JPH073070A - Resin composition - Google Patents

Abstract

PURPOSE:To prepare a resin composition excellent in mechanical properties, heat resistance and weather resistance and useful for an electric and electronic component, etc., by blending a specified amount of titanium oxide, cerium oxide or zinc oxide having a specified average particle size with a thermoplastic resin. CONSTITUTION:The objective composition is prepared by blending 0.05 to 10 pts.wt. (preferably 0.3 to 5 pts.wt.) compound selected from particulate titanium oxide, cerium oxide and zinc oxide (preferably treated with a surface treatment such as a titanate coupling agent) respectively having <=0.06mum (preferably <=0.05mum) average particle diameter with 100 pts.wt. thermoplastic resin (e.g. polyethylene, polypropylene or coumarone resin).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition having improved weather resistance, and more specifically, it does not evaporate an ultraviolet absorber during extrusion molding of a sheet or a film, and also during extrusion molding or injection molding. It is a weather-resistant resin composition that does not cause deposits on rolls, molds, etc., and does not impair the appearance, mechanical properties, and heat resistance of molded products, and is particularly resistant to wind and rain, sunlight, and fluorescent light. When it is exposed for a long time, the surface of the molded product is hardly discolored or cracked, and it 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, thermoplastic resins have been used for mass productivity, design flexibility, dimensional accuracy, mechanical properties, electrical properties,
Since it has excellent thermal properties, it is used in a wide range of fields such as electric / electronic parts, automobile parts, machine parts, construction parts, and sundries.

However, when a thermoplastic resin molded product is exposed to wind, rain, sunlight, fluorescent light, etc. for a long time, discoloration or cracking occurs on the surface of the molded product,
It may significantly reduce the commercial value and limit its use. Therefore, when a thermoplastic resin molded article is exposed to wind and rain or various kinds of light, it has been strongly desired to prevent discoloration and fading of the surface of the molded article and to prevent cracks from occurring, that is, to improve weather resistance.

Generally, in order to improve the weather resistance of a thermoplastic resin, an organic low molecular weight compound such as a benzophenone type ultraviolet absorber, a benzotriazole type ultraviolet absorber, a salicylic acid type ultraviolet absorber, a cyanoacrylate type ultraviolet absorber, a hindered amine type is used. A light stabilizer is added.

Thermoplastic resins generally have a molding temperature of 200 ° C. or higher, and so-called engineering plastics often have a molding temperature of more than 300 ° C., so that an ultraviolet absorber added as a weather resistance improver at the time of molding or The hindered amine light stabilizer is easily volatilized. Therefore, during extrusion molding of the sheet or film, the ultraviolet absorber and the hindered amine light stabilizer are volatilized from the tip of the die, which causes environmental pollution. Further, the volatilized ultraviolet absorber or hindered amine-based light stabilizer adheres to the roll, and the adhered matter is partially transferred to the sheet or film, causing a poor appearance. Further, during injection molding, there is a problem that the ultraviolet absorber and the hindered amine light stabilizer adhere to the gas vent of the mold, the ejection pin, and the surface of the molded product, and continuous molding cannot be performed for a long time.

[0006]

SUMMARY OF THE INVENTION In view of the above circumstances,
During extrusion molding of sheets and films, there is no volatilization of weather resistance improvers such as UV absorbers and hindered amine light stabilizers, no adhesion to rolls, blockage of gas vents in molds during injection molding, and protruding pins. It can be molded for a long time with no deposits on the surface, and when the molded product is exposed to wind, rain, sunlight, or fluorescent light for a long time, discoloration or cracking of the molded product surface occurs. Significantly less, the appearance of molded products, mechanical properties,
It is an object of the present invention to provide a weather resistant resin composition which gives a molded article having good heat resistance and fluidity.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventor has carried out multifaceted research on a weather resistance improver to be added for the purpose of improving the weather resistance of a thermoplastic resin. The present invention has been completed by finding that a resin composition in which fine particles of titanium oxide, cerium oxide, and zinc oxide having an average particle diameter of 0.06 μm or less are mixed with a plastic resin shows good results.

That is, the present invention is based on the thermoplastic resin 100.
The present invention relates to a resin composition in which 0.05 to 10 parts by weight of a compound selected from fine titanium oxide, cerium oxide and zinc oxide having an average particle diameter of 0.06 μm or less is mixed with parts by weight.

