Composite structure with one or several polyurethane layers, method for their manufacture and use thereof
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United States of America Patent
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Jul 10, 2007
Grant Date -
Feb 3, 2005
app pub date -
Aug 27, 2004
filing date -
Jul 7, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composite structure is disclosed. The structure includes one or several polyurethane layers, a support layer, in particular a textile support layer, as well as an optional adhesive layer placed between these layers. The composite structure is characterized in that at least one of the polyurethane layers contains a polyurethane having the formula (I) ##STR00001## wherein O--R.sup.1--O-- is the radical of a polyole with primary and/or secondary hydroxyl functional end groups, R.sup.1 and R.sup.2 independently represent an organic radical which includes aliphatic, cyclo-aliphatic, aromatic and/or heterocyclic groups, and n is an integer number between 1 and 50,000. Also disclosed is a method of manufacturing the composite structure and its use as imitation leather.
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