JP2000273296A - Fiber-reinforced resin composition and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber-reinforced resin composition that can increase toughness without deterioration of rigidity. SOLUTION: The objective fiber-reinforced resin composition comprises (A) a thermoplastic resin composition including (A-1) an aromatic polyester resin, (A-2) a rubber-containing vinyl cyanide-aromatic vinyl copolymer and (A-3) a vinyl cyanide-aromatic vinyl copolymer, (B) a fibrous reinforcing material and (C) a polycarbonate resin. This composition may includes the fibrous reinforcing material (B) in an amount 1-60 pts.wt. per 100 pts.wt. of the thermoplastic resin composition (A). In addition, this resin composition may include (D) a poly(meth)acrylic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a fiber-reinforced resin composition having excellent rigidity and toughness, a method for producing the same, and a molded article formed from the resin composition.

[0002]

2. Description of the Related Art Polybutylene terephthalate having excellent moldability is reinforced with glass fibers or the like in order to further improve impact resistance and rigidity. Such a resin composition,
It is widely used in various industrial fields as an engineering plastic having excellent mechanical properties and moldability.

JP-A-50-23448 discloses a thermoplastic resin composition comprising polybrene terephthalate, an acrylonitrile-butadiene-styrene copolymer and an acrylonitrile-styrene copolymer, and a short fibrous glass. A glass reinforced resin composition containing a filler is disclosed. This document describes that the use of the resin composition can prevent a molded product from warping.

[0004] As a recent trend, products are being made thinner. For example, when a molded product called a snap fit for fitting parts to each other is manufactured by injection molding, the toughness of the material is not sufficient. The fitting part may be damaged before the fitting. In addition, there is a problem that even a thin product having a thickness of 1 mm or less is broken during transportation of the product due to insufficient toughness.

[0005] In order to solve such problems, for example, a method of reducing the amount of short-fibrous glass filler or adding rubber or an elastomer is generally known. However, in these conventional methods, although the toughness is improved to some extent, the rigidity is reduced, and it is not possible to achieve both toughness and rigidity.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fiber-reinforced resin composition having improved toughness without reducing rigidity, a method for producing the same, and a molded article.

Another object of the present invention is to provide a fiber-reinforced resin composition which can maintain a high level of rigidity and toughness, and has excellent mechanical properties and moldability, a method for producing the same, and a molded article.

Still another object of the present invention is to provide a fiber-reinforced resin composition having excellent moldability capable of improving toughness and suppressing warpage even in a thin molded article having a thickness of 1 mm or less, and a method for producing the same. Another object of the present invention is to provide a molded product.

[0009]

Means for Solving the Problems The present inventor has made intensive studies to solve the above-mentioned problems, and as a result, it has been found that a specific resin is blended with a specific thermoplastic resin composition reinforced with a fibrous reinforcing material. As a result, it has been found that the toughness and impact resistance can be improved without impairing the rigidity, and the present invention has been completed.

That is, the present invention provides (A-1) an aromatic polyester resin, (A-2) a rubber-containing vinyl cyanide-aromatic vinyl copolymer, and (A-3) a vinyl cyanide-aromatic resin. The present invention provides a fiber reinforced resin composition comprising a thermoplastic resin composition (A) containing an aromatic vinyl copolymer and reinforced with a fibrous reinforcing material (B) and containing at least a polycarbonate resin (C). The fiber-reinforced resin composition is a poly (meth)
It may further contain an acrylate resin (D). The aromatic polyester resin (A-1) may be a polybutylene terephthalate resin.

In the method of the present invention, an aromatic polyester resin, a rubber-containing vinyl cyanide-aromatic vinyl copolymer, a vinyl cyanide-aromatic vinyl copolymer, a fibrous filler (B), A fiber-reinforced resin composition is produced by mixing the polycarbonate resin (C). Further, the present invention also includes a molded article formed from the fiber reinforced resin composition.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The fiber reinforced resin composition of the present invention comprises:
(A-1) aromatic polyester resin, (A-2) rubber-containing vinyl cyanide-aromatic vinyl-based copolymer (hereinafter sometimes referred to as (A-2) rubber-containing copolymer) and (A -3) Thermoplastic resin composition (A) containing a vinyl cyanide-aromatic vinyl copolymer (hereinafter sometimes referred to as (A-3) copolymer)
And fibrous reinforcing material (B) and polycarbonate resin (C)
It is composed of

[Thermoplastic resin composition (A)] [(A-1) Aromatic polyester resin] The aromatic polyester resin includes polyalkylene arylate resins such as polyalkylene terephthalate (eg, polyethylene terephthalate). And _C2-4 alkylene terephthalate such as polybutylene terephthalate) and polyalkylene naphthalate (for example, C _2-4 alkylene naphthalate such as polyethylene naphthalate and polybutylene naphthalate).

