JPS5686931A - Ultrafine resin powder and its preparation - Google Patents

Ultrafine resin powder and its preparation

Info

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
Application number
JP16543979A
Other languages
Japanese (ja)
Inventor
Fumio Himematsu
Shinichi Aso
Taiichi Murao
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP16543979A priority Critical patent/JPS5686931A/en
Publication of JPS5686931A publication Critical patent/JPS5686931A/en
Pending legal-status Critical Current

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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
JP16543979A 1979-12-19 1979-12-19 Ultrafine resin powder and its preparation Pending JPS5686931A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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