ES364584A1 - Polymerization process - Google Patents

Polymerization process

Info

Publication number
ES364584A1
ES364584A1 ES364584A ES364584A ES364584A1 ES 364584 A1 ES364584 A1 ES 364584A1 ES 364584 A ES364584 A ES 364584A ES 364584 A ES364584 A ES 364584A ES 364584 A1 ES364584 A1 ES 364584A1
Authority
ES
Spain
Prior art keywords
polymerization
temperature
solution
polymers
layers
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
ES364584A
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.)
ChampionX LLC
Original Assignee
Nalco 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 Nalco Chemical Co filed Critical Nalco Chemical Co
Publication of ES364584A1 publication Critical patent/ES364584A1/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
    • B29C39/006—Monomers or prepolymers
    • 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
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/52—Amides or imides
    • C08F20/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
    • C08F20/56—Acrylamide; Methacrylamide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Water-soluble polymers are prepared by polymerizing one or more polar solvent-soluble monomers, which undergo polymerization exothermically, by means of the following steps: (A) forming a polar solvent solution of the monomer(s) and a polymerization catalyst while maintaining a temperature of at least 100 F. but below the polymerization temperature, (B) forming the thus prepared solution into a layer 1-30 mm. thick, (c) heating the layer by means of a heated gas in a closed atmosphere to a temperature sufficient to initiate polymerization, and (D) thereafter continuing the polymerization in said closed atmosphere by the exothermic heat of reaction while utilizing said gas as a coolant until the desired polymerization is completed. In a preferred embodiment, the solution is formed into layers by placing in metal trays coated with polytetrafluoroethylene, and the trays heated in a drier unit wherein the heated gas is air alternatively, the layers can be formed on a conveyer belt which is moved continuously through a drying chamber. After polymerization, the temperature can be increased to remove the solvent from the polymer product. The process is suitable for the preparation of acrylamide polymers, e.g. polyacrylamide and acrylamide-acrylic acid copolymers, which polymers are useful as flocculating agents for suspensions of solid particles. Polymerization catalysts specified are azobisisobutyronitrile, ammonium persulphate, and ammonium persulphate/sodium metabisulphite. In examples polymerization is effected in aqueous solution.
ES364584A 1968-11-29 1969-02-26 Polymerization process Expired ES364584A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78028868A 1968-11-29 1968-11-29

Publications (1)

Publication Number Publication Date
ES364584A1 true ES364584A1 (en) 1971-02-01

Family

ID=25119166

Family Applications (1)

Application Number Title Priority Date Filing Date
ES364584A Expired ES364584A1 (en) 1968-11-29 1969-02-26 Polymerization process

Country Status (3)

Country Link
DE (1) DE1915903C3 (en)
ES (1) ES364584A1 (en)
GB (1) GB1262101A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3246905A1 (en) * 1982-12-18 1984-06-20 Röhm GmbH, 6100 Darmstadt METHOD FOR PRODUCING POLYMETHACRYLAMIDE AND COPOLYMERISATS THEREOF
JPS6220501A (en) * 1985-07-19 1987-01-29 Mitsubishi Rayon Co Ltd Production of water-soluble or water-swellable polymer
DE3544770A1 (en) * 1985-12-18 1987-06-19 Stockhausen Chem Fab Gmbh METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF POLYMERISATES AND COPOLYMERISATES OF ACRYLIC ACID AND / OR METHACRYLIC ACID

Also Published As

Publication number Publication date
DE1915903A1 (en) 1970-07-30
DE1915903C3 (en) 1975-02-27
DE1915903B2 (en) 1974-07-04
GB1262101A (en) 1972-02-02

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