ISO 18473-3-2018 pdf free download.Functional pigments and extenders for special application – Part 3: Fumed silica for silicone rubber application. 1. This document specifies requirements and corresponding methods of test for fumed silica in powder form for silicone rubber application. This document is applicable to untreated and surface treated fumed silica. 2. ISO 3262 -20:2000, Extenders for paints – – Specifications and methods of test一Part 20: Fumed silica ISO 9277, Determination of the specific surface area of solids by gas adsorption一BET method ISO 15528, Paints, varnishes and raw materials for paints and varnishes一Sampling ISO 18451-1, Pigments, dyestuffs and extenders一Terminology 一Part 1: General terms 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 18451-1 and the fllowving apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: 一IEC Electropedia: available at https://www.electropedia.org/ 一ISO Online browsing platform: available at https://www.iso.org/obp 3.1 fumed silica amorphous silica produced from silicon halides by high-temperature flame hydrolysis Note 1 to entry: It can be also subjected to further surface treatment. 4 Classification and designation 4.1 Classification Fumed silica is classified as hydrophilic and hydrophobic, according to whether it can be dispersed in water…