JP2005040397A - Catheter - Google Patents

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JP2005040397A
JP2005040397A JP2003278508A JP2003278508A JP2005040397A JP 2005040397 A JP2005040397 A JP 2005040397A JP 2003278508 A JP2003278508 A JP 2003278508A JP 2003278508 A JP2003278508 A JP 2003278508A JP 2005040397 A JP2005040397 A JP 2005040397A
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vinyl chloride
chloride resin
catheter
plasticizer
weight
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Motoyoshi Tsujimoto
素芳 辻本
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Sumitomo Bakelite Co Ltd
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Sumitomo Bakelite Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a catheter less in flexibility change by volatilization of a plasticizer. <P>SOLUTION: This catheter is formed of soft vinyl chloride resin prepared by blending 20-100 pts.wt. cyclohexane-1,2-dicarboxylic acid based ester expressed by general formula (1), to 100 pts.wt. vinyl chloride resin, wherein, R1, R2 in the formula are each a straight chain or branched alkyl group, and the included carbon number is in a range of 2-12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、消化器系、泌尿器系、循環器系器官などの診断、生命維持、治療等に用いられる各種カテーテルに関するものである。   The present invention relates to various catheters used for diagnosis, life support, treatment, etc. of digestive system, urinary system, circulatory system organ and the like.

カテーテルは、最も一般的なチューブ状医療用具であり経皮的、或いは内視鏡的に血管、消化管、尿道あるいは気管などへ挿入し、生理機能の補助に用いられたり診断や検査及び生理機能のモニタリングや栄養補給、輸血・体液管理等の生命維持や治療用に広く用いられたりする。   A catheter is the most common tube-like medical device and is inserted into a blood vessel, digestive tract, urethra, or trachea percutaneously or endoscopically, and used for assisting physiological functions, diagnosis, examination, and physiological functions. It is widely used for life support and treatment such as monitoring, nutritional supplementation, blood transfusion and fluid management.

ここで、カテーテルの材質は、現在、その成形性、接着性、加工性、耐熱性及び耐キンク性及び低価格性等の観点で、軟質塩化ビニル樹脂製のものが最も一般的である。上記の軟質塩化ビニル樹脂には通常ジ−2−エチルヘキシルフタレート(以下、DEHPと略)が可塑剤として用いられている。   Here, the material of the catheter is currently most commonly made of a soft vinyl chloride resin from the viewpoints of moldability, adhesiveness, workability, heat resistance, kink resistance, and low cost. In the above-mentioned soft vinyl chloride resin, di-2-ethylhexyl phthalate (hereinafter abbreviated as DEHP) is usually used as a plasticizer.

DEHPは各種可塑剤の中で比較的安全であり、40年以上安全に用いられている実績がある。ところが、DEHPのようなフタル酸エステル系可塑剤は揮発性が大きく、柔軟性が変わる場合があるので、より揮発性が小さい可塑剤あるいは揮発した場合にも柔軟性変化が少ないような可塑剤に対するニーズがあった。
カテーテルのような医療用具の場合には、滅菌処理が不可欠である。滅菌処理は、通常エチレンオキサイドガス滅菌処理後に、エチレンオキサイドガスを蒸散させるために40℃〜50℃で1〜2週間程度の加熱蒸散を実施するが、この処理前後で柔軟性の変化があった。また、有効期限(通常2〜3年)満了時に柔軟性の変化があった。加えて、人ではなく一部のげっ歯類において若干の精巣毒性が認められたことを受けて、行政機関からのDEHP系代替可塑剤使用の推奨通知が最近公布された(厚生労働省医薬局安全対策課:2002年10月「ポリ塩化ビニル製の医療用具から溶出する可塑剤(DEHP)について」(平成14年医薬安発第1017001,1017002,1017003号))。
DEHP is relatively safe among various plasticizers and has been used safely for over 40 years. However, since a phthalate ester plasticizer such as DEHP is highly volatile and may change its flexibility, it is suitable for a plasticizer with less volatility or a plasticizer with little change in flexibility even when volatilized. There was a need.
In the case of medical devices such as catheters, sterilization is essential. Sterilization treatment is usually conducted after 40 to 50 ° C. for about 1 to 2 weeks in order to evaporate ethylene oxide gas after ethylene oxide gas sterilization, but there was a change in flexibility before and after this treatment. . Moreover, there was a change in flexibility at the expiration of the expiration date (usually 2 to 3 years). In addition, in response to some testicular toxicity being observed in some rodents rather than humans, a recommendation notification from the government agency regarding the use of DEHP alternative plasticizers was recently promulgated (Ministry of Health, Labor and Welfare Countermeasures section: October 2002 “Plasticizer (DEHP) eluted from medical devices made of polyvinyl chloride” (No. 1017001, 1017002, 1017003, 2002)