The resin composition according to the present invention can be produced by the equipment and method generally used for producing a thermoplastic resin composition. When the specific method is illustrated, the following method (1) or (2) is mentioned.

(1) One method is to use a thermoplastic resin and fine particles of titanium oxide, cerium oxide or zinc oxide, and optionally a low molecular weight resin (oligomer) and a solvent and / or
Alternatively, after mixing water and stirring to uniformly disperse it, the solvent and / or water are removed under normal pressure or reduced pressure to form a mixture in which fine particles of titanium oxide, cerium oxide, or zinc oxide are uniformly dispersed. A resin masterbatch is obtained, and the masterbatch and the thermoplastic resin are melt-kneaded with a uniaxial or biaxial extruder to obtain a desired resin composition.

That is, 100 parts by weight of the thermoplastic resin,
(A) 0.25 to 100 parts by weight of one or more compounds selected from fine particles of titanium oxide, cerium oxide and zinc oxide having an average particle diameter of 0.06 μm or less, (b) capable of dissolving a thermoplastic resin Solvent having a melting point of 10 ° C or lower and / or water 1 to
1000 parts by weight of (c) a low molecular weight resin (oligomer) is added and mixed, and the solvent and / or water of (b) above is removed under heating or atmospheric pressure or reduced pressure to obtain fine titanium oxide, A resin masterbatch in which cerium oxide and zinc oxide are uniformly dispersed is obtained, and the resin masterbatch and a thermoplastic resin are mixed and melt-kneaded.

(2) Another method is to use fine particles of titanium oxide, cerium oxide, or zinc oxide in a single-screw or twin-screw extruder, and optionally a low molecular weight resin (oligomer) and a solvent and / or water. After stirring, mixing and uniformly dispersing, the thermoplastic resin is added and mixed, and melt-kneaded while removing the solvent and / or water under reduced pressure with a uniaxial or biaxial extruder to obtain the desired resin composition. obtain.

That is, 100 parts by weight of the thermoplastic resin,
(A) 0.05-10 parts by weight of one or more compounds selected from titanium oxide, cerium oxide, and zinc oxide, which are fine particles having an average particle size of 0.06 μm or less, and (b) can dissolve thermoplastic resin Solvent with a melting point of 10 ° C or lower and / or water 1-1
000 parts by weight, (c) if desired, a low molecular weight resin (oligomer) is added and mixed, and the mixture is melt-kneaded under heating in a uniaxial or biaxial extruder, and the solvent and / or water of the above (b) By removing the above, a resin composition in which a compound selected from fine titanium oxide, cerium oxide and zinc oxide is uniformly dispersed is obtained.

In the above method of once obtaining the resin masterbatch and mixing the resin masterbatch with the thermoplastic resin, the resin masterbatch is used in an amount of 1 to 50% by weight based on the thermoplastic resin to be mixed.

By the way, titanium oxide, cerium oxide and zinc oxide have been conventionally used as fillers for synthetic resins. However, titanium oxide, cerium oxide, and zinc oxide, which have been conventionally used as fillers, have an average particle size of 0.
When the particle size is 10 μm or more, and the particle size is large, although the weather resistance is somewhat improved, a sufficient effect cannot be obtained as shown in Comparative Examples described later.

The average particle size used in the present invention is 0.06μ.
Examples of fine particles of titanium oxide, cerium oxide, and zinc oxide having a particle size of m or less, preferably 0.05 μm or less include those sold by Nippon Aerosil, Titanium Industry, Sakai Chemical Co., Ltd., Honjo Chemical Co., Ltd., and the like. Of these, ultrafine particles of titanium oxide, cerium oxide, and zinc oxide having an average particle diameter of 0.06 to 0.002 μm are particularly preferable.

In the present invention, titanium oxide, cerium oxide having a thickness of 0.06 μm or less, preferably 0.05 μm or less,
Zinc oxide 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.

Such surface treatment agents include titanate coupling agents, silane coupling agents, aluminum coupling agents, zircoaluminate coupling agents, known coupling agents such as silylating agents, and silanol-modified silicone. Oil, alkoxy modified silicone oil,
Examples thereof include carboxyl modified silicone oil, epoxy modified silicone oil, amino modified silicone oil, alcohol modified silicone oil, SiH modified silicone oil and the like.

