Laminate with fluoropolymer film and film-forming fluoropolymer
View Patent ↗A functionalized fluoropolymer, preferably with phosphate functionality, can be coated on a metal oxide containing rubber substrate, which coating, after heating, results in a fluoropolymer-rubber substrate laminate without degradation of the rubber, and with good adhesion between the fluoropolymer and the rubber.
1. A laminate, comprising a polymer substrate containing a metal oxide, and a functional group-containing fluoropolymer coating layer, wherein the melting point of the functional group-containing fluoropolymer is 220 to 280° C.
2. The laminate of claim 1 , wherein the functional group-containing fluoropolymer is a phosphate group-containing fluoropolymer.
3. The laminate of claim 2 , wherein the functional group-containing fluoropolymer is a tetrafluoroethylene/trifluorovinyl ether group-containing dihydrogen phosphate ester compound/fluorine-containing comonomer copolymer resin.
4. The laminate of claim 3 , wherein the fluorine-containing comonomer is perfluoro(alkyl vinyl ether) or perfluoroalkyl vinyl.
5. The laminate of claim 3 , wherein the trifluorovinyl group-containing dihydrogen phosphate ester compound (1) is the dihydrogen phosphate ester
CF 2 ═CF(OR) m (CH 2 )OP(O)(OH) 2 (1)
where R is a C 1 -C 20 fluorinated alkylene group, m is an integer from 1 to 10, and R may be the same or different when m is 2 or greater.
6. The laminate of claim 4 , wherein said comonomer contains about 3 to 15 mol % of the perfluoro(alkyl vinyl ether) component or perfluoroalkyl vinyl component.
7. The laminate of claim 1 , wherein the functional group-containing fluoropolymer is a composition comprising a functional group-containing fluoropolymer and a fluoropolymer without functional groups.
8. The laminate of claim 7 , wherein the functional group-containing fluoropolymer is about 30 to 80 wt. % of the total composition.
9. The laminate of claim 7 , wherein the fluoropolymer without functional groups is a copolymer of tetrafluoroethylene with at least one monomer selected from the group consisting of perfluoro(alkyl vinyl ether) and perfluoroalkyl vinyl.
10. The laminate of claim 9 , characterized in that the fluoropolymer without functional groups contains 3 to 15 mol % of said at least one monomer.
11. The laminate of claim 1 , wherein the substrate comprises an elastomer.
12. The laminate of claim 11 , wherein the elastomer is silicone rubber.
13. The laminate of claim 1 , wherein the metal oxide is iron oxide.
14. The laminate of claim 13 , wherein the iron oxide is red iron oxide.
15. The laminate of claim 1 , wherein the substrate is a roller.
16. The laminate of claim 1 , provided with fluoropolymer on the external surface thereof.
17. A laminate, comprising a polymer substrate containing a metal oxide, and a functional group-containing fluoropolymer coating layer, wherein the melting point of the functional group-containing fluoropolymer is 220 to 280 C. and said functional group-containing fluoropolymer is a core/shell polymer composition, said core being fluoropolymer without functional groups, and said shell being functional group-containing fluoropolymer.