Norbornene polymer and process for preparing the same
AssigneeNippon Zeon Co., Ltd.
InventorJunji Kodemura
Life of this patent
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Abstract
The invention relates to a norbornene polymer containing repeating units formed from a norbornene monomer in its main chain and having a weight average molecular weight (Mw) ranging from 10,000 to 1,000,000 and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) ranging from 1.60 to 1.95, and a production process thereof.
Claims14
A norbornene polymer which is a ring-opening (co)polymer of a norbornene monomer, or a hydrogenated product thereof, wherein said norbornene polymer has a weight average molecular weight (Mw) ranging from 30,000 to 70,000, a ratio (Mw/Mn) of the weight average molecular weight (Mw) to number average molecular weight (Mn) ranging from 1.60 to 1.90, and a residual metal content of 10 ppm or lower.
A process for producing a norbornene polymer by polymerizing a norbornene monomer in the presence of a metathesis catalyst system comprising:
- (1) at least one transition metal compound selected from the group consisting of W compounds, Mo compounds and Re compounds;
- (2) an organoaluminum compound;
- and
- (3) an alcohol having at least 2 carbon atoms, wherein the sum total of the number of carbon atoms in the organic residue of the organoaluminum compound and the number of carbon atoms in the alcohol is at least 9, the process comprising the following steps (i) to (iii):
- (i) mixing the organoaluminum compound with the alcohol, and then mixing at least a part of the norbornene monomer therewith,
- (ii) adding at least a part of the transition metal compound to initiate polymerization, and
- (iii) adding a mixture of any remaining norbornene monomer and transition metal compound to continue the polymerization.
A process for producing a norbornene polymer by polymerizing a norbornene monomer in the presence of a metathesis catalyst system comprising:
- (1) at least one transition metal compound selected from the group consisting of W compounds, Mo compounds and Re compounds;
- (2) an organoaluminum compound;
- and
- (3) an alcohol having at least 2 carbon atoms, wherein the sum total of the number of carbon atoms in the organic residue of the organoaluminum compound and the number of carbon atoms in the alcohol is at least 9, the process comprising the following steps (i) and (ii):
- (i) mixing the organoaluminum compound, the alcohol, a part of the norbornene monomer and a part of the transition metal compound with one another in the recited order, and
- (ii) adding the remaining norbornene monomer and transition metal compound to conduct polymerization.
A process for producing a norbornene polymer by polymerizing a norbornene monomer in the presence of a metathesis catalyst system comprising:
- (1) at least one transition metal compound selected from the group consisting of W compounds, Mo compounds and Re compounds;
- (2) an organoaluminum compound;
- (3) an alcohol;
- and
- (4) an oxygen-containing organic compound other than the alcohol, the process comprising the following steps (i) to (iii):
- (i) mixing the organoaluminum compound with the alcohol and the oxygen-containing organic compound other than the alcohol, and then mixing at least a part of the norbornene monomer therewith,
- (ii) adding at least a part of the transition metal compound to initiate polymerization, and
- (iii) adding a mixture of any remaining norbornene monomer and transition metal compound to continue the polymerization.
A process for producing a norbornene polymer by polymerizing a norbornene monomer in the presence of a metathesis catalyst system comprising:
- (1) at least one transition metal compound selected from the group consisting of W compounds, Mo compounds and Re compounds;
- (2) an organoaluminum compound;
- (3) an alcohol;
- and
- (4) an oxygen-containing organic compound other than the alcohol, the process comprising the following steps (i) and (ii):
- (i) mixing the organoaluminum compound, the alcohol, the oxygen-containing organic compound other than the alcohol, a part of the norbornene monomer and a part of the transition metal compound with one another in the recited order, and
- (ii) adding the remaining norbornene monomer and transition metal compound to conduct polymerization.
A molding material comprising (A) norbornene polymer which is a ring-opening (co)polymer of a norbornene monomer, or a hydrogenated product thereof, wherein said norbornene polymer has a weight average molecular weight (Mw) ranging from 30,000 to 70,000, a ratio (Mw/Mn) of the weight average molecular weight (Mw) to number average molecular weight (Mn) ranging from 1.60 to 1.90, and a residual metal content of 10 ppm or lower, and (B) a stabilizer.
Dependencies are inferred from the claim text.