KR101837822B1 - Ionizing radiation resistant polycarbonate resin composition and article comprising the same - Google Patents
Ionizing radiation resistant polycarbonate resin composition and article comprising the same Download PDFInfo
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- KR101837822B1 KR101837822B1 KR1020160018067A KR20160018067A KR101837822B1 KR 101837822 B1 KR101837822 B1 KR 101837822B1 KR 1020160018067 A KR1020160018067 A KR 1020160018067A KR 20160018067 A KR20160018067 A KR 20160018067A KR 101837822 B1 KR101837822 B1 KR 101837822B1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0041—Optical brightening agents, organic pigments
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/02—Applications for biomedical use
Abstract
The polycarbonate resin composition of the present invention comprises a polycarbonate resin; Polyalkylene glycol compounds; (YI) value of 2 to 4 after irradiated with 25 kGy gamma rays on a 3 mm thick specimen and irradiated with gamma rays measured according to ASTM D1925 after 7 days. The polycarbonate resin composition is excellent in color and impact resistance even after irradiation with ionizing radiation.
Description
The present invention relates to a radiation-resistant polycarbonate resin composition and a molded article containing the same. More particularly, the present invention relates to a radiation-resistant polycarbonate resin composition excellent in color, impact resistance and the like even after irradiation with ionizing radiation and a molded article containing the same.
Polycarbonate resins have excellent mechanical and thermal properties and are used in a wide range of applications. In particular, it has excellent transparency, hygienic properties, rigidity and heat resistance, and is widely used as medical supplies for medical devices, surgical instruments, and surgical instruments. Such medical products are required to be completely sterilized. Examples of such sterilization methods include contact treatment using sterilized gas such as ethylene oxide, heat treatment in an autoclave, ionizing radiation such as gamma ray, electron ray and X- ), And the like. Among them, the contact treatment using ethylene oxide is undesirable because of the toxicity of ethylene oxide itself, instability, and environmental problems due to waste treatment. In addition, the heat treatment in the autoclave may cause deterioration of the resin at the time of high-temperature treatment, has a high energy cost, and has a disadvantage in that moisture is left on the treated parts and drying process is required. Therefore, a sterilization treatment by irradiation with ionizing radiation which can be treated at a low temperature and is relatively economical is usually used.
Generally, when irradiated with ionizing radiation, the polycarbonate resin undergoes yellowing, deterioration of physical properties, and the like. In order to solve this problem, a method of blending other polymers with a polycarbonate resin, a method of adding various additives, or a method of forming a copolymer have been proposed. However, the conventional method has not solved all problems such as occurrence of yellowing and impact resistance.
Therefore, it is required to develop a polycarbonate resin composition excellent in color, impact resistance, and the like, so that the liquid level and the color of the contents such as the chemical solution and the blood inside the molded article can be easily identified even after the irradiation with ionizing radiation.
The background art of the present invention is disclosed in Korean Patent Publication No. 10-2012-0077665.
An object of the present invention is to provide a polycarbonate resin composition excellent in color, impact resistance and the like even after irradiation with ionizing radiation and a molded article containing the same.
The above and other objects of the present invention can be achieved by the present invention described below.
One aspect of the present invention relates to a polycarbonate resin composition. Wherein the polycarbonate resin composition comprises a polycarbonate resin; Polyalkylene glycol compounds; (YI) value of 2 to 4 after irradiated with 25 kGy gamma rays on a 3 mm thick specimen and irradiated with gamma rays measured according to ASTM D1925 after 7 days.
In an embodiment, the organic or inorganic synthetic pigment may include at least one of a phthalocyanine compound and an azo compound.
In an embodiment, the phthalocyanine-based compound may include a compound represented by the following Formula 1:
[Chemical Formula 1]
In Formula 1, M is copper, iron, nickel, cobalt, manganese, aluminum, palladium, tin, lead, titanium, rubidium, terbium, cerium, lanthanum or zinc, R 1, R 2, R 3, R 4, Each of R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 independently represents a hydrogen atom, a halogen atom, Hydrocarbon group.
