JPS5474889A - Preparation of methyl methacrylate polymer - Google Patents
Preparation of methyl methacrylate polymerInfo
- Publication number
- JPS5474889A JPS5474889A JP14254477A JP14254477A JPS5474889A JP S5474889 A JPS5474889 A JP S5474889A JP 14254477 A JP14254477 A JP 14254477A JP 14254477 A JP14254477 A JP 14254477A JP S5474889 A JPS5474889 A JP S5474889A
- Authority
- JP
- Japan
- Prior art keywords
- methyl methacrylate
- polymerization
- polymer
- temperature
- monomer
- 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.)
- Pending
Links
Landscapes
- Polymerisation Methods In General (AREA)
Abstract
PURPOSE: To prepare a high quality polymer of methyl methacrylate containing only small amount of by-produced oligomer, in high productivity, by the bulk polymerization of methyl methacrylate monomer in a homogeneously agitating reactor at a specific temperature.
CONSTITUTION: Methyl methacrylate polymer is prepared by the bulk polymerization of methyl methacrylate monomer or a monomer mixture comprising ≥ 80% of methyl methacrylate and ≤ 20wt% of other copolymerizable vinyl monomer in a homogeneously agitating reactor wherein there is no gaseous phase in the reaction zone, and the ratio of the gaseous phase to the total volume of the reaction zone is maintained less than 30%, pref. less than 20%. The polymerization temperature is between 160°C and 200°C, pref. 165°C and 195°C. When the temperature at the initial stage of the polymerization is lower than 160°C, the viscosity of the polymerization system increases and the ultimate polymer content is suppressed, and the temperature exceeding 200°C, causes undesirable effects such as lowering of heat stability and discoloration of the resultant polymer.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14254477A JPS5474889A (en) | 1977-11-28 | 1977-11-28 | Preparation of methyl methacrylate polymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14254477A JPS5474889A (en) | 1977-11-28 | 1977-11-28 | Preparation of methyl methacrylate polymer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5474889A true JPS5474889A (en) | 1979-06-15 |
Family
ID=15317811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14254477A Pending JPS5474889A (en) | 1977-11-28 | 1977-11-28 | Preparation of methyl methacrylate polymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5474889A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888701A (en) * | 1981-11-24 | 1983-05-26 | Mitsubishi Rayon Co Ltd | Manufacture of optical fiber superior in light transmittance |
US4919598A (en) * | 1987-07-18 | 1990-04-24 | The Boc Group, Inc. | Vacuum pumps |
US5728793A (en) * | 1993-11-05 | 1998-03-17 | Sumitomo Chemical Company, Limited | Process for production of methacrylate polymers |
-
1977
- 1977-11-28 JP JP14254477A patent/JPS5474889A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5888701A (en) * | 1981-11-24 | 1983-05-26 | Mitsubishi Rayon Co Ltd | Manufacture of optical fiber superior in light transmittance |
JPH0225481B2 (en) * | 1981-11-24 | 1990-06-04 | Mitsubishi Rayon Co | |
US4919598A (en) * | 1987-07-18 | 1990-04-24 | The Boc Group, Inc. | Vacuum pumps |
US5728793A (en) * | 1993-11-05 | 1998-03-17 | Sumitomo Chemical Company, Limited | Process for production of methacrylate polymers |
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