Thermally stable pressure-sensitive adhesive tape and method for making same with plural silicone coatings

Claim 1

AN ARTICLE OF MANUFACTURE COMPRISING: A BACKING FORMED OF ALUMINUM FOIL; AN INTERMEDIARY COATING ADHERENTLY DISPOSED UPON SAID BACKING AND COMPRISING A HEAT-CURED REACTION PRODUCT OF A FORMULATION CONSISTING BY WEIGHT OF 100 PARTS OF AN ORGANO-SILICON POLYMERIC RESIN AND FROM 0.1 TO 5 PARTS OF AN ACCELERATOR SELECTED FROM THE GROUP CONSISTING OF BENZOYL PEROXIDE, 2,4-DICHLOROBENZOYL PEROXIDE, AND TERTIARY BUTYL PERBENZOATE; AND A PRESSURE-SENSITIVE ADHESIVE LAYER ADHERENTLY FORMED UPON SAID INTERMEDIARY COATING AND COMPRISING THE HEATCURED REACTION PRODUCT OF A FORMULATION CONSISTING BY WEIGHT OF 100 PARTS OF AN ORGANO-SILICON POLYMERIC RESIN, FROM 0.1 TO 4 PARTS OF AN ACCELERATOR SELECTED FROM THE GROUP CONSISTING OF BENZOYL PEROXIDE, 2,4-DICHLOROBENZOYL PEROXIDE AND TERTIARY BUTYL PERBENZOATE AND FROM 5 TO 20 PARTS OF A FILLER SELECTED FROM THE GROUP CONSISTING OF TITANIUM DIOXIDE, HYDRATED ALUMINA, ZINC OXIDE, SILICON OXIDE, ASBESTOS, AND CALCIUM CARBONATE, AND IN WHICH THE ORGANO-SILICON POLYMERIC RESIN OF EACH COATING IS COMPOSED OF (1) 40-75% BY WEIGHT, OF A BENZENE SOLUBLE RESIN COPOLYMER OF SIO2 UNITS AND R3SIO5 UNITS WHEREIN R IS A GROUP SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, PROPYL, VINYL AND PHENYL RADICALS, AT LEAST 90% OF THE TOTAL R RADICALS BEING ALIPHATIC, AND IN WHICH COPOLYMER RESIN THE RATIO OF R2SIO5 TO SIO2 UNITS IF FROM 0.6:1 TO 0.9:1 INCLUSIVE, AND (2) FROM 25-60% BY WEIGHT OF A HYDROXYL END BLOCKED DIORGANO-POLYSILOXANE FLUID OF FROM 5,000 TO LESS THAN 1,000,000 CS. VISCOSITY AT 25*C. IN WHICH POLYSILOXANE THE ORGANIC RADICALS ARE SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, VINYL AND PHENYL RADICALS, AT LEAST 75% OF THE TOTAL NUMBER OF RADICALS BEING ALIPHATIC.