The polyalkylene arylate resin is a polyalkylene arylate (homopolyester), a polyalkylene arylate resin containing at least 50% by weight, preferably 60 to 98% by weight, more preferably 70 to 98% by weight of alkylene allylate units. It may be a copolyester. Further, it may be a polyester mixture containing at least 50% by weight or more of alkylene arylate units as a whole.

In the copolyester, a portion of the alkylene glycol is an aliphatic alkylene diol (eg,
Aliphatic glycols having about 2 to 10 carbon atoms, such as ethylene glycol, trimethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, neopentyl glycol, hexanediol and octanediol), polyoxy C _{2 -4} alkylene glycol (eg, diethylene glycol), alicyclic diol (eg, 1,4-cyclohexanediol, 1,4
-Cyclohexanedimethanol) or the like. In addition, some of the aryldicarboxylic acids include aromatic dicarboxylic acids (e.g., phthalic acid, isophthalic acid, terephthalic acid, naphthalenecarboxylic acids such as 2,6-naphthalenedicarboxylic acid), and aliphatic dicarboxylic acids (e.g., adipic acid, (A dicarboxylic acid having about 6 to 20 carbon atoms, such as azelaic acid, sebacic acid and dodecanedicarboxylic acid). These components may be used alone or in combination of two or more.

Preferred aromatic polyester resins include:
Polyethylene terephthalate resin, polybutylene terephthalate resin, and polybutylene naphthalate resin are included, and polybutylene terephthalate resin is particularly preferable. These polyester resins can be used alone or in combination of two or more.

The polyester resin may have not only a straight chain but also a branched structure, and may be crosslinked. The polyester resin can be produced by a conventional method, for example, a transesterification reaction or a direct esterification method.

[(A-2) Rubber-containing vinyl cyanide-aromatic vinyl copolymer] As the aromatic vinyl compound of the rubber-containing copolymer, styrene, styrene derivatives [for example,
Alkyl styrenes (for example, vinyl toluenes such as o-, m-, p-methylstyrene and 2,4-dimethylstyrene, alkyl substitution such as ethylstyrene, p-isopropylstyrene, butylstyrene and pt-butylstyrene) Styrenes), α-alkyl-substituted styrene (eg, α-methylstyrene and α-methyl-p-methylstyrene, etc.), halostyrene (eg, o-, m
-And p-chlorostyrene, p-bromostyrene, etc.)]. Preferred aromatic vinyl monomers are styrene, vinyl toluene, α-methylstyrene and the like, and styrene is particularly preferred. These aromatic vinyl monomers can be used alone or in combination of two or more.

Examples of vinyl cyanide include (meth) acrylonitrile. The ratio between the aromatic vinyl monomer and vinyl cyanide is the former / the latter (weight ratio)
= 90/10 to 60/40, preferably 85/15 to 6
It is about 5/35.

As the rubber component, various rubbery polymers (diene rubbers such as butadiene rubber and isoprene rubber, styrene-diene copolymer rubbers such as styrene-butadiene rubber and styrene-isoprene rubber, and the like) Or block copolymer), ethylene-
Examples thereof include vinyl acetate copolymer, acrylic rubber, ethylene-propylene rubber (EPDM), and chlorinated polyethylene. The rubber component may be hydrogenated as necessary. Preferred rubber components are diene rubber components (for example,
Conjugated 1,3-diene rubbers such as butadiene and isoprene or derivatives thereof), particularly butadiene rubbers (diene rubbers such as butadiene rubber). These rubber components can be used alone or in combination of two or more.

[0021] (A-2) In the rubber-containing copolymer,
Content is usually 1 to 60% by weight, preferably 3 to 60% by weight.
50% by weight, more preferably about 10 to 50% by weight
You can choose from a range.

