THERMOSETTING POLYESTER AND POLYESTER-IMIDE RESIN FOR ELECTRICAL INSULATION

• US 3,646,374 A
• Filed: 03/20/1970
• Issued: 02/29/1972
• Est. Priority Date: 03/20/1970
• Status: Expired due to Term

• Current Assignee: Edmund J. Zalewski, Julian E. Newell Jr, Manuel A. Jordan
• Original Assignee: Edmund J. Zalewski, Julian E. Newell Jr, Manuel A. Jordan
• Inventors: Jordan, Manuel A., Zalewski, Edmund J., Newell, Julian E. Jr.
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): Skudy, R.
• Application Number:
  US05/021,352
• Time in Patent Office: 711 Days
• Field of Search: 310/45,215,216,43,214 117/218,128.4,232,230,94,132
• US Class Current: 310/45
• CPC Class Codes: H01B 3/306 Polyimides or polyesterimides
• CPC Class Codes: H01B 3/42 polyesters; polyethers; polyacetals
• CPC Class Codes: H02K 3/30 Windings characterised by the insulating material
• CPC Class Codes: H02K 3/325 for windings on salient poles, such as claw-shaped poles
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation

Abstract

Improved thermosetting resins for coating and electrically insulating core members of dynamoelectric machine are disclosed. The resins include polyester and polyester-polyimide compositions derived from an alcohol component including tris (2-hydroxyethyl) isocyanurate.

Claims

2. A core member as in claim 1 where the thermosetting resin contains from 43 to 47 percent fillers and pigments based on the weight of resin comprising tris (2-hydroxyethyl) isocyanurate, fillers and pigments.

3. A core member as in claim 1 in the form of a stator.

4. A core member as in claim 1 in the form of a rotatable armature.

5. A core member as in claim 1 having in addition wire windings in the winding slots which are coated with the same thermosetting resin used to coat the core member.