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Propylene resin composition for piping member, piping member molded by using same, and multilayer piping member

A technology of acrylic resin and piping parts, applied in the direction of pipes/pipe joints/fittings, pipes, hoses, etc., can solve the problems of inappropriate piping parts, inability to directly use piping parts, and no confirmation.

Inactive Publication Date: 2012-06-13
ASAHI YUKIZAI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be roughly deduced that these conventional propylene-based resin compositions can suppress thermal expansion by adding an inorganic filler to the composition. However, it has not been confirmed that the propylene-based resin composition to which an inorganic filler is added takes into account the effects of pipe parts. required characteristics of technology
Even if the existing technology is used step by step for piping parts, only adding inorganic fillers cannot satisfy the characteristics of piping parts, and in fact it cannot be directly used for piping parts
In addition, creep characteristics, which are important elements of piping components, are not taken into consideration.
Creep characteristics cannot be investigated by short-term tests such as tensile strength and Izod impact strength, and propylene resin compositions with poor long-term creep characteristics are not suitable for piping parts

Method used

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  • Propylene resin composition for piping member, piping member molded by using same, and multilayer piping member
  • Propylene resin composition for piping member, piping member molded by using same, and multilayer piping member
  • Propylene resin composition for piping member, piping member molded by using same, and multilayer piping member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 75 parts by mass of homopolymerization type propylene resin (Mw / Mn=5, MFR0.5) as a propylene resin homopolymer, 20 parts by mass of talc (average particle diameter 4.6 μm, P-4, Nippon Talc Co., Ltd. ) and 5 parts by mass of hydrogenated styrene-butadiene rubber (hereinafter referred to as hydrogenated SBR) (H1062, manufactured by Asahi Kasei Chemicals) were blended, kneaded with a twin-screw extruder, and granulated to obtain an MFR of 0.5 g / 10 minutes of propylene-based resin composition. The obtained resin composition was molded into a tube made of acrylic resin with a thickness of 3.0 mm and an outer diameter of 32 mm using a single-screw extruder at a drum temperature of 220° C., and the tube was used to make test pieces for various tests, and the line Expansion coefficient determination test, tensile test, notched Izod impact test, creep test, welding test. The results are shown in Table 1.

Embodiment 2

[0062] 70 parts by mass of homopolymer propylene resin (Mw / Mn=5, MFR0.5), 20 parts by mass of talc (average particle size 4.6 μm, P-4, manufactured by Nippon Talc Co., Ltd.) and 10 parts by mass of Ethylene-propylene rubber (hereinafter, referred to as EPR) was compounded, and a tube was formed in the same manner as in Example 1, and various evaluation tests were performed. The results are shown in Table 1.

Embodiment 3

[0064] 75 parts by mass of homopolymer propylene resin (Mw / Mn=12, MFR0.5), 20 parts by mass of talc (average particle size 4.6 μm, P-4, manufactured by Nippon Talc Co., Ltd.) and 5 parts by mass of Hydrogenated SBR (H1062, manufactured by Asahi Kasei Chemicals) was blended, a tube was formed in the same manner as in Example 1, and various evaluation tests were performed. The results are shown in Table 1.

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Abstract

Disclosed is a propylene resin composition for piping members essentially containing (a) 65-90 parts by mass of a propylene resin homopolymer, (b) 10-25 parts by mass of a talc having an average particle diameter of 1-10 [mu]m, and (c) 1-10 parts by mass of at least one rubber component selected from ethylene-propylene rubbers, ethylene-butene rubbers, styrene-butadiene rubbers and styrene-isoprene rubbers. This propylene resin composition is characterized in that the MFR after melt-mixing these components (a)-(c) is 0.01-2.00 g / 10 min. Also disclosed are a piping member molded by using such a propylene resin composition and a multilayer piping member.

Description

technical field [0001] The present invention relates to pipes manufactured by extrusion molding, joints, flanges, valves manufactured by injection molding, and outer covers of hydraulic transmission devices, which are suitable for piping lines where high-temperature fluids above 60°C flow. The propylene-based resin composition and the piping parts molded using the composition, in more detail, relate to the fact that due to the low coefficient of linear expansion, especially when using a piping line through which a high-temperature fluid flows, it is possible to suppress the expansion of the piping part in the longitudinal direction due to thermal expansion. Propylene-based resin composition for piping parts that is long-term, excellent in long-term creep properties and less ultraviolet-ray degradation, excellent in long-term service life of piping parts, and good in quality of joint parts obtained by welding construction due to good weldability, used Piping parts and multilaye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K3/34F16L11/04
Inventor 兴梠英裕末留末喜
Owner ASAHI YUKIZAI KOGYO CO LTD