公开(公告)号：WO2019027668A1

公开(公告)日：2019-02-07

申请号：PCT/US2018/042405

申请日：2018-07-17

Applicant: DOW SILICONES CORPORATION

Inventor： GUBBELS, Frederic ,  COOREMANS, Thierry ,  RENAUD, Julien ,  DE BUYL, Francois ,  BEUKEMA, Martin ,  BAILY, Victor ,  CHAMBARD, Gregory

IPC: C08L83/04 ,  H01L23/29 ,  H01L33/56

Abstract: A room temperature curable encapsulation/potting material composition comprising: (i) at least one condensation curable silyl terminated polymer having at least one, Si- hydroxyl functional groups per molecule; (ii) a cross-linker selected from the group of - silanes having at least 2 hydrolysable groups, alternatively at least 3 hydrolysable groups per molecule group; and/or - silyl functional molecules having at least 2 silyl groups, each silyl group containing at least one hydrolysable group. (iii) a condensation catalyst selected from the group of titanates and zirconates characterized in that: - the molar ratio of the sum of moisture present in the formulation, and total silicon bonded hydroxyl groups: the catalyst is > 7:1; and (a) when the molar ratio of the sum of moisture present in the formulation, and total silicon bonded hydroxyl groups: the catalyst 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 and (b) when the molar ratio of the sum of moisture present in the formulation, and total silicon bonded hydroxyl groups: the catalyst is from >10:1 the molar ratio of total silicon bonded hydroxyl groups : total hydrolysable groups is between 0.1:1 to 0.5:1.