US 2009/0023874 A1 · PROCESS FOR PRODUCING RING-OPENING METATHESIS POLYMER

Abstract

The process of producing a ring-opening metathesis polymer of the present invention is mainly characterized in that a treatment to decrease the amount of oxygen and/or peroxide in at least one kind of polymerization starting material is performed prior to the ring-opening metathesis polymerization reaction of a cyclic olefin performed in the presence of a ruthenium carbene complex (catalyst). As used herein, the “polymerization starting material” refers to various materials used for a ring-opening metathesis polymerization reaction and present in the reaction system, such as ruthenium carbene complex (catalyst) and cyclic olefin (monomer), as well as solvents, chain transfer agents and the like. In addition, the method for a treatment to decrease the amount of oxygen and/or peroxide include a method comprising applying an adsorbent to a polymerization starting material to remove oxygen and/or peroxide by adsorption, a method comprising applying an antioxidant to a polymerization starting material to decompose oxygen or peroxide and the like. According to the present invention, a ring-opening metathesis polymer can be produced at a higher reaction rate without degrading the high activity inherently possessed by a ruthenium carbene complex (catalyst). Because of being free of a decrease in the concentration of the catalyst maintaining the high activity during reaction, the thus-obtained polymer shows a small difference between polymerization lots and becomes homogeneous, and a polymer having a comparatively sharp molecular weight distribution can be produced.

Claims15

Dependent claims

A process of producing a ring-opening metathesis polymer, which comprises subjecting, in the presence of a ruthenium carbene complex, at least one kind of cyclic olefin selected from a cyclic monoolefin represented by the following formula (1):

wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are each a hydrogen atom, a halogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted aryl group, a hydroxyl group, an alkoxy group, a carbonyl group, an ester group or a carboxyl group or a salt thereof, wherein any plural members thereof optionally form a cyclic structure together with carbon atoms bonded thereto, and m and n are each an integer of 0 to 4, wherein the total number of m and n is not less than 3, and a cyclic diolefin represented by the following formula (2):
wherein R11, R12, R13, R14, R15, R16, R17 and R18 are each a hydrogen atom, a halogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted aryl group, a hydroxyl group, an alkoxy group, a carbonyl group, an ester group or a carboxyl group or a salt thereof, wherein any plural members thereof optionally form a cyclic structure together with carbon atoms bonded thereto, and p and q are each an integer of 0 to 4, wherein the total number of p and q is not less than 3, to a ring-opening metathesis polymerization reaction, wherein a treatment to decrease the amount of oxygen and/or peroxide in at least one kind of polymerization starting material is performed before the ring-opening metathesis polymerization reaction.

Dependencies are inferred from the claim text.

Process for producing ring-opening metathesis polymer

Life of this patent

Process for producing ring-opening metathesis polymer

Life of this patent

Abstract

Claims15