Peroxide-curable fluoroelastomer composition

A technology of organic peroxides and elastomers, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, which can solve the problem of increased viscosity of the composition, poor compression set rate, and kneadability. Problems such as poor liquidity
CN1989202AActive Publication Date: 2007-06-27DAIKIN IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAIKIN IND LTD
Publication Date
2007-06-27

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Abstract

The invention provides a peroxide-curable fluoro- elastomer composition which is remarkably improved in the fluidity and thereby exhibits improved processabilty, though conventional fluoroelastomer compositions could be molded only by a molding process problematic in productivity, i.e., compression molding or transfer molding which was widely used in the prior art. Further, the invention provides molded articles obtained by curing the composition as well as a fluoroelastomer composition permitting high filler loading. Specifically, a fluoroelastomer composition which comprises (A) a fluoroelastomer composed of structural units derived from vinylidene fluoride and / or tetrafluoroethylene and structural units derived from at least one other monomer and having (a) a number-average molecular weight (Mn) of 30,000 to 70,000g / mol and (b) an iodine content of 0.3 to 1.0 wt% and (B) a curing agent consisting of an organic peroxide.
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Description

technical field

[0001] The present invention relates to a fluoroelastomer composition capable of peroxide vulcanization, having excellent flowability and improved processability, and a molded article obtained by vulcanizing the composition. Background technique

[0002] Vinylidene fluoride-hexafluoropropylene (VdF-HFP) or tetrafluoroethylene (TFE)-perfluoro(alkyl vinyl ether) fluoroelastomers, because they exhibit excellent chemical resistance, solvent resistance Performance, heat resistance, as circular rings, gaskets, hoses, valve stem seals, shaft seals, diaphragms, etc. used in harsh environments, are widely used in the automotive industry, semiconductor industry, chemical industry and other fields.

[0003] As a fluoroelastomer used in these applications, there is an iodine-containing fluoroelastomer having a highly reactive iodine atom at a molecular terminal. This iodine-containing fluoroelastomer can have excellent vulcanization efficiency due to the iodine atom at ...

Claims

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