As the solvent having a melting point of 10 ° C. or lower, which can dissolve the thermoplastic resin used in the present invention, for example, acetone,
Methanol, ethanol, propanol, ethyl methyl ketone, dimethyl ether, diethyl ether, dichloroethane, dichloroethylene, trichloroethane, trichloroethylene, chloroform, carbon tetrachloride, dichloropropane, dichloropropene, ethyl formate, propyl formate, methyl chloroformate, chloromethyl methyl ether,
Examples thereof include ethyl acetate, cyclohexane, tetrahydrofuran, butyraldehyde, ethyl propionate, and n-heptane.

The thermoplastic resin used in the present invention includes polystyrene, high-impact polystyrene, polyparamethylstyrene, ABS, AAS, AS, MBS,
MS, AES, styrene resin such as styrene / maleic anhydride copolymer: 6 nylon, 6,6 nylon, 4,
Aromatic nylon such as 6 nylon, 11 nylon and 12 nylon, aromatic nylon such as polyhexadiamine terephthalamide, polyhexadiamine isophthalamide and polymetaxylene diamine adipinsanamide: sold as AQ nylon by Toray Industries, Inc. Soluble in alcohol or water such as nylon, polycarbonate, polyethylene, polypropylene, maleated polypropylene, polymethylmethacrylate, polybutylene terephthalate, polyethylene terephthalate, polyphenylene ether, polysulfide, polysulfone, polyether ether ketone, coumarone resin, vinyl acetate Examples include resins, phenoxy resins, polymethylpentene resins, and the like. When two or more kinds of polymers are used in combination, a commonly known compatibilizing agent such as an organic acid anhydride may be used.

In the present invention, fine particles of titanium oxide,
When blending cerium oxide and zinc oxide into a thermoplastic resin, if these are mixed directly with the solvent and / or water into the thermoplastic resin, the dispersion becomes insufficient and it is difficult to obtain a homogeneous mixture. It is preferable to use a low molecular weight resin (oligomer) together with water.

Such low molecular weight resin (oligomer)
Examples of such oligomers include carbonate oligomers, PPE oligomers, PP oligomers, PE oligomers, styrene oligomers, α-methylstyrene oligomers, AS oligomers and MS oligomers.
These are generally used in the range of 1 to 100 parts by weight, preferably 3 to 10 parts by weight.

In the resin composition of the present invention, one or more kinds of compounds selected from titanium oxide, cerium oxide and zinc oxide are used in an amount of 0.05 to 10 parts by weight.
When the amount is less than 5 parts by weight, the desired effect of improving the weather resistance is small, and when the amount is more than 10 parts by weight, the thermal stability of the weather resistant resin composition tends to decrease, which is not preferable. Usually, it is preferably 0.3 to 5 parts by weight.

In obtaining the resin composition of the present invention, the amount of the solvent and / or water having a melting point of 10 ° C. or less capable of dissolving the thermoplastic resin is 1 to 1000 parts by weight, but 1 part by weight or more is used. When the amount is small, it is difficult to uniformly disperse at least one compound selected from titanium oxide, cerium oxide and zinc oxide in the thermoplastic resin.
If it exceeds the weight part, a large amount of energy is required for removing the solvent and / or water, which is not preferable in practice.

If desired, the resin composition of the present invention may further contain an impact resistance improver and the like. Such impact modifiers include SBR, styrene / butadiene block copolymers, hydrogenated styrene / butadiene block copolymers, SEBS elastomers (for example, those sold by Shell Chemistry under the trade name Kraton G),
Core / shell type elastomer (for example, sold by Takeda Pharmaceutical Co., Ltd. under the trade name of STAFLOY) in which the core layer is made of rubber and the shell layer is made of hard resin, MBS elastomer, BTA elastomer, polystyrene Or triblock copolymer consisting of phase and hydrogenated polyisoprene phase (eg, Co., Ltd.)
Sold by Kuraray under the product name of Septon),
Commonly known elastomers such as polyester elastomers and polyamide elastomers are exemplified, and these can be used alone or in combination of two or more.

Further, the resin composition of the present invention is further improved in weather resistance by adding a known ultraviolet absorber and a light stabilizer in a total amount of less than 1.0 part by weight to 100 parts by weight of the resin component. be able to. If the blending amount exceeds 1.0 part by weight, as described above, the volatilized ultraviolet absorber adheres to the roll during the extrusion process, and the adhered matter is partially transferred to the sheet or film, causing poor appearance. . At the time of injection molding, additives adhere to the gas vent of the mold, the ejection pin, and the surface of the molded product, which is not preferable.