In an embodiment, the azo-based compound may be an azo lake pigment.
In an embodiment, the content of the polyalkylene glycol compound may be from 0.6 to 5 parts by weight based on 100 parts by weight of the polycarbonate resin, and the content of the organic or inorganic synthetic pigment may be from 0.0001 to 0.05 parts by weight.
In an embodiment, the polycarbonate resin composition may further include an epoxy ester compound represented by the following formula (2).
(2)
Wherein R 17 and R 19 are each independently a hydrocarbon group having 1 to 10 carbon atoms, R 18 and R 20 are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, m and n are 0 or 1, and m + n is 1 or 2. Here, R 17 and R 18 and R 19 and R 20 may be connected to each other to form a ring.
In an embodiment, the content of the epoxy ester compound may be 0.001 to 3 parts by weight based on 100 parts by weight of the polycarbonate resin.
In a specific example, the polycarbonate resin composition was irradiated with a 25 kGy gamma ray to a 3 mm thick specimen, and after 7 days, irradiated with gamma rays measured in accordance with ASTM D2244, the lightness (L * ) value was 80 or more, kGy gamma ray, and after 7 days, the transmittance after gamma irradiation measured according to ASTM D1003 may be more than 80%.
In an embodiment, the polycarbonate resin composition is prepared by irradiating a 3.2 mm thick Izod specimen with a 25 kGy gamma ray and irradiating the irradiated gamma ray after 7 days with the gamma ray measured according to ASTM D256 at 70 to 90 kgf · cm / cm .
Another aspect of the present invention relates to a molded article formed from the polycarbonate resin composition.
In an embodiment, the molded article may be an immuno-radiative medical article.
INDUSTRIAL APPLICABILITY The present invention has an effect of providing a polycarbonate resin composition excellent in color, impact resistance, and the like and a molded article containing the same, even after irradiation with ionizing radiation.
Hereinafter, the present invention will be described in detail.
The polycarbonate resin composition according to the present invention has a resistance to radioactive radiation, and includes polycarbonate resin; Polyalkylene glycol compounds; (YI) value of 2 to 4 after irradiated with 25 kGy gamma rays on a 3 mm thick specimen and irradiated with gamma rays measured according to ASTM D1925 after 7 days.
The polycarbonate resin used in the present invention may be any of polycarbonate resins such as aromatic polycarbonate resins used in conventional polycarbonate resin compositions. The polycarbonate resin may be prepared, for example, by reacting a dihydric phenol compound with phosgene in the presence of a molecular weight modifier and a catalyst according to a conventional method, or by reacting a dihydric phenol compound with diphenyl carbonate Can be prepared using an ester interchange reaction of a carbonate precursor.
In the process for producing such a polycarbonate resin, as the dihydric phenol compound, a bisphenol compound can be used. For example, 2,2-bis (4-hydroxyphenyl) propane (hereinafter referred to as bisphenol A) Can be used. At this time, the bisphenol A may be partially or wholly replaced by other dihydric phenol compounds. Examples of other dihydric phenolic compounds that can be used include hydroquinone, 4,4'-biphenol, bis (4-hydroxyphenyl) methane, 1,1- bis (4- hydroxyphenyl) cyclohexane, Bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide, bis , Halogenated bisphenols such as bis (4-hydroxyphenyl) ketone or bis (4-hydroxyphenyl) ether and 2,2-bis (3,5-dibromo-4-hydroxyphenyl) propane . However, the dihydroxy phenol-based compound usable for the production of the polycarbonate resin is not limited thereto, and any of the dihydroxy phenol-based compounds can be used to produce the polycarbonate resin.
The polycarbonate resin may be a homopolymer using one dihydric phenolic compound or a copolymer using two or more dihydric phenolic compounds or a mixture thereof.
