Method of preparation of foams permeable to the fluid containing small quantities of aromatic amines may lose their

摘要

P the present invention relates to the polyurethane foams. / p & & p & the invention relates more particularly the elimination of residual materials may be a risk for the health of the foams hydrophilic. This object is achieved by including either in the reaction mixture in the case of the process in one pass, or in the mixture of a prepolymer and water, in the case of the process according to the prepolymer, an acceptor, more particularly, an aliphatic isocyanate, such as 4,4 - methylene chloride - biscyclohexyldiisocyanate. / p & & p & the invention is more particularly usable for the preparation of foams which can come into contact with the human body, in particular when used in surgery. / p