Organopolysiloxanes having bifunctional terminal siloxane units

Details Organopolysiloxanes having bifunctional terminal siloxane units Organopolysiloxanes having bifunctional terminal siloxane units

C - Chemistry, Metallurgy

08

G

C08G 77/04 (2006.01) B01F 17/54 (2006.01) C04B 41/49 (2006.01) C08G 77/12 (2006.01) C08G 77/38 (2006.01) C08G 77/50 (2006.01) C10M 107/50 (2006.01) D06N 3/12 (2006.01)

Patent

CA 2132266

The present invention relates to the organopolysiloxanes having the formula [R1Si(OSiR22X)2OSiR22O1/2]a[R3SiO1/2]b[R2SiO]c[RSiO3/2]d[SiO2]e (1), where R is optionally substituted C1- to C18-hydrocarbon radicals, R1 is an optionally substituted C6- to C15-hydrocarbon radical having at least one phenyl ring, R2 is a C1- to C3-hydrocarbon radical, X is a hydrogen atom or an organic or organosilicon functional group bonded via a divalent, optionally substituted C2- to C15-hydrocarbon radical, with one or more methylene units of the hydrocarbon radical being able to be replaced by oxygen atoms bonded on both sides to carbon atoms, a is an integer of at least 1 and b, c, d and e are each 0 or a positive integer, and the sum of a, b, c, d and e is at least 3, and the process for the preparation thereof.

La présente invention concerne des organopolysiloxanes de formule [R1Si(OSiR22X)2OSiR22O1/2]a[R3SiO1/2]b[R2SiO]c[RSiO3/2]d[SiO2]e (1), où R correspond à des radicaux hydrocarbonés en C1-C18 facultativement substitués, R1 est un radical hydrocarboné en C6-C15 facultativement substitué comptant au moins un noyau phényle, R2 est un radical hydrocarboné en C1-C3, X est un atome d'hydrogène ou un groupe organique ou organosilicié fonctionnel lié par l'intermédiaire d'un radical hydrocarboné divalent en C2-C15 facultativement substitué, comportant une ou plusieurs unités méthylène du radical hydrocarboné qui peuvent être remplacées par des atomes d'oxygène liés des deux côtés à des atomes de carbone, a est un nombre entier d'au moins 1 et b, c, d et e sont chacun 0 ou un nombre entier positif, et la somme de a, b, c, d et e est d'au moins 3, ainsi que le procédé pour la préparation de ces derniers.

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