JP2001072851A - Polycarbonate resin composition resistant to ionizing radiation and polycarbonate resin composition for member of medical treatment appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polycarobnate resin composition composed of polycarbonate resin and a specific triazine-based compound in respective specific amounts, hardly causing deterioration in physical properties and a color tone change due to ionizing radiation, and useful for medical treatment products, members of medical treatment appliances, etc. SOLUTION: This composition comprises (A) 100 pts.wt. of polycarbonate resin and (B) 0.001-20 pts.wt. of a triazine-based compound (e.g. 2,4,6- trimethoxy-1,3,5-triazine or the like) of the formula (R1 is H, or a 1-18C hydrocarbon; R2 and R3 and each a 1-18C hydrocarbon; X1 to X3 are each O or S). The ingredient A is preferably synthesized from 2,2-bis(4-hydroxyphenyl)propane and has a viscosity average molecular weight of preferably 10,000-100,000. The composition may also contain 0.001-15 pts.wt. of another stabilizer (e.g. polypropylene glycol or the like) against ionizing radiation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polycarbonate resin composition comprising a polycarbonate resin and a specific triazine compound, and a polycarbonate resin composition for a member of a medical device. More specifically, the present invention relates to a polycarbonate resin composition stabilized against ionizing radiation used for sterilization treatment of a medical instrument and a polycarbonate resin composition for a member of a medical instrument.

[0002]

2. Description of the Related Art Polycarbonate resin has mechanical strength,
It is widely used as a thermoplastic resin with excellent transparency, heat resistance and impact resistance. Due to such excellent properties, the resin is particularly suitable for containing and packaging syringes, surgical tools, surgical instruments, etc., artificial lungs, artificial kidneys, anesthesia absorbing devices,
It is used as a member of various medical instruments such as intravenous connectors and accessories, medical devices such as blood separation devices, surgical tools, and surgical tools.

[0003] In these medical applications, complete sterilization is usually performed. Examples of the sterilization treatment include an ethylene oxide gas contact treatment, a high-temperature and wet heat treatment using high-pressure steam in an autoclave, and a treatment of ionizing radiation such as γ-ray and electron beam. Among them, the ethylene oxide method is not preferred because it has problems of safety of the gas itself, toxicity (especially carcinogenicity, etc.), problems of residual gas in the medical device to be treated, and environmental problems related to disposal. The steam sterilization method has problems such as deformation of the material due to high temperature and humidity heat treatment, deterioration due to hydrolysis, and high processing cost, and further requires a drying step after the sterilization treatment. On the other hand, the ionizing radiation treatment method has the advantages that there is no problem of remaining in the product, the treatment can be performed in a dry state at a low temperature, the treatment cost is relatively low, and the like. Since it can be sterilized, it has been widely used.

However, when the polycarbonate resin is irradiated with such ionizing radiation, the polycarbonate resin changes its color to yellow with a chemical change. This discoloration significantly impairs commercial value, such as the inability to see the correct color tone of the contents in medical applications.

Various attempts have been made to prevent such yellowing. For example, there is known a method of adding a bluish colorant to a resin to cancel the yellow tint. However, in such a method, although the yellow tint can be eliminated by the amount of the coloring agent added, the color becomes darker as a whole, and the commercial value is also impaired.

A method of adding a polyether polyol or an alkyl ether thereof is also known (Japanese Patent Application Laid-Open No. 62-135556). Such a method provides some improvement but is still insufficient, and there is a problem that the addition of the compound easily causes decomposition of the polycarbonate resin and burns during molding.

Further, a method of adding an aromatic halogen compound has been disclosed (JP-A-2-129261). This method gives a rather good stabilizing effect on the polycarbonate resin, but it is a halogen compound,
There is the problem that environmental issues related to safety and disposal cannot be avoided.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a polycarbonate resin composition which causes little deterioration in physical properties and has a very small yellowing upon ionizing radiation sterilization, and a polycarbonate resin composition for a member of a medical instrument. It is in. The inventor of the present invention has conducted intensive studies to achieve such an object, and as a result, found that yellowing during ionizing radiation sterilization can be significantly reduced by adding a specific triazine compound to a polycarbonate resin. Reached the present invention.

