JPH1045981A - Lightfast resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of lightfastness, esp. resistance to discoloration of coloration caused by natural light or ultraviolet rays of a styrenic or polycarbonate resin by adding a small amt. of a colorant, such as a special dye, thereto. SOLUTION: A lightfast resin compsn. is prepd. by adding 0.0001-0.2 pt.wt. yellow colorant fadable by ultraviolet rays to 100 pts.wt. styrenic or polycarbonate resin. The colorant is pref. a quinaline or azo colorant. A pref. light-fast resin compsn. is the one prepd. by adding 0.2-15 pts.wt. titanium oxide or zinc oxide to 100 pts.wt styrenic or polycarbonate resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel light-resistant resin composition, and a molded article using the same as a molding material and suitable for a special field. More specifically, a light-resistant resin in which a specific colorant is blended with a styrene resin and / or a polycarbonate resin, preferably a metal oxide is added to improve light resistance, and further a flame retardant and a flame retardant auxiliary are blended. The present invention relates to compositions and special fields of light-resistant equipment housings using them as molding materials.

[0002]

2. Description of the Related Art Molded products made of various synthetic resins generally generate radicals, generate oxides, generate double bonds, react with various additives, etc. when exposed to natural light, especially short-wavelength ultraviolet rays, for a long time. The phenomenon of coloring, discoloration, and reduction in mechanical strength is often observed, and as a countermeasure, methods such as addition of an ultraviolet absorber, mixing of a dark colorant, and colorless or colored coating of a molded article have been adopted. On the other hand, it is often desirable to use the specific molding color of various synthetic resins as much as possible as the molded product color. In this respect, it is necessary to add a colorless or nearly colorless UV absorber to the synthetic resin molding material. However, the ultraviolet absorber conventionally used often bleeds out or evaporates over time during thermoforming or after molding, and the original ultraviolet absorbing effect often disappears in a short time. Furthermore,
When a flame retardant is added, coloring considered to be due to the reaction between the flame retardant and the ultraviolet absorber, in the case of a halogen-based flame retardant, discoloration due to the action of ultraviolet rays on the halogen atom, coloring phenomenon, and other flame retardancy Also, the impact resistance was lowered, and the addition of the ultraviolet absorber was meaningless. As an alternative to adding an ultraviolet absorber to these synthetic resin compositions,
Although there is a transparent or nearly transparent coating method using a paint containing the ultraviolet absorber, it is difficult to fundamentally solve the problem of the maintenance period of the above effects, and furthermore, there is also a problem of an increase in the number of coating operation steps. In addition, it is not a preferred method.

Further, housings of electric or electronic equipment products such as computers, televisions, and room coolers have a complicated structure, and are required to have not only rigidity and mass productivity but also easy moldability. Dimensional accuracy, dimensional stability, etc. are required, and styrene-based resins and polycarbonate-based resins are known as resins that best meet these requirements. However, these styrenic resins and polycarbonate resins also have the same problems of discoloration caused by the ultraviolet rays, regardless of the presence or absence of the flame retardant, and various problems associated with the conventional countermeasures, as with other synthetic resins. There is a need for a solution.

[0004]

