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    Moulding Compositions for the Production of Foam Articles.
    22.
    发明专利
    Moulding Compositions for the Production of Foam Articles. 未知

    公开(公告)号：GB1163730A

    公开(公告)日：1969-09-10

    申请号：GB192867

    申请日：1967-01-13

    Applicant: BASF AG

    Inventor： ZUERN LUDWIG ,  STAHNECKER ERHARD ,  GROHMANN JOHANNES ,  BUCHHOLZ KARL

    IPC: C08J9/00

    Abstract: 1,163,730. Moulding compositions. BADISCHE ANILIN- & SODA-FABRIK A.G. 13 Jan., 1967 [15 Jan., 1966], No. 1928/67. Headings C3C and C3P. Particulate moulding compositions consisting of a mixture of a styrene polymer and an expanding agent, wherein the particles contain 0.001-0.6% by weight of the styrene polymer, in homogeneous distribution, of a brominated polymer of a 1,3-diene may be made by polymerizing monomeric styrene in a heating process, with or without other monomers, in the presence of an expanding agent and the brominated polymers and then cooling, or polymerizing styrene in aqueous suspension and adding the bromine compounds, with or without the expanding agent during polymerization at a point when the particles no longer divide. Exemplified styrene polymers are polystyrene and styrene copolymers which contain at least 50% by weight of styrene units. The copolymerization units include 2, methylstyrene, acrylonitrile, methacrylonitrile, esters of acrylic or methacrylic acids and alcohols having 1-8 C, esters of fumaric acid and alcohols having 1-8 C, vinyl pyridine, N-vinyl compounds such as N-vinyl carbazole, butadiene or small amounts of divinylbenzene. Examples of suitable brominated polymers of 1,3-dienes are the bromination products of butadiene polymers, isoprene polymers and chloroprene polymers. Specific examples of suitable brominated polymers are 1,2,5,6 - tetrabromocyclododecane, brominated cyclo-octadiene - (1,5), 1,2,5,6,9,10- hexabromocyclododecane, brominated 1-vinylcyclohexene-(3) or brominated polybutadiene which has a linear structure. Bromination is carried out using elemental bromine, the reaction being carried out in solution or dispersion. Suitable solvents are n-butanol, CS 2 , glacial acetic acid or CCl 4 .

    Production of particulate expandable styrene polymers
    23.
    发明专利
    Production of particulate expandable styrene polymers 未知

    公开(公告)号：GB1126913A

    公开(公告)日：1968-09-11

    申请号：GB181966

    申请日：1966-01-14

    Applicant: BASF AG

    Inventor： BUCHHOLZ KARL ,  STAHNECKER ERHARD ,  GROHMANN JOHANNES ,  MOELLER ROLF

    IPC: C08F291/00 ,  C08J9/00 ,  C08J9/20

    Abstract: 1,126,913. Expandable styrene polymers. BADISCHE ANILIN- & SODA-FABRIK A.G. 14 Jan., 1966 [16. Jan., 1965], No. 1819/66. Headings C3C and C3P. Particulate expandable styrene polymers are produced by polymerizing styrene with or without one or more olefinically unsaturated monomeric polymerizable compounds in aqueous suspension in the presence of an expanding agent and 0À001 to 1% by weight on the monomers of a water-insoluble polymer of a vinyl ester, vinyl ether, acrylic ester or methacrylic ester of molecular weight 10 4 to 10 6 which will dissolve in the monomers and which is not homogeneously miscible with the styrene polymers obtained. In examples styrene, with optionally acrylonitrile, was polymerized in an aqueous mixture of a copolymer of N-vinylpyrrolidone and methyl acrylate, sodium pyrophosphate, benzoyl peroxide; pentane, hexane, butane and/or dichlorofluoromethane; and either polyvinyl isobutyl ether, polymethyl acrylate or methacrylate, poly-2-ethylhexyl acrylate, polyvinyl acetate, a butyl acrylate/vinyl acetate copolymer, polyethyl acrylate or polyvinyl propionate.

