JPS5686931A - Ultrafine resin powder and its preparation - Google Patents
Ultrafine resin powder and its preparationInfo
- Publication number
- JPS5686931A JPS5686931A JP16543979A JP16543979A JPS5686931A JP S5686931 A JPS5686931 A JP S5686931A JP 16543979 A JP16543979 A JP 16543979A JP 16543979 A JP16543979 A JP 16543979A JP S5686931 A JPS5686931 A JP S5686931A
- Authority
- JP
- Japan
- Prior art keywords
- polymerization degree
- powder
- resin powder
- ultrafine resin
- particle size
- 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
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To obtain an ultrafine resin powder of a polyester, having a high polymerization degree, and suitable for a powder coating material, by polymerizing a specific polyester of low polymerization degree in the solid phase.
CONSTITUTION: A low-polymer copolyester having a polymerization degree of preferably 4W60, and a reduced viscosity of 0.1W0.4 without the fiber-forming ability, and consisting of preferably 60wt% ethylene terephthalate units in the repeating units is pulverized in a pulverizer, e.g. a ball mill, hammer mill or pneumatic pulverizer, into a powder having a particle size of 70μ or less to pass through a 200-mesh screen. The powder is then polymerized in the solid phase at a temperature preferably 5W100°C lower than the melting point of the polymer in vacuo or in a heated inert gaseous atmosphere to give an ultrafine resin powder having a maximum particle size ≤70μ, an average polymerization degree ≥60 and a reduced viscosity ≥0.4.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16543979A JPS5686931A (en) | 1979-12-19 | 1979-12-19 | Ultrafine resin powder and its preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16543979A JPS5686931A (en) | 1979-12-19 | 1979-12-19 | Ultrafine resin powder and its preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5686931A true JPS5686931A (en) | 1981-07-15 |
Family
ID=15812445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16543979A Pending JPS5686931A (en) | 1979-12-19 | 1979-12-19 | Ultrafine resin powder and its preparation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5686931A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6155115A (en) * | 1984-08-27 | 1986-03-19 | Nippon Ester Co Ltd | Production of polyarylate |
EP0182351A2 (en) * | 1984-11-20 | 1986-05-28 | Mitsubishi Rayon Co., Ltd. | Process for the production of polyester |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828048A (en) * | 1971-08-14 | 1973-04-13 | ||
JPS495453A (en) * | 1972-05-09 | 1974-01-18 | ||
JPS54117596A (en) * | 1978-02-13 | 1979-09-12 | Goodyear Tire & Rubber | Production of high molecular weight polyester |
-
1979
- 1979-12-19 JP JP16543979A patent/JPS5686931A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828048A (en) * | 1971-08-14 | 1973-04-13 | ||
JPS495453A (en) * | 1972-05-09 | 1974-01-18 | ||
JPS54117596A (en) * | 1978-02-13 | 1979-09-12 | Goodyear Tire & Rubber | Production of high molecular weight polyester |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6155115A (en) * | 1984-08-27 | 1986-03-19 | Nippon Ester Co Ltd | Production of polyarylate |
EP0182351A2 (en) * | 1984-11-20 | 1986-05-28 | Mitsubishi Rayon Co., Ltd. | Process for the production of polyester |
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