Hybrid silicone composition for light emitting device

US9085651B2 · kind B2 · utility

Assignees

• ABLESTIK (SHANGHAI) LTD. · CN
• Henkel AG & Co. KGaA · DE

Inventors

• Jing Xu Zhou · Eindhoven, NL
• Stijn Gillissen · Hasselt, BE
• Karen Leyssens · Berchem, BE
• Thomas Plantenberg · Neustadt an der Weinstraße, DE
• Ralf Dunekake · Goldkronach, DE
• Leticia Borque · Goldkronach, DE

Key dates

• Filing date: Mar 15, 2013
• Grant date: Jul 21, 2015
• Expiry date: Mar 15, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/0002
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A silicon-based curable composition providing improved transparency, mechanical strength and resistance against heat and photo-degradation comprises at least one organopolysiloxane represented by the composition formula (1):(R13SiO1/2)a(R12SiO2/2)b(R1R2SiO2/2)c(R1SiO3/2)d(R2SiO3/2)e(R12R2SiO1/2)f  (1),wherein each R2 independently represents a methacryloxyalkyl group having 5 to 20 carbon atoms and a≧0, b≧0, c≧0, d≧0, e≧0, f≧0, c+e>0, and a+b+c+d+e+f=1; and at least one curing catalyst. The product is ideal for encapsulation of LED (light emitting device) elements.