REACTIVE SILICON OXIDE FLAKES

摘要

The present invention is directed to a product, obtainable by reacting a SiO<SUB>y</SUB> flake, or a material comprising a SiO<SUB>y</SUB> layer with 0.70 = y = 1.95, especially 0.70 = y =1.80, very especially 1.0 = y = 1.8 with a protic substance, such as water, or a protic organic solvent to generate Si-H, Si-H<SUB>2</SUB> and/or a-Si:H groups and reacting the obtained intermediate with a compound having functional groups that can react with Si-H, Si-H<SUB>2</SUB> and/or a-Si:H groups and a process for their production. By using the Si-H group as anchor on the surface for organic compounds hazardous reducing agents like lithium aluminum hydride, borane or hydrogen can be avoided for reductive grafting methods. Organic and inorganic compounds, such as, for example, colorants, or additives, such as, for example, UV absorbers, or photoinitiators, or polymers can immobilized. The modified flakes can be used in coatings, plastics, fibres etc.