Rubber compositions containing preciptated organosilicon particles having a core and a shell
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 23, 2003
Grant Date -
Dec 20, 2001
app pub date -
Feb 27, 2001
filing date -
Mar 10, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is disclosed a rubber composition comprising: (a) 100 parts by weight of at least one rubber containing olefinic unsaturation; and (b) 1 to 150 phr of a precipitated organosilicon particles having a core and a shell, wherein the core is obtained by the condensation of at least one monomer of the formula: R.sup.1 --Si(OR.sup.2).sub.3 I where R.sup.1 is selected from the group consisting of hydrogen, methyl, ethyl, vinyl, alkoxy having from 1 to 4 carbon atoms, and phenyl; R.sup.2 is selected from the group consisting of alkyls having from 1 to 4 carbon atoms and phenyl; and wherein said condensation of said monomer is in the presence of a surfactant; and wherein the shell is obtained by the subsequent addition to the core of a monomer of the formula: R.sup.3 --Si(OR.sup.2).sub.3 II where R.sup.3 is selected from the group consisting of --CH.dbd.CH.sub.2, --CH.sub.2 --CH.dbd.CH.sub.2, ##STR1## .paren open-st.CH.sub.2.paren close-st..sub.n SH and mixtures thereof; and n is an integer of from 2 to 8.
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