The polycarbonate resin may be in the form of a linear polycarbonate resin, a branched polycarbonate resin, or a polyester carbonate copolymer resin. The polycarbonate resin to be contained in the polycarbonate resin composition of the present invention is not limited to a specific form, and any of these linear polycarbonate resins, branched polycarbonate resins, or polyester carbonate copolymer resins can be used.
As the linear polycarbonate resin, for example, a bisphenol A-based polycarbonate resin can be used. As the branched polycarbonate resin, for example, a polyfunctional aromatic compound such as trimellitic anhydride or trimellitic acid With a dihydroxy phenolic compound and a carbonate precursor can be used. As the polyester carbonate copolymer resin, for example, those prepared by reacting a bifunctional carboxylic acid with a dihydric phenol and a carbonate precursor may be used. In addition, conventional linear polycarbonate resin, branched polycarbonate resin or polyester carbonate copolymer resin can be used without limitation.
In an embodiment, the polycarbonate resin may comprise a terminally modified polycarbonate resin comprising a tert-butylphenoxy end. The terminal-modified polycarbonate resin can be produced according to a conventional polycarbonate resin production method, except that tert-butylphenol is added in the production of polycarbonate resin. In the case of including the terminal-modified polycarbonate resin, the content of the tert-butylphenoxy group in the entire polycarbonate resin may be 0.1 to 80 mol%, for example, 20 to 60 mol%. The radiation resistance, impact resistance, etc. of the polycarbonate resin composition in the above range can be further improved.
In an embodiment, the polycarbonate resin may have a weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) of 10,000 to 200,000 g / mol, for example, 15,000 to 80,000 g / mol.
The polycarbonate resin may have a melt flow index (MI) of 3 to 35 g / 10 min under ISO 1133 standard (300 ° C, 1.2 kg load), but is not limited thereto.
The polyalkylene glycol compounds used in the present invention may include polyalkylene glycols, ethers of polyalkylene glycols, and / or esters of polyalkylene glycols. As the polyalkylene glycol compound, a polyol used in a conventional ionizing radiation composition can be used without limitation, and examples thereof include polyethylene glycol, polyethylene glycol methyl ether, polyethylene glycol dimethyl ether, polyethylene glycol dodecyl ether, polyethylene Polyethylene glycol dibenzyl ether, polyethylene glycol-4-nonylphenyl ether, polypropylene glycol, polypropylene glycol methyl ether, polypropylene glycol dimethyl ether, polypropylene glycol dodecyl ether, polypropylene glycol benzyl ether, polypropylene glycol Glycol dibenzyl ether, polypropylene glycol-4-nonylphenyl ether, polytetramethylene glycol, polyethylene glycol diacetic acid ester, polyethylene glycol acetic acid propionic acid ester, polyethylene glycol dibutyrate ester, polyethylene P-tert-butylbenzoic acid ester, polyethylene glycol dicaprylic acid ester, polypropylene glycol dicarboxylic acid ester, polypropylene glycol dicarboxylic acid ester, polyethylene glycol dibenzoate, polyethylene glycol di- Polypropylene glycol dibutyrate, polypropylene glycol distearate, polypropylene glycol dibenzoate, polypropylene glycol di-2,6-dimethylbenzoate, polypropylene glycol di-p-tert-butyl Benzoic acid ester, polypropylene glycol dicaprylic acid ester, and the like, but the present invention is not limited thereto. These may be used alone or in combination of two or more.
In an embodiment, the polyalkylene glycol compound may have a number average molecular weight (Mn) measured by gel permeation chromatography (GPC) of 1,000 to 5,000 g / mol, for example, 1,500 to 3,000 g / mol, Do not.
In an embodiment, the content of the polyalkylene glycol compound may be 0.6 to 5 parts by weight, for example, 0.9 to 3 parts by weight, based on 100 parts by weight of the polycarbonate resin. A polycarbonate resin composition excellent in color, impact resistance and the like can be obtained even after irradiation with ionizing radiation in the above range.
