JP3210845B2 - Polybutylene terephthalate resin composition and molded article thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced polybutylene terephthalate resin composition used as a molding material for exterior parts in the fields of automobiles, construction, electric / electronic equipment and other various industries. More specifically, it has excellent weather resistance (light) when exposed to intense light such as sunlight, or the environment such as wind and rain for a long period of time, discolors the surface, lowers gloss, and raises the appearance of inorganic fillers. The present invention relates to a reinforced polybutylene terephthalate resin composition which suppresses a change in appearance due to aging and further has excellent mechanical properties and moldability. Particularly, it is suitably used for automobile exterior parts that require high rigidity and good appearance.

[0002]

2. Description of the Related Art Thermoplastic polyester resins such as polyalkylene terephthalate resins have mechanical properties, electrical properties, and other physical properties.
Because of its excellent chemical properties and good workability, it is used as a engineering plastic in a wide range of applications such as automobiles, electric and electronic parts. Such a thermoplastic polyester resin is used alone in various molded articles, but depending on the field of use, various reinforcing agents and additives are blended for the purpose of improving its properties, particularly mechanical properties. I have been. In fields requiring high mechanical strength and rigidity, it is well known to use a fibrous reinforcing agent represented by glass fiber, carbon fiber and the like. One of the characteristics of polybutylene terephthalate resin is good weather (light) resistance, which is used for interior and exterior parts of automobiles. However, a thermoplastic polyester resin containing an inorganic filler such as a fibrous reinforcing agent has high mechanical strength, rigidity, etc., but has a long period of sunlight, moisture (rain,
When exposed to an atmosphere such as dew condensation, or other atmospheric contact, the inorganic filler emerges on the surface as the resin deteriorates,
As a result, discoloration and surface smoothness of the molding surface may be lost, gloss may be reduced, and appearance may be impaired. As a method of solving this problem, conventionally, a means such as using a fine powder filler such as talc or a plate-like filler such as mica / glass flake together with a fibrous reinforcing agent to make the surface embossing less noticeable has been proposed. Have been. However, with these methods, sufficient mechanical strength and rigidity cannot be obtained, and the surface appearance cannot be sufficiently maintained. In addition, when a large amount of inorganic filler is added, this phenomenon appears remarkably. Therefore, development of a material having high mechanical strength and rigidity and good weather (light) resistance has been desired.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present inventors have developed a high-strength, rigid polybutylene terephthalate resin molded article to which an inorganic filler has been added, which has been exposed to an atmosphere such as sunlight for a long period of time. After that, intensive studies were conducted to obtain a material capable of maintaining an excellent surface appearance. As a result, a polybutylene terephthalate resin is preferably used in combination with an aromatic polycarbonate resin or a polyethylene terephthalate resin, and as a binder with the resin, an inorganic filler converged mainly with an acrylic compound is added, whereby a large amount of inorganic filler is added. It has been found that a molded product having a very good surface appearance and excellent mechanical strength and moldability can be obtained even if added to the composition or exposed to sunlight for a long time. Reached. That is, for the present invention is (A) polybutylene terephthalate resin 100-55 wt% (B) an aromatic polycarbonate resin or a polyethylene terephthalate resin 0-45% by weight of the resin component 100 parts by weight consisting of, (C) silane
Surface treated with compound, and inorganic filler as sizing agent
Treated with 0.05 to 5% by weight of acrylic compound
A reinforced polybutylene terephthalate resin composition comprising 3 to 200 parts by weight of an inorganic filler and 0.01 to 10 parts by weight of a coloring component (D).

