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    Biaxially drawn styrene!-butadiene! block copolymer foil prodn. - from linear or branched copolymer opt. mixed with polystyrene or polyphenylene oxide
    2.
    发明专利
    Biaxially drawn styrene!-butadiene! block copolymer foil prodn. - from linear or branched copolymer opt. mixed with polystyrene or polyphenylene oxide 未知

    公开(公告)号：DE3049186A1

    公开(公告)日：1982-07-29

    申请号：DE3049186

    申请日：1980-12-24

    Applicant: BASF AG

    Inventor： POHRT JUERGEN ,  SCHMITT BURGHARD DIPL CHEM DR ,  GERBERDING KARL DIPL CHEM DR ,  MITTNACHT HANS DIPL CHEM DR

    IPC: B29C55/00 ,  C08L53/02 ,  B29D7/24

    Abstract: Biaxial drawing is used in the prodn. of melt-extruded, drawn foils of styrene-butadiene block copolymers, prepd. by anionic polymerisation and contg. by wt. 60-90% vinyl aromatic monomers and 40-10% conjugated diene. The compsn. consists of (a) mixts. of linear block copolymers having structure (I) and (II) (where A1, A2 and A3 are nonelastomeric polymer segments of at least 1 monovinyl aromatic monomer and B are elastomeric polymer segments of at least 1 conjugated diene; hyphens denote sharp- and arrows denote blurred transitions between the polymer segments) or of branched block copolymers having structures (b) (A1-A2-B)n-X-(B-A2)m (where n and m are variable nos., provided the sum of m plus n is at least 3 and m is equal to or higher than n; and X is a polyfunctional coupling agent via which the branch-forming copolymer chains are bonded chemically) or (c) (III) or (d) (IV) or mixts. of the block copolymers (a) to (d) with one another, opt. with polystyrene or impact-resistant-modified polystyrene or polyphenylene oxides. The foils are used esp. for packing foods to be stored at low temps. Biaxially drawn foils have improved mechanical properties at low and room temp. The foils are glossy, transparent even when blended with up to 40% polystyrene and resist tear.

    5.
    发明专利
    未知

    公开(公告)号：DE3880792D1

    公开(公告)日：1993-06-09

    申请号：DE3880792

    申请日：1988-11-04

    Applicant: BASF AG

    Inventor： WALTER HANS-MICHAEL DR ,  POHRT JUERGEN ,  GAUSEPOHL HERMANN DR ,  BRONSTERT KLAUS DR ,  BENEDIX FRANZ

    IPC: C08F2/06 ,  C08F297/04

    Abstract: Discontinuous processes (A, B, C) for prepn. of the copolymers (I) contg. polymerised 50-95 wt.% styrene (S) and 50-5 wt.% 4 or 5C conjugated diene (B) on (I) comprise (1) sequential anionic polymerisation of (S) and (B) in presence of solvent using Li-organic cpd. as initiator (Ir), of which minor proportion is added at beginning of sequential polymerisation and major proportion afterwards, the sequentially added (S) and (B) portions each being completely polymerised (2) coupling mixt. of living block copolymer anions of bimodal mol. wt. distribution obtd. by this sequential anionic polymerisation with a polyfunctional coupling agent (3) opt. treatment with proton donor, (4) removal of solvent.

    6.
    发明专利
    未知

    公开(公告)号：DE58900897D1

    公开(公告)日：1992-04-09

    申请号：DE58900897

    申请日：1989-05-06

    Applicant: BASF AG

    Inventor： WALTER HANS-MICHAEL W- FREINSH ,  BRONSTERT KLAUS DR ,  GAUSEPOHL HERMANN DR ,  POHRT JUERGEN

    IPC: C08F4/42 ,  C08F4/48 ,  C08F297/04 ,  C08L25/06 ,  C08L53/00 ,  C08L53/02

    Abstract: The invention relates to a transparent, thermoplastic moulding composition containing, based on A + B,… A 5 to 95% by weight of polystyrene and… B 95 to 5% by weight of a non-elastomeric block copolymer with stellate branches, built up from, based on B,… b1 60 to 95% by weight of styrene and… b2 5 to 40% by weight of at least one conjugated diene having 4 or 5 carbon atoms,… prepared in a conventional manner by sequential anionic polymerisation by means of at least one organolithium compound as initiator and in the presence of a solvent, with subsequent coupling, characterised in that component A is produced by conventional anionic polymerisation by means of at least one organolithium compound in the presence of an organic solvent. … The moulding composition is prepared by conventional mixing of components A and B and, if used, C, and is used for the production of mouldings.

    Thermoplastic moulding compsn. for calendering to film - contg. non-elastomeric block copolymer of styrene and conjugated diene:amide sterically hindered phenol and stearate
    7.
    发明专利
    Thermoplastic moulding compsn. for calendering to film - contg. non-elastomeric block copolymer of styrene and conjugated diene:amide sterically hindered phenol and stearate 未知

    公开(公告)号：DE4009065A1

    公开(公告)日：1990-10-04

    申请号：DE4009065

    申请日：1990-03-21

    Applicant: BASF AG

    Inventor： MUELLER GUENTER ,  POHRT JUERGEN ,  HATZMANN GUENTER DR

    IPC: C08K5/098 ,  C08K5/20 ,  C08L53/02

    Abstract: A calanderable, thermoplastic moulding compsn. contains (A) at least 95 wt.% of a non-elastomeric, star-shaped, branched block copolymer from (a) 60-95 wt.% of styrene and (b) 40-5% of a 4-5C conjugated diene, obtd. by sequential anionic polymerisation of (a) and/or (b) with an organo-Li cpd. as initiator in presence of a solvent, followed by coupling, (B) up to 0.2% of an amide of stearic acid or erucic acid as anti-blocking agent, (C) 0.05-2% of a sterically hindered phenol as stabiliser, and (D) 0.05-2% of a stearate of Sn, Ca or an alkali metal as lubricant. USE/ADVANTAGE - The compsns. can be calandered to transparent films with a good surface and uniform thickness. The films do not adhere to the rollers and can be withdrawn from the last calander roller without overrun. The films have a quality similar to that of extruded films, can be deep-drawn and can be used for all the applns. of extruded films. The compsn. is used for prodn. of films.

    THERMOPLASTIC MOULDING MASS
    9.
    发明专利
    THERMOPLASTIC MOULDING MASS 未知

    公开(公告)号：DE3364835D1

    公开(公告)日：1986-09-04

    申请号：DE3364835

    申请日：1983-03-04

    Applicant: BASF AG

    Inventor： POHRT JUERGEN ,  MATERN RUEDIGER ,  JENNE HELMUT DR ,  GAUSEPOHL HERMANN DR ,  GERBERDING KARL DR

    IPC: C08L53/02

    Abstract: A thermoplastic molding material comprises copolymers I and II. Copolymer I is a high-impact (graft) copolymer which is derived from a monovinyl-aromatic monomer and a polymer or copolymer predominantly containing polymerized 1,3-diene units, and is present in a proportion of 0.1-1.0% by weight, based on the molding material. Copolymer II is a block copolymer with star-shaped branching, ie. a radial block copolymer, having an average of more than two branches per molecule. It is substantially derived from 55-80% by weight of a monovinyl-aromatic monomer and 20-45% by weight of a 1,3-diene monomer. The molding material may contain conventional assistants and is used for the production of blown film.

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