The organic or inorganic synthetic pigment to be used in the present invention is capable of inhibiting the yellowing phenomenon, and for example, a phthalocyanine compound, an azo compound, a mixture thereof and the like can be used.
In an embodiment, the phthalocyanine compound may include a compound represented by the following formula (1).
[Chemical Formula 1]
In Formula 1, M is copper, iron, nickel, cobalt, manganese, aluminum, palladium, tin, lead, titanium, rubidium, terbium, cerium, lanthanum or zinc, R 1, R 2, R 3, R 4, Each of R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 independently represents a hydrogen atom, a halogen atom, Hydrocarbon group.
Specific examples of the phthalocyanine compound include Pigment Green 7, Pigment Blue 15: 3, Pigment Green 36, and the like, but are not limited thereto .
[Formula 1a]
[Chemical Formula 1b]
In embodiments, the phthalocyanine type compound may be a R 1 to R 16 are R 1 to R 16 and the mixture of the second phthalocyanine compound, hydrogen atoms of the first phthalocyanine-based compound of formula 1 other than hydrogen atom of the formula (I). When the organic or inorganic synthetic pigment is a mixture of the first phthalocyanine compound and the second phthalocyanine compound, the weight ratio of the first phthalocyanine compound and the second phthalocyanine compound is 1: 0.25 to 1: 4, for example, 1: 0.5 to 1: 2, but is not limited thereto.
In an embodiment, the azo-based compound may be an azo lake pigment. For example, Pigment Red 48: 2, Pigment Red 48: 3, Pigment Red 57: 1, and the like can be used, but the present invention is not limited thereto.
In an embodiment, the content of the organic or inorganic synthetic pigment may be 0.0001 to 0.05 parts by weight, for example, 0.001 to 0.01 parts by weight, based on 100 parts by weight of the polycarbonate resin. A polycarbonate resin composition excellent in color, impact resistance and the like can be obtained even after irradiation with ionizing radiation in the above range.
The polycarbonate resin composition according to an embodiment of the present invention may further include an epoxy ester compound, an allyl ether compound, or a combination thereof including an ester group and an epoxy group.
In an embodiment, the epoxy ester compound is capable of improving the resistance to ionizing radiation without deteriorating the hydrolysis resistance. For example, the epoxy ester compound may include a compound represented by the following formula (2).
(2)
Wherein R 17 and R 19 are each independently a hydrocarbon group having 1 to 10 carbon atoms, R 18 and R 20 are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, m and n are 0 or 1, and m + n is 1 or 2. Here, R 17 and R 18 and R 19 and R 20 may be connected to each other to form a ring.
Specific examples of the epoxy ester compound include, but are not limited to, compounds represented by the following general formulas (2a) to (2c).
(2a)
(2b)
[Chemical Formula 2c]
In an embodiment, when the epoxy ester compound is used, the content of the epoxy ester compound may be 0.001 to 3 parts by weight, for example, 0.01 to 2 parts by weight, based on 100 parts by weight of the polycarbonate resin. The color, impact resistance and the like of the polycarbonate resin composition may be excellent even after irradiation with an internal-ionizing radiation in the above range.
The weight ratio of the organic or inorganic synthetic pigment and the epoxy ester compound may be 1: 5 to 1: 100, for example, 1: 8 to 1:40. Within the above range, the color, impact resistance, and the like of the polycarbonate resin composition may be even more excellent even after irradiation with the internal-ionizing radiation in the above range.
Examples of the allyl ether compound include, but are not limited to, trimethylolpropane diallyl ether, pentaerythritol diallyl ether, glycerine diallyl ether, and mixtures thereof.
In an embodiment, when the allyl ether compound is used, the content of the allyl ether compound may be 0.001 to 3 parts by weight, for example, 0.01 to 2 parts by weight, based on 100 parts by weight of the polycarbonate resin. The color of the polycarbonate resin composition may be even more excellent even after the irradiation with the internal-ionizing radiation in the above range.
