Process for preparation of organosilicon compositions
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United States of America Patent
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-
Jan 28, 2003
Grant Date -
May 16, 2002
app pub date -
Jul 24, 2001
filing date -
Jul 25, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for the preparation of fluid organosilicon compounds usable in adhesive, coating and sealant formulations is described. The process includes the synthesis of organosilicon prepolymer compositions starting from unsaturated polyurethanes obtained in turn from unsaturated monoalcohol polyethers and diisocyanates with a controlled NCO/OH ratio, to which chlorosilanes are added in the presence of methyl or ethyl orthoformates. These organosilicon compositions are able to cross-link through silicon-alkoxy end groups of the type: ##STR1##
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