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Fluorine-containing elastomer composition, its production method, molded article, cross-linked article, and covered electric wire

A technology for covering electric wires and manufacturing methods, applied to conductors, circuits, insulators, etc., can solve the problems of reduced flexibility and elongation, and achieve excellent moldability and heat discoloration resistance

Active Publication Date: 2017-09-15
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Document 3, when too much ETFE is blended in the TFE / P copolymer, the flexibility and elongation decrease, so the compounding amount of ETFE is set to 40% by mass or less with respect to the entire polymer blend

Method used

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  • Fluorine-containing elastomer composition, its production method, molded article, cross-linked article, and covered electric wire
  • Fluorine-containing elastomer composition, its production method, molded article, cross-linked article, and covered electric wire
  • Fluorine-containing elastomer composition, its production method, molded article, cross-linked article, and covered electric wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0222] [Examples 1 to 6, and Comparative Examples 1 to 9]

[0223] Using an internal mixer, each of the above-mentioned materials was sufficiently kneaded (melt-kneaded) according to the compounding parts (mass basis) shown in Tables 1 to 4, respectively, to obtain the fluoroelastomer composition of each example.

[0224] The temperature of the kneading is set so that the kneading state is good. Specifically, the temperature and time of kneading were set to 240°C×10 minutes in Examples 1 to 6, and 270°C×10 minutes in Comparative Examples 1 to 16, and the rotor speed was set in all examples. It is 150rpm.

[0225] Next, the obtained fluoroelastomer composition was press-molded under the conditions of 250° C.×15 minutes and 10 MPa to produce a sheet having a thickness of about 1 mm. Then, each sheet was subjected to electron beam crosslinking at an irradiation dose of 120 kGy to prepare crosslinked samples of each example.

[0226] [Observation of fluoroelastomer composition]

[0227] ...

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Abstract

The present invention provides a fluoroelastomer composition excellent in heat discoloration resistance and moldability, and a molded article, a crosslinked article, and a covered electric wire using the fluoroelastomer composition. A fluorine-containing elastomer composition, characterized in that it contains fluorine-containing rubber (a) and fluorine-containing copolymer (b), and the aforementioned fluorine-containing copolymer (b) contains tetrafluoroethylene-based units (A) and ethylene-based unit (B), the molar ratio [(A) / (B)] of the aforementioned unit (A) to the aforementioned unit (B) is 25 / 75 to 80 / 20, and the crystallization temperature of the aforementioned fluorine-containing copolymer (b) is 100-210°C, the melt flow rate is 0.1-1000g / 10min, and the mass ratio [(a) / (b)] of the aforementioned fluorine-containing rubber (a) to the aforementioned fluorine-containing copolymer (b) is 80 / 20- 20 / 80.

Description

Technical field [0001] The present invention relates to a fluorine-containing elastomer composition, a method for producing the same, a molded product, a crosslinked product, and a covered electric wire. Background technique [0002] Tetrafluoroethylene / propylene copolymer (hereinafter, sometimes referred to as "TFE / P copolymer") has excellent properties such as heat resistance, oil resistance, chemical resistance, electrical insulation, flexibility, etc., and can be used for radiation crossing Connected elastomer materials are used in hoses, tubes, gaskets, seals, diaphragms, sheets, wire coating materials, etc. [0003] In addition, in order to supplement the characteristics of the TFE / P copolymer, an ethylene / tetrafluoroethylene copolymer (hereinafter, sometimes referred to as "ETFE") is blended with the TFE / P copolymer. [0004] For example, in Patent Document 1, ETFE is blended with a TFE / P copolymer to improve mechanical properties such as tensile strength and tear strength, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08J3/20C08L63/00H01B3/28H01B3/44H01B7/02
CPCC08J3/20C08L27/18C08L63/00H01B3/28H01B3/44H01B3/445C08J2327/18C09D127/12C09D127/18C08L27/12C08L2205/02H01B3/441C08L27/20
Inventor 田口大辅安田智子佐藤崇
Owner ASAHI GLASS CO LTD
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