Other resins may be further added to the polycarbonate resin composition of the present invention so far as the effect of the present invention is not impaired. For example, polyethylene terephthalate, polybutylene terephthalate, polyester polycarbonate and the like can be added, but not limited thereto. When the other resin is used, the content thereof may be 50 parts by weight or less, for example, 1 to 15 parts by weight, based on 100 parts by weight of the polycarbonate resin, but is not limited thereto.
Further, the polycarbonate resin composition may further contain optional additives conventionally used in the resin composition. Examples of the additives include, but are not limited to, fillers, reinforcing agents, stabilizers, colorants, antioxidants, antistatic agents, flow improvers, release agents, and nucleating agents. When the additive is used, the content thereof may be 25 parts by weight or less, for example, 10 parts by weight or less, based on 100 parts by weight of the polycarbonate resin, but is not limited thereto.
The polycarbonate resin composition can be produced by a known method for producing a thermoplastic resin. For example, the constituent components of the present invention and other additives, if necessary, can be melt-extruded using an extruder or the like after mixing them in a conventional manner, and can be produced in the form of pellets. The produced pellets can be produced into various molded articles through various molding methods such as injection molding, extrusion molding, vacuum molding, cast molding and the like.
The polycarbonate resin composition according to the present invention has a yellow index (YI) value of -2 to 4, for example, -1 to 4, after irradiated with gamma rays of 25 kGy to a specimen of 3 mm thickness and irradiated with gamma rays measured according to ASTM D1925 after 7 days 1, specifically from 0 to 0.5. If the yellowness index after gamma irradiation exceeds 4, it may be difficult to identify the liquid level or color of the contents such as the chemical solution and the blood inside the molded article due to yellowing, and there is a fear that the appearance characteristics may be deteriorated. The contents of blood and the like may appear blue.
In a specific example, the polycarbonate resin composition is prepared by irradiating a 3 mm thick specimen with 25 kGy gamma rays and irradiating gamma rays measured according to ASTM D2244 after 7 days to a lightness (L * ) value of 80 or more, 95. ≪ / RTI > The liquid level and the color of the contents such as the chemical solution and the blood inside the molded article can be easily identified within the above range.
In an embodiment, the polycarbonate resin composition may have a transmittance of 80% or more, for example, 80 to 95% after irradiating a 3 mm thick specimen with 25 kGy gamma rays and irradiated with gamma rays measured according to ASTM D1003 after 7 days. The liquid level and the color of the contents such as the chemical solution and the blood inside the molded article can be easily identified within the above range.
In an embodiment, the polycarbonate resin composition is prepared by irradiating a 3.2 mm thick Izod specimen with a 25 kGy gamma ray and irradiating the irradiated gamma ray after 7 days with ASTM D256, the Izod impact strength is 70 to 90 kgf · cm / cm, For example from 75 to 85 kgf cm / cm.
The molded article according to the present invention can be produced (formed) from the above-described radiation-resistant radiation-curable polycarbonate resin composition using a known molding method. Since the molded article is excellent in color and impact resistance even after irradiation with ionizing radiation, it can be used as a packaging part in the form of a container for receiving or packaging a syringe, a surgical instrument, a intravenous syringe and a surgical instrument, or an artificial lung, Such as blood centrifuges, surgical instruments, surgical instruments and parts of intravenous syringes, as well as components of medical devices such as venous connectors, hemodialyes, blood filters, safety syringes and their accessories.
Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.
The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.
Example
Hereinafter, polycarbonate resins, polyalkylene glycol compounds, organic and inorganic pigments and epoxy ester compounds used in Examples and Comparative Examples are as follows.