[0009]

That is, according to the present invention, 100 parts by weight of a polycarbonate resin and 0.001 to 20 of a triazine compound represented by the following formula (1):
An ionizing radiation stabilized polycarbonate resin composition comprising parts by weight is provided.

[0010]

Embedded image

(Wherein R ¹ is a hydrogen atom or a group having 1 to 1 carbon atoms)
A hydrocarbon group of 18; R ² and R ³ may be the same or different; a hydrocarbon group of 1 to 18 carbon atoms; and X ¹ , X ² and X ³ may be the same or different , An oxygen atom or a sulfur atom. )

The polycarbonate resin used in the present invention includes various aromatic dihydroxy compounds or an interfacial polycondensation method in which a small amount of the polyhydroxy compound is reacted with phosgene, or a diphenyl carbonate or the like. It is a polymer or copolymer of an optionally branched thermoplastic aromatic polycarbonate synthesized by a melt polymerization method of reacting with a carbonate ester. A typical example is 2,2-bis (4
-Hydroxyphenyl) propane (bisphenol A)
And polycarbonate synthesized from the following.

The aromatic dihydroxy compound includes:
Bisphenol A, bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) butane,
2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2
-Bis (4-hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxy-3-tert-butylphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (4
-Hydroxy-3,5-dibromophenyl) propane,
2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane, 2,2-bis (4-hydroxy-3,
5-dimethylphenyl) propane, 2,2-bis (3-
Phenyl-4-hydroxyphenyl) propane, 2,2
-Bis (3-cyclohexyl-4-hydroxyphenyl) propane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, bis (4-hydroxyphenyl) diphenylmethane, 9,9-bis (4-hydroxyphenyl) ) Fluorene, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-
Bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 1,1-bis (4-hydroxyphenyl) cyclopentane, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxy-3 , 3'-
Dimethyldiphenyl ether, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-diphenyl sulfide, 4, 4'-dihydroxy-3,3'-
Diphenyl sulfoxide, 4,4'-dihydroxy-
3,3'-diphenylsulfone, 1,3-bis {2-
(4-hydroxyphenyl) propyl @ benzene, 1,
4-bis {2- (4-hydroxyphenyl) propyl}
Benzene, hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl and the like;
Is preferably used. These compounds can be used alone or in combination of two or more.

In order to obtain a branched aromatic polycarbonate resin, phloroglysin, 2,6-dimethyl-
2,4,6-tri (4-hydroxyphenyl) -3-heptene, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) -2-heptene, 1,3,5-tri ( 2-hydroxyphenyl) benzol, 1,1,1-
Tri (4-hydroxyphenyl) ethane, 2,6-bis (2-hydroxy-5-methylbenzyl) -4-methylphenol, α, α ′, α ″ -tri (4-hydroxyphenyl) -1,3 , 5-triisopropylbenzene,
3,3-bis (4-hydroxyaryl) oxyindole (isatin bisphenol), 5-chloroisatin bisphenol, 5-bromoisatin bisphenol,
For example, 5,7-dichloroisatin bisphenol may be used.

The reaction by the interfacial polycondensation method is usually a reaction between dihydric phenol and phosgene, and is carried out in the presence of an acid binder and an organic solvent. As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide or an amine compound such as pyridine is used.
As the organic solvent, for example, halogenated hydrocarbons such as methylene chloride and chlorobenzene are used. Further, for promoting the reaction, for example, a catalyst such as a tertiary amine such as triethylamine, tetra-n-butylammonium bromide, or tetra-n-butylphosphonium bromide, a quaternary ammonium compound, or a quaternary phosphonium compound may be used. it can. At that time, the reaction temperature is usually 0 to 40 ° C., the reaction time is preferably about 10 minutes to 5 hours, and the pH during the reaction is preferably maintained at 9 or more.

