C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/21 (2006.01) C08G 77/04 (2006.01) C08G 77/48 (2006.01)
Patent
CA 2051268
An organocyclosiloxane is disclosed which has both silicon-bonded alkoxy groups and organofunctional groups within each molecule. This cyclic siloxane finds utility as a coupling agent and has the general formula <see fig. 1> wherein R1 is independently selected from the group consisting of a monovalent hydrocarbon group having 1 to 8 carbon atoms and a monovalent halogen-substituted hydrocarbon group having 1 to 8 carbon atoms, R2 is selected from the group consisting of an alkoxy group and an alkoxysilylalkyl group, R3 is an organofunctional group selected from the group consisting of glycidoxyalkyl groups, methacryloxyalkyl groups, N-(trialkylsilyl)aminoalkyl groups, (hydroxyphenyl)alkyl groups, and haloalkyl groups and n and m each represent an integer having a value of 1 to 6 with the proviso that n + m is an integer with a value of 3 to 8.
Divulgation concernant un organocyclosiloxane renfermant à la fois des groupes alcoxy liés au silicium et des groupes organofonctionnels à l'intérieur de chaque molécule. Ce siloxane cyclique est utile comme agent de couplage et correspond à la formule générale <voir fig.1>, où : R1 est choisi indépendamment parmi un groupe hydrocarboné monovalent de 1 à 8 atomes de carbone et un groupe hydrocarboné monovalent de 1 à 8 atomes de carbone avec substitution par un halogène; R2 est choisi parmi un alcoxy et un alcoxysilylalkyle; R3 est un groupe organofonctionnel choisi parmi des groupes glycidoxyalkyle, méthacryloxyalkyle, N-(trialkylsilyl)aminoalkyle, (hydroxyphényl)alkyle et haloalkyle; n et m représentent chacun un entier de 1 à 6, à la condition que la somme n + m soit un entier de 3 à 8.
Akamatsu Shoji
Enami Hiroji
Dow Corning Toray Silicone Company Limited
Gowling Lafleur Henderson Llp
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