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    52.
    发明专利
    未知

    公开(公告)号：DE69415935T2

    公开(公告)日：1999-06-02

    申请号：DE69415935

    申请日：1994-11-14

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： TREPKA WILLIAM J ,  STACY NATHAN E ,  MOCZYGEMBA GEORGE A ,  FARRAR JR RALPH C

    IPC: C08F8/44 ,  C08F297/02 ,  C08F297/04 ,  C08G81/02 ,  C08L25/04 ,  C08L25/06 ,  C08L53/02

    Abstract: A method of preparing a polymer under solution polymerization conditions in a reaction zone comprising: (a) charging a monovinylaromatic monomer and an initiator in the presence of a randomizer; thereafter (b) charging an initiator and a monovinylaromatic monomer; thereafter (c) charging a mixture of a monovinylaromatic monomer and conjugated diene monomer; thereafter (d) optionally charging a mixture of monovinylaromatic monomer and conjugated diene monomer; and thereafter (e) charging the reaction mixture with a coupling agent, wherein in each of steps (a) and (d) polymerization is conducted until essentially no free monomer is present.

    53.
    发明专利
    未知

    公开(公告)号：ES2126045T3

    公开(公告)日：1999-03-16

    申请号：ES94117957

    申请日：1994-11-14

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： TREPKA WILLIAM J ,  STACY NATHAN E ,  MOCZYGEMBA GEORGE A ,  FARRAR JR RALPH C

    IPC: C08F8/44 ,  C08F297/02 ,  C08F297/04 ,  C08G81/02 ,  C08L25/04 ,  C08L25/06 ,  C08L53/02

    Abstract: A method of preparing a polymer under solution polymerization conditions in a reaction zone comprising: (a) charging a monovinylaromatic monomer and an initiator in the presence of a randomizer; thereafter (b) charging an initiator and a monovinylaromatic monomer; thereafter (c) charging a mixture of a monovinylaromatic monomer and conjugated diene monomer; thereafter (d) optionally charging a mixture of monovinylaromatic monomer and conjugated diene monomer; and thereafter (e) charging the reaction mixture with a coupling agent, wherein in each of steps (a) and (d) polymerization is conducted until essentially no free monomer is present.

    TAPERED BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES
    55.
    发明专利
    TAPERED BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES 未知

    公开(公告)号：CA2134026C

    公开(公告)日：1998-06-09

    申请号：CA2134026

    申请日：1994-10-21

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： TREPKA WILLIAM J ,  MOCZYGEMBA GEORGE A ,  STACY NATHAN E ,  FARRAR RALPH C JR

    IPC: C08F8/44 ,  C08F297/02 ,  C08F297/04 ,  C08G81/02 ,  C08L25/04 ,  C08L25/06 ,  C08L53/02

    Abstract: A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; and (4) a coupling agent; to produce a polymodal tapered block copolymer. In a second embodiment of the invention tapered block copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and monovinylaromatic monomers; (3) a mixture of monovinylaromatic and conjugated diene monomers; (4) a mixture of monovinylaromatic and conjugated diene monomers; and (5) a coupling agent; to produce a polymodal tapered block copolymer. The invention copolymers and blends of the invention copolymers with polymers of styrene are particularly useful for applications such as packaging and food or drink containers which require transparency, low blueness, colorlessness, good impact strength and ductility.

    TAPERED BLOCK STYRENE/BUTADIENE COPOLYMERS
    56.
    发明专利
    TAPERED BLOCK STYRENE/BUTADIENE COPOLYMERS 未知

    公开(公告)号：CA2052387C

    公开(公告)日：1996-09-17

    申请号：CA2052387

    申请日：1991-09-27

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： MOCZYGEMBA GEORGE A ,  TREPKA WILLIAM J

    IPC: C08F297/04

    Abstract: A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the first monomer to produce a polymodal tapered block copolymer. Suitable monomers include conjugated dienes and monovinylaromatic compounds. The copolymers are particularly useful for applications requiring environmental stress crack resistance.

    57.
    发明专利
    未知

    公开(公告)号：NO944630L

    公开(公告)日：1995-06-06

    申请号：NO944630

    申请日：1994-12-01

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： MOCZYGEMBA GEORGE A ,  KNIGHT NANCY R ,  TREPKA WILLIAM J ,  STACY NATHAN E

    IPC: C08F297/02 ,  C08F297/04

    Abstract: A copolymer is prepd. in a reaction zone by: (a) introducing a monovinylaromatic monomer and an initiator in the presence of a randomiser and polymerising until no free monomer is present; (b) adding an initiator and a monovinylaromatic monomer and polymerising until no free monomer is present; (c) adding a mixt. of monovinylaromatic monomer and conjugated diene and polymerising until no free monomer is present; (d) adding a mixt. of monovinylaromatic monomer and conjugated diene monomer and polymerising until no free monomer is present; (e) adding a conjugated diene monomer and allowing complete polymerisation to occur until no free monomer is present; and (f) adding a coupling agent. Only two initiator charges are present and are added in steps (a) and (b). Also claimed are (i) polymodal copolymers produced by the method; (ii)-articles made from the copolymers, and (ii) a polymodal coupled block copolymer having chains resulting from coupling; S-S-B/S-B/S-B-Li S-B/S-B/S-B-Li S = monovinyl aromatic block; B = conjugated diene block; B/S = tapered B and S block; and Li = living polymer or coupling site.

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