	US 11,834,582 B2
	Fluoropolymer coatings for substrates comprising an elastomeric material
Alain G. Verschuere, Melsele (BE); Joachim Kneer, Balve (DE); and Anne Van Royen, Melsele (BE)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/973,996
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jun. 11, 2019, PCT No. PCT/IB2019/054876 § 371(c)(1), (2) Date Dec. 10, 2020, PCT Pub. No. WO2019/239326, PCT Pub. Date Dec. 19, 2019.
Claims priority of provisional application 62/683,714, filed on Jun. 12, 2018.
Prior Publication US 2021/0115286 A1, Apr. 22, 2021
Int. Cl. C09D 127/18 (2006.01); C09J 127/18 (2006.01)

CPC C09D 127/18 (2013.01) [C09J 127/18 (2013.01)]

9 Claims

1. A method of treating a substrate comprising an elastomeric material, wherein the method comprises the steps of:

a) providing a composition comprising:

i. at least one fluoropolymer which is a copolymer comprising at least 90% by weight, based on the total weight of the copolymer, of units derived from tetrafluoroethene (TFE) and from one or more perfluorinated alkyl ethers corresponding to the general formula (I):

R_f1—O—(CF₂)_n—CF═CF₂ (I)

wherein n is 1 or 0 and R_f1represents a perfluoroalkyl residue which is optionally interrupted once or more than once by an oxygen atom; and

ii. at least one solvent comprising a linear, cyclic or branched, partially fluorinated (poly)ether;

b) contacting at least part of the elastomeric material with the composition of step a);

c) at least partially removing the at least one solvent.