JP2003112357A - Method for manufacturing pipe - Google Patents
Method for manufacturing pipeInfo
- Publication number
- JP2003112357A JP2003112357A JP2001307846A JP2001307846A JP2003112357A JP 2003112357 A JP2003112357 A JP 2003112357A JP 2001307846 A JP2001307846 A JP 2001307846A JP 2001307846 A JP2001307846 A JP 2001307846A JP 2003112357 A JP2003112357 A JP 2003112357A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- weight
- pipe
- chloride resin
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、塩素化塩化ビニル
系樹脂のパイプの製造方法に関する。
【０００２】
【従来の技術】塩素化塩化ビニル系樹脂は一般に塩化ビ
ニル系樹脂を後塩素化して製造されており、塩化ビニル
系樹脂の長所である、難燃性、耐薬品性等に優れ、且つ
塩化ビニル系樹脂の欠点である耐熱性が改善されている
のではば広い用途が期待されている。
【０００３】最近、塩素化塩化ビニル系樹脂の熱変形温
度は、塩化ビニル系樹脂の熱変形温度より２０〜４０℃
も高いので、給湯水管のうち耐熱性が要求される用途、
即ち、高温の熱水用の給湯管に使用されている。
【０００４】しかし、塩素化塩化ビニル系樹脂は溶融粘
度が高くて熱成形性が悪く、高温で成形しなければなら
ず、塩化ビニル系樹脂の成形の際に使用されている、金
属石鹸系安定剤、有機錫系安定剤等の安定剤では不充分
であった。
【０００５】これらを改良するため、例えば特開平４−
３５９９２８号公報にはハイドロタルサイト、有機脂肪
酸カルシウム塩、メタクリル酸メチル−ブタジエン−ス
チレン系共重合体を添加することが記載されているが、
パイプを押出成形すると、表面性及び光沢の良いパイ
プ、特に、内面の表面性及び光沢の良いパイプは得られ
なかった。
【０００６】
【発明が解決しようとする課題】本発明の目的は、上記
欠点に鑑み、表面性及び光沢性よい塩素化塩化ビニル系
樹脂のパイプ、特に、内面の表面性及び光沢性よい塩素
化塩化ビニル系樹脂のパイプを得ることのできる製造方
法を提供することにある。
【０００７】
【課題を解決するための手段】本発明のパイプの製造方
法は、塩素含有量が６４〜６８重量％の塩素化塩化ビニ
ル系樹脂１００重量部と酸価度が１５〜２５、重量平均
分子量が２０００〜３５００の酸化ポリエチレンワック
ス０．１〜０．６重量部からなる樹脂組成物を、樹脂温
度が１９０〜２１０℃、押出圧力が１５０〜２５０Ｋｇ
／cm2の条件で押出成形することを特徴とする。
【０００８】
【発明の実施の形態】本発明で使用される塩素化塩化ビ
ニル系樹脂は、塩化ビニル系樹脂の後塩素化物であっ
て、塩素含有量が少なくなると耐熱性が低下し、多くな
ると成形性、耐衝撃性等が低下するので、塩素含有量が
６４〜６８重量％の塩素化塩化ビニル系樹脂に限定され
る。
【０００９】上記塩化ビニル系樹脂は、塩化ビニルモノ
マー単独重合体若しくは塩化ビニルモノマーを主体（５
０重量％以上含む）とする、塩化ビニルモノマーと共重
合可能なビニルモノマーとの共重合体である。
【００１０】上記ビニルモノマーとしては、例えば、酢
酸ビニル、プロピオン酸ビニル等のビニルエステル；メ
チル（メタ）アクリレート、エチル（メタ）アクリレー
ト等のアルキル（メタ）アクリレートモノマー；エチレ
ン、プロピレン等のオレフィン；（メタ）アクリル酸、
無水マレイン酸、アクリロニトリル、スチレン、塩化ビ
ニリデンなどがあげられる。
【００１１】塩化ビニル系樹脂の平均重合度は、小さく
なると機械的強度が低下し、大きくなると成形性が低下
するので、７００〜１４００が好ましく、より好ましく
は９００〜１１００である。尚、平均重合度はＪＩＳ
Ｋ６７２１に準拠して測定した値である。
【００１２】本発明で使用される酸化ポリエチレンワッ
クスは、酸価度が１５〜２５、重量平均分子量が２００
０〜３５００である。
【００１３】酸化ポリエチレンワックスは、ポリエチレ
ンワックスを酸化したものであり、塩素化塩化ビニル系
樹脂を押出成形する際に、塩素化塩化ビニル系樹脂の溶
融粘度を一定に保ち、長時間の成形が可能で光沢及び平
滑性の優れたパイプを得るための滑剤であるから、酸価
度が１５〜２５で重量平均分子量が２０００〜３５００
のものが使用される。
【００１４】尚、酸価度は酸化ポリエチレンワックス１
ｍｇが含有する遊離酸を中和するのに要する水酸化ナト
リウムの量（ｍｇ）であり、１ｍｇの酸化ポリエチレン
ワックスを溶剤１０ｍｌに溶解し、フェノールフタレイ
ンを指示薬として、０．１Ｎの水酸化ナトリウムアルコ
