ES250614A1 - Improvements in or relating to extruded foamed polystyrene - Google Patents

Improvements in or relating to extruded foamed polystyrene

Info

Publication number
ES250614A1
ES250614A1 ES0250614A ES250614A ES250614A1 ES 250614 A1 ES250614 A1 ES 250614A1 ES 0250614 A ES0250614 A ES 0250614A ES 250614 A ES250614 A ES 250614A ES 250614 A1 ES250614 A1 ES 250614A1
Authority
ES
Spain
Prior art keywords
particles
polystyrene
acid
exceeding
weight
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
ES0250614A
Other languages
Spanish (es)
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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
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 Koppers Co Inc filed Critical Koppers Co Inc
Publication of ES250614A1 publication Critical patent/ES250614A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/127—Mixtures of organic and inorganic blowing agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use 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 an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

An extruder foamed polystyrene which has an average cell size not exceeding 0,004 inch, an average cell wall thickness not exceeding 0,0004 inch and a density of from 0,75 to 8 lb/cu. ft. is produced as tube or film having a thickness of from 0,005 to 0,3 inch by extruding in a conventional extrusion apparatus using a cylinder temperature of 150 DEG to 260 DEG F. and a die temperature of 225 DEG to 290 DEG F. polystyrene in the form of particles which include from 4,5 to 9% of an aliphatic hydrocarbon (b.p. 30 DEG to 90 DEG C.) and which are homogeneously admixed with a CO2 liberating agent and an acid, the acid having at least 3,0 milli-equiv. of acetic hydrogen/gram, in sufficient amount so as to produce upon reaction a total of 5% by weight of water and CO2 based on the weight of polystyrene particles. For example, 0,5% of sodium bicarbonate and 0,4% of citric acid may be homogeneously mixed with the particles. The extrudate may be heated, e.g. by passing through a tank of hot water or a steam chamber, to expand it further, or it may be treated with a blast of cold air as it leaves the die orifice to cause the formation of a tough glazed skin.ALSO:An extruded foamed polystyrene which has an average cell size not exceeding 0,004 in., an average cell wall thickness not exceeding 0,0004 in. and a density of from 0,75 to 8 lb./cu. ft. is produced as tube or film having a thickness of from 0.005 to 0,3 in. by extruding in a conventional extrusion apparatus using a cylinder temperature of 150 DEG to 260 DEG F. and a die temperature of 225 DEG to 290 DEG F., polystyrene in the form of particles which include from 4,5 to 9% of an aliphatic hydrocarbon (b.p. 30 DEG to 90 DEG C.) and which are homogeneously admixed with a CO2 liberating agent and an acid, the acid having at least 3,0 milli-equiv. of acetic hydrogen/gram, in sufficient amount so as to produce upon reaction a total of 5% by weight of water and CO2 based on the weight of polystyrene particles. For example, 0,5% of sodium bicarbonate and 0,4% of citric acid may be homogeneously mixed with the particles. The extrudate may be heated, e.g. by passing through a tank of hot water or a steam chamber, to expand it further, or it may be treated with a blast of cold air as it leaves the die orifice to cause the formation of a tough glazed skin.
ES0250614A 1958-12-17 1959-07-07 Improvements in or relating to extruded foamed polystyrene Expired ES250614A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78093458A 1958-12-17 1958-12-17

Publications (1)

Publication Number Publication Date
ES250614A1 true ES250614A1 (en) 1959-12-16

Family

ID=25121139

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0250614A Expired ES250614A1 (en) 1958-12-17 1959-07-07 Improvements in or relating to extruded foamed polystyrene

Country Status (6)