(A) Polycarbonate resin
A weight average molecular weight (Mw) of 28,000 g / mol, a flow index (MI) of 8 g / 10 min (at 300 DEG C under a load of 1.2 kg), polycarbonate resin of bisphenol A type (manufactured by Samsung SDI, product name: SC- Were used.
(B) a polyalkylene glycol compound
Polypropylene glycol (number average molecular weight (Mn): 2,000 g / mol) was used.
(C) Organic and organic pigments
(C1) A compound represented by the following formula (1a) was used.
[Formula 1a]
(C2) A compound represented by the following formula (1b) was used.
[Chemical Formula 1b]
(D) Organic pigment
(D1) M-BLUE-2R from Bayer was used.
(D2) M-Violet-3R from Bayer was used.
(E) Epoxy ester compound
A compound represented by the following formula (2a) was used.
(2a)
Examples 1 to 7 and Comparative Examples 1 to 3: Preparation of polycarbonate resin composition
(A) a polycarbonate resin, (B) a polyalkylene glycol compound, (C) an organic or inorganic synthetic pigment, (D) an organic pigment and (E) an epoxy ester compound, / D = 36 and? = 32 mm at a temperature of 270 占 폚 to prepare a polycarbonate resin composition in the form of a pellet using a pelletizer. The polycarbonate resin composition in the form of pellets was dried in an oven at 120 ° C for 4 hours and injection molded at an extrusion molding machine (manufactured by Dongshin Hydraulic Co., Ltd., DHC 120WD) at a molding temperature of 310 ° C and a mold temperature of 65 ° C to prepare a specimen Respectively. The properties of the prepared specimens were measured by the following methods, and the results are shown in Table 1 below.
Property evaluation method
(1) Yellowness index (YI) after irradiation with gamma ray: The yellow index was measured according to ASTM D1925 after irradiating 25 kGy gamma rays to a 3 mm thick specimen and after 7 days.
(2) after the irradiation intensity (L *): irradiated with 25 kGy gamma radiation to 3 mm thick specimen was measured for lightness (lightness, L *) in accordance with ASTM D2244 after 7 days.
(3) Transmittance after irradiation with gamma ray (unit:%): The 3 mm thick specimen was irradiated with 25 kGy gamma rays and the transmittance was measured according to ASTM D1003 after 7 days.
(4) Izod Impact Strength after Gamma Irradiation (unit: kgf · cm / cm): 3.2 mm thick Izod specimens were irradiated with 25 kGy gamma rays, and after 7 days, Izod impact strength was measured according to ASTM D256.
From the results of Tables 1 and 2, it can be seen that the polycarbonate resin composition of the present invention has excellent color (YI, L * and permeability) and impact resistance even after irradiation with ionizing radiation.
On the other hand, in the case of the comparative example not including the organic / inorganic composite pigment (C) of the present invention, color and impact resistance after irradiation with ionizing radiation were lowered as compared with the Examples, .
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
Polyalkylene glycol compounds; And
Organic and inorganic pigments,
Wherein a 3 mm thick specimen is irradiated with 25 kGy gamma ray and after 7 days, the yellowness index (YI) value measured in accordance with ASTM D1925 is -2 to 4.
[Chemical Formula 1]
In Formula 1, M is copper, iron, nickel, cobalt, manganese, aluminum, palladium, tin, lead, titanium, rubidium, terbium, cerium, lanthanum or zinc, R 1, R 2, R 3, R 4, Each of R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 independently represents a hydrogen atom, a halogen atom, Hydrocarbon group.
(2)
Wherein R 17 and R 19 are each independently a hydrocarbon group having 1 to 10 carbon atoms, R 18 and R 20 are each independently a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, m and n are 0 or 1, and m + n is 1 or 2. Here, R 17 and R 18 and R 19 and R 20 may be connected to each other to form a ring.
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| JP2012207230A (en) * | 2012-07-13 | 2012-10-25 | Mitsubishi Engineering Plastics Corp | Polycarbonate resin composition and medicinal appliance comprising the same |
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