JPS57128712A - Preparation of resin solution for magnetic coating material - Google Patents

Preparation of resin solution for magnetic coating material

Info

Publication number
JPS57128712A
JPS57128712A JP1532181A JP1532181A JPS57128712A JP S57128712 A JPS57128712 A JP S57128712A JP 1532181 A JP1532181 A JP 1532181A JP 1532181 A JP1532181 A JP 1532181A JP S57128712 A JPS57128712 A JP S57128712A
Authority
JP
Japan
Prior art keywords
carboxylic acid
unsaturated carboxylic
anhydride
vinyl
solution
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
JP1532181A
Other languages
Japanese (ja)
Other versions
JPS643215B2 (en
Inventor
Shigeto Miyoshi
Kanehisa Hanabusa
Toshio Kagami
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.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
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 Denki Kagaku Kogyo KK filed Critical Denki Kagaku Kogyo KK
Priority to JP1532181A priority Critical patent/JPS57128712A/en
Publication of JPS57128712A publication Critical patent/JPS57128712A/en
Publication of JPS643215B2 publication Critical patent/JPS643215B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the titled solution having a long pot life and good dispersibility of magnetic powder, by adding a vinyl carboxylate and an unsaturated carboxylic acid (anhydride) in portions to the solution polymerization of vinyl chloride with the vinyl carboxylate ester and the unsaturated carboxylic acid (anhydride) in a specific proportion.
CONSTITUTION: A polymerizer is charged with (A) vinyl chloride and (B) a vinyl carboxylate e.g. vinyl acetate, and the resultant mixture is then polymerized in the presence of an ordinary oil-soluble initiator under heating and pressure. (C) An unsaturated carboxylic acid, e.g. maleic acid, and (D) an unsaturated carboxylic acid anhydride, e.g. maleic anhydride, are partially added in the initial stage of the polymerization or before the initiation, and the rest are added up to the conversion of 60% in portions to give the aimed solution. The mixing ratios are as follows: (A):(A+B)=(50W80):100, (D):(C+D)=(60W90):100(wt%), (C+D):(A+B)=(1W5):100(pts.wt.). The average polymerization degree is 100W 400 (preferably 200W400).
COPYRIGHT: (C)1982,JPO&Japio
JP1532181A 1981-02-04 1981-02-04 Preparation of resin solution for magnetic coating material Granted JPS57128712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1532181A JPS57128712A (en) 1981-02-04 1981-02-04 Preparation of resin solution for magnetic coating material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1532181A JPS57128712A (en) 1981-02-04 1981-02-04 Preparation of resin solution for magnetic coating material

Publications (2)

Publication Number Publication Date
JPS57128712A true JPS57128712A (en) 1982-08-10
JPS643215B2 JPS643215B2 (en) 1989-01-20

Family

ID=11885502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1532181A Granted JPS57128712A (en) 1981-02-04 1981-02-04 Preparation of resin solution for magnetic coating material

Country Status (1)

Country Link
JP (1) JPS57128712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60206875A (en) * 1984-03-30 1985-10-18 Toyo Soda Mfg Co Ltd Synthetic resin paint composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955059A (en) * 1989-03-29 1990-09-04 Motorola, Inc. Speaker power matching method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60206875A (en) * 1984-03-30 1985-10-18 Toyo Soda Mfg Co Ltd Synthetic resin paint composition

Also Published As

Publication number Publication date
JPS643215B2 (en) 1989-01-20

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