Phenylenediamine derivative, production method thereof and antioxidant for rubber using it as effective constituent

US20050159519A1Inactive Publication Date: 2005-07-21NOK CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
NOK CORP
Publication Date
2005-07-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

A phenylenediamine derivative represented by following formula (I) or (II): wherein R1 and R2 each represents a hydrogen atom, a lower alkyl group, or a lower alkoxy group; R3 represents a hydrogen atom or a methyl group; R4 represents a methyl group or an ethyl group; and n and m each is 1, 2, or 3; wherein R1 and R2 each represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, or a cyano group; and n and m each is 1, 2, or 3, is disclosed. These phenylenediamine derivatives are effectively used as antioxidants for rubbers, which scarcely cause vanishing by evaporation or a thermal denaturation even under a high-temperature condition of 150° C. or higher.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to a phenylenediamine derivative, a production method thereof, and an antioxidant for rubber using the phenylenediamine derivative as the effective constituent. More specifically, the present invention relates to a phenylenediamine derivative which is stable at a high temperature of 150° C. or higher, a production method thereof, and an antioxidant for rubber using the phenylenediamine derivative as the effective constituent.

[0002] Also, the present invention relates to an antioxidant for acrylic rubbers. More specifically, the present invention relates to an antioxidant for acrylic rubbers capable of giving an excellent heat aging resistance to an acrylic rubber vulcanization product by using two kinds of antioxidant compounds. BACKGROUND OF THE INVENTION

[0003] In particular, requirements for high temperature resistant materials or for longer life materials has been desired in an automobile industry. In rubber-made mater...

Claims

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