Silica sol composition with excellent dispersibility to cyanate resin, and preparation method therefor
AssigneeLG Chem, Ltd.
InventorsHee-Jung Choi, Hyung-Kee Kim, Seong-Kyun Kang, Hyeon Choi
Life of this patent
Estimating the term…
Abstract
Disclosed are a silica sol composition including silica, an anionic dispersant, two or more epoxy silane coupling agents, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and two or more epoxy silane coupling agents, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.
Claims20
A silica sol composition comprising silica, an anionic dispersant, two or more epoxy silane coupling agents, and an organic solvent,
- wherein said epoxy silane coupling agents are each included in an amount of 0.03 to 3 wt % based on the total content of the composition.
A method for preparing a surface-modified silica sol composition, the method comprising:
- (a) dissolving an anionic dispersant in an organic solvent, and then adding silica thereto to prepare a silica dispersion;
- (b) adding a first epoxy silane coupling agent to the silica dispersion to which the anionic dispersant is added to modify a surface thereof;
- and
- (c) further introducing a second epoxy silane coupling agent into the surface-modified silica dispersion in Step (b) to modify a surface of silica,
- wherein said epoxy silane coupling agents are each included in an amount of 0.03 to 3 wt % based on the total content of the composition.
A varnish composition comprising a silica sol composition and a cyanate resin, wherein the silica sol composition comprises silica, an anionic dispersant, two or more epoxy silane coupling agents, and an organic solvent.
Dependencies are inferred from the claim text.