Under these circumstances, the present invention provides a molded article of styrene resin and / or polycarbonate resin, especially a molded article containing no or little added colorant, It is an object of the present invention to solve the problem of light resistance of a molded article when a halogen-based flame retardant is added, particularly the conventional discoloration or coloring problem caused by natural light or ultraviolet light.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, a small amount of a coloring agent such as a special dye is added to a styrene resin and / or a polycarbonate resin. And completed the present invention. That is, the gist of the present invention is as follows. (1) Light resistance obtained by blending (B) 0.0001 to 0.2 part by weight of a yellow colorant having ultraviolet discoloration with respect to 100 parts by weight of (A) a styrene resin and / or a polycarbonate resin. Resin composition. (Second) (B) a yellow colorant having ultraviolet discoloration property,
A quinoline colorant and / or an azo colorant,
The light-resistant resin composition according to the above. (3) The above (1) or (2), wherein (A) 0.2 to 15 parts by weight of titanium oxide and / or zinc oxide is blended with respect to 100 parts by weight of the styrene resin and / or the polycarbonate resin. Light-fast resin composition. (Fourth) (A) From the group consisting of brominated bisphenol type epoxy polymer, polyhalogenated diphenylalkane, ethylenebistetrabromophthalimide and hexabromocyclododecane, based on 100 parts by weight of styrene resin and / or polycarbonate resin. The above-mentioned first to third components, wherein 2 to 40 parts by weight of at least one selected flame retardant (D) and 0 to 10 parts by weight of (E) a flame retardant aid are blended.
The light-resistant resin composition according to any one of the above. (Fifth) A housing for an electric or electronic device product using the light-resistant resin composition according to any one of the first to fourth aspects as a molding material.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The synthetic resin used in the present invention is (A) a styrene resin and / or a polycarbonate resin. The (A) styrene resin referred to in the present invention is a styrene homopolymer, a styrene homopolymer, a copolymer, or a styrene monomer and / or a styrene monomer having a nuclear substituent such as an alkyl group, an alkoxy group, a vinyl group, or a halogen. A mixture of these, a styrene monomer and / or a copolymer composed of the styrene monomer and another comonomer, or a mixture thereof, or a mixture obtained by adding a rubber component to these various polymers or mixtures. However, the content of styrene or styrene-based monomer in the styrene copolymer or the above-mentioned various mixtures is preferably 50% by weight or more from the viewpoint of maintaining the rigidity of the molded article such as the housing. In addition, the three-dimensional structure of the styrene or styrene-based polymer part in the styrene-based resin according to the present invention is not particularly limited, and may be any of an atactic, isotactic, or syndiotactic structure.

Specifically, a styrene (homo) polymer,
Polyparamethylstyrene, high impact polystyrene, ABS resin, AAS resin, AS resin, MBS resin,
Examples include MS resin, AES resin, styrene-maleic anhydride copolymer, and the like.

[0008] The (A) polycarbonate resin referred to in the present invention may be a resin obtained by an interfacial polycondensation method typified by a method of directly reacting bisphenol and phosgene, or a method of melt-polymerizing a dihydroxy compound and a carbonic acid diester. Examples include, but are not limited to, those obtained by a transesterification method as a representative example, but the polycarbonate resin obtained is one having a carbonic acid diester of a dihydroxy compound as a main component. The compound will be described.

The dihydroxy compound typically includes an aromatic dihydroxy compound and an aliphatic dihydroxy compound, and at least one of them is used. The aromatic dihydroxy compound has the general formula (I)

[0010]

Embedded image

Compounds represented by the following formulas can be mentioned.
In the general formula (I), R ¹ and R ² each represent a halogen atom of fluorine, chlorine, bromine, or iodine or an alkyl group having 1 to 8 carbon atoms, for example, a methyl group, an ethyl group, an n-
Propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, pentyl,
It represents a hexyl group, a cyclohexyl group, a heptyl group, an octyl group, or the like. R ¹ and R ² may be the same or different. The plurality of R ¹ is when R ¹ are a plurality may be the same or different, a plurality of R ² if R ² there are a plurality may be the same or different. m and n are each an integer of 0-4. Z is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or -S-, −
SO—, —SO ₂ —, —O—, —CO— bond or formula (II) or (II ′)

[0012]

Embedded image

[0013] The bond shown by the following is shown. Examples of the alkylene group having 1 to 8 carbon atoms and the alkylidene group having 2 to 8 carbon atoms include:
Examples thereof include a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, an ethylidene group, an isopropylidene group and the like. As a cycloalkylene group having 5 to 15 carbon atoms and a cycloalkylidene group having 5 to 15 carbon atoms, Examples thereof include a cyclopentylene group, a cyclohexylene group, a cyclopentylidene group, and a cyclohexylidene group.

