GB795999A - Removal of volatile ingredients from thermoplastic polymers - Google Patents

Removal of volatile ingredients from thermoplastic polymers

Info

Publication number
GB795999A
GB795999A GB20909/56A GB2090956A GB795999A GB 795999 A GB795999 A GB 795999A GB 20909/56 A GB20909/56 A GB 20909/56A GB 2090956 A GB2090956 A GB 2090956A GB 795999 A GB795999 A GB 795999A
Authority
GB
United Kingdom
Prior art keywords
styrene
polymers
polymer
aluminium
leading
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
GB20909/56A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB795999A publication Critical patent/GB795999A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/06—Treatment of polymer solutions
    • C08F6/10—Removal of volatile materials, e.g. solvents

Landscapes

  • Chemical & Material Sciences (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)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Vaporizable organic ingredients or impurities are separated from mixtures with non-volatile vinylidene polymers without contaminating the polymer with dark-coloured products, by heating at less than 270 DEG C. in a vessel in which the portions that are contacted with the vapours are composed of or coated with aluminium or a metal composition containing aluminium as the principal ingredient and free of metals higher than magnesium in the electromotive series. A suitable devolatilizer comprises a jacketed kettle 1, with a valved inlet 3 for the polymer composition leading to a perforated cup 4, which permits the composition to fall as thin streams. An optional valved inlet 8 for inert gas, a valved vapour outlet 11 leading to a pump, and a bottom outlet 14 for the molten polymer leading to an extruder are also fitted. Thermoplastic vinyl aromatic resins, e.g. polystyrene, polyvinyl toluene polymers of ar-chlorostyrene, <PICT:0795999/III/1> polyethylene and copolymers of styrene with acrylonitrile and styrene with butadiene may be heated.ALSO:<PICT:0795999/IV (a)/1> Vaporizable organic ingredients or impurities are separated from mixtures with non-volatile vinylidene polymers without contaminating the polymer with dark-coloured products by heating at less than 270 DEG C. in a vessel in which portions that are contacted with the vapours are composed of or coated with aluminium or a metal composition containing aluminium as the principal ingredient and free of metals higher than magnesium in the electromotive series. Vinyl aromatic resins, e.g. polystyrene, polyvinyl toluene, polymers of ar-chlorostyrene, polyethylene and copolymers of styrene with acrylonitrile and styrene with butadiene may be treated. A suitable devolatilizer is described (see Group III).
GB20909/56A 1955-07-07 1956-07-05 Removal of volatile ingredients from thermoplastic polymers Expired GB795999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US795999XA 1955-07-07 1955-07-07

Publications (1)

Publication Number Publication Date
GB795999A true GB795999A (en) 1958-06-04

Family

ID=22151566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20909/56A Expired GB795999A (en) 1955-07-07 1956-07-05 Removal of volatile ingredients from thermoplastic polymers

Country Status (1)

Country Link
GB (1) GB795999A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361650A (en) * 1965-09-03 1968-01-02 Chemical Process Corp Phthalic anhydride treatment in the presence of hbr in an aluminum vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361650A (en) * 1965-09-03 1968-01-02 Chemical Process Corp Phthalic anhydride treatment in the presence of hbr in an aluminum vessel

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