JP2001139812A - Aromatic polysulfone resin composition and its molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide aromatic polysulfone resin compositions having excellent light resistance, and their molded articles. SOLUTION: The aromatic polysulfone resin compositions comprise 100 pts.wt. aromatic polysulfone resin and 0.1-10 pt.wt. organic ultraviolet absorber having a benzotriazole skeleton, and the molded articles are obtained by molding the aromatic polysulfone resin compositions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an aromatic polysulfone resin composition and a molded article thereof. More specifically, the present invention relates to an aromatic polysulfone resin composition containing an organic ultraviolet absorber and a molded product thereof.

[0002]

2. Description of the Related Art Aromatic polysulfone resins are used in a wide range of fields including electric and electronic component materials due to their excellent heat resistance and mechanical properties. It has the disadvantage of poor light resistance and ultraviolet resistance, such as yellow discoloration. In the case of ordinary general-purpose resins and engineering plastics, as a method of improving the light resistance, for example, a method of compounding an organic ultraviolet absorber is common, but in the case of a so-called super engineering plastic such as an aromatic polysulfone resin, Usually, since the processing temperature exceeds 300 ° C., even if a general organic ultraviolet absorber is blended, the absorber is evaporated or decomposed at the time of processing, so that it is extremely difficult to improve the light resistance. It is known. Therefore, as a method of improving the light resistance of the aromatic polysulfone resin, for example, a method of coating the surface of an aromatic polysulfone resin film or fiber with a resin layer containing an ultraviolet absorbent is disclosed in JP-A-6-172566. JP-A-4-2
No. 22,870, and the like. However,
There is a problem that coating with a resin layer is difficult to apply to a molded article having a complicated shape.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aromatic polysulfone resin composition having excellent light resistance and a molded article thereof.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a resin composition containing a specific amount of a specific organic ultraviolet absorber with respect to an aromatic polysulfone resin achieves the above object. This has led to the present invention. That is, the present invention provides (1). Aromatic polysulfone resin 10
The present invention relates to an aromatic polysulfone resin composition containing 0.1 to 10 parts by weight of an organic ultraviolet absorber having a benzotriazole skeleton with respect to 0 parts by weight. Further, the present invention provides (2). The present invention relates to a molded article using the aromatic polysulfone resin composition according to the above (1).

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, the aromatic polysulfone resin is a polyarylene compound in which an arylene unit, an ether bond and a sulfone bond are essential repeating structural units, and the arylene unit is located randomly or orderly together with the ether and the sulfone bond. It is.

The aromatic polysulfone resin used in the present invention usually has the following structural unit (I).

Embedded image [In formula (I), R ¹ represents an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 3 to 10 carbon atoms, a phenyl group or a halogen atom, and p independently represents a number of 0 to 4. Each R ¹ on the same or different nuclei may be different from each other. The ratio of the structural unit (I) to all the structural units is usually 30 mol% or more, preferably 50 mol% or more, more preferably 80 mol% or more from the viewpoint of heat resistance, mechanical properties and the like. More preferably, all the structural units are the above structural units (I).

Further, as the structural unit (I), p is preferably 0, that is, the following structural unit (Ia) is preferable from the viewpoint of heat resistance, mechanical properties and the like.

Embedded image

The aromatic polysulfone resin used in the present invention may have the following structural unit (II) or (III).

Embedded image [In the formula (II), the definitions of R ¹ and p are the same as those in the formula (I), and X represents an organic group having 1 to 20 carbon atoms, a carbonyl group, a divalent sulfur atom or an oxygen atom. . ]

Embedded image [In the formula (III), the definitions of R ¹ and p are the same as those in the formula (I), and q represents a number of 1 to 3. ]

When the aromatic polysulfone resin has the above structural units (I) and (II), (I) / (II)
Is usually 0.5 to 50. In addition, when it has the above structural units (I) and (III), (I) /
The molar ratio of (III) is usually from 1.0 to 20.

Examples of the structural unit (II) include the following structural units (IIa) to (IIe).

Embedded image

Examples of the structural unit (III) include the following structural units (IIIa) and (IIIb).

Embedded image

The terminal structure of the aromatic polysulfone resin used in the present invention is, for example, -Cl, -OH, -OM.
(M is a metal atom such as an alkali metal) or -OR (R is an alkyl group). The type and ratio of the terminal structure can be appropriately adjusted depending on the production conditions of the aromatic polysulfone resin and the like.