Examples of the aromatic dihydroxy compound represented by the above general formula (I) include bis (4-hydroxyphenyl) methane; bis (3-methyl-4-hydroxyphenyl) methane; and bis (3-chloro-4). -Hydroxyphenyl) methane; bis (3,5-dibromo-4-hydroxyphenyl) methane; 1,1-bis (4-hydroxyphenyl) ethane; 1,1-bis (2-t-butyl-4)
-Hydroxy-3-methylphenyl) ethane; 1-phenyl-1,1-bis (3-fluoro-4-hydroxy-
3-methylphenyl) ethane; 2,2-bis (4-hydroxyphenyl) propane (commonly known as bisphenol A);
2,2-bis (3-methyl-4-hydroxyphenyl)
Propane; 2,2-bis (2-methyl-4-hydroxyphenyl) propane; 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) propane; 1,1-bis (2-t-butyl- 4-hydroxy-5-methylphenyl) propane; 2,2-bis (3-chloro-4-hydroxyphenyl) propane; 2,2-bis (3-fluoro-4-hydroxyphenyl) propane; 2,2-bis (3-bromo-4-hydroxyphenyl) propane;
2,2-bis (3,5-difluoro-4-hydroxyphenyl) propane; 2,2-bis (3,5-dichloro-
4-hydroxyphenyl) propane; 2,2-bis (3,5-dibromo-4-hydroxyphenyl) propane; 2,2-bis (4-hydroxyphenyl) butane;
2,2-bis (4-hydroxyphenyl) octane;
2,2-bis (4-hydroxyphenyl) phenylmethane; 2,2-bis (4-hydroxy-1-methylphenyl) propane; 1,1-bis (4-hydroxy-t-butylphenyl) propane; 2-bis (4-hydroxy-3-bromophenyl) propane; 2,2-bis (4
-Hydroxy-3,5-dimethylphenyl) propane;
2,2-bis (4-hydroxy-3-chlorophenyl)
Propane; 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane; 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane; 2,2-
Bis (3-bromo-4-hydroxy-5-chlorophenyl) propane; 2,2-bis (3-phenyl-4-hydroxyphenyl) propane; 2,2-bis (4-hydroxyphenyl) butane; 2,2- Bis (3-methyl-4
-Hydroxyphenyl) butane; 1,1-bis (2-butyl-4-hydroxy-5-methylphenyl) butane;
1,1-bis (2-t-butyl-4-hydroxy-5-
1,1-bis (2-t-butyl-4-hydroxy-5-methylphenyl) isobutane; 1,1-bis (2-t-amyl-4-hydroxy-
5-methylphenyl) butane; 2,2-bis (3,5-
Dichloro-4-hydroxyphenyl) butane; 2,2-
Bis (3,5-dibromo-4-hydroxyphenyl) butane; 4,4-bis (4-hydroxyphenyl) heptane; 1,1-bis (2-t-butyl-4-hydroxy-
Bis (hydroxyaryl) such as 5-methylphenyl) heptane; 2,2-bis (4-hydroxyphenyl) octane; 1,1- (4-hydroxyphenyl) ethane
Alkanes; 1,1-bis (4-hydroxyphenyl)
Cyclopentane; 1,1-bis (4-hydroxyphenyl) cyclohexane; 1,1-bis (3-methyl-4-
1,1-bis (3-cyclohexyl-4-hydroxyphenyl) cyclohexane; 1,1-bis (3-phenyl-4-hydroxyphenyl) cyclohexane; 1,1-bis (4-hydroxyphenyl) Bis (hydroxyaryl) cycloalkanes such as -3,5,5-trimethylcyclohexane; bis (4-hydroxyphenyl) ether; bis (hydroxyaryl) ether such as bis (4, -hydroxy-3-methylphenyl) ether Kind; screw (4
Bis (hydroxyaryl) sulfides such as bis (3-methyl-4-hydroxyphenyl) sulfide; bis (4-hydroxyphenyl) sulfoxide; bis (3-methyl-4-hydroxyphenyl) sulfoxide; Bis (hydroxyaryl) sulfoxides such as bis (3-phenyl-4-hydroxyphenyl) sulfoxide; bis (4-hydroxyphenyl) sulfone; bis (3-methyl-4-hydroxyphenyl) sulfone; bis (3-phenyl-4)
Bis (hydroxyaryl) sulfones such as -hydroxyphenyl) sulfone; 4,4'-dihydroxybiphenyl;4,4'-dihydroxy-2,2'-dimethylbiphenyl;4,4'-dihydroxy-3,3'-Dimethylbiphenyl;4,4'-dihydroxy-3,3'-
Dicyclohexylbiphenyl; 3,3'-difluoro-
And dihydroxybiphenyls such as 4,4'-dihydroxybiphenyl.

