Molded product comprising polarized olefin-based polymer and property thereof

Patent metadata

Field	Value
Publication number	US-12291585-B2
Application number	US-202217989280-A
Country	US
Kind code	B2
Filing date	Nov 17, 2022
Priority date	Mar 14, 2018
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

The object of the invention is to provide a novel olefin-based molded product useful for various applications.
An olefin-based molded product comprising a polymer including a structural unit of at least one polar olefin monomer represented by the general formula (I) CH 2 ═CH—R 2 —Z(R 1 ) n is provided. In the formula, Z is a hetero atom selected from the group consisting of nitrogen, oxygen, phosphorus, sulfur, and selenium; R 1 is a substituted or unsubstituted hydrocarbyl group having 1 to 30 carbon atoms; n is an integer of 1 or 2 depending on the atomic species of Z; and R 2 is a substituted or unsubstituted hydrocarbylene group having 2 to 20 carbon atoms.

First claim

The invention claimed is:

1. An olefin-based molded product comprising a copolymer comprising a structural unit of at least one polar olefin monomer (A) and a structural unit of at least one nonpolar olefin monomer (B),
the copolymer comprises 30 mol % or more in the total sequences of the copolymer of alternating (A)-(B) sequence in which the structural units of (A) and (B) are aligned alternatingly, and -(B)-(B)- sequence which is the polymerization sequence of (B), where structural units of two or more kinds of nonpolar olefin monomers are included, a random copolymer, an alternating copolymer, a block copolymer, or another ordered copolymer constituted with structural units of two or more kinds of nonpolar olefin monomers is also included as the -(B)-(B)- sequence.

2. The olefin-based molded product according to claim 1 , wherein the proportion of the alternating (A)-(B) sequence in the total sequences of the copolymer is 40 mol % or more,
and wherein the proportion of the -(B)-(B)- sequence in the total sequences of the copolymer is 60 mol % or less.

3. The olefin-based molded product according to claim 1 , the olefin-based molded product has crystalline nanodomain derived from the -(B)-(B)- sequence.

4. The olefin-based molded product according to claim 1 , wherein the proportion of the polar olefin structural unit in the total structural units in the polymer is 20 mol % or more.

5. The olefin-based molded product according to claim 1 , wherein the number average molecular weight of the polymer is 2.0×10 3 or more.

6. The olefin-based molded product according to claim 1 , which is used as a self-healing material, or which is used as a shape-memory material.

7. The olefin-based molded product according to claim 1 , wherein a self-healing rate of the olefin-based molded product is 80% or more within 5 days.

8. The olefin-based molded product according to claim 7 , wherein a shape fixed rate and a shape recovery rate of the olefin-based molded product is 80% or more.

Assignees

• Riken

Inventors

• Wang Haobing
• Yang Yang
• Nishiura Masayoshi
• Hou Zhaomin

Classifications

• C08F212/30

  Sulfur · CPC title

• C08F212/22

  Oxygen · CPC title

• C08F212/28

  Amines · CPC title

• C08F212/14

  substituted by heteroatoms or groups containing heteroatoms · CPC title

• C08F2500/27

  Amount of comonomer in wt% or mol% · CPC title