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Method for producing finely pulverized fluororubber

A manufacturing method and fluororubber technology are applied in the field of manufacturing micronized fluororubber, which can solve the problems of lowering the pulverization temperature and achieve the effect of preventing mutual adhesion

Active Publication Date: 2010-12-08
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, freeze pulverization has a problem of requiring equipment and energy for lowering the pulverization temperature to a relatively low temperature

Method used

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  • Method for producing finely pulverized fluororubber
  • Method for producing finely pulverized fluororubber
  • Method for producing finely pulverized fluororubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] 100 parts of fluororubber (vinylidene fluoride [VDF] / hexafluoropropylene [HFP] copolymer, copolymer composition (molar ratio): VDF / HFP=78 / 22, number average molecular weight 46000) and 2 parts of talc (Japanese talc company production) into the cutting mill (Rapid R1528, カワタ company production), utilize the sieve cloth that has the hole of diameter 3mm, obtain the mixture (1) of the fluorine rubber powder body and the talc that particle diameter is 1mm~3mm.

[0143] Add 8 parts of the above-mentioned talc to the obtained mixture (1), pre-mix in a container to obtain the mixture (2), use a quantitative feeder, and put the mixture (2) into a disc grinder with a drum outer diameter of 300 mm (Turbo Grinder TG300; manufactured by Matsubo Co., Ltd.), the gap between the discs was adjusted to 0.3 mm, and the number of revolutions was set to 6500 rpm, and fine pulverization was performed under these conditions. The micronized fluororubber that comes out of the gap is sucked an...

Embodiment 2

[0146] As a disc grinder, a turbo grinder TG300 (manufactured by Mazubo Corporation) was used, except that the gap between the discs was adjusted to 0.2 mm, and a micronized fluororubber was obtained in the same manner as in Example 1.

Embodiment 3

[0148] As a disc grinder, a disc grinder PM300 (manufactured by Makino Sangyo Co., Ltd.) was used, the number of revolutions was set to 9000 rpm, and the gap between the discs was adjusted to 0.4 mm, and the operation was carried out in the same manner as in Example 1. , to obtain micronized fluororubber.

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Abstract

A method for producing a finely pulverized fluororubber, characterized in that it has a finely pulverizing step of subjecting a fluororubber powder to a finely pulverizing treatment in a temperature atmosphere of the glass transition temperature of a fluororubber constituting the fluororubber powder or higher and a temperature being higher by 100 DEG C than the above glass transition temperature or less. The above method can be suitably used for producing a finely pulverized fluororubber by a method which can be practiced even at an ordinary temperature, instead of a refrigeration pulverization temperature.

Description

technical field [0001] The present invention relates to a method for producing a micronized fluororubber, a micronized fluororubber, a composition for molding, a masterbatch, and a molded article. Background technique [0002] Fluororubber is excellent in heat resistance, oil resistance, chemical resistance, etc., so it is not only used for processing into molded articles, but also used as a powder coating material (see, for example, Patent Document 1). In addition, adding a small amount of fluororubber to resins such as polyethylene can improve the moldability of the resin, so fluororubber can be used as a processing aid; Modification, functionalization, etc. of fluororubber are performed using polymer blends such as silicone rubber (for example, see Non-Patent Document 1). In these applications, fluorine rubber is usually used as a powder. [0003] As the pulverization method of fluororubber, the following method is known: the method of spray-drying the fluororubber aque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08J3/22C08L23/00C08L27/12
CPCC08F214/22C08J2427/00C08J2327/12C08J3/226C08F214/26C08J2423/00C08J3/124
Inventor 宫森强小宫良司尔乾邦彦
Owner DAIKIN IND LTD