C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/18 (2006.01) C08J 3/02 (2006.01) C08K 5/5419 (2006.01) C09C 1/28 (2006.01) D06M 15/19 (2006.01)
Patent
CA 2755206
Methods of making a composition are disclosed, which comprises: i) forming a dispersion of particles comprising: a) silica, b) a non- volatile cation, and c) water, wherein the non-volatile cation is not ammonium; ii) adding at least one organosilyl coupling agent of formula R1-(R2- O)3-Si where R1 is selected from the group consisting of a substituted alkyl and unsubstituted alkyl, and R2 is selected from the group consisting of methyl, ethyl, propyl and butyl, wherein the substituted alkyl of R1 is not aminoalkyl; iii) reacting the organosilyl coupling agent with the dispersion of particles to form a mixture comprising a silsesquioxane and an alcohol; and iv) removing the alcohol from the mixture by vacuum distillation, wherein final concentration of the alcohol is about 1% by weight or less of the total mixture. Further disclosed are compositions comprising an aqueous dispersion comprising silsesquioxane, a non- volatile cation and an alcohol, and methods of using the composition.
L'invention porte sur des procédés de fabrication d'une composition, qui comprend les opérations consistant à : i) former une dispersion de particules comprenant : a) de la silice, b) un cation non volatil et c) de l'eau, le cation non volatil n'étant pas l'ammonium ; ii) ajouter au moins un agent de couplage organosilylé de formule R1-(R2-O)3-Si, où R1 est choisi dans le groupe constitué par un alkyle substitué et un alkyle non substitué, et R2 est choisi dans le groupe constitué par méthyle, éthyle, propyle et butyle, l'alkyle substitué de R1 n'étant pas l'aminoalkyle ; iii) faire réagir l'agent de couplage organosilylé avec la dispersion de particules pour former un mélange comprenant un silsesquioxane et un alcool ; et iv) retirer l'alcool du mélange par distillation sous vide, la concentration finale de l'alcool étant d'environ 1 % en poids ou moins du mélange total. L'invention porte en outre sur des compositions comprenant une dispersion aqueuse comprenant du silsesquioxane, un cation non volatil et un alcool, et sur des procédés d'utilisation de la composition.
Bennett Jones Llp
Invista Technologies S.a.r.l.
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