JP2015098528A - Aspiration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aspiration device consisting of a resin composition containing 100 pts.wt. of a polycarbonate resin (A), 0.01 to 20 pts.wt. of a specific alkyl ketene dimer (B) and 0.01 to 2 pts.wt. of full ester of pentaerythritol and substituted or unsubstituted aliphatic acid having 12 to 30 carbon atoms (C).SOLUTION: The aspiration device had improved chemical resistance to chemicals such as an antiseptic solution while maintaining performances such as excellent transparency, shock resistance, heat resistance and heat stability which polycarbonate resins originally have and is extremely useful by inhibiting generation of failures such as cracking even when chemicals such as the antiseptic solution adhere to the aspiration device containing the resin composition.

Description

  The present invention relates to an aspirator used in a processing apparatus that sucks and discards liquid waste. More specifically, the present invention relates to, for example, a treatment apparatus that sucks and discards a body fluid of a patient that needs to be discarded at a medical or nursing care site, or a waste solution such as a physiological saline or a disinfectant used for cleaning the affected area. The present invention relates to an aspirator made of polycarbonate resin that is excellent in various properties such as transparency, impact resistance, heat resistance, and chemical resistance against chemicals such as disinfectants.

In general, aspirators for aspirating body fluids such as sputum, nasal discharge, and blood are widely used in medical settings. As these aspirators, those used for collecting waste such as body fluids, disposal and incineration are known (Patent Document 1).
Conventional suction devices made of glass with good visibility have been widely used, but glass suction devices can break due to unforeseen collisions and drops on site, and there is a strong demand for weight reduction. An alternative to resin is desired, and an increasing number of cases where polycarbonate resin, which is a thermoplastic resin excellent in transparency, impact resistance, heat resistance and the like, is used instead of glass. In particular, in the case of aspirators used at medical sites and nursing care sites, body fluids may be infected with viruses or pathogens, and sterilization and cleaning are frequently performed with various disinfectants and other chemicals. There are also cases where

  However, if strong chemicals such as disinfectant solution adhere to the polycarbonate resin molded product, defects such as cracks may occur from the attached part, and chemical resistance, especially disinfectant solution etc. There is a demand for a polycarbonate resin having excellent chemical resistance to chemicals.

So far, a resin composition in which a polyester resin is blended with a polycarbonate resin has been proposed for the purpose of improving the above-mentioned problems. However, by blending polyester resin,
(1) Although the solvent resistance against general detergents and cleaning agents is slightly improved, the effect of improving the chemical resistance against chemicals such as disinfectant is not sufficient,
(2) While greatly reducing the transparency, which is an advantage of polycarbonate resin,
(3) The impact resistance of the polycarbonate resin is impaired.
There was a problem.

  Furthermore, a method of blending an impact resistance improving material such as MBS with a resin composition comprising a polycarbonate resin and a polyester resin has been proposed in order to improve the impact strength among the above problems (Patent Document 2). However, there is a problem that coloring due to MBS and a problem that the polyester resin decomposes due to transesterification occur, and further improvement is expected.

Japanese Patent Laid-Open No. 7-60231 Japanese Patent Publication No.55-9435

  An object of the present invention is to provide an aspirator made of polycarbonate resin that has excellent chemical resistance against chemicals such as disinfectants while maintaining the transparency, impact, heat resistance, thermal stability, etc. inherent to the polycarbonate resin. And

  As a result of intensive studies in view of such conventional problems, the present inventors have found that a full ester of a specific alkyl ketene dimer, pentaerythritol, and a saturated or unsaturated fatty acid having 12 to 30 carbon atoms in the polycarbonate resin. Surprisingly, the polycarbonate resin has excellent chemical resistance against chemicals such as disinfectants, in addition to the excellent transparency, impact resistance, heat resistance, thermal stability, and other properties inherent to polycarbonate resins. As a result, the present invention has been completed.

That is, the present invention relates to 100 parts by weight of the polycarbonate resin (A), 0.01 to 20 parts by weight of the alkyl ketene dimer (B) represented by the following general formula 1, and pentaerythritol and saturated or unsaturated having 12 to 30 carbon atoms. The present invention provides an aspirator comprising a resin composition containing 0.01 to 2 parts by weight of a full ester (C) with a fatty acid.
General formula 1:

（一般式１において、Ｒは、同一でも異なっても良いが、炭素数６〜３３のアルキル基をあらわす。）

(In General Formula 1, R may be the same or different, but represents an alkyl group having 6 to 33 carbon atoms.)

