JPH06329899A - Resin composition having solvent resistance and weather resistance - Google Patents

Abstract

PURPOSE:To obtain the subject composition useful for electric/electronic parts, etc., having excellent appearance of molding therefrom, mechanical properties, heat resistance and oil resistance, comprising a polyphenylene ether, nylon, etc., a compatibilizing agent, an impact resistance improver and specific titanium oxide in a specific ratio. CONSTITUTION:The objective composition comprises (A) 20-80wt.% of a polyphenylene ether such as (2,6-dimethyl-1,4-phenylene) ether polymer, (B) 20-80 pts.wt. of one or more polymers selected from nylon, polyester and polycarbonate, (C) 0.1-20 pts.wt. of a compatibilizing agent such as fumaric acid, (D) 0-30 pts.wt. of an impact resistance improver such as styrene.butadiene block copolymer and (E) 0.1-30 pts.wt. total of finely-divided particles of titanium oxide having <=0.06mum average particle diameter and/or finely divided particles of zinc oxide having <=0.06mum average particle diameter. The component E is preferably treated with a surface treating agent such as titanate-based coupling agent.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The resin composition of the present invention is particularly suitable for solvent resistance and oil resistance, as well as wind and rain and sunlight when used outdoors for a long time without impairing the appearance, mechanical properties and heat resistance of molded articles. , When exposed to sunlight through windows during indoor use, light from fluorescent lamps, etc., the discoloration and fading of the surface of molded products is extremely small, and solvent resistance that does not cause problems such as mold deposits during molding and solvent resistance A weather resistant resin composition, which can be used in a wide range of fields such as electric / electronic parts, automobile parts, machine parts, and sundries.

[0002]

2. Description of the Related Art Conventionally, a composition comprising one or more resins selected from polyphenylene ether (hereinafter abbreviated as PPE), nylon, polyester-based polymer and polycarbonate (hereinafter abbreviated as PC) has electrical properties and mechanical properties. Since it has excellent properties, heat resistance, solvent resistance, oil resistance, and moldability, it is used in the fields of electric / electronic parts, automobile parts, machine parts, and sundries. However,
PPE-based polymers generally have poor weather resistance, and compositions comprising PPE and nylon, polyester-based polymers and one or more resins selected from PC are no exception. However, when it is exposed to sunlight through windows during indoor use, light from fluorescent lamps, etc., it causes a problem that the discoloration and fading of the surface of the molded product is extremely large, and its use is very limited. Therefore, it has been strongly desired to prevent discoloration and fading of the surface of a molded article from a composition comprising PPE, a nylon polyester polymer and one or more resins selected from PC when exposed to such various lights. .

JP-A-60-168756 discloses that orthohydroxy-substituted alkoxybenzophenones and tetraalkyldipipedinyl aliphatic diesters are PP.
It is disclosed that addition to E can prevent the occurrence of discoloration and fading on the surface of the molded product. However, when an organic low molecular weight compound such as orthohydroxy-substituted alkoxybenzophenones or tetraalkyldipipedinyl aliphatic diesters is added to PPE, the organic low molecular weight compound is volatilized during melt kneading or molding, resulting in The effect of fading is reduced, and the organic low-molecular weight compound adheres to the surface of the molded product to cause poor appearance, the gas vent of the mold is clogged, and the organic low-molecular weight compound adheres to the ejector pin, etc.
It was difficult to continuously mold good products, and the problem of discoloration and fading could not be completely solved.

The present inventors have applied the method disclosed in JP-A-60-168756 to a composition containing PPE and at least one resin selected from nylon, polyester polymers and PC as a main component. Although it was applied, the organic low molecular weight compound adhered to the mold, and the problem of discoloration and fading could not be completely solved.