これらの状況を受けて、DEHP以外の代替可塑剤を使用した軟質塩化ビニル樹脂が提唱されている。具体的にはトリメリット酸2−エチルヘキシル(TOTM)を可塑剤に用いた軟質塩化ビニル樹脂があるが、やはり可塑剤揮発による柔軟性変化の可能性は否定できない。また、揮発性の少ないポリエステル系可塑剤は通常直鎖の脂肪酸エステルからなり、高分子量ゆえに可塑化効率が悪く、即ち所定の柔軟性、硬度を得るために添加する可塑剤部数が多くなるといった問題点を有している。   In response to these circumstances, soft vinyl chloride resins using alternative plasticizers other than DEHP have been proposed. Specifically, there is a soft vinyl chloride resin using 2-ethylhexyl trimellitic acid (TOTM) as a plasticizer, but the possibility of a change in flexibility due to volatilization of the plasticizer cannot be denied. In addition, polyester plasticizers with low volatility are usually composed of straight-chain fatty acid esters, and are low in plasticizing efficiency due to their high molecular weight, that is, the number of plasticizer parts to be added to obtain a predetermined flexibility and hardness is increased Has a point.

さらに特許文献1や特許文献2記載のようなトリメリット酸トリ−n−アルキルエステル(n−TOTM)やトリグリセリドのような各種可塑剤が提案されてはいるが、可塑化効率、揮発性等の観点で問題点を抱えている。
特開昭63−125261号公報 特開昭63−175056号公報
Furthermore, various plasticizers such as trimellitic acid tri-n-alkyl ester (n-TOTM) and triglyceride as described in Patent Document 1 and Patent Document 2 have been proposed, but plasticization efficiency, volatility, etc. Has a problem in terms of view.
JP 63-125261 A JP 63-175056 A

本発明は、可塑剤揮発による柔軟性変化が少ないカテーテルを提供することである。   It is an object of the present invention to provide a catheter with little change in flexibility due to plasticizer volatilization.

即ち本発明は、塩化ビニル系樹脂100重量部に対して、一般式(1)で示されるシクロヘキサン−1,2−ジカルボン酸系エステル20〜100重量部を配合してなる軟質塩化ビニル樹脂から構成されるカテーテルである。

Figure 2005040397
(ただし、式中R1、R2はそれぞれ直鎖あるいは分岐のアルキル基からなり、含まれる炭素数は2〜12の範囲にある。) That is, the present invention comprises a soft vinyl chloride resin comprising 20 to 100 parts by weight of a cyclohexane-1,2-dicarboxylic acid ester represented by the general formula (1) per 100 parts by weight of a vinyl chloride resin. Catheter.
Figure 2005040397
(However, in the formula, R1 and R2 are each composed of a linear or branched alkyl group, and the number of carbon atoms contained is in the range of 2 to 12.)

本発明のカテーテルは、可塑剤揮発による柔軟性変化が少ないので、加熱蒸散後及び長期保管後でも柔軟性等の品質が安定する。   Since the catheter of the present invention has little change in flexibility due to volatilization of the plasticizer, the quality such as flexibility is stable even after heat transpiration and after long-term storage.