Examples of known ultraviolet absorbers include salicylic acid type ultraviolet absorbers, benzophenone type ultraviolet absorbers, benzotriazole type ultraviolet absorbers, and cyanoacrylate type ultraviolet absorbers. Moreover, you may add a hindered amine light stabilizer as a light stabilizer.

As the salicylic acid type ultraviolet absorber, p-
There are t-butylphenyl salicylate, p-octylphenyl salicylate and the like. Examples of the benzophenone-based ultraviolet absorber include 2.4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, and 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 and 2- (2'hydroxy-
5'-tertiarybutylphenyl) benzotriazole, 2- (2'hydroxy-3'.5'-ditertiarybutylphenyl) -5-chlorobenzotriazole and the like can be used. Examples of the cyanoacrylate-based ultraviolet absorber include 2-ethylhexyl-2-cyano-3.3'-diphenyl acrylate and ethyl-2-cyano-3.3.
′ -Diphenyl acrylate and the like.

Examples of the light stabilizer include nickel bis (octylphenyl) sulfide and nickel complex-3.5-ditertiary butyl-4-hydroxybenzyl phosphoric acid monoethylate. As a hindered amine light stabilizer, bis (1.2.2.2.6.6-
Pentamethyl-4-piperidyl) oxalate, bis (1.2.2.6.6-pentamethyl-4-piperidyl) malonate, bis (1.2.2.6.6-pentamethyl-4-piperidyl) adipate, bis ( 1.2.
2.6.6-pentamethyl-4-piperidyl) terephthalate and the like.

In addition to the glass fiber, glass beads, glass flakes, glass fiber cloth, glass fiber mat, graphite, carbon fiber, carbon fiber cloth, carbon fiber mat, carbon black, carbon flake, the resin composition of the present invention, Select from metal fibers and flakes made from aluminum, stainless steel, brass and copper, metal powder, organic fibers, acicular titanium potassium potassium, mica, talc, clay, (acicular) titanium oxide, wollastonite, calcium carbonate, etc. It is possible to improve mechanical strength, rigidity, dimensional accuracy, etc. by adding one or more kinds of reinforcing agents.

In order to enhance the mechanical strength such as rigidity and strength of the molded product and further improve the appearance and smoothness of the molded product,
It is preferable to use fibers having a small diameter as the fibers. As such a glass fiber having a small fiber diameter, for example, E-FMW-800 (average fiber diameter 0.8 μm) and E-FMW-1700 (average fiber diameter 0.6 μm) manufactured by Nippon Inorganic Co., Ltd. are exemplified. be able to.

The surface of the above-mentioned reinforcing agent is treated with a surface treating agent, for example, a titanate cup such as vinylalkylsilane, methacryloalkylsilane, epoxyalkylsilane, aminoalkylsilane, mercaptoalkylsilane, chloroalkylsilane or isopropyltriisostearoyl titanate. You may perform surface treatment with a ring agent, a zircoaluminate coupling agent, etc. Further, as a sizing agent for fibers, a sizing agent such as an epoxy-based, urethane-based, polyester-based or styrene-based sizing agent may be used for sizing treatment.

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. Also, brominated polystyrene, low molecular weight brominated polycarbonate,
Halogen compounds such as brominated epoxy compounds can be added as flame retardants. Flame retardant aids such as antimony trioxide, antimony tetraoxide, zirconium oxide can also be used in combination with the halogen compound.

In the resin composition of the present invention, if necessary, a heat- and antioxidant such as a phenol-based, phosphite-based, thioether-based, hindered phenol-based or zinc sulfide known per se may be used. You can also Further, an antistatic agent, a plasticizer, a lubricant, a release agent, a dye, a pigment and the like can be added.

[0035]

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.

The surface treatment agents for titanium oxide, cerium oxide and zinc oxide used in the examples and comparative examples of the present invention are:
Zircoaluminate coupling agent (Kusumoto Kasei Co., Ltd.)
Processed as follows, using part number A) sold by

That is, 100 parts by weight of titanium oxide, cerium oxide, and zinc oxide were added to a super mixer, and 30 parts by weight of water, 270 parts by weight of methanol, 8 parts by weight of a zircoaluminate coupling agent, product number A were added while stirring. The mixed solution of is added dropwise over 10 minutes. 1 more after the dropping
Stir for 0 minutes. Then, after drying at room temperature for 48 hours, 1 more
Titanium oxide, cerium oxide and zinc oxide dried at 00 to 110 ° C. for 1 hour were obtained. The following surface treated titanium oxide,
For cerium oxide and zinc oxide, add T at the end,
Distinguish from untreated products.

