US 2019/0338138 A1Published application

Surface-treated silica filler, and resin composition containing surface-treated silica filler

AssigneeNamics Corporation

InventorsAyako SATO, Masashi KAJITA

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Abstract

The present invention provides a surface-treated silica filler for suppressing an increase in viscosity when added to a resin composition used for applications such as a semiconductor sealing material, and the resin composition containing the surface-treated silica filler. The surface-treated silica filler of the present invention is surface-treated with a basic substance having an acid dissociation constant (pKa) of its conjugate acid of 9.4 or more.

Claims10

Dependent claims

A surface-treated silica filler, which is surface-treated with a basic substance having an acid dissociation constant (pKa) of its conjugate acid of 9.4 or more.

Dependencies are inferred from the claim text.

Facts

Application: 16/474,586Filed 28 Nov 2017
Priority: JP 2016-25543028 Dec 2016
Published: 7 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification28 codes

C09C 1/309
Silicic acid: combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
C01B 33/181
Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof: by a dry process
C01B 33/186
Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof: from or via fluosilicic acid or salts thereof by a…
C08K 3/36
Silicon-containing compounds: silica

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US 11,072,710 B2Related patent
US 2019/0338138 A1This patent

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