US 11,753,507 B2
Addition curable composition comprising siloxane-imide copolymers
Subrata Mandal, Bangalore (IN); Tetsuo Fujimoto, Gunma (JP); Vinodh Rajendra, Ballston Spa, NY (US); Joseph Zampella, Niskayuna, NY (US); Ramasubramanian Narayanan, Bangalore (IN); and Clarissa Miller, Waterford, NY (US)
Assigned to Momentive Performance Materials Inc., Waterford, NY (US)
Filed by Momentive Performance Materials Inc., Waterford, NY (US)
Filed on Dec. 23, 2020, as Appl. No. 17/132,234.
Prior Publication US 2022/0195124 A1, Jun. 23, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 83/04 (2006.01); C08G 77/455 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); C08G 77/00 (2006.01); C08K 3/22 (2006.01); C08K 5/3417 (2006.01); C08L 83/08 (2006.01)
CPC C08G 77/455 (2013.01) [C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08G 77/70 (2013.01); C08G 77/80 (2013.01); C08K 3/22 (2013.01); C08K 5/3417 (2013.01); C08L 83/08 (2013.01); C08K 2003/2272 (2013.01); C08L 2201/08 (2013.01); C08L 2203/20 (2013.01); C08L 2205/03 (2013.01); C08L 2312/08 (2013.01)] 35 Claims
 
1. An addition curable silicone-imide composition comprising:
(A) an alkenyl functional siloxane-imide copolymer selected from a compound of the formula (I):

OG Complex Work Unit Chemistry
R1 is independently selected from a C5-C20 aryl, a polycyclic aryl group comprising two or more C5-C20 aryl groups, where R1 can be unsubstituted or substituted with a C1-C6 alkyl, a halogen, a haloalkyl, a hydroxy, and/or a C1-C5 alkoxy groups;
R2 is independently selected from a C1-C20 divalent hydrocarbon, a C4-C20 branched divalent hydrocarbon, or a C4-C30 cyclic containing hydrocarbon group;
R3, R4, R5, and R6 are each independently selected from a C1-C10 alkyl and a C6-C20 aryl;
m is an integer from 1 to about 200; and
n is an integer from 1 to about 30; the alkenyl functional siloxane-imide copolymer being present in the composition in an amount of from about 20 to about 50 parts by mass based on the total weight of the curable silicone composition;
(B) from about 20 parts to about 50 parts by mass of an alkenyl functional organosiloxane based on the total weight of the curable silicone composition;
(C) a polyorganohydrogensiloxane having at least two hydrogen atoms bonded to silicon atoms;
(D) a catalyst selected from precious metal catalysts selected from ruthenium, rhodium, palladium, osmium, iridium, and platinum, and complexes comprising one or more of such metals;
(E) an additive; and
(F) 0 parts by mass to about 3000 parts of a filler based on the total weight of the curable silicone composition.