    Continuous production of finely particled expandable styrene polymers
    25.
    发明专利
    Continuous production of finely particled expandable styrene polymers 未知

    公开(公告)号：GB1048243A

    公开(公告)日：1966-11-16

    申请号：GB3321963

    申请日：1963-08-22

    Applicant: BASF AG

    Inventor： OHLINGER HELMUT ,  GUENTHER WOLFGANG ,  SINGLE WINFRIED ,  BUCHHOLZ KARL ,  WILD HANS

    IPC: C08F279/02 ,  C08J9/16

    Abstract: Finely particled expandable styrene polymers are manufactured by a process wherein styrene or a mixture of monomers comprising styrene and one or more a -ethylenically unsaturated compounds which can be copolymerized with styrene, and an organic compound which is liquid or gaseous at standard pressure and temperature which does not dissolve or only swells the styrene polymer obtained by polymerization of styrene or the said mixture of monomers and which has a boiling point lower than the softening point of the styrene polymer, is continuously introduced at the top of a pressure vessel having a diameter less than its height, the styrene or the said mixture of monomers is polymerized with the temperature at the top of the pressure vessel being between 70 DEG C. and 130 DEG C. and at the bottom between 170 DEG C. and 230 DEG C. and the pressure in the pressure vessel being more than the vapour pressure of the organic compound and the monomers at the temperature prevailing at the bottom of the vessel, the composition comprising styrene polymer and organic compound is continually discharged at the bottom of the pressure vessel at a rate equivalent to that at which the monomers and organic compound are supplied at the top of the pressure vessel, and the composition is cooled to 20 DEG C. to 65 DEG C. and then reduced in size. The mixture of monomers should contain at least 50% by weight of styrene. A polymer of ethylenically unsaturated monomeric polymerizable compounds may also be added to the monomer mixture. In general the expanding agents have boiling points greater than - 45 DEG C., e.g. n-pentane, heptane, trichlorofluoroethane and trifluoro-1,1,2-trichloroethane. The ratio of diameter to height of the polymerization vessel may be between 1:100 and 1:5.

    Production of styrene suspension polymers
    26.
    发明专利
    Production of styrene suspension polymers 未知

    公开(公告)号：GB1038673A

    公开(公告)日：1966-08-10

    申请号：GB2229363

    申请日：1963-06-05

    Applicant: BASF AG

    Inventor： ZUERN LUDWIG ,  MUELLER-TAMM HEINZ ,  BUCHHOLZ KARL

    IPC: C08F2/18 ,  C08F2/20 ,  C08F12/08 ,  C08J9/20

    Abstract: 1,038,673. Styrene suspension polymers. BADISCHE ANILIN- & SODA FABRIK A.G. June 5, 1963 [June 6, 1962], No. 22293/63. Headings C3C and C3P. Suspension polymers are produced by polymerizing styrene or a mixture of at least 50% styrene and up to 50% of one or more other ethylenically unsaturated monomers in aqueous suspension using a polymerization catalyst in the presence of suspension stabilizers at 50- 120‹ C., the pressure in the polymerization vessel being increased by at least 1 / 5 th of the original pressure by forcing an inert gas into the vessel when the conversion has reached a point at which the polymer particles no longer coalesce. The monomers may contain an expanding agent, e.g. 3-5 aliphatic-, cyclic- or halo-hydrocarbons, or alcohols. The suspension stabilizers may be acrylamide, methacrylamide or N-vinylpyrrolidone polymers, polyvinyl alcohol, water-soluble cellulose derivatives, barium sulphate or calcium phosphate. The polymers may be obtained in bead form which can be expanded to form shaped articles. The styrene comonomers may be nuclear halo- or methyl-styrenes, α-methylstyrene, acrylonitrile, methacrylonitrile, acrylic or methacrylic esters, vinyl carbazole and may also include 0À001- 0À5% divinylbenzene. The catalyst may be organic peroxides, peresters, hydroperoxides and/or azo compounds.

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