Example 1 5 parts by weight of a carbonate oligomer derived from bisphenol A having a polymerization degree of 7 manufactured by Mitsubishi Gas Chemical Co., Inc., 25 parts by weight of methylene chloride, and 3 parts by weight of cerium oxide (T) having an average particle diameter of 0.05 μm. The parts are mixed and stirred to prepare a uniformly dispersed mixed solution. On the other hand, in a Henschel mixer,
Prepare 300 parts by weight of PBT (Product No. 2002 of Polyplastics Co., Ltd.), add the above mixture to it, and stir for 5 minutes. Then, polycarbonate resin powder (Mitsubishi Gas Chemical Co., Inc.)
(Manufactured by Iupilon S2000), and then stirred for 10 minutes. 5 parts by weight of the polycarbonate oligomer thus prepared and cerium (T) 3
Parts by weight, PBT 300 parts by weight, polycarbonate resin 3
A mixture consisting of 00 parts by weight is used at a cylinder set temperature of 20.
Extruded pellets are produced under reduced pressure at 0 to 260 ° C. by a vented twin-screw extruder having a screw diameter of 30 mm.

The pellets are dried at 80 to 120 ° C. for 5 hours, and the temperature of the mold is 40 ° C. and the temperature of the cylinder is set to 230 to 28 by an injection molding machine (SG125 manufactured by Sumitomo Heavy Industries).
63.5 mm × 12.7 at 0 ° C. and injection pressure of 98 MPa
mm shot of 3.2 mm Izod impact test pieces can be molded in 8 shots in 1 shot by 100 shots, and check the sticking state of the die protruding pin and the mold deposit (hereinafter abbreviated as deposit) of the mold. It was

The case where no adhered matter was generated was judged as 1, the case where it was slightly generated was 2, the case where it was generated was 3, and the case where it was generated was 4. In addition, the test piece is a 6.5 KW xenon arc type fade meter (manufactured by Atlas, USA,
(CI-65 type) exposure table, 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 the treatment for 500 hours was measured with a Σ-80 type color difference meter manufactured by Nippon Denshoku Industries Co., Ltd. and the yellowing degree ΔYI
Was measured to judge whether the weather resistance was good or bad. As a result, no adhered matter was observed (Judgment 1), and the degree of yellowing ΔYI was 2.0, indicating good weatherability.

Comparative Example 1 A test was conducted under the same conditions as in Example 1 except that cerium oxide was not used in Example 1. As a result, no deposits were generated and the judgment was 1, but the degree of yellowing ΔYI was 13, the degree of yellowing was large, and the weather resistance was poor. The test was conducted under the same conditions as in Example 1 except that cerium (T) oxide having a particle size of 0.3 μm was used. As a result, no adhered matter was generated and the judgment was 1, the yellowing degree ΔYI was 10, the yellowing degree was large, and the weather resistance was poor.

Examples 2 to 9 10 parts by weight of low-molecular-weight polystyrene having a number average molecular weight of 5000 (Hymer ST-95, manufactured by Sanyo Kasei Co., Ltd.), 100 parts by weight of methylene chloride, and an average particle diameter of 0.05 μm.
3 parts by weight of zinc oxide (T), or average particle size 0.03μ
3 parts by weight of titanium oxide (T) of m were mixed and stirred to prepare a uniformly dispersed mixed solution. Then, methylene chloride was removed at 80 ° C. under reduced pressure and then pulverized to obtain low molecular weight polystyrene and zinc oxide (T) having an average particle size of 0.05 μm.
To obtain a composition (referred to as ZTSA), or a composition (referred to as TTSA) including low molecular weight polystyrene and 3 parts by weight of titanium oxide (T) having an average particle diameter of 0.03 μm.

This ZTSA or TTSA was mixed with the thermoplastic resin in the ratio shown in Table 1, and the test was carried out in the same manner as in Example 1, and the test results are shown in Table 1. The mixing ratio of each component in Table 1 is shown in parts by weight. The thermoplastic resins used are as follows.

