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.

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：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.