Isocyanto-functional organo silanes and adhesives therefrom

Details Isocyanto-functional organo silanes and adhesives therefrom Isocyanto-functional organo silanes and adhesives therefrom

C - Chemistry, Metallurgy

08

G

400/1100, 400/13

C08G 18/00 (2006.01) C08G 18/28 (2006.01) C08G 18/77 (2006.01) C08G 18/80 (2006.01) C08G 77/26 (2006.01) C08L 83/00 (2006.01) C09J 4/00 (2006.01) C09J 175/00 (2006.01)

Patent

CA 1088696

Compositions comprising at least one isocyanate-functional organo- silane, preferably in combination with at least one polyisocyanate, and, optimally, at least one aromatic nitroso compound have been found to be un- expectedly effective as storage-stable, single-package, one-coat adhesive systems for bonding a variety of elastomeric materials to themselves and other solid substrates, such as metal, fabric, ceramic, and the like substrates. The isocyanatosilanes, employed in the present invention are characterized by the presence of at least one free isocyanate moiety and at least two hydrolyzable groups according to the general formula Image wherein R1 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms, and is preferably selected from the group consisting of alkyl radicals having from 1 to 4 carbon atoms, cycloalkyl radicals having from 4 to 7 ring carbon atoms, aryl radicals havlng 6, 10, or 14 nuclear carbon atoms, and such aryl radicals containing one or more substituent alkyl groups having from 1 to 4 carbon atoms; R2 is a monovalent aliphatic, cycloaliphatic or aromatic organic radical containing from 1 to 8 carbon atoms and is preferably selected from the group consisting of alkyl radicals having from 1 to 4 carbon atoms, Image where R3 is an alkylene group having from 1 to 4 carbon atoms and R4 is an alkyl group having from 1 to 4 carbon atoms; a is zero or 1, and preferably is zero; and Z is a divalent organic radical attached to the silicon atom via a carbon-silicon bond.

233912

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