公开(公告)号：US20230024747A1

公开(公告)日：2023-01-26

申请号：US17786418

申请日：2019-12-17

Applicant: DOW SILICONES CORPORATION

Inventor： Xiuyan WANG ,  Jiang PENG ,  Yi GUO ,  Qiang HU ,  Zhiping ZENG ,  Nanguo LIU ,  Nick SHEPHARD

IPC: C09J183/04 ,  C08K9/06 ,  C08K5/54 ,  C08K5/09 ,  C08K3/26

Abstract: A one-part low modulus room temperature vulcanisable (RTV) silicone composition containing a catalyst comprising (i) a titanate and/or zirconate and (ii) a metal carboxylate salt which cures to a low modulus silicone elastomer which may be used as a non-staining (clean) sealant having high movement capability.

公开(公告)号：US20240294711A1

公开(公告)日：2024-09-05

申请号：US18573352

申请日：2021-06-28

Applicant: DOW SILICONES CORPORATION

Inventor： Jiang PENG ,  Yi GUO ,  Xiuyan WANG ,  Zhiping ZENG ,  Ye WU

IPC: C08G77/16 ,  C08G77/08 ,  C08K3/36 ,  C09J183/06

CPC classification number: C08G77/16 ,  C08G77/08 ,  C08K3/36 ,  C09J183/06

Abstract: This disclosure relates to a process for the preparation of a one component translucent room temperature vulcanisable (RTV) silicone composition. The RTV composition comprises chain-extended alkoxy end-capped polydiorganosiloxane polymers, and tin-based catalysts. The process generates a one component translucent RTV silicone composition which is stable in storage, in the absence of moisture, and is curable in the presence of atmospheric moisture at ambient temperature. The one component translucent RTV silicone composition resulting from the process was unexpectedly found to have excellent adhesive properties towards polyvinyl chloride (PVC) substrates.

公开(公告)号：US20230323034A1

公开(公告)日：2023-10-12

申请号：US18023714

申请日：2020-08-31

Applicant: DOW SILICONES CORPORATION

Inventor： Xiuyan WANG ,  Jiang PENG ,  Yi GUO ,  Qiang HU ,  Michael H. WANG

IPC: C08G77/08 ,  C08G77/16 ,  C08G77/382 ,  C08K5/5419 ,  C08K5/5425 ,  C08K5/09

CPC classification number: C08G77/08 ,  C08G77/16 ,  C08G77/382 ,  C08G2190/00 ,  C08K5/5425 ,  C08K5/09 ,  C08K5/5419

Abstract: A process for end-capping a dimethylsilanol terminated polydiorganosiloxane with one or more di, tri and/or tetra alkoxysilanes in the presence of a basic end-capping catalyst starting material is provided. An acidic stabilizing/neutralising agent is subsequently added. The acidic stabilizing/neutralising agent is selected from one or more fatty acids having from 8 to 26 carbons; an alkane sulphonic acid having from 1 to 10 carbons; acidic fumed silica and/or one or more acidic liquid polybutadienes or a mixture thereof. The resulting capped polymeric material may be utilized as a polymer in, e.g., an organopolysiloxane elastomer composition.

公开(公告)号：US20230013216A1

公开(公告)日：2023-01-19

申请号：US17786389

申请日：2019-12-17

Applicant: DOW SILICONES CORPORATION

Inventor： Xiuyan WANG ,  Yi GUO ,  Jiang PENG ,  Zhiping ZENG ,  Qiang HU

IPC: C08G77/388 ,  C09J183/06 ,  C08G77/18 ,  C08G77/06 ,  C08K3/26

Abstract: A process for end capping and chain extending silanol terminated polydiorganosiloxanes with a mixture of one or more alkylacetoxydialkoxysilanes and one or more alkyldiacetoxyalkoxysilanes. The resulting capped polymeric material may be utilised as a polymer in e.g. a one-part alkoxy sealant composition such as, for example, an alkoxy low modulus clean (non-staining) or clear sealant composition.