RO85540B1 - Process for the suspension polymerization of vinyl chloride - Google Patents

Process for the suspension polymerization of vinyl chloride

Info

Publication number
RO85540B1
RO85540B1 RO108459A RO10845982A RO85540B1 RO 85540 B1 RO85540 B1 RO 85540B1 RO 108459 A RO108459 A RO 108459A RO 10845982 A RO10845982 A RO 10845982A RO 85540 B1 RO85540 B1 RO 85540B1
Authority
RO
Romania
Prior art keywords
vinyl chloride
suspension polymerization
mixture
alkali
alkalinization
Prior art date
Application number
RO108459A
Other languages
Romanian (ro)
Other versions
RO85540A2 (en
Inventor
Paul Osanu
Radu Negretu
Grigore Arnautiu
Stefan Curcaneanu
Emilian Georgescu
Rodica Davidoi
Marin Georgescu
Petru Gluck
Original Assignee
Centrul De Cercetari
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 Centrul De Cercetari filed Critical Centrul De Cercetari
Priority to RO108459A priority Critical patent/RO85540B1/en
Publication of RO85540A2 publication Critical patent/RO85540A2/en
Publication of RO85540B1 publication Critical patent/RO85540B1/en

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Inventia se refera la un procedeu pentru polimerizarea clorurii de vinil cu densitate mare si spectru granulometric îngust, în prezenta unui amestec de agenti de suspensie format din metilhidroxipropilceluloza si hidroxipropilceluloza, care consta în aceea ca reactia de polimerizare se conduce la un pH cuprins între 7,5 si 11,5 de preferinta între 8 si 10, care se realizeaza prin utilizarea unui adaos pentru alcalinizare, în proportie de 0,01...0,10% fata de clorura de vinil, de preferinta 0,02...0,04% constînd dintr-un hidroxid alcalin sau alcalino-pamîntos, un carbonat sau bicarbonat alcalin, hidroxid de amoniu sau un amestec al acestora.The invention relates to a process for polymerizing high density vinyl chloride and narrow granulometric spectrum in the presence of a mixture of suspending agents consisting of methylhydroxypropylcellulose and hydroxypropylcellulose, which consists in that the polymerization reaction is carried out at a pH of between 7, 5 and 11.5 preferably between 8 and 10, which is achieved by using an addition for alkalinization in a proportion of 0.01 ... 0.10% to vinyl chloride, preferably 0.02 ... 0 , 04% consisting of an alkali or alkaline earth metal hydroxide, an alkali carbonate or bicarbonate, ammonium hydroxide or a mixture thereof.

RO108459A 1982-08-17 1982-08-17 Process for the suspension polymerization of vinyl chloride RO85540B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO108459A RO85540B1 (en) 1982-08-17 1982-08-17 Process for the suspension polymerization of vinyl chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO108459A RO85540B1 (en) 1982-08-17 1982-08-17 Process for the suspension polymerization of vinyl chloride

Publications (2)

Publication Number Publication Date
RO85540A2 RO85540A2 (en) 1984-10-31
RO85540B1 true RO85540B1 (en) 1984-11-30

Family

ID=20111953

Family Applications (1)

Application Number Title Priority Date Filing Date
RO108459A RO85540B1 (en) 1982-08-17 1982-08-17 Process for the suspension polymerization of vinyl chloride

Country Status (1)

Country Link
RO (1) RO85540B1 (en)

Also Published As

Publication number Publication date
RO85540A2 (en) 1984-10-31

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