GB634647A - Improvements in or relating to the polymerization in aqueous dispersion of polymerizable organic compounds - Google Patents

Improvements in or relating to the polymerization in aqueous dispersion of polymerizable organic compounds

Info

Publication number
GB634647A
GB634647A GB26696/46A GB2669646A GB634647A GB 634647 A GB634647 A GB 634647A GB 26696/46 A GB26696/46 A GB 26696/46A GB 2669646 A GB2669646 A GB 2669646A GB 634647 A GB634647 A GB 634647A
Authority
GB
United Kingdom
Prior art keywords
polymerization
polymer
dispersion
esters
aqueous dispersion
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
GB26696/46A
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.)
Goodrich Corp
Original Assignee
BF Goodrich Corp
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 BF Goodrich Corp filed Critical BF Goodrich Corp
Publication of GB634647A publication Critical patent/GB634647A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F291/00Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polymerisation Methods In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

One or more organic compounds containing a single CH2=C< grouping are polymerized in aqueous dispersion to produce particles of predetermined size by a process comprising providing in the dispersion a known number of polymer particles of the same compound(s) or of a different polymer compatible with the polymer to be produced and of known dimensions, and maintaining present during polymerization 20-60 per cent of the theoretical amount of dispersing agent necessary to form a unimolar layer on these particles. A substantial proportion of a previously prepared aqueous dispersion containing the polymer particles may be added to the monomer dispersion before polymerization occurs. Preferably the ratio of monomer to polymer present in the reaction mixture is always less than two to one during the course of polymerization. Preferred polymerizable compounds are vinyl and vinylidene chlorides and mixtures thereof with each other and with lesser proportions of vinyl esters and esters of acrylic and substituted acrylic acids. Other polymerizable compounds listed are styrene, p-chlorostyrene, esters of acrylic and substituted acrylic acids, acrylo- and methacrylo-nitriles, acrylamide, vinyl esters, ethers and ketones, ethylene, isobutylene and N-vinyl pyrrole, carbazole, indole and succinamide and mixtures thereof. In carrying out the process the average diameter of the polymer particles initially present is determined, e.g. by X-ray or electron diffraction methods, and the weight of polymer present also determined. The calculation of the amount of dispersing agent theoretically required is described and 20-68 per cent of this value added to the dispersion. Polymerization is carried out, additional dispersing agent being added during the reaction to maintain its concentration within the required range. Specified dispersing agents are stearates, oleates, palmitates, myristates, rosin, dehydrogenated rosin soaps, hymolal sulphates, alkaryl sulphonates, dialkyl succinamates and sodium N-octadecyl-N-1.2-dicarboxyethyl sulphosuccinamate. Preferably the monomer is introduced gradually during the reaction. Polymerization catalysts may be used, e.g. benzoyl, caprylyl and hydrogen peroxides, potassium ferricyanide, sodium perborate, percarbonates, persulphates and mixtures thereof. The hydrogen ion concentration may be controlled by addition of ammonium hydroxide or sodium hydroxide, bicarbonate or acid phosphate or of lead acetate.
GB26696/46A 1945-11-06 1946-09-05 Improvements in or relating to the polymerization in aqueous dispersion of polymerizable organic compounds Expired GB634647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US634647XA 1945-11-06 1945-11-06

Publications (1)

Publication Number Publication Date
GB634647A true GB634647A (en) 1950-03-22

Family

ID=22049381

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26696/46A Expired GB634647A (en) 1945-11-06 1946-09-05 Improvements in or relating to the polymerization in aqueous dispersion of polymerizable organic compounds

Country Status (2)

Country Link
DE (1) DE843163C (en)
GB (1) GB634647A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879256A (en) * 1954-11-26 1959-03-24 Eastman Kodak Co Continuous process for preparing vinyl or vinylidene chloride graft polymers of improved solubility
BE628582A (en) * 1962-02-19
DE1301905B (en) * 1964-11-10 1969-08-28 Rexall Drug Chemical Process for the production of a graft polymer

Also Published As

Publication number Publication date
DE843163C (en) 1952-07-07

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