Elastomeric compositions and their applications

US10717870B1 · kind B1 · utility

Assignee

• Dow Silicones Corporation · US

Inventors

• Frederic Gubbels · Houtain-le-Val, BE
• Thierry Cooremans · Seneffe, BE
• Julien Renaud · Seneffe, BE
• Francois De Buyl · Brussels, BE
• Martijn Beukema · Copenhagen, DK
• Victor Baily · Braine-l'Alleud, BE
• Gregory Chambard · Seneffe, BE

Key dates

• Filing date: Jul 17, 2018
• Grant date: Jul 21, 2020
• Expiry date: Jul 17, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/854
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A room temperature curable composition is disclosed. The composition can be used as an encapsulation/potting material. The composition comprises: (i) at least one condensation curable silyl terminated polymer having at least one silicon bonded hydroxyl functional group per molecule; (ii) a cross-linker having at least two hydrolysable groups and selected from certain silanes and/or silyl functional molecules; and (iii) a condensation catalyst selected from the group of titanates and/or zirconates. The molar ratio of the sum of moisture present in the composition and total silicon bonded hydroxyl groups:the catalyst (“the molar ratio”) is >7:1. When the molar ratio is from >7:1 to 10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.3:1. When the molar ratio is >10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.5:1.