JP2004002876A - Poly(1-butene) resin composition - Google Patents

Poly(1-butene) resin composition Download PDF

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Publication number
JP2004002876A
JP2004002876A JP2003194133A JP2003194133A JP2004002876A JP 2004002876 A JP2004002876 A JP 2004002876A JP 2003194133 A JP2003194133 A JP 2003194133A JP 2003194133 A JP2003194133 A JP 2003194133A JP 2004002876 A JP2004002876 A JP 2004002876A
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Japan
Prior art keywords
poly
butene
resin composition
butene resin
water supply
Prior art date
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JP2003194133A
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Japanese (ja)
Inventor
Fukashi Kagawa
香川 不可止
Shin Tokui
得居 伸
Masaki Kamiyama
神山 政樹
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Mitsui Chemicals Inc
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Mitsui Chemicals Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a poly(1-butene) resin composition which is excellent in the pressure-resistant strength and the chlorine water resistibility and also is suitable for water supply piping, and hot-water supply piping, and to provide such pipe sections for water supply piping and hot water supply piping as is made of this poly(1-butene). <P>SOLUTION: This poly(1-butene) resin composition comprises 100 pts.wt. of a poly(1-butene) resin and 0.05-10 pts.wt. of a warm-colored pigment. This composition gives pipe sections for water supply piping and hot water supply piping. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明はポリ−1−ブテン樹脂組成物に関し、特に耐圧強度、耐塩素水性に優れ、給水・給湯配管用に好適なポリ−1−ブテン樹脂組成物に関する。
【0002】
【従来の技術】
水道管や家庭用温水管には、従来より鉄管、真鍮管等の金属製の管材が使用されてきたが、これらの金属製管材の内面は、時間の経過とともに発錆し、生じた錆が飲み水等に混入することが問題となっている。そこで、近年は樹脂を内面にコートした金属管を採用するようになったが、この場合でも金属管の内面の発錆の問題を完全に解決することはできない。このため、最近、給水・給湯配管用に発錆の問題がない合成樹脂製の管を採用する動きが高まっている。
【0003】
ところで、ポリ−1−ブテン樹脂は、耐圧強度、高温での内圧クリープ性、高温および低温特性、耐摩耗性に優れ、しかも可撓性にも優れていることから、給水・給湯配管用の管材として開発が進められている。
【0004】
【発明が解決しようとする課題】
しかし、ポリ−1−ブテン樹脂は、他のポリオレフィン樹脂と同じく、水道水に含有されている塩素により化学反応を受け易いという欠点があった。この反応は特に高温下で塩素に曝された際に顕著であり、このことが従来より長期使用に対する隘路となっていた。