The rubber-containing copolymer (A-2) includes a copolymer of the aromatic vinyl monomer and a monomer copolymerizable therewith. As the copolymerizable monomer, for example,
(Meth) acrylic acid alkyl esters [(meth) acrylic acid C _1-10 alkyl esters such as methyl (meth) acrylate], vinyl ester monomers [vinyl acetate etc.],
Hydroxyl group-containing monomer [hydroxyethyl (meth)
Hydroxy C _1-4 alkyl (meth) acrylate such as acrylate, hydroxypropyl (meth) acrylate, etc.], glycidyl group-containing monomer [glycidyl (meth) acrylate, etc.], carboxyl group-containing monomer [(meth) acrylic acid Α, β-unsaturated carboxylic acids such as maleic anhydride and fumaric acid], and imide monomers (maleimide, N-methylmaleimide, N-phenylmaleimide, etc.). These copolymerizable monomers can be used alone or in combination of two or more. The amount of these copolymerizable monomers used is, for example, from 0 to 30 with respect to the total amount of the polymerizable monomers (aromatic vinyl and vinyl cyanide) constituting the rubber-containing copolymer (A-2). % By weight, preferably 0
It can be selected in the range of about 25% by weight.

The preferred rubber-containing copolymer (A-2) is a graft copolymer obtained by polymerizing styrene and acrylonitrile in the presence of a rubber component [for example, acrylonitrile-butadiene rubber-styrene graft copolymer (AB)
S resin), acrylonitrile-ethylene propylene rubber-styrene graft copolymer (AES resin), acrylonitrile-butadiene rubber-methyl methacrylate-styrene graft copolymer (ABSM resin), acrylonitrile-acryl rubber-styrene graft copolymer ( AA
S resin), ethylene-vinyl acetate-styrene-acrylonitrile graft copolymer, chlorinated polyethylene-styrene-acrylonitrile graft copolymer (ACS resin) and the like]. Particularly preferred (A-2) rubber-containing copolymers include elastic graft copolymers such as ABS resins. These resins can be used alone or in combination of two or more.

(A-2) The rubber-containing copolymer is prepared by a conventional method,
For example, it can be produced by bulk polymerization, suspension polymerization, emulsion polymerization, or the like. [(A-3) Vinyl cyanide-aromatic vinyl copolymer] Examples of the vinyl cyanide-aromatic vinyl copolymer include the aromatic vinyl monomers (particularly styrene) and the vinyl cyanide. (Especially acrylonitrile). Further, the copolymerizable monomers described above (for example,
A copolymer with (meth) acrylate, a carboxyl group-containing monomer, or an imide monomer) may be used.
Preferred (A-3) copolymer is acrylonitrile-
Styrene copolymer (AS resin) and the like can be mentioned. The ratio of the aromatic vinyl monomer and vinyl cyanide is the former /
The latter (weight ratio) = 90/10 to 60/40, preferably 85/15 to 65/35 (for example, 85/15 to 70 /
30) (weight ratio).

(A-3) The copolymer is prepared by a conventional method, for example,
It can be produced by bulk polymerization, suspension polymerization, emulsion polymerization or the like. [Proportion of Each Component of Thermoplastic Resin (A)] In the thermoplastic resin (A), the content of the rubber-containing copolymer (A-2) is set to 100 parts by weight of the aromatic polyester resin (A-1). 5-7
It is about 0 parts by weight, preferably about 10 to 60 parts by weight, and more preferably about 20 to 50 parts by weight (for example, about 20 to 40 parts by weight).

In the thermoplastic resin (A), the content of the copolymer (A-3) is 5 to 80 parts by weight, preferably 10 to 60 parts by weight, based on 100 parts by weight of the aromatic polyester resin. More preferably, 15 to 50 parts by weight (for example, 20 to
４０40 parts by weight).

The content of the aromatic polyester resin (A) is 20 to 90% by weight based on the total amount of the thermoplastic resin (A).
Preferably 20 to 80% by weight, more preferably 30 to 80% by weight.
The content is about 80% by weight, and the balance is composed of (A-2) a rubber-containing copolymer and (A-3) a copolymer. The ratio of the (A-2) rubber-containing copolymer and the (A-3) copolymer is the former / the latter (weight ratio) = 10/90 to 90/10, preferably 20
/ 80-80 / 20, more preferably 30 / 70-7
It is about 0/30.

