02-05-2019 дата публикации
Номер: US20190127587A1
Принадлежит:
An aqueous dispersion comprising a surface-modified hydrophilic mixed oxide powder comprising silicon and aluminum and water, characterized in that 128-. (canceled)29. An aqueous dispersion comprising a surface-modified hydrophilic mixed oxide powder comprising silicon and aluminum , wherein:a) the surface of particles in the powder has Si and Al atoms;b) the surface modification comprises an Si atom bound to a hydrocarbon radical by a C atom; andc) the carbon content of the surface-modified mixed oxide powder is 3-25% by weight.30. The aqueous dispersion of claim 29 , wherein the Si atom which is bound to the hydrocarbon radical by a C atom forms —Si—O—Al— bonds claim 29 , the Al atom being a constituent of the particle surface.31. The aqueous dispersion of claim 29 , wherein the AlO/SiOweight ratio in the surface-modified mixed oxide powder is 0.1:99.9-5:95.32. The aqueous dispersion of claim 29 , wherein the (AlO/SiO)/(AlO/SiO)is 0.1-10.33. The aqueous dispersion of claim 29 , wherein the surface-modified mixed oxide powder is present predominantly or completely in the form of aggregated particles.34. The aqueous dispersion of claim 29 , wherein the surface-modified mixed oxide powder has a median particle diameter din the aqueous dispersion of 40-200 nm.35. The aqueous dispersion of claim 29 , wherein the hydrocarbon radical bonded to an Si atom by a C atom is interrupted by one or more heteroatoms.36. The aqueous dispersion of claim 29 , wherein the surface modification has the formula Si—(CH)—Y—R claim 29 , wherein Si is the Si atom bound to a hydrocarbon radical by a C atom and:n=1, 2 or 3 and m=0 or 1;{'sup': 1', '2', '3', '4', '1', '2', '3', '4', '1', '2', '3', '4', '5', '6', '1', '2', '3', '4', '5', '6, 'sub': o', '3', 'p', '3', '2', '2', '2', '2', '2', '2', '2', '2', '2', '2, 'Y═—(OCRR—CRR)—, wherein o=1-30 and R, R, R, R=independently of one another H or CH; or —(OCRR—CRR—CRR)—, wherein p=1-30 and R, R, R, R, R, R=independently of one another H or CH, — ...
Подробнее