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    42.
    发明专利
    未知

    公开(公告)号：DE19638094A1

    公开(公告)日：1998-03-19

    申请号：DE19638094

    申请日：1996-09-18

    Applicant: BASF AG

    Inventor： HUNGENBERG KLAUS-DIETER DR ,  BAUMGAERTEL MICHAEL DR ,  KOCH JUERGEN DR ,  FISCHER WOLFGANG DR ,  THIELE REINER PROF DR

    IPC: B01J19/24 ,  C08F2/02 ,  C08F20/14

    Abstract: The invention concerns methyl-methacrylate polymers with an heterogeneity of 1.0 to 1.2. Said polymers are obtained continuously by polymerization of monomers consisting of no less than 90 % by weight methyl-methacrylate in a recycle reactor, which has preferably at least a tubular reactor or a multitube-flow reactor, avoiding unwarranted wall deposits. Said polymers are produced in such a way that temperature during polymerization stands at 135-150 DEG C, the recycle relation is bigger than 20 when divided by the number of chargings per circulation loop, the mean effective axial circulation is faster than 5 cm/s, a polymerization initiator having a batch half change value of 3 to 10 min. is used, and the inflow concentration of the initiator is set in such a way that by a mean residence time of 1.3 to 2.5 hours a polymer rupture of 0.50 to 0.70 at the output of the reactor is achieved. Preforms having very good optical properties can be produced with the homogeneous polymers.

    Block copolymers used for making transparent or translucent films or moulded articles
    43.
    发明专利
    Block copolymers used for making transparent or translucent films or moulded articles 未知

    公开(公告)号：DE19626838A1

    公开(公告)日：1998-01-08

    申请号：DE19626838

    申请日：1996-07-04

    Applicant: BASF AG

    Inventor： FISCHER MICHAEL DR ,  KOCH JUERGEN DR

    IPC: C08F293/00 ,  C08F297/00

    Abstract: Block copolymers (BC) prepared by reacting the following monomers at 100-160 deg C in the presence of radical initiators and N-oxyl radicals are new :(A) monomers chosen from (alpha-methyl)styrene, (meth)acrylonitrile, methyl methacrylate or maleic acid, forming blocks with a glass transition temperature (Tg) greater than 0 deg C ; and (B) monomers chosen from n-butyl acrylate, methyl acrylate or 2-ethylhexyl acrylate, forming blocks with a Tg less 0 deg C. Also claimed are (i) the preparation of (BC), (ii) transparent or translucent films or moulded articles comprising (BC), and (iii) the use of (BC) for the preparation of these films or articles.

    Weather resistant thermoplastic moulding materials for e.g. car parts
    46.
    发明专利
    Weather resistant thermoplastic moulding materials for e.g. car parts 未知

    公开(公告)号：DE19508312A1

    公开(公告)日：1996-09-12

    申请号：DE19508312

    申请日：1995-03-09

    Applicant: BASF AG

    Inventor： MAC KEE GRAHAM EDMUND DR ,  KOCH JUERGEN DR ,  FISCHER WOLFGANG DR ,  ROSENAU BERNHARD DR ,  CZAUDERNA BERNHARD DR

    IPC: C08L25/12 ,  C08L51/00 ,  C08L51/06 ,  C08L25/00

    Abstract: Thermoplastic moulding materials (I) contg. (A) 30-90 wt% thermoplastic polymer with a Tg of more than 20 deg C; (B) 10-70 wt% of a graft copolymer derived from (b1) 30-90 wt% grafting base with a Tg of below 10 deg C, based on (b11) 50-99.94 wt% (1-30C alkyl) acrylate(s), (b12) 0-49.9 wt% unsatd. comonomer and (b13) 0.01-10 wt% of a mixt. of dihydro-dicyclo- pentadienyl acrylate (DCPA) and other difunctional crosslinking monomer(s), and (b2) 10-70 wt% of a grafted shell derived from (b21) 50-95 wt% vinylaromatic monomer and (b22) 5-50 wt% polar comonomer(s), i.e. (meth)acrylonitrile, (1-20C alkyl) (meth)acrylate(s), maleic anhydride, (meth)acrylamide and/or vinyl 1-8C alkyl ether(s); (C) 0-50 wt% fibrous and/or particulate filler(s); and (D) 0-30 wt% normal additives etc.

    47.
    发明专利
    未知

    公开(公告)号：DE19503545A1

    公开(公告)日：1996-08-08

    申请号：DE19503545

    申请日：1995-02-03

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG DR ,  KOCH JUERGEN DR ,  MC KEE GRAHAM EDMUND DR

    IPC: C08L25/02 ,  C08F265/00 ,  C08F265/04 ,  C08F285/00 ,  C08L25/12 ,  C08L51/00 ,  C08L51/06 ,  C08L101/00 ,  C08F265/06 ,  C08F279/02 ,  C08F212/06 ,  C08J3/20

    Abstract: Particulate graft copolymers (A) comprise (a1) 5-70 wt. % grafting base with a Tg of below 10 degrees C based on (a11) 50-99.94 wt. % (1-30C alkyl) acrylate(s), (a12) 0-49.9 wt % mono-unsatd. comonomer and (a13) 0.01-5 wt. % polyfunctional crosslinking monomers, (a2) 20-85 wt. % of a shell polymerised in the presence of (a1) from (a21) 95-100 wt % monomer(s) with a refractive index (n D) of more than 1.51 and (a22) 0-5 wt. % polyfunctional crosslinking monomers, and (a3) 10-50 wt % other shell(s) polymerised in the presence of the prod. of (a2), from (a31) 50-95 wt % vinylaromatic monomer and (a32) 5-50 wt % (meth)acrylonitrile, (1-20C alkyl) (meth)acrylates, maleic anhydride, (meth)acrylamide and/or vinyl (1-8C alkyl) ethers. Also claimed are thermoplastic moulding materials contg. graft copolymer particles (A) and another thermoplastic polymer (B) with a Tg of more than 20 degrees C.

    48.
    发明专利
    未知

    公开(公告)号：DE19503117A1

    公开(公告)日：1996-08-08

    申请号：DE19503117

    申请日：1995-02-01

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG DR ,  KOCH JUERGEN DR ,  MC KEE GRAHAM EDMUND DR

    IPC: C08L51/00 ,  C08F265/00 ,  C08F265/04 ,  C08F265/06 ,  C08L25/02 ,  C08L51/06 ,  C08L51/04 ,  C08L55/02

    Abstract: Graft copolymers (A) comprise (a1) 30-90 wt. % grafting base with a Tg of below 10 degrees C, obtd. from (a11) 10-99.8 wt % 2-ethylhexyl acrylate, (a12) 0-89.8 wt. % other (2-32C alkyl) acrylate, (a13) 0.2-6 wt % diene with at least two conjugated double bond, (a14) 0-10 wt. % polyfunctional crosslinking monomer with no conjugated double bonds and (a15) 0-40 wt % other comonomers, and (a2) 10-70 wt. % of a grafted shell made up of (a21) 50-95 wt. % vinylaromatic monomer, (a22) 5-50 wt % (meth)acrylonitrile, (1-8C alkyl) (meth)acrylate, maleic anhydride, (meth)acrylamide and/or vinyl (1-8C alkyl) ether. Also claimed are thermoplastic moulding materials contg. 10-70 wt. % (A), 30-90 wt. % thermoplastic polymer (B) with a Tg of more than 20 degrees C, 0-50 wt. % filler particles (C) and 0-30 wt. % additives and processing aids (D).

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