[Amount of Vinyl Cyanide] In the mixture of the rubber-containing copolymer (A-2) and the copolymer (A-3), the ratio of the aromatic vinyl monomer to the vinyl cyanide is as follows: Former / latter (weight ratio) = 90/10 to 70/30, preferably 90/10
About 75/25 (weight ratio). When the ratio of vinyl cyanide and the aromatic vinyl monomer is out of the above range,
The effect of improving the rigidity and toughness of the resin composition may be insufficient.

[Fibrous reinforcing material (B)] As the fibrous reinforcing material, glass fiber, silica fiber, polycrystalline fiber (for example,
Carbon fiber, alumina fiber, zirconia fiber, asbestos fiber, ceramic fiber, etc.), composite fiber (for example, boron fiber, tungsten fiber, silicon carbide fiber, etc.), metal fiber (for example, metal fiber such as titanium, copper, brass, etc.) ) And organic fibers such as aramid fibers. These fibrous reinforcing materials may be used alone or in combination of two or more. Preferred fibrous reinforcements are inorganic fibers such as glass fibers.

The fibrous reinforcing material is usually used as a short fiber. The average fiber length is, for example, 0.01 to 50.
mm, preferably about 0.1 to 30 mm, and more preferably about 0.5 to 10 mm (for example, about 1 to 5 mm).
The average fiber diameter is, for example, about 0.1 to 50 μm, preferably about 0.5 to 30 μm, and more preferably about 1 to 20 μm (for example, about 2 to 20 μm). The aspect ratio (fiber length / fiber diameter) of the fibrous reinforcing material is not particularly limited as long as the reinforcing effect is exhibited, and for example, 10 or more (for example, 10 to 10).
10,000), preferably 15 or more (for example, 1
5 to 5000).

The surface of the reinforcing material may be treated with a silane-based compound, an epoxy-based compound, an acrylic-based compound, a titanium-based coupling agent or the like, if necessary, in order to improve the adhesion between the resin and the reinforcing material. Good.

The method for producing the fibrous reinforcing material is not particularly limited. For example, in order to obtain glass fibers, it can be carried out by conventional methods, such as, for example, steam or air blow molding and stretch molding, flame blow molding and stretch molding.

The content of the fibrous reinforcing material is not particularly limited as long as the reinforcing effect is exhibited, and the content of the thermoplastic resin (A) 100
The amount is 1 to 60 parts by weight (for example, 1 to 50 parts by weight), preferably 5 to 35 parts by weight, more preferably about 10 to 25 parts by weight with respect to parts by weight. Incidentally, the content of the fibrous reinforcing material, the rubber-containing copolymer and (A-2) in order to not impair the mechanical properties and moldability of the thermoplastic resin composition (A)
(A-3) It is preferable not to exceed the total amount of the copolymer.

[Polycarbonate Resin (C)] The polycarbonate resin (C) includes, in addition to the polycarbonate resin,
Polyester carbonate resins are also included. The polycarbonate resin (C) is usually obtained by a reaction between a dihydroxy compound and phosgene (phosgene method) and a reaction between a dihydroxy compound and a carbonate such as diphenyl carbonate (ester exchange method). The dihydroxy compound may be an alicyclic compound or the like, but is preferably a bisphenol compound.

As the bisphenol compound, bis (4
-Hydroxyphenyl) methane, 1,2,2-bis (4
-Hydroxyphenyl) propane (bisphenol A), 1-bis (4-hydroxyphenyl) propane,
2,2-bis (4-hydroxy-3-methylphenyl)
Bis (hydroxyaryl) C _1-8 alkanes such as propane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) hexane;
Bis (hydroxyaryl) C _4-12 cycloalkanes such as 1,1-bis (4-hydroxyphenyl) cyclohexane; 4,4′-dihydroxydiphenyl ether;
4,4'-dihydroxydiphenyl sulfone; 4,4 '
-Dihydroxydiphenyl sulfide and the like. These bisphenol compounds may be used alone or in combination of two or more.

The preferred polycarbonate resin is an aromatic polycarbonate, particularly a bisphenol-type aromatic polycarbonate (bisphenol A-type aromatic polycarbonate).