Examples of the aromatic dihydroxy compound other than the general formula (I) include dihydroxybenzenes, halogen- and alkyl-substituted dihydroxybenzenes.
For example, resorcin, 3-methyl resorcin, 3-ethyl resorcin, 3-propyl resorcin, 3-butyl resorcin, 3-t-butyl resorcin, 3-phenyl resorcin, 3-cumyl resorcin; 2,3,4,6- Tetrafluororesorcin; 2,3,4,6-tetrabromoresorcin; catechol, hydroquinone, 3-methylhydroquinone, 3-ethylhydroquinone, 3-propylhydroquinone, 3-butylhydroquinone, 3
-T-butylhydroquinone, 3-phenylhydroquinone, 3-cumylhydroquinone; 2,5-dichlorohydroquinone; 2,3,5,6-tetramethylhydroquinone; 2,3,4,6-tetra-t-butylhydroquinone 2,3,5,6-tetrafluorohydroquinone; and 2,3,5,6-tetrabromohydroquinone.

There are various aliphatic dihydroxy compounds. For example, butane-1,4-diol; 2,2-dimethylpropane-1,3-diol;
Hexane-1,6-diol; diethylene glycol;
Triethylene glycol; tetraethylene glycol;
Octaethylene glycol; dipropylene glycol;
N, N-methyldiethanolamine; cyclohexane-
1,3-diol; cyclohexane-1,4-diol; 1,4-dimethylolcyclohexane; p-xylylene glycol; 2,2-bis- (4-hydroxycyclohexyl) -propane and ethoxy of a dihydric alcohol or phenol Or propoxylation products such as bis-oxyethyl-bisphenol A; bis-oxyethyl-tetrachlorobisphenol A or bis-oxyethyl-tetrachlorohydroquinone.

The synthetic resin (A) used in the present invention is at least one of the above-mentioned styrene resins and polycarbonate resins, and the mixing ratio when used as a mixture is not particularly limited. In order to obtain the characteristics of each resin, it is preferably selected from a blending range of 15/85 to 85/15. In addition, in order to improve the compatibility when different kinds of synthetic resins are blended, a compatibilizer such as an organic acid anhydride can be used.

The (B) yellow colorant having ultraviolet discoloration referred to in the present invention is a colorant which is added to and kneaded with the above-mentioned styrene resin and / or polycarbonate resin, and is easily discolored by irradiation with natural light or ultraviolet light after molding. And a quinoline-based colorant and an azo-based colorant are preferred, and a quinoline-based dye and an azo-based dye are particularly preferred. Specific examples include quinoline-based solvent yellow 157, azo-based solvent yellow 16, and solvent yellow 14 in color index (CI) display. In comparison with these, quinoline-based Disperse Yellow 54, titanium yellow-based Pigment Yellow 53, yellow iron oxide-based Pigment Yellow 42, and the like do not have ultraviolet discoloration, and therefore, as the yellow colorant according to the present invention, Improper. However, in the present invention, in addition to the (B) yellow colorant having ultraviolet discoloration, a colorant complementary to the yellow colorant (B) or a desired colorant for toning required for the final product Is not excluded, and various known colorants can be toned by computer color matching technology. As the toning colorant, a toning pigment or dye which is non-fading to ultraviolet rays is preferably used.

The amount of the yellow colorant having ultraviolet discoloration (B) to be added is preferably 0.0001 to 0.2 part by weight, more preferably 0. 0001 to 0.2 part by weight, per 100 parts by weight of the styrene resin and / or the polycarbonate resin. 0.0005 to 0.1 part by weight. If the addition amount is less than 0.0001 part by weight, the effect of improving light resistance is insufficient, and if it exceeds 0.2 part by weight, desired toning of the molded article becomes difficult. In the case of the particularly preferred range,
When the amount is less than 0.0005 parts by weight, there is no practical problem in terms of the effect of improving light resistance, but the effect tends to decrease in some cases. On the other hand, when the amount exceeds 0.1 part by weight, there is no practical problem in terms of toning of the molded product, but there is a case where there is a tendency to decrease in terms of ease of toning.

