Aminofunctional organosiloxanes

US10245451B2 · kind B2 · utility

Assignee

• Dow Silicones Corporation · US

Inventors

• Sylvie Bouzeloc · Montigny-le-Tilleul, BE
• Severine Cauvin · Seneffe, BE
• Cindy Delvalle · Uccle - Ukkel, BE
• Tatiana Dimitrova · Braine-l'Alleud, BE
• Sophie Hanssens · Seneffe, BE
• Lok Ming Eva Li · Midland, US
• Elodie Raynaud · Épinois, BE
• Houria Seghir · Nivelles, BE
• Avril Surgenor · Cardiff, GB
• Blondine Donatienne Van Roy · Wezembeek-Oppem, BE

Key dates

• Filing date: Nov 27, 2017
• Grant date: Apr 2, 2019
• Expiry date: Nov 27, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/08
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Aminofunctional silicone compositions are disclosed comprising: an organopolysiloxane having an average formula of (CH3)3SiO[(CH3)2SiO]x [(CH3)RNSiO]ySi(CH3)3 with less than 1 weight % of nitrogen in its formula, where RN is an aminofunctional group, x is ≥100, y is ≥1 with the proviso the sum of x+y is from 250 to 350; wherein the viscosity of the silicone composition ranges from 1000 to 2500 cP at 25° C. and is measured by a Brookfield RV DV viscometer equipped with Pro CP 52 spindle at 20 RPM; and the aminofunctional silicone composition contains less than 0.1 weight % of D4 and less than 0.1 weight % D5 cyclic siloxanes.