Japanese Unexamined Patent Publication No. 61-62545 discloses PPE.
Discloses a method of adding zinc oxide and a nickel-based complex. In this case, it is said that the particle size of zinc oxide is preferably around 0.25 μm, but the particle size is 0.25.
Even if the discoloration of the PPE resin can be prevented to some extent by adding zinc oxide of about μm, a molded article made of a composition containing PPE and at least one resin selected from nylon, polyester polymer and PC as a main component When it was exposed to various kinds of light for a long time, discoloration and fading became great, which was not yet satisfactory.

Japanese Patent Publication No. 57-502062 discloses that the impact resistance is improved by adding titanium oxide having a particle size of about 0.1 to 0.2 μm and an impact resistance improver to PPE. Has been done. Although this method certainly improves the impact resistance to some extent, it can improve the weather resistance of a molded product from a composition containing PPE and at least one resin selected from nylon, polyester-based polymers and PC as the main component. The degree of improvement was very low.

[0007]

The problem to be solved by the present invention is not only excellent in solvent resistance and oil resistance, but also wind and rain and sunlight when used outdoors for a long time,
When it is exposed to sunlight through windows during indoor use, light from fluorescent lamps, etc., the discoloration and fading of the surface of the molded product is extremely small, the molded product's appearance, mechanical properties, heat resistance are good, (EN) It is intended to provide a weather resistant resin composition which is free from clogging of a gas vent of a mold and from sticking to a protruding pin or the like. Such a composition can be used for parts that may come into contact with solvents and fats and oils and are irradiated with various kinds of light in the fields of electric / electronic parts, automobile parts, machine parts, sundries and the like.

[0008]

Means for Solving the Problems As a result of various studies for solving the above problems, the present inventors have found that (A) PPE (B) one or more polymers selected from nylon, polyester and PC, ( The present invention was completed by finding a resin composition obtained by adding fine particle titanium oxide and / or fine particle zinc oxide to a composition comprising C) a compatibilizer and (D) an impact modifier, and melt-kneading. Let

That is, the present invention relates to (A) PPE 20-
80 parts by weight, (B) nylon, polyester and PC
20 to 80 parts by weight of one or more polymers selected from
(C) compatibilizer 0.01 to 20 parts by weight, (D) impact modifier 0 to 30 parts by weight, and (E) average particle size of 0.06 μm.
A resin composition comprising the following particulate titanium oxide and / or a total of 0.1 to 30 parts by weight of particulate zinc oxide having an average particle diameter of 0.06 μm or less.

The PPE used in the present invention can be produced, for example, according to the method described in JP-A-63-286464. In particular, poly (2,6-dimethyl-1,4
-Phenylene) ether, 2,6-dimethyl-1,4-
A phenol / 2,3,6-trimethyl-1,4-phenol copolymer and a graft copolymer obtained by graft-polymerizing styrene to the former two are used in the present invention.
Preferred as E. The intrinsic viscosity of PPE suitable for the present invention was measured with a chloroform solution at 25 ° C. and was 0.60 to 0.35.
It is preferably in the range of dl / g. Intrinsic viscosity is 0.6
If it is higher than 0 dl / g, the melt viscosity of the composition will be high, and the bar flow value will decrease, making it particularly difficult to mold a large-sized thin-walled molded product. On the other hand, when the intrinsic viscosity is lower than 0.35 dl / g, the mechanical strength is largely reduced and the value as a practical molded product is impaired, so that it cannot be used in the resin composition of the present invention.

Nylon used in the present invention is nylon 6, nylon 6,9, nylon 6,10, nylon 6,
1 type selected from aliphatic nylon such as 12, nylon 11, nylon 12, nylon 4, 6 and aromatic nylon such as polyhexadiamine terephthalamide, polyhexadiamine isophthalamide, polymetaxylene diamine adipic amide The above nylons can be preferably used.

The polyester used in the present invention is selected from aliphatic polyester, aromatic polyester and wholly aromatic polyester, but polybutylene terephthalate (hereinafter abbreviated as PBT) and polyethylene terephthalate (hereinafter referred to as PET) are particularly preferable. (Abbreviation).

