Procedure for the preparation of a highly durable composite textile material workable at high temperature, and the composite textile material thus obtained
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United States of America Patent
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Dec 5, 2006
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app pub date -
Dec 19, 2002
filing date -
Dec 21, 2001
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Abstract
A high durability composite textile material, like a synthetic suede, is prepared according to a procedure that comprises the impregnation of micro-fibers non-woven fabric substrate with a polyurethane-polyurea solution. This polymer solution, is made by a pre-polymerization phase between diisocyanate and polyols, a dilution phase of the pre-polymer thus obtained and an extension step of the pre-polymer, the extension of the pre-polymer free isocyanate groups is carried out by means water addition.
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