Stainproofing oil for a heat fixing roller

• US 5,568,239 A
• Filed: 03/27/1995
• Issued: 10/22/1996
• Est. Priority Date: 08/27/1993
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Yoshino, Mami, Furukawa, Yutaka, Kumai, Seisaku
• Primary Examiner(s): Sweet, Mark D.
• Application Number:
  US08/412,221
• Time in Patent Office: 575 Days
• Field of Search: 355/282, 355/285, 355/290, 355/295, 355/284, 118/DIG. 1
• US Class Current: 399/324
• CPC Class Codes: C08G 77/24 halogen-containing groups
• CPC Class Codes: G03G 15/2025 with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid
• CPC Class Codes: G03G 2215/2093 Release agent handling devices
• CPC Class Codes: Y10S 118/01 Anti-offset

Abstract

A stainproofing oil for a heat fixing roller, which consists essentially of a fluorosilicone compound having a silicon atom to which a monovalent fluorine-containing group selected from the formulae (1) to (3) is bonded:

R.sub.f.sup.1 --X.sup.1 --                                 (1)

R.sub.f.sup.2 --X.sup.2 --O--X.sup.3 --                    (2)

R.sub.f.sup.3 --X.sup.4 --O--X.sup.5 --                    (3)

wherein R_f¹ is a monovalent polyfluorohydrocarbon group, R_f² is a monovalent polyfluoroalkyl group containing an ether oxygen atom, R_f³ is a monovalent polyfluorohydrocarbon group, and each of X¹ to X⁵ independently is a bivalent hydrocarbon group.

Claims

1. A heat fixing roller coated with a stainproofing oil which consists essentially of a fluorosilicone compound having a silicon atom to which a monovalent fluorine-containing group selected from the formulae (1) to (3) is bonded:

space="preserve" listing-type="equation">R.sub.f.sup.1 --X.sup.1 -- (1)

space="preserve" listing-type="equation">R.sub.f.sup.2 --X.sup.2 --O--X.sup.3 (

     2)

space="preserve" listing-type="equation">R.sub.f.sup.3 --X.sup.4 --O--X.sup.5 (

     3)

wherein R_f¹ is a monovalent polyfluorohydrocarbon group of the formula CF₃ (CF₂)_n --wherein n is an integer of from 3 to 13, R_f² is a monovalent polyfluoroalkyl group containing an ether oxygen atom R_f³ is a monovalent polyfluorohydrocarbon group and each of X¹ to X⁵ independently is a bivalent hydrocarbon group.

2. A method for stainproofing a heat fixing roller, which comprises applying to the surface of the heat fixing roller, a fluorosilicone compound having a silicon atom to which a monovalent fluorine-containing group selected from the formulae (1) to (3) is bonded:

space="preserve" listing-type="equation">R.sub.f.sup.1 --X.sup.1 -- (1)

space="preserve" listing-type="equation">R.sub.f.sup.2 --X.sup.2 --O--X.sup.3 -- (2)

space="preserve" listing-type="equation">R.sub.f.sup.3 --X.sup.4 --O--X.sup.5 -- (3)

wherein R_f¹ is a monovalent polyfluorohydrocarbon group of the formula CF₃ (CF₂)_n --wherein n is an integer of from 3 to 13, R_f² is a monovalent polyfluoroalkyl group containing an either oxygen atom, R_f³ is a monovalent polyfluorohydrocarbon group, and each of X¹ to X⁵ independently is a bivalent hydrocarbon group.

3. The method for stainproofing a heat fixing roller according to claim 2, wherein the formula (1) is represented by the formula (4):

space="preserve" listing-type="equation">CF.sub.3 (CF.sub.2).sub.n --X.sup.6 -- (4)

wherein n is an integer of from 3 to 13, and X⁶ is a C_1-10 alkylene group.

4. The method for stainproofing a heat fixing roller according to claim 2, wherein the formula (2) is represented by the formula (5):

space="preserve" listing-type="equation">F[CF(CF.sub.3)CF.sub.2 O].sub.m CF(CF.sub.3)--X.sup.7 --O--X.sup.8 --(5)

wherein m is an integer of from 1 to 10, and each of X⁷ and X⁸ independently is a C_1-10 alkylene group.

5. The method for stainproofing a heat fixing roller according to claim 2, wherein the formula (3) is represented by the formula (6):

space="preserve" listing-type="equation">CF.sub.3 (CF.sub.2).sub.k --X.sup.9 --O--X.sup.10 -- (6)

wherein k is an integer of from 0 to 17, and each of X⁹ and X¹⁰ independently is a C_1-10 alkylene group.

6. The method for stainproofing a heat fixing roller according to claim 2, wherein the fluorosilicone compound is of the formula (7):

##STR7## wherein R¹⁰ is a lower alkyl group, each of R¹¹ to R¹³ independently is a lower alkyl group or a monovalent aromatic hydrocarbon group, a is an integer of at least 1, b is an integer of 0 or at least 1, and R_f¹⁴ is a monovalent fluorine-containing group selected from the formulae (1) to (3).

7. The method for stainproofing a heat fixing roller according to claim 2, which is used for a heat fixing roller having a silicone rubber surface or a fluorine resin surface.

8. The method for stainproofing a heat fixing roller according to claim 2, wherein the heat fixing roller is a heat fixing roller for a copy machine or a printing machine.