In such a polymerization reaction, a terminal stopper is usually used. Monofunctional phenols can be used as such a terminal stopper. Monofunctional phenols are commonly used as molecular terminators for molecular weight control, and the resulting polycarbonate resins are capped by groups based on monofunctional phenols, so that Excellent heat stability. Such monofunctional phenols are generally phenols or lower alkyl-substituted phenols, and specific examples include phenol, p-tert-butylphenol, p-cumylphenol and isooctylphenol. Further, as other monofunctional phenols, phenols or benzoic acid chlorides having a long-chain alkyl group or aliphatic polyester group as a substituent, or long-chain alkyl carboxylic acid chlorides can be used.

It is desirable that these terminal stoppers are introduced at least at 5 mol%, preferably at least 10 mol%, based on all terminals of the obtained polycarbonate resin. Or a mixture of two or more.

The reaction by the melt polymerization method is usually a transesterification reaction between a dihydric phenol and a carbonate ester. The dihydric phenol and the carbonate ester are mixed while heating in the presence of an inert gas to form an alcohol. Alternatively, it is carried out by a method of distilling phenol. The reaction temperature varies depending on the boiling point of the produced alcohol or phenol, but is usually in the range of 120 to 350 ° C. In the latter half of the reaction, the pressure of the system is reduced to about 10 to 0.1 Torr to facilitate the distillation of the alcohol or phenol produced. The reaction time is usually about 1 to 4 hours.

Examples of the carbonate ester include an optionally substituted ester such as an aryl group having 6 to 10 carbon atoms, an aralkyl group or an alkyl group having 1 to 4 carbon atoms. Specifically, diphenyl carbonate, ditolyl carbonate, bis (chlorophenyl) carbonate, m-cresyl carbonate, dinaphthyl carbonate, bis (diphenyl) carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate, etc. Is preferred.

A polymerization catalyst can be used to increase the polymerization rate. Examples of the polymerization catalyst include sodium hydroxide, potassium hydroxide, alkali metal compounds such as sodium and potassium salts of dihydric phenol, and water. Alkaline earth metal compounds such as calcium oxide, barium hydroxide and magnesium hydroxide; nitrogen-containing basic compounds such as tetramethylammonium hydroxide, tetraethylammonium hydroxide, trimethylamine and triethylamine; alkoxides of alkali metals and alkaline earth metals Manganese, organic acid salts of alkali metals and alkaline earth metals, zinc compounds, boron compounds, aluminum compounds, silicon compounds, germanium compounds, organic tin compounds, lead compounds, osmium compounds, antimony compounds Compounds, titanium compounds, usually the esterification reaction, such as zirconium compounds, there can be used a catalyst used in the transesterification reaction. The catalyst may be used alone or in combination of two or more. The amount of these polymerization catalysts to be used is preferably 1 × 10 ⁻⁹ to 1 × 10 ^{9 with} respect to 1 mol of the starting dihydric phenol.
^-3 equivalents, more preferably 1 × 10 ^{−8 to} 5 × 10 ⁻⁴ equivalents.

The polycarbonate resin has a viscosity average molecular weight (M) of preferably 10,000 to 100,000, more preferably 11,000 to 45,000, and
000 to 30,000 are particularly preferred. A polycarbonate resin having such a viscosity average molecular weight is preferable because sufficient strength is obtained, the melt fluidity during molding is good, and molding distortion does not occur. The viscosity average molecular weight of 0.7 g of polycarbonate resin in 100 ml of methylene chloride is 2
The specific viscosity (η _sp ) obtained from the solution dissolved at 0 ° C. was obtained by inserting it into the following equation. η _sp /c=[η]+0.45×[η] ² c (where [η]
Is the intrinsic viscosity) [η] = 1.23 × 10 ⁻⁴ M ^0.83 c = 0.7

The triazine compound used in the present invention is a triazine compound represented by the above formula (1), wherein R ¹ is a hydrogen atom or a carbon atom having 1 to 1 carbon atoms.
8, preferably a hydrocarbon group having 2 to 15 carbon atoms, more preferably an alkyl group, an aralkyl group or an aryl group, particularly preferably an aralkyl group, and R ² and R ³
May be the same or different and have 1 to 18 carbon atoms;
Preferably a hydrocarbon group having 2 to 15 carbon atoms, more preferably an alkyl group, an aralkyl group or an aryl group,
Particularly preferred are aralkyl groups, X ¹ , X ² and X
³ may be the same or different and is an oxygen atom or a sulfur atom.

