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Medical pipe

A medical tube, acrylic technology, used in other medical devices, catheters, transportation and packaging, etc., can solve the problem of insufficient flexibility, products that do not meet flexibility, heat resistance and bending resistance, and products that do not meet the required performance, etc. problem, to achieve the effect of excellent kink resistance

Inactive Publication Date: 2007-03-21
OTSUKA PHARM FAB INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no products that meet the required properties such as flexibility, heat resistance, and bending resistance
[0011] On the other hand, polypropylene has isotactic polypropylene, syndiotactic polypropylene, etc. Among them, isotactic polypropylene is widely used in various packaging materials and industrial materials because of its cheap price, transparency, and good heat resistance, but Its flexibility is insufficient
Therefore, although a composition in which soft materials such as vinyl elastomers in PP are blended in PP has been studied, there is no product that meets the required performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0138] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to these examples.

[0139] Next, physical property test conditions and the like are recorded.

[0140] [Kink evaluation]

[0141]A hollow cylinder (1) having a hollow hole with a diameter of 10 mmΦ x a height of 5 mm was used as an evaluation model. The tube (2) was cut to an inner diameter of 2.1 mm and a length of 20 cm, and both ends were inserted into the mold to form a loop, and the two ends of the tube were slowly pulled down. The total loop length (H) when the loop is kinked is used as an index of the kink resistance characteristic. When the circuit length is short, it means that the kink resistance property is excellent. (Refer to Figure 1)

[0142] [Dynamic viscoelasticity measurement]

[0143] Using the RDS-II manufactured by Rheometric Co., Ltd., in the torsion mode (torsion mode) with a width of 10mm and a length of 38mm, t...

Synthetic example 1

[0163] (syndiotactic polypropylene) (i-1)

[0164] According to the method described in Japanese Patent Laid-Open Publication No. 2-274763, use a catalyst containing dibenzylidene (cyclopentadienyl) fluorenyl zirconium dichloride and methyl aluminoxane (aluminoxane), through hydrogen The melt index of the syndiotactic polypropylene obtained by the bulk polymerization method of propylene in the presence is 4.4g / 10min, and the molecular weight distribution obtained by GPC is 2.3, and the syndiotactic pentad fraction (r.r.r.r) measured by 13C-NMR is 0.823. The Tm as determined by scanning calorimetry was 127°C and the Tc was 57°C.

Synthetic example 2

[0166] (Syndiotactic propylene-ethylene copolymer) (ii-1)

[0167] At normal temperature, 750ml of heptane was added to a 1.5-liter autoclave that was dried under reduced pressure and replaced with nitrogen, and then a 1.0 mmol / ml toluene solution of 0.3ml of triisobutylaluminum (hereinafter, abbreviated as TIBA) was added, so that the conversion was Aluminum atoms in an amount of 0.3 mmol were inserted into 50.7 liters (25°C, 1 atm) of propylene with stirring, and the temperature was raised up to 30°C. Then, pressurize the system so that the pressure of ethylene is 5.5 kg / cm2G, and add a dibenzylidene (cyclopentadienyl) fluorenyl zirconium dichloride heptane solution (0.0002 mM / ml) synthesized by a known method 3.75ml, (triphenylcarbenium tetrakis (pentafluorophenyl) borate) toluene solution (0.002mM / ml) 2.0ml, initiate the copolymerization of propylene and ethylene. The catalyst concentration at this moment is: relative to the whole system, dibenzylidene (cyclopentadienyl) ...

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Abstract

The invention provides a propylene polymer composition well balanced and excellent in transparency, flexibility, heat resistance, scratch resistance and rubber elasticity, and a medical tube made from the propylene polymer composition. The propylene polymer composition satisfies all the following properties (A), (B), (C) and (D): (A) the composition shows a loss tangent (tan´) peak at a temperature in the range of -20 to 25°C according to dynamic viscoelasticity measurement (10 rad / s) in a torsion mode, and the peak is 0.5 or above; (B) the storage elastic modulus G' at 20°C from the dynamic viscoelasticity measurement is in the range of 1.0x10 7 to 4.9x10 8 dyn / cm 2 ; (C) the penetration temperature (°C) determined in accordance with JIS K 7196 is in the range of 60 to 160°C; and (D) the composition has a permanent set of not more than 30% as determined after the composition fixed between chucks 30 mm apart is 100% strained at a stress rate of 30 mm / min, maintained for 10 minutes and released for 10 minutes. The medical tube is made from the propylene polymer composition.

Description

[0001] This case is filed on January 16, 2004 , the application number is 200480002896.1 (PCT / JP2004 / 000292) , the name of the invention is Propylene polymer composition and use thereof divisional application of the patent application. technical field [0002] The invention relates to a flexible medical tube containing a propylene polymer composition suitable for liquid delivery used in medical fields such as blood and transfusions. The transparency, flexibility, and damage resistance of the propylene polymer composition are , heat resistance, excellent rubber elasticity. Background technique [0003] Polypropylene includes isotactic polypropylene, syndiotactic polypropylene, etc. Among them, isotactic polypropylene is widely used in various packaging materials because of its low cost and excellent transparency, rigidity, moisture resistance, and heat resistance. Especially in these isotactic polypropylenes, although the transparency of the ethylene-propylene random co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M39/00A61M39/08A61M25/00A61M5/14A61L29/04C08L23/10C08L23/14
CPCA61L29/041Y10T428/1397C08L2205/02C08L23/142C08L23/10C08L2207/12C08L2666/06C08L23/16C08L2201/10
Inventor 森亮二中川贵加加美守藤堂昭
Owner OTSUKA PHARM FAB INC
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