US 12,448,539 B2
Sealant composition
Jiang Peng, Shanghai (CN); Yi Guo, Shanghai (CN); Nanguo Liu, Midland, MI (US); Nick Shephard, Auburn, MI (US); Ye Wu, Shanghai (CN); and Matt Olsen, Wilmington, DE (US)
Assigned to DOW SILICONES CORPORATION, Midland, MI (US); and ROHM AND HAAS COMPANY, Collegeville, PA (US)
Appl. No. 17/786,408
Filed by DOW SILICONES CORPORATION, Midland, MI (US); and ROHM AND HAAS COMPANY, Collegeville, PA (US)
PCT Filed Dec. 17, 2019, PCT No. PCT/CN2019/125814
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2021/119970, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2023/0024520 A1, Jan. 26, 2023
Int. Cl. C09D 183/04 (2006.01); C08K 3/36 (2006.01); C08K 5/5419 (2006.01); C08K 5/544 (2006.01); C08K 9/06 (2006.01); C09J 11/08 (2006.01); C09J 183/04 (2006.01); C08G 77/18 (2006.01)
CPC C09D 183/04 (2013.01) [C08K 3/36 (2013.01); C08K 5/5419 (2013.01); C08K 5/544 (2013.01); C08K 9/06 (2013.01); C09J 11/08 (2013.01); C09J 183/04 (2013.01); C08G 77/18 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2312/00 (2013.01)] 18 Claims
 
1. A one-part room temperature vulcanisable (RTV) silicone composition comprising:
(a) an organopolysiloxane polymer having at least two hydroxyl or hydrolysable groups per molecule and of the general formula

OG Complex Work Unit Chemistry
in which each X is independently a hydroxyl group or a hydrolysable group, each R is an alkyl, alkenyl or aryl group, each R1 is an X group, alkyl group, alkenyl group or aryl group and Z is a divalent organic group; d is 0 or 1, q is 0 or 1 and (d+q)=1; n is 0, 1, 2 or 3, y is 0, 1 or 2, or optionally y is 2, and z is an integer such that organopolysiloxane polymer (a) has a viscosity of from 10,000 to 75,000 mPa's at 25° C., or optionally from 10,000 to 60,000 mPa·s at 25° C.;
(b) a reinforcing filler comprising or consisting of fumed or pyrogenic silica filler which is optionally hydrophobically treated, in an amount of from about 5 to about 25 parts by weight per 100 parts by weight of organopolysiloxane polymer (a);
(c) a silane adhesion promoter, in an amount of from about 0.10 to about 2.0 parts by weight per 100 parts by weight of organopolysiloxane polymer (a); and
(d) a catalyst comprising (i) a titanate and/or zirconate and (ii) a metal carboxylate salt in an amount of from about 0.33 to 5.3 parts by weight per 100 parts by weight of organopolysiloxane polymer (a); and optionally, further comprising:
(e) a cross-linker; and/or
(f) a hydroxy scavenging agent selected from a disilazane or polysilazane.