Alkylated aryl disulfonic acid catalysts for crosslinking polyethylene
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United States of America Patent
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May 28, 2002
Grant Date -
Mar 21, 2002
app pub date -
Jul 19, 2001
filing date -
Aug 3, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a highly active condensation catalyst suitable for the crosslinking of alkoxysilanyl polyolefins, e.g., silane functional polyethylene, selected from the group consisting of: (i) an alkylated aryl disulfonic acid selected from the group consisting of sttucture I ##STR1## and structure II ##STR2## wherein each of R.sub.1 and R.sub.2 is the same or different and is a linear or branched alkyl group with 6 to 16 carbons, y is 0 to 3, z is 0 to 3 with the proviso that y+z is 1 to 4, X is a divalent moiety selected from the group consisting of --C(R.sub.3)(R.sub.4)--, wherein each of R.sub.3 and R.sub.4 is H or independently a linear or branched alkyl group of 1-4 carbons and n is 1; --C(.dbd.O)--, wherein n is 1; --O-- wherein n is 1; --S--, wherein n is 1 to 3; and --S(O).sub.2 --, wherein n is 1; (ii) a derivative of (i) selected from the group consisting of the anhydrides, esters, epoxy blocked sulfonic acid esters, acetylates, and amine salts thereof which is hydrolyzable to the alkylated aryl disulfonic acid.
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