| 摘要 |
The present invention provides a hydrophobic core-shell silica particle which is added into a water-insoluble medium such as an organic medium or resin and does not cause opacity and whitening, etc. in a system obtained through adding the hydrophobic core-shell silica particles into the water-insoluble medium or prevent gelation in the added system, a hollow silica particle and manufacturing methods thereof. The core-shell silica particle is provided with a shell layer and a core which comprises a rein that is obtained through emulsion polymerization. The shell layer comprises the following components: a component (A) which is silicon dioxide that is represented by a constitution formula SiO2; a component (B) which is modified silicon oxide that is represented by a constitution formula of general formula (2) or a constitution formula of general formula (1) and general formula (2); and a component (C) which is modified silicon oxide that is represented by a constitution formula of general formula (3). In the general formula (1), R represents an alkyl which has a total carbon atom number of 1-24 and is substituted by a random group selected from amino group, sulfhydryl, (methyl)acrylic group and epoxy group; or a halogenated alkyl with 1-24 carbon atoms. In the general formula (2), R' represents an alkyl which has a total carbon atom number of 1-24 and is represented by a random group selected from amino group, sulfhydryl, (methyl)acrylic group and epoxy group; or a halogenated alkyl with 1-24 carbon atoms. In the general formula (3), R'' represents an alkyl which has a total carbon atom number of 1-24 and is substituted by a random group selected from amino group, sulfhydryl, (methyl)acrylic group and epoxy group; or a halogenated alkyl with 1-24 carbon atoms. The general formulae (1), (2) and (3) are as follows: RSiO3/2 (1), R'2SiO (2), R'' 3SiO1/2. |