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the components of the resin material of the present invention will be described in detail. First, the base resin (A) polybutylene terephthalate resin of the resin material of the present invention is a polymer obtained by polycondensing 1,4-butanediol and terephthalic acid or a lower alcohol ester thereof, and is a polybutylene resin. A copolymer containing at least 70% by weight of terephthalate may be used. The monomers to be copolymerized include aliphatic and aromatic polyisomers such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid, and succinic acid as dibasic acid components other than terephthalic acid or its lower alcohol ester. A basic acid or an ester-forming derivative thereof, an aromatic hydroxycarboxylic acid such as hydroxybenzoic acid and hydroxynaphthoic acid or an ester-forming derivative thereof, and the like, as a glycol component other than 1,4-butanediol, Alkylene glycols such as ethylene glycol, diethylene glycol, propylene glycol, trimethylene glycol,
Hexamethylene glycol, neopentyl glycol,
Lower alkylene glycols such as 1,3-octanediol, bisphenol A, such as cyclohexanedimethanol,
Aromatic alcohols such as 4,4'-dihydroxybiphenyl,
Bisphenol A ethylene oxide 2 mol adduct,
Alkylene oxide adducts such as 3-mol adduct of bisphenol A with propylene oxide; alcohols; polyhydroxy compounds such as glycerin and pentaerythritol; and ester-forming derivatives thereof. In the present invention, any of polybutylene terephthalate produced by polycondensation using the above compound as a monomer component can be used as the component (A) of the present invention.
Although a mixture of more than one kind is used, polybutylene terephthalate is preferably used. Further, a branched polymer belonging to a copolymer can also be used. PBT here
The branched polymer is a polyester mainly composed of a so-called polybutylene terephthalate or a butylene terephthalate monomer, and branched by adding a polyfunctional compound. Examples of the polyfunctional compound that can be used here include trimesic acid, trimellitic acid, pyromellitic acid and their alcohol esters, glycerin, trimethylolethane, trimethylolpropane, and pentaerythritol.

[0005] In the present invention, (A) a polybutylene terephthalate resin is preferably blended with (B) an aromatic polycarbonate resin or a polyethylene terephthalate resin. The presence of the aromatic polycarbonate or polyethylene terephthalate resin has the effect of improving the surface appearance of the molded article, and particularly when the inorganic filler is added in a large amount, to improve the gloss and appearance of the molded article surface. It is valid.

The polycarbonate resin used for this purpose is prepared by a solvent method, that is, a reaction between a dihydric phenol and a carbonate precursor such as phosgene in a solvent such as methylene chloride in the presence of a known acid acceptor and a molecular weight modifier. Alternatively, it can be produced by a transesterification reaction between a dihydric phenol and a carbonate precursor such as diphenyl carbonate. Here, bisphenols are preferably used as the dihydric phenol, and 2,2-bis (4-hydroxyphenyl) propane, that is, bisphenol A is particularly preferable. Further, bisphenol A may be obtained by partially or entirely substituting another dihydric phenol. Examples of dihydric phenols other than bisphenol A include hydroquinone, 4,4-dihydroxydiphenyl, bis (4-hydroxyphenyl) alkane, bis (4-hydroxyphenyl) cycloalkane, bis (4-hydroxyphenyl) sulfide, bis ( Examples include compounds such as 4-hydroxyphenyl) ether and halogenated bisphenols such as bis (3,5-dibromo-4-hydroxyphenyl) propane and bis (3,5-dichloro-4-hydroxyphenyl) propane. be able to. These dihydric phenols may be homopolymers or copolymers of two or more dihydric phenols. Further, the polycarbonate resin used in the present invention may be a thermoplastic random branched polycarbonate obtained by reacting a polyfunctional aromatic compound with a dihydric phenol and / or a carbonate precursor. The polycarbonate used in the present invention is particularly preferably one having high fluidity.

