US3841959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating tape for the manufacture of an insulating jacket for electric conductors impregnated with a thermosetting epoxy resin-acid anhydride curing mixture
Abstract 1. AN IMPROVEMENT IN AN INSULATING TAPE FOR THE MANUFACTURE OF AN INSULATING JACKET, SAID INSULATING TAPE BEING ADAPTED FOR USE ON THE WINDING CONDUCTORS AND COILS OF ELECTRIC MACHINES WHERE SAID INSULATING TAPE IS WOUND ON SAID WINDING CONDUCTORS AND COILS AND THEN IMPREGNATED WITH A THERMOSETTING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID INSULATING TAPE COMPRISING: (A) A FLEXIBLE SUBSTRATE; (B) AN AREAL, INORGANIC MATERIAL OF HIGH DIELECTRIC STRENGTH APPLIED TO SAID SUBSTRATE; (C) A BINDER WHICH CEMENTS SAID AREAL, INORGANIC MATERIAL TO SAID SUBSTRATE; (D) AN ACCELERATOR IN MIXTURE WITH SAID BINDER, SAID ACCELERATOR ACTING TO STIMULATE THE CURING REACTION OF THE IMPREGNATING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID BINDER-ACCELERATOR MIXTURE FORMING A SELFCURING SYSTEM AT THE CURING TEMPERATURE OF THE IMPREGNATING RESIN, USING CYCLOALIPHATIC EPOXY RESINS WITH AN EPOXY-EQUIVALENT WEIGHT OF UNDER 180, IN WHICH THE EPOXY GROUPS BEEN PRODUCED THROUGH OXYGEN ATTACHMENT AT DOUBLE BONDS IN THE RING, SAID BINDER-ACCELERATOR MIXTURE ADDITIONALLY COMPRIS: (E) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, IN WHICH THE SECONDARY NITROGEN ATOM IS A MEMBER OF A HYDROGENATED RING, WITH THE MOLAR RATIO OF 1:1; AND (F) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES NOT SUBSTITUTED IN THE 1-POSITION, WITH A MOLAR RATIO OF 1:1, WHEREIN SAID BINDER-ACCELERATOR MIXTURE COMPRISES ABOUT 60 TO 80% BY WEIGHT OF SAID CYCLOALIPHATIC EPOXY RESIN, ABOUT 19 TO 39% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, AND ABOUT 1 TO 15% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES.
AN IMPROVEMENT IN AN INSULATING TAPE FOR THE MANUFACTURE OF AN INSULATING JACKET, SAID INSULATING TAPE BEING ADAPTED FOR USE ON THE WINDING CONDUCTORS AND COILS OF ELECTRIC MACHINES WHERE SAID INSULATING TAPE IS WOUND ON SAID WINDING CONDUCTORS AND COILS AND THEN IMPREGNATED WITH A THERMOSETTING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID INSULATING TAPE COMPRISING: (A) A FLEXIBLE SUBSTRATE; (B) AN AREAL, INORGANIC MATERIAL OF HIGH DIELECTRIC STRENGTH APPLIED TO SAID SUBSTRATE; (C) A BINDER WHICH CEMENTS SAID AREAL, INORGANIC MATERIAL TO SAID SUBSTRATE; (D) AN ACCELERATOR IN MIXTURE WITH SAID BINDER, SAID ACCELERATOR ACTING TO STIMULATE THE CURING REACTION OF THE IMPREGNATING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID BINDER-ACCELERATOR MIXTURE FORMING A SELFCURING SYSTEM AT THE CURING TEMPERATURE OF THE IMPREGNATING RESIN, USING CYCLOALIPHATIC EPOXY RESINS WITH AN EPOXY-EQUIVALENT WEIGHT OF UNDER 180, IN WHICH THE EPOXY GROUPS BEEN PRODUCED THROUGH OXYGEN ATTACHMENT AT DOUBLE BONDS IN THE RING, SAID BINDER-ACCELERATOR MIXTURE ADDITIONALLY COMPRIS: (E) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, IN WHICH THE SECONDARY NITROGEN ATOM IS A MEMBER OF A HYDROGENATED RING, WITH THE MOLAR RATIO OF 1:1; AND (F) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES NOT SUBSTITUTED IN THE 1-POSITION, WITH A MOLAR RATIO OF 1:1, WHEREIN SAID BINDER-ACCELERATOR MIXTURE COMPRISES ABOUT 60 TO 80% BY WEIGHT OF SAID CYCLOALIPHATIC EPOXY RESIN, ABOUT 19 TO 39% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, AND ABOUT 1 TO 15% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES.
Claim 2
Dependent Claim
246 words
AN IMPROVEMENT IN AN INSULATING TAPE FOR THE MANUFACTURE OF AN INSULATING JACKET, SAID INSULATING TAPE BEING ADAPTED FOR USE ON THE WINDING CONDUCTORS AND COILS OF ELECTRIC MACHINES WHERE SAID INSULATING TAPE IS WOUND ON SAID WINDING CONDUCTORS AND COILS AND THEN IMPREGNATED WITH A THERMOSETTING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID INSULATING TAPE COMPRISING: (A) A FLEXIBLE SUBSTRATE; (B) AN AREAL, INORGANIC MATERIAL OF HIGH DIELECTRIC STRENGTH APPLIED TO SAID SUBSTRATE; (C) A BINDER WHICH CEMENTS SAID AREAL, INORGANIC MATERIAL TO SAID SUBSTRATE; (D) AN ACCELERATOR IN MIXTURE WITH SAID BINDER, SAID ACCELERATOR ACTING TO STIMULATE THE CURING REACTION OF THE IMPREGNATING EPOXY RESIN-ACID ANHYDRIDE MIXTURE, SAID BINDER-ACCELERATOR MIXTURE FORMING A SELFCURING SYSTEM AT THE CURING TEMPERATURE OF THE IMPREGNATING RESIN, USING CYCLOALIPHATIC EPOXY RESINS WITH AN EPOXY-EQUIVALENT WEIGHT OF UNDER 180, IN WHICH THE EPOXY GROUPS BEEN PRODUCED THROUGH OXYGEN ATTACHMENT AT DOUBLE BONDS IN THE RING, SAID BINDER-ACCELERATOR MIXTURE ADDITIONALLY COMPRIS: (E) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, IN WHICH THE SECONDARY NITROGEN ATOM IS A MEMBER OF A HYDROGENATED RING, WITH THE MOLAR RATIO OF 1:1; AND (F) ADDUCTS OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES NOT SUBSTITUTED IN THE 1-POSITION, WITH A MOLAR RATIO OF 1:1, WHEREIN SAID BINDER-ACCELERATOR MIXTURE COMPRISES ABOUT 60 TO 80% BY WEIGHT OF SAID CYCLOALIPHATIC EPOXY RESIN, ABOUT 19 TO 39% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND SECONDARY AMINES, AND ABOUT 1 TO 15% BY WEIGHT OF SAID ADDUCT OF VINYL CYCLOHEXENEDIOXIDE AND IMIDAZOLES.