Continuous production of ethylene homopolymers

    公开(公告)号:US3702845A

    公开(公告)日:1972-11-14

    申请号:US3702845D

    申请日:1970-02-11

    Applicant: BASF AG

    CPC classification number: C08F10/00 C08F4/28

    Abstract: PRODUCTION OF ETHYLENE HOMOPOLYMERS HAVING A SPECIFIC DENSITY BY POLYMERIZATION OF ETHYLENE UNDER THE ACTION OF ORGANIC PEROXIDES AND OXYGEN AS FREE-RADICAL-GENERATING POLYMERIZATION INITIATORS AND OF POLYMERIZATION MODIFIERS AT ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE IN A TUBULAR REACTOR HAVING TWO SUCCESSIVE REACTION ZONES, A MIXTURE OF ETHYLENE, POLYMERIZATION INITIATOR AND POLYMERIZATION MODIFIER BEING INTRODUCED CONTINUOUSLY AT THE BEGINNING OF EACH REACTION ZONE. OXYGEN AS POLYMERIZATION INITIATOR AND A MIXTURE OF A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW C5 VALUE AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH C5 VALUE ARE USED IN THE FIRST REACTION ZONE, AND AN ORGANIC PEROZIDE HAVING A SPECIFIC HALF VALUE TEMPERATURE AS POLYMERIZATION INITIATOR AND A MIXTURE OF A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW C5 VALUE AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH C5 VALUE ARE EMPLOYED IN THE SECOND REACTION ZONE. THE ETHYLENE HOMOPOLYMERS OBTAINED HAVE A WIDE MOLECULAR WEIGHT DISTRIBUTION AND ARE PRACTICALLY DEVOID OF VERY HIGH MOLECULAR WEIGHT CONSTITUENTS.

    Metallizing expanded plastics articles
    119.
    发明授权
    Metallizing expanded plastics articles 失效
    金属化膨胀塑料制品

    公开(公告)号:US3698929A

    公开(公告)日:1972-10-17

    申请号:US3698929D

    申请日:1969-06-18

    Applicant: BASF AG

    CPC classification number: C23C18/2086 C23C18/38

    Abstract: A METHOD OF METALLIZING THE SURFACE OF EXPANDED PLASTICS ARTICLES BY APPLYING A LAYER OF A COATING COMPOSITION CONTAINING FINELY DISPERSED IRON PARTICLES AND ELECTROLESS DEPOSITION OF COPPER BY TREATING THE SAID LAYER WITH AN ACID AQUEOUS COPPER SALT SOLUTION, A LAYER OF AN AQUEOUS SOLUTION OR DISPERSION OF AN ORGANIC POLYMER CONTAINING HETEROATOMS BEING APPLIED AND DRIED PRIOR TO APPLICATION OF THE IRON-CONTAINING COATING.

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