Dow Silicones Corporation

Thierry Cooremans

Martijn A Beukema

Frederic Gubbels

Francois De Buyl

Victor Baily

Gregory Chambard

Kevin Van Tiggelen

Julien Renaud

François De Buyl

Martin Beukema

A method for producing an optical silicone assembly is disclosed. The method comprises the steps of: i) treating a surface of a substrate with an optically clear silicone adhesive composition; ii) placing the substrate obtained by step i) into a mold; iii-a) injecting an optically clear moldable silicone composition into the mold, and/or iii-b) overmolding the optically clear moldable silicone composition onto the substrate; and then iv) heating the optically clear moldable silicone composition to form the optical silicone assembly. The optical silicone assembly produced by the method of this disclosure is characterized by excellent adhesion of an optical silicone product to various types of substrates.

Method for producing optical silicone assembly, and optical silicone assembly produced thereby

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 &#x3e;7:1. When the molar ratio is from &#x3e;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 &#x3e;10:1, the molar ratio of total silicon bonded hydroxyl groups:total hydrolysable groups is between 0.1:1 to 0.5:1.

Elastomeric compositions and their applications

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Thierry Cooremans