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AssigneeEvonik Operations GmbH
InventorsThomas Rosen, Michael Ferenz, Matthias Lobert, Carsten Schiller, Frauke Henning
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Hexamethylcyclotrisiloxane is used in an equilibration reaction with at least one poly(methylhydrogen)siloxane in the presence of at least one equilibration catalyst to form a poly(methylhydrogen)-polydimethylsiloxane copolymer. A content of at least 0.5 wt.-% of hexamethylcyclotrisiloxane can decrease the equilibration reaction time to provide a statistical equal distribution of the SiH functionalities of the poly(methylhydrogen)-polydimethylsiloxane copolymer. The produced poly(methylhydrogen)-polydimethylsiloxane copolymer can be used to produce polyether polydimethylsiloxane that can be used as stabilizers for polymer foams, such as polyurethane foams.
A method of manufacturing, comprising:
A foam stabilizer, comprising:
An equilibration reaction of a cyclic-polydimethylsiloxane-containing composition with at least one poly(methylhydrogen)siloxane in the presence of at least one equilibration catalyst, the equilibration reaction comprising:
Dependencies are inferred from the claim text.