  The suction device of the present invention is improved in chemical resistance against chemicals such as disinfectant while maintaining the excellent transparency, impact resistance, heat resistance, thermal stability, etc. inherent to the polycarbonate resin. Even if chemicals such as a disinfectant adhere to a suction device made of such a resin composition, the occurrence of defects such as cracks is suppressed, which is extremely useful.

The aspirator of the present invention refers to various body fluids such as sputum, nasal discharge, blood and urine collected from patients and the like that need to be discarded in the field of medical care and nursing care, physiological saline and disinfectant used for washing the affected area, It means an aspirator used for various inspections of chemicals and the like (hereinafter referred to as body fluids), or an aspirator used for a processing apparatus that sucks and discards the body fluids as waste.
The polycarbonate resin (A) used in the present invention is obtained by a phosgene method in which various dihydroxydiaryl compounds and phosgene are reacted, or a transesterification method in which a dihydroxydiaryl compound and a carbonate such as diphenyl carbonate are reacted. A typical example of the polymer is a polycarbonate resin produced from 2,2-bis (4-hydroxyphenyl) propane (commonly referred to as bisphenol A).

  Examples of the dihydroxydiaryl compound include bisphenol 4-, 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-hydroxyphenyl-3-methylphenyl) propane, 1,1-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 ( Bis (hydroxyaryl) alkanes such as 4-hydroxy-3,5-dichlorophenyl) propane, 1,1- (4-hydroxyphenyl) cyclopentane, bis (hydroxyaryl) cycloalkanes such as 1,1-bis (4-hydroxyphenyl) cyclohexane, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3 Dihydroxy diaryl ethers such as 3,3'-dimethyldiphenyl ether, dihydroxy diaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3 ' Dihydroxy diaryl sulfoxides such as dimethyldiphenyl sulfoxide, dihydroxy diary such as 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone Sulfone, and the like.

  These may be used alone or in combination of two or more. In addition to these, piperazine, dipiperidyl hydroquinone, resorcin, 4,4′-dihydroxydiphenyl, and the like may be used in combination.

  Furthermore, the above dihydroxyaryl compound and a trivalent or higher phenol compound as shown below may be used in combination. Trihydric or higher phenols include phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptene, 2,4,6-dimethyl-2,4,6-tri- (4 -Hydroxyphenyl) -heptane, 1,3,5-tri- (4-hydroxyphenyl) -benzol, 1,1,1-tri- (4-hydroxyphenyl) -ethane and 2,2-bis- [4 4- (4,4'-dihydroxydiphenyl) -cyclohexyl] -propane and the like.

  The viscosity average molecular weight of the polycarbonate resin (A) is not particularly limited, but is usually in the range of 10,000 to 100,000, more preferably 14,000 to 30,000, and even more preferably 16,000 to 26,000 in terms of moldability and strength. Moreover, when manufacturing this polycarbonate resin, a molecular weight modifier, a catalyst, etc. can be used as needed.

The alkyl ketene dimer (B) used in the present invention is a compound represented by the following general formula 1.
General formula 1:

  In general formula 1, R may be the same or different, but an alkyl group having 6 to 33 carbon atoms, preferably an alkyl group having 10 to 21 carbon atoms, and most preferably an alkyl having 14 to 16 carbon atoms in R. It is a group.

  The compounding quantity of an alkyl ketene dimer (B) is 0.01-20 weight part per 100 weight part of polycarbonate resin (A). If it is less than 0.01 parts by weight, the chemical resistance is poor, and if it exceeds 20 parts by weight, granulation processing becomes difficult and it is not possible to obtain pellets of the resin composition. A preferable compounding amount is 0.01 to 10 parts by weight, and more preferably 0.1 to 10 parts by weight.

  As the full ester (C) of pentaerythritol and saturated or unsaturated fatty acid having 12 to 30 carbon atoms used in the present invention, pentaerythritol tetrastearate, pentaerythritol tetrapalmitate, pentaerythritol tetrabehenate Etc. These can be used alone or in combination of two or more. Particularly preferred is pentaerythritol tetrastearate.