【0005】
そこで、本発明の目的は、耐圧強度、高温での内圧クリープ性、高温および低温特性、耐摩耗性、可撓性に優れるとともに、耐塩素水性に優れるため、給水・給湯配管用の管材に好適なポリ−1−ブテン樹脂組成物、およびそのポリ−1−ブテン樹脂組成物からなる給水・給湯配管用管材を提供することにある。
【0006】
【課題を解決するための手段】
本発明者は、耐塩素水性に優れ、特に給水・給湯配管用途に好適なポリ−1−ブテン樹脂組成物を見出すべく鋭意研究を行った結果、ポリ−1−ブテン樹脂に特定の顔料を配合してなる組成物が耐塩素水性に優れることを見出し、本発明に到達した。
【0007】
すなわち、本発明は、ポリ−1−ブテン樹脂100重量部と、暖色系顔料0.05〜10重量部とを含むポリ−1−ブテン樹脂組成物を提供するものである。
【0008】
本発明は、前記暖色系顔料が、チタンホワイト、イソインドリノンレッド、チタン・イエロー、キナクリドンレッド、ペリレンレッド、縮合アゾレッド、イソインドリノンオレンジおよびイソインドリノンイエローから選ばれる少なくとも1種の顔料であることが好ましい。
【0009】
また、本発明は、前記ポリ−1−ブテン樹脂組成物からなる給水・給湯配管用管材をも提供するものである。
【0010】
【発明の実施の形態】
以下、本発明について詳細に説明する。
【0011】
本発明の組成物の主成分であるポリ−1−ブテン樹脂としては、1−ブテンの単独重合体、1−ブテンと他のα−オレフィンとの共重合体、あるいはこれらの重合体または共重合体と他のα−オレフィン系重合体との混合物などが挙げられる。他のα−オレフィンとしては、例えば、エチレン、プロピレン、4−メチル−1−ペンテン、1−ヘキセン、1−オクテン等が挙げられる。この1−ブテンと他のα−オレフィンとの共重合体における他のα−オレフィンの含有量は、通常10モル%以下である。また、他のα−オレフィン系重合体としては、例えば、ポリエチレン、ポリプロピレン、ポリ−4−メチル−1−ペンテン、エチレン・プロピレン共重合体、エチレン・1−ブテン共重合体、プロピレン・1−ブテン共重合体等が挙げられる。ポリ−1−ブテン樹脂が、1−ブテンの単独重合体または1−ブテンと他のα−オレフィンとの共重合体と、他のα−オレフィン系重合体との混合物である場合、他のα−オレフィン系重合体の含有量は、通常50重量%以下である。
【0012】
本発明の組成物において、ポリ−1−ブテン樹脂は、前記1−ブテンの単独重合体、1−ブテンと他のα−オレフィンとの共重合体、あるいはこれらの重合体または共重合体と他のα−オレフィン系重合体は、1種単独でも、2種以上を組み合わせても用いられる。
【0013】
このポリ−1−ブテン樹脂は、通常メルトフローレート(以下、「MFR」という)が0.01〜50g/10min(ASTM D 1238N、190℃)の範囲のものであり、給水・給湯配管用管材として0.1〜0.8g/10minの範囲のものが好ましい。
【0014】
本発明の組成物の成分である暖色系顔料としては、例えば、チタンホワイト、イソインドリノンレッド、チタン・イエロー、キナクリドンレッド、ペリレンレッド、縮合アゾレッド、イソインドリノンオレンジ、イソインドリノンイエロー等の顔料が挙げられる。これらは1種単独でも2種以上を組み合わせても用いられる。これらの中でも、チタンホワイト、キナクリドンレッドおよびイソインドリノンイエローが好ましい。
【0015】
本発明の組成物において、ポリ−1−ブテン樹脂と、暖色系顔料の好ましい組み合わせとしては、イソインドリノンイエロー、チタンホワイト、ペリレンレッドが挙げられる。
【0016】
本発明の組成物におけるポリ−1−ブテン樹脂と暖色系顔料の配合割合は、ポリ−1−ブテン樹脂100重量部に対して、暖色系顔料0.05〜10重量部であり、好ましくは0.1〜5重量部、特に好ましくは0.2〜2重量部の割合である。
【0017】
また、本発明の組成物には、前記ポリ−1−ブテン樹脂および暖色系顔料以外に、必要に応じて他の成分を配合してもよい。例えば、分散剤、酸化防止剤、紫外線吸収剤、防かび剤、発錆防止剤、滑剤、充填剤等を配合してもよい。分散剤の具体例としては、ポリエチレンワックス、エチレンビスステアロアマイド(EBSA)等が挙げられる。また、酸化防止剤としては、例えば、商品名:Irganox1010、Irganox1076で市販されているもの等が挙げられる。
【0018】
本発明の組成物の製造は、前記ポリ−1−ブテン樹脂、暖色系顔料、および必要に応じて他の成分を配合し、これを溶融混練して行うことができる。
【0019】
また、本発明は、以上のポリ−1−ブテン樹脂組成物の耐塩素水性に優れるという特徴を活かして、このポリ−1−ブテン樹脂組成物からなる給水・給湯配管用の管材をも提供するものである。