As the triazine compound represented by the above formula (1), specifically, 2,4,6-trimethoxy-
1,3,5-triazine, 2,4,6-trimethylthio-1,3,5-triazine, 2,4,6-triethoxy-1,3,5-triazine, 2,4,6-triethylthio- 1,3,5-triazine, 2,4,6-tripropyloxy-1,3,5-triazine, 2,4,6-triisopropyloxy-1,3,5-triazine, 2,
4,6-tributoxy-1,3,5-triazine, 2,
4,6-triisobutyloxy-1,3,5-triazine, 2,4,6-tri-sec-butoxy-1,3,5
-Triazine, 2,4,6-tri-tert-butoxy-1,3,5-triazine, 2,4,6-tripentyloxy-1,3,5-triazine, 2,4,6-triisopentyl Oxy-1,3,5-triazine, 2,4
6-trineopentyloxy-1,3,5-triazine,

2,4,6-trihexyloxy-1,
3,5-triazine, 2,4,6-trioctyloxy-1,3,5-triazine, 2,4,6-trinonyloxy-1,3,5-triazine, 2,4,6-tridecyl Oxy-1,3,5-triazine, 2,4,6-tridecylthio-1,3,5-triazine, 2,4,6-tridodecyloxy-1,3,5-triazine, 2,4,4
6-tridodecylthio-1,3,5-triazine, 2,
4,6-trihexadecyloxy-1,3,5-triazine, 2,4,6-trioctadecyloxy-1,3,3
5-triazine,

2,4,6-Triphenoxy-1,3,5
-Triazine, 2,4,6-triphenylthio-1,
3,5-triazine, 2,4,6-tris (4-methylphenoxy) -1,3,5-triazine, 2,4,6-
Tris (4-phenylphenoxy) -1,3,5-triazine, 2,4,6-tribenzyloxy-1,3,5
-Triazine, 2,4,6-tribenzylthio-1,
3,5-triazine, 2,4,6-tris (diphenylmethyloxy) -1,3,5-triazine, 2,4,6
-Tris (diphenylmethylthio) -1,3,5-triazine, 2,4,6-tris (4-methylbenzyloxy) -1,3,5-triazine, 2,4,6-tris (4-phenylbenzyl Oxy) -1,3,5-triazine, 2,4,6-tris (4-tert-butylbenzyloxy) -1,3,5-triazine, 2,4,6-
Tris (1-naphthomethyloxy) -1,3,5-triazine, 2,4,6-tris (1-naphthomethylthio)
-1,3,5-triazine, 2,4,6-tris @ 1-
(4-methyl) naphthomethyloxy) -1,3,5-triazine,

2,4-dimethoxy-6-hydroxy-
1,3,5-triazine, 2,4-diethoxy-6-hydroxy-1,3,5-triazine, 2,4-diethylthio-6-hydroxy-1,3,5-triazine,
4-dipropyloxy-6-hydroxy-1,3,5-
Triazine, 2,4-diisopropyloxy-6-hydroxy-1,3,5-triazine, 2,4-dibutyloxy-6-hydroxy-1,3,5-triazine, 2,
4-dihexyloxy-6-hydroxy-1,3,5-
Triazine, 2,4-dioctyloxy-6-hydroxy-1,3,5-triazine, 2,4-didecyloxy-6-hydroxy-1,3,5-triazine, 2,4-triazine
Didodecyloxy-6-hydroxy-1,3,5-triazine, 2,4-dihexadecyloxy-6-hydroxy-1,3,5-triazine, 2,4-dioctadecyloxy-6-hydroxy-1 , 3,5-triazine,

2,4-diphenoxy-6-hydroxy-
1,3,5-triazine, 2,4-diphenylthio-6
-Hydroxy-1,3,5-triazine, 2,4-dibenzyloxy-6-hydroxy-1,3,5-triazine, 2,4-dibenzylthio-6-hydroxy-1,
3,5-triazine, 2,4-bis (diphenylmethyloxy) -6-hydroxy-1,3,5-triazine,
2,4-bis (4-methylbenzyloxy) -6-hydroxy-1,3,5-triazine, 2,4-bis (4-
Phenylbenzyloxy) -6-hydroxy-1,3,3
5-triazine, 2,4-bis (4-tert-butylbenzyloxy) -6-hydroxy-1,3,5-triazine, 2,4-bis (1-naphthomethyloxy) -6
-Hydroxy-1,3,5-triazine and the like.

