Chromium-free insulation coating material for non-oriented silicon steel

Patent metadata

Field	Value
Publication number	US-9334405-B2
Application number	US-201113818258-A
Country	US
Kind code	B2
Filing date	Apr 13, 2011
Priority date	Sep 29, 2010
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

The present invention refers to a chromium-free insulation coating material for non-oriented silicon steel, comprising, in parts by weight, the following components: metal dihydrogen phosphate salt of 100 parts, epoxy resin of 10˜60 parts, naphthenate drier or isooctanoate metal salt drier of 0.001˜10 parts, organic solvent of 0.001˜100 parts and pure water of 60˜2000 parts. The metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 ; the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion. Chromium-free insulation coating material of the present invention, after being coated on non-oriented silicon steel, renders highly transparent appearance, and has excellent insulativity, corrosion resistance, adhesiveness, weldability and manufacturability, so as to eliminate defects of the existing chromium-free coating, such as sticky and un-wear-resistant and to meet environment protection requirements.

First claim

What is claimed is:

1. A chromium-free coating composition comprising, in parts by weight:

metal dihydrogen phosphate salt
100
parts;

epoxy resin
10~60
parts;

isooctanoate metal salt drier
0.001~10
parts;

organic solvent
0.001~100
parts;

pure water
60~2000
parts;

characterized in that the isooctanoate metal salt drier is potassium, manganese, sodium, nickel, copper, cerium, zinc, zirconium or calcium isooctanoate salt.

2. The chromium-free coating composition as defined in claim 1 , characterized in that said metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 2 or Zn(H 2 PO 4 ) 2 .

3. The chromium-free coating composition as defined in claim 2 , characterized in that in the Al(H 2 PO 4 ) 3 , molar ratio of Al 2 O 3 to H 3 PO 4 is 0.14˜0.20:1.

4. The chromium-free coating composition as defined in claim 2 , characterized in that in the Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 , molar ratio of MgO, CaO, or ZnO to H 3 PO 4 is 0.40˜0.60:1.

5. The chromium-free coating composition as defined in claim 1 , characterized in that the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion.

6. The chromium-free coating composition as defined in claim 1 , characterized in that the organic solvent is glycol or glycerol.

7. A chromium-free coating composition comprising, in parts by weight:

metal dihydrogen phosphate salt
100
parts;

epoxy resin
10~60
parts;

naphthenate drier or isooctanoate
5~8
parts;

metal salt drier

organic solvent
0.001~100
parts;

pure water
60~2000
parts.

8. The chromium-free coating composition as defined in claim 7 , characterized in that said metal dihydrogen phosphate salt is Al(H 2 PO 4 ) 3 , Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 .

9. The chromium-free coating composition as defined in claim 8 , characterized in that in the Al(H 2 PO 4 ) 3 , molar ratio of Al 2 O 3 to H 3 PO 4 is 0.14˜0.20:1.

10. The chromium-free coating composition as defined in claim 8 , characterized in that in the Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 , molar ratio of MgO, CaO, or ZnO to H 3 PO 4 is 0.40˜0.60:1.

11. The chromium-free coating composition as defined in claim 7 , characterized in that the epoxy resin is water-soluble epoxy resin or epoxy resin emulsion.

12. The chromium-free coating composition as defined in claim 7 , the coating material comprising naphthenate drier, characterized in that the naphthenate drier is cobalt, manganese, iron, copper, cerium, zinc, calcium, potassium, barium or nickel naphthenate.

13. The chromium-free coating composition as defined in claim 7 , the coating material comprising isooctanoate metal salt drier, characterized in that the isooctanoate metal salt drier is potassium, manganese, sodium, nickel, copper, cerium, zinc, zirconium or calcium isooctanoate salt.

14. The chromium-free coating composition as defined in claim 7 , characterized in that the organic solvent is glycol or glycerol.

Assignees

• Xu Yunpeng
• Yang Yongjie
• Li Dengfeng
• Ji Yaming
• Zhao Zipeng
• Chen Lingyun
• Chen Xiao
• Huang Jie
• Baoshan Iron & Steel

Inventors

• Xu Yunpeng
• Yang Yongjie
• Li Dengfeng
• Ji Yaming
• Zhao Zipeng
• Chen Lingyun
• Chen Xiao
• Huang Jie

Classifications

• H01B3/40

  epoxy resins · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D5/084

  Inorganic compounds · CPC title

• C09D7/1216

  Chemistry & Metallurgy · mapped topic

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title