1,3, 7-octatriene polymer, hydride thereof, and method for producing said polymer

Patent metadata

Field	Value
Publication number	US-11198744-B2
Application number	US-201716468217-A
Country	US
Kind code	B2
Filing date	Dec 28, 2017
Priority date	Dec 28, 2016
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

The present invention provides a 1,3,7-octatriene polymer having a narrow molecular weight distribution and a hydride thereof. Specifically, the 1,3,7-octatriene polymer is a polymer containing a structural unit derived from 1,3,7-octatriene, wherein the polymer has not only a molecular weight distribution (Mw/Mn) of 2.05 or less but also a weight average molecular weight (Mw) of 1,000 to 1,000,000.

First claim

The invention claimed is:

1. A polymer, comprising:
95 mol % or more of a structural unit derived from 1,3,7-octatriene;
wherein
a content ratio of 1,2-bond relative to all binding modes is 35 to 65 mol %,
a molecular weight distribution (Mw/Mn) of the polymer is 2.05 or less, and
a weight average molecular weight (Mw) of the polymer is from 1,000 to 1,000,000.

2. The polymer according to claim 1 , wherein the weight average molecular weight (Mw) is from 4,000 to 500,000.

3. The polymer according to claim 1 , wherein the weight average molecular weight (Mw) is from 7,000 to 200,000.

4. The polymer according to claim 1 , wherein the weight average molecular weight (Mw) is from 13,000 to 200,000.

5. The polymer according to claim 1 , wherein the molecular weight distribution (Mw/Mn) is 1.80 or less.

6. The polymer according to claim 1 , not having a living anionic active species at a molecular end thereof.

7. The polymer according to claim 1 , having a living anionic active species at a molecular end thereof.

8. A hydrogenated polymer obtained by hydrogenation of the polymer of claim 1 .

9. A method of producing a polymer containing a structural unit derived from 1,3,7-octatriene, the method comprising:
subjecting 1,3,7-octatriene having a purity, as determined by gas chromatography, more than 98.0% to anionic polymerization, wherein
a molecular weight distribution (Mw/Mn) of the polymer is 2.05 or less, and
a weight average molecular weight (Mw) of the polymer is from 1,000 to 1,000,000.

10. The method according to claim 9 , wherein impurities which is optionally contained in the 1,3,7-octatriene comprises at least one selected from the group consisting of a peroxide and a decomposition product of the peroxide, and a total content of the peroxide and the decomposition product in the 1,3,7-octatriene is 0.30 mmol/kg or less.

11. The method according to claim 9 , wherein the purity of the 1,3,7-octatriene as determined by gas chromatography is 99.0% or more.

12. The method according to claim 9 , wherein t anionic polymerization is carried out in the presence of a Lewis base.

13. The method according to claim 12 , wherein a molar ratio of the Lewis base to a polymerization initiator used for the anionic polymerization [(Lewis base)/(polymerization initiator)] is from 0.01 to 1,000.

14. The method according to claim 12 , wherein the Lewis base is a compound having at least one selected from the group consisting of an ether bond and a tertiary amino group in a molecule thereof.

15. The method according to claim 12 , wherein the Lewis base is a compound having one atom having an unshared electron pair.

16. The method according to claim 12 , wherein the Lewis base is a compound having two or more atoms having an unshared electron pair.

17. The method according to claim 16 , wherein the Lewis base has multidentate properties.

18. The method according to claim 9 , wherein a solid content concentration of a reaction liquid obtained after completion of the anionic polymerization is from 10 to 80% by mass.

19. The method according to claim 9 , wherein the anionic polymerization is carried out at −50 to 200° C.

20. The method according to claim 9 , wherein a conversion of the 1,3,7-octatriene after completion of the anionic polymerization, as determined by gas chromatography, is 80.0% or more.

21. The method according to claim 9 , wherein a conversion of the 1,3,7-octatriene after completion of the anionic polymerization, as determined by gas chromatography, is 97.0% or more.

22. The polymer according to claim 1 , wherein the weight average molecular weight (Mw) of the polymer is from 33,000 to 1,000,000.

Assignees

• Kuraray Co

Inventors

• Sunaga Shuichi
• Tsuji Tomoaki
• Hori Takashi
• Inubushi Yasutaka

Classifications

• C08F36/22 Primary

  the radical having three or more carbon-to-carbon double bonds · CPC title

• C08F8/04

  Reduction, e.g. hydrogenation · CPC title

• C08F2/38

  Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation} · CPC title

• C08F136/22 Primary

  the radical having three or more carbon-to-carbon double bonds · CPC title

• C08C19/02

  Hydrogenation · CPC title