The compound of the above formula (1) wherein R ¹ is a hydrogen atom and X ¹ is an oxygen atom has a tautomeric relationship with the compound represented by the following formula (2).

[0029]

Embedded image

In the present invention, the triazine compound has an effect of suppressing deterioration of the polycarbonate resin due to irradiation with ionizing radiation, and can be used as an ionizing radiation stabilizer for the polycarbonate resin.

In the present invention, the polycarbonate resin 1
The triazine compound represented by the formula (1) is in the range of 0.001 to 20 parts by weight with respect to 00 parts by weight.
The range is preferably from 01 to 5 parts by weight, more preferably from 0.1 to 3 parts by weight. When the amount is less than 0.001 part by weight, the effect of stabilizing ionizing radiation is insufficient, and when the amount is more than 20 parts by weight, the physical properties of the polycarbonate resin may be impaired or the cost may be disadvantageous. Absent. The triazine compounds can be used alone or as a mixture of two or more.

The triazine compound can be used in combination with other conventionally known stabilizers against ionizing radiation, and the combination may sometimes provide a synergistic stabilizing effect. Examples of such compounds include polyalkylene glycols such as polypropylene glycol, thioether compounds described in JP-A-2-115260, and compounds having a mercapto group described in JP-A-6-166807. JP-A-8-225732, JP-A-8-225733, JP-A-8-225
No. 734, benzyl ethers, ethers having a benzyloxy structure such as benzyl alcohol, alcohol compounds, and sulfur compounds having a benzylthio structure such as benzyl sulfide. The amount of these stabilizers used is 100% of polycarbonate resin.
It is usually used in the range of 0.001 to 15 parts by weight based on part by weight.

[0033] The polycarbonate resin composition of the present invention contains other resin materials, to the extent that the effects of the present invention are not impaired.
For example, polyethylene terephthalate, polybutylene terephthalate, polyester polycarbonate, polyarylate, a polyester of cyclohexane dimethanol with terephthalic acid and / or isophthalic acid, a copolyester of polyethylene terephthalate, or the like can be used as a mixture. Usually, it is used in an amount of 30% by weight or less based on the polycarbonate resin in consideration of the transparency and physical properties of the polycarbonate resin composition.

The polycarbonate resin composition of the present invention contains various additives usually used for polycarbonate resins, for example, higher fatty acids such as stearic acid and palmitic acid for improving the moldability. Glycerin, trimethylolpropane, esters or partial esters with alcohols such as pentaerythritol, release agents such as paraffin, heat stabilizers such as phosphate esters and phosphites, and antioxidants such as hindered phenols, Weather resistance improver, ultraviolet absorber, flame retardant, flame retardant auxiliary, impact resistance improver, antistatic agent, plasticizer, lubricant, compatibilizer, foaming agent,
Reinforcing agents, fillers, coloring agents such as dyes and pigments, and the like can be compounded within a range that does not adversely affect irradiation with ionizing radiation.

The polycarbonate resin composition of the present invention comprises:
Any of commonly used molding methods such as injection molding, extrusion molding, blow molding, compression molding, transfer molding and the like can be applied. Among them, the injection molding method is preferably used, and it cannot be said unconditionally because it varies depending on the type of the polycarbonate resin, the degree of polymerization, the type and the amount of the triazine compound, the type and the amount of other additives, and the like. But usually 26
Molded at 0-350 ° C.

The molded product thus obtained is obtained by electron beam, γ
It has high stability against ionizing radiation such as X-rays, α-rays, neutron rays, and X-rays, and is particularly suitable for members of medical instruments that use γ-rays or electron beams for sterilization.