Resin Name Manufacturer Grade HIPS Denki Kagaku Kogyo Co., Ltd. HI-S-2 ABS Denki Kagaku Kogyo Co., Ltd. GR-1000 6 Nylon Toray Co., Ltd. CM-1017 PET Mitsubishi Rayon Co., Ltd. PA200 PPE Mitsubishi Gas Chemical ( AH60 PC Mitsubishi Gas Chemical Co., Ltd. S3000

Comparative Examples 2-9 Except that zinc oxide (T) having an average particle size of 0.2 μm or titanium oxide (T) having an average particle size of 0.25 μm was used.
In the same manner as in Example 2, a composition containing zinc oxide (T) having an average particle size of 0.2 μm (referred to as ZTSB) and a composition containing titanium oxide (T) having an average particle size of 0.25 μm ( TTSB) was obtained. This ZTSB, TTS
B was mixed with the thermoplastic resin in the ratio shown in Table 2 and tested in the same manner as in Example 2, and the test results are shown in Table 2. In addition,
The mixing ratio of each component in Table 2 is shown in parts by weight.

In the comparative example, an ultraviolet absorber and a light stabilizer were used. The benzotriazole-based UV absorber used was 2- (2'-hydroxy-5'-methylphenyl).
Benzotriazole (hereinafter abbreviated as UVA), hindered amine-based light stabilizer, bis (1, 2, 2, 6, 6-
Pentamethyl-4-piperidyl) oxalate (hereinafter H
(Abbreviated as ALS).

[0047]

[Table 1] (Note) ZTSA in the table is an average particle size of 0.05 after surface treatment.
Using μm zinc oxide (T). TTSA uses titanium oxide (T) with a surface-treated average particle size of 0.03 μm.
MD judgment is the judgment of the state of the attached matter

[0048]

[Table 2] (Note) ZTSB in the table has an average particle size of 0.2μ after surface treatment.
m zinc oxide (T) is used. TTSB uses titanium oxide (T) with a surface-treated average particle size of 0.25 μm. M
D judgment is the judgment of the state of the attached matter

[0049]

INDUSTRIAL APPLICABILITY The resin composition of the present invention has no volatilization of the weather resistance improver during extrusion molding of a sheet or film, and does not generate deposits on rolls or molds during extrusion molding or injection molding. Moreover, discoloration and cracks on the surface of the molded product are remarkable when exposed to wind and rain, sunlight, fluorescent light, etc. for a long time without impairing the appearance, mechanical properties and heat resistance of the molded product. There are few, and it can be used in a wide range of fields such as electric / electronic parts, automobile parts, machine parts, and sundries.

Claims (6)

[Claims] 1. A compound selected from fine titanium oxide, cerium oxide, and zinc oxide having an average particle diameter of 0.06 μm or less based on 100 parts by weight of a thermoplastic resin is added in an amount of 0.05.
A resin composition containing 10 to 10 parts by weight. 2. 0.05 to 10 parts by weight of a compound selected from (a) fine titanium oxide, cerium oxide and zinc oxide having an average particle size of 0.06 μm or less in 100 parts by weight of at least one thermoplastic resin. Part, and (b) a solvent having a melting point of 10 ° C. or less and / or water capable of dissolving the thermoplastic resin 1-1.
The resin composition according to claim 1, which is obtained by melt-kneading a mixture having 000 parts by weight dispersed therein under heating to remove the solvent (b) and / or water. 3. 100 to 100 parts by weight of at least one thermoplastic resin, 0.25 to 100 parts by weight of a compound (a) selected from (a) fine titanium oxide, cerium oxide and zinc oxide having an average particle size of 0.06 μm or less. Parts, and (b) a solvent having a melting point of 10 ° C. or less and / or water capable of dissolving the thermoplastic resin 1 to
A resin master containing a compound selected from titanium oxide, cerium oxide, and zinc oxide by heating the mixture in which 1000 parts by weight is dispersed and removing the solvent and / or water of the above (b) under normal pressure or reduced pressure. The resin composition according to claim 1, wherein a batch is obtained and the masterbatch is mixed with a thermoplastic resin and melt-kneaded. 4. The resin composition according to claim 3, wherein the resin masterbatch is blended in an amount of 1 to 50% by weight based on the thermoplastic resin. 5. A compound selected from fine titanium oxide, cerium oxide and zinc oxide having an average particle diameter of 0.06 μm or less, which has been treated with a surface treatment agent. Resin composition. 6. An average particle diameter of a compound selected from fine titanium oxide, cerium oxide and zinc oxide is 0.06 to 0.0.
The resin composition according to claim 1, which has a thickness of 02 μm.