WO1981001857A1 - Revetements de resistance chimique - Google Patents

Revetements de resistance chimique Download PDF

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Publication number
WO1981001857A1
WO1981001857A1 PCT/US1980/001702 US8001702W WO8101857A1 WO 1981001857 A1 WO1981001857 A1 WO 1981001857A1 US 8001702 W US8001702 W US 8001702W WO 8101857 A1 WO8101857 A1 WO 8101857A1
Authority
WO
WIPO (PCT)
Prior art keywords
epoxy
coating
resin
powders
powder according
Prior art date
Application number
PCT/US1980/001702
Other languages
English (en)
Inventor
K Gray
Original Assignee
Polymer Corp
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 Polymer Corp filed Critical Polymer Corp
Publication of WO1981001857A1 publication Critical patent/WO1981001857A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins

Definitions

  • This invention relates to coating powders and more particularly to coating powders that are especially adapted to yield coatings that are resistant to staining and chemical degradation.
  • the coating compositions of this invention are dry, free-flowing powders adapted for application to substrates by fusion coating processes.
  • fusion coating processes is here used to mean those coating processes in which powders are distributed over a' substrate and heated to above their melting points to fuse them into a continuous protective film.
  • the powders may be based either on thermoplastic resins or thermosetting resins and, in the latter case, the heating must be sufficient to cure the resins and develop their ultimate properties.
  • Examples of fusion coating processes include fluidized bed, electrostatic spraying, hot flocking, cloud chambers, fluid transport of powder through heated pipe, and the like.
  • coated articles may require that their coatings be resistant to staining and corrosion for either decorative or functional reasons.
  • decorative coatings are applied to kitchen appliances which lose their attractiveness when they became stained by such things as fruit and vegetable juices, catsup, mustard, or the like.
  • functional coatings which may be used in the oil fields to protect pipe and tubing from the corrosive effects of such things as brine, drilling muds and acid forming gases at pressures as high as 700 kg/c 2 and temperatures which not uncommonly reach 200°C.
  • Another object of this invention is to provide coatings that are stain and corrosion resistant. Another object of this invention is to provide coating powders that will provide dense, void free, highly chemical and temperature resistant films when applied by fusion coating methods.
  • the preferred hydrophobic materials for use in this invention are fumed silicas which have been treated by reacting the surface silanol groups with a silane to tie up the free hydroxyl groups and provide a hydrophobic surface.
  • a suitable hydrophobic silica for use in this invention is sold by Tulco, Inc. under its trademark Tullanox 500. This material is described as a fumed silica having a nominal particle size of 0.007 microns and a theoretical surface area of 325 square meters per gram. The surface of the fumed silica is chemically treated to replace the silanol groups with trinethyl- siloxyl groups.
  • hydrophobic material is manufacture by Degussa under its trademark Aerosil R 972. This material is described as having particle sizes in the range of from .005 to .050 microns, surface areas of fro 50 to 400 square meters per gram, and surfaces that have been made hydrophobic by reacting the silanol groups on the silica surface with alkyl chlorosilane.
  • Aerosil R 972 is manufacture by Degussa under its trademark Aerosil R 972. This material is described as having particle sizes in the range of from .005 to .050 microns, surface areas of fro 50 to 400 square meters per gram, and surfaces that have been made hydrophobic by reacting the silanol groups on the silica surface with alkyl chlorosilane.
  • DGEBA refers to diglycidal ethers of bisphenol A epoxy resins having the structure:
  • Epoxy novolac resins refers to epoxidized novolac resins having the structure
  • test panels prepared for coatin by sand blasting, deburring cleaning, degreasing and priming were heated to a temperature of 165°C.
  • the panels were coated by immersing them in a fluidized bed of the powders and postheated for 30 minutes at 205°C. to complete the curing of the coatings.
  • a uniform film thickness of from about 10 to 15 mils was obtained and when the coatings were evaluated in qualification testing for use as coatings for water flood pipe, they were found to be superior to the indust standards including liquid and solid epoxy systems and liquid epoxy/phenolics.
  • a coating powder was compounded as in Example I by melt-mixing the following ingredients: phr DGEBA - type 4 epoxy resin 50
  • a coating powder identical to that of Example II was prepared in which 1.0 phr of the hydrophobic silica of this invention (Tullanox 500) was included in the melt mixed materials.
  • Panels were sand blasted, deburred, cleaned, degreased and primed and then coated with the powders of Examples II and III.
  • the coatings were applied by pre ⁇ heating the panels to 190°C, immersing them in a fluid ⁇ ized bed of the coating powders, and then postheating th for 60 minutes at 220°C. Smooth, uniform coatings of approximately 10 mils were obtained.
  • Example IV which included the hydrophobic silica proved significantly superior in resistance to attack by the drilling muds and dissolved gases than did the coatings of Example II.
  • EXAMPLE IV phr DGEBA - type 3 epoxy resin 8.0
  • a coating material was prepared that was identical to that of Example I except that 0.5% of a hydrophobic fumed silica (Tullanox 500) was included in the formu ⁇ lation.
  • a steel panel was coated with this powder in a similar manner to the panel in Example IV.
  • Example IV and Example V were compared by exposing them to common foods that read cause staining such as grape juice, red beet juice, cats and mustard. It was found that the panels coated with the composition of Example IV was permanently stained when exposed to these foods whereas the panels coated with a composition of Example V resisted staining and the foods were easily wiped away leaving no trace of color.
  • hydrophobic silica are also extremely oleophilic. Oil will adhere to substrates coated with these materials which will provide lubricity and reduce wear in those applications in which the substrate is used in moving contact with other surfaces.
  • the hydro- phobic silica aerogels are used in coating powders based upon epoxy resins having epoxy functionalities of greate than 2, as can be achieved through the use of epoxy novolacs. Also, high filler loadings of at least 50 __r- ⁇ - parts per hundred parts resin are believed to contribute the chemical resistance of the coatings.

