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    Polymerisation of ethylene under high pressure
    3.
    发明专利
    Polymerisation of ethylene under high pressure 未知

    公开(公告)号：GB1047957A

    公开(公告)日：1966-11-09

    申请号：GB3322063

    申请日：1963-08-22

    Applicant: BASF AG

    Inventor： KINKEL KLAUS ,  PFANNMUELLER HELMUT ,  RODER PETER ,  ROTZOLL RUDI-HEINZ ,  TITTEL MANFRED ,  URBAN FREIDRICH ,  ZACHER WIELAND

    IPC: C08F10/00 ,  C08F110/02

    Abstract: Polyethylene of density 0.91 to 0.94 is produced by polymerization of ethylene at 150 DEG to 300 DEG C. and 1500 to 3000 atmospheres in a tubular reactor with oxygen as catalyst and in the presence of a chain transfer agent, wherein the reaction mixture is heated to 168 DEG to 174 DEG C. in the reactor and then heat is immediately extracted externally through the reactor wall by means of a coolant whose temperature does not exceed 170 DEG C., the temperature of the reaction mixture not falling below 168 DEG C. In examples, the cooling medium used is water under pressure and at 160-170 DEG C. The transfer agent may be hydrogen, a hydrocarbon, an alcohol, an ester, an acid anhydride, an aldehyde or a ketone. Sheet of good transparency may be obtained.

    Molding materials based on bitumen and ethylene copolymers
    4.
    发明专利
    Molding materials based on bitumen and ethylene copolymers 未知

    公开(公告)号：GB1042303A

    公开(公告)日：1966-09-14

    申请号：GB15564

    申请日：1964-01-02

    Applicant: BASF AG

    Inventor： TRIESCHMANN HANS GEORG ,  UNTERSTENHOEFER LEO ,  RODER PETER ,  ZACHER WIELAND ,  GUNDEL WOLFGANG

    IPC: C08L23/08 ,  C08L31/04 ,  C08L33/06 ,  C08L95/00 ,  C09D133/06 ,  C09K3/10

    Abstract: Moulding material contains 30-95% bitumen and 5-70% of an ethylene copolymer. The bitumen has penetration 10-210 and may have R and B softening point of 37-72 DEG C., and may be asphaltic bitumen, petrolene, malthene, asphaltene or pyrobitumen, natural or obtained by petroleum distillation. The ethylene copolymer is of 30-97% ethylene and 70-3% vinyl ester or esters and/or copolymerizable acrylic and/or methacrylic compounds. Such compounds may be acrylic or methacrylic acids and their esters, and amides and nitriles which may bear substituents on the N atom. Many examples are given. Other ethylenically unsaturated compounds exemplified may additionally be present in the copolymer. The copolymers used have melt indices of 0.1-100. The moulding material may be applied molten to surfaces which are preferably preheated and which may be primed, e.g. with bitumen emulsion. Fillers, e.g. wood flour, carbon black, diatomaceous earth, kaolin, quartz powder, stone chips, sand, glass fibres, mineral wool, rubber powder, wool felt, jute, or synthetic fibres, may be present. A composition may contain, e.g. 5-70% by weight, with reference to bitumen and copolymer, of filler of particle diameter 0.01-0.09 mm.; or there may be present, with reference to the total weight of the composition, e.g. 4-10% bitumen, 2-10% copolymer, 6-20% mineral filler of particle diameter 0.01-0.09 mm., and 60-88% of mineral filler of particle diameter of 0.09-20 mm.

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