Process for making siloxane oligomer
OwnerSlawomir Rubinsztajn, Witold Fortuniak +2inventors
InventorsSlawomir Rubinsztajn, Witold Fortuniak, Julian Chojnowski, Jan Kurjata
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Abstract
A process for making a Si—H functional siloxane oligomer from the reaction between silicon hydride compositions and cyclic siloxane oligomer in the presence of a Lewis acid is provided. The Lewis acid is operable to interact with the hydrogen of the silicon hydride to promote ring opening of the cyclic siloxane oligomer and the insertion a siloxane oligomer segment between Si and H atom to thereby form the Si—H functional siloxane oligomer.
Claims29
A process for making a Si—H functional siloxane oligomer, comprising:
- reacting at least one of a silicon hydride or a Si—H functional siloxane with both a cyclic siloxane oligomer and a Lewis acid, wherein a pendant hydrogen of the silicon hydride or of the Si—H functional siloxane promotes ring opening of the cyclic siloxane oligomer to form a polysiloxane segment, and the polysiloxane segment inserts between the hydrogen and the silicon atom from which the hydrogen was pendant.
A process, comprising:
- interacting one or both of a silicon hydride or of a Si—H functional siloxane with a Lewis acid, the Lewis acid being operable to interact with a hydrogen that is pendant from a silicon atom of at least one of the silicon hydride or of the Si—H functional siloxane;
- opening a ring of a cyclic siloxane oligomer using the interacted hydrogen to form a polysiloxane segment;
- inserting the polysiloxane segment between the interacted hydrogen and the silicon atom to form a telomer;
- and
- reacting the telomer with at least another cyclic siloxane oligomer.
A siloxane oligomer comprising the reaction product of:
- a silicon hydride or a Si—H functional siloxane, wherein the silicon hydride and the Si—H functional siloxane have a hydrogen that is pendant from a silicon atom;
- a cyclic siloxane oligomer;
- and
- a Lewis acid that is operable to interact with the pendant hydrogen, wherein the interaction enables the hydrogen to promote a ring opening of the cyclic siloxane oligomer to form a polysiloxane segment that is insertable between the pendant hydrogen and the silicon atom.
Dependencies are inferred from the claim text.