Abstract

La resistance chimique et aux souillures de revetements appliques par un procede de revetement par fusion est amelioree en melangeant a l'etat de fusion une petite quantite d'un aerogel de silice hydrophobe dans les poudres de revetement.
PCT/US1980/001702 1979-12-26 1980-12-18 Revetements de resistance chimique WO1981001857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10701979A 1979-12-26 1979-12-26
US107019 1979-12-26

Publications (1)

Publication Number Publication Date
WO1981001857A1 true WO1981001857A1 (fr) 1981-07-09

Family

ID=22314433

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/001702 WO1981001857A1 (fr) 1979-12-26 1980-12-18 Revetements de resistance chimique

Country Status (2)

Country Link
EP (1) EP0042852A1 (fr)
WO (1) WO1981001857A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757117A (en) * 1984-08-24 1988-07-12 Ciba-Geigy Corporation Powder coating compositions
WO1997035900A1 (fr) * 1996-03-22 1997-10-02 Ciba Specialty Chemicals Holding Inc. Resine epoxyde monocomposant utilisable comme materiau entrant dans la fabrication d'outils, de modeles ou analogues
WO2004065499A1 (fr) * 2003-01-24 2004-08-05 Tigerwerk Lack- Und Farbenfabrik Gmbh & Co. Kg Liant plastique servant a produire des peintures pulverulentes, peintures pulverulentes le contenant, et enrobages et revetements produits au moyen de celui-ci
US7462654B2 (en) * 2001-03-15 2008-12-09 Cabot Corporation Corrosion-resistant coating composition
CN100537673C (zh) * 2005-11-08 2009-09-09 财团法人工业技术研究院 隔热涂料
CN102382554A (zh) * 2011-10-12 2012-03-21 上海海隆赛能新材料有限公司 一种具有低导热系数的保温隔热重防腐涂料及其制备方法
CN104080866A (zh) * 2011-11-30 2014-10-01 住友金属矿山株式会社 底漆组合物
CN105482673A (zh) * 2016-01-06 2016-04-13 苏州环明电子科技有限公司 一种新型隔热涂料及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242131A (en) * 1962-02-23 1966-03-22 Gen Mills Inc Production of thermosetting coating powders from fatty guanamines and epoxy resins
US3338863A (en) * 1957-12-26 1967-08-29 Polymer Corp Powdered coating compositions and the method for their application
US3396140A (en) * 1964-08-21 1968-08-06 Tile Council Of America Organic acid resistant compositions from epoxy resin, polyamine and ammonium clays
US3661810A (en) * 1970-06-17 1972-05-09 Basf Wyandotte Corp Nonclumping thermoplastic particles and process of making same
US3907734A (en) * 1973-04-11 1975-09-23 Goodyear Tire & Rubber Method of producing powdered polymers
US3909487A (en) * 1973-11-28 1975-09-30 Du Pont Dry blends of polymers and fumed silicon dioxide treated with an aliphatic silane
US3939087A (en) * 1973-11-19 1976-02-17 Pitney-Bowes, Inc. Toner compositions containing silane treated fumed silica
US4169187A (en) * 1977-04-01 1979-09-25 E. I. Du Pont De Nemours And Company Powder coating composition of a mixture of epoxy resins

