Method for producing cyclic olefin copolymer, cyclic olefin copolymer, crosslinked product, film, or sheet, laminate, circuit board, electronic device, and prepreg

JPWO2024004882A5Active Publication Date: 2025-03-21MITSUI CHEMICALS INC
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Patent Information

Application Number
JP2024530788
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-23
Filing Date
2023-06-23
Publication Date
2025-03-21
Estimated Expiration
2043-06-23

AI Technical Summary

Technical Problem

Cyclic olefin copolymers with crosslinkable groups face limitations in solvent solubility, which impairs varnish management and stable impregnation during circuit board production, despite showing improvements in heat resistance and fluidity.

Method used

A method for producing cyclic olefin copolymers with a balanced heat resistance and solvent solubility is developed by copolymerizing olefins, cyclic nonconjugated dienes, and cyclic olefins in the presence of a transition metal catalyst, optimizing the composition and catalyst removal to enhance the polymer's properties.

Benefits of technology

The method results in cyclic olefin copolymers with improved heat resistance and solvent solubility, leading to better impregnability and dielectric property stability, mechanical properties, and gas barrier properties in crosslinked products.

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Abstract

A method for producing a cyclic olefin copolymer, wherein the method for producing a cyclic olefin copolymer is characterized in that the cyclic olefin copolymer contains (A) one or more repeating units derived from an olefin, (B) one or more repeating units derived from a cyclic unconjugated diene, and (C) one or more repeating units derived from a cyclic olefin; the glass transition temperature of the cyclic olefin copolymer measured by differential scanning calorimetry (DSC) is 100°C or higher; the method includes a polymerization step that copolymerizes the olefin, cyclic unconjugated diene, and cyclic olefin in the presence of a catalyst for olefin polymerization containing a transition metal compound (A) and a compound (B); the transition metal compound (A) contains one or more selected from the group consisting of transition metal compounds (A-1) and transition metal compounds (A-2); and the compound (B) contains one or more selected from the group consisting of organic metal compounds (B-1), organic aluminum oxy compounds (B-2), and compounds (B-3) that react with the transition metal compound (A) to form an ion pair.
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