The content of the polycarbonate resin is 1 to 40 parts by weight (for example, 1 to 30 parts by weight) based on 100 parts by weight of the total of the thermoplastic resin (A) and the fibrous reinforcing material (B). Preferably 3 to 20 parts by weight, more preferably 5 parts by weight
About 18 parts by weight.

[Poly (meth) acrylic resin (D)] The fiber reinforced resin composition may contain a poly (meth) acrylic resin, if necessary. The poly (meth) acrylic resin is a methyl methacrylate resin containing methyl methacrylate as a main component (about 50 to 100% by weight, preferably about 70 to 100% by weight, and more preferably about 75 to 100% by weight). And polymethyl methacrylate homopolymer, and a copolymer of methyl methacrylate and a copolymerizable monomer. Copolymerizable monomers include, for example, (meth) acrylic acid, alkyl (meth) acrylate [eg, methyl acrylate, ethyl (meth) acrylate,
C _1-12 (meth) acrylates such as butyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate
Alkyl ester, preferably (meth) acrylic acid C
_1-4 alkyl esters, etc.), (meth) acrylic monomers such as (meth) acrylamide, (meth) acrylonitrile, aromatic vinyl monomers such as styrene, carboxyl group-containing monomers [maleic anhydride, fumaric acid Α, β-unsaturated carboxylic acid] and imide monomers (maleimide, N-methylmaleimide, N-phenylmaleimide, etc.). These copolymerizable monomers can be used alone or in combination of two or more.

The poly (meth) acrylic resin can be produced by a conventional method, for example, bulk polymerization, suspension polymerization, emulsion polymerization and the like. The content of poly (meth) acrylic resin is
0 to 30 parts by weight (for example, 0 to 25 parts by weight), preferably 3 to 20 parts by weight, more preferably 5 to 100 parts by weight with respect to 100 parts by weight of the thermoplastic resin (A) and the fibrous reinforcing material (B).
About 18 parts by weight. In addition, the content of the poly (meth) acrylic resin is controlled by (A-2) a rubber-containing copolymer, (A-), so as not to impair the mechanical properties and moldability of the resin composition.
3) It is preferable not to exceed the total amount of the copolymer and (B) the fibrous reinforcing material.

[Polycarbonate resin and poly (meth)
Ratio of acrylic resin] The ratio of the polycarbonate resin to the poly (meth) acrylic resin is the former / the latter (weight ratio) = 20/80 to 100/0 (for example, 20/80 to
95/5), preferably 25/75 to 90/10 (for example, 30/70 to 80/20), more preferably 40.
/ 60 to 60/40. The total amount of the polycarbonate resin and the poly (meth) acrylic resin is 1 to 40 parts by weight, preferably 5 to 35 parts by weight, more preferably 5 to 100 parts by weight based on 100 parts by weight of the thermoplastic resin (A).
About 25 parts by weight.

[Additives] The fiber reinforced resin composition of the present invention comprises:
Other additives may be contained as long as the object of the present invention is not impaired. Other additives include conventional additives such as stabilizers [antioxidants (phenolic antioxidants, phosphorus antioxidants, etc.), ultraviolet absorbers, heat stabilizers, etc.], flame retardants, flame retardants Auxiliaries, lubricants, release agents, antistatic agents,
Examples include fillers (inorganic fillers such as silica, kaolin, talc, titanium oxide, and calcium carbonate), coloring agents, plasticizers, and spreading agents.

[Production Method] The fiber-reinforced resin composition of the present invention comprises an aromatic polyester resin (A-1), a rubber-containing vinyl cyanide-aromatic vinyl copolymer (A-2), and a vinyl cyanide. -Aromatic vinyl copolymer (A-3), fibrous reinforcing material
It can be prepared by mixing (B), the polycarbonate resin (C) and, if necessary, the poly (meth) acrylic resin (D) by a conventional method. For example, it can be prepared by mixing the above components with a mixer, melt-kneading with an extruder, and, if necessary, cooling and pelletizing. As the mixer, a conventional device such as a tumbler or Henschel can be used. Further, a cutter or the like may be used for pelletization.

The fibrous reinforcing material is supplied from a side feeder in the middle of the extruder without being initially compounded with the resin composition (A) and the resin (C) in order to prevent the damage. It is preferred to mix with the resin mixture.

