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    PREPARATION OF BRANCHED BLOCK COPOLYMERS
    2.
    发明专利
    PREPARATION OF BRANCHED BLOCK COPOLYMERS 未知

    公开(公告)号：CA1180840A

    公开(公告)日：1985-01-08

    申请号：CA383818

    申请日：1981-08-13

    Applicant: BASF AG

    Inventor： HEINZ GERHARD ,  SCHMITT BURGHARD ,  DORN INGO H ,  GAUSEPOHL HERMANN ,  GERBERDING KARL ,  JUNG RUDOLF H ,  MITTNACHT HANS ,  POEHRT JUERGEN ,  WITTMER PAUL

    IPC: C08F297/04 ,  C08G81/02

    Abstract: of the disclosure: A process for the preparation of branched block copolymers of from 60 to 95 % by weight of a monovinyl-aromatic monomer and from 40 to 5 % by weight of a conjugated diene by polymerizing the monomers in an inert solvent in the presence of a monolithiumhydrocarbon as the initiator, wherein, in a first process stage (a), from 50 to 80, or where necessary at most 90, % by weight of the total amount of monovinyl-aromatic compound are polymerized to virtually complete conversion in the presence of a relatively small amount of the monolithium-hydrocarbon. This stage is carried out by starting with from 30 to 70 % by weight of the vinylaromatic monomer and adding from 70 to 30 % by weight in the feed, during the polymerization, in such a way that the polymerization temperature, which at the start of the polymerization is from 30 to 40.degree.C, is kept at from 45 to 70.degree.C, with use of reflux cooling. After all the monomer feed has been added the reaction temperature is lowered to 30- 40.degree.C by evaporative cooling. In a second process stage (b), an additional amount of initiator is added to the reaction solution, after which from 1 to 30 % by weight of the total amount of monovinyl-aromatic monomer can be added, the sum of the amounts of monovinylaromatic monomer added in the first and second process stages being at most 90 % by weight of the total amount of monovinyl-aromatic monomer. The monovinyl-aromatic monomer added in the second process stage is polymerized to virtually complete conversion, employing the temperature profile described for stage (a). In process stage (c), the remainder of the monovinyl-aromatic monomer and all of the conjugated diene are added, at least predominantly in the form of a mixture, and polymerized so that the reaction temperature does not rise above 90 - 110.degree.C. Finally, after virtually complete conversion of the monomers, and preferably without prior cooling, a suitable liquid polyfunctional coupling agent is run in undiluted and the mixture of the linear block copolymers obtained, which still contain active terminal lithium-carbon bonds, is coupled, with stirring, to form branched block copolymers. The products prepared according to the invention are used for injection molding.

    POLY(PHENYLENE ETHERS) AND THEIR PREPARATION
    4.
    发明专利
    POLY(PHENYLENE ETHERS) AND THEIR PREPARATION 未知

    公开(公告)号：CA1257741A

    公开(公告)日：1989-07-18

    申请号：CA496352

    申请日：1985-11-27

    Applicant: BASF AG

    Inventor： MITULLA KONRAD ,  HAMBRECHT JUERGEN ,  TESCH HELMUT ,  SCHMITT BURGHARD ,  MAEDER HANSJOACHIM

    IPC: C08G65/44 ,  C08G65/48

    Abstract: Disclosed is a method of preparing high molecular weight polyphenylene ethers from monohydric phenols. According to this method, the phenols are subjected to an oxydative coupling reaction with oxygen to produce poly(phenylene ethers) which are subsequently reacted with an epoxide of the general formula (I) (I) where R1 and R2 can be identical or different and are each alkyl, cycloalkyl, aryl, aryloxy, alkoxy or carboxyalkyl, each of which may contain a furtehr epoxide group, or C3-C20-alkyl-substituted amino, or R1 is hydrogen and R2 is one of the above groups, or R1 and R2 form part of a cycloalkyl ring. The polyphenylene ethers that are so obtained, are completely blocked and have a high molecular weight, a pale intresic colour and a high stability to thermal and thermooxidative attack.

    THERMOPLASTIC MOLDING MATERIAL
    5.
    发明专利
    THERMOPLASTIC MOLDING MATERIAL 未知

    公开(公告)号：CA1191986A

    公开(公告)日：1985-08-13

    申请号：CA417232

    申请日：1982-12-08

    Applicant: BASF AG

    Inventor： HAMBRECHT JUERGEN ,  SCHMITT BURGHARD ,  SWOBODA JOHANN ,  WASSMUTH GEORG ,  BERNHARD CLAUS ,  STEPHAN RUDOLF

    IPC: C08L25/08 ,  C08L25/12 ,  C08L51/00 ,  C08L51/04 ,  C08L25/02 ,  C08L51/06

    Abstract: The invention relates to a thermoplastic molding material of an elastomeric polymer A, a shell B grafted to the polymer A, and a copolymer C as rigid matrix. The amount of polymer A is 1 to 25 percent by weight based on the weight of A + B + C. It has a glass transition temperature, Tg, of less than 0.degree.C and an average particle size of 200 to 500 nanometers ( d50 value of the integral mass distribution) and is composed of: 50 to 99.9 percent by weight of at least one alkylacrylate with 1 to 8 carbon atoms in the alkyl radical and 0.1 to 5 percent by weight of a polyfunctional monomer which has a crosslinking action. Grafting shell B represents 5 to 40 percent by weight based on A + 9 + C and is composed of at least one of the monomers of the group of b1 ) vinylaromatic monomers, and b2 ) the ethylenically unsaturated monomers. Grafting shell B is prepared in two stages with 30 to 10 percent by weight of the monomers b1 being used in the first stage, and 30 to 70 percent by weight of a mixture of monomers b1 and b2 in a weight ratio of 90:10 to 60:40 being used in the second stage. Copolymer C is added in an amount of 35 to 94 percent by weight based on A + B + C and consists of a vinylaromatic monomer and an ethylenically unsaturated monomer. The molding material may contain commonly used additives in effective amounts and is used for the prepara--tion of molded parts.

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