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Synthesis of New Cellobiose-Based Glycopolysiloxanes and their Use as Polymer Stabilizers in Miniemulsion Polymerisation

✍ Scribed by Solenn Berson; D. Viet; Sami Halila; Hugues Driguez; Etienne Fleury; Thierry Hamaide

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
337 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

New glycopolysiloxanes were synthesized from cellobiose and commercially available reactive silicone oils or MD′M precursors. Their synthesis is based on the hydrosilylation of allyl‐functionalized cellobiose onto the reactive silicone oil, after protection of the hydroxyl functions. The subsequent deprotection step leads to a redistribution of the silicon chain to yield oligomers with around 5 or 6 silicon atoms. Two water‐dispersible glycosiloxanes were used for the steric stabilisation of vinyl acetate (VAc) miniemulsion polymerisation with up to 10% Miglyol® as the hydrophobic component. The best performances were obtained by using a mixture of non‐ionic triblock copolymer and glycopolysiloxane. Poly(vinyl acetate) (PVAc) latex with particle sizes around 200 nm were obtained, displaying colloidal stabilisation upon long‐time storage.

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