	US 12,134,669 B2
	Fluoroelastomers with perfluorinated thermoplastic fillers
Tatsuo Fukushi, Woodbury, MN (US); Julie A. Baker, St. Paul, MN (US); Yuta Suzuki, Kanagawa (JP); Steffen Vowinkel, Mühldorf am Inn (DE); Justin P. McBride, Woodbury, MN (US); and Michael H Mitchell, Edina, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 18/568,981
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jun. 30, 2022, PCT No. PCT/IB2022/056131 § 371(c)(1), (2) Date Dec. 11, 2023, PCT Pub. No. WO2023/285909, PCT Pub. Date Jan. 19, 2023.
Claims priority of provisional application 63/220,907, filed on Jul. 12, 2021.
Prior Publication US 2024/0182615 A1, Jun. 6, 2024
Int. Cl. C08F 214/26 (2006.01); C08L 27/18 (2006.01)

CPC C08F 214/262 (2013.01) [C08L 27/18 (2013.01); C08L 2205/025 (2013.01)]

20 Claims

1. An elastomer composition comprising a curable fluoroelastomer and at least 25% by weight of perfluorinated thermoplastic fillers based on the total weight of the fluoroelastomer and the perfluorinated thermoplastic fillers; wherein the perfluorinated thermoplastic fillers comprise a first perfluorinated thermoplastic filler having a first d50 particle size of 10 to 250 nanometers as measured according to the Latex Size Procedure, and a second perfluorinated thermoplastic filler having a second d50 particle size of 5 to 500 micrometers as measured according to the Powder Size Procedure.