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    33.
    发明专利
    未知

    公开(公告)号：FI800072A

    公开(公告)日：1980-07-28

    申请号：FI800072

    申请日：1980-01-10

    Applicant: BASF AG

    Inventor： HARTMANN JUERGEN ,  STEDEFEDER JOACHIM ,  DENZINGER WALTER ,  PFOHL SIGBERG

    IPC: D21H19/20 ,  D21H17/43 ,  D21H

    Abstract: A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.

    Production of propylene polymers with improved impact resistance
    36.
    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.

    Process for the polymerisation of mono-a-olefines with three or more carbon atoms
    38.
    发明专利
    Process for the polymerisation of mono-a-olefines with three or more carbon atoms 未知

    公开(公告)号：GB940125A

    公开(公告)日：1963-10-23

    申请号：GB3397161

    申请日：1961-09-22

    Applicant: BASF AG

    Inventor： LAUTENSCHLAGER HANS ,  STEDEFEDER JOACHIM

    IPC: C08F4/16 ,  C08F10/00

    Abstract: 940,125. Polymerization catalysts for alphaolefines. BADISCHE ANILIN - & SODAFABRIK A.G. Sept. 22, 1961 [Sept. 23, 1960], No. 33971/61. Heading C3P. A polymerization catalyst system for monoalpha-olefines comprises (a) a compound of a metal of Group IV(B), V(B), VI(B), or VIII, of the Periodic Table defined below, (b) an organometallic compound of a metal of Group I to IV of the Periodic Table, and (c) a compound containing the grouping -C-N= -C-N= ## or ## . The O S Periodic Table referred to is published in the " Handbook of Chemistry and Physics ", p. 394, 38th Edition, 1956/57, by the Rubber Publishing Company. The polymerization is generally effected in an inert hydrocarbon diluent. Specified mono-olefines are propylene, n-butene-(1), 3- methyl-butene-(1), pentene-(1), 4-methyl-pentene- (1), and 5-methyl hexene-(1). Component (a) of the catalyst may be titanium trichloride, vanadium trichloride, vanadyl chloride, chromium trichloride, chromium oxide, chromyl chloride, or titanium acetylacetonate. Component (b) may be lithium butyl, beryllium diethyl, magnesium diethyl, aluminium trimethyl or triethyl, lead tetraethyl, tin tetraethyl, diethylaluminium hydroxyethyl, or dehydroxyethylaluminium ethyl. Component (c) may be formamide, dimethyl, diethyl, dibutyl, or di-2-ethylhexyl formamide, N-ethylformanilide, oleic acid hexamethyleneimide, N-formylpyrroliolone, caprylic lactam, omega-lauric lactam, diphenyl thiourea acelanilide, ethylcaproic acid amide, N, N 1 -dibutylurea, or betaine hydrochloride. The preferred catalyst systems are titanium trichloride, aluminium triethyl, and alpha-dialkylformamide or betaine hydrochloride. The polymerizates may be worked up by conventional techniques e.g. addition of methanol. The polymers recovered contain over 80% of an isotactic fraction insoluble in boiling heptane. Specification 904,083 is referred to.

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