本発明で用いられる塩化ビニル樹脂は、広くCH2−CHClで表される基を有するポリマーすべてを指し、塩化ビニルの単独重合体、エチレン−塩化ビニル共重合体等の塩化ビニルと酢酸ビニルを除く他の重合性モノマーとの共重合体、並びに後塩素化ビニル共重合体等の単独及び共重合体を改質したもの、さらには塩素化ポリエチレン等の構造上塩化ビニル樹脂と類似の塩素化ポリオレフィンを包含する。
また、これら塩化ビニル系樹脂は数平均重合度で300〜7000が好ましく、更には500〜2000の重合度を有していることがより好ましい。これらの塩化ビニル系樹脂を単独又は、二種類以上併用して本発明の塩化ビニル系樹脂組成物における塩化ビニル系樹脂成分とすることはなんら差し支えない。
The vinyl chloride resin used in the present invention refers to all polymers having a group widely represented by CH 2 —CHCl, and excludes vinyl chloride and vinyl acetate such as vinyl chloride homopolymers and ethylene-vinyl chloride copolymers. Copolymers with other polymerizable monomers, homopolymers such as post-chlorinated vinyl copolymers and modified copolymers, and chlorinated polyolefins similar in structure to vinyl chloride resins such as chlorinated polyethylene Is included.
Further, these vinyl chloride resins preferably have a number average polymerization degree of 300 to 7000, and more preferably have a polymerization degree of 500 to 2000. These vinyl chloride resins may be used alone or in combination of two or more to form the vinyl chloride resin component in the vinyl chloride resin composition of the present invention.

本発明に使用する可塑剤は、一般式(1)で示されるシクロヘキサン−1,2−ジカルボン酸系エステルである。   The plasticizer used in the present invention is a cyclohexane-1,2-dicarboxylic acid ester represented by the general formula (1).

Figure 2005040397
(ただし、式中R1、R2はそれぞれ直鎖あるいは分岐のアルキル基からなり、含まれる炭素数は2〜12の範囲にある。)
Figure 2005040397
(However, in the formula, R1 and R2 are each composed of a linear or branched alkyl group, and the number of carbon atoms contained is in the range of 2 to 12.)

これらの可塑剤は、フタル酸エステル系可塑剤において、芳香環部分を水素添加することにより得られる。ジ−2−エチルヘキシルフタレート(DEHP)あるいはフタル酸ジイソノニル(DINP)の芳香環部分を水素添加した構造の化合物等が例示される。特に後者のDINCHは商業的に入手可能である。   These plasticizers can be obtained by hydrogenating an aromatic ring moiety in a phthalate ester plasticizer. Examples thereof include compounds having a structure in which the aromatic ring portion of di-2-ethylhexyl phthalate (DEHP) or diisononyl phthalate (DINP) is hydrogenated. In particular, the latter DINCH is commercially available.

本発明における可塑剤は単独あるいは2種以上の併用で使用でき、特性を損なわない限りエポキシ化植物油のような別種類の可塑剤と併用することも可能である。
シクロヘキサン−1,2−ジカルボン酸系エステルの添加量は、塩化ビニル樹脂100重量部に対して、20〜100重量部、好ましくは30〜80重量部である。添加量が20重量部未満ではカテーテルとしての柔軟性が損なわれる。また100重量部を超えると強度が著しく低下しブリード等をおこしやすくなり好ましくない。
The plasticizer in this invention can be used individually or in combination of 2 or more types, and can also be used together with another kind of plasticizer like an epoxidized vegetable oil, as long as the characteristic is not impaired.
The addition amount of the cyclohexane-1,2-dicarboxylic acid ester is 20 to 100 parts by weight, preferably 30 to 80 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. When the addition amount is less than 20 parts by weight, flexibility as a catheter is impaired. On the other hand, when the amount exceeds 100 parts by weight, the strength is remarkably lowered and bleeding is likely to occur.

本発明では、通常の食品用途、医療用途向け軟質塩化ビニルに用いる安定剤を添加してもなんら問題ない。安定剤としては、バリウム−亜鉛系、カルシウム−亜鉛系安定剤等が挙げられる。ここで安定剤の添加量は、塩化ビニル系樹脂100重量部に対して、1〜10重量部である。安定剤の添加量が1重量部未満ではPVCへの安定剤としての効果が少なく、10重量部を超えて添加しても増量効果が認められない。   In the present invention, there is no problem even if a stabilizer used for soft vinyl chloride for normal food use and medical use is added. Examples of the stabilizer include barium-zinc and calcium-zinc stabilizers. Here, the addition amount of the stabilizer is 1 to 10 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. If the addition amount of the stabilizer is less than 1 part by weight, the effect as a stabilizer to PVC is small, and even if it exceeds 10 parts by weight, the effect of increasing the amount is not recognized.