Country Link
CH (1) CH406632A (en)
DE (1) DE1200534B (en)
ES (1) ES250614A1 (en)
FR (1) FR1242535A (en)
GB (1) GB854586A (en)
NL (2) NL244620A (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144493A (en) * 1959-10-19 1964-08-11 Owens Illinois Glass Co Method of forming partly foamed plastic articles
BE609675A (en) * 1960-10-28 1900-01-01
US3151192A (en) * 1961-07-24 1964-09-29 Sun Chemical Corp Method of extruding a foamed thermoplastic product
US3227664A (en) * 1961-12-07 1966-01-04 Du Pont Ultramicrocellular structures of crystalline organic polymer
US3194864A (en) * 1961-12-11 1965-07-13 Owens Illinois Glass Co Method for producing cellular thermoplastic tubing without corrugations
US3253065A (en) * 1963-08-07 1966-05-24 Bell Telephone Labor Inc Preparation of expanded polymers
US3222437A (en) * 1962-06-18 1965-12-07 Hercules Powder Co Ltd Process for simultaneously molding and expanding stereoregular polypropylene to form a hinge
NL296971A (en) * 1962-10-03
BE638935A (en) * 1962-10-22 1900-01-01
US3281513A (en) * 1962-12-07 1966-10-25 Tecalemit Engineering Method of manufacturing a fluid filter
US3666162A (en) * 1963-02-28 1972-05-30 James R Tiffin Foamed polymer cup and method for making same
GB1047341A (en) * 1963-04-16
US3275720A (en) * 1963-04-30 1966-09-27 Haveg Industries Inc Method of extruding foamed fibers having outer skins integral therewith
US3424645A (en) * 1963-04-30 1969-01-28 Haveg Industries Inc Extruded foamed fibers
US3198859A (en) * 1963-06-04 1965-08-03 Avisun Corp Method of forming foamed plastic articles
US3299192A (en) * 1963-06-11 1967-01-17 Haveg Industries Inc Method of extruding a foamed plastic tube having internal and external skins thereon
US3310617A (en) * 1963-06-19 1967-03-21 Shell Oil Co Process for preparing uniform melt dispersion of blowing agent and polymer and its use in making foamed products
US3268636A (en) * 1963-07-01 1966-08-23 Union Carbide Corp Method and apparatus for injection molding foamed plastic articles
US3260781A (en) * 1963-07-02 1966-07-12 Haveg Industries Inc Process for thermoforming a shrinkresistant foamed polystyrene cup
US3363034A (en) * 1963-09-25 1968-01-09 Haveg Industries Inc The process of blow molding a hollow article from a tubular parison of a thermoplastic resin foam
US3542715A (en) * 1964-01-24 1970-11-24 Du Pont Foamed strand of an organic polymeric material
US3403203A (en) * 1964-03-13 1968-09-24 Grace W R & Co Method for preparing a non-woven fabric-like member
US3426111A (en) * 1964-10-19 1969-02-04 Dow Chemical Co Method and apparatus for the production of foam plastic sheet
US3415913A (en) * 1965-04-13 1968-12-10 Haveg Industries Inc Process for making a sewable polyethylene upholstery material
US3444283A (en) * 1965-11-08 1969-05-13 Mobil Oil Corp Method for direct injection extrusion of polystyrene foam
US3466353A (en) * 1966-11-29 1969-09-09 Continental Can Co Foamed resin extrusion process employing microencapsulated blowing agents
US4056587A (en) * 1975-10-20 1977-11-01 W. R. Grace & Co. Process for expanding
US4251006A (en) * 1980-01-10 1981-02-17 The Dow Chemical Company Crate assembly and materials therefor
US5162381A (en) * 1991-12-10 1992-11-10 Allied-Signal Inc. Process for preparing thermalplastic foam

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038275B (en) * 1954-11-16 1958-09-04 Koppers Co Inc Process for the production of foam polystyrene molded articles

Also Published As

Publication number Publication date
GB854586A (en) 1960-11-23
NL244620A (en)
FR1242535A (en) 1960-09-30
DE1200534B (en) 1965-09-09
NL129996C (en)
CH406632A (en) 1966-01-31

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