Thixotropic agent
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United States of America Patent
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Apr 15, 2003
Grant Date -
Jan 17, 2002
app pub date -
May 2, 2001
filing date -
May 2, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
New thixotropic agents for the use in cross-linking systems, in particular one-component adhesives and sealants, are described. The thixotropic agents have the advantage that on the one hand they cause only a minor or no increase in viscosity, and on the other hand they do not cause any blead out or migration, respectively. The thixotropic agents of the present invention are based on urea derivatives that usually are present in a concentration of 5 to 50 wt.-%, in particular of 15 to 30 wt.-%, in a preferably reactive carrier material. After the cross-linking of the system, the reactive carrier material is incorporated, preferably into the structure matrix, or interwoven with said structure matrix, respectively, such that it can not diffuse out of the cured material.
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