Ring opening metathesis catalyst systems for cyclic olefin polymerization

Patent metadata

Field	Value
Publication number	US-12552878-B2
Application number	US-202117906249-A
Country	US
Kind code	B2
Filing date	Mar 10, 2021
Priority date	Mar 19, 2020
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

An improved catalyst for cyclic olefin polymerization. The catalyst includes a transition metal carbene having the following structure: M v (OR′) c*m X (v-c*m-2) ═C(R*) 2 wherein M v is a Group 5 transition metal having a valence (v) of 5 or a Group 6 transition metal having a valence (v) of 5 or 6; each R′ is independently a monovalent organic moiety comprising from 8 to 40 atoms selected from Groups 14-17; c is an integer from 1 to 3; m is 1/3, 1/2, 1, 3/2, 2, 3, or 4 and c*m≤v−2; X is a halogen; and each R* is independently H or a C 1 to C 7 alkyl. The catalyst is particularly useful for ring-opening metathesis polymerization (ROMP).

First claim

What is claimed is:

1 . A catalyst for cyclic olefin polymerization, comprising a transition metal carbene having the following structure (V):
M v (OR′) c*m X (v-c*m-2) ═C(R*) 2   (V), wherein:
M v is a Group 5 transition metal having a valence, v, of 5 or a Group 6 transition metal having a valence (v) of 5 or 6; OR′ is 4-benzylphenolate or 4-(diphenylamino)phenolate; each R′ is independently a monovalent organic moiety comprising from 8 to 40 atoms selected from Groups 14-17; c is an integer from 1 to 3; m is 1/3, 1/2, 1, 3/2, 2, 3, or 4 and c*m≤v−2; X is a halogen; and each R* is independently H or a C 1 to C 7 alkyl,
wherein the catalyst comprises a ring opening metathesis reaction product of
A) at least one metal alkoxide (I) having the formula: m (R′O) c M u X (u-c) , and
B) at least one transition metal halide (II) having the formula: M v X v to form a reaction product,

wherein,
M u is a Group 1, 2, or 13 metal of valence u, and
the reaction product includes a ligand exchange involving the at least one metal alkoxide (I) that had been activated with a metal alkyl activator.

2 . The catalyst according to claim 1 , wherein v is 6, M v is tungsten (W), X is chlorine or fluorine, and each R′ is an aromatic.

Assignees

• Exxonmobil Chemical Patents Inc

Inventors

• Zabula Alexander V
• Luo Lubin
• Halbach Robert L
• Canich Jo Ann M
• Lopez-Barron Carlos R
• Galuska Alan A

Classifications

• C08F32/04

  having one carbon-to-carbon double bond · CPC title

• B01J2540/40

  Non-coordinating groups comprising nitrogen · CPC title

• B01J31/2226

  Anionic ligands, i.e. the overall ligand carries at least one formal negative charge · CPC title

• B01J2231/543

  alkene metathesis · CPC title

• B01J2231/54

  Metathesis reactions, e.g. olefin metathesis · CPC title