As members of such medical devices, artificial dialysers (artificial kidney cases and caps), artificial lungs, anesthesia inhalers, venous connectors and accessories, blood centrifuge bowls, surgical tools, operating rooms Utensils, tubes for supplying oxygen to the blood, tube connections, heart probes and syringes,
Examples include surgical tools, operating room instruments, containers for storing intravenous injections, and the like.

[0038]

The present invention will be described in more detail with reference to the following examples, but it should not be construed that the invention is limited thereto. In Examples, parts and percentages are by weight unless otherwise specified.

Examples 1 to 9 Bisphenol A type polycarbonate resin (Panlite L-manufactured by Teijin Chemicals Ltd.)
1225) To 100 parts of the various triazine compounds described in Table 1 were added in the amounts shown in Table 1, and the mixture was melt-extruded at a barrel temperature of 260 to 270 ° C. using a φ30 mm uniaxial vent type extruder to obtain pellets. The pellets were dried in a hot air dryer at 120 ° C. for 5 hours or more, and then injection-molded at a cylinder temperature of 280 to 320 ° C. to form a 2 mm thick transparent test piece. Using this test piece, cobalt 60γ-ray was irradiated in air with 25 kilogray (kGy). The yellowness (ΔYI) before and after irradiation was measured according to JIS K7103. The results are shown in Table 1.

Reference Example 1 A transparent test piece of a polycarbonate resin was prepared in the same manner as in Example 1 except that no triazine compound was used, and the yellowing degree (ΔYI) before and after γ-ray irradiation was prepared using this test piece. I asked. The results are shown in Table 1.

[0041]

[Table 1]

Example 10 Bisphenol A type polycarbonate resin (Panlite L-1 manufactured by Teijin Chemicals Ltd.)
225) To 100 parts of the triazine compound shown in Table 2 was added in the amount shown in Table 2, and a transparent test piece having a thickness of 2 mm prepared in the same manner as in Example 1 was used.
It was irradiated with kilogray (kGy). Yellowness before and after irradiation (Δ
YI) was measured according to JIS K7103. The results are shown in Table 2.

Reference Example 2 A transparent test piece of a polycarbonate resin was prepared in the same manner as in Example 10 except that no triazine compound was used, and the yellowing degree (ΔYI) before and after electron beam irradiation was prepared using this test piece. I asked. The results are shown in Table 2.

[0044]

[Table 2]

[0045]

Industrial Applicability The polycarbonate resin composition of the present invention has little deterioration in physical properties and little change in color tone due to ionizing radiation irradiated for sterilization. Therefore, it is extremely useful for applications such as medical products to be subjected to ionizing radiation treatment and members of medical devices.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Kida 1-2-2 Uchisaiwaicho, Chiyoda-ku, Tokyo F-term in Teijin Chemicals Limited (reference) 4J002 CG011 CG021 CG031 EU186 FD010 FD020 FD036 FD050 FD060 FD070 FD080 FD09 FD100 FD130 FD170 FD320 GB01

Claims (4)

[Claims] 1. 100 parts by weight of a polycarbonate resin and 0.00 of a triazine compound represented by the following formula (1):
An ionizing radiation stabilized polycarbonate resin composition comprising 1 to 20 parts by weight. Embedded image (Wherein, R ¹ is a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms, R ² and R ³ may be the same or different and are a hydrocarbon group having 1 to 18 carbon atoms, and X ¹ , X ²
And X ³ may be the same or different and are an oxygen atom or a sulfur atom. ) 2. 100 parts by weight of a polycarbonate resin and 0.01 of a triazine compound represented by the formula (1)
The ionizing radiation-stabilized polycarbonate resin composition according to claim 1, comprising from 5 to 5 parts by weight. 3. A composition comprising 100 parts by weight of a polycarbonate resin and 0.1 to 0.1 parts by weight of the triazine compound represented by the formula (1).
2. The ionizing radiation stabilized polycarbonate resin composition according to claim 1, comprising 3 parts by weight. 4. 100 parts by weight of a polycarbonate resin and 0.003 parts of the triazine compound represented by the formula (1).
A polycarbonate resin composition for a member of a medical device comprising 1 to 20 parts by weight.