Slide bearing comprising a primer system as adhesion promoter

• US 10,563,696 B2
• Filed: 09/27/2018
• Issued: 02/18/2020
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Performance Plastics Pampus GmbH (Compagnie de Saint-Gobain SA)
• Original Assignee: Saint-Gobain Performance Plastics Pampus GmbH (Compagnie de Saint-Gobain SA)
• Inventors: Schmitjes, Olaf
• Primary Examiner(s): Oladapo, Taiwo
• Application Number:
  US16/144,164
• Publication Number:
  US 20190024714A1
• Time in Patent Office: 509 Days
• CPC Class Codes: B05D 7/14 to metal, e.g. car bodies involving a chemical reaction between the metal and the coating C23
• CPC Class Codes: B05D 7/584 at least some layers being let to dry, at least partially, before applying the next layer B05D7/587 takes precedence
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: C09D 5/002 Priming paints C09D5/08 takes precedence
• CPC Class Codes: C09J 123/0892 containing monomers with other atoms than carbon, hydrogen or oxygen atoms
• CPC Class Codes: C09J 127/18 Homopolymers or copolymers of tetrafluoroethene
• CPC Class Codes: C09J 2400/163 in the substrate
• CPC Class Codes: C09J 2427/00 Presence of halogenated polymer
• CPC Class Codes: C09J 7/28 Metal sheet metallised plastics C09J7/22
• CPC Class Codes: F16C 2204/60 Ferrous alloys, e.g. steel alloys
• CPC Class Codes: F16C 2206/00 Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
• CPC Class Codes: F16C 2208/00 Plastics; Synthetic resins, e.g. rubbers
• CPC Class Codes: F16C 2208/02 comprising fillers, fibres
• CPC Class Codes: F16C 2208/30 Fluoropolymers F16C2208/58 takes precedence
• CPC Class Codes: F16C 2208/32 Polytetrafluorethylene [PTFE] F16C2208/58 takes precedence
• CPC Class Codes: F16C 2208/58 Several materials as provided for in F16C2208/30 - F16C2208/54 mentioned as option
• CPC Class Codes: F16C 2223/30 Coating surfaces
• CPC Class Codes: F16C 2226/40 with adhesive
• CPC Class Codes: F16C 2240/40 Linear dimensions, e.g. length, radius, thickness, gap
• CPC Class Codes: F16C 2240/60 Thickness, e.g. thickness of coatings
• CPC Class Codes: F16C 2240/94 : Volume
• CPC Class Codes: F16C 2300/02 : General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
• CPC Class Codes: F16C 33/04 : Brasses; Bushes; Linings
• CPC Class Codes: F16C 33/201 : Composition of the plastic
• CPC Class Codes: F16C 33/206 : with three layers
• CPC Class Codes: F16C 33/208 : Methods of manufacture, e.g. shaping, applying coatings
• CPC Class Codes: Y10T 156/10 : Methods of surface bonding and/or assembly therefor

Abstract

A slide bearing can include a metal support, a primer layer, an adhesive layer applied directly thereto, and a sliding layer applied to the adhesive layer. The primer layer can include an oligomeric condensate of at least one silanol selected from the group having the formula:

• • wherein x is 1 or 2, y is 0 or 1.

The moieties R¹ and R² can be the same or different. The moieties R¹ and R² can be selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, and a functionalized alkyl group R′—(CH₂)_z—, wherein z is at least 1. Slide bearings comprising a primer system based on silanol oligomeric condensates show improved peel strength than their analogous slide bearings lacking the primer system.

Claims

1. A method of producing a slide bearing, comprising:

applying a primer liquid onto a metal support, the primer liquid consisting essentially of at least one silanol, an oligomeric condensate of at least one silanol, or combination thereof, wherein the at least one silanol is selected from the group having the formula

2. The method according to claim 1, wherein the applying of the primer liquid includes spraying, brushing, and dip coating.

3. The method according to claim 1, wherein the primer liquid comprises an organic solvent, water, or a combination thereof.

4. The method according to claim 3, wherein the organic solvent is selected from methanol, ethanol, propanol, iso-propanol, butanol, diethyl ether, tetrathydrofuran, acetone, ethyl acetate, or any combination thereof.

5. The method according to claim 1, wherein the adhesive layer is in the form of a film, a foil, a powder, or any combination thereof.

6. The method according to claim 1, wherein applying the sliding layer includes laminating, coiling paste spreading a sliding precursor and curing, or any combination thereof.

7. The method according to claim 1, wherein the adhesive layer is selected from the group consisting of perfluoroalkoxyethylene (PFA), tetrafluoroethylene-perfluoro(methyl vinyl ether) copolymer (MFA), ethylene tetrafluoroethylene (ETFE), tetrafluoroethylene-hexafluoropropylene (FEP), and any combination thereof.

8. The method according to claim 1, wherein R′

is selected from the group consisting of vinyl, difluorovinyl, trifluoromethyl, pentafluoroethyl, methoxy, ethoxy, trifluoromethoxy, pentafluoroethoxy, dimethyl amino, diethylamino, di(trifluoromethyl)amino, and di(pentafluoroethyl)amino.

9. The method according to claim 1, wherein the at least one silanol is selected from the group consisting of:

10. The method according to claim 1, wherein z is not greater than 10.

11. The method according to claim 1, wherein the primer layer has a thickness of at least about 0.2 microns and not greater than about 5 microns.

12. The method according to claim 1, wherein the primer layer and the adhesive layer have a combined thickness of at least about 2 microns and not greater than about 50 microns.

13. The method according to claim 1, wherein a thickness of the primer layer and the adhesive layer corresponds essentially to a roughness of the metal support defined as the distance between the maximum profile peak height and the maximum profile valley depth of the roughness profile (Rmax) of the surface of the metal support of at least about 1 micron not greater than about 40 microns.

14. The method according to claim 1, wherein the adhesive layer comprises a filler.

15. The method according to claim 1, further comprising applying a coating onto the metal prior to applying the primer liquid.

16. The method according to claim 15, wherein the coating is an electrolytically plated metal selected from the group consisting of chromium, molybdenum, tungsten, manganese, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, and cadmium.

17. The method according to claim 1, wherein the metal support comprises steel, cold-rolled steel, material No. 1.0338 or 1.0347, matt zinc-plated steel, stainless steel, material No. 1.4512 or 1.4720, aluminum, bronze, alloys, or any combinations thereof.

18. The method according to claim 1, wherein the sliding layer comprises polytetrafluoroethylene, polyamide, polyimide, polyether ether ketone, or a mixture thereof.

19. The method according to claim 1, further comprising rendering the sliding layer perforated, air-permeable, or both.

20. The method according to claim 1, wherein the sliding layer comprises at least one filler.