The PC used in the present invention is, for example, reacted with a dihydric phenol compound and phosgene in the presence of an organic solvent inert to the reaction, an aqueous alkaline solution, and then a tertiary amine or quaternary ammonium. Conventional methods such as an interfacial polymerization method in which a polymerization catalyst such as a salt is added and a dihydric phenol compound is dissolved in pyridine or a mixed solvent of pyridine and an inert solvent, and phosgene is introduced to directly produce PC are used. The thing obtained by the manufacturing method of PC is used. In the above reaction, a molecular weight modifier, a branching agent, etc. are used if necessary. The above dihydric phenol is bisphenol A, bisphenol S, tetrabromobisphenol A, tetrachlorobisphenol A.
Known materials such as these can be used.

The compatibilizing agent used in the present invention includes a carbon-carbon double bond, a carbon-carbon triple bond, a carboxyl group, an acid anhydride group, an acid amide group, an imide group and a carboxylic acid ester group in the molecule. , An amino group, an imino group, an epoxy group, a hydroxyl group, an isocyanate group, a mercapto group, a compound having at least one oxazoline ring, for example, fumaric acid, citric acid, malic acid, maleic anhydride, itaconic acid polymer, melamine , One or more selected from aspartic acid derivatives, liquid diene polymers, aromatic hydrocarbon-formaldehyde resins, copolymers of αβ unsaturated dicarboxylic acid anhydrides with styrene compounds or vinyl ether compounds, etc. are used. .

As the impact modifier used in the present invention, MBS, SBR, styrene / butadiene block copolymer, hydrogenated styrene / butadiene block copolymer, hydrogenated SEBS elastomer (Shell Chemical Co., Ltd., a product Name Clayton G), core / shell type elastomer (Takeda Pharmaceutical Co., Ltd., trade name: Stuffloid), MBS type elastomer and Kureha BTA elastomer, polystyrene phase and hydrogen, in which the core layer is made of rubber and the shell layer is made of hard resin. One or more polymers selected from diblock or triblock copolymers (Kuraray Co., Ltd., trade name Septon) composed of the added polyisoprene phase can be used.

The average particle size used in the present invention is 0.06.
Titanium Industry Co., Ltd.
STT-30, STT-30D, STT-65C, Nippon Aerosil Co., Ltd. P25, Ishihara Sangyo Co., Ltd. TTO
-51 series, TTO-55 series, etc. are UF-ZNO manufactured by Mitsui Mining & Smelting Co., Ltd.
FINEX-25, 50, 75 and the like manufactured by Sakai Chemical Industry Co., Ltd. are preferably used. The fine particle titanium oxide and fine particle zinc oxide used in the present invention have an average particle diameter of 0.06 μm.
m or less, preferably having an average particle size of 0.0
It is 5 to 0.005 μm. Particle size is 0.06μ
When it exceeds m, the effect of improving weather resistance is significantly reduced.

The fine particle titanium oxide and / or fine particle zinc oxide used in the present invention is preferably treated with a known surface treatment agent for treating the surface of an inorganic substance such as glass fiber, carbon fiber or mica. Examples of the surface treatment agent used in the present invention include titanate coupling agents, silane coupling agents, aluminum coupling agents, zircoaluminate coupling agents, silylating agents and the like.

The compounding ratio of the resin composition of the present invention is (A)
20 to 80 parts by weight of PPE, (B) 20 to 80 of one or more polymers selected from nylon, polyester and PC
Parts by weight, (C) compatibilizer 0.01 to 20 parts by weight, (D)
Impact modifier 0 to 30 parts by weight, (E) average particle size of 0.
Fine titanium oxide having a particle size of not more than 06 μm and / or zinc oxide having a mean particle size of not more than 0.06 μm
30 parts by weight, preferably (A) PPE 30 to 7
0 parts by weight, (B) 30 to 70 parts by weight of one or more polymers selected from nylon, polyester and PC, (C)
Compatibilizer 0.05 to 10 parts by weight, (D) impact modifier 2
˜20 parts by weight, (E) fine particle titanium oxide having an average particle size of 0.06 μm or less and / or an average particle size of 0.06
It is 0.2 to 20 parts by weight in total of fine zinc oxide particles having a size of μm or less.

