Process for preparing a block copolymer
AssigneeBridgestone Corporation
InventorsYoichi Ozawa, Ryota Fujio
Life of this patent
Estimating the term…
Abstract
A block copolymer containing a non-polar polymer block and a polar polymer block was prepared by using an anionic polymerization initiator, by reacting an organic compound which can form an ate complex at the active end of the non-polar polymer block, the compound which contains a main group element of II or III group, before the addition of the polar monomer.
Claims25
A process for preparing a block copolymer comprising the steps of:
- (A) polymerizing a non-polar monomer in the presence of an anionic initiator to form a non-polar polymer block having an active end, wherein an organic compound, which contains a main group element of group II or III, is reacted with said active end to form an ate complex during or after formation of the non-polar polymer block;
- and
- (B) reacting a polar monomer with said ate complex to form a polar polymer block.
A process for preparing a block copolymer comprising the steps of:
- (A) polymerizing a non-polar monomer in the presence of an anionic initiator to form a non-polar polymer block having an active end, wherein an organic compound of the formula M.sup.1 R.sup.1 R.sup.2, wherein M.sup.1 is a main element of group II, each of R.sup.1 and R.sup.2 is selected from the group consisting of an aliphatic hydrocarbon compound of 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon compound of 2 to 20 carbon atoms, and an aromatic hydrocarbon compound of 6 to 20 carbon atoms, is reacted with said active end to form an ate complex during or after formation of the non-polar polymer block;
- and
- (B) reacting a polar monomer with said ate complex to form a polar polymer block.
A process for preparing a block copolymer comprising the steps of:
- (A) polymerizing a non-polar monomer in the presence of an anionic initiator to form a non-polar polymer block having an active end, wherein an organic compound of the formula M.sup.1 R.sup.1 R.sup.2, wherein M.sup.1 is magnesium or zinc, each of R.sup.1 and R.sup.2 is selected from the group consisting of an aliphatic hydrocarbon compound of 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon compound of 2 to 20 carbon atoms, and an aromatic hydrocarbon compound of 6 to 20 carbon atoms, is reacted with said active end to form an ate complex during or after formation of the non-polar polymer block;
- and
- (B) reacting a polar monomer with said ate complex to form a polar polymer block.
The process in accordance with claim 16, wherein the initiator is selected from the group consisting of a reaction product of diisopropenylbenzene and n-butyllithium and a reaction product of diisopropenylbenzene and sec-butyllithium.
Dependencies are inferred from the claim text.