  The full ester of pentaerythritol and a saturated or unsaturated fatty acid having 12 to 30 carbon atoms is 0.01 to 2 parts by weight per 100 parts by weight of the polycarbonate resin (A). If the amount is less than 0.01 parts by weight, the chemical resistance is poor, and if it exceeds 2 parts by weight, the material slips in the cylinder during the injection molding process, which makes it extremely difficult to form. Preferably it is 0.1-1.5 weight part, Most preferably, it is 0.3-1.0 weight part.

  Examples of the chemicals that can be applied to the polycarbonate resin composition obtained by the present invention and molded articles and sheets thereof include alkylpolyaminoethylglycine-based disinfectants classified as amphoteric surfactants. These are marketed under trade names such as Tego 51 (manufactured by Alfresa Pharma), Alkyd, Usnon, LAG, Kinsar G, Conknol, Satinidine, Nissan Anon, Hygiel, Hyperl, Pearl, Hisushi Punch. High chemical resistance to chemicals against these disinfectants.

  There are no particular restrictions on the method of blending the various blending components (A), (B), and (C) of the present invention, and these can be mixed with any mixer such as a tumbler, ribbon blender, high-speed mixer, etc. It can be melt-kneaded with a screw or twin screw extruder. Moreover, there is no restriction | limiting in particular also about the mixing | blending order of these compounding components, collective mixing, and division | segmentation mixing.

  In addition, other known additives such as mold release agents, UV absorbers, antistatic agents, dyes and pigments, spreading agents (epoxy soybean oil, liquid paraffin, etc.) and reinforcing materials (glass fibers) may be used at the time of mixing. , Carbon fiber, talc, mica, etc.) and other resins can be blended.

  Examples of the molding method for the suction device of the present invention include blow molding and injection molding. In some cases, injection molding is performed using a mold capable of simultaneously molding several suction devices. The molding temperature is preferably 260 to 290 ° C. from the viewpoint of molding processability.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Parts and% are based on weight unless otherwise specified.

The compounding components used are as follows.
Polycarbonate resin (A):
Polycarbonate resin synthesized from bisphenol A and phosgene (Caliber 200-20 manufactured by Sumika Stylon Polycarbonate Co., Ltd.)
Viscosity average molecular weight: 19000, hereinafter abbreviated as PC)
Alkyl ketene dimer (B):
AKD1840 (hereinafter abbreviated as AKD) manufactured by Eiheng Chemical Company
The ingredients are as follows:

上記一般式でＲは炭素数が１５〜１８のアルキル基であるアルキルケテンダイマー。

R is an alkyl ketene dimer in which R is an alkyl group having 15 to 18 carbon atoms.

Full ester (C) of pentaerythritol and saturated or unsaturated fatty acid having 12 to 30 carbon atoms:
Roxyol VPG861 (hereinafter abbreviated as PETS) manufactured by Cognis was used.
Polybutyl terephthalate resin:
600FP manufactured by Polyplastics (hereinafter abbreviated as PBT)

  The above-mentioned various blending components are collectively put into a tumbler at the blending ratios shown in Tables 1 and 2, and after dry mixing for 10 minutes, using a twin-screw extruder (Kobe Steel KTX37), a melting temperature of 280 ° C. To obtain pellets of polycarbonate resin composition.

(Evaluation of chemical resistance)
The pellets of the various resin compositions obtained above were each dried at 125 ° C. for 4 hours, and then set using an injection molding machine (Japan Steel Works J-100E-C5) at a set temperature of 280 ° C. and an injection pressure of 1600 kg / cm ^2. A test piece (127 × 13 × 3.2 mm) was prepared.
The obtained test piece was subjected to arbitrary distortion using a cantilever chemical resistance test jig (see the following formula), and the following evaluation chemicals were respectively applied to the center of the test piece.
Evaluation chemical (disinfectant)
A 10-fold diluted solution (Tego 51: Purified water = 600 ml: 6000 ml) was prepared with purified water manufactured by Alfresa Pharma Co., Ltd. (see below for details). Abbreviation).

