B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
6/212, 134/51
B01J 13/00 (2006.01) C01B 33/14 (2006.01) C01F 5/28 (2006.01) C09C 1/02 (2006.01)
Patent
CA 2291812
A sol comprising silica-magnesium fluoride hydrate composite colloidal particles used in an anti-reflection coating material for forming an anti-reflection coating and a process for its preparation are provided. A sol comprising silica-magnesium fluoride hydrate composite colloidal particles having a ratio of silica to magnesium fluoride hydrate MgF2.cndot.nH2O, n being in the range between 0.25 and 0.5, in terms of a SiO2/MgF2 weight ratio of from 0.01 to 5 and a primary particle size of 5 to 50 nm. A process for the preparation of an aqueous sol comprising silica-magnesium fluoride hydrate composite colloidal particles which comprises the steps of adding an aqueous fluoride solution to a mixture liquid of a silica sol and an aqueous magnesium salt solution to produce a slurry of an agglomerate comprising silica-magnesium fluoride hydrate composite colloidal particles and removing the salts formed as by-products. A process for the preparation of an ogranosol further comprising the step of replacing water in the aqueous sol with an organic solvent.
Koyama Yoshinari
Suzuki Keitaro
Tanegashima Osamu
Watanabe Yoshitane
Nissan Chemical Industries Ltd.
Ridout & Maybee Llp
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