中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

168 records (took 0.028 seconds)

    THERMOPLASTIC ELASTOMER
    31.
    发明专利
    THERMOPLASTIC ELASTOMER 未知

    公开(公告)号：CA2193264A1

    公开(公告)日：1995-12-28

    申请号：CA2193264

    申请日：1995-06-08

    Applicant: BASF AG

    Inventor： KNOLL KONRAD ,  GAUSEPOHL HERMANN ,  NIEBNER NORBERT ,  BENDER DIETMAR ,  NAEGELE PAUL

    IPC: C08F297/04 ,  C08J5/18 ,  C08L53/02

    Abstract: A rubber elastic block copolymer has at least one block A made of polymerised units of a vinyl aromatic monomer that forms a hard phase and/or a block B with diene monomers that forms a first rubber elastic (soft) phase, and at least one elastomer block B/A with polymerised units of both a vinyl aromatic monomer and a diene that forms if required a second or additional soft phase. The glass transition temperature Tg of block A is higher than 25 ~C and that of blocks B or B/A is lower than 25 ~C. The phase volume ratio between blocks A and B/A is selected so that the hard phase represents 1 - 40 % by volume of the total block copolymer and the diene amounts to less than 50 % by weight.

    CONTINUOUS PREPARATION OF RUBBER-MODIFIED POLYMERS OF VINYL-AROMATICS USING A PER-ESTER OR DIACYL PEROXIDE INITIATOR
    32.
    发明专利
    CONTINUOUS PREPARATION OF RUBBER-MODIFIED POLYMERS OF VINYL-AROMATICS USING A PER-ESTER OR DIACYL PEROXIDE INITIATOR 未知

    公开(公告)号：CA1175592A

    公开(公告)日：1984-10-02

    申请号：CA383857

    申请日：1981-08-13

    Applicant: BASF AG

    Inventor： JENNE HELMUT ,  GAUSEPOHL HERMANN ,  MITTNACHT HANS

    IPC: C08F279/02 ,  C08F4/34 ,  C08F253/00

    Abstract: A process for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a mixture which contains a monomeric aromatic vinyl compound and an elastomeric polymer synthesized predominantly from 1,3-dienes is reacted in the presence of from 0.5 x 10-2 to 5 x 10-2 mole %, based on monomer, of a per-ester or diacyl peroxide as the free radical initiator and of a mercaptan as a chain transfer agent, the molar ratio of free radical initiator to chain transfer agent being from 3.4 to 0.1. The reaction takes place at an elevated temperature, in two or more process stages, under conditions such that the intrinsic viscosity (determined in 0.5% strength by weight solution in toluene at 23.degree.C) of the matrix-forming polymer, produced from the vinyl-aromatic monomer, is from 65 to 45 ml/g. The polymer obtained is freed from vinyl-aromatic monomer and from solvent, is any, in a devolatilization zone and is used for the production of injection moldings.

    34.
    发明专利
    未知

    公开(公告)号：DE59909649D1

    公开(公告)日：2004-07-08

    申请号：DE59909649

    申请日：1999-03-03

    Applicant: BASF AG

    Inventor： KNOLL KONRAD ,  NIESSNER NORBERT ,  WUENSCH JOSEF ,  GAUSEPOHL HERMANN

    IPC: C08J5/00 ,  C08J5/18 ,  C08L25/06 ,  C08L53/02

    Abstract: Polymer mixtures compriseP1) from 1 to 85% by weight of an elastomeric block copolymer which has been built up from hard blocks S made from vinylaromatic monomers and from random soft blocks B/S made up from dienes and from vinylaromatic monomers, and which contains at least the block structure S-B/S-S, where the diene content is less than 50 percent by weight and the proportion of the soft phase formed from the blocks B/S is at least 60 percent by weight, based in each case on the entire block copolymer,P2) from 5 to 89% by weight of a block copolymer differing from P1) and made from vinylaromatic monomers and from dienes,P3) from 10 to 94% by weight of glass-clear or impact-modified polystyrene or mixtures thereof, andP4) from 0 to 84% by weight of other additives,where the total of components P1) to P4) is 100%.

    35.
    发明专利
    未知

    公开(公告)号：ES2207956T3

    公开(公告)日：2004-06-01

    申请号：ES99934213

    申请日：1999-01-26

    Applicant: BASF AG

    Inventor： FISCHER WOLFGANG ,  BUCHNER EUGEN-WALTER ,  DEIMLING AXEL ,  GAUSEPOHL HERMANN ,  SCHADE CHRISTIAN

    IPC: C08F2/00 ,  C08F279/02 ,  C08F287/00 ,  B01J19/18

    Abstract: A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.

    36.
    发明专利
    未知

    公开(公告)号：DE50005347D1

    公开(公告)日：2004-03-25

    申请号：DE50005347

    申请日：2000-08-01

    Applicant: BASF AG

    Inventor： JUENGLING STEPHAN ,  GAUSEPOHL HERMANN ,  WARZELHAN VOLKER

    IPC: C08F2/06 ,  C08C19/44 ,  C08F4/48 ,  C08F4/52 ,  C08F36/04 ,  C08F279/02

    Abstract: A process for preparing a solution of high molecular weight polymers of conjugated dienes in a vinylaromatic hydrocarbon by anionic polymerization of the diene in the presence of an alkyllithium as catalyst and a process for preparing impact-modified polymers of vinylaromatic compounds is described. The first process comprises firstly polymerizing the diene in solution in an aromatic hydrocarbon which is free of ethylenic double bonds to a molecular weight below about 105, then adding a trialkylaluminum in a molar excess relative to the alkyllithium, diluting the solution obtained with the vinylaromatic compound and then coupling the polydiene with a polyepoxide or an alkyl (meth)acrylate to give a high molecular weight polymer. The solution obtained in this way is further processed to give an impact-modified polymer of a vinylaromatic hydrocarbon by polymerizing the solution prepared as described, if desired after addition of further amounts of a vinylaromatic compound, in a manner known per se.

Patent Agency Ranking