http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1461665-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2323-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2323-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2323-02 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-0023 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L101-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F255-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L23-00 |
| filingDate | 1974-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1977-01-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1461665-A |
| titleOfInvention | Method of cross-linking polyethylene |
| abstract | 1461665 Cross-linked polyethylene and foams thereof DOW CHEMICAL CO 27 June 1974 28571/74 Headings C3P and C3C Polyethylene is cross-linked by treating a mixture of polyethylene and a cross-link promoter selected from trimethylolpropanetriacrylate, trimethylolpropanetrimethacrylate, pentaerythritol tetracrylate and pentaerythritoltetramethacrylate with high energy radiation until a dose of 0À1-1 megarad has been absorbed. The promoter is present preferably in an amount 0À1-10% by weight of the mixture and the ionization radiation may be electrons, protons, neutrons, deuterons, γ-rays, X-rays, alpha particles and #-particles from an atomic pile, a resonant transformer accelerator, a Van de Graaff electron generator, a Linac electron accelerator, a betatron, a synchrotron or a cyclotron. Foamed cross-linked polyethylene is produced by including a foaming agent (preferably between 0À1-20% based on the total weight of the mixture) and the polymer is cross-linked prior to foaming. The foaming agent may be a volatile liquid (dichlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane, perfluorocyclobutane) or a heatdecomposable compound (azodicarbonamide, ammonium carbonate, azobis(isobutyronitrile), hydrazodicarbonamide). The cellular product may be in the form of a film, sheet, fibre, tube or wire-coating. The example describes the formation of a cross-linked polyethylene foamed sheet from a mixture of low density polyethylene, and, based on the weight of the polymer, 15% azodicarbonamide, 5% zinc oxide (to lower the decomposition of the foaming agent), and 0À5% trimethylolpropane triacrylate. The polyethylene was cross-linked by treatment with ionizing radiation and then foamed in a bath of silicon oil after determination of the gel content of the cross-linked polymer. Table I gives the foam volumes of products treated with 0À1, 0À25, 0À5 and 1 megarad and, comparatively, with 0, 2 and 3 megarad. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0181637-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0181637-A2 |
| priorityDate | 1972-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.