ール溶液で中和して測定する。
【００１５】本発明で使用される樹脂組成物は、塩素化
塩化ビニル系樹脂と酸化ポリエチレンワックスからなる
が、酸化ポリエチレンワックスの添加量が少ないと押出
成形できなくなり、多くなるとパイプの耐熱性が低下す
るので、塩素化塩化ビニル系樹脂１００重量部に対し酸
化ポリエチレンワックスは０．１〜０．６重量部添加さ
れるのであり、好ましくは０．２〜０．５重量部であ
る。
【００１６】上記樹脂組成物には、必要に応じて、従来
公知の熱安定剤、光安定剤、紫外線吸収剤、酸化防止
剤、顔料、充填剤、可塑剤、滑剤、加工助剤等が添加さ
れてもよい。
【００１７】本発明においては、上記樹脂組成物を押出
成形してパイプを製造する。押出成形の条件は、溶融樹
脂の温度が低かったり押出圧力が低いと押出成形できな
いし、溶融樹脂の温度が高かったり押出圧力が高いと熱
分解して着色したり、光沢性や平滑性が低下する。従っ
て、樹脂温度は１９０〜２１０℃であり、好ましくは１
９５〜２０５℃である。又、押出圧力は１５０〜２５０
Ｋｇ／cm2であり、好ましくは１８０〜２３０Ｋｇ／cm2
である。
【００１８】
【実施例】次に本発明の実施例を説明する。
【００１９】（実施例１〜６、比較例１〜６）表１及び
表２に示した所定量の塩素化塩化ビニル樹脂、酸化ポリ
エチレンワックス、オクチル錫メルカプト（日東化成社
製、商品名ＴＶＳ＃８８３１）２．０重量部、複合エス
テル系滑剤（理研ビタミン社製、商品名リケスターＳＬ
−０２）１．５重量部、アクリル系加工助剤（三菱レー
ヨン社製、商品名メタブレンＰ−５０１Ａ）１．０重量
部、ＭＢＳ系強化剤（クレハ化学社製、商品名クレハＴ
Ａ−７５１）５．０重量部、及び顔料（レジノ社製、商
品名グレーＮＢＳ−Ｗ９１４０）２．０重量部をスーパ
ーミキサーで混合した後、押出機でシリンダー温度１７
０〜１９０℃、ダイス温度１８０〜２００℃で押出して
パイプを得た。押出の際の樹脂温度及び押出圧力を測定
して表１及び表２に示した。
【００２０】尚、使用した塩素化塩化ビニル樹脂は以下
の通りである。
・ＣＰＶＣ−１ 徳山積水社製、商品名ＨＡ−５３Ｋ、
平均重合度１０００、塩素含有量６７重量％
・ＣＰＶＣ−２ 徳山積水社製、商品名ＨＡ−５１Ｈ、
平均重合度１０００、塩素含有量６５重量％
・ＣＰＶＣ−３ 徳山積水社製、商品名ＨＡ−５１Ｅ
Ｘ、平均重合度１０００、塩素含有量６２重量％
【００２１】又、使用した酸化ポリエチレンワックスは
以下の通りである。
・ＰＥＷ−１ 三井石油化学社製、商品名ハイワックス
４２０２Ｅ、重量平均分子量２６００、酸化度１７
・ＰＥＷ−２ 三井石油化学社製、商品名ハイワックス
４０５２Ｅ、重量平均分子量３２００、酸化度２０
・ＰＥＷ−３ 三井石油化学社製、商品名ハイワックス
２２０ＭＰ、重量平均分子量２０００、酸化度１
【００２２】得られたパイプの内面の光沢度、表面粗さ
及び熱変形温度を測定し、結果を表１及び表２に示し
た。尚、評価方法は以下の通りである。
【００２３】（１）光沢度 光沢度計（日本電色社製、
ＴＹＰＥ３００Ａ）で、反射角度６０度で測定した。
（２）表面粗さ ＪＩＳ Ｂ０６０１に準拠して測定し
た。
（３）熱変形温度 ＪＩＳ Ｋ７２０７に準拠して測定
した。
【００２４】
【表１】
【００２５】
【表２】【００２６】
【発明の効果】本発明のパイプの製造方法の構成は、上
述の通りであるから、塩素化塩化ビニル系樹脂が熱分解
したり、着色することなく長時間押出成形することがで
きる。得られた塩素化塩化ビニル系樹脂のパイプは、耐
熱性が優れ、表面性及び光沢性がよい、特に、内面の表
面性及び光沢性がよいので、特に、高温の熱水用の給湯
管に好適に使用できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a pipe made of chlorinated vinyl chloride resin. [0002] Chlorinated vinyl chloride resins are generally produced by post-chlorination of vinyl chloride resins, and are superior in flame retardancy and chemical resistance, which are the advantages of vinyl chloride resins. In addition, if the heat resistance, which is a drawback of the vinyl chloride resin, is improved, wide applications are expected. Recently, the heat distortion temperature of chlorinated vinyl chloride resin is 20 to 40 ° C. lower than the heat distortion temperature of vinyl chloride resin.