PPE with nylon, polyester and P
In the compounding ratio of one or more polymers selected from C,
When PPE is less than 20 parts by weight, heat resistance and mechanical strength are low, and when it exceeds 80 parts by weight, melt viscosity becomes high and molding becomes difficult. When the addition ratio of the compatibilizer is 0.1 parts by weight or less, the dispersion state of the polymer becomes unstable and the mechanical properties vary widely. On the contrary, when it exceeds 20 parts by weight, the retention heat stability and the load deflection temperature It is not preferable because the decrease is large. When the amount of the impact resistance improver exceeds 30 parts by weight, the elastic modulus and the deflection temperature under load become large, which is not preferable. The addition rate of fine particle titanium oxide and / or fine particle zinc oxide is 0.
If it is less than 1 part by weight, the effect of improving the weather resistance is small, and if it is more than 30 parts by weight, the retention heat stability and mechanical properties are largely deteriorated, which is not preferable.

In order to further improve the weather resistance of the weather resistant resin composition of the present invention, the following known ultraviolet absorbers and light stabilizers are added in a total amount of 2 parts by weight per 100 parts by weight of the resin component. It may be added in an amount of not more than 1 part by weight, preferably not more than 1.5 parts by weight. If it exceeds 2 parts by weight, mold deposit is generated, which is not preferable. Examples of salicylic acid-based UV absorbers include p-t-butylphenyl salicylate and p-octylphenyl salicylate. As the benzophenone-based ultraviolet absorber, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone and the like can be used. Examples of the benzotriazole-based ultraviolet absorber include 2- (2′hydroxy-5′-methylphenyl) benzotriazole, 2- (2′hydroxy-5′-tert-butylphenyl) benzotriazole, and 2- (2′hydroxy-). 3 ', 5'-ditertiarybutylphenyl) -5-chlorobenzotriazole and the like can be used. As a cyanoacrylate-based ultraviolet absorber, 2-ethylhexyl-2-cyano-3,3'-
Diphenyl acrylate, ethyl-2-cyano-3,
3'-diphenyl acrylate or the like can be used. As the UV stabilizer, nickel bis (octylphenyl) sulfide, nickel complex-3,5-
Examples include ditertiary butyl-4-hydroxybenzyl phosphoric acid monoethylate. Examples of the hindered amine-based light stabilizer include bis (1,2,2,6,6-pentamethyl-4-piperidyl) oxalate, bis (1,2,2)
2,6,6-Pentamethyl-4-piperidyl) malonate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) adipate, bis (1,2,2,6,6-pentamethyl-4-) Piperidyl) terephthalate can be used.

Other thermoplastic resins such as PS, HIPS, AS, AAS, etc. may be used as long as the object of the present invention is not impaired.
AES, AMBS, styrene resin such as styrene-maleic acid copolymer resin, PC, PE, PP, maleic acid modified PP, POM, PMMA, various aliphatic nylon and aromatic nylon, polyphenylene sulfide, polyether ether ketone, polysulfone, etc. Can also be blended.

The mechanical strength and rigidity of the resin composition of the present invention,
To improve dimensional stability, glass fiber, glass beads, glass flakes, glass fiber cloth, glass fiber mat,
Metal fibers and flakes made of graphite, carbon fiber, carbon fiber cloth, carbon fiber mat, carbon black, carbon flakes, aluminum, stainless steel, brass, copper, etc., metal powder, organic fibers, acicular titanium potassium potassium, mica, One or more kinds of fillers selected from talc, clay, acicular titanium oxide, wollastonite and calcium carbonate may be blended. In order to increase the rigidity and strength and further improve the appearance and smoothness of the molded product, it is preferable to use fibers having a small diameter as the filler. As a fiber having a small diameter, a glass fiber E-FMW- manufactured by Nippon Inorganic Co., Ltd.
800 (average fiber diameter 0.8 μm) and E-FMW-170
0 (average fiber diameter of 0.6 μm) can be exemplified.