The polyethylene terephthalate resin used in the present invention is a polymer obtained by a polycondensation reaction between terephthalic acid or an ester-forming derivative thereof and an alkylene glycol having 2 carbon atoms or an ester-forming derivative thereof. May be contained in an amount of 70% by weight or more. The monomers to be copolymerized include aliphatic and aromatic polyisomers such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid, trimellitic acid, and succinic acid as dibasic acid components other than terephthalic acid or its lower alcohol ester. A basic acid, or an ester-forming derivative thereof, hydroxybenzoic acid, an aromatic hydroxycarboxylic acid such as hydroxynaphthoic acid or an ester-forming derivative thereof, and the like, as a glycol component other than ethylene glycol, a normal alkylene glycol such as diethylene glycol, Propylene glycol, trimethylene glycol, hexamethylene glycol, neopentyl glycol, cyclohexane dimethanol, etc., lower alkylene glycols such as 1,3-octanediol, and ethylene oxide of bisphenol A Adduct, bisphenol A propylene oxide 3
Alkylene oxide adducts such as molar adducts, alcohols, polyhydroxy compounds such as glycerin and pentaerythritol, and ester-forming derivatives thereof, and the like can be mentioned. When the polyethylene terephthalate resin used in the present invention is preferably an unmodified polyethylene terephthalate or an isophthalic acid-modified polyethylene terephthalate copolymer, the effects of the present invention are remarkable.

[0008] Any of the polycarbonate resin and the polyethylene terephthalate resin (B) used here may be used, and can be used properly according to other characteristics. For example, when sink and warp are conspicuous, a polycarbonate resin is preferable, and when hydrolysis resistance and rigidity are required, a polyethylene terephthalate resin is preferable. Both resins have a similar effect in improving the initial appearance of polybutylene terephthalate resin reinforced with filler. In addition, (B) the addition amount of the polycarbonate resin or polyethylene terephthalate resin is (A), (B)
0 to 45% by weight, preferably 5 to 40% by weight, based on the total of If the addition amount exceeds 45% by weight, the molding cycle property,
Poor releasability and necessity of high mold temperature arise, making it impractical.

Next, the inorganic filler of the component (C) used in the present invention has been preliminarily treated with an acrylic compound. As the acrylic compound, acrylic acid, acrylic acid ester (for example, methyl acrylate,
Homopolymers or copolymers such as ethyl acrylate), methacrylic acid and methacrylates (eg, methyl methacrylate, ethyl methacrylate, etc.), or copolymers of these components with styrene, acrylonitrile, butadiene, isoprene, etc. It is. Among them, methyl methacrylate homopolymer or methacrylic acid ester containing the same as a main component (other than methyl methacrylate),
A copolymer containing styrene, acrylonitrile, or the like is preferably used.

(C) As the inorganic filler surface-treated mainly with an acrylic compound, a fibrous, powdery or plate-like filler is used depending on the purpose, but high mechanical strength and rigidity are required. To obtain it, fibrous fillers are preferably used. Examples of the fibrous filler include glass fiber, asbestos fiber, carbon fiber, silica fiber, silica / alumina fiber, zirconia fiber, potassium titanate fiber, boron nitride fiber, and metals such as stainless steel, aluminum, titanium, copper, and brass. Inorganic fibrous materials such as fibrous materials can be mentioned. Particularly typical fibrous fillers are glass fibers or carbon fibers. Particularly preferably, glass fibers are used. On the other hand, silica, quartz powder, glass beads, milled glass fiber, calcium silicate, aluminum silicate, kaolin, talc, clay, diatomaceous earth,
Silicates such as wollastonite, iron oxide, titanium oxide,
Metal oxides such as zinc oxide and alumina; carbonates of metals such as calcium carbonate and magnesium carbonate; sulfates of metals such as calcium sulfate and barium sulfate; and other metal powders such as silicon carbide, silicon nitride, boron nitride. .
Examples of the plate-like filler include mica, glass flake, various metal foils, and the like. Among these, glass flake, mica powder, talc, glass beads, and milled glass fiber are preferred as the non-fibrous inorganic filler. These fillers (C) can be used alone or in combination of two or more. The combined use of a fibrous filler, particularly a glass fiber and a powdery and / or plate-like filler, is a preferable combination in particular because it has both mechanical strength, dimensional accuracy, electrical properties and the like. Particularly preferred is glass fiber alone surface-treated with an acrylic compound or mica surface-treated with glass fiber and an acrylic compound. Although the fiber length of the glass fiber is not particularly limited, a chopped strand of 1 to 5 mm can be preferably used.