As a method for producing the aromatic polysulfone resin used in the present invention, a known method can be employed. Examples of commercially available aromatic polysulfone resins include Sumika Excel PE, a trade name of Sumitomo Chemical Co., Ltd.
S3600P, 4100P, 4800P, 5200P,
5003P, etc., are represented by the structural units (Ia) and (II)
a) AMOCO's trade name UD
ELP-1700, and the like.

The organic ultraviolet absorber used in the present invention is an organic ultraviolet absorber having a benzotriazole skeleton, which generally absorbs ultraviolet light having a wavelength of 300 to 400 nm and emits its energy mainly as harmless heat energy. It is. Specifically, for example, 2- (2H-benzotriazol-2-yl) -p-cresol, 2-
(2H-benzotriazol-2-yl) -4- (1,
(1,3,3-tetramethylbutyl) phenol, 2-
(2H-benzotriazol-2-yl) -4,6-bis (1-methyl-1-phenylethyl) phenol, 2
-Benzotriazol-2-yl-4,6-di-ter
t-butylphenol, 2- [5-chloro (2H) -benzotriazol-2-yl] -4-methyl-6- (t
tert-butyl) phenol, 2,4-di-tert-
Butyl-6- (5-chlorobenzotriazol-2-yl) phenol, 2- (2H-benzotriazol-2)
-Yl) -4,6-di-tert-pentylphenol and the like, and if necessary, two or more of them can be used.

Examples of commercially available organic ultraviolet absorbers having a benzotriazole skeleton include 2- (2H-benzotriazol-2-yl) -p-cresol, and Tinuvin (trade name of Ciba Specialty Chemicals Co., Ltd.). Examples of P, 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol include Tinuvin 329, 2- (2H, trade name of Ciba Specialty Chemicals Co., Ltd. -Benzotriazol-2-yl) -4,6-bis (1-methyl-
Examples of 1-phenylethyl) phenol include Tinuvin 23 (trade name of Ciba Specialty Chemicals Co., Ltd.)
4 and the like.

The amount of the organic ultraviolet absorber having a benzotriazole skeleton used is 100 parts of an aromatic polysulfone resin.
It is 0.1 part by weight or more, preferably 0.5 part by weight or more from the viewpoint of light resistance, and 10 parts by weight or less, preferably 5 parts by weight or less from the viewpoint of heat resistance.

The aromatic polysulfone composition of the present invention comprises:
If necessary, an inorganic filler may be contained for the purpose of improving mechanical properties and the like. Examples of the inorganic filler include glass fiber, silica alumina fiber, wollastonite, fibrous or acicular reinforcing materials such as potassium titanate whiskers, calcium carbonate, dolomite, talc, mica, clay, glass beads, and the like. If necessary, two or more of them can be used. Among them, glass fibers are preferred. The amount of the inorganic filler used is usually 1 part by weight or more, preferably 10 parts by weight or more from the viewpoint of the reinforcing effect, and is usually 100 parts by weight from the viewpoint of moldability, based on 100 parts by weight of the aromatic polysulfone resin. Below, preferably 7
0 parts by weight or less

The aromatic polysulfone resin composition of the present invention may further comprise a polyamide, polyester,
Thermoplastic resins such as polyphenylene sulfide, polyether ketone, polycarbonate, polyphenylene ether and modified products thereof, polyether sulfone, polyether imide, liquid crystal polyester resin; thermosetting resins such as phenol resin, epoxy resin, polyimide resin May be contained.

The aromatic polysulfone resin composition of the present invention may further comprise a coloring agent such as a dye or a pigment, if necessary.
One or more additives such as an antioxidant, a heat stabilizer, an antistatic agent, and a surfactant may be contained.

As a means for compounding each component of the aromatic polysulfone resin composition of the present invention, an aromatic polysulfone resin, an organic ultraviolet absorber, and if necessary, an inorganic filler and the like are used.
It is common to mix using a Henschel mixer, a tumbler or the like, and then melt-knead using an extruder.

