US2681310A - Treating aluminum surfaces - Google Patents

Treating aluminum surfaces Download PDF

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Publication number
US2681310A
US2681310A US12353249A US2681310A US 2681310 A US2681310 A US 2681310A US 12353249 A US12353249 A US 12353249A US 2681310 A US2681310 A US 2681310A
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US
United States
Prior art keywords
anode
aluminum
treating
subjecting
aluminum surfaces
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.)
Expired - Lifetime
Application number
Inventor
William H Wood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harris Corp
Original Assignee
Harris Seybold Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harris Seybold Co filed Critical Harris Seybold Co
Priority to US12353249 priority Critical patent/US2681310A/en
Application granted granted Critical
Publication of US2681310A publication Critical patent/US2681310A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/04—Shells for rollers of printing machines for damping rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/30—Change of the surface
    • B05D2350/33—Roughening
    • B05D2350/40—Roughening by adding a porous layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/102—Pretreatment of metallic substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • This invention relates to the treating or coating of the surface of articles; and it is among the objects of the invention to provide on aluminum,
  • alloys thereof, and the like a surface having not only improved texture, but also remarkable properties as affecting moisture receptiveness and retentiveness.
  • the invention comprises the features hereinafter fully described, and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.
  • the surfaces to be treated are, 1n accordance with the invention, provided with a facing bonded with the metal as to be in practical result durably united thereto.
  • a surface or article of aluminum or the like is activated by treating in an electrolytic bath, being connected as anode therein, the bath being of suitable composition providing an abundance of oxygen available at the anode. While customary plating amperages cent of an acid, as sulphuric, oxalic, chromic, etc., 7
  • bath compositions as known in the ordinary anodizing of aluminum may be employed.
  • the electrolytic treatment is applied for a few minutes, more or less, according to the nature and size of the surface and extent of action desired, the surface thereby being activated for the next operation which is the subjection to a hot bath of organic hydrophilic colloid dissolved in water.
  • Acid or alkali may be added to effect riod of for instance ten to thirty minutes, de-
  • organic hydrophilic colloids employed are polyacrylic compounds, such as polyacrylic acid, polymethacrylic acid, salts and partial esters of these acids. Applied under the conditions noted,
  • This coating provides a distinctive and particularly strong bond.
  • the resulting surface is the reaction product of such compound and the oxidized aluminum and is highly receptive and retentive for moisture, and possesses high mechanical strength.
  • the concentration of colloid is not critical, and should be sufiicient to provide enough for reaction with the surface involved, and in general the concentration need not exceed 15 per cent.
  • Lithographic plates, dampening rollers for lithographic printing, and the like, thus prepared have a surface of particular durability and desirable texture, coupled with a remarkable ability to attract and carry water in evenly distributed manner.
  • a process of treating an aluminum surface which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the sotreated surface to polyacrylic acid in aqueous medium at a raised temperature not substantially above 100 C.
  • a process of treating an aluminum surface which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the sotreated surface to polyacrylic acid in aqueous medium at a temperature of ESQ-100 C.
  • a process of treating an aluminum surface which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the so- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Mason Apr. 26, 1938 Wescott May 31, 1938 Robinson et a1. Oct. 3, 1939 Wood Jan. 16, 1940 Schenk Feb. 11, 1941 Graenacher et a1. Apr. 8, 1941

