GB1185706A - A method of Coating Electrical Sheets - Google Patents

A method of Coating Electrical Sheets

Info

Publication number
GB1185706A
GB1185706A GB1181467A GB1181467A GB1185706A GB 1185706 A GB1185706 A GB 1185706A GB 1181467 A GB1181467 A GB 1181467A GB 1181467 A GB1181467 A GB 1181467A GB 1185706 A GB1185706 A GB 1185706A
Authority
GB
United Kingdom
Prior art keywords
lignin
compound
acid
composition
polyethylene glycol
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.)
Expired
Application number
GB1181467A
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.)
Yawata Iron and Steel Co Ltd
Original Assignee
Yawata Iron and Steel 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 Yawata Iron and Steel Co Ltd filed Critical Yawata Iron and Steel Co Ltd
Publication of GB1185706A publication Critical patent/GB1185706A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • H01F1/14783—Fe-Si based alloys in the form of sheets with insulating coating

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Paints Or Removers (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

1,185,706. Coatings. YAWATA IRON & STEEL CO. Ltd. 14 March, 1967 [18 March, 1966], No. 11814/67. Heading B2K. [Also in Divisions C7 and H1] An electrically insulating coating is formed on an electric steel sheet by applying an aqueous composition containing a phosphorus compound and a lignin derivative and heating at 20-500‹C for 1-120 seconds. Sulphurous, nitric or hydrochloric acid derivatives of lignin, or lignin sulphonates of ammonium, alkali alkaline earth, Group IB or Group IIB metals may be used in an amount 1-90% by wt of the composition. The phosphorous compound may be ortho-, pyro- or polyphosphoric acid, phosphorous or hypophosphorous acid, or an orthophosphate, preferably in an amount 0.5- 15% by wt. The composition may also contain chromic acid, or a water-soluble chromium compound, or boric acid or a watersoluble boron compound. Optional additives also include an alcohol, polyalcohol or formalin solvent; ethylene or polyethylene glycol, glycerine, polyvinyl alcohol, methyl ethyl cellulose, starch, polyacrylic acid or an amino resin in a ratio .1-1:1 by wt. of the lignin compound, to improve adhesion; oxides of Mg, Ti, V, Mo, Mn, Fe, Ni, Cu, Zn, Al, Pb, Sb, Si, or mica, talc or bentonite to increase heat and electrical resistance; and a polyethylene glycol lauryl ether as surfactant. The pH may be controlled by addition of CH 3 COOH, HC1, HNO 3 , HN0 2 , H 2 SO 4 , HC10, HClO 4 , or NH 3 or an alkali or alkaline earth metal compound. The organic components should constitute at least 30% by wt. of the dried coating. Compositions exemplified are as follows:-(1) (Comparative) Ca lignin sulphonate, H 2 O; (2) Ca lignin sulphonate, H 3 PO 4 , H 2 O; (3) lignin sulphonic acid, H 3 PO 4 , CrO 3 , H 2 O; (4) NH 4 lignin sulphonate, Zn(H 2 PO 4 ) 2 , polyvinyl alcohol, H 2 O; (5) Ca lignin sulphonate, H 3 PO 4 , polyvinyl alcohol, polyethylene glycol lauryl ether, H 2 O. The composition may be applied in an amount 0.5-10 g/m<SP>2</SP> (dried weight) by rolling or spraying.
GB1181467A 1966-03-18 1967-03-14 A method of Coating Electrical Sheets Expired GB1185706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1690366 1966-03-18

Publications (1)

Publication Number Publication Date
GB1185706A true GB1185706A (en) 1970-03-25

Family

ID=11929087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1181467A Expired GB1185706A (en) 1966-03-18 1967-03-14 A method of Coating Electrical Sheets

Country Status (3)

Country Link
DE (1) DE1644744C3 (en)
GB (1) GB1185706A (en)
SE (1) SE345544B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015054736A1 (en) * 2013-10-18 2015-04-23 Queensland University Of Technology Lignin-based waterproof coating
CN116287623A (en) * 2023-03-06 2023-06-23 首钢智新迁安电磁材料有限公司 Oriented silicon steel and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015054736A1 (en) * 2013-10-18 2015-04-23 Queensland University Of Technology Lignin-based waterproof coating
CN105899628A (en) * 2013-10-18 2016-08-24 昆士兰技术大学 Lignin-based waterproof coating
CN105899628B (en) * 2013-10-18 2020-10-27 昆士兰技术大学 Lignin-based water-resistant coating
CN116287623A (en) * 2023-03-06 2023-06-23 首钢智新迁安电磁材料有限公司 Oriented silicon steel and preparation method thereof
CN116287623B (en) * 2023-03-06 2024-01-02 首钢智新迁安电磁材料有限公司 Oriented silicon steel and preparation method thereof

Also Published As

Publication number Publication date
SE345544B (en) 1972-05-29
DE1644744A1 (en) 1970-12-17
DE1644744B2 (en) 1975-02-13
DE1644744C3 (en) 1975-09-18

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees