Adhesive, bearing with the adhesive, and methods of making

Patent metadata

Field	Value
Publication number	US-10947427-B2
Application number	US-201916370498-A
Country	US
Kind code	B2
Filing date	Mar 29, 2019
Priority date	Mar 29, 2018
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

Embodiments of the present disclosure are directed to an adhesive layer, bearing including the adhesive layer, and methods of forming. The adhesive layer can include a mixture of a first polymer, a second polymer, and a third polymer, wherein the second polymer includes ethylene tetrafluoroethylene, and the third polymer includes a modified ethylene tetrafluoroethylene, ethylene tetrafluoroethylene hexafluoropropylene, or a combination thereof. In a particular embodiment, the first polymer can include an aromatic polymer. In another embodiment, the adhesive layer can have a tensile stress in an extrusion direction of at least 30 MPa.

First claim

What is claimed is:

1. A bearing, comprising:
a substrate layer; and
an adhesive layer disposed over the substrate,
wherein the adhesive layer comprises:
a first polymer, wherein the first polymer is present in the adhesive layer in a content from 3 wt. % to 25 wt. % for a total weight of the adhesive layer;
a second polymer comprising ethylene tetrafluoroethylene (ETFE); and
a third polymer comprising a modified ethylene tetrafluoroethylene (mETFE), an ethylene tetrafluoroethylene hexafluoropropylene (EFEP), or a combination thereof; and

wherein the adhesive layer has at least one characteristic selected from the group consisting of:
a melting temperature that is at least 20° C. higher than a melting temperature of the third polymer;
a tensile stress in an extrusion direction of at least 30 MPa;
a tensile stress in a transversal direction of at least 20 MPa; and
a melting temperature that is at most 330° C.

2. The bearing of claim 1 , wherein the modified ethylene tetrafluoroethylene (mETFE) is present in the adhesive layer in a content of at least 1 wt. % and at most 10 wt. % for the total weight of the adhesive layer.

3. The bearing of claim 1 , wherein modified ethylene tetrafluoroethylene (mETFE) is present in the adhesive layer in a content from 3 wt. % to 7 wt. % for the total weight of the adhesive layer.

4. The bearing of claim 1 , wherein the ethylene tetrafluoroethylene hexafluoropropylene (EFEP) is present in the adhesive layer in a content of at least 1 wt. % and at most 10 wt. % for the total weight of the adhesive layer.

5. The bearing of claim 1 , wherein the adhesive layer comprises a weight ratio of a content of the ethylene tetrafluoroethylene (ETFE) to a content of the first polymer from 4:1 to 12:1.

6. A bearing comprising:
a substrate layer; and
an adhesive layer disposed over the substrate,
wherein the adhesive layer comprises:
a first polymer, wherein the first polymer comprises an aromatic polymer;
a second polymer comprising ethylene tetrafluoroethylene (ETFE); and
a third polymer comprising a modified ethylene tetrafluoroethylene (mETFE), an ethylene tetrafluoroethylene hexafluoropropylene (EFEP), or a combination thereof; and

wherein the adhesive layer has at least one characteristic selected from the group consisting of:
a melting temperature that is at least 20° C. higher than a melting temperature of the third polymer;
a tensile stress in an extrusion direction of at least 30 MPa;
a tensile stress in a transversal direction of at least 20 MPa; and
a melting temperature that is at most 33° C.

7. The bearing of claim 1 , wherein the ethylene tetrafluoroethylene (ETFE) is present in the adhesive layer in a content from 60 wt. % to 98 wt. %.

8. The bearing of claim 1 , wherein the modified ethylene tetrafluoroethylene (mETFE) comprises a functional group comprising a hydroxyl group (—OH), a carbonyl fluoride (—COF), a carboxyl group (—COOH), a maleic anhydride group (—(CH CO) 2 O), an acrylate group (—CH 2 ═CHCOOH), a glycidyl methacrylate group (—CH 2 C(CH 3 ) COOCH 2 (CHCH 2 O)), or a combination thereof.

9. The bearing of claim 6 , wherein the first polymer is present in the adhesive layer in a content from 3 wt. % to 25 wt. % for the total weight of the adhesive layer.

10. The bearing of claim 1 , wherein the first polymer comprises a sulfone group, an ether group, or a combination thereof.

11. The bearing of claim 1 , wherein the first polymer comprises a polysulfone.

12. The bearing of claim 1 , wherein the first polymer comprises polyethersulfone (PESU), polyphenylene sulfide, polyphenylsulfone, or a combination thereof.

13. The bearing of claim 1 , wherein the first polymer comprises polyethersulfone.

14. The bearing of claim 1 , wherein the first polymer consists essentially of polyethersulfone (PESU).

15. The bearing of claim 1 , wherein the second polymer consists essentially of ethylene tetrafluoroethylene (ETFE).

16. The bearing of claim 1 , wherein the third polymer consists essentially of ethylene tetrafluoroethylene (mETFE), ethylene tetrafluoroethylene hexafluoropropylene (EFEP), or a combination thereof.

17. The bearing of claim 1 , wherein the adhesive layer consists essentially of polyethersulfone, ethylene tetrafluoroethylene (ETFE), and ethylene tetrafluoroethylene hexafluoropropylene (EFEP).

18. The bearing of claim 1 , further comprising a sliding layer, wherein the adhesive layer is disposed between the substrate layer and the sliding layer.

19. The bearing of claim 18 , wherein the substrate layer comprises aluminum, steel, stainless steel, cold-rolled steel, zinc plated steel, or any combination thereof.

20. A bearing, comprising:
a substrate layer;
a sliding layer; and
an adhesive layer disposed between the substrate and the sliding layer,
wherein the adhesive layer comprises:
a first polymer comprising polyethersulfone (PESU), polyphenylene sulfide, polyphenylsulfone, or a combination thereof;
wherein the first polymer is present in the adhesive layer in a content from 3 wt. % to 25 wt. % for a total weight of the adhesive layer;
a second polymer comprising ethylene tetrafluoroethylene (ETFE); and
a third polymer comprising a modified ethylene tetrafluoroethylene (mETFE), an ethylene tetrafluoroethylene hexafluoropropylene (EFEP), or a combination thereof; and

wherein the adhesive layer has at least one characteristic selected from the group consisting of:
a melting temperature that is at least 20° C. higher than a melting temperature of the third polymer;
a tensile stress in an extrusion direction of at least 30 MPa;
a tensile stress in a transversal direction of at least 20 MPa; and
a melting temperature that is at most 330° C.

Assignees

• Saint Gobain Performance Plastics Corp

Inventors

• Dong Jing
• Mekhilef Nafih
• Shin Dongyeop

Classifications

• C09J127/24

  halogenated · CPC title

• F16C2202/06

  Strength or rigidity · CPC title

• F16C2208/30

  Fluoropolymers (F16C2208/58 takes precedence) · CPC title

• F16C33/208

  Methods of manufacture, e.g. shaping, applying coatings · CPC title

• C09J127/18 Primary

  Homopolymers or copolymers of tetrafluoroethene · CPC title