C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
117/113, 117/195
C08K 3/34 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/66 (2006.01) C09D 175/08 (2006.01) D06M 15/564 (2006.01)
Patent
CA 1130033
ABSTRACT OF THE DISCLOSURE A substantially solvent-free fast low temperature curing polyurethane coating composition is disclosed as well as a procedure for synthesizing it and a procedure for applying it to a flexible substrate. It has a long shelf- life yet cures in about 1 to 5 minutes at temperatures of between about 80 and 180°C to give a flexible coating. The composition is a mixture of a polyisocyanate melting at more than about 100°C and a hydroxyl bearing polyurethane prepolymer based upon branched polyethers, monomeric glycols, and polyamines made with a deficit of polyisocyanate. The composition includes a isocyanate addition catalyst and a sodium aluminum silicate type molecular sieve and may include a polyester polyol as an additive or a reactant in forming the prepolymer.
335386
Recker Klaus
Reinecke Gerd
Aktiengesellschaft Bayer
Sherman
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