There is no particular limitation on the method of surface-treating the glass fiber or the like with an acrylic compound, but it is preferable to use a silane coupling agent such as aminosilane, epoxy silane, vinyl silane, or alkoxy silane when sizing the glass fiber or the like. Preferably, a method in which an acrylic compound is used as part or all of a sizing agent such as glass fiber is used. Also, a method of adding a small amount of a urethane-based compound together with the acrylic compound is effective in improving convergence. Further, a method in which an amine-based or acid anhydride curing agent is used in combination is also preferable. As a silane coupling agent,
Aminosilanes such as γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl) aminopropyldimethoxysilane, N-β- (N-vinylbenzylaminoethyl) -γ-aminopropyltrimethoxysilane And epoxysilanes such as γ-glycidoxypropyltrimethoxysilane are preferably used. Particularly preferably, the above-mentioned aminosilanes are used.

The amount of the inorganic filler (C) used in the present invention is 3 to 200 parts by weight, preferably 20 to 150 parts by weight, particularly preferably 70 to 100 parts by weight, per 100 parts by weight of the resin component.
It is up to 150 parts by weight. When the filler is added in an amount of 70 parts by weight or more, a change in surface appearance due to weather (light) resistance of a molded article made of the composition of the present invention has a remarkable effect. If the amount is too small, the effect of using a filler surface-treated with an acrylic compound is difficult to see, and if it is too large, the work by extrusion becomes difficult. In addition, the amount of the acrylic compound used is 0.01 to
It is 10% by weight, preferably 0.05 to 5% by weight.

The present invention relates to a polybutylene terephthalate resin
A composition obtained by adding (C) an inorganic filler surface-treated with an acrylic compound to a system in which an aromatic polycarbonate resin or a polyethylene terephthalate resin (B) is added in combination, if necessary. Molded products have high strength and rigidity, and even when exposed to sunlight or wind and rain for a long period of time, the filler is not significantly raised on the surface and causes a deterioration in appearance, and good weather resistance is maintained. . The acrylic compound used as a sizing agent has an effect as a binder between the polyester resin and the inorganic filler, so that strength and rigidity can be obtained, adhesion to the filler is high, and the filler emerges. It is difficult to generate radicals and the like due to light and heat, so that it is considered that the polyester resin has an effect of suppressing decomposition of the polyester resin.

On the other hand, an epoxy resin having the highest binder effect of a polyester resin has higher strength and rigidity than an acrylic compound. Therefore, although it is generally used, it is decomposed by light and heat to generate radicals. Greatly accelerates the decomposition of polyester resin. As a result, discoloration of the surface of the molded article and embossment of the filler are increased. In addition, urethane resin-based and vinyl acetate-based sizing agents have a low binder effect with the polyester resin, do not provide sufficient strength and rigidity, and have low adhesion with the filler, so that the filler is likely to emerge. .

Further, by adding and blending the colorant (D) to the composition of the present invention, a colored molded article which does not require a plating layer or a coating layer can be obtained. There are no particular restrictions on the types of dyes and pigments used here, and any type can be selected from those conventionally used in polybutylene terephthalate compositions. Among them, carbon black is particularly preferred, and azo, phthalocyanine, perylene, quinacridone,
Anthraquinone type is preferred. In the present invention, the amount of the coloring component is 0.01 to 100 parts by weight of the resin component.
-10 parts by weight, preferably 0.05-4 parts by weight. If the amount is less than 0.1 part by weight, the coloring effect is not sufficiently exhibited, and if the amount is more than 10 parts by weight, the mechanical strength is reduced, and a mold is contaminated during molding.