If desired, (A) a metal oxide for improving the light resistance of the styrene resin and / or the polycarbonate resin is added to the composition. As the metal oxide, a metal oxide such as titanium oxide, zinc oxide and cesium oxide is used, and (C) titanium oxide or zinc oxide is particularly preferably used. The amount of the titanium oxide or zinc oxide used is not particularly limited, but (A) 0.2 to 15 parts by weight may be added to 100 parts by weight of the styrene resin and / or the polycarbonate resin. preferable.

As described above, the composition according to the present invention includes a case in which a flame retardant and a flame retardant auxiliary are not added. A flame retardant and (E) a flame retardant aid are added. As the preferable flame retardant, a halogen-based flame retardant is used for the purpose of satisfying the flame retardant regulations such as UL standards. Representative examples of the halogen-based flame retardant include a chlorine-based flame retardant, a bromine-based flame retardant, and a fluorine-based flame retardant. Among them, the chlorine-based flame retardant and the brominated flame retardant are more preferred, and the brominated flame retardant is most preferred. Used for

Usually, brominated flame retardants include brominated bisphenol type epoxy polymers, polyhalogenated diphenylalkanes, polypentabromobenzyl acrylate, ethylene bistetrabromophthalimide, brominated polycarbonate oligomers, brominated triazine flame retardants, Bromobisphenol A, bis (tribromophenoxy) ethane, tetrabromobisphenol A-bis (2
-Hydroxyethyl ether), tetrabromobisphenol A-bis (2,3-dibromopropyl ether), tetrabromobisphenol A-bis (allyl ether), hexabromocyclododecane, polydibromophenylene oxide, brominated phthalate, etc. Examples of the chlorine-based flame retardant include perchlorocyclopentadecane and chlorinated paraffin.
In the present invention, at least one selected from the group consisting of brominated bisphenol-type epoxy polymers, polyhalogenated diphenylalkanes, ethylenebistetrabromophthalimide, and hexabromocyclododecane of a specific halogen-based flame retardant is preferably used. .

The (D) flame retardant aid used together with (D) to improve the flame retardant effect of the flame retardant includes antimony trioxide, antimony tetroxide, antimony pentoxide, sodium antimonate, metal antimony, In addition to antimony flame retardants such as antimony trichloride and antimony pentachloride, barium metaborate, zirconium oxide, zinc borate, zinc stannate and the like can be mentioned. These flame retardant aids can be used alone or in combination of two or more.

The amount of the flame retardant (D) used in the present invention and the amount of the flame retardant auxiliary (E) used at the same time are added in consideration of the required degree of flame retardancy, impact resistance and appearance. The amount is suitably determined, and is preferably 2 to 40 parts by weight and 0 to 10 parts by weight with respect to 100 parts by weight of the resin (A). However, with respect to (D) the flame retardant, 3 to 30 parts by weight is more preferable, and 10 to 25 parts by weight is particularly preferable.
If the added amount of the flame retardant is less than 2 parts by weight, the expected effect of improving the flame retardancy is not so much seen, while if it exceeds 40 parts by weight, the light resistance and impact resistance of the molded article are reduced, and the appearance is also reduced. It tends to be worse. In addition, even if it is within 2 to 40 parts by weight, there is no practical problem, but if it is less than 10 parts by weight, especially if it is less than 3 parts by weight, the degree of the effect of improving the flame retardancy may be slightly lower. On the contrary, when it exceeds 25 parts by weight, especially when it exceeds 30 parts by weight, the light resistance, impact resistance, appearance and the like of the molded product may be slightly lowered. on the other hand,
(E) The addition amount of the flame retardant aid is 1 to 40 parts by weight of the flame retardant based on 100 parts by weight of the resin (A).
Even if it exceeds 0 parts by weight, no improvement in the effect of the auxiliary agent on the flame retardant (D) is observed.

In the present invention, various additives can be used in accordance with various purposes as in the case of the ordinary resin composition, and a styrene-butadiene copolymer elastomer is used for improving the impact resistance of the molded article. Elastomers such as ethylene-propylene copolymer elastomers, talc, calcium carbonate, mica, fillers such as carbon black for the purpose of filling or increasing, carbon fibers, metal fibers, with the expectation of a reinforcing effect on the mechanical strength of molded articles, Reinforcing materials such as organic fibers can be added. In addition, heat stability, an ultraviolet absorber (for example, benzotriazole type, hindered amine type), a plasticizer, an antistatic agent, an antioxidant, a lubricant, a coloring agent, and the like can be appropriately used.

