US 11,719,364 B2
Barrier layer for hoses
Wolfram Herrmann, Wunstorf (DE); Dieter Borvitz, Hannover (DE); Steffen Wietzke, Uetze (DE); Frank Jungrichter, Korbach (DE); and Hartmut Bangert, Diemselsee (DE)
Assigned to ContiTech Schlauch GmbH, Hannover (DE)
Appl. No. 16/956,324
Filed by ContiTech Schlauch GmbH, Hannover (DE)
PCT Filed Oct. 15, 2018, PCT No. PCT/EP2018/078013
§ 371(c)(1), (2) Date Jun. 19, 2020,
PCT Pub. No. WO2019/120677, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 10 2017 223 546.2 (DE), filed on Dec. 21, 2017.
Prior Publication US 2021/0080035 A1, Mar. 18, 2021
Int. Cl. F16L 11/04 (2006.01); C08K 3/04 (2006.01); B32B 1/08 (2006.01); B32B 25/04 (2006.01); B32B 27/32 (2006.01); C08L 9/02 (2006.01); C08L 15/02 (2006.01); C08L 27/18 (2006.01); B29D 23/00 (2006.01); B29C 48/151 (2019.01); B29C 48/09 (2019.01); B29C 71/02 (2006.01); B29C 48/02 (2019.01)
CPC F16L 11/04 (2013.01) [B29C 48/02 (2019.02); B29C 48/09 (2019.02); B29C 48/151 (2019.02); B29C 71/02 (2013.01); B29D 23/001 (2013.01); B32B 1/08 (2013.01); B32B 25/042 (2013.01); B32B 27/322 (2013.01); C08K 3/041 (2017.05); C08K 3/042 (2017.05); C08K 3/044 (2017.05); C08L 9/02 (2013.01); C08L 15/02 (2013.01); C08L 27/18 (2013.01); C08K 2201/001 (2013.01); C08L 2203/18 (2013.01); C08L 2203/30 (2013.01); C08L 2312/00 (2013.01); F16L 2011/047 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A process for producing a hose comprising at least one barrier layer inner layer and an outer layer, wherein the process comprises:
I) extruding a mixture comprising:
a) FTPV pellets comprising at least one thermoplastic fluoropolymer, at least one fluororubber and a crosslinking agent; and,
b) at least one carbon filler selected from carbon black, conductivity carbon black, graphene, carbon nanofiller, or a combination thereof, and/or irradiated PTFE;
to form the barrier layer;
II) applying the outer layer over the barrier layer; and,
III) vulcanizing of the formed hose construction;
wherein the crosslinking agent is selected from the group consisting of diamines, bisphenols, peroxides, polyols and quaternary ammonium salts;
wherein the mixture is extruded at a temperature in the range from 240° C. to 300° C.;
wherein crosslinking of the mixture is carried out during formation of the barrier layer;
wherein the at least one carbon filler promotes the crosslinking; and,
wherein the barrier layer is not meltable at 280° C. after the extruding and before the vulcanizing.