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RESEARCH PRODUCT

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The synthesis of linear carbohydrate modified polysiloxanes has been successfully performed by hydrosilation of functionalized and protected carbohydrate derivates. The functionalization (allyl glycosilation) may be applied to a wide variety of reducing carbohydrates. In this study, mono-, di- and oligosaccharides were converted by a simple two-step reaction (β-acetylation and allyl glycosilation) into active compounds, allowing the polymer analogous addition to random poly[dimethyl-co-hydromethyl]siloxanes (hydrosilation). By variation of the Si–H amount in the starting polymers, polysiloxanes with 1.5% to 56% (by weight) carbohydrate content were prepared. At small degrees of substitution the modified polysiloxanes remain soluble in non-polar media. With increasing carbohydrate content the polymers become more and more soluble in polar solvents like isopropanol or methanol. A polysiloxane with 29% maltose modified comonomeric units (56 wt.-% carbohydrate content) was fully water soluble.