Tego 51: Alkyldiaminoethylglycine hydrochloride:
Formula _{[RNH · CH 2 · CH 2} · NH · CH 2 · CH 2 · NH · CH 2 · COOH] · HCl (R is _{C 8 H 17 ~C 16 H 33} , mainly _C 12 _{H 25} and _C 14 _{H 29} Consist of)
The test piece after the chemical application was allowed to stand for 48 hours in an atmosphere at 23 ° C., and the critical strain (%) was determined from the position of cracks and cracks on the test piece according to the following formula.

(formula)

From the critical strain determined by the above formula, the chemical resistance was determined according to the following criteria, and a critical strain of more than 0.7% (◯ to と し た) was considered acceptable.
Determination of chemical resistance:
◎: Critical strain is 1.0% or more ○: Critical strain is 0.7% or more to less than 1.0% △: Critical strain is 0.5% or more to less than 0.7% ×: Critical strain is 0.3 % Or more to less than 0.5% XX: Critical strain is less than 0.3%

(Evaluation of notched Charpy impact strength and deflection temperature under load)
The pellets of the various resin compositions obtained above were each dried at 125 ° C. for 4 hours, and then set using an injection molding machine (Japan Steel Works J-100E-C5) at a set temperature of 280 ° C. and an injection pressure of 1600 kg / cm ^2. A test piece in accordance with the ISO test method was prepared using the obtained test piece, and the Charpy impact strength with notch and the deflection temperature under load were measured in accordance with ISO 179-1 and ISO 75-2. An impact strength of 10 KJ / m ² or more and a deflection temperature under load of 105 ° C. or more were regarded as acceptable.

(Evaluation of transparency)
The pellets of the various resin compositions obtained above were each dried at 125 ° C. for 4 hours, and then set using an injection molding machine (Japan Steel Works J-100E-C5) at a set temperature of 280 ° C. and an injection pressure of 1600 kg / cm ^2. A test piece for transparency evaluation (150 × 90 × 3.0 mm) was prepared.
Using the obtained test piece, the light transmittance of a test piece thickness of 3 mm was measured according to JIS K 7361, and the light transmittance was determined to be 80% or more.

  As shown in Examples 1 to 4, when the constituent requirements of the present invention were satisfied, good results were exhibited over each of transparency, chemical resistance, impact strength, and heat resistance.

On the other hand, as shown in Comparative Examples 1 to 5, in the case where the constituent requirements of the present invention were not satisfied, each case had some drawbacks.
In Comparative Examples 1 and 2, the alkyl ketene dimer was not added, and the case was less than the range defined by the present invention, and the chemical resistance was poor.
In Comparative Example 3, the number of alkyl ketene dimers was larger than the range defined by the present invention, so that pellets could not be produced due to difficulty in granulation.
Comparative Example 4 was a case where the full ester of pentaerythritol and a saturated or unsaturated fatty acid having 12 to 30 carbon atoms was less than the range defined by the present invention, and was inferior in chemical resistance.
Comparative Example 5 is a case where a polyester resin which has been proposed for the purpose of improving chemical resistance and solvent resistance has been blended, and was inferior in transparency, impact resistance, heat resistance and chemical resistance.

Claims (5)

100 parts by weight of polycarbonate resin (A), 0.01 to 20 parts by weight of alkyl ketene dimer (B) represented by the following general formula 1, and full ester of pentaerythritol and saturated or unsaturated fatty acid having 12 to 30 carbon atoms ( An aspirator comprising a composition containing 0.01 to 2 parts by weight of C).
General formula 1:

(In General Formula 1, R may be the same or different, but represents an alkyl group having 6 to 33 carbon atoms.)   The aspirator according to claim 1, wherein the alkyl ketene dimer (B) is an alkyl group having 10 to 21 carbon atoms in R represented by the general formula 1.   The aspirator according to claim 1, wherein the compounding amount of the alkyl ketene dimer (B) is 0.03 to 5 parts by weight per 100 parts by weight of the polycarbonate resin (A).   The aspirator according to claim 1, wherein the full ester of pentaerythritol and a saturated or unsaturated fatty acid having 12 to 30 carbon atoms is pentaerythritol tetrastearate.   The suction device according to claim 1, wherein a light transmittance in accordance with JIS K7361 of a 3 mm thick molded piece injection-molded from the resin composition is 80% or more.