GB881726A - Producing foamed or porous coatings - Google Patents

Producing foamed or porous coatings

Info

Publication number
GB881726A
GB881726A GB36207/58A GB3620758A GB881726A GB 881726 A GB881726 A GB 881726A GB 36207/58 A GB36207/58 A GB 36207/58A GB 3620758 A GB3620758 A GB 3620758A GB 881726 A GB881726 A GB 881726A
Authority
GB
United Kingdom
Prior art keywords
coating
particles
heated
resins
polythene
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
Application number
GB36207/58A
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.)
Polymer Corp
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 GB881726A publication Critical patent/GB881726A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A substrate is provided with a foamed coating by immersing it in a fluidized bed of particles while heated to at least the softening temperature of the particles so as to form a softened mass of material on the surface, producing gaseous material within the resultant melt, and allowing the melt to set with the gaseous material therein. More than one coating may be applied, and the surface may subsequently be re-heated. The gaseous material may be produced by adding a blowing agent to the particles, by using a volatile liquid, or by applying a vacuum or an excessively high temperature, or it may consist of gaseous reaction products. The particles may be of polyvinyl chloride, polystyrene, polyethylene, plasticized cellulose ethers and esters, phenolic resins, polyamides, epoxy resins, urea- or melamine-aldehyde resins, acetal resins, polyvinyl acetate, polyurethanes, silicone resins or shellac, or mixtures thereof. The components of a polyurethane may be applied separately, the carbon dioxide evolved acting as foaming agent. Blowing agents which may be added include N, N1-dinitroso-pentamethylene-tetramine, diazoaminobenzene, azodicarbonamide, 2, 21-azo-isobutyronitrile, azohexahydrobenzonitrile, benzene sulphonylhydrazide p, p1-oxy-bis-benzene sulphonylhydrazide, p-tert-butyl benzoyl azide, a mixture of urea and biuret, ammonium bicarbonate, sodium bicarbonate, sodium nitrate or mixtures thereof. Other additives may include carbon black, graphite, molybdenum sulphide, titanium dioxide and zinc oxide. Surfaces which may be coated include metal, paper, wood, glass, hardboard, plasterboard, and textiles. Examples are given of (1) coating copper tubing with polythene containing diazoaminobenzene; (2) coating a steel rod with a silicone resin containing a foaming agent; (3) coating a steel rod with polyvinyl chloride containing stabilizer, plasticizer, pigment and azodicarbonamide; (4) applying two successive coats as in (3); (5) coating a sandblasted aluminium rod with polythene and applying a partial vacuum to cause the formation of bubbles; (6) coating steel rods and sheets with a phenol-formaldehyde resin containing water and in which water was evolved as a result of polymerization-depolymerization reactions, said water acting as foaming agent; (7) aluminium foil heated much above the softening point of polyvinyl chloride and passed continuously through a fluidized bed of that polymer; (8) a continuous web of fibreglass cloth, heated and passed through polythene containing a blowing agent. Specification 759,214 is referred to.ALSO:A substrate is provided with a foamed coating by immersing it in a fluidized bed of particles while heated to at least the softening temperature of the particles so as to form a softened mass of material on the surface, producing gaseous material within the resultant melt, and allowing the melt to set with the gaseous material therein. More than one coating may be applied, and the surface may subsequently be re-heated. The gaseous material may be produced by adding a blowing agent to the particles, by using a volatile liquid, or by applying a vacuum or an excessively high temperature, or it may consist of gaseous reaction products. The particles may be of polyvinyl chloride, polystyrene, polyethylene, plasticized cellulose ethers and esters, phenolic resins, polyamides, epoxy resins, urea- or melamine-aldehyde resins, acetal resins, polyvinyl acetate, polyurethanes, silicone resins or shellac, or mixtures thereof. The components of a polyurethane may be applied separately, the carbon dioxide evolved acting as foaming agent. Blowing agents which may be added include N,N1-dinitroso pentamethylene tetramine, diazoaminobenzene, azodicarbonamide, 2,21-azoisobutyronitrile, azo-hexahydrobenzonitrile, benzene sulphonylhydrazide, p,p1,oxy-bis-benzene sulphonylhydrazide, p-tert-butyl benzoyl azide, a mixture of urea and biuret, ammonium bicarbonate, sodium bicarbonate, sodium nitrate or mixtures thereof. Other additives may include carbon black, graphite, molybdenum