【0020】
この給水・給湯配管用の管材の具体例としては、パイプ、各種パイプ継手、ブロー成形品等が挙げられ、これらの管材の全体、または塩素水と接触する面を、前記本発明のポリ−1−ブテン樹脂組成物で構成するものである。
【0021】
本発明のポリ−1−ブテン樹脂組成物からなる給水・給湯配管用管材の製造は、前記ポリ−1−ブテン樹脂、暖色系顔料、および必要に応じて配合する他の成分を、予め混合して混合物を調製し、この混合物を、成形機に供給して成形してもよいし、前記ポリ−1−ブテン樹脂、暖色系顔料、および必要に応じて配合する他の成分を、それぞれ独立に成形機に所定の配合比で投入し、混練しながら、成形に供してもよい。
用いられる成形機は、押出成形機、射出成形機、ブロー成形機等のいずれの成形機でもよく、所望の管材の形態に応じて適宜選択される。例えば、ポリブテンパイプ用継手、管端防食継手、各種ブロー容器等の成形品は、その形態に応じて成形機を選択して成形することができる。
【0022】
【実施例】
以下、本発明の実施例および比較例を挙げて、本発明を具体的に説明する。
【0023】
(実施例1〜6、比較例1〜3)
各例において、ポリ−1−ブテン樹脂(三井石油化学工業(株)製、M801P)100重量部に対して、ポリエチレンワックス(三井石油化学工業(株)製、325MP)0.4重量部、酸化防止剤0.4重量部および表1に示す有機系顔料0.2重量部の割合で配合して、ポリ−1−ブテン樹脂組成物を調製し、この組成物を、20φの押出成形機に供給してペレットに造粒した。
【0024】
このペレットを温度200℃の加熱プレスで10分間溶融後、温度30℃の冷却プレスで3分間加圧して、厚さ2.5mmのプレスシートを作製した。このプレスシートから5mm×55mmの試験片を切り出した。この試験片を下記の方法に従って耐塩素水性試験に供した。結果を表1に示す。
【0025】
耐塩素水性試験
反応管内の温度および管内の塩素濃度を一定に調整可能な耐塩素水性促進試験装置において、試験片を幅50mmの保持具に曲げ支持状態で取付け、温度90℃、有効塩素濃度100ppm、流量1L/hrの塩素含有水に曝し、目視により全面白色化するまでの塩素含有水の通水時間を測定し、耐塩素水性の指標とした。
【0026】
(実施例7〜9、比較例4〜7)
各例において、ポリ−1−ブテン樹脂(三井石油化学工業(株)製、M801P)100重量部に対して、ポリエチレンワックス(三井石油化学工業(株)製、325MP)0.4重量部、および表1に示す無機系顔料を0.3重量部の割合で配合して、ポリ−1−ブテン樹脂組成物を調製し、この組成物を、20φの押出成形機に供給してペレットに造粒した。
【0027】
このペレットを用いて、実施例1と同様にして試験片を作製し、耐塩素水性試験に供した。結果を表1に示す。
【0028】
(比較例8)
ポリ−1−ブテン樹脂(三井石油化学工業(株)製、M801P)100重量部に対して、カーボンブラック(三菱カーボン(株)製、#44)2.0重量部の割合で配合して、ポリ−1−ブテン樹脂組成物を調製し、この組成物を押出成形機に供給して、実施例1と同様にして試験片を作製し、耐塩素水性試験に供した。結果を表1に示す。
【0029】
(比較例9)
ポリ−1−ブテン樹脂(三井石油化学工業(株)製、M801P)を押出成形機に供給してポリ−1−ブテン樹脂単体からなるペレットを造粒し、さらに実施例1と同様にして試験片を作製した。この試験片を実施例1と同様にして耐塩素水性試験に供した。結果を表1に示す。
【0030】

Figure 2004002876
【0031】
Figure 2004002876
【0032】
【発明の効果】
本発明のポリ−1−ブテン樹脂組成物は、耐圧強度、高温での内圧クリープ性、高温および低温特性、耐摩耗性、可撓性に優れるとともに、耐塩素水性に優れるため、給水・給湯配管用の管材に好適である。
また、本発明の給水・給湯配管用管材は、前記本発明のポリ−1−ブテン樹脂組成物からなるものであり、耐圧強度、高温での内圧クリープ性、高温および低温特性、耐摩耗性、可撓性に優れるものである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a poly-1-butene resin composition, and more particularly to a poly-1-butene resin composition having excellent pressure resistance and chlorine water resistance and suitable for water supply / hot water supply piping.
