US 12,454,632 B2
Curable silicone composition, release coating agent comprising said composition, release film obtained using said release coating agent, and layered product including said release film
Michitaka Suto, Chiba (JP); Satoshi Onodera, Chiba (JP); Tadashi Okawa, Chiba (JP); Hidefumi Tanaka, Chiba (JP); and Haruhiko Furukawa, Chiba (JP)
Assigned to DOW TORAY CO., LTD., Tokyo (JP)
Appl. No. 17/418,387
Filed by Dow Toray Co., Ltd., Tokyo (JP)
PCT Filed Dec. 27, 2019, PCT No. PCT/JP2019/051399
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/138413, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-245681 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0056322 A1, Feb. 24, 2022
Int. Cl. C09J 7/40 (2018.01); B32B 7/06 (2019.01); B32B 7/12 (2006.01); C09J 7/38 (2018.01)
CPC C09J 7/401 (2018.01) [B32B 7/06 (2013.01); B32B 7/12 (2013.01); C09J 7/38 (2018.01); B32B 2405/00 (2013.01); C09J 2483/00 (2013.01); C09J 2483/005 (2013.01)] 8 Claims
 
1. A curable silicone composition, comprising:
(A) a mixture of two or more fluoroalkyl group-containing organopolysiloxanes having a fluoroalkyl group and at least two alkenyl groups per molecule, wherein the contents of the fluoroalkyl groups differ from each other, and wherein the two or more fluoroalkyl group-containing organopolysiloxanes are a combination of those which are not completely compatibilized at 25° C. when mixed in the absence of a solvent;
(B) an organopolysiloxane having at least three silicon-bonded hydrogen atoms per molecule;
(C) an effective amount of a hydrosilylation reaction catalyst; and
(D) an organic solvent capable of compatibilizing the entire composition by uniformly compatibilizing the mixture of two or more fluoroalkyl group-containing organopolysiloxanes serving as component (A);
wherein component (A) is a mixture of:
(A1) one or more linear or branched organopolysiloxanes comprising fluoroalkyl group-containing organodisiloxane units and having a fluorine atom content of 40 mass % or more; and
(A2) one or more linear or branched organopolysiloxanes comprising fluoroalkyl group-containing organodisiloxane units and having a fluorine atom content of less than 40 mass %; and
wherein the difference between the fluorine atom content (mass %) of component (A1) and the fluorine atom content (mass %) of component (A2) is 3 mass % or more.