Hydrogenated NBR composition

Details Hydrogenated NBR composition Hydrogenated NBR composition

2008-04-14

2010-12-07

Yoon, Tae H (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S261000, C524S284000, C524S566000, C525S234000, C525S263000

Reexamination Certificate

active

07847008

ABSTRACT:
A hydrogenated NBR composition, which comprises 100 parts by weight of a blend of a hydrogenated NBR having an acrylonitrile content of 25-44% by weight and an iodine number of 32-65, with such an amount of an NBR as to make the iodine number of the blend of 40-160, 2-23 parts by weight of an ester-based plasticizer, and 0.5-10 parts by weight of an organic peroxide, preferably which further contains 0.5-10 parts by weight of a polyfunctional, unsaturated compound, has a distinguished cost performance because of blending an expensive hydrogenated NBR with a cheap NBR, can give cross-linked products having a distinguished oil resistance (resistance to such oil as No. 3 oil and other general-purpose, commercially available engine oil, etc.) and a distinguished fuel oil resistance (resistance to such fuel oil as fuel oil C, and other general-purpose, commercially available gasoline, etc.) and thus can serve as suitable molding materials for intake manifold gaskets of automobile engine or automobile sealing parts, particularly sealing parts around engines and transmission systems.

REFERENCES:
patent: 4560729 (1985-12-01), Watanabe et al.
patent: 4654404 (1987-03-01), Watanabe et al.
patent: 5051480 (1991-09-01), Coran
patent: 2000-212333 (2000-08-01), None
patent: 2001-288303 (2001-10-01), None
patent: WO 2007/094158 (2007-08-01), None

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