The fiber reinforced resin composition of the present invention not only has high moldability but also can improve mechanical properties, rigidity and toughness. Therefore, the fiber reinforced resin composition of the present invention is useful for obtaining a molded article excellent in rigidity and toughness by a conventional method such as extrusion molding, injection molding, compression molding and the like. In particular,
Since both rigidity and toughness can be achieved at a high level, it is useful for obtaining a thin-walled molded product. For example, even in the case of manufacturing a thin-walled product (for example, a molded product having a thickness of 1 mm or less), it is possible to suppress a warp (low warpage) and obtain a molded product excellent in impact resistance, rigidity, and toughness. Can be.

[0045]

According to the present invention, a resin composition composed of a thermoplastic resin and a fibrous reinforcing material is combined with a polycarbonate resin and, if necessary, a poly (meth) acrylic resin. , Can improve toughness. Furthermore, the thin molded article formed from the fiber reinforced resin composition of the present invention can suppress warpage and maintain mechanical properties at a high level.

[0046]

EXAMPLES The present invention will be described below in more detail with reference to Examples, but the present invention is not limited to these Examples.

(A-1) Aromatic polyester resin used in Examples and Comparative Examples, (A-2) Rubber-containing vinyl cyanide-aromatic vinyl copolymer, (A-3) Vinyl cyanide- The aromatic vinyl copolymer, (B) fibrous reinforcing material, (C) polycarbonate resin and (D) poly (meth) acrylic resin are as follows.

(A-1) Aromatic polyester resin (a-1): polybutylene terephthalate (Duranex 2000, manufactured by Polyplastics Co., Ltd.) (A-2) Rubber-containing vinyl cyanide-aromatic vinyl resin Copolymer (a-2): 60 parts by weight of a monomer mixture composed of 74% by weight of styrene and 26% by weight of acrylonitrile was emulsion-polymerized in the presence of 40 parts by weight of a polybutadiene latex having an average particle diameter of 0.3 μm, and graft copolymerized. A polymer latex was obtained. The obtained graft copolymer latex was coagulated with sulfuric acid, then neutralized with caustic soda, washed, filtered and dried to obtain a powdery graft copolymer (a-2).

(A-3) Vinyl cyanide-aromatic vinyl copolymer (a-3): A mixture of acrylonitrile, styrene, and a solvent (ethylbenzene) is continuously supplied to a polymerization reactor to obtain a mixture of about 120 Polymerization was carried out at a temperature of ° C. Then, unreacted monomers were removed under vacuum to obtain a copolymer (a-3) powder. The acrylonitrile content of the obtained copolymer (a-3) was 23% by weight.

(B) Fibrous reinforcing material (b): Short fibrous glass filler (manufactured by Nippon Electric Glass Co., Ltd.)
(ECS03T) (C) Polycarbonate resin (c): Polycarbonate (manufactured by Teijin Chemicals Limited, Panlite L1225) (D) Poly (meth) acrylic resin (d): Polymethyl methacrylate (Mitsubishi Rayon Co., Ltd.)
Manufactured by Acrypet VH) The toughness and impact resistance of the molded articles obtained in Examples and Comparative Examples were evaluated as follows. [Toughness] Flat thin-walled test piece (127 mm long, 12.7 mm wide)
mm, thickness 1/16 inch) using ASTM D
A bending test was performed according to 790, and the flexural modulus and the amount of strain when the test piece broke (bending breaking strain:%) were measured. The toughness was evaluated based on the magnitude of strain. [Impact resistance] A strip-shaped thin-walled test piece (127 mm long, 1 horizontal)
2.7mm, 1/4 inch thickness)
An Izod impact test was performed according to D256, and impact resistance was evaluated by Izod impact strength. The notch of the test piece was created by cutting after injection molding.

Examples 1 to 7 and Comparative Examples 1 to 8 (a-1) Polybutylene terephthalate and (c) polycarbonate were each dried at 120 ° C. for 3 hours or more.
Using a tumbler, the raw materials at the ratios shown in Tables 1 and 2
(a-1) to (a-3), (c) and (d) are mixed, and this mixture is supplied to a twin-screw extruder to be melt-kneaded, and a cylinder temperature of 25
Pelleted at 0 ° C. Note that (b) the fibrous glass filler was supplied from a side feed in the middle of the extruder, and was melt-kneaded with other raw materials.

