JPS57195107A - Preparation of vinyl chloride polymer - Google Patents

Preparation of vinyl chloride polymer

Info

Publication number
JPS57195107A
JPS57195107A JP7804881A JP7804881A JPS57195107A JP S57195107 A JPS57195107 A JP S57195107A JP 7804881 A JP7804881 A JP 7804881A JP 7804881 A JP7804881 A JP 7804881A JP S57195107 A JPS57195107 A JP S57195107A
Authority
JP
Japan
Prior art keywords
vinyl chloride
mol
chloride polymer
monomer
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.)
Granted
Application number
JP7804881A
Other languages
Japanese (ja)
Other versions
JPH0225924B2 (en
Inventor
Katsuo Mitani
Takashi Maehara
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.)
Tokuyama Corp
Original Assignee
Tokuyama 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 Tokuyama Corp filed Critical Tokuyama Corp
Priority to JP7804881A priority Critical patent/JPS57195107A/en
Publication of JPS57195107A publication Critical patent/JPS57195107A/en
Publication of JPH0225924B2 publication Critical patent/JPH0225924B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE: To obtain a high-mol.wt. vinyl chloride polymer having a specific polymerization degree, high bulk specific gravity, and improved gelatinizing properties, by adding newly a vinyl chloride monomer and a dispersant to a low-mol.wt. vinyl chloride polymer.
CONSTITUTION: In an aqueous medium, first a vinyl chloride monomer or a mixture of the vinyl chloride monomer and another monomer (e.g., olefin compound) copolymerizable with it is polymerized in the presence of a dispersant (e.g., gelatin) and a chain transfer agent (e.g., organic mercaptan) to give a low- mol.wt. vinyl chloride polymer having a polymerization degree of 200W 600. A new vinyl chloride monomer or a mixture of it and another monomer copolymerizable with it and the dispersant are added to the polymerization system of the first stage, to give a high-mol.wt. vinyl chloride polymer having a polymerization degree higher than 600. The difference of the polymerization degree between the low-mol.wt. vinyl chloride polymer obtained in the first-stage polymerization and the high-mol.wt. vinyl chloride polymer obtained in the second polymerization is preferably ≥200.
COPYRIGHT: (C)1982,JPO&Japio
JP7804881A 1981-05-25 1981-05-25 Preparation of vinyl chloride polymer Granted JPS57195107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7804881A JPS57195107A (en) 1981-05-25 1981-05-25 Preparation of vinyl chloride polymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7804881A JPS57195107A (en) 1981-05-25 1981-05-25 Preparation of vinyl chloride polymer

Publications (2)

Publication Number Publication Date
JPS57195107A true JPS57195107A (en) 1982-11-30
JPH0225924B2 JPH0225924B2 (en) 1990-06-06

Family

ID=13650959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7804881A Granted JPS57195107A (en) 1981-05-25 1981-05-25 Preparation of vinyl chloride polymer

Country Status (1)

Country Link
JP (1) JPS57195107A (en)

Also Published As

Publication number Publication date
JPH0225924B2 (en) 1990-06-06

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