Further, by adding (E) an antioxidant to the composition of the present invention, the obtained molded article exhibits higher thermal stability, especially long-term thermal stability and mechanical properties.
As the antioxidant, hindered phenol-based, amine-based, phosphorus-based, thioether-based compounds and the like can be used.
One example of a hindered phenol compound is 1,6-
Hexanediol bis [3- (3,5-di-t-butyl-
4-hydroxyphenyl) propionate], pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], triethylene glycol bis [3- (3-t-butyl-5-methyl) -4-hydroxyphenyl) propionate]. As an example of an amine compound, N-phenyl-
N'-isopropyl-p-phenylenediamine, N, N'-
Diphenyl-p-phenylenediamine, 4,4'-bis-
(4-α, α-dimethylbenzyl) diphenylamine,
Condensation products of diphenylamine and acetone; N-phenylnaphthylamine; N, N′-di-β-naphthylphenylenediamine; As the phosphorus compound, a phosphite or phosphite organic compound is preferable. For example, triallyl phosphite such as triphenyl phosphite and tri (nonylphenyl) phosphite, distearyl pentaerythritol diphosphite, cyclic Neopentanetetrayl-bis-
(2,4-di-t-butylphenyl-phosphite),
Heat-resistant phosphites such as di- (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite; tetrakis (2,4-di-t-butylphenyl) -4,4-biphenylene Phosphonite compounds such as phosphonite are typical examples. Examples of the thioether compound include dilauryl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, lauryl stearyl thiodipropionate, tetrakis [methylene-3- (dodecylthio) propionate] methane, dialkyl ( C ₁₂ ~
_C18 ) -3,3-thiodipropionate.
Preferably, one or more of a hindered phenol compound and a phosphorus compound are used in combination. Particularly preferably, pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], triethylene glycol bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) ) Propionate] and di- (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite;
Tetrakis (2,4-di-t-butylphenyl) -4,4-
It is a combination of one kind of biphenylenephosphonite or a hindered phenol compound and a phosphorus compound. In particular, when a phosphorus-based stabilizer is used in combination with (A) polybutylene terephthalate resin and (B) polycarbonate resin or polyethylene terephthalate resin, the effect of suppressing transesterification is high, and the resulting composition has higher thermal stability. The amount of antioxidant used here is 100
0.01 to 5 parts by weight with respect to parts by weight, preferably 0.05 to 5 parts by weight.
3 parts by weight.

Further, in the composition of the present invention, a known substance generally added to a thermoplastic resin or the like can be further added and used in order to impart desired properties according to the purpose. For example, a crystal nucleating agent, an ultraviolet absorber, a stabilizer such as a light stabilizer, an antistatic agent, a lubricant, a release agent, a lubricant, a plasticizer, and the like can be blended. Among them, the nucleating agent is (A)
When a polybutylene terephthalate resin and (B) a polycarbonate resin or a polyethylene terephthalate resin are used in combination, it is preferable to add them in order to improve moldability and mold cycleability. The amount of the crystal nucleating agent used is 0.001 to 5 parts by weight, preferably 0.002 to 3 parts by weight, per 100 parts by weight of the resin component. If the amount is less than 0.001 part by weight, the effect of increasing the crystallization rate is not sufficient. As the crystal nucleating agent, any of an organic substance and an inorganic substance can be used. Particularly preferred is boron nitride.

Further, other thermoplastic resins (for example, polyethylene, polypropylene, acrylic resin, fluororesin, polyamide, polyacetal, polysulfone, polyphenylene oxide, etc.) and thermosetting resins as long as the object of the present invention is not impaired as a resin component. (Eg, phenolic resin, melamine resin, polyester resin, silicone resin, epoxy resin, etc.) and soft thermoplastic resin (eg, ethylene / ethyl acrylate, ethylene / vinyl acetate copolymer, polyester elastomer, etc.). These resins may be used alone or in combination of two or more.