The surface of the above-mentioned filler is preferably surface-treated with a known surface treatment agent, that is, a titanate coupling agent, a silane coupling agent, an aluminum coupling agent, a zircoaluminate coupling agent. . Furthermore, the fibers are made of known epoxy type, urethane type,
The sizing agent may be a polyester-based or styrene-based sizing agent.

In the resin composition of the present invention, if necessary,
As a flame retardant, triphenyl phosphate, tricresyl phosphate, a polycondensate thereof, or a known phosphorus compound such as red phosphorus can be added. Further, a halogen compound such as decabromodiphenyl ether, brominated polystyrene, low molecular weight brominated polycarbonate, brominated PPE, or brominated epoxy compound can be added as a flame retardant. Flame retardant aids such as antimony trioxide, antimony tetraoxide, zirconium oxide can also be used in combination with the halogen compound.

The resin composition of the present invention, if necessary,
Known phenolic antioxidants, phosphite antioxidants, thioether antioxidants, hindered phenol compounds, heat stabilizers such as zinc sulfide, and antioxidants can be used. Further, if necessary, antistatic agents, plasticizers, lubricants, release agents, dyes, pigments, etc. can be added.

The resin composition of the present invention can be produced by the equipment and method generally used for producing a thermoplastic resin composition. For example, the components constituting the resin composition of the present invention can be mixed together, melt-kneaded, and extruded to obtain the resin composition of the present invention. Alternatively, a styrene-based polymer, PPE, a compatibilizer, surface-treated or non-surface-treated fine particle titanium oxide and / or fine particle zinc oxide are sufficiently melt-kneaded in a mill, and the kneaded product taken out is cooled to room temperature and further liquid After immersing in nitrogen and cooling, 3-5m
A masterbatch obtained by crushing to a size of m, or a styrene-based polymer and fine particle titanium oxide and / or fine particle zinc oxide are sufficiently melt-kneaded by a pressure kneader and pelletized by an extruder or cooled. Master batch obtained by crushing and PPE reacted with compatibilizer
After mixing the other resin components, the resin composition of the present invention can be obtained by further melt-kneading using a uniaxial or biaxial extruder and extruding.

The resin composition of the present invention is used in addition to injection molding.
Extrusion molding, blow molding, vacuum molding, and pressure molding are also possible.

EXAMPLES The present invention will be specifically described with reference to the following examples and comparative examples, but the present invention is not limited to these. The molding method and test method of the test piece in the examples and comparative examples are as follows.

(1) Raw materials used PPE used was Mitsubishi Gas Chemical Co., Inc., and had an intrinsic viscosity of 0.45 dl / g in chloroform at 25 ° C. As the thermoplastic polyester, PBT used was 2002 manufactured by Polyplastics Co., Ltd., and PET was DIAMONITE PA200 manufactured by Mitsubishi Rayon Co., Ltd. Nylon 6 is Amylan CM1017 manufactured by Toray Industries Inc., PC is Iupilon S-3000 manufactured by Mitsubishi Gas Chemical Co., Inc., and styrene-based polymer is hydrogenated Septon 2002, a styrene-isoprene block copolymer manufactured by Kuraray Co., Ltd. (Abbreviated as Septon) and maleic anhydride (abbreviated as MAn) was used as a compatibilizing agent. Particulate titanium oxide is titanium dioxide P25 (average particle size 0.02μ, manufactured by Nippon Aerosil Co., Ltd.).
m, hereinafter abbreviated as P25), titanium oxide used for comparison is A220 (average particle size 0.2, manufactured by Ishihara Sangyo Co., Ltd.).
0 μm, hereinafter abbreviated as A220). Fine particle zinc oxide is Sakai Chemical Industry Co., Ltd., FINEX-50 (average particle diameter 0.02 μm, hereinafter abbreviated as X-50), and zinc oxide used for comparison is Sakai Chemical Industry Co., Ltd. SF-15
(Average particle diameter 0.18 μm, hereinafter abbreviated as SF15).