Is high, so it is used in hot water supply pipes where heat resistance is required,
That is, it is used for a hot water supply pipe for high-temperature hot water. However, chlorinated vinyl chloride resins have a high melt viscosity and poor thermoformability, and must be molded at a high temperature. And stabilizers such as organotin-based stabilizers were insufficient. In order to improve these, for example, Japanese Patent Laid-Open No.
No. 3,599,28 describes that a hydrotalcite, an organic fatty acid calcium salt, and a methyl methacrylate-butadiene-styrene copolymer are added.
When the pipe was extruded, a pipe having good surface properties and gloss, particularly a pipe having good inner surface properties and gloss, could not be obtained. SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a chlorinated vinyl chloride resin pipe having good surface properties and gloss, and in particular, a chlorinated pipe having good surface properties and gloss on the inner surface. An object of the present invention is to provide a production method capable of obtaining a pipe made of a vinyl chloride resin. According to the method of manufacturing a pipe of the present invention, 100 parts by weight of a chlorinated vinyl chloride resin having a chlorine content of 64 to 68% by weight, an acid value of 15 to 25, and a weight of A resin composition comprising 0.1 to 0.6 parts by weight of an oxidized polyethylene wax having an average molecular weight of 2,000 to 3,500 was prepared by applying a resin temperature of 190 to 210 ° C. and an extrusion pressure of 150 to 250 kg.
/ Cm 2 . DETAILED DESCRIPTION OF THE INVENTION The chlorinated vinyl chloride resin used in the present invention is a post-chlorinated product of the vinyl chloride resin. When the chlorine content decreases, the heat resistance decreases, and when the chlorine content increases, the heat resistance decreases. Since the moldability, impact resistance and the like are reduced, the chlorine content is limited to a chlorinated vinyl chloride resin having a content of 64 to 68% by weight. The vinyl chloride resin is mainly composed of a vinyl chloride monomer homopolymer or a vinyl chloride monomer (5.
0% by weight or more) is a copolymer of a vinyl chloride monomer and a copolymerizable vinyl monomer. Examples of the vinyl monomer include vinyl esters such as vinyl acetate and vinyl propionate; alkyl (meth) acrylate monomers such as methyl (meth) acrylate and ethyl (meth) acrylate; olefins such as ethylene and propylene; (Meth) acrylic acid,
Maleic anhydride, acrylonitrile, styrene, vinylidene chloride and the like can be mentioned. The average degree of polymerization of the vinyl chloride resin is preferably from 700 to 1400, more preferably from 900 to 1100, since the mechanical strength decreases when the average degree of polymerization decreases, and the moldability decreases when the average degree of polymerization increases. The average degree of polymerization is JIS
It is a value measured according to K6721. The oxidized polyethylene wax used in the present invention has an acid value of 15 to 25 and a weight average molecular weight of 200.
0 to 3500. [0013] Oxidized polyethylene wax is obtained by oxidizing polyethylene wax. When extruding a chlorinated vinyl chloride resin, the melt viscosity of the chlorinated vinyl chloride resin is kept constant and molding can be performed for a long time. Is a lubricant for obtaining a pipe having excellent gloss and smoothness, and has an acid value of 15 to 25 and a weight average molecular weight of 2000 to 3500.