The composition of the present invention can be easily prepared by equipment and methods generally used as conventional resin composition preparation methods. For example, after mixing the respective components, a pellet is prepared by kneading and extruding with a single-screw or twin-screw extruder, and then a method of molding, once pellets having a different composition are prepared, and the pellets are mixed in a predetermined amount. Any method such as a method of providing a molded article having a desired composition after molding and a method of directly charging one or more of each component to a molding machine can be used. Also,
Mixing and adding a part of the resin component as a fine powder with the other components is a preferable method for uniformly blending these components. As a molding method for filling a resin into a mold, there are an injection molding method, an extrusion compression molding method, and the like, and an injection molding method is generally used.

[0020]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.
In addition, the measuring method of the physical property evaluation shown in the following examples is as follows. The tensile strength was measured in accordance with ASTM D-638 (test piece ASTM type: thickness 3 mm).

Flexural modulus The flexural modulus was measured according to ASTM D-790. The appearance was measured by the following method. Weather Resistance Test A weather resistance test was performed by the following two methods to evaluate a change in gloss and a change in surface state. Test A method) Weather meter (WGA manufactured by Suga Test Instruments Co., Ltd.)
-SUN-HCH type) and irradiated with ultraviolet rays at 63 ° C. under the weather (with rain spray). Test B method) Long-term sunlight exposure was carried out by an outdoor exposure test (the roof of our building in Fuji City, Shizuoka Prefecture). (A) Surface gloss Test piece (70mm x 40mm x 3mm thickness) molded under the following conditions
45 degrees with a digital variable-angle gloss meter (UGV-40 manufactured by Suga Test Instruments Co., Ltd.) in accordance with JIS K 7105 gloss measurement.
The gloss at 45 degree reflection was measured. Molding machine IS80 manufactured by Toshiba Corporation Molding conditions Nozzle C1 C2 C3 Cylinder temperature (° C) 260 250 240 220 Injection pressure 750 kg / cm ² Injection speed 2.0 m / min Mold temperature 90 ° C (b) Surface appearance Was visually observed, and the following points were given. 1; no filler floating on the surface and almost no discoloration (ΔE <3) 2; no filler floating on the surface but some discoloration (3 <ΔE <6) 3; on the surface There is no floating of the filler, but the discoloration is large (6 <ΔE <9) 4; The floating of the filler is seen on the surface, and the discoloration is also seen (3 <
ΔE <9) 5; Intense floating of filler on surface and discoloration are also observed (ΔE <9) Discoloration level: ΔE is a colorimetric colorimeter (Nippon Denshoku Industries Co., Ltd.)
, Z-300A) to measure the color difference from the untested test piece.

Example 1 A glass fiber (3 mm long chopped strand) condensed with an acrylic resin after 50 parts by weight of (C-1) aminosilane was added to 100 parts by weight of (A) polybutylene terephthalate resin (A). And (D) 5 parts by weight of carbon black, and various evaluations were carried out. Comparative Examples 1 and 2 A case where glass fibers converged with a novolak type epoxy resin were used instead of (C-1) used in Example 1 was used as Comparative Example 1, and a case where a glass fiber converged with a bisphenol A type epoxy resin was used. The case where the used glass fiber is used is shown as Comparative Example 2. Examples 2 to 4 Various evaluations were performed in the same manner as in Example 1 except that a resin component consisting of (A) 65% by weight of polybutylene terephthalate resin and (B) 35% by weight of polycarbonate resin was used (Example 2). . Examples 3 and 4 show examples in which the resin composition was changed as shown in Table 1. Example 5-6 Example 4 above acrylic converging glass fibers in place of (C-1), mica converged glass fiber (C-1) and the surface at the acrylic resin after the aminosilane treatment (C-2) Example 5 shows the case where both are used. Further, mica (C) was used instead of the acrylic converged glass fiber (C-1) of Example 4.
The case of using the -2) shown in the sixth embodiment. Comparative Examples 3 and 4 Compared to Examples 2 and 4, the case where glass fibers converged with the bisphenol A type epoxy resin used in Comparative Example 2 were used instead of the glass fibers (C-1) was used. As shown. Comparative Example 5 Comparative Example 5 shows a case in which, instead of mica (C-2), mica that had condensed with urethane after treating with aminosilane was used instead of mica (C-2). Example 7 Example 7 shows a case where the addition amount of the glass fiber (C-1) in Example 4 was changed to 100 parts by weight. Comparative Example 6 Comparative Example 2 was applied to Example 7 in place of glass fiber (C-1).
Comparative Example 6 shows the case where the glass fibers converged by the bisphenol A type epoxy resin used in Example 1 were used.

