Rubber compounding

{
  "publication_number": "US3900999A",
  "country": "US",
  "kind": "A",
  "title": "Rubber compounding",
  "abstract": "A vulcanizing agent for rubber is incorporated into a polymer which is substantially noncrosslinkable by the agent but which is fusible with rubber upon milling. The resulting polymeric mixture and a vulcanizable rubber are formed into strips which are joined together along the lengths thereof to form an elongated, twocomponent tape wherein the rubber vulcanizing agent is carried in the nonreactive polymer. Sections of the tape can be milled to produce a vulcanizable compound by blending the polymeric component with the rubber component, thus obviating any need for separate addition of a rubber vulcanizing agent. The tape can be wound on a reel and stored until the need for blending arises. Premature reaction of the vulcanizing agent with the rubber is prevented since it is bound within the noncrosslinkable polymer. In one highly useful application, the two-component tape is fed continuously to an extruder wherein blending of the components is effected, and whereby the resulting blend is continuously extruded as a self-curing sealant tape which is simultaneously applied to a structural joint requiring a seal.",
  "claims": [
    "1. A TWO-COMPONENT POLYMERIC TAPE WHICH COMPRISES AS A FIRST COMPONENT A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYISOBUTYLENES, ETHYLENE-PROYLENE COPOLYMERS, ETHYLENE-VINYL ACETATE COPOLYMERS AND BLENDS THEREOF, SAID POLYMER HAVING A RUBBER VULCANIZING AGENT INCORPORATED THEREIN AND BEING SUBSTANTIALLY NONCROSSLINKABLE BY SAID VULCANIZING AGENT, AND AS A SECOND COMPONENT A RUBBER VULCANIZABLE BY SAID VULCANIZING AGENT CONTAINED IN SAID POLYMER, EACH OF THE COMPONENTS BEING IN THE FORM OF SUBSTANTIALLY ELONGATED PIECES, THE TWO COMPONENT PIECES BEING JOINED TOGETHER ALONG THE LENGTHS THEREOF, SAID POLYMER BEING FUSIBLE WITH SAID SUBBER UPON MILLING SAID TAPE.",
    "2. THE RUBBER TAPE OF CLAIM 1 WHEREIN THE RUBBER OF SAID SECOND COMPONENT IS SELECTED FROM THE GROUP CONSISTING OF BUTYL RUBBERS, EPDM RUBBERS, POLYSULFIDE RUBBERS, POLYURETHANE SUBBERS, SILICONE RUBBERS, THERMOPLASTIC CRYLIC RUBBERS, AND COMPATIBLE BLENDS THEREOF.",
    "3. The rubber tape of claim 1 wherein said first component also contains a rubber compounding oil.",
    "4. The rubber tape of claim 1 wherein said first component also contains a rubber cure accelerator.",
    "5. The rubber tape of claim 1 wherein said first component also contains a rubber filler.",
    "6. The rubber tape of claim 1 wherein said second component also contains a rubber filler.",
    "7. The rubber tape of claim 1 wherein said second component also contains a rubber compounding oil.",
    "8. The rubber tape of claim 1 wherein the polymer of said first component is a polyisobutylene rubber.",
    "9. The rubber tape of claim 1 wherein the rubber of said second component is butyl rubber.",
    "10. METHOD OF PRODUCING A VULCANIZABLE POLYMER COMPOSITION WHICH COMPRISES MILLING A TWO-COMPONENT TAPE AS DEFINED IN CLAIM 1 AND THUS BLENDING SAID COMPONENTS THEREOF.",
    "11. Method of claim 10 wherein said tape is fed continuously into a screw-type extruder, said components are blended by the masticating action of the extruder screw, and the blend is continuously discharged from the extruder as a vulcanizable article of use.",
    "12. The method of claim 11 wherein the blend is discharged from the extruder in the form of a tape.",
    "13. IN A PROCESS FOR SEALING A STRUCTURAL JOINT BY FILLING THE JOINT WITH A RUBBER SEALING TAPE WHICH VULCANIZES IN SITU UPON EXPOSURE TO THE CONDITION OF USE, THE METHOD WHICH COMPRISES MILLING THE TWO- COMPONENT RUBBER TAPE DEFINED INCLAIM 1 AND THUS BLENDING THE FIRST AND SECOND COMPOENETS OF SAID RUBBER TAPE WITH EACH OTHER, EXTRUDING THE RESULTING BLEND AS A SEALANT TAPE, AND APPLYING SAID SEALANT TAPE TO THE STRUCTURAL JOINT TO BE SEALED.",
    "14. The method as defined in claim 13 wherein external heat is supplied to said components during the blending thereof and the resulting blend is extruded as a heated sealant tape.",
    "15. The method of claim 13 wherein said first and second rubber components are continuously blended while simultaneously extruding said sealant tape.",
    "16. The method of claim 15 wherein the sealant tape is simultaneously extruded and applied to said structural joint.",
    "17. THE METHOD OF PRODUCING A TWO COMPONENT TAPE WHICH COMPRISES: A. ONCORPORATING A RUBBER VULCANIZING AGENT INTO A POLYMER THAT IS SUBSTANTIALLY NONCROSSLINKABLE BY SAID AGENT, SAID POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYISOBUTYLENES, ETHYLENEPROPYLENE COPOLYMERS, ETHYLENE-VINYL ACETATE COPOLYMERS, AND BLENDS THEREOF, B. FORMING THE MIXTURE OF STEP (A) INTO AN ELONGATED PIECE, AND C. JOINING THE ELONGATED PIECE FROM STEP (B) TO AN ELONGATED PIECE OF VULCANIZABLE RUBBER CURABLE BY SAID VULCANIZING AGENT, THE UNION OF THE PIECES BEING ALONG THE LENGTHS THEREOF."
  ],
  "cpc": [
    "C08J 3/226",
    "C08J 2321/00",
    "C08J 2423/00",
    "C08J 3/241",
    "Y10T 156/11",
    "Y10T 428/31833",
    "Y10T 428/31837",
    "Y10T 428/31931"
  ],
  "assignees": [
    "CITIES SERVICE OIL CO"
  ],
  "filing_date": "1971-10-29",
  "publication_date": "1975-08-26",
  "grant_date": "1975-08-26",
  "priority_date": "1971-10-29",
  "application_number": "US-19399071-A",
  "family_id": "22715885",
  "citations": [
    "US3126306A",
    "US3454462A",
    "US3522831A",
    "US3617419A",
    "US3651176A",
    "US3653423A",
    "US3669828A",
    "US3674735A",
    "US3704196A",
    "US3708379A"
  ]
}