公开(公告)号：US20220204770A1

公开(公告)日：2022-06-30

申请号：US17605598

申请日：2020-04-28

Applicant: DOW SILICONES CORPORATION

Inventor： Roman VANECEK ,  Patrick BEYER

IPC: C08L83/06 ,  C09D183/06 ,  B32B25/20 ,  B32B25/04 ,  B32B7/12

Abstract: Provided is a primer composition and the preparation and use thereof. The primer composition comprises a silicone polyether, a reinforcing filler, one or more polydiorganosiloxane polymer(s), and a carrier. The primer composition is particularly designed for use with silicone elastomers, especially for addition (hydrosilylation) curing silicone elastomers. Also provided is a process for improving the adhesion of silicone elastomeric compositions to pre-cured silicone elastomer material substrates via the primer composition.

公开(公告)号：US20240262970A1

公开(公告)日：2024-08-08

申请号：US18636223

申请日：2024-04-15

Applicant: DOW SILICONES CORPORATION

Inventor： Roman VANECEK ,  Patrick BEYER

IPC: C08J7/043 ,  C07F7/08 ,  C08F130/08 ,  C08K3/36 ,  C09D5/00 ,  C09D143/04 ,  C09J5/00

CPC classification number: C08J7/043 ,  C07F7/087 ,  C08F130/08 ,  C08K3/36 ,  C09D5/002 ,  C09D143/04 ,  C09J5/00 ,  C08J2383/04 ,  C08K2201/019 ,  C09J2483/003

Abstract: There is described a primer composition comprising a silicone polyether, a reinforcing filler, one or more polydiorganosiloxane polymer(s) and a carrier and the preparation and use thereof. The primer composition is particularly designed for use with silicone elastomers especially for addition (hydrosilylation) curing silicone elastomers, the preparation thereof, and to a process for improving the adhesion of silicone elastomeric compositions to pre-cured silicone elastomer material substrates. A method for improving the adhesion of silicone elastomer to a pre-cured silicone elastomeric substrate is provided. The method comprises: applying a primer composition to a silicone elastomer substrate; optionally, air-drying (or baking) the primer composition to form a uniform primer film covering the substrate; applying a hydrosilylation curable silicone rubber composition to the substrate covered with the primer to obtain a composite; and curing the composite in order to obtain a silicone elastomer adhesively bonded to a silicone elastomer substrate.