公开(公告)号：CA2117708A1

公开(公告)日：1995-03-31

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.

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.