GB888040A - Coagulation of aqueous polymer emulsions - Google Patents

Coagulation of aqueous polymer emulsions

Info

Publication number
GB888040A
GB888040A GB11411/60A GB1141160A GB888040A GB 888040 A GB888040 A GB 888040A GB 11411/60 A GB11411/60 A GB 11411/60A GB 1141160 A GB1141160 A GB 1141160A GB 888040 A GB888040 A GB 888040A
Authority
GB
United Kingdom
Prior art keywords
specified
acid
ammonium
salts
range
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
GB11411/60A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB888040A publication Critical patent/GB888040A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
    • C08C1/00—Treatment of rubber latex
    • C08C1/14—Coagulation

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (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

A conjugated diolefin with or without a comonomer is polymerized in an alkaline aqueous medium in the presence of an emulsifying agent which loses its emulsifying property when in the acid pH range, the emulsion coagulated by mixing with an ammonium salt of an inorganic acid in an amount which moves the pH into the acid range only at at least 60 DEG C. and heating and the coagulate separated from the aqueous media. Specified diolefins are butadiene, isoprene, 2-chlorobutadiene, 3-cyanobutadiene and dimethylbutadiene, while comonomers specified are styrene, vinyl toluene, acrylonitrile, and esters of acrylic and methacrylic acids with saturated monovalent aliphatic and cycloaliphatic alcohols, preferably in amounts not greater than 40% of total monomers. Specified emulsifiers are oleic acid, linoleic acid, and the coconut fatty acids used in the form of their water-soluble salts, e.g. alkali metal salts. Specified coagulating ammonium salts are ammonium sulphate and phosphate. There may be present in the polymerization molecular weight regulators, e.g. alkyl mercaptans, and dialkyl xanthogen disulphides.
GB11411/60A 1959-04-07 1960-03-31 Coagulation of aqueous polymer emulsions Expired GB888040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE888040X 1959-04-07

Publications (1)

Publication Number Publication Date
GB888040A true GB888040A (en) 1962-01-24

Family

ID=6834035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11411/60A Expired GB888040A (en) 1959-04-07 1960-03-31 Coagulation of aqueous polymer emulsions

Country Status (1)

Country Link
GB (1) GB888040A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142042A1 (en) * 2007-05-22 2008-11-27 Lanxess Deutschland Gmbh Nitrile rubbers
WO2008142039A1 (en) * 2007-05-22 2008-11-27 Lanxess Deutschland Gmbh Nitrile rubbers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142042A1 (en) * 2007-05-22 2008-11-27 Lanxess Deutschland Gmbh Nitrile rubbers
WO2008142039A1 (en) * 2007-05-22 2008-11-27 Lanxess Deutschland Gmbh Nitrile rubbers
US8389623B2 (en) 2007-05-22 2013-03-05 Lanxess Deutschland Gmbh Nitrile rubbers
RU2479591C2 (en) * 2007-05-22 2013-04-20 ЛЕНКСЕСС Дойчланд ГмбХ Nitrile rubber
US8664340B2 (en) 2007-05-22 2014-03-04 Lanxess Deutschland Gmbh Nitrile rubbers

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