The above-mentioned (A) a light-resistant resin composition comprising a styrene resin and / or a polycarbonate resin and (B) a yellow colorant having ultraviolet discoloration, or (C) titanium oxide or zinc oxide; ) Flame retardants, (E)
The method for preparing the light-resistant resin composition to which the flame-retardant aid is added is not particularly limited, but the necessary components are pre-blended with a tumbler or the like, and then melted using a single-screw or twin-screw extruder. The method of kneading and pelletizing is the most general method, and it is also possible to melt and knead with a kneader, a mixing roll, a Banbury mixer or the like in place of the above extruder to form a pellet.

[0027]

Next, the present invention will be described with reference to examples. (Examples 1 to 9, Comparative Examples 1 to 15) The components and component ratios of the compositions used in each of the examples and comparative examples are as shown in Table 1. These components were dry-blended and biaxially mixed. The mixture was melt-kneaded using an extruder, pelletized, and a test piece for evaluating light resistance and the like was prepared by injection molding. The evaluation results are shown in Table 1.

[Components of Composition] (1) Resin (a) Styrene-based resin (hereinafter “PS”) (high impact polystyrene, molecular weight 200,000, rubber component (2 μm diameter, content 8% by weight) (PS with an asterisk in Example 9 and Comparative Example 11 indicates ABS resin VW-10 manufactured by Ube Saikon Co., Ltd.) (b) Polycarbonate resin ... (Hereinafter “PC”) (Teflon FN2200A, manufactured by Idemitsu Petrochemical Co., Ltd.) (2) Yellow colorant (a) Plast Yellow 8010 "Colorant A") (Dye-based colorant having ultraviolet discoloration / quinoline-based, manufactured by Arimoto Chemical Co., Ltd.) (b) CI = solvent yellow 16 (hereinafter referred to as "colorant B") (Dye-based colorant with ultraviolet discoloration / azo-based) (c) CI = Disperse Yellow 54・ ・ (Hereinafter referred to as “colorant C”) (dye-based colorant having no UV discoloration / quinoline) (d) CI = Pigment Yellow 53 (hereinafter referred to as “colorant D”) (Pigment colorant without UV discoloration / titanium yellow) (e) CI = Pigment Yellow 42 (hereinafter referred to as "colorant E") (Pigment coloration without UV discoloration) (3) Flame retardant (a) Brominated bisphenol-type epoxy polymer (hereinafter "flame retardant P") (Dainippon Ink and Chemicals, EP-13) (b) Poly Halogenated diphenyl alkane ... (hereinafter "Flame retardant Q") (Albemarl, Saytex 8010) (c) Ethylene bistetrabromophthalimide ... (hereinafter "Flame retardant R") (Albemarl) , Saytex BT-93) (d) Hexabromocyclododecane (Hereinafter referred to as "flame retardant S") (Daiichi Kogyo Seiyaku Co., Ltd.) (e) Triphenyl phosphate (hereinafter referred to as "flame retardant T") (Daichi Chemical Co., Ltd.) (f) Decabromodiphenyl ether (hereinafter "flame retardant U") (manac, EB-10WS) (4) Flame retardant aid (a) Antimony trioxide ····· (hereinafter “Sb ₂ O ₃ ”) (particle size 0.5 μm) (5) Light-resistant agent (a) Titanium oxide "TiO ₂ ") (Manufactured by chlorine method. Rutile type. (Particle size: 0.2 to 0.4 μm) (6) UV absorber (a) Tinuvin P (hereinafter “UV-1”) (manufactured by Ciba-Geigy) (Benzotriazole type) (b) SANOL LS770 (hereinafter "UV-2") (Hindered amine type manufactured by Sankyo) (7) Rubber (a) Styrene-butadiene- Styrene copolymer