以下に本発明を実施例によって更に詳細に説明するが、本発明は、これら実施例に限定されるものでない。   Examples The present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

以下に示す実施例及び比較例において配合した成分は、以下の通りである。
・塩化ビニル樹脂:PVC(平均重合度=1300)
・可塑剤1:ジイソノニルシクロヘキサン−1,2−ジカルボキシレート
(DINCH)
・可塑剤2:ジ−2−エチルヘキシルフタレート(DEHP)
・安定剤:Ca−Zn系安定剤
The components blended in the following examples and comparative examples are as follows.
-Vinyl chloride resin: PVC (average degree of polymerization = 1300)
Plasticizer 1: Diisononylcyclohexane-1,2-dicarboxylate
(DINCH)
Plasticizer 2: Di-2-ethylhexyl phthalate (DEHP)
・ Stabilizer: Ca-Zn stabilizer

<実施例1及び比較例1>上記原料を用い、表1に示した配合組成(数字は重量部)で加圧ニーダーを用いて約160℃で混練し、その混練物をロールに通し、シート状にした。
このロールシートは充分に冷却させた後に、ペレタイザーを用いてペレット化した。φ40mm押出機にて170℃で内径2.5mm、外径4mm、長さ50cmのチューブ状成形品を成形した。実施例1及び比較例1とも良好な成形品が得られた。
<Example 1 and Comparative Example 1> Using the above raw materials, the composition shown in Table 1 (numbers are parts by weight) was kneaded at about 160 ° C. using a pressure kneader, the kneaded material was passed through a roll, and a sheet I made it.
The roll sheet was sufficiently cooled and then pelletized using a pelletizer. A tubular molded product having an inner diameter of 2.5 mm, an outer diameter of 4 mm, and a length of 50 cm was formed at 170 ° C. with a φ40 mm extruder. Good molded articles were obtained in both Example 1 and Comparative Example 1.

このチューブをそれぞれ以下のa)〜c)の条件で処理した後に、成形品の押出方向(MD方向)にJIS K6251 7号ダンベルを用いて打ち抜き、テストピースを採取した。試験速度200mm/分で引張試験を実施し、破断伸び、100%応力及び破断強度を測定することで柔軟性の変化を確認した。その結果を表2に示す。   Each tube was treated under the following conditions a) to c), and then punched in the extrusion direction (MD direction) of the molded product using a JIS K62517 dumbbell, and a test piece was collected. A tensile test was performed at a test speed of 200 mm / min, and changes in flexibility were confirmed by measuring elongation at break, 100% stress and strength at break. The results are shown in Table 2.

(処理条件)
(a)初期<初 期>
(b)エチレンオキサイド滅菌+50℃加熱蒸散1週間処理<滅菌処理後>
(c)有効期限満了後の柔軟性を推定評価するために、(b)を更に70℃ ×15日処理実施<加速処理後>
表2にはa)、b)、c)の条件をそれぞれ< >の表現で記載する。
(Processing conditions)
(A) Early <Initial>
(B) Ethylene oxide sterilization + 50 ° C heat transpiration for 1 week <After sterilization>
(C) In order to estimate and evaluate the flexibility after expiration of the expiration date, (b) is further processed at 70 ° C. for 15 days <after acceleration processing>
In Table 2, the conditions of a), b), and c) are described in terms of <>.

Figure 2005040397
Figure 2005040397

Figure 2005040397
Figure 2005040397

表2が示すように、本発明のカテーテルは加速処理後も100%応力の変化が小さかった。すなわち、有効期限満了後の柔軟性の変化が小さいと推定された。   As Table 2 shows, the catheter of the present invention had a small change in 100% stress even after the acceleration treatment. That is, it was estimated that the change in flexibility after the expiration date expired was small.