[0002]
[Prior art]
Conventionally, metal pipes such as iron pipes and brass pipes have been used for water pipes and domestic hot water pipes. There is a problem that it is mixed into drinking water. Therefore, in recent years, metal tubes coated with resin on the inner surface have been adopted, but even in this case, the problem of rust on the inner surface of the metal tube cannot be completely solved. For this reason, recently, there has been an increasing movement to adopt a synthetic resin pipe having no rusting problem for water supply / hot water supply pipe.
[0003]
By the way, poly-1-butene resin is excellent in pressure resistance, internal pressure creep at high temperature, high and low temperature characteristics, abrasion resistance, and also excellent in flexibility. It is being developed as
[0004]
[Problems to be solved by the invention]
However, poly-1-butene resin, like other polyolefin resins, has a drawback that it is susceptible to a chemical reaction due to chlorine contained in tap water. This reaction is particularly remarkable when exposed to chlorine at high temperatures, which has been a bottleneck for long-term use than before.
[0005]
Therefore, an object of the present invention is to provide excellent pressure resistance, internal pressure creep at high temperatures, high and low temperature characteristics, abrasion resistance, flexibility, and excellent chlorine water resistance. Another object of the present invention is to provide a poly-1-butene resin composition and a pipe for water / hot water supply piping comprising the poly-1-butene resin composition.
[0006]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to find a poly-1-butene resin composition which is excellent in chlorine water resistance and particularly suitable for water supply / hot water supply piping, and as a result, a specific pigment is mixed with poly-1-butene resin. The inventors have found that the resulting composition has excellent chlorine water resistance, and have reached the present invention.
[0007]
That is, the present invention provides a poly-1-butene resin composition containing 100 parts by weight of a poly-1-butene resin and 0.05 to 10 parts by weight of a warm color pigment.
[0008]
In the present invention, the warm color pigment is at least one pigment selected from titanium white, isoindolinone red, titanium yellow, quinacridone red, perylene red, condensed azo red, isoindolinone orange and isoindolinone yellow. Is preferred.
[0009]
The present invention also provides a pipe for water / hot water supply piping comprising the poly-1-butene resin composition.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
[0011]
Examples of the poly-1-butene resin as a main component of the composition of the present invention include a homopolymer of 1-butene, a copolymer of 1-butene and another α-olefin, or a polymer or copolymer thereof. A mixture of the union and another α-olefin polymer is exemplified. Examples of other α-olefins include ethylene, propylene, 4-methyl-1-pentene, 1-hexene, 1-octene and the like. The content of the other α-olefin in the copolymer of 1-butene and the other α-olefin is usually 10 mol% or less. Other α-olefin polymers include, for example, polyethylene, polypropylene, poly-4-methyl-1-pentene, ethylene / propylene copolymer, ethylene / 1-butene copolymer, propylene / 1-butene And copolymers. When the poly-1-butene resin is a homopolymer of 1-butene or a mixture of 1-butene and another α-olefin and a mixture of another α-olefin-based polymer, -The content of the olefin polymer is usually 50% by weight or less.
[0012]
In the composition of the present invention, the poly-1-butene resin is a homopolymer of the above-mentioned 1-butene, a copolymer of 1-butene and another α-olefin, or a copolymer of these or other polymers. May be used alone or in combination of two or more.
