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Method of producing base compound for liquid fluoroelastomer

US8969451B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8969451-B2
Application numberUS-201213468233-A
CountryUS
Kind codeB2
Filing dateMay 10, 2012
Priority dateMay 31, 2011
Publication dateMar 3, 2015
Grant dateMar 3, 2015

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  1. Title

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  2. Abstract

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  5. First independent claim

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Abstract

Official abstract text for this publication.

A method of producing a base compound for a liquid fluoroelastomer which is unaffected by the storage state of the added silica powder, and yields minimal fluctuation in the viscosity between production lots. Specifically, a method of producing a base compound for a liquid fluoroelastomer containing: (A) a linear fluoropolyether compound having at least two alkenyl groups within each molecule and having a perfluoroalkyl ether structure within the main chain, and (B) a hydrophobic silica powder, the method including: (1) heating the component (A) under normal pressure at a temperature of 50 to 100 ° C., (2) adding 20 to 60 parts by mass of the component (B) to 100 parts by mass of the component (A) that has been heated in step (1) while performing kneading to obtain a kneaded product, and (3) kneading the kneaded product obtained in step (2) at a temperature exceeding 100° C., either under conditions of heat and reduced pressure or under conditions of heat and pressure.

First claim

Opening claim text (preview).

What is claimed is: 1. A method of producing a base compound for a liquid fluoroelastomer comprising: (A) a linear fluoropolyether compound having at least two alkenyl groups within each molecule and having a perfluoroalkyl ether structure within the main chain, and (B) a hydrophobic silica powder, the method comprising: (1) heating the component (A) under normal pressure at a temperature within a range of from 50 to 100° C, (2) adding 20 to 60 parts by mass of the…

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What does patent US8969451B2 cover?
A method of producing a base compound for a liquid fluoroelastomer which is unaffected by the storage state of the added silica powder, and yields minimal fluctuation in the viscosity between production lots. Specifically, a method of producing a base compound for a liquid fluoroelastomer containing: (A) a linear fluoropolyether compound having at least two alkenyl groups within each m…
Who is the assignee on this patent?
Shiono Mikio, Ide Shinichi, Taira Yujiro, and 1 more
What technology area does this patent fall under?
Primary CPC classification C08K9/06. Mapped technology areas include Chemistry & Metallurgy.
When was this patent published?
Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).