Description

Patented June 15, 1954 2,681,310 TREATING ALUMINUM SURFACES William H. Wood, Mantua, Ohio, assignor to Harris-Seybold Com corporation of Delaw pany, Cleveland, Ohio, at
No Drawing. Application October 25, 1949,
Serial No.
4 Claims.
This invention relates to the treating or coating of the surface of articles; and it is among the objects of the invention to provide on aluminum,
alloys thereof, and the like, a surface having not only improved texture, but also remarkable properties as affecting moisture receptiveness and retentiveness.
To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described, and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.
The surfaces to be treated, as for instance plates, sheets, rollers or shaped articles as desired, are, 1n accordance with the invention, provided with a facing bonded with the metal as to be in practical result durably united thereto. In the practice of my process, a surface or article of aluminum or the like is activated by treating in an electrolytic bath, being connected as anode therein, the bath being of suitable composition providing an abundance of oxygen available at the anode. While customary plating amperages cent of an acid, as sulphuric, oxalic, chromic, etc., 7
increases the conductivity and rate of action. In some cases bath compositions as known in the ordinary anodizing of aluminum may be employed. The electrolytic treatment is applied for a few minutes, more or less, according to the nature and size of the surface and extent of action desired, the surface thereby being activated for the next operation which is the subjection to a hot bath of organic hydrophilic colloid dissolved in water. Acid or alkali may be added to effect riod of for instance ten to thirty minutes, de-
pending up the extent of action desired.
The organic hydrophilic colloids employed are polyacrylic compounds, such as polyacrylic acid, polymethacrylic acid, salts and partial esters of these acids. Applied under the conditions noted,
this coating provides a distinctive and particularly strong bond. The resulting surface is the reaction product of such compound and the oxidized aluminum and is highly receptive and retentive for moisture, and possesses high mechanical strength.
The concentration of colloid is not critical, and should be sufiicient to provide enough for reaction with the surface involved, and in general the concentration need not exceed 15 per cent.
Lithographic plates, dampening rollers for lithographic printing, and the like, thus prepared have a surface of particular durability and desirable texture, coupled with a remarkable ability to attract and carry water in evenly distributed manner. Similarly, humidifier plates for air-= conditioning apparatus, humidcr cans for photographic film and other materials requiring storage in moist atmosphere, as well as aluminum articles of every description where surfacing of such characteristics is desired, may thus be prepared.
This application is a continuation-in-part of my application Serial No. 430,772 filed February 13, 1942, now adandoned, which in turn was a continuation, in part and as to common subject matter, of my application Serial No. 195,362, filed March 11, 1938, now abandoned.
Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.
I therefore particularly point out and distinctly claim as my invention:
1. A process of treating an aluminum surface, which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the sotreated surface to polyacrylic acid in aqueous medium at a raised temperature not substantially above 100 C.
2. A process of treating an aluminum surface, which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the sotreated surface to polyacrylic acid in aqueous medium at a temperature of ESQ-100 C.
3. A process of treating an aluminum surface, which comprises subjecting the aluminum surface connected as an anode to electrolytic anodic treatment in aqueous acid solution providing oxygen at the anode, and then subjecting the so- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Mason Apr. 26, 1938 Wescott May 31, 1938 Robinson et a1. Oct. 3, 1939 Wood Jan. 16, 1940 Schenk Feb. 11, 1941 Graenacher et a1. Apr. 8, 1941

Claims (1)

1. A PROCESS OF TREATING AN ALUMINUM SURFACE, WHICH COMPRISES SUBJECTING THE ALUMINUM SURFACE CONNECTED AS AN ANODE TO ELECTROLYTIC ANODIC TREATMENT IN AQUEOUS ACID SOLUTION PROVIDING OXYGEN AT THE ANODE, AND THEN SUBJECTING THE SOTREATED SURFACE TO POLYACRYLIC ACID IN AQUEOUS MEDIUM AT A RAISED TEMPERATURE NOT SUBSTANTIALLY ABOVE 100* C.
US12353249 1949-10-25 1949-10-25 Treating aluminum surfaces Expired - Lifetime US2681310A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764537A (en) * 1954-03-31 1956-09-25 Stillman Rubber Co Composite article and method of manufacture
US3072546A (en) * 1959-03-02 1963-01-08 Lawton Printing Company Graining printing plates
US3148057A (en) * 1961-03-23 1964-09-08 Azoplate Corp Material for electrophotographic purposes
US3169065A (en) * 1960-10-11 1965-02-09 Harris Intertype Corp Method of making resist and deep etch lithographic printing plates with ferric ammonium compound sensitized plates
US3298852A (en) * 1963-02-07 1967-01-17 Dick Co Ab Metal offset plate and method for manufacture
US3418935A (en) * 1962-09-06 1968-12-31 Harris Intertype Corp Ink transfer member
US3424580A (en) * 1965-09-07 1969-01-28 Horizons Inc Photographic process for the direct production of positive images on metal
US3455003A (en) * 1962-09-06 1969-07-15 Harris Intertype Corp Water transfer member
US3511661A (en) * 1966-07-01 1970-05-12 Eastman Kodak Co Lithographic printing plate
FR2380147A1 (en) * 1977-02-09 1978-09-08 Polychrome Corp PROCESS FOR THE PRODUCTION OF PLATES FOR LITHOGRAPHIC PRINTING
FR2391488A1 (en) * 1977-05-19 1978-12-15 Polychrome Corp WATER-BASED LITHOGRAPHIC PRINTING PLATE
WO1987006534A2 (en) * 1986-05-03 1987-11-05 Kurt Zecher Gmbh Ink transfer roller with oxide layer
US4705696A (en) * 1984-09-27 1987-11-10 Olin Hunt Specialty Products Inc. Method of making a lithographic printing plate, printing plates made by the method, and the use of such printing plates to make lithographic prints

