Claims
- 1. A coated roll comprising:
- a substrate, and coated thereon an underlying layer of a silicone elastomer, and coated on said silicone elastomer a barrier layer formed by curing a polymeric composition comprising:
- a fluorocarbon polymer;
- a fluorocarbon-curing agent; and
- a curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer, and creating an interpenetrating network consisting essentially of separately crosslinked polymers, said fluorocarbon polymer, and said fluorocarbon-curing agent form one said crosslinked polymer and said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer forms a second said crosslinked polymer.
- 2. A coated roll according to claim 1, wherein said polymeric composition further comprises an accelerator for curing said fluorocarbon polymer with said fluorocarbon-curing agent.
- 3. A coated roll according to claim 1, wherein said polymeric composition further comprises a filler.
- 4. A coated roll according to claim 1, wherein said fluorocarbon polymer is a copolymer of vinylidene fluoride and hexafluoropropylene.
- 5. A coated roll according to claim 1, wherein said fluorocarbon polymer is a terpolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene.
- 6. A coated roll according to claim 1, wherein said fluorocarbon-curing agent is 2,2-bis(4-hydroxyphenyl)hexafluoropropane.
- 7. A coated roll according to claim 1, wherein said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer is a heat-curable polymer.
- 8. A coated roll according to claim 7, wherein said heat-curable polymer is a hydroxy-functionalized polymer.
- 9. A coated roll according to claim 7, wherein said heat-curable polymer is a hard silicone copolymer comprising repeating units of the formulae,
- (R.sup.3).sub.2 SiO and R.sup.4 Sio.sub.1.5
- wherein R.sup.3 and R.sup.4 are independently C.sub.1-6 alkyl or phenyl, provided that the ratio of phenyl to C.sub.1-6 alkyl groups is at least about 1 to 1.
- 10. A coated roll according to claim 9 wherein said hard silicone copolymer has a number-average molecular weight of less than 10,000 and a difunctional to trifunctional ratio of 0.1 to 1.
- 11. A fusing roll comprising:
- a cylindrical core;
- an underlying layer of a cured silicone elastomer;
- a barrier layer, coated on said underlying layer, of a composition formed by curing a polymeric composition comprising a fluorocarbon polymer, a fluorocarbon-curing agent and a curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer, and creating an interpenetrating network consisting essentially of separately crosslinked polymers, said fluorocarbon polymer and said fluorocarbon-curing agent form one said crosslinked polymer, and said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer forms a second said crosslinked polymer; and
- an outermost layer of a cured silicone elastomer.
- 12. A fusing member comprising:
- a substrate, and coated thereon an underlying layer of a silicone elastomer, and coated on said silicone elastomer a barrier layer formed by curing a polymeric composition comprising:
- a fluoroelastomer;
- a fluorocarbon-curing agent; and
- a curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer, and creating an interpenetrating network consisting essentially of separately crosslinked polymers, said fluoroelastomer and said fluorocarbon-curing agent form one said crosslinked polymer, and said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer forms a second crosslinked polymer.
- 13. A fusing member according to claim 12, wherein the ratio of said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer to said fluoroelastomer is between 0.1 and 10 to 1 by weight.
- 14. A fusing member according to claim 13, wherein the ratio of said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer to said fluoroelastomer is between 0.2 and 2 to 1 by weight.
- 15. A fusing member according to claim 12, wherein said barrier layer further comprises fluorocarbon-curing accelerator, acid acceptor type filler, and inert filler, wherein said barrier layer comprises 30-70 weight percent said fluoroelastomer, 30-60 weight percent said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer, 1-10 weight percent said fluorocarbon-curing agent, 1-3 weight percent said fluorocarbon-curing accelerator, 5-20 weight percent said acid acceptor type filler, and 0-30 weight percent said inert filler.
- 16. A fusing member according to claim 12, wherein said fluoroelastomer is a vinylidene fluoride-based fluoroelastomer.
- 17. A fusing member according to claim 12, wherein said fluorocarbon-curing agent is 2,2-bis(4-hydroxyphenyl)hexafluoropropane.
- 18. A fusing member according to claim 12, wherein said curable polyfunctional poly(C.sub.1-6 alkyl)phenylsiloxane polymer is a heat-curable polymer.
- 19. A fusing member according to claim 18, wherein said heat-curable polymer is a hydroxy-functionalized polymer.
- 20. A fusing member according to claim 19, wherein said heat-curable polymer is additionally a hard silicone copolymer comprising repeating units of the formulae,
- (R.sup.3).sub.2 SiO and R.sup.4 SiO.sub.1.5
- wherein R.sup.3 and R.sup.4 are independently C.sub.1-6 alkyl or phenyl, provided that the ratio of phenyl to C.sub.1-6 alkyl groups is at least about 1 to 1 and having a difunctional to trifunctional ratio of 0.1 to 1.
Parent Case Info
This is a continuation of application Ser. No. 07/940,929, filed Sep. 4, 1992, now abandoned.
US Referenced Citations (20)
Foreign Referenced Citations (2)
Number |
Date |
Country |
291081A |
Nov 1988 |
EPX |
2294678 |
Dec 1990 |
JPX |
Non-Patent Literature Citations (3)
Entry |
Research Disclosure 27567, Anonymous, Fuser Blade Oiler, Mar. 1987, p. 172. |
Research Disclosure 21733, Anonymous, Fuser Member, May 1982, pp. 175-178. |
P. Pawar, Flame-Retardant Poyolefins Don't Need Halogen, Plastics Technology, Mar. 1990, pp. 75-79. |
Continuations (1)
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Number |
Date |
Country |
Parent |
940929 |
Sep 1992 |
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