Back to results
US 11,753,601 B2Granted
Ultra-low friction materials for lubricating surfaces, devices therewith, and methods of manufacture and use thereof
AssigneeDura-Line Corporation
InventorsH. Thomas Chung, Fei Fan, Sung Ki Cho, Sam Lukubira, Caleb Michael Spradling, Arturo Valencia
Life of this patent
Estimating the term…
Abstract
A polymeric material mixture comprising a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two polymer processing additives have different chemistries. For example, there can be a flexible coextruded pipe for providing a protective housing for cables, fluids, sludge or solids, the pipe comprising a pair of telescopically related inner and outer layers, where said inner layer is lubricated with the polymeric material mixture.
Claims18
A polymeric material mixture, comprising:
- a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPAs), wherein the at least two PPAs have different chemistries, wherein the fluorine-containing polymer includes polytetrafluoroethylene (PTFE), wherein the siloxane polymer includes an ultra-high molecular weight (UHMW) siloxane polymer having a viscosity of about 1 million mm2/s to about 100 million mm2/s, wherein the at least two PPAs collectively include a fluoropolymer-based material having a molecular weight of about 1,000,000 to about 5,000,000 and a polyethylene-based material having a molecular weight of 2,000,000 to 3,000,000, wherein the PTFE is in an amount of about 10.0% (w/w) to about 20.0% (w/w), the UHMW siloxane polymer is in an amount of about 20.0% (w/w) to about 40.0% (w/w), the fluoropolymer-based material is in an amount of about 10.0% (w/w) to about 15.0% (w/w), and the polyethylene-based material is in an amount of about 10.0% (w/w) to about 25.0% (w/w), based on a total weight of the polymeric material mixture, wherein a particle size distribution of the PTFE has a D50 of about 40 μm to about 50 μm and a D90 of about 150 μm to about 200 μm, and wherein the D50 is a median value of particle size diameters in the particle size distribution and the D90 is a particle size value at which about 90% of the particle size distribution has a smaller size particle diameter.
A polymeric material mixture, comprising:
- a graphene, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two PPAs have different chemistries, wherein the siloxane polymer includes an ultra-high molecular weight (UHMW) siloxane polymer having a viscosity of about 1 million mm2/s to about 100 million mm2/s, wherein the at least two PPAs collectively include a fluoropolymer-based material having a molecular weight of about 1,000,000 to about 5,000,000 and a polyethylene-based material having a molecular weight of 2,000,000 to 3,000,000, and wherein the graphene is in an amount of about 10.0% (w/w) to about 40.0% (w/w), the UHMW siloxane polymer is in an amount of about 20.0% (w/w) to about 60.0% (w/w), the fluoropolymer-based material is in an amount of about 10.0% (w/w) to about 15.0% (w/w), and the polyethylene-based material is in an amount of about 10.0% (w/w) to about 25.0% (w/w), based on a total weight of the polymeric material mixture.
A device, comprising:
- a surface coated with a mixture including a fluorine-containing polymer, a siloxane polymer, and a plurality of polymer processing additives (PPAs), wherein the PPAs have different chemistries, wherein the fluorine-containing polymer includes polytetrafluoroethylene (PTFE), wherein the siloxane polymer includes an ultra-high molecular weight (UHMW) siloxane polymer having a viscosity of about 1 million mm2/s to about 100 million mm2/s, wherein the at least two PPAs collectively include a fluoropolymer-based material having a molecular weight of about 1,000,000 to about 5,000,000 and a polyethylene-based material having a molecular weight of 2,000,000 to 3,000,000, wherein the PTFE is in an amount of about 10.0% (w/w) to about 20.0% (w/w), the UHMW siloxane polymer is in an amount of about 20.0% (w/w) to about 40.0% (w/w), the fluoropolymer-based material is in an amount of about 10.0% (w/w) to about 15.0% (w/w), and the polyethylene-based material is in an amount of about 10.0% (w/w) to about 25.0% (w/w), based on a total weight of the mixture, wherein a particle size distribution of the PTFE has a D50 of about 40 μm to about 50 μm and a D90 of about 150 μm to about 200 μm, and wherein the D50 is a median value of particle size diameters in the particle size distribution and the D90 is a particle size value at which about 90% of the particle size distribution has a smaller size particle diameter.
A mixture comprising:
- a fluorine-containing polymer, a siloxane polymer, and a plurality of polymer processing additives (PPAs), wherein the PPAs have different the fluorine-containing polymer includes chemistries, wherein polytetrafluoroethylene (PTFE), wherein the siloxane polymer includes an ultra-high molecular weight (UHMW) siloxane polymer having a viscosity of about 1 million mm2/s to about 100 million mm2/s, wherein the PPAs collectively include a fluoropolymer-based material having a molecular weight of about 1,000,000 to about 5,000,000 and a polyethylene-based material having a molecular weight of 2,000,000 to 3,000,000, wherein the PTFE is in an amount of about 10.0% (w/w) to about 20.0% (w/w);
- the UHMW siloxane polymer is in an amount of about 20.0% (w/w) to about 40.0% (w/w), the fluoropolymer-based material is in an amount of about 10.0% (w/w) to about 15.0% (w/w), and the polyethylene-based material is in an amount of about 10.0% (w/w) to about 25.0% (w/w), based on a total weight of the mixture, wherein a particle size distribution of the PTFE has a D50 of about 40 μm to about 50 μm and a D90 of about 150 μm to about 200 μm, wherein the D50 is a median value of particle size diameters in the particle size distribution and the D90 is a particle size value at which about 90% of the particle size distribution has a smaller size particle diameter.
Dependencies are inferred from the claim text.