Is used. The acid value of the oxidized polyethylene wax 1
mg is the amount (mg) of sodium hydroxide required to neutralize the free acid contained therein. 1 mg of oxidized polyethylene wax is dissolved in 10 ml of a solvent, and phenolphthalein is used as an indicator in 0.1 N sodium hydroxide. Measure by neutralizing with an alcohol solution. The resin composition used in the present invention comprises a chlorinated vinyl chloride resin and a polyethylene oxide wax. If the amount of the polyethylene oxide wax is small, extrusion molding cannot be carried out. Therefore, 0.1 to 0.6 parts by weight of the polyethylene oxide wax is added to 100 parts by weight of the chlorinated vinyl chloride resin, and preferably 0.2 to 0.5 parts by weight. [0016] If necessary, conventionally known heat stabilizers, light stabilizers, ultraviolet absorbers, antioxidants, pigments, fillers, plasticizers, lubricants, processing aids, etc. are added to the above resin composition. May be done. In the present invention, a pipe is manufactured by extruding the above resin composition. Extrusion molding conditions are that extrusion cannot be performed if the temperature of the molten resin is low or the extrusion pressure is low, and if the temperature of the molten resin is high or the extrusion pressure is high, coloring occurs due to thermal decomposition, and gloss and smoothness are reduced. I do. Therefore, the resin temperature is 190-210 ° C., preferably 1
95-205 ° C. The extrusion pressure is 150-250.
Kg / cm 2 , preferably 180 to 230 Kg / cm 2
It is. Next, an embodiment of the present invention will be described. Examples 1-6, Comparative Examples 1-6 Predetermined amounts of chlorinated vinyl chloride resin, polyethylene oxide wax, and octyltin mercapto (trade name TVS #, manufactured by Nitto Kasei Co., Ltd.) shown in Tables 1 and 2 8831) 2.0 parts by weight, complex ester lubricant (manufactured by Riken Vitamin Co., Ltd., trade name RIQUESTER SL)
-02) 1.5 parts by weight, acrylic processing aid (manufactured by Mitsubishi Rayon Co., Ltd., trade name Metablen P-501A) 1.0 part by weight, MBS-based reinforcing agent (Kureha Chemical Co., trade name Kureha T)
A-751) 5.0 parts by weight and a pigment (trade name: Gray NBS-W9140, manufactured by Resino Co., 2.0 parts by weight) were mixed with a super mixer, and then the cylinder temperature was adjusted to 17 with an extruder.
The pipe was extruded at 0 to 190 ° C and a die temperature of 180 to 200 ° C to obtain a pipe. The resin temperature and extrusion pressure during extrusion were measured and are shown in Tables 1 and 2. The chlorinated vinyl chloride resins used are as follows.・ CPVC-1 manufactured by Tokuyama Sekisui Co., trade name HA-53K,
Average polymerization degree 1000, chlorine content 67% by weightCPVC-2 manufactured by Tokuyama Sekisui Co., trade name HA-51H,
Average polymerization degree 1000, chlorine content 65% by weight ・ CPVC-3 manufactured by Tokuyama Sekisui Co., Ltd., trade name HA-51E
X, average degree of polymerization: 1000, chlorine content: 62% by weight The oxidized polyethylene wax used is as follows. -PEW-1 made by Mitsui Petrochemical Co., Ltd., trade name High Wax 4202E, weight average molecular weight 2,600, oxidation degree 17 -3, manufactured by Mitsui Petrochemical Co., Ltd., trade name: High Wax 220MP, weight average molecular weight: 2,000, degree of oxidation: 1. The glossiness, surface roughness and heat deformation temperature of the inner surface of the obtained pipe were measured, and the results are shown in Table 1. And Table 2. The evaluation method is as follows. (1) Glossiness Glossmeter (manufactured by Nippon Denshoku Co., Ltd.)