[0013]
This poly-1-butene resin usually has a melt flow rate (hereinafter, referred to as “MFR”) in the range of 0.01 to 50 g / 10 min (ASTM D1238N, 190 ° C.), and is used for pipes for water / hot water supply piping. Is preferably in the range of 0.1 to 0.8 g / 10 min.
[0014]
Examples of the warm color pigment that is a component of the composition of the present invention include pigments such as titanium white, isoindolinone red, titanium yellow, quinacridone red, perylene red, condensed azo red, isoindolinone orange, and isoindolinone yellow. Is mentioned. These may be used alone or in combination of two or more. Among these, titanium white, quinacridone red and isoindolinone yellow are preferred.
[0015]
In the composition of the present invention, preferred combinations of the poly-1-butene resin and the warm color pigment include isoindolinone yellow, titanium white, and perylene red.
[0016]
The blending ratio of the poly-1-butene resin and the warm color pigment in the composition of the present invention is 0.05 to 10 parts by weight of the warm color pigment based on 100 parts by weight of the poly-1-butene resin. 0.1 to 5 parts by weight, particularly preferably 0.2 to 2 parts by weight.
[0017]
Further, in addition to the poly-1-butene resin and the warm color pigment, other components may be added to the composition of the present invention as needed. For example, a dispersant, an antioxidant, an ultraviolet absorber, a fungicide, a rust inhibitor, a lubricant, a filler, and the like may be added. Specific examples of the dispersant include polyethylene wax, ethylene bisstearamide (EBSA), and the like. Examples of the antioxidant include those commercially available under the trade names: Irganox1010 and Irganox1076.
[0018]
The production of the composition of the present invention can be carried out by blending the poly-1-butene resin, the warm color pigment, and other components as necessary, and melt-kneading them.
[0019]
Further, the present invention also provides a pipe material for water / hot water supply piping made of the poly-1-butene resin composition by utilizing the characteristic of the above poly-1-butene resin composition that it is excellent in chlorine water resistance. Things.
[0020]
Specific examples of the pipe material for the water supply / hot water supply pipe include pipes, various pipe joints, blow-molded products, and the like. -A butene resin composition.
[0021]
In the production of pipes for water / hot water supply piping comprising the poly-1-butene resin composition of the present invention, the poly-1-butene resin, the warm color pigment, and other components to be blended as necessary are mixed in advance. The mixture may be supplied to a molding machine to form the mixture, or the poly-1-butene resin, the warm color pigment, and other components to be blended as necessary may be independently prepared. The mixture may be charged into a molding machine at a predetermined compounding ratio and subjected to molding while kneading.
The molding machine to be used may be any one of an extrusion molding machine, an injection molding machine, a blow molding machine and the like, and is appropriately selected according to a desired form of the tube material. For example, molded articles such as a polybutene pipe joint, a pipe end anticorrosion joint, and various blow containers can be molded by selecting a molding machine according to the form.
[0022]
【Example】
Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples of the present invention.
[0023]
(Examples 1 to 6, Comparative Examples 1 to 3)
In each case, 0.4 parts by weight of polyethylene wax (325MP, manufactured by Mitsui Petrochemicals Co., Ltd.), 100 parts by weight of poly-1-butene resin (M801P, manufactured by Mitsui Petrochemical Industries, Ltd.), oxidation A poly-1-butene resin composition was prepared by mixing 0.4 parts by weight of the inhibitor and 0.2 parts by weight of the organic pigment shown in Table 1, and this composition was placed in a 20φ extrusion molding machine. The mixture was supplied and granulated into pellets.
[0024]
The pellet was melted by a hot press at a temperature of 200 ° C. for 10 minutes, and then pressed by a cooling press at a temperature of 30 ° C. for 3 minutes to produce a 2.5 mm-thick press sheet. A test piece of 5 mm × 55 mm was cut out from the press sheet. This test piece was subjected to a chlorine water resistance test according to the following method. Table 1 shows the results.
