Compositions for cables filling
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United States of America Patent
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Apr 20, 2004
Grant Date -
May 23, 2002
app pub date -
Oct 9, 2001
filing date -
Oct 10, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to compositions for cables filling wherein a styrene-butadiene block copolymer with radial structure is used as a gelling agent. This polymer is obtained through styrene and butadiene sequential polymerization and subsequent reaction with a coupling agent preferably of type Cl.sub.4-n MR.sub.n, wherein M=Sn or Si, R is an alkyl or aryl group and n is an integer from 0 to 2, and hydrogenation of the resulting polymer. This type of copolymer brings a higher stability to the final properties of the gel as compared with the linear hydrogenated synthetic rubbers usually used in the prior art.
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