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    Self-extinguishing thermoplastic compositions
    52.
    发明专利
    Self-extinguishing thermoplastic compositions 未知

    公开(公告)号：GB1146653A

    公开(公告)日：1969-03-26

    申请号：GB3055266

    申请日：1966-07-07

    Applicant: BASF AG

    Inventor： BURGER HEINZ ,  DAUMILLER GUENTHER ,  GROHMANN JOHANNES ,  KASTNING ERNST-GUENTHER ,  WEBER HEINZ ,  WILLERSINN HERBERT

    IPC: C08J9/00 ,  C08K5/00 ,  C08K5/02 ,  C08L25/04 ,  C08L65/00

    Abstract: 1,146,653. Self-extinguishing polymeric compositions. BADISCHE ANILIN- & SODAFABRIK A.G. 7 July, 1966 [9 July, 1965], No. 30552/66. Headings C3C and C3P. A self-extinguishing composition consists of (a) a normally solid thermoplastic polymer of at least 50% by wt. of styrene which may be substituted, and less than 50% of at least one other copolymerizable compound having the group having intimately incorporated therewith (b) an organic bromide, having a plurality of bromine atoms attached to carbon atoms and the bromine atoms constituting more than 40% of the bromide, in such an amount that the composition has a bromine content of 0À1-5%, and (c) 0À01-5% of (a) of a polymer which is prepared from (i) a compound of formula where R 1 , R 2 , R 4 and R 5 are H, halogen or a C 1-4 aliphatic hydrocarbon radical and at least two of the above Rs are where R 7 is a C 1-4 linear aliphatic hydrocarbon radical and R 8 is H or R 7 , and R 3 and R 6 are H or halogen atoms; or (ii) a mixture of the above compounds and a compound of the same formula where R 1 is where R 7 and R 8 are as before and the remaining Rs are H or halogen atoms. The (a) polymer may be polystyrene, a copolymer of styrene and acrylonitrile together with optionally polybutadiene, or a polymer obtained by polymerizing styrene in the presence of polybutadiene. Polymer (c) may be prepared by dehydropolymerization of p- or m-diisopropylbenzene with optionally isopropylbenzene, or 1,2,4-tri- or 1,2,4,5-tetra-isopropylbenzene. The bromide (b) may be hexabromocyclododecane or tris - (2,3 - dibromopropyl) - phosphate. The composition may be made by dissolving the three components in methylene chloride or by extruding the three components, with optionally kaolin; or by polymerizing styrene in the presence of an aq. mixture of polyvinylpyrrolidone, sodium pyrophosphate, benzoyl peroxide and the above (b) and (c) components. The composition may also contain a foaming agent, e.g. pentane or methyl chloride, and may be formed into a foamed sheet or strand.

    Production of propylene polymers with improved impact resistance
    53.
    发明专利
    Production of propylene polymers with improved impact resistance 未知

    公开(公告)号：GB1109863A

    公开(公告)日：1968-04-18

    申请号：GB3430465

    申请日：1965-08-11

    Applicant: BASF AG

    Inventor： STEDEFEDER JOACHIM ,  WEBER HEINZ ,  HANSEN KARL-FRIEDRICH ,  SCHNELL GEORG ,  SCHMIEDER KARL

    IPC: C08F297/06

    Abstract: Block copolymers are made by a process in which propylene, ethylene and a vinyl aromatic compound are polymerized in such a way that alternately one of the three monomers is present in an amount which is greater than the amount of each of the other two monomers so that polymers are obtained which contain 0.4-20% by weight of ethylene units and 0.4-20% by weight of vinyl aromatic units in addition to propylene units, the polymerization being carried out at temperatures of 0-150 DEG C., at pressures of 1-100 atmospheres and in the presence of catalysts which are mixtures of organometallic compounds of metals of Groups I, II and III and compounds of transition metals of Groups IVa to VIa of the Mendeleef Periodic Table. Vinyl aromatic compounds specified are styrene, vinyl toluenes and chlorostyrenes. The examples describe making block copolymers from propylene, ethylene and styrene, polymerization being carried out with the catalyst mixture either in light naphtha or in finely-divided polypropylene, the catalysts being formed from titanium trichloride and aluminium diethyl chloride. In certain of the described processes polymerization is carried out in the presence of hydrogen, triphenylbutyl phosphonium bromide or triphenylphosphine oxide as a regulator.

    55.
    发明专利
    未知

    公开(公告)号：FI67873C

    公开(公告)日：1985-06-10

    申请号：FI810900

    申请日：1981-03-24

    Applicant: BASF AG

    Inventor： MAHNKE HARALD ,  KREIBIEHL GUENTER ,  WEBER HEINZ ,  WOERNER FRANK PETER

    IPC: C08J9/04 ,  B29C44/34 ,  C08J3/28 ,  C08J9/12 ,  C08J9/14 ,  C08L61/28

    Abstract: A process for the manufacture of a resilient foam based on a melamine-formaldehyde condensate, wherein an aqueous or alcoholic solution or dispersion containing a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a hardener is foamed by ultra-high-frequency irradiation and the foam is hardened by crosslinking the precondensate. The foam may be employed for heat and sound insulation, and as a packaging material.

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