1, 3, 7-OCTATRIENE POLYMER, HYDRIDE THEREOF, AND METHOD FOR PRODUCING SAID POLYMER

• US 20190330393A1
• Filed: 12/28/2017
• Published: 10/31/2019
• Est. Priority Date: 12/28/2016
• Status: Active Grant

• Current Assignee: Kuraray Company Limited
• Original Assignee: Kuraray Company Limited
• Inventors: SUNAGA, Shuichi, TSUJI, Tomoaki, HORI, Takashi, INUBUSHI, Yasutaka
• Granted Patent: US 11,198,744 B2
• Time in Patent Office: Days
• CPC Class Codes: C08C 19/02 Hydrogenation
• CPC Class Codes: C08F 136/22 the radical having three or more carbon-to-carbon double bonds
• CPC Class Codes: C08F 2/38 Polymerisation using regulators, e.g. chain terminating agents , e.g. telomerisation
• CPC Class Codes: C08F 36/22 the radical having three or more carbon-to-carbon double bonds
• CPC Class Codes: C08F 4/48 selected from lithium, rubidium, caesium or francium C08F4/461 takes precedence
• CPC Class Codes: C08F 8/04 Reduction, e.g. hydrogenation

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.

Claims

1. :

A polymer comprising 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.

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, wherein the structural unit derived from 1,3,7-octatriene is contained in an amount of 95 mol % or more.

7. :

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

8. :

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

9. :

A hydride of the polymer according to claim 1.

10. :

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, of more than 98.0% to anionic polymerization, 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.

11. :

The method according to claim 10, 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.

12. :

The method according to claim 10, wherein the purity of the 1,3,7-octatriene as determined by gas chromatography is 99.0% or more.

13. :

The method according to claim 10, wherein the anionic polymerization is carried out in the presence of a Lewis base.

14. :

The method according to claim 13, 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.

15. :

The method according to claim 13, 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.

16. :

The method according to claim 13, wherein the Lewis base is a compound having one atom having an unshared electron pair.

17. :

The method according to claim 13, wherein the Lewis base is a compound having two or more atoms having an unshared electron pair.

18. :

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

19. :

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

20. :

The method according to claim 10, wherein the anionