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    11.
    发明专利
    未知

    公开(公告)号：DE4443966A1

    公开(公告)日：1996-06-13

    申请号：DE4443966

    申请日：1994-12-09

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT DR ,  JAHNS EKKEHARD DR ,  FISCHER WOLFGANG DR ,  MAC KEE GRAHAM EDMUND DR ,  ROSENAU BERNHARD DR

    IPC: C08F2/18 ,  C08F2/20 ,  C08F212/06 ,  C08F212/10 ,  C08L25/12 ,  C08L51/00 ,  C08L51/04 ,  C08L55/02 ,  C08F265/04 ,  C08L25/02

    Abstract: Thermoplastic moulding materials (I) contain (A) 35-99.5 wt.% of a matrix copolymer (A) of (a1) 50-95 wt.% styrene and/or alpha -methylstyrene (AMS), (a2) 5-50 wt.% acrylonitrile and (a3) 0-20 wt.% other comonomers, (B) 0-50 wt.% of a graft copolymer (B) with a mean particle dia. (d50) of 0.03-1 mu m which is insol. in (A), derived from (b1) 30-80 wt.% of a rubber-elastic polymer core with a Tg of below -10 degrees C and (b2) 20-70 wt.% of a graft shell consisting of a polymer which is fully or partly compatible with (A), and (C) 0.5-30 wt.% of crosslinked copolymer particles (C) with a mean d50 of 0.5-50 mu m which is insol. in (A), derived from (c1) 50-89.95 wt.% styrene and/or AMS, (c2) 10-50 wt.% acrylonitrile, (c3) 0.05-5 wt.% polyfunctional crosslinking monomer, (c4) 0-10 wt.% of a monomer with acid or basic gps. and (c5) 0-20 wt.% other comonomers. Also claimed are: (i) crosslinked copolymer particles (C) as above; (ii) a process for the prodn. of (C), comprising (a) prepn. of a fine aq. dispersion in which the monomer droplets have a mean d50 of 0.5-50 mu m by subjecting a mixt. contg. monomers (c1)-(c5) to intensive shear by means of stirrer blades with a circumferential speed of 10-25 m/sec. and (b) polymerising the mixt. with a radical initiator at a moderate stirrer speed of less than 3 m/sec.; (iii) particulate copolymers (C) obtd. by this process; (iv) moulded prods. made from (I).

    13.
    发明专利
    未知

    公开(公告)号：AT137511T

    公开(公告)日：1996-05-15

    申请号：AT93112779

    申请日：1993-08-10

    Applicant: BASF AG

    Inventor： DECKERS ANDREAS DR ,  GUENTHERBERG NORBERT DR

    IPC: C08F2/18 ,  C08F20/12

    Abstract: Polymers obtainable by suspension polymerisation of from 50 to 100% by weight of at least one compound selected from the group consisting of C1-C18-alkyl esters of acrylic acid and methacrylic acid, and from 0 to 50% by weight of further free-radical-polymerisable monomers, in the presence of a buffer selected from the group consisting of citric acid, alkali metal citrates, alkaline earth metal citrates and ammonium citrates, and a process for the preparation of these polymers, and their use for the production of mouldings.

    17.
    发明专利
    未知

    公开(公告)号：DE4431733A1

    公开(公告)日：1996-03-07

    申请号：DE4431733

    申请日：1994-09-06

    Applicant: BASF AG

    Inventor： TIEFENSEE KRISTIN DR ,  GUENTHERBERG NORBERT DR ,  NEUMANN RAINER DR

    IPC: C08L25/12 ,  C08L33/00 ,  C08L33/04 ,  C08L33/12 ,  C08L51/04 ,  C08L25/00

    Abstract: A thermoplastic moulding material (I) comprises a mixt. of (A) 15-70 wt.% methyl methacrylate polymer obtd. from a mixt. of (A1) 80-93 wt.% methyl methacrylate and (A2) 7-20 wt.% acrylic acid 1-8C alkyl ester, with viscosity index 55-60 ml/g (0.5 wt.% soln. in dimethyl formamide at 23 degrees C); (B) 10-50 wt.% copolymer obtd. from a mixt. of (B1) 78-88 wt.% vinyl aromatic monomers (w.r.t. (B)) and (B2) 12-22 wt.% vinyl cyanide (w.r.t. (B)), with viscosity index 60-80 ml/g (0.5 wt.% soln. in dimethyl formamide at 23 degrees C); (C) 20-50 wt.% graft polymer obtd. from (C1) 50-80 wt.% monomer mixt. core comprising (C11) 50-100 wt.% 1,3-diene and (C12) 0-50 wt.% vinyl aromatic monomer, and (C2) 20-50 wt.% graft obtd. by polymerisation in the presence of (C1) of a mixt. comprising (C21) 40-100 wt.% (meth)acrylic acid 1-8C alkyl ester and (C22) 0-60 wt.% vinyl aromatic monomer, with mean particle size of (C) 40-500 nm; and (D) 0-20 wt.% standard additives (w.r.t. sum of (A)-(C)). The sum of (A)-(C) is 100 wt.% and the difference in break index between (C) and the mixt. of (A), (B) and opt. (D) is less than 0.005. Also claimed are (i) prepn. of (I) by compounding (A)-(D) at 200-300 degrees C; (ii) use of (I) for making moulded prods.; and (iii) moulded prods. made from (I).

