JPS57195107A - Preparation of vinyl chloride polymer - Google Patents
Preparation of vinyl chloride polymerInfo
- 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
Links
Landscapes
- 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
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) |
-
1981
- 1981-05-25 JP JP7804881A patent/JPS57195107A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0225924B2 (en) | 1990-06-06 |
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