[0023] Examples 8 In ~ 12 Example 7, implementing the example using the polyethylene terephthalate resin in place of the polycarbonate resin Example 8
As shown. Similarly, in Examples 2, 4, 5, and 6,
Examples in which a polyethylene terephthalate resin is used instead of the polycarbonate resin are shown in Examples 9 , 10 , 11 , and 12 . Examples 13 to 14 In Example 1, an example in which 2 parts by weight of a quinacridone-based red pigment was used instead of carbon black (D-1) was used as an example 13, and a gray pigment (iron oxide / titanium oxide / carbon black-based) was used. An example using 2 parts by weight) is shown as Example 14 . Comparative Examples 7 to 9 Compared to Examples 8 to 10 , the cases where the glass fibers used in Comparative Example 2 were used are shown as Comparative Examples 7 to 9. Comparative Example 10 In comparison with Example 12 , the case where the mica used in Comparative Example 5 was used is shown as Comparative Example 10. Comparative Examples 11 and 12 In comparison with Examples 13 and 14 , the cases where the glass fibers used in Comparative Example 2 were used are shown as Comparative Examples 11 and 12. Tables 1 to 4 show these results.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

[0028]

As described above, the polybutylene terephthalate resin composition of the present invention is obtained by blending a polybutylene terephthalate resin of a specific composition with a polycarbonate resin or a polyethylene terephthalate resin, and further converging inorganic filler with an acrylic compound as a binder. By adding an agent and further a coloring component, it has high mechanical strength and rigidity, has good moldability, and shows an excellent appearance of a molded article. Furthermore, even if the molded article is exposed to sunlight, wind and rain for a long period of time, the filler does not rise out, and an excellent appearance (molded article surface) can be maintained. The molded article obtained from this composition is required to have particularly high strength and good appearance, and is applied to exterior parts such as automobiles / electric machines and building materials that require weather (light) resistance.

Claims (5)

(57) [Claims] (1) Polybutylene terephthalate resin (A) 100
Relative to 55 wt% (B) an aromatic polycarbonate resin or a polyethylene terephthalate resin 0-45% by weight of the resin component 100 parts by weight consisting of surface-treated with (C) a silane compound, and further sizing agent
0.05 to 5% by weight of acrylic compound based on inorganic filler
A reinforced polybutylene terephthalate resin composition comprising 3 to 200 parts by weight of an inorganic filler treated with a product and (D) 0.01 to 10 parts by weight of a coloring component. (2) An aromatic polycarbonate resin or polyethylene terephthalate resin (B) of 15 to 40 as a resin component.
The polybutylene terephthalate resin composition according to claim 1, which is blended by weight. (C) whether the inorganic filler is glass fiber or mica;
3. The method according to claim 1, wherein one or two selected from the above are used in combination.
Polybutylene terephthalate resin composition of the mounting. 4. The color component (D) is carbon black, for resin.
The pigment according to any one of claims 1 to 3, wherein the pigment is at least one selected from the group consisting of:
The polybutylene terephthalate resin composition according to claim 1. 5. The polybuty according to claim 1, wherein
For weather resistance obtained by molding a lenterephthalate resin composition
Excellent molded product.