Procedure for the preparation of a highly durable composite textile material workable at high temperature, and the composite textile material thus obtained
AssigneeAlcantara S.P.A.
InventorsAndrea Bellucci, Walter Cardinali, Enzo Cicotti, Salvatore Consoli
Life of this patent
Estimating the term…
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.
Claims20
A method for producing a micro-porous, compact material with high durability performance comprising:
- impregnating a non-woven felt with a polyurethane including soft segments and hard segments during a dilution step, the polyurethane resistant to treatment at temperatures above about 250° C., wherein the soft segments comprise a mixture of polycarbonate-polyols and polyester-polyols, and the hard segments comprise ureic groups derived from a reaction between free isocyanate groups and water, thereby forming an extension agent during the reaction.
Dependencies are inferred from the claim text.