As the phosphite heat stabilizer, P-EPQ manufactured by Sand Co. was used. 2- (2'hydroxy-5'-methylphenyl) benzotriazole (abbreviated as BTA) is used as a benzotriazole type ultraviolet absorber, and bis (1,2,2,2) is used as a hindered amine type light stabilizer.
6,6-pentamethyl-4-piperidyl) oxalate (abbreviated as HALS) was used.

(2) Surface Treatment Method of Fine Particle Titanium Oxide and / or Fine Particle Zinc Oxide 100 g of fine particle titanium oxide P25 is added to a super mixer.
Add 30 g of water and 270 g of methanol while stirring.
A mixture of 1.5 g of isopropyl dodecylbenzene sulfonyl titanate was added over 10 minutes. After the addition was completed, stirring was continued for 10 minutes. Particulate titanium oxide obtained by spreading wet P25, drying it at room temperature for 48 hours, and then drying it at 100 to 150 ° C. for 1 hour is called P25T. Fine particles of zinc oxide X-50 treated in the same manner as P25T were treated with X-50.
Call T. Similar surface-treated products of titanium oxide A220 and zinc oxide SF-15 used for comparison with isopropyl dodecyl benzene sulfonyl titanate are referred to as A220T and SF-15T, respectively.

(3) Method for producing composition a1 PPE / Septone / maleic anhydride = 90 / 8.4 /
Cylinder set temperature 28 after mixing at a ratio of 1.6 parts by weight.
The mixture was melt-kneaded with a twin-screw extruder at 0 to 300 ° C. and pelletized to obtain a composition a1.

(4) Production Method of Titanium Oxide and Zinc Oxide and Styrenic Polymer Composition (4-1) Production Method of Compositions b1 and b11 190-210
3.8 parts by weight of Septon and 0.2 parts by weight of P-EPQ were added to Laboplast mill manufactured by Toyo Seiki Co., Ltd., which was set to ℃, and 1 part by weight of fine particle titanium oxide was added over 5 minutes while melt-kneading. Add P25 or P25T. After melting and kneading for another 5 minutes, remove from Labo Plastomill, cool at room temperature,
Next, after immersing and cooling in liquid nitrogen, it was crushed into a size of 3 to 5 mm with a crusher, and each crushed product was made into the composition b1 (P25).
Use) or composition b11 (using P25T). (4-2) Method for producing compositions b2 and b22 (b1) except that A220 or A220T is used as titanium oxide.
Composition b2 (using A220) or b22 under the same conditions as
(Using A220T) was manufactured.

(4-3) Method for producing compositions c1 and c11 1
3.8 parts by weight of Septon and 0.2 parts of P-EPQ were added to Laboplast mill manufactured by Toyo Seiki Co., Ltd., which was set at 90 to 210 ° C.
1 part by weight of particulate zinc oxide X-50 or X-50T is added over 5 minutes while melt-kneading.
After melting and kneading for another 5 minutes, remove from the Labo Plastomill,
It is cooled at room temperature, then immersed in liquid nitrogen and cooled, and then crushed by a crusher to a size of 3 to 5 mm, and each crushed product is used as the composition c1 (using X-50) or c11 (using X-50T). And (4-4) Production Method of Compositions c2 and c22 (c1) except that SF15 or SF15T is used as zinc oxide.
Under the same conditions as the compositions c2 (using SF15) and c22 (S
F15T was used).

