ES250614A1 - Improvements in or relating to extruded foamed polystyrene - Google Patents
Improvements in or relating to extruded foamed polystyreneInfo
- 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
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.
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) | NL129996C (en) |
Families Citing this family (29)
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 |
NL270783A (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 | |||
US3424645A (en) * | 1963-04-30 | 1969-01-28 | Haveg Industries Inc | Extruded foamed fibers |
US3275720A (en) * | 1963-04-30 | 1966-09-27 | Haveg Industries Inc | Method of extruding foamed fibers having outer skins integral therewith |
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)
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 |
-
0
- NL NL244620D patent/NL244620A/xx unknown
- NL NL129996D patent/NL129996C/xx active
-
1959
- 1959-06-12 GB GB2022859A patent/GB854586A/en not_active Expired
- 1959-07-07 ES ES0250614A patent/ES250614A1/en not_active Expired
- 1959-11-27 CH CH8117259A patent/CH406632A/en unknown
- 1959-12-01 FR FR811819A patent/FR1242535A/en not_active Expired
- 1959-12-03 DE DEK39335A patent/DE1200534B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR1242535A (en) | 1960-09-30 |
NL129996C (en) | |
DE1200534B (en) | 1965-09-09 |
CH406632A (en) | 1966-01-31 |
GB854586A (en) | 1960-11-23 |
NL244620A (en) |
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