sulphide, titanium dioxide and zinc oxide. Surfaces which may be coated include metal, paper, wood, glass, hardboard, plasterboard, and textiles. Examples are given of (1) coating copper tubing with polythene containing diazoaminobenzene; (2) coating a steel rod with a silicone resin containing a foaming agent; (3) coating a steel rod with polyvinyl chloride containing stabilizer, plasticizer, pigment and azodicarbonamides; (4) applying two successive coats as in (3); (5) coating a sandblasted aluminium rod with polythene and applying a partial vacuum to cause the formation of bubbles; (6) coating steel rods and sheets with a phenol-formaldehyde resin containing water and in which water was evolved as a result of polymerization-depolymerization reactions, said water acting as foaming agent; (7) aluminium foil-heated much above the softening point of polyvinyl chloride was passed continuously through a fluidized bed of that polymer; (8) a continuous web of fibreglass cloth was heated and passed through polythene containing a blowing agent. Specification 759,214 is referred to.ALSO:A substrate is provided with a foamed coating by immersing it in a fluidised bed of particles while heated to at least the softening temperature of the particles so as to form a softened mass of material on the surface, producing gaseous material within the resultant melt, and allowing the melt to set with the gaseous material therein. More than one coating may be applied, and the surface may subsequently be re-heated. The gaseous material may be produced by adding a blowing agent to the particles, by using a volatile liquid, or by applying a vacuum or an excessively high temperature, or it may consist of gaseous reaction products. The particles may be of polyvinyl chloride, polystyrene, polyethylene, plasticised cellulose ethers and esters, phenolic resins, polyamides, epoxy resins, urea or melamine-aldehyde resins, acetal resins, polyvinyl acetate, polyurethanes, silicone resins or shellac, or mixtures thereof. The components of a polyurethane may be applied separately, the carbon dioxide evolved acting as foaming agent. Blowing agents which may be added include N,N1-dinitroso pentamethylene tetramine, diazoaminobenzene, azodicarbonamide, 2,21-azo-iso butyronitrile, azohexahydrobenzonitrile, benzene sulphonylhydrazide, p.p1-oxybis-benzene sulphonylhydrazide, p-tert-butyl benzoyl azide, a mixture of urea and biuret, ammonium bicarbonate, sodium bicarbonate, sodium nitrate or mixtures thereof. Other additives may include carbon black, graphite, molybdenum sulphide, titanium dioxide and zinc oxide. Surfaces which may be coated include metal, paper, wood, glass, hardboard, plasterboard, and textiles. Examples are given of (1) coating copper tubing with polythene containing diazoaminobenzene; (2) coating a steel rod with a silicone resin containing a foaming agent; (3) coating a steel rod with polyvinyl chloride containing stabiliser, plasticiser, pigment and azodicarbonamide; (4) applying two successive coats as in (3); (5) coating a sandblasted aluminium rod with polythene and applying a partial vacuum to cause the formation of bubbles; (6) coating steel rods and sheets with a phenol-formaldehyde resin containing water and in which water was evolved as a result of polymerisation-depolymerisation reactions, said water acting as foaming agent; (7) aluminium foil heated much above the softening point of polyvinyl chloride was passed continuously through a fluidised bed of that polymer; (8) a continuous web of fibreglass cloth was heated and passed through polythene containing a blowing agent. Specification 759,214 is referred to.
GB36207/58A 1957-11-13 1958-11-11 Producing foamed or porous coatings Expired GB881726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US881726XA 1957-11-13 1957-11-13

Publications (1)

Publication Number Publication Date
GB881726A true GB881726A (en) 1961-11-08

Family

ID=22209780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36207/58A Expired GB881726A (en) 1957-11-13 1958-11-11 Producing foamed or porous coatings

Country Status (1)

Country Link
GB (1) GB881726A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248882B (en) * 1990-10-04 1994-11-16 Bosch Gmbh Robert Fuel supply apparatus for internal combustion engines
WO2014135154A1 (en) * 2013-03-08 2014-09-12 ReflectoTec KG Building material additive, building material and use thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248882B (en) * 1990-10-04 1994-11-16 Bosch Gmbh Robert Fuel supply apparatus for internal combustion engines
WO2014135154A1 (en) * 2013-03-08 2014-09-12 ReflectoTec KG Building material additive, building material and use thereof

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