C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/12 (2006.01) C03C 25/24 (2006.01) C03C 25/26 (2006.01) C08G 18/28 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01) D04H 1/64 (2006.01)
Patent
CA 2041249
Mo-3446 PU-324 AQUEOUS POLYISOCYANATE DISPERSIONS AND THEIR USE FOR THE PRODUCTION OF FIBERGLASS MATS ABSTRACT OF THE DISCLOSURE The present invention is directed to an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) chain extending the dispersed polyisocyanate with a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.6:1.0 to 0.95:1Ø The present invention is also directed to a process for the preparation of a fibrous mat by treating fibers with the dispersed polyisocyanate before the isocyanate content of the dispersed polyisocyanate is less than 0.5% by weight, based on the weight of the polyisocyanate. Finally, the present invention is directed to the fibrous mats obtained in accordance with this process.
Markusch Peter H.
Sarpeshkar Ashok M.
Corporation Bayer
Swabey Ogilvy Renault
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