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US 9,284,413 B2Granted
Process to produce stable alkoxy terminated aminofunctional silicone fluids
AssigneeWacker Chemical Corporation
InventorMichael Larson
Life of this patent
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Abstract
T-aminoalkyl-functional organopolysiloxanes with defined viscosity can be reproducibly prepared without gelling by condensing an organopolysiloxane containing at least two Si-bonded hydroxyl groups with an aminoalkyltrialkoxysilane in the presence of an organic compound bearing one or more hydroxyl groups.
Claims15
A process for producing aminoalkyl-functional organopolysiloxanes, without gelation, comprising:
- condensing at least one organopolysiloxane (A) bearing at least two silanol groups with an aminoalkyltrialkoxysilane (B) in the substantial absence of water, and, prior to or during condensing, adding an effective amount of a gelation-preventing hydroxyl group-containing substance other than organopolysiloxanes (A), and recovering a liquid aminoalkyl-functional organopolysiloxane wherein the hydroxyl group-containing substance is a C1-4 alkanol.
A process for producing aminoalkyl-functional organopolysiloxanes, without gelation, comprising:
- condensing at least one organopolysiloxane (A) bearing at least two silanol groups with an aminoalkyltrialkoxysilane (B) in the substantial absence of water, and, prior to or during condensing, adding an effective amount of a gelation-preventing hydroxyl group-containing substance other than organopolysiloxanes (A), and recovering a liquid aminoalkyl-functional organopolysiloxane, wherein the hydroxyl group containing substance comprises at least one of an alcohol, glycol, alkanolamine or monosilanol.
A process for producing aminoalkyl-functional organopolysiloxanes, without gelation, comprising:
- condensing at least one organopolysiloxane (A) bearing at least two silanol groups with an aminoalkyltrialkoxysilane (B) in the substantial absence of water, and, prior to or during condensing, adding an effective amount of a gelation-preventing hydroxyl group-containing substance other than organopolysiloxanes (A), and recovering a liquid aminoalkyl-functional organopolysiloxane, wherein at least a portion of condensing takes place at a pressure in the range of 600 torr or less.
Dependencies are inferred from the claim text.