本発明のカテーテルは、現行のDEHP系可塑剤を用いた軟質塩化ビニルからなるカテーテルに比べて、柔軟性の経時変化が少なく、品質がより安定しているため、各種の医療用具に使用できる。   The catheter of the present invention can be used for various medical devices because it has less change with time in flexibility and more stable quality than a catheter made of soft vinyl chloride using a current DEHP plasticizer.

Claims (1)

塩化ビニル系樹脂100重量部に対して、一般式(1)で示されるシクロヘキサン−1,2−ジカルボン酸系エステル20〜100重量部を配合してなる軟質塩化ビニル樹脂から構成されるカテーテル。
Figure 2005040397
(ただし、式中R1、R2はそれぞれ直鎖あるいは分岐のアルキル基からなり、含まれる炭素数は2〜12の範囲にある。)
A catheter composed of a soft vinyl chloride resin obtained by blending 20 to 100 parts by weight of a cyclohexane-1,2-dicarboxylic acid ester represented by the general formula (1) with respect to 100 parts by weight of a vinyl chloride resin.
Figure 2005040397
(However, in the formula, R1 and R2 are each composed of a linear or branched alkyl group, and the number of carbon atoms contained is in the range of 2 to 12.)
JP2003278508A 2003-07-23 2003-07-23 Catheter Withdrawn JP2005040397A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100729896B1 (en) * 2005-12-14 2007-06-18 엘에스전선 주식회사 Polyvinyl chloride composition containing porous material and insulating covering material and cable using there of
JP2008195898A (en) * 2007-02-15 2008-08-28 Showa Kasei Kogyo Kk Hard vinyl chloride-based resin composition for medical use and hard parts for medical use using the same
JP2015044891A (en) * 2013-08-27 2015-03-12 リケンテクノス株式会社 Medical radiation sterilization-compatible vinyl chloride resin composition and medical instrument composed of the same
JP2015044890A (en) * 2013-08-27 2015-03-12 リケンテクノス株式会社 Medical vinyl chloride resin composition and medical instrument
JP2015089895A (en) * 2013-11-05 2015-05-11 リケンテクノス株式会社 Medical vinyl chloride resin composition and medical instrument composed of the same
JP2015209465A (en) * 2014-04-25 2015-11-24 リケンテクノス株式会社 Vinyl chloride-based resin composition
JP2016044297A (en) * 2014-08-27 2016-04-04 リケンテクノス株式会社 Vinyl chloride resin composition
JP2016074161A (en) * 2014-10-08 2016-05-12 平岡織染株式会社 Flexible sheet with holding anti-blocking effect and manufacturing method therefor
US10836739B2 (en) 2015-05-27 2020-11-17 New Japan Chemical Co., Ltd Epoxycyclohexane dicarboxylic acid diester, plasticizer, stabilizer and resin composition

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100729896B1 (en) * 2005-12-14 2007-06-18 엘에스전선 주식회사 Polyvinyl chloride composition containing porous material and insulating covering material and cable using there of
JP2008195898A (en) * 2007-02-15 2008-08-28 Showa Kasei Kogyo Kk Hard vinyl chloride-based resin composition for medical use and hard parts for medical use using the same
JP2015044891A (en) * 2013-08-27 2015-03-12 リケンテクノス株式会社 Medical radiation sterilization-compatible vinyl chloride resin composition and medical instrument composed of the same
JP2015044890A (en) * 2013-08-27 2015-03-12 リケンテクノス株式会社 Medical vinyl chloride resin composition and medical instrument
JP2015089895A (en) * 2013-11-05 2015-05-11 リケンテクノス株式会社 Medical vinyl chloride resin composition and medical instrument composed of the same
JP2015209465A (en) * 2014-04-25 2015-11-24 リケンテクノス株式会社 Vinyl chloride-based resin composition
JP2016044297A (en) * 2014-08-27 2016-04-04 リケンテクノス株式会社 Vinyl chloride resin composition
JP2016074161A (en) * 2014-10-08 2016-05-12 平岡織染株式会社 Flexible sheet with holding anti-blocking effect and manufacturing method therefor
US10836739B2 (en) 2015-05-27 2020-11-17 New Japan Chemical Co., Ltd Epoxycyclohexane dicarboxylic acid diester, plasticizer, stabilizer and resin composition

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