US 12,344,727 B2
Silica suspension in an organic solvent and method for its manufacture
Thomas Chaussee, Cailloux-sur-Fontaines (FR); Frédéric Magnin-Feysot, Saint Pierre de Chandieu (FR); Hélène Fay, Bordeaux (FR); Loïc Baussaron, Serpaize (FR); and Jean-Claude Le Thiesse, Plouhinec (FR)
Assigned to RHODIA OPERATIONS, Aubervilliers (FR)
Appl. No. 16/965,987
Filed by RHODIA OPERATIONS, Aubervilliers (FR)
PCT Filed Jan. 30, 2019, PCT No. PCT/EP2019/052260
§ 371(c)(1), (2) Date Jul. 29, 2020,
PCT Pub. No. WO2019/149757, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 18305103 (EP), filed on Feb. 1, 2018.
Prior Publication US 2020/0362138 A1, Nov. 19, 2020
Int. Cl. C08K 3/36 (2006.01); C01B 33/145 (2006.01); C08J 3/215 (2006.01); C09C 1/30 (2006.01)
CPC C08K 3/36 (2013.01) [C01B 33/145 (2013.01); C08J 3/215 (2013.01); C09C 1/3018 (2013.01); C01P 2004/62 (2013.01); C01P 2006/22 (2013.01); C08K 2201/005 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A suspension of silica particles comprising:
a liquid [liquid (L)] selected from the group consisting of the linear or branched, saturated or unsaturated, aliphatic and cycloaliphatic hydrocarbons having from 6 to 30 carbon atoms and of the aromatic hydrocarbons having from 6 to 10 carbon atoms,
silica particles, wherein the silica particles are precipitated silica particles, and
at least one compound [compound (S)] selected from the group consisting of:
the acid phosphate esters of formula (I)
P(O)((OCH2CH2)nOR)a(OM)b  (I)
wherein:
R represents a linear or branched, saturated or unsaturated, aliphatic hydrocarbon group having from 1 to 24 carbon atoms or an aromatic hydrocarbon having from 6 to 24 carbon atoms; M is H, Na or K, n is an integer from 4 to 8;
a is an integer equal to 1 or 2, and b is 3-a;
characterised in that said compound(S) is miscible in liquid (L) in the temperature range from 20° C. to 50° C.