Slide bearing comprising a primer system as adhesion promoter

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 R 1 and R 2 can be the same or different. The moieties R 1 and R 2 can be selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, and a functionalized alkyl group R′—(CH 2 ) 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.

1 . A slide bearing comprising,
 a metal support;   a primer layer, wherein the primer layer comprises 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, 
           wherein R 1  and R 2  are the same or different and are selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, and a functionalized alkyl group R′—(CH 2 ) z —, wherein z is at least 1; 
         
         an adhesive layer applied directly to the primer layer, 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; and 
         a sliding layer. 
       
     
     
         2 . The slide bearing according to  claim 1 , wherein R′ is selected from the group consisting of vinyl, difluorovinyl, trifluoromethyl, pentafluoroethyl, methoxy, ethoxy, trifluoromethoxy, pentafluoroethoxy, dimethyl amino, diethlyamino, di(trifluoromethyl)amino, and di(pentafluoroethyl)amino. 
     
     
         3 . The slide bearing according to  claim 1 , wherein the at least one silanol is selected from the group consisting of: 
       
         
           
           
               
               
           
         
       
     
     
         4 . The slide bearing according to  claim 1 , wherein two silanols are selected in a weight ratio of at least about 1:1, such as at least about 2:1, at least about 3:1, at least about 4:1, at least about 5:1, at leas about 10:1, at least about 20:1, or at least about 50:1. 
     
     
         5 . (canceled) 
     
     
         6 . The slide bearing according to  claim 1 , wherein the primer layer has a thickness of at least about 0.2 microns, such as at least about 0.5 micron, at least about 0.8 microns, at least about 1 micron, at least about 1.5 microns, at least about 2 microns, at least about 2.5 microns, or at least about 3 microns. 
     
     
         7 . The slide bearing according to  claim 6 , wherein the thickness is not greater than about 5 microns, such as not greater than about 4.5 microns, not greater than about 4 microns, not greater than about 3.5 microns, not greater than about 3 microns, not greater than about 2.5 microns, or not greater than about 2 microns. 
     
     
         8 . The slide bearing according to  claim 1 , wherein the primer layer and the adhesive layer have a combined thickness of at least about 2 microns, such as at least about 4 micron, at least about 6 microns, at least about 8 microns, or at least about 10 microns. 
     
     
         9 . (canceled) 
     
     
         10 . The slide bearing according to  claim 1 , wherein the primer layer and the adhesive layer have a combined bonding strength after T-peel force according to DIN EN 1895 of at least about 100 N/cm, such as at least about 120 N/cm, at least about 140 N/cm, at least about 160 N/cm, or at least about 180 N/cm. 
     
     
         11 . The slide bearing to  claim 1 , wherein the primer layer, the adhesive layer and the sliding layer have a combined bonding strength after T-peel force according to DIN EN 1895 of at least about 70 N/cm, such as at least about 100 N/cm, at least about 120 N/cm, or at least about 140 N/cm. 
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . The slide bearing according to  claim 1 , wherein the adhesive layer further comprises at least one filler. 
     
     
         15 . The slide bearing according to  claim 14 , wherein the at least one filler is selected from fibers, glass fibers, carbon fibers, aramids, inorganic materials, ceramic materials, carbon, glass, graphite, aluminum oxide, molybdenum sulfide, tungsten disulfide, bronze, silicon carbide, woven fabrics, powders, spheres, thermoplastic materials, polyimide (PI), polyamidimide (PAI), polyphenylene sulfide (PPS), polyphenylene sulfone (PPSO2), liquid crystal polymers (LCP), polyether ether ketones (PEEK) aromatic polyesters (Ekonol), mineral materials, wollastonite, barium sulfate, or any combination thereof. 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . (canceled) 
     
     
         20 . (canceled) 
     
     
         21 . (canceled) 
     
     
         22 . The slide bearing according to  claim 1 , wherein the sliding layer comprises polytetrafluoroethylene, polyamide, polyimide, polyether ether ketone, or a mixture thereof. 
     
     
         23 . (canceled) 
     
     
         24 . (canceled) 
     
     
         25 . (canceled) 
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . (canceled) 
     
     
         29 . (canceled) 
     
     
         30 . A method of producing a slide bearing, comprising:
 applying a primer liquid onto a metal support, the primer liquid comprising at least one silanol or 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, 
           wherein R 1  and R 2  are the same or different and are selected from the group consisting of methyl, ethyl, n-propyl, i-propyl, and a functionalized alkyl group R′—(CH 2 ) z —, wherein z is at least 1; 
         
         drying the primer liquid to form a primer layer, 
         applying an adhesive precursor onto the primer layer to form an adhesive layer, and 
         applying a sliding layer onto the adhesive layer. 
       
     
     
         31 . The method according to  claim 30 , wherein the applying of the primer liquid includes spraying, brushing, and dip coating. 
     
     
         32 . (canceled) 
     
     
         33 . (canceled) 
     
     
         34 . (canceled) 
     
     
         35 . The method according to  claim 30 , wherein applying the sliding layer includes laminating, coiling paste spreading a sliding precursor and curing, or any combination thereof. 
     
     
         36 . (canceled) 
     
     
         37 . (canceled) 
     
     
         38 . The method according to  claim 30 , wherein the at least one silanol is selected from the group consisting of: 
       
         
           
           
               
               
           
         
       
     
     
         39 . The method according to  claim 30 , wherein two silanols are selected in a weight ratio of at least about 1:1, such as at least about 2:1, at least about 3:1, at least about 4:1, at least about 5:1, at leas about 10:1, at least about 20:1, or at least about 50:1. 
     
     
         40 . (canceled) 
     
     
         41 . (canceled) 
     
     
         42 . (canceled) 
     
     
         43 . (canceled) 
     
     
         44 . (canceled) 
     
     
         45 . (canceled) 
     
     
         46 . (canceled) 
     
     
         47 . The method according to  claim 30 , further comprising adding a filler to the adhesive precursor prior to applying the adhesive precursor. 
     
     
         48 . (canceled) 
     
     
         49 . (canceled) 
     
     
         50 . (canceled) 
     
     
         51 . (canceled) 
     
     
         52 . The method according to  claim 30  further comprising applying a coating onto the metal prior to applying the primer liquid. 
     
     
         53 . The method according to  claim 52 , 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. 
     
     
         54 . (canceled) 
     
     
         55 . (canceled) 
     
     
         56 . (canceled) 
     
     
         57 . (canceled) 
     
     
         58 . (canceled) 
     
     
         59 . (canceled) 
     
     
         60 . (canceled)