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338863A (en) * 1957-12-26 1967-08-29 Polymer Corp Powdered coating compositions and the method for their application
US3242131A (en) * 1962-02-23 1966-03-22 Gen Mills Inc Production of thermosetting coating powders from fatty guanamines and epoxy resins
US3396140A (en) * 1964-08-21 1968-08-06 Tile Council Of America Organic acid resistant compositions from epoxy resin, polyamine and ammonium clays
US3661810A (en) * 1970-06-17 1972-05-09 Basf Wyandotte Corp Nonclumping thermoplastic particles and process of making same
US3907734A (en) * 1973-04-11 1975-09-23 Goodyear Tire & Rubber Method of producing powdered polymers
US3939087A (en) * 1973-11-19 1976-02-17 Pitney-Bowes, Inc. Toner compositions containing silane treated fumed silica
US3909487A (en) * 1973-11-28 1975-09-30 Du Pont Dry blends of polymers and fumed silicon dioxide treated with an aliphatic silane
US4169187A (en) * 1977-04-01 1979-09-25 E. I. Du Pont De Nemours And Company Powder coating composition of a mixture of epoxy resins

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757117A (en) * 1984-08-24 1988-07-12 Ciba-Geigy Corporation Powder coating compositions
WO1997035900A1 (fr) * 1996-03-22 1997-10-02 Ciba Specialty Chemicals Holding Inc. Resine epoxyde monocomposant utilisable comme materiau entrant dans la fabrication d'outils, de modeles ou analogues
US5859096A (en) * 1996-03-22 1999-01-12 Ciba Specialty Chemicals Corporation Room temperature storage-stable, heat-curable, low CTE, one component epoxy resin tooling material
US7462654B2 (en) * 2001-03-15 2008-12-09 Cabot Corporation Corrosion-resistant coating composition
WO2004065499A1 (fr) * 2003-01-24 2004-08-05 Tigerwerk Lack- Und Farbenfabrik Gmbh & Co. Kg Liant plastique servant a produire des peintures pulverulentes, peintures pulverulentes le contenant, et enrobages et revetements produits au moyen de celui-ci
CN100537673C (zh) * 2005-11-08 2009-09-09 财团法人工业技术研究院 隔热涂料
CN102382554A (zh) * 2011-10-12 2012-03-21 上海海隆赛能新材料有限公司 一种具有低导热系数的保温隔热重防腐涂料及其制备方法
CN104080866A (zh) * 2011-11-30 2014-10-01 住友金属矿山株式会社 底漆组合物
US20140343193A1 (en) * 2011-11-30 2014-11-20 Sumitomo Metal Mining Co., Ltd. Primer composition
US9057132B2 (en) * 2011-11-30 2015-06-16 Sumitomo Metal Mining Co., Ltd. Primer composition
CN104080866B (zh) * 2011-11-30 2016-04-13 住友金属矿山株式会社 底漆组合物
CN105482673A (zh) * 2016-01-06 2016-04-13 苏州环明电子科技有限公司 一种新型隔热涂料及其制备方法

Also Published As

Publication number Publication date
EP0042852A1 (fr) 1982-01-06

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