Back to results
US 11,298,634 B2Granted
Polysiloxane defoaming agent
AssigneeBYK-Chemie GmbH
InventorsVerena Wintermeyer, Guillaume Wojciech Jaunky, Mirco Süselbeck, Mathis Kulessa, Daniela Leutfeld
Life of this patent
Estimating the term…
Abstract
The invention relates to the use of a polysiloxane having a plurality of siloxane groups and at least one tertiary amide group covalently linked as a pending and/or terminal group to the polysiloxane, as a defoaming agent in a liquid composition.
Claims15
A process comprising:
- adding a polysiloxane to a non-aqueous liquid composition, the polysiloxane including a plurality of siloxane groups and 2 to 7 covalently linked tertiary amide groups as pending and/or terminal groups, wherein the polysiloxane does not contain fluorinated organic groups and has a number average molecular weight in the range of 800 to 8000 g/mol, wherein the polysiloxane is added to the non-aqueous liquid composition in an amount effective to reduce or eliminate foaming within a coating formed by spray application of the non-aqueous liquid composition.
A process of preparing a coated substrate, the process comprising:
- providing a non-aqueous liquid coating composition comprising a polysiloxane including a plurality of siloxane groups and 2 to 7 covalently linked tertiary amide groups as pending and/or terminal groups, wherein the polysiloxane does not contain fluorinated organic groups and has a number average molecular weight in the range of 800 to 8000 g/mol, wherein the polysiloxane is included in an amount effective to reduce or eliminate foaming within a coating formed by spray application of the non-aqueous liquid coating composition, and
- applying the non-aqueous liquid coating composition to a substrate to provide a dry layer thickness of at least 50 μm.
Dependencies are inferred from the claim text.