    19.
    发明专利
    未知

    公开(公告)号：DE4241555A1

    公开(公告)日：1994-06-16

    申请号：DE4241555

    申请日：1992-12-10

    Applicant: BASF AG

    Inventor： NIESSNER NORBERT DR ,  GUENTHERBERG NORBERT DR

    IPC: C08L25/12 ,  C08L51/04 ,  C08L55/02 ,  C08L69/00 ,  C08L51/00 ,  C08L25/02 ,  D01F6/56

    Abstract: Thermoplastic moulding compositions containing, as essential components, A) from 1 to 30% by weight of a polycarbonate, B) from 10 to 50% by weight of a graft polymer built up from b1) from 40 to 80% by weight of a graft base comprising an elastomeric polymer having a glass transition temperature of below 10@C, b2) from 20 to 60% by weight of a graft shell comprising b21) from 50 to 95% by weight of styrene or substituted styrenes of the formula I where R is an alkyl radical having 1 to 8 carbon atoms or a hydrogen atom and R an alkyl radical having 1 to 8 carbon atoms and n has a value 0, 1, 2 or 3, or methyl acrylate or methyl (meth)acrylate, or mixtures thereof, and b22) from 5 to 50% by weight of acrylonitrile, methacrylonitrile, methyl acrylate, methyl methacrylate, maleic anhydride, maleimides which are N-substituted by C1- to C8-alkyl or C6- to C20-aryl, or mixtures thereof, C) from 5 to 80% by weight of a thermoplastic copolymer comprising c1) from 50 to 85% by weight of styrene or substituted styrenes of the formula I, or mixtures thereof, c2) from 15 to 50% by weight of acrylonitrile or methacrylonitrile or mixtures thereof, D) from 5 to 80% by weight of a thermoplastic polymer comprising d1) from 50 to 85% by weight of styrene or substituted styrenes of the formula I, or mixtures thereof, and d2) from 15 to 50% by weight of acrylonitrile or methacrylonitrile, or mixtures thereof, which is different from component D), with the proviso that the proportion by weight of component d2), based on the total weight of component D), is less than the proportion by weight of component c2), based on the total weight of component C).

    20.
    发明专利
    未知

    公开(公告)号：DE4228571A1

    公开(公告)日：1994-03-03

    申请号：DE4228571

    申请日：1992-08-27

    Applicant: BASF AG

    Inventor： DECKERS ANDREAS DR ,  GUENTHERBERG NORBERT DR

    IPC: C08K3/40 ,  C08K7/14 ,  C08L25/02 ,  C08L25/12 ,  C08L33/24 ,  C08L51/06 ,  C08J5/08 ,  C08F8/32 ,  C08F20/52

    Abstract: A thermoplastic moulding composition comprising, based on the sum of A, B, C and D, A: from 30 to 95% by weight of a copolymer A comprising, in each case based on A, a1: from 50 to 95% by weight of styrene, alpha -methylstyrene, a ring-substituted styrene derivative or mixtures of these monomers (a1) and a2: from 5 to 50% by weight of acrylonitrile (a2), B: up to 60% by weight of a graft copolymer B b1: prepared either by emulsion polymerisation of, based on B, from 15 to 85% by weight of a monomer mixture based either on b11: styrene/acrylonitrile in a ratio of from 9:1 to 4:6 or b12: styrene/acrylonitrile/methyl methacrylate in a ratio of from 19:1:0 to 8:6:6, onto from 15 to 85% by weight of a latex, obtained as emulsion, of an elastomer based on butadiene or acrylate as the graft base; or by b2: solution polymerisation of, based on B, from 15 to 85% by weight of a monomer mixture based on b21: styrene/acrylonitrile in a ratio of from 9:1 to 4:6 or b22: styrene/acrylonitrile/methyl methacrylate in a ratio of from 19:1:1 to 8:6:6 onto from 15 to 85% by weight of an elastomer, prepared in solution, based on butadiene or an acrylate or an EPDM elastomer as the graft base; C: from 1 to 40% by weight of a reinforcing agent C based on an inorganic glass and D: from 0.1 to 10% by weight of a copolymer D comprising, based on B, d1: from 10 to 90% by weight of units of the formula I in which R and R are hydrogen or methyl, and R is hydrogen, C1-C8-alkyl, C5-C12-cycloalkyl or C6-C16-aryl or arylalkyl, and d2: from 10 to 90% by weight of units derived from a copolymerisable monomer selected from styrene, alpha -methylstyrene, (meth)acrylonitrile and (meth)acrylates. y

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