The obtained pellets were heated at a cylinder temperature of 25.
Injection molding was performed at 0 ° C. and a mold temperature of 60 ° C., and a test piece for evaluating toughness (127 mm long, 12.7 mm wide, 1/16 inch thick) and a test piece for evaluating impact resistance (127 mm long, 1 mm wide)
(2.7 mm, 1/4 inch thickness) were obtained.

The obtained test pieces were evaluated for toughness and impact resistance. The results are shown in Tables 1 and 2.

[0054]

[Table 1]

[0055]

[Table 2]

When Examples 1 to 7 and Comparative Examples 1 to 8 are compared, the resin compositions of the Examples are superior in toughness and impact resistance to materials having the same elastic modulus.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08L 33/06 C08L 33/06 55/02 55/02 69/00 69/00 // B29K 25:00 69:00 105 : 12 F term (reference) 4F206 AA13E AA21 AA24 AA28 AB25 JA07 4J002 AC032 AC082 BC063 BC072 BG065 BH012 BN072 BN122 BN142 BN152 CF061 CF071 CF081 CG014 CG044 DA016 DA066 DA076 DE096 DE146 DJ006 DJ026 DL146

Claims (12)

[Claims] (A-1) Aromatic polyester resin, (A-
2) a rubber-containing vinyl cyanide-aromatic vinyl copolymer, and a thermoplastic resin composition (A) containing (A-3) a vinyl cyanide-aromatic vinyl copolymer, a fibrous reinforcing material ( B)
And a fiber-reinforced resin composition containing at least a polycarbonate resin (C). 2. The fiber reinforced resin composition according to claim 1, comprising 1 to 60 parts by weight of the fibrous reinforcing material (B) based on 100 parts by weight of the thermoplastic resin composition (A). 3. A poly (meth) acrylic resin (D)
The fiber reinforced resin composition according to claim 1, comprising: 4. The ratio of the polycarbonate resin (C) to the poly (meth) acrylic resin (D) is the former / the latter = 20.
The fiber reinforced resin composition according to claim 3, wherein the ratio is from / 80 to 100/0 (weight ratio). 5. The total amount of the polycarbonate resin (C) and the poly (meth) acrylic resin (D) is based on 100 parts by weight of the total amount of the thermoplastic resin composition (A) and the fibrous reinforcing material (B). The fiber reinforced resin composition according to claim 3, wherein the amount is 1 to 40 parts by weight. 6. A rubber-containing vinyl cyanide-aromatic vinyl copolymer and a vinyl cyanide-aromatic vinyl copolymer, wherein the ratio of the aromatic vinyl monomer to the vinyl cyanide monomer is , The former / latter = 90/10 to 70/30
The fiber reinforced resin composition according to claim 1, which is (weight ratio). 7. A rubber-containing vinyl cyanide-aromatic vinyl copolymer, 5 to 70 parts by weight, and a vinyl cyanide-aromatic vinyl copolymer, 5 to 70 parts by weight, based on 100 parts by weight of the aromatic polyester resin. The fiber reinforced resin composition according to claim 1, comprising 80 parts by weight. 8. The fiber reinforced resin composition according to claim 1, wherein the aromatic polyester resin is a polybutylene terephthalate resin. 9. (A-1) polybutylene terephthalate resin, (A-2) acrylonitrile-butadiene-styrene graft copolymer, (A-3) acrylonitrile-styrene copolymer and (B) short glass fiber reinforcement Composition 1 containing material
(C) aromatic polycarbonate 1 to 100 parts by weight
The fiber reinforced resin composition according to claim 1, comprising 30 parts by weight and 0 to 25 parts by weight of a polymethyl methacrylate resin. 10. The fiber reinforced resin composition according to claim 3, wherein the poly (meth) acrylic resin (D) is a polymethyl methacrylate resin. 11. An aromatic polyester resin, a rubber-containing vinyl cyanide-aromatic vinyl copolymer, a vinyl cyanide-aromatic vinyl copolymer, a fibrous reinforcing material (B) and a polycarbonate resin (C). ), A method for producing a fiber-reinforced resin composition. 12. A molded article obtained by injection molding the fiber reinforced resin composition according to claim 1.