[Evaluation of Light Resistance, etc.] (1) Light Resistance The color of the obtained test pieces (dimensions: 70 mm × 35 mm × 3 mm) was measured in accordance with JIS K7103 and 7105. That is, using a xenon lamp-type weather meter (Ci 65 manufactured by Atlas), evaluation was performed based on the value of ΔE (color difference) after 0 hour and 300 hours at a black panel temperature of 63 ° C. (Table 1). "ΔE"). ΔE was measured using a spectral colorimeter (manufactured by Nippon Denshoku Industries Co., Ltd.). Measurement conditions (a) Lamp: halogen lamp 12V, 50W (NARV
(B) Wavelength: 400-700 nm (c) Light source: C light source 2 degree field of view (d) Measurement hole: 30 mmφ (e) Measurement object: reflected light (2) Flame retardancy The obtained test piece ( (Dimension 127mm x 13mm x 2mm)
Was evaluated in accordance with the UL-94 standard (Table 1 shows "F
(UL-94) "). (3) General physical properties For the obtained test pieces, the flexural modulus ("Yf
Was designated (MPa) "), Izod impact value (in Table 1," Iz (KJ / m ²⁾ was labeled ") and heat distortion temperature (in Table 1," HDT (° C.) was labeled) To JIS K72
03, K7110 and K7207.

[0030]

[Table 1]

[0031]

[Table 2]

[0032]

[Table 3]

[0033]

As is clear from the above description, (A)
By adding a predetermined amount of (B) a colorant having ultraviolet discoloration to the styrene-based resin and / or the polycarbonate-based resin, the problem of coloring due to ultraviolet irradiation is greatly improved, and (C) titanium oxide of metal oxide is added. Alternatively, it was found that the addition effect of the coloring agent having ultraviolet discoloration (B) was also obtained by adding zinc oxide to the addition of (D) the flame retardant and (E) the flame retardant auxiliary.

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[Procedure amendment]

[Submission date] October 6, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

The (B) yellow colorant having ultraviolet discoloration referred to in the present invention is a colorant which is added to and kneaded with the above-mentioned styrene resin and / or polycarbonate resin, and is easily discolored by irradiation with natural light or ultraviolet light after molding. And a quinoline-based colorant and an azo-based colorant are preferred, and a quinoline-based dye and an azo-based dye are particularly preferred. Specific examples include quinoline-based Solvent Yellow 157 and azo-based Solvent Yellow 16 in color index (CI) display. In comparison with these, quinoline-based Disperse Yellow 54, titanium yellow-based Pigment Yellow 53, yellow iron oxide-based Pigment Yellow 42, and the like do not have ultraviolet discoloration, and therefore, as the yellow colorant according to the present invention, Improper. However, in the present invention, in addition to the (B) yellow colorant having ultraviolet discoloration, a colorant complementary to the yellow colorant (B) or a desired colorant for toning required for the final product Is not excluded, and various known colorants can be toned by computer color matching technology. As the toning colorant, a toning pigment or dye which is non-fading to ultraviolet rays is preferably used.

Continued on the front page (51) Int.Cl. ⁶ Identification code Reference number in the agency FI Technical display location C08K 5/23 KKK C08K 5/23 KKK 5/3412 5/3412 C08L 55/02 LMF C08L 55/02 LMF 69 / 00 LPP 69/00 LPP

Claims (5)

[Claims] 1. A light resistance obtained by blending (B) 0.0001 to 0.2 part by weight of a yellow colorant having ultraviolet discoloration with respect to 100 parts by weight of a styrene resin and / or a polycarbonate resin. Resin composition. 2. The light-resistant resin composition according to claim 1, wherein the yellow colorant having ultraviolet discoloration (B) is a quinoline colorant and / or an azo colorant. 3. The composition according to claim 1, wherein 0.2 to 15 parts by weight of (C) titanium oxide and / or zinc oxide is blended with respect to 100 parts by weight of the styrene resin and / or the polycarbonate resin. Light-resistant resin composition. 4. A group consisting of brominated bisphenol type epoxy polymer, polyhalogenated diphenylalkane, ethylenebistetrabromophthalimide and hexabromocyclododecane per 100 parts by weight of (A) a styrene resin and / or a polycarbonate resin. At least one (D) flame retardant selected from the group consisting of 2 to 40 parts by weight, and (E)
The light-resistant resin composition according to any one of claims 1 to 3, further comprising 0 to 10 parts by weight of a flame retardant aid. 5. A housing for an electric or electronic device product, comprising the light-resistant resin composition according to claim 1 as a molding material.