Storage-stable, very quickly hardenable, one-component sealant based on mercapto-terminated polymers

{
  "publication_number": "US4100148A",
  "country": "US",
  "kind": "A",
  "title": "Storage-stable, very quickly hardenable, one-component sealant based on mercapto-terminated polymers",
  "abstract": "A storage-stable, very quickly hardenable, one-component sealant comprises a mercapto-terminated liquid polymer having uniformly distributed therein a curing agent for the polymer, wherein the curing agent is in a micro-encapsulated state.",
  "claims": [
    "1. A storage-stable sealant composition capable of quickly hardening, said composition comprising at least one liquid monomer, oligomer or polymer having terminal mercapto groups; and at least one oxidation agent for curing said liquid monomer, oligomer or polymer; wherein said oxidation agent is substantially uniformly distributed throughout said composition in the form of encapsulated small particles of a paste made from said oxidation agent and a plasticizer which is compatible with said liquid monomer, oligomer or polymer wrapped in a gelatin encapsulating material, the ratio of paste to gelatin being 12:1.",
    "2. Composition according to claim 1 wherein said particles of said oxidation agent have a size within the range of about 100 to about 2000 μ.",
    "3. Composition according to claim 1 wherein said particles of said oxidation agent have a size within the range of about 600 to about 1000 μ.",
    "4. Composition according to claim 1 wherein said liquid polymer is a polysulfide polymer or a thioether polymer.",
    "5. Composition according to claim 1 wherein each particle is in the form of a capsule having a wall which is insoluble in said liquid monomer, oligomer or polymer.",
    "6. Composition according to claim 1 wherein said oxidation agent is present in about 10 to about 20 weight percent stoichiometric excess relative to the SH-content of said liquid monomer, oligomer or polymer.",
    "7. Composition according to claim 1 wherein said oxidation agent is lead dioxide.",
    "8. Composition according to claim 1 wherein each of said particles comprises lead dioxide and plasticizer.",
    "9. Composition according to claim 1 wherein said oxidation agent is lead dioxide or manganese dioxide."
  ],
  "cpc": [
    "C08G 75/14"
  ],
  "assignees": [
    "RUETGERSWERKE AG"
  ],
  "filing_date": "1976-05-04",
  "publication_date": "1978-07-11",
  "grant_date": "1978-07-11",
  "priority_date": "1975-06-13",
  "application_number": "US-68313676-A",
  "family_id": "5949092",
  "citations": [
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  ]
}