GB785938A - Improvements in the production of polyvinyl compounds - Google Patents

Improvements in the production of polyvinyl compounds

Info

Publication number
GB785938A
GB785938A GB459155A GB459155A GB785938A GB 785938 A GB785938 A GB 785938A GB 459155 A GB459155 A GB 459155A GB 459155 A GB459155 A GB 459155A GB 785938 A GB785938 A GB 785938A
Authority
GB
United Kingdom
Prior art keywords
monomer
per cent
chain member
catalysts
polymerization
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
GB459155A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB459155A priority Critical patent/GB785938A/en
Publication of GB785938A publication Critical patent/GB785938A/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
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/20—Aqueous medium with the aid of macromolecular dispersing agents

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)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

In the aqueous suspension polymerization of monomeric vinyl compounds, e.g. styrene and methyl methacrylate, using 0.05 to 1.5 per cent (based on monomer) of insoluble pulverulent inorganic compounds such as barium sulphate and tricalcium phosphate, and monomersoluble catalysts, 0.0001 to 0.1 per cent (based on monomer) of a silicone oil is present. The silicone oils are organopolysiloxanes and organohydroxysiloxanes of the formula MDxM, where M is a monofunctional chain member, e.g. (CH3)3Siconnected through an oxygen atom, D a difunctional chain member, e.g. -Si(CH3)2- connected through two oxygen atoms, and x is 50 to 500. Suitable catalysts are benzoyl, lauroyl and di-t-butyl peroxides, cumene hydroperoxides and azo-di-isobutyronitrile or mixtures. Polymerization may be carried out at 50-130 DEG C at a pH between 5 and 9. The granular product has a relatively uniform grain size.
GB459155A 1955-02-16 1955-02-16 Improvements in the production of polyvinyl compounds Expired GB785938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB459155A GB785938A (en) 1955-02-16 1955-02-16 Improvements in the production of polyvinyl compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB459155A GB785938A (en) 1955-02-16 1955-02-16 Improvements in the production of polyvinyl compounds

Publications (1)

Publication Number Publication Date
GB785938A true GB785938A (en) 1957-11-06

Family

ID=9780052

Family Applications (1)

Application Number Title Priority Date Filing Date
GB459155A Expired GB785938A (en) 1955-02-16 1955-02-16 Improvements in the production of polyvinyl compounds

Country Status (1)

Country Link
GB (1) GB785938A (en)

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