(5) Method of molding test piece The components shown in Tables 1 to 4 were added to the cylinder set temperature 270.
The mixture was melt-kneaded with a twin screw extruder having a screw diameter of 30 mm at 0 ° C. to produce pellets. This pellet at 100 ℃ 5
After drying for an hour, a mold temperature of 70 ° C and a cylinder set temperature of 270 to 270 with an SG125 type injection molding machine manufactured by Sumitomo Heavy Industries, Ltd.
At 290 ° C., injection pressure 98 MPa, ASTM-D638
Specified type 1 3.2mm thick tensile test piece, 63.5 ×
12.7 × 3.2 mm Izod impact test piece
0 shot molding is performed, and the presence or absence of adhesion of the light resistance improving agent to the protruding pin of the die is examined, 1 without adhesion, 2 with slight adhesion, 3 with slight adhesion, 3 The case with a large amount of adhered matter was set to 4, and the case with a remarkably large amount of adhered matter was set to 5.

(6) Tensile Strength Measurement Method According to ASTM-D638, five tensile strength tests were conducted using a tensile test piece at a tensile speed of 5 mm / min and a test temperature of 23 ° C. Was measured and the elongation at break (unit:%) was determined.

(7) Oil resistance measurement method Tensile test pieces molded under the conditions of (5) were subjected to a fulcrum distance of 10
Place it on a 0 mm metal jig, give 1.0% bending bending at a position 50 mm from the fulcrum, and soak it in white kerosene (manufactured by Mitsubishi Petroleum Co., Ltd.) at 23 ° C. for 48 hours, and then perform the condition (3) above. The break elongation of the five test pieces was measured by the above, and the oil resistance was compared by the average value of the break elongation of the five test pieces.

(8) Weather Resistance Test A 63.5 × 12.7 × 3.2 mm Izod impact test piece was exposed to a 6.5 KW xenon arc fade meter (CI-65 type manufactured by Atlas, USA). Then, Pyrex glass was attached to the inner part of the filter used and clear glass was attached to the outer part, and the treatment was carried out under conditions of a black panel temperature of 63 ° C. and no rain spray.
The test piece after 300 hours of treatment is manufactured by Nippon Denshoku Industries Co., Ltd. Σ
The yellowing degree ΔYI was measured with a −80 type color difference meter and the quality of light resistance was compared.

Examples 1 to 14 Each component shown in Table 1 and Table 2 was mixed in each ratio (parts by weight),
It was molded and the physical properties were measured. The results are shown in Tables 1 and 2. Comparative Examples 1 to 14 Each component shown in Table 3 and Table 4 was mixed in each ratio (parts by weight),
It was molded and the physical properties were measured. The results are shown in Tables 3 and 4.

[0039]

INDUSTRIAL APPLICABILITY The resin composition of the present invention, when exposed to wind and rain and sunlight during outdoor use, sunlight through a window during indoor use, light from fluorescent lamps, etc., for a long time It is a light-resistant resin composition which has extremely small discoloration and fading, has good appearance, mechanical properties and heat resistance of a molded product, and is free from clogging of a gas vent of a mold at the time of injection molding and from sticking to a protruding pin. In addition to injection molding, extrusion molding, blow molding, vacuum molding, and pressure molding can be used for the molding method of the resin composition of the present invention. INDUSTRIAL APPLICABILITY The resin composition of the present invention can be used in a wide variety of applications such as electric / electronic parts, automobile parts, machine parts, sundries, and other parts to which various kinds of light are irradiated.

[0040]

Table 1 Example No. 1 2 3 4 5 6 7 (blending ratio) Composition a1 40 43 40 35 35 55 55 55 Nylon 50 55 40 PBT 35 40 PET PET 35 35 PC 20 20 Composition b1 10 Composition c11 2 5 10 5 5 10 (Physical properties) Tensile strength 47 54 54 59 48 66 69 68 Break elongation 51 54 43 47 52 52 53 36 Oil resistance 48 52 40 42 42 49 50 30 ΔYI 12 5.5 3.5 2.5 4.5 4.5 2 Pin deposit 1 1 1 1 1 1 1 1 1

