Organosiloxane compositions

US9567503B2 · kind B2 · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Victor Baily · Braine-l'Alleud, BE
• Frederic Gubbels · Houtain-le-Val, BE
• Stephanie Lobry · Onnaing, FR

Key dates

• Filing date: Jul 18, 2013
• Grant date: Feb 14, 2017
• Expiry date: Jul 18, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/025
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A curable phenylorganosiloxane polymer composition comprising: (a) 100 parts by weight of a phenylorganosiloxane having a viscosity of at least 10000 mPa·s at 25° C. and at least two reactive groups per molecule selected from (i) —OH or hydrolysable groups and (ii) unsaturated groups; (c) 0 to 500 parts by weight of fillers per 100 parts by weight of (a); (d) a suitable cure package comprising a cross-linker and a catalyst the suitable cure package being selected from a silane or polyorganosiloxane and a condensation catalyst when (a) is (a) (i) or a hydrosilylation catalyst when (a) is (a) (ii); and (b) 0.1 to 300 parts by weight of at least one phenyl siloxane resin per 100 parts by weight of (a). The compositions are especially useful in sealants (particularly in sealants for insulating glass units (IGUs), due to their low gas permeability), in conformal coatings and for corrosion protection.