GB908089A - A process for the production of expandable thermoplastics in a finely particled form and apparatus therefore - Google Patents

A process for the production of expandable thermoplastics in a finely particled form and apparatus therefore

Info

Publication number
GB908089A
GB908089A GB2340560A GB2340560A GB908089A GB 908089 A GB908089 A GB 908089A GB 2340560 A GB2340560 A GB 2340560A GB 2340560 A GB2340560 A GB 2340560A GB 908089 A GB908089 A GB 908089A
Authority
GB
United Kingdom
Prior art keywords
polymeric material
mixture
temperature
pressure
pressure chamber
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
GB2340560A
Inventor
Friedrich Lorenz
Paul-Heinz Schroeder
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB908089A publication Critical patent/GB908089A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • 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
    • C08J9/16—Making expandable particles

Abstract

Expandable thermoplastic polymeric material is produced in finely-particled form by mechanically mixing a thermoplastic polymeric material and a readily volatile organic expanding agent; forcing the resultant mixture, at a temperature of at least 35 DEG C. but not more than 150 DEG C. above the softening temperature of the polymeric material, into a pressure chamber, the pressure in the chamber being at least equal to the pressure of the expanding agent at the temperature of the mixture; cooling the mixture in the pressure chamber to a temperature below the softening temperature of the polymeric material; comminuting the mixture; and discharging it from the pressure chamber in a finely-particled and substantially non-porous form. Specified thermoplastic polymeric materials are polystyrene, polymethacrylic acid esters and polyvinyl chloride. Exemplified expanding agents are butane, isobutylene, pentane, hexane, cyclopentane, cyclohexane, acetane diethyl ether and carbon tetrachloride.ALSO:Expandable thermoplastic polymeric material is produced in finely particled form by mechanically mixing a thermoplastic polymeric material and a readily volatile organic expanding agent; forcing the resultant mixture, at a temperature of at least 35 DEG C but not more than 150 DEG C above the softening temperature of the polymeric material, into a pressure chamber, the pressure in the p chamber being at least equal to the pressure of the expanding agent at the temperature of the mixture; cooling the mixture in the pressure chamber to a temperature below the softening temperature of the polymeric material; comminuting the mixture; and discharging it from the pressure chamber in a finely particled and substantially non-porous form. Specified thermoplastic polymeric materials are polystyrene, polymethacrylic acid esters and polyvinyl chloride. Exemplified expanding agents are butane, isobutylene, pentane, hexane, cyclopentane, cyclohexane, acetone, diethyl ether and carbon tetrachloride.
GB2340560A 1959-07-08 1960-07-05 A process for the production of expandable thermoplastics in a finely particled form and apparatus therefore Expired GB908089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB53912A DE1174969B (en) 1959-07-08 1959-07-08 Process and device for the production of bulky thermoplastic plastics in small-scale form

Publications (1)

Publication Number Publication Date
GB908089A true GB908089A (en) 1962-10-17

Family

ID=6970422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2340560A Expired GB908089A (en) 1959-07-08 1960-07-05 A process for the production of expandable thermoplastics in a finely particled form and apparatus therefore

Country Status (2)

Country Link
DE (1) DE1174969B (en)
GB (1) GB908089A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397258A (en) * 1965-12-15 1968-08-13 Sinclair Koppers Co Process for extruding spherical expandable particles
EP0126459A2 (en) * 1983-05-19 1984-11-28 Montedison S.p.A. A process for the production of expandable granules of thermoplastic polymers and relative apparatus
EP0518140A1 (en) 1991-05-31 1992-12-16 ENICHEM S.p.A. Process for producing foamable particles of styrenic polymers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015209275B4 (en) * 2015-05-21 2017-11-23 Volkswagen Aktiengesellschaft Method and device for producing plastic foams

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH326654A (en) * 1952-07-31 1957-12-31 Lonza Ag Process for the production of cell bodies with closed cells

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397258A (en) * 1965-12-15 1968-08-13 Sinclair Koppers Co Process for extruding spherical expandable particles
EP0126459A2 (en) * 1983-05-19 1984-11-28 Montedison S.p.A. A process for the production of expandable granules of thermoplastic polymers and relative apparatus
EP0126459A3 (en) * 1983-05-19 1987-02-25 Montedison S.P.A. A process for the production of expandable granules of thermoplastic polymers and relative apparatus
EP0518140A1 (en) 1991-05-31 1992-12-16 ENICHEM S.p.A. Process for producing foamable particles of styrenic polymers

Also Published As

Publication number Publication date
DE1174969B (en) 1964-07-30

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