1. A diene rubber-based polymer containing a diene monomer as a main component, 5 to 70% by weight, an aromatic vinyl monomer 60 to 90% by weight and a vinyl cyanide monomer 10 to 10% by weight. 40
And a polymer obtained by graft polymerization of 95 to 30% by weight of a monomer mixture containing 0.1% by weight of
A solution obtained by dissolving 2 g in 100 ml of N, N'-dimethylformamide has a reduced viscosity at 25 ° C of 0.7 to 1.3 d.
a resin composition containing 0.1 to 15 parts by weight of an acrylic copolymer (C) with respect to 100 parts by weight of a resin composition containing 1 / g of the graft copolymer (A). The acrylic copolymer (C) is a (co) polymer obtained by polymerizing a monomer or a monomer mixture containing at least 80% by weight of methyl methacrylate, and 0.1 g of the (co) polymer in 100 ml of chloroform. A (co) polymer (component (C1)) having a reduced viscosity of 2 dl / g or more measured at 25 ° C. in a solution in which the (co) polymer is dissolved, and 10 to 45 parts by weight of the (C1) component Wherein the alkyl group has 1 to 18 carbon atoms and an alkyl methacrylate of 30 to
A copolymer obtained by polymerizing 40 to 70 parts by weight of a monomer mixture containing 70% by weight and 70 to 30% by weight of an alkyl acrylate having 1 to 18 carbon atoms in an alkyl group under the condition that the reduced viscosity is 1 dl / g or less. In the presence of a polymer (component (C2)), a monomer or monomer mixture containing at least 50% by weight of methyl methacrylate (component (C3))
A resin composition for sheet molding, characterized in that the resin composition is an acrylic copolymer obtained by three-stage polymerization of parts by weight under the condition that the reduced viscosity is 2 dl / g or more. 2. The graft copolymer (A) having at least 10% by weight and at least an aromatic vinyl monomer 60
A copolymer of about 90% by weight and 10 to 40% by weight of a vinyl cyanide monomer, and 0.2 g of the copolymer dissolved in 100 ml of N, N'-dimethylformamide.
Resin composition 1 containing 90% by weight or less of a copolymer (B) having a reduced viscosity at 0.7 ° C of 0.7 to 1.5 dl / g.
The sheet-forming resin composition according to claim 1, wherein the acrylic copolymer (C) is added in an amount of 0.1 to 15 parts by weight with respect to 00 parts by weight. 3. The copolymer (B) comprises 60 to 90% by weight of an aromatic vinyl monomer and 1% of a vinyl cyanide monomer.
The resin composition for sheet molding according to claim 2, wherein the copolymer is a copolymer comprising 0 to 40% by weight and 30% by weight or less of another vinyl monomer copolymerizable therewith. 4. The graft copolymer (A) is a diene rubbery polymer containing a diene monomer as a main component.
% To 60% to 90% by weight of an aromatic vinyl monomer,
A graft copolymer obtained by graft polymerization of 95 to 30% by weight of a monomer mixture comprising 10 to 40% by weight of a vinyl cyanide monomer and 20% by weight or less of another vinyl monomer copolymerizable therewith. The polymer according to claim 1, which is a polymer.
4. The resin composition for sheet molding according to any one of items 2 and 3. 5. The component (C3) is a monomer mixture containing at least 50% by weight of methyl methacrylate and 50% by weight or less of a monomer copolymerizable therewith. Item 5. The resin composition for sheet molding according to any one of Items 1 to 4.