[0025]
Chlorine-resistant water test In a chlorine-water-resistance-acceleration test apparatus capable of adjusting the temperature in the reaction tube and the chlorine concentration in the tube to a constant value, the test piece is mounted on a holder having a width of 50 mm in a bent support state, at a temperature of 90 ° C. and an effective chlorine concentration of 100 ppm. Then, the sample was exposed to chlorine-containing water at a flow rate of 1 L / hr, and the passage time of the chlorine-containing water until the entire surface was whitened was visually observed to obtain an index of chlorine-resistant water resistance.
[0026]
(Examples 7 to 9, Comparative Examples 4 to 7)
In each case, 0.4 parts by weight of polyethylene wax (325MP, manufactured by Mitsui Petrochemical Industries, Ltd.) and 100 parts by weight of poly-1-butene resin (M801P, manufactured by Mitsui Petrochemical Industries, Ltd.), and A poly-1-butene resin composition was prepared by blending the inorganic pigments shown in Table 1 in a ratio of 0.3 part by weight, and this composition was supplied to an extruder having a diameter of 20φ and granulated into pellets. did.
[0027]
Using these pellets, test pieces were prepared in the same manner as in Example 1, and subjected to a chlorine water resistance test. Table 1 shows the results.
[0028]
(Comparative Example 8)
100 parts by weight of poly-1-butene resin (M801P, manufactured by Mitsui Petrochemical Industry Co., Ltd.) was blended in a ratio of 2.0 parts by weight of carbon black (# 44, manufactured by Mitsubishi Carbon Corporation). A poly-1-butene resin composition was prepared, and this composition was supplied to an extruder. A test piece was prepared in the same manner as in Example 1, and subjected to a chlorine water resistance test. Table 1 shows the results.
[0029]
(Comparative Example 9)
A poly-1-butene resin (M801P, manufactured by Mitsui Petrochemical Industry Co., Ltd.) was supplied to an extruder to pelletize a poly-1-butene resin alone, and a test was conducted in the same manner as in Example 1. Pieces were made. This test piece was subjected to a chlorine water resistance test in the same manner as in Example 1. Table 1 shows the results.
[0030]
Figure 2004002876
[0031]
Figure 2004002876
[0032]
【The invention's effect】
The poly-1-butene resin composition of the present invention is excellent in pressure resistance, internal pressure creep at high temperature, high and low temperature characteristics, abrasion resistance, flexibility, and excellent in chlorine water resistance. It is suitable for use as a tube material.
Further, the pipe material for water supply / hot water supply pipe of the present invention is composed of the poly-1-butene resin composition of the present invention, and has a pressure resistance, an internal pressure creep property at a high temperature, high and low temperature properties, abrasion resistance, It is excellent in flexibility.

Claims (3)

ポリ−1−ブテン樹脂100重量部と、暖色系顔料0.05〜10重量部とを含むポリ−1−ブテン樹脂組成物。A poly-1-butene resin composition comprising 100 parts by weight of a poly-1-butene resin and 0.05 to 10 parts by weight of a warm color pigment. 前記暖色系顔料が、チタンホワイト、イソインドリノンレッド、チタン・イエロー、キナクリドンレッド、ペリレンレッド、縮合アゾレッド、イソインドリノンオレンジおよびイソインドリノンイエローから選ばれる少なくとも1種の顔料である請求項1に記載のポリ−1−ブテン樹脂組成物。The warm color pigment is at least one pigment selected from titanium white, isoindolinone red, titanium yellow, quinacridone red, perylene red, condensed azo red, isoindolinone orange and isoindolinone yellow. The poly-1-butene resin composition described in the above. 請求項1または2に記載のポリ−1−ブテン樹脂組成物からなる給水・給湯配管用管材。A pipe material for water / hot water supply piping, comprising the poly-1-butene resin composition according to claim 1.
JP2003194133A 2003-07-09 2003-07-09 Poly(1-butene) resin composition Ceased JP2004002876A (en)

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