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    BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES AND PREPARATION THEREOF
    61.
    发明专利
    BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES AND PREPARATION THEREOF 未知

    公开(公告)号：CA2117708C

    公开(公告)日：2002-10-22

    申请号：CA2117708

    申请日：1994-09-20

    Applicant: PHILLIPS PETROLEUM CO

    Inventor： TREPKA WILLIAM J ,  MOCZGEMBA GEORGE A ,  NASH LARRY L ,  DEPORTER CRAIG D ,  STACY NATHAN E ,  FARRAR RALPH C ,  SELMAN CHARLES M

    IPC: C08F297/04 ,  C08F297/00

    Abstract: A method for preparing resinous polymodal monovinylarene-conjugated diene block copolymers and polymers produced thereby are provided. The method comprises sequentially contacting under polymerization conditions: (a) a monovinylarene monomer and initiator; (b) initiator and a monovinylarene monomer; (c) a sequence of at least two charges selected from the group consisting of (i) initiator and a monovinylarene monomer, (ii) a mixture of monovinylarene monomer and conjugated diene monomer, (iii) a conjugated diene monomer, (iv) a monovinylarene monomer; (d) a coupling agent; wherein the sequence of at least two charges in step (c) can be made in any order. In a preferred embodiment, at least three initiator charges are provided. In another preferred embodiment, at least three monovinylarene charges precede the first charge containing conjugated diene. In another preferred embodiment, at least four monovinylarene charges precede the first charge containing conjugated diene.

    63.
    发明专利
    未知

    公开(公告)号：DE69413931D1

    公开(公告)日：1998-11-19

    申请号：DE69413931

    申请日：1994-12-01

    Applicant: PHILLIPS PETROLEUM CO

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

    IPC: C08F297/02 ,  C08F297/04 ,  C08G81/02 ,  C08L53/02

    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.

    64.
    发明专利
    未知

    公开(公告)号：AT172211T

    公开(公告)日：1998-10-15

    申请号：AT94118996

    申请日：1994-12-01

    Applicant: PHILLIPS PETROLEUM CO

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

    IPC: C08F297/02 ,  C08F297/04 ,  C08G81/02 ,  C08L53/02

    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.

    TAPERED BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES
    66.
    发明专利
    TAPERED BLOCK COPOLYMERS OF MONOVINYLARENES AND CONJUGATED DIENES 未知

    公开(公告)号：CA2134027A1

    公开(公告)日：1995-06-03

    申请号：CA2134027

    申请日：1994-10-21

    Applicant: PHILLIPS PETROLEUM CO

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

    IPC: C08F297/02 ,  C08F297/04 ,  C08L53/02 ,  C08L25/04

    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.

    Tapered Block Copolymers of Conjugated Dienes and Monovinylarenes
    67.
    发明专利
    Tapered Block Copolymers of Conjugated Dienes and Monovinylarenes 未知

    公开(公告)号：CA2060020A1

    公开(公告)日：1992-11-09

    申请号：CA2060020

    申请日：1992-01-28

    Applicant: PHILLIPS PETROLEUM CO

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

    IPC: C08F297/04 ,  C08F295/00

    Abstract: A method for preparing tapered block copolymers in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and a mixture of monovinylaromatic and conjugated diene monomers; (3) an initiator and a mixture of monovinylaromatic and conjugated diene monomers; and (4) a coupling agent to produce a polymodal tapered block copolymer. The copolymers are particularly useful for packaging applications which require good environmental stress crack resistance.

    TAPERED BLOCK STYRENE/BUTADIENE COPOLYMERS
    68.
    发明专利
    TAPERED BLOCK STYRENE/BUTADIENE COPOLYMERS 未知

    公开(公告)号：CA2028410A1

    公开(公告)日：1991-07-03

    申请号：CA2028410

    申请日：1990-10-24

    Applicant: PHILLIPS PETROLEUM CO

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

    IPC: C08F297/04 ,  C08J5/18 ,  C08F295/00

    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 second monomer alternating 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 shrink film packaging applications.

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