CA2469362A1 - Improved windshield wiper having reduced friction characteristics - Google Patents

Improved windshield wiper having reduced friction characteristics Download PDF

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Publication number
CA2469362A1
CA2469362A1 CA002469362A CA2469362A CA2469362A1 CA 2469362 A1 CA2469362 A1 CA 2469362A1 CA 002469362 A CA002469362 A CA 002469362A CA 2469362 A CA2469362 A CA 2469362A CA 2469362 A1 CA2469362 A1 CA 2469362A1
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CA
Canada
Prior art keywords
weight percent
wiper blade
filler
silicone
polytetrafluoroethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002469362A
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French (fr)
Other versions
CA2469362C (en
Inventor
Scott D. Sharabura
Michael E. Allen
Jeannie Holmes
Victor K. Paulsen
Subramaniam Shanmugham
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Jamak Fabrication-Tex LLC
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Individual
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Filing date
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Application filed by Individual filed Critical Individual
Publication of CA2469362A1 publication Critical patent/CA2469362A1/en
Application granted granted Critical
Publication of CA2469362C publication Critical patent/CA2469362C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3836—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/382—Boron-containing compounds and nitrogen
    • C08K2003/385—Binary compounds of nitrogen with boron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y10T428/2995—Silane, siloxane or silicone coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Abstract

A wiper blade made of a compound having a methyl vinyl silicone polymer, a filler, and a friction-reducing additive is provided. The friction-reducing additive is present in an amount from between about 5 - 42 weight percent, preferably 11 percent. The average particle size of the friction-reducing additive is preferably less than 6 microns, thereby permitting extrusion of the compound in the shape of a wiper blade. Polytetrafluoroethylene is preferred as a friction-reducing additive, but other substances, such as boron nitride or graphite could be used. In the figure, a windshield wiper (11) according to the present invention includes a wiper frame (13), a spline member (15), and a wiper blade (17). The wiper blade includes each side (35) of a squeegee member (23) and a relatively thick retainer flange (27). The squeegee member (23) includes a relatively thin squeegee blade end (33).
Spline member (15) is engaged by a claw (41). The wiper blade (17) removed moisture and debris from the windshield (45).

Claims (3)

1. A silicone wiper blade compound comprising:
a methyl vinyl silicone polymer from about 22 to 55 weight percent;
a filler from about 35 to 50 weight percent; and polytetrafluoroethylene from about 11 to 42 weight percent.
2. A silicone wiper blade compound according to claim 1, wherein the polytetrafluoroethylene has an average particle size of less than 25 µm.
3. A silicone wiper blade compound according to claim 1, wherein the polytetrafluoroethylene has an average particle size of less than 6 µm.
7. A silicone wiper blade compound according to claim 1, wherein the filler is a mineral.
8. A silicone wiper blade compound according to claim 1, wherein the filler is selected from the group consisting of silica and calcium.
9. A silicone wiper blade compound according to claim 1 further comprising:
hydroxyl-terminated silicone polymer from 1 to 15 weight percent;
a cerium stabilizer from 0.1 to 1 weight percent;
acid acceptor from 0.1 to 1 weight percent;
pigment from 0.1 to 1 weight percent; and peroxide from 0.5 to 2 weight percent.

10. A silicone wiper blade compound comprising:
a methyl vinyl, silicone polymer from about 22 to 55 weight percent;
a filler from about 35 to 50 weight percent; and polytetrafluoroethylene from about 5 to 42 weight percent; and wherein the polytetrafluoroethylene has an average particle size of less than 25 µm.
11. A silicone wiper blade compound according to claim 10, wherein the polytetrafluoroethylene has an average particle size of less than 6 µm.
15. A silicone wiper blade compound according to claim 10, wherein the filler is a mineral.
16. A silicone wiper blade compound according to claim 10, wherein the filler is selected from the group consisting of silica and calcium.
17. A silicone wiper blade compound according to claim 10 further comprising:
hydroxyl-terminated silicone polymer from 1 to 15 weight percent;
a cerium stabilizer from 0.1 to 1 weight percent;
acid acceptor from 0.1 to 1 weight percent;
pigment from 0.1 to 1 weight percent; and peroxide from 0.5 to 2 weight percent.

18. A windshield wiper comprising:
a frame adapted to be attached to a vehicle;
a wiper blade attached to the frame; and wherein the wiper blade is made from a compound having a methyl vinyl silicone polymer from about 22 to 55 weight percent, a filler from about 35 to 50 weight percent, and polytetrafluoroethylene from about 11 to 42 weight percent.
19. A windshield wiper according to claim 18, wherein the polytetrafluoroethylene has an average particle size of less than 25 µm.
20. A windshield wiper according to claim 18, wherein the polytetrafluoroethylene has an average particle size of less than 6 µm.
24. A windshield wiper according to claim 18, wherein the filler is a mineral.
25. A windshield wiper according to claim 18, wherein the filler is selected from the group consisting of silica and calcium.
26. A windshield wiper according to claim 18, wherein the compound further comprises:
hydroxyl-terminated silicone polymer from 1 to 15 weight percent;
a cerium stabilizer from 0.1 to 1 weight percent;
acid acceptor from 0.1 to 1 weight percent;
pigment from 0.1 to 1 weight percent; and peroxide from 0.5 to 2 weight percent.

