Toner fuser member having release layer formed from glycidyl end-capped polymer and perfluoroalkyl glycidyl-reactive compound
View Patent ↗A toner fuser member has a substrate, on which is formed a toner release surface layer from a composition that includes: about 95 wt. % to about 99.9 wt. % of a cross-linked, glycidyl end-capped bisphenolic polymer having the formula where R 1 and R 2 are each independently H or an alkyl group containing 1 to about 4 carbon atoms, and R 3 and R 4 are each independently H, F, or an alkyl group containing 1 to about 4 carbon atoms, Z is a carbonyl cross-linking group, and x is an integer from 1 to about 10; and about 0.01 wt. % to about 5 wt. % of a perfluoroalkylsubstituted glycidyl-reactive compound having the formula where R 5 is H or F, Q is OH or SiR 6 R 7 R 8 , R 6 , R 7 , and R 8 being independently selected from the group consisting of Cl, OH, an alkyl group containing 1 to about 4 carbon atoms, an alkoxy group containing 1 to about 4 carbon atoms, an acyloxy group containing 2 to about 4 carbon atoms, and an amino group containing 0 to about 4 carbon atoms; and n is an integer from 1 to about 15. When Q is SiR 6 R 7 R 8 , at least one of R 6 , R 7 , and R 8 is Cl, OH, or an alkoxy, acyloxy, or amino group.
1. A toner fuser member comprising:
a substrate;
a toner release surface layer disposed on said substrate, said surface layer being formed from a composition that comprises:
about 95 wt. % to about 99.9 wt. % of a cross-linked, glycidyl end-capped bisphenolic polymer having the formula
where R 1 and R 2 are each independently H or an alkyl group containing 1 to about 4 carbon atoms, and R 3 and R 4 are each independently H, F, or an alkyl group containing 1 to about 4 carbon atoms, Z is a carbonyl cross-linking group, and x is an integer from 1 to about 10; and
about 0.01 wt. % to about 5 wt. % of a perfluoroalkylsubstituted glycidyl-reactive compound having the formula
where R 5 is H or F, Q is OH or SiR 6 R 7 R 8 , R 6 , R 7 , and R 8 being independently selected from the group consisting of Cl, OH, an alkyl group containing 1 to about 4 carbon atoms, an alkoxy group containing 1 to about 4 carbon atoms, an acyloxy group containing 2 to about 4 carbon atoms, and an amino group containing 0 to about 4 carbon atoms; and n is an integer from 1 to about 15; with the proviso that, when Q is SiR 6 R 7 R 8 , at least one of R 6 , R 7 , and R 8 is Cl, OH, or an alkoxy, acyloxy, or amino group.
2. The toner fuser member of claim 1 wherein said composition comprises about 0.1 wt. % to about 3 wt. % of said perfluoroalkylsubstituted glycidyl-reactive compound.
3. The toner fuser member of claim 1 wherein said glycidyl end-capped bisphenolic polymer is cross-linked by a cross-linking agent that comprises a diimide or a dianhydride.
4. The toner fuser member of claim 3 wherein said cross-linking agent comprises pyromellitic anhydride.
5. The toner fuser member of claim 3 wherein said composition comprises said glycidyl end-capped bisphenolic polymer and said cross-linking agent in a weight ratio of about 2:1 to about 5:1.
6. The toner fuser member of claim 5 wherein said toner composition comprises said glycidyl end-capped bisphenolic polymer and said cross-linking agent in a weight ratio of about 3.3:1.
7. The toner fuser member of claim 1 wherein said composition further comprises a filler selected from the group consisting of SiO 2 , TiO 2 , ZnO, SnO 2 , Al 2 O 3 , and mixtures thereof.
8. The toner fuser member of claim 7 wherein said composition comprises said filler in an amount of about 1 wt. % to about 30 wt. %.
9. The toner fuser member of claim 8 wherein said composition is SiO 2 in an amount of about 1 wt. % to about 7 wt. %.
10. The toner fuser member of claim 1 wherein R 1 , R 3 , and R 4 are each H.
11. The toner fuser member of claim 1 wherein Q is OH and n is 7 or 8.
12. The toner fuser member of claim 1 wherein said member is a fuser belt.
13. The toner fuser member of claim 12 wherein said fuser belt comprises a substrate formed of metal.
14. The toner fuser member of claim 13 wherein said metal is selected from the group consisting of steel, stainless steel, aluminum, copper, and nickel.
15. The toner fuser member of claim 12 wherein said fuser belt comprises a substrate formed of a thermoset organic polymeric material.
16. The toner fuser member of claim 15 wherein said thermoset organic polymeric material is selected from the group consisting of a polyimide, a polyamide, a polyamide-imide, a polycarbonate, and a polyester.
17. The fuser member of claim 16 wherein said thermoset organic polymeric material comprises a polyimide.
18. The toner fuser member of claim 1 wherein said surface layer has a thickness of about 1 μm to about 20 μm.
19. The toner fuser member of claim 18 wherein said thickness is about 5 μm to about 10 μm.