TYPE 300A) at a reflection angle of 60 degrees. (2) Surface roughness Measured in accordance with JIS B0601. (3) Heat deformation temperature Measured in accordance with JIS K7207. [Table 1] [Table 2] The construction of the pipe manufacturing method of the present invention is as described above, so that the chlorinated vinyl chloride resin can be extruded for a long time without being thermally decomposed or colored. . The resulting chlorinated vinyl chloride resin pipe has excellent heat resistance, good surface properties and gloss, and especially good surface and gloss on the inner surface. It can be suitably used.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｋ 27:06 Ｂ２９Ｌ 23:00 Ｂ２９Ｌ 23:00 Ｆターム(参考） 4F071 AA15 AA24 AA71 AA79 AH19 BB06 BC05 4F207 AA15 AA49 AB11 AG08 AR02 AR06 KA01 KA17 KF02 KM15 4J002 BB032 BD181 FD090 FD170 GT00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B29K 27:06 B29L 23:00 B29L 23:00 F term (Reference) 4F071 AA15 AA24 AA71 AA79 AH19 BB06 BC05 4F207 AA15 AA49 AB11 AG08 AR02 AR06 KA01 KA17 KF02 KM15 4J002 BB032 BD181 FD090 FD170 GT00
Claims (1)
塩化ビニル系樹脂１００重量部と酸価度が１５〜２５、
重量平均分子量が２０００〜３５００の酸化ポリエチレ
ンワックス０．１〜０．６重量部からなる樹脂組成物
を、樹脂温度が１９０〜２１０℃、押出圧力が１５０〜
２５０Ｋｇ／cm2の条件で押出成形することを特徴とす
るパイプの製造方法。Claims: 1. A chlorinated vinyl chloride resin having a chlorine content of 64 to 68% by weight (100 parts by weight) and an acid value of 15 to 25,
A resin composition consisting of 0.1 to 0.6 parts by weight of oxidized polyethylene wax having a weight average molecular weight of 2000 to 3500 was prepared at a resin temperature of 190 to 210 ° C and an extrusion pressure of 150 to
A method for producing a pipe, comprising extruding under conditions of 250 kg / cm 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001307846A JP2003112357A (en) | 2001-10-03 | 2001-10-03 | Method for manufacturing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001307846A JP2003112357A (en) | 2001-10-03 | 2001-10-03 | Method for manufacturing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003112357A true JP2003112357A (en) | 2003-04-15 |
Family
ID=19127246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001307846A Pending JP2003112357A (en) | 2001-10-03 | 2001-10-03 | Method for manufacturing pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003112357A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017068954A1 (en) * | 2015-10-19 | 2017-04-27 | 三井化学株式会社 | Resin composition, and molded article and pipe formed from said composition |
| KR101882456B1 (en) * | 2017-11-10 | 2018-07-27 | 주식회사 고리 | Resin composition of triple-walled impact resistant hard polyvinyl chloride pipe for water supply and sewage and high impact resistant polyvinyl chloride pipe using that resin composition |
| WO2021065941A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Resin composition for molding and molded article |
| WO2021065946A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Molding resin composition and molded article |
-
2001
- 2001-10-03 JP JP2001307846A patent/JP2003112357A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10414915B2 (en) | 2015-10-19 | 2019-09-17 | Mitsui Chemicals, Inc. | Resin composition, and molded article and pipe formed from said composition |
| CN108137894B (en) * | 2015-10-19 | 2021-01-01 | 三井化学株式会社 | Resin composition, and molded article and pipe made of the composition |
| KR20180049037A (en) * | 2015-10-19 | 2018-05-10 | 미쓰이 가가쿠 가부시키가이샤 | Resin composition, molded article and pipe made of the composition |
| CN108137894A (en) * | 2015-10-19 | 2018-06-08 | 三井化学株式会社 | Resin combination, the formed body and pipe formed by the composition |
| KR102113993B1 (en) * | 2015-10-19 | 2020-05-22 | 미쓰이 가가쿠 가부시키가이샤 | Resin composition, molded body and pipe made of the composition |
| EP3366722A4 (en) * | 2015-10-19 | 2019-03-20 | Mitsui Chemicals, Inc. | Resin composition, and molded article and pipe formed from said composition |
| JP2018059045A (en) * | 2015-10-19 | 2018-04-12 | 三井化学株式会社 | Resin composition, and molded body and pipe formed from the composition |
| WO2017068954A1 (en) * | 2015-10-19 | 2017-04-27 | 三井化学株式会社 | Resin composition, and molded article and pipe formed from said composition |
| KR101882456B1 (en) * | 2017-11-10 | 2018-07-27 | 주식회사 고리 | Resin composition of triple-walled impact resistant hard polyvinyl chloride pipe for water supply and sewage and high impact resistant polyvinyl chloride pipe using that resin composition |
| WO2021065946A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Molding resin composition and molded article |
| WO2021065941A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Resin composition for molding and molded article |
| JPWO2021065946A1 (en) * | 2019-09-30 | 2021-11-25 | 積水化学工業株式会社 | Resin composition for molding and molded product |
| JPWO2021065941A1 (en) * | 2019-09-30 | 2021-12-02 | 積水化学工業株式会社 | Resin composition for molding and molded body |
| JP7144533B2 (en) | 2019-09-30 | 2022-09-29 | 積水化学工業株式会社 | Molding resin composition and molding |
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