27. A method for manufacturing a wiper blade comprising the steps of:
compounding a mixture having from about 22 to 55 weight percent of a methyl vinyl silicone polymer, from about 35 to 50 weight percent of a filler, and from about 11 to 42 weight percent of polytetrafluoroethylene; and extruding the mixture to form the wiper blade.

28. A method for manufacturing a wiper blade according to claim 27, wherein the polytetrafluoroethylene has an average particle size of less than 25 µm.

29. A method for manufacturing a wiper blade according to claim 27, wherein the polytetrafluoroethylene has an average particle size of less than 6µm.

33. A method for manufacturing a wiper blade according to claim 27, wherein the filler is a mineral.

34. A method for manufacturing a wiper blade according to claim 27, wherein the filler is selected from the group consisting of silica and calcium.

35. A method for manufacturing a wiper blade according to claim 27, wherein the mixture further comprises:
hydroxyl-terminated silicone polymer from 1 to 15 weight percent;
a cerium stabilizer from 0.1 to 1 weight percent;
acid acceptor from 0.1 to 1 weight percent;
pigment from 0.1 to 1 weight percent; and peroxide from 0.5 to 2 weight percent.

36. A silicone wiper blade compound comprising:
a methyl vinyl silicone polymer from about 22 to 55 weight percent;
a filler from about 35 to 50 weight percent;
a friction-reducing additive from about 11 to 42 weight percent; and a cerium stabilizer from about 0.1 to 1 weight percent.

37. A silicone wiper blade compound according to claim 36 further comprising:
hydroxyl-terminated silicone polymer from about 1 to 15 weight percent;
acid acceptor from about 0.1 to 1 weight percent;
pigment from about 0.1 to 1 weight percent; and peroxide from about 0.5 to 2 weight percent.

38. A silicone wiper blade compound comprising:
a methyl vinyl silicone polymer from about 22 to 55 weight percent;
a filler from about 35 to 50 weight percent;
a friction-reducing additive from about 5 to 42 weight percent;
a cerium stabilizer from about 0.1 to 1 weight percent; and wherein the friction-reducing additive has an average particle size of less than 25µ,m.

39. A silicone wiper blade compound according to claim 38 further comprising:
hydroxyl-terminated silicone polymer from about 1 to 15 weight percent;
acid acceptor from about 0.1 to 1 weight percent;
pigment from about 0.1 to 1 weight percent; and peroxide from about 0.5 to 2 weight percent.

40. A windshield wiper comprising:
a frame adapted to be attached to a vehicle;
a wiper blade attached to the frame; and wherein the wiper blade is made from a compound having a methyl vinyl silicone polymer from about 22 to 55 weight percent, a filler from about 35 to 50 weight percent, a friction-reducing additive from about 11 to 42 weight percent, and a cerium stabilizer from about 0.1 to 1 weight percent.

41. A windshield wiper according to claim 40, wherein the compound further comprises:
hydroxyl-terminated silicone polymer from about 1 to 15 weight percent;
acid acceptor from about 0.1 to 1 weight percent;
pigment from about 0.1 to 1 weight percent; and peroxide from about 0.5 to 2 weight percent.

42. A method for manufacturing a wiper blade comprising the steps of:
compounding a mixture having from about 22 to 55 weight percent of a methyl vinyl silicone polymer, from about 35 to 50 weight percent of a filler, from about to 42 weight percent of a friction-reducing additive, and from about 0.1 to 1 weight percent of a cerium stabilizer; and extruding the mixture to form the wiper blade.

43. A method for manufacturing a wiper blade according to claim 42, wherein the mixture further comprises:
hydroxyl-terminated silicone polymer from about 1 to 15 weight percent;
acid acceptor from about 0.1 to 1 weight percent;
pigment from about 0.1 to 1 weight percent; and peroxide from about 0.5 to 2 weight percent.
CA2469362A 2001-12-06 2002-12-06 Improved windshield wiper having reduced friction characteristics Expired - Fee Related CA2469362C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US33792801P 2001-12-06 2001-12-06
US60/337,928 2001-12-06
PCT/US2002/039430 WO2003050191A1 (en) 2001-12-06 2002-12-06 Improved windshield wiper having reduced friction characteristics

Publications (2)

Publication Number Publication Date
CA2469362A1 true CA2469362A1 (en) 2003-06-19
CA2469362C CA2469362C (en) 2012-02-07

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CA2469362A Expired - Fee Related CA2469362C (en) 2001-12-06 2002-12-06 Improved windshield wiper having reduced friction characteristics

Country Status (10)

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US (4) US7028367B2 (en)
EP (1) EP1461391B1 (en)
CN (1) CN1283724C (en)
AT (1) ATE430178T1 (en)
AU (1) AU2002357128B2 (en)
CA (1) CA2469362C (en)
DE (1) DE60232187D1 (en)
ES (1) ES2326366T3 (en)
WO (1) WO2003050191A1 (en)
ZA (1) ZA200404459B (en)

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US7373687B2 (en) 2008-05-20
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EP1461391B1 (en) 2009-04-29
WO2003050191A1 (en) 2003-06-19

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