Rubbery heat resistant composition
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Nov 19, 1999
filing date -
Nov 19, 1999
priority date (Note) -
Expired
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Abstract
This invention relates to a polymeric composition that can be molded into rubbery articles having excellent oil resistance and excellent heat resistance. The properties of the polymeric composition of this invention are similar to those of hydrogenated nitrile rubber. However, the polymeric compositions of this invention offer a significant economic advantage over traditional hydrogenated nitrile rubbers. This is because the polymeric compositions of this invention are made by blending hydrogenated nitrile rubber with a much less expensive rubbery polymer. Unexpectedly, the physical properties of the polymeric blends of this invention are very similar to those of pure hydrogenated nitrile rubbers. This invention more specifically discloses a polymeric composition having excellent heat and excellent oil resistance which is comprised of (1) from about 2 to about 50 parts by weight of a rubbery polymer which is comprised of repeat units which are comprised of (a) butyl acrylate, (b) at least one member selected from the group consisting of methyl methacrylate, ethyl methacrylate, methyl acrylate and ethyl acrylate, (c) acrylonitrile, (d) styrene, and (e) a crosslinking agent; and (2) from about 50 to about 98 parts by weight of a hydrogenated nitrile rubber.
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