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2115339A (en) * 1932-10-27 1938-04-26 Aluminum Co Of America Photographic plate
US2119031A (en) * 1934-05-25 1938-05-31 Addressograph Multigraph Planographic printing plate
US2174840A (en) * 1939-10-03 Electrical condenser
US2186945A (en) * 1937-06-16 1940-01-16 Harris Seybold Potter Co Preparing lithographic plates for printing
US2231373A (en) * 1935-01-08 1941-02-11 Firm Ematal Electrochemical Co Coating of articles of aluminum or aluminum alloys
US2237483A (en) * 1938-01-15 1941-04-08 Soc Of Chemical Ind Colored oxide film on metals consisting of the class of aluminum and alloys thereof and process of producing same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2174840A (en) * 1939-10-03 Electrical condenser
US2115339A (en) * 1932-10-27 1938-04-26 Aluminum Co Of America Photographic plate
US2119031A (en) * 1934-05-25 1938-05-31 Addressograph Multigraph Planographic printing plate
US2231373A (en) * 1935-01-08 1941-02-11 Firm Ematal Electrochemical Co Coating of articles of aluminum or aluminum alloys
US2186945A (en) * 1937-06-16 1940-01-16 Harris Seybold Potter Co Preparing lithographic plates for printing
US2237483A (en) * 1938-01-15 1941-04-08 Soc Of Chemical Ind Colored oxide film on metals consisting of the class of aluminum and alloys thereof and process of producing same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764537A (en) * 1954-03-31 1956-09-25 Stillman Rubber Co Composite article and method of manufacture
US3072546A (en) * 1959-03-02 1963-01-08 Lawton Printing Company Graining printing plates
US3169065A (en) * 1960-10-11 1965-02-09 Harris Intertype Corp Method of making resist and deep etch lithographic printing plates with ferric ammonium compound sensitized plates
US3148057A (en) * 1961-03-23 1964-09-08 Azoplate Corp Material for electrophotographic purposes
US3455003A (en) * 1962-09-06 1969-07-15 Harris Intertype Corp Water transfer member
US3418935A (en) * 1962-09-06 1968-12-31 Harris Intertype Corp Ink transfer member
US3298852A (en) * 1963-02-07 1967-01-17 Dick Co Ab Metal offset plate and method for manufacture
US3424580A (en) * 1965-09-07 1969-01-28 Horizons Inc Photographic process for the direct production of positive images on metal
US3511661A (en) * 1966-07-01 1970-05-12 Eastman Kodak Co Lithographic printing plate
FR2380147A1 (en) * 1977-02-09 1978-09-08 Polychrome Corp PROCESS FOR THE PRODUCTION OF PLATES FOR LITHOGRAPHIC PRINTING
US4148649A (en) * 1977-02-09 1979-04-10 Polychrome Corporation Method for producing lithographic printing plates
FR2391488A1 (en) * 1977-05-19 1978-12-15 Polychrome Corp WATER-BASED LITHOGRAPHIC PRINTING PLATE
US4705696A (en) * 1984-09-27 1987-11-10 Olin Hunt Specialty Products Inc. Method of making a lithographic printing plate, printing plates made by the method, and the use of such printing plates to make lithographic prints
WO1987006534A2 (en) * 1986-05-03 1987-11-05 Kurt Zecher Gmbh Ink transfer roller with oxide layer
WO1987006534A3 (en) * 1986-05-03 1988-01-14 Zecher Gmbh Kurt Ink transfer roller with oxide layer

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