The aromatic polysulfone resin composition of the present invention can be formed into various parts and members by a usual method. Examples of the molding method include an injection molding method, a compression molding method, an extrusion molding method, and a hollow molding method. As molded articles, for example, VTR, TV, iron, air conditioner, stereo, vacuum cleaner, refrigerator, rice cooker, lighting equipment,
Home appliance parts such as lamps; lighting equipment parts such as lamp reflectors, lamp holders, sockets, and insulators; sound product parts such as compact discs, laser discs, speakers, etc .; communication equipment parts such as telephone parts, facsimile parts, and modems ; Copier related parts such as heater holders;
Automotive parts such as interior parts; aircraft parts, spacecraft parts, marine facilities parts, optical equipment parts, valves, pipes, nozzles, filters, membranes, medical equipment parts and materials, sensors, sanitary parts Equipment, sports equipment,
Leisure goods, films, sheets, and the like.

Above all, light fixture parts are required to have light resistance and heat resistance, and the requirements are becoming higher as the parts become smaller and more complex. Therefore, the aromatic polysulfone resin composition of the present invention, which has the heat resistance of the aromatic polysulfone resin itself and is excellent in light resistance, is suitably used for lighting equipment parts such as sockets and insulator parts.

[0023]

EXAMPLES Examples of the present invention will be shown below, but the present invention is not limited to these examples. Examples 1, 2, 3 and Comparative Example 1 The following components were mixed with a composition (parts by weight) shown in Table 1 using a Henschel mixer, and then twin-screw extruder (Ikekai Iron Works Co., Ltd.)
Cylinder temperature 340 ° C using PCM-30
To obtain a resin composition. -Aromatic polysulfone resin: a polyether sulfone resin composed of the above structural unit (Ia) and having a terminal structure of -Cl type [Sumitomo Chemical Co., Ltd., trade name: Sumika Excel PES4100P]-Organic ultraviolet absorber-1: 2- (2H-benzotriazol-2-yl) -p-cresol [manufactured by Ciba Specialty Chemicals Co., Ltd., trade name: Tinuvin P] Organic UV absorber-2: 2- (2H-benzotriazol-2-yl) ) -4- (1,1,3,3-tetramethylbutyl) phenol [Ciba Specialty Chemicals Co., Ltd., trade name: Tinuvin 329] Organic UV absorber-3: 2- (2H-benzotriazole-2) -Yl) -4,6-bis (1-methyl-1-phenylethyl) phenol [trade name, manufactured by Ciba Specialty Chemicals Co., Ltd.] Tinuvin 234] Pigment: Titanium oxide [manufactured by Ishihara Sangyo Kaisha Ltd., trade name: TIPAQUE CR-60] obtained resin composition an injection molding machine [Sumitomo Heavy Industries Kogyo Co., Ltd., Neomat N110 / 4
5], film gate type 64 mm x 64 mm, 1 mm
Molding was performed at 360 ° C. using a thick plate mold to obtain a plate-shaped test piece. The obtained plate-shaped test piece was subjected to a strong energy xenon weather meter [SC manufactured by Suga Test Instruments Co., Ltd.
700-WN], irradiation intensity 150 W / m ² , irradiation time 100 hours, black panel temperature 80 ° C., humidity 5
UV exposure was performed under 0% conditions, and the color tone change (ΔE) before and after UV exposure was measured using a color difference meter [Z-1001DP manufactured by Nippon Denshoku Industries Co., Ltd.]. Table 1 shows the results.

[0024]

[Table 1]

[0025]

The aromatic polysulfone resin composition of the present invention has excellent light resistance and is suitably used for lighting equipment parts such as sockets and insulator parts.

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Claims (5)

[Claims] 1. An aromatic polysulfone resin composition comprising 0.1 to 10 parts by weight of an organic ultraviolet absorber having a benzotriazole skeleton based on 100 parts by weight of an aromatic polysulfone resin. 2. The aromatic polysulfone resin has the following structural unit: ## STR1 ## 2. The aromatic polysulfone resin composition according to claim 1, comprising at least 80 mol%. 3. The composition according to claim 1, wherein the content of the inorganic filler is 1 to 100 parts by weight based on 100 parts by weight of the aromatic polysulfone resin.
Or the aromatic polysulfone resin composition according to 2 above. 4. A molded article comprising the aromatic polysulfone resin composition according to claim 1. 5. A lighting fixture part obtained by molding the aromatic polysulfone resin composition according to claim 1.