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    PROCESS FOR THE PREPARATION OF VINYLAROMATIC POLYMERS MODIFIED BY RUBBERS
    2.
    发明专利
    PROCESS FOR THE PREPARATION OF VINYLAROMATIC POLYMERS MODIFIED BY RUBBERS 未知

    公开(公告)号：DE3166145D1

    公开(公告)日：1984-10-25

    申请号：DE3166145

    申请日：1981-06-02

    Applicant: BASF AG

    Inventor： ECHTE ADOLF DR ,  GAUSEPOHL HERMANN DR ,  HOFMANN HERMANN PANKRAZ DR ,  MITTNACHT HANS DR

    IPC: C08F2/38 ,  C08F4/00 ,  C08F212/06 ,  C08F279/02

    Abstract: A process, carried out without a diluent or in solution, in more than 2 reaction zones, for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a monomeric aromatic vinyl compound and an elastomeric polymer, in an amount of from 3 to 16% by weight based on the monomer, are polymerized, in the absence of a free radical initiator, but in the presence of a mercaptan as a chain transfer agent, at from 80 DEG to 180 DEG C. in a first reaction zone, with stirring, up to a maximum monomer conversion, Umax, given by the equation Umax=K-1 where K is the amount of rubber in % by weight based on monomer, and, in a second reaction zone, polymerization is continued, with stirring, to a conversion of up to about 50% by weight, after which a chain transfer agent is introduced in an amount of from 0.01 to 0.2% by weight, based on vinyl-aromatic monomer, and polymerization is continued, if appropriate in more than one reaction zone, up to a monomer conversion of less than 85% by weight. The polymer is treated in a devolatilization zone to remove vinyl-aromatic monomer and solvent, if any, and these constituents are recycled to the process. The process produces products which exhibit good gloss coupled with good mechanical properties, and which can be employed for conventional applications.

    3.
    发明专利
    未知

    公开(公告)号：DE58901342D1

    公开(公告)日：1992-06-11

    申请号：DE58901342

    申请日：1989-12-23

    Applicant: BASF AG

    Inventor： SCHWABEN HANS-DIETER DR ,  SCHLICHTMANN RAINER ,  KINDLER HUBERT DR ,  KLAERNER PETER DR ,  MITTNACHT HANS DR

    IPC: C08F279/00 ,  C08F279/02 ,  C08L25/06 ,  C08L51/04

    Abstract: An impact-resistant thermoplastic molding material which contains, based in each case on A+B, from 80 to 50% by weight of a hard matrix A of polystyrene having a molecular weight &upbar& M eta of from 150,000 to 200,000 and from 50 to 20% by weight of a soft phase B which is uniformly distributed in the hard matrix and has a median particle diameter d50 (volume average) of from 1 to 10 mu m, and can be obtained by polymerizing styrene in the presence of an elastomeric grafting base, advantageously has a molecular weight of the grafted branches of from 1.1 to 1.35 times the molecular weight of the hard matrix, and the degree of grafting is from 50 to 100%.

    Thermoplastic moulding materials with impact strength and rigidity
    6.
    发明专利
    Thermoplastic moulding materials with impact strength and rigidity 未知

    公开(公告)号：DE4015654A1

    公开(公告)日：1991-11-21

    申请号：DE4015654

    申请日：1990-05-16

    Applicant: BASF AG

    Inventor： SCHWABEN HANS-DIETER DR ,  KINDLER HUBERT DR ,  MITTNACHT HANS DR

    IPC: C08F279/00 ,  C08F279/02

    Abstract: Thermoplastic moulding materials (I) comprising a hard matrix (A) derived from vinylaromatic monomer(s) (a1) and polar comonomer(s) (a2), and a soft phase (B) are claimed. (I) are obtd. by bulk- or soln.-polymerisation of (a1) and (a2) in the presence of a dissolved elastomeric graft base (II), contg. 1.5-6.5 wt.% (meth)acrylate ester as comonomer (a2). More specifically, (a2) is an ester of (meth)acrylic acid and a 2-5C (pref. 3-5C) alcohol. (I) contains rubber in the form of microcapsules or cellular particles with mean dia. 200-1000nm. (I) contains 3-25 wt.% (II) (namely butadiene and/or isoprene polymers; based on iodine number), together with normal additives, etc..

    7.
    发明专利
    未知

    公开(公告)号：DE3811014A1

    公开(公告)日：1989-10-19

    申请号：DE3811014

    申请日：1988-03-31

    Applicant: BASF AG

    Inventor： BUESCHL RAINER DR ,  ECHTE ADOLF DR ,  SCHULTE KONRAD DR ,  MITTNACHT HANS DR

    IPC: C08F279/00 ,  C08F279/02

    Abstract: The moulding composition contains, in each case based on A + B, from 80 to 55% by weight of a hard matrix A comprising a copolymer of at least 95% by weight of a vinyl aromatic monomer a11 having 8 to 10 carbon atoms and at least one comonomer a12 in a proportion of from 0.1 to 5% by weight, based on A, from 45 to 20% by weight of a soft phase B which is uniformly distributed in the hard matrix and has a mean particle diameter d50 (volume average) of from 3.5 to 9 mu m and is obtainable by polymerisation of the mixture of monomers a11 and a12 in the presence of an elastomer (rubber) with subsequent isolation of the target product, the comonomer a12 having the formula I in which X is an-OR , COOR or -CONHR radical and R is hydrogen or methyl and R and R are each an alkyl radical having 1 or 2 to 10 carbon atoms and carrying at least 1 OH group or an epoxide group or at least one other polar group.

    10.
    发明专利
    未知

    公开(公告)号：ES2065931T3

    公开(公告)日：1995-03-01

    申请号：ES89105092

    申请日：1989-03-22

    Applicant: BASF AG

    Inventor： BUESCHL RAINER DR ,  ECHTE ADOLF PROF DR ,  SCHULTE KONRAD DR ,  MITTNACHT HANS DR

    IPC: C08F279/00 ,  C08F279/02

    Abstract: The moulding composition contains, in each case based on A + B, from 80 to 55% by weight of a hard matrix A comprising a copolymer of at least 95% by weight of a vinyl aromatic monomer a11 having 8 to 10 carbon atoms and at least one comonomer a12 in a proportion of from 0.1 to 5% by weight, based on A, from 45 to 20% by weight of a soft phase B which is uniformly distributed in the hard matrix and has a mean particle diameter d50 (volume average) of from 3.5 to 9 mu m and is obtainable by polymerisation of the mixture of monomers a11 and a12 in the presence of an elastomer (rubber) with subsequent isolation of the target product, the comonomer a12 having the formula I in which X is an-OR , COOR or -CONHR radical and R is hydrogen or methyl and R and R are each an alkyl radical having 1 or 2 to 10 carbon atoms and carrying at least 1 OH group or an epoxide group or at least one other polar group.

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