[0041]

Table 2 Example number 8 9 10 11 12 12 13 14 (blending ratio) Composition a1 35 35 35 35 38 60 60 55 55 Nylon 55 60 35 PBT 55 35 35 PET 30 35 PC 30 Composition c1 10 Composition c11 5 10 2 5 5 10 (Physical properties) Tensile strength 48 49 49 53 52 64 64 67 65 Break elongation 47 44 46 46 47 52 49 39 Oil resistance 49 42 43 43 42 46 45 30 ΔYI 15 4.0 2.5 5.5 4.5 5.0 2.5 Pin deposit 1 1 1 1 1 1 1 1 1 1

[0042]

Comparative Example No. 1 2 3 4 5 6 7 (blending ratio) Composition a1 50 50 55 55 55 55 55 55 55 Nylon 40 40 40 40 40 PBT 20 35 35 PET 35 PC 20 Composition b2 10 5 Composition b22 10 10 10 Composition c2 5 Composition c225 (Physical properties) Tensile strength 67 64 64 69 68 66 69 69 68 Elongation at break 41 44 53 47 42 42 45 39 Oil resistance 38 42 42 42 42 43 46 33 ΔYI 38 31 42 42 45 45 32 34 34 with pin Kimono 1 1 1 1 1 1 1 1

[0043]

[Table 4] Comparative Example No. 8 9 10 11 12 12 13 14 (blending ratio) Composition a1 60 60 60 60 60 60 60 60 Nylon 40 38 PBT 37 PET 20 39 39 38 37 PC 20 BTA 1 1.5 0.5 1 1.5 HALS 1 1.5 0.5 1 1.5 (Physical properties) Tensile strength 44 53 53 50 45 47 45 66 66 Elongation at break 65 64 64 49 47 52 53 53 38 Oil resistance 58 52 46 46 45 49 49 ΔYI 50 28 21 48 33 33 29 22 Pin attachment 1 4 5 1 2 3 5

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication C08L 67/02 LPF 69/00 LPQ 77/00 LQV

Claims (5)

[Claims] (A) Polyphenylene ether (A) 20-80
Parts by weight, (B) 20 to 80 parts by weight of one or more polymers selected from nylon, polyester and polycarbonate, (C) 0.1 to 20 parts by weight of compatibilizer, (D) 0 to impact modifier. 30 parts by weight and (E) average particle size of 0.0
Fine particles of titanium oxide having a particle size of 6 μm or less and / or zinc oxide particles having an average particle size of 0.06 μm or less, total 0.1 to 3
A resin composition comprising 0 parts by weight. 2. The (A) polyphenylene ether is (2)
6-dimethyl-1,4-phenylene) ether polymer,
2,6-Dimethyl-1,4-phenol / 2,3,6-
One or more polymers selected from trimethyl-1,4-phenol copolymers and graft copolymers obtained by graft-polymerizing styrene onto these copolymers, which have an intrinsic viscosity of 0.60 measured in a chloroform solution at 25 ° C. ~ 0.35dl /
The resin composition according to claim 1, wherein the resin composition is g. 3. The resin composition according to claim 1, wherein the polymer (B) is one or more polymers selected from aliphatic polyesters, aromatic polyesters and wholly aromatic polyesters. 4. The surface of (E) fine particle titanium oxide and / or fine particle zinc oxide is coated with a titanate coupling agent, a silane coupling agent, an aluminum coupling agent, a zircoaluminate coupling agent or a silylating agent. It processed, The resin composition of Claim 1 characterized by the above-mentioned. 5. (E) As fine particle titanium oxide and / or fine particle zinc oxide, a total of 1 part by weight of fine particle titanium oxide having an average particle diameter of 0.06 μm or less and fine particle zinc oxide having an average particle diameter of 0.06 μm or less is used. On the other hand, a masterbatch obtained by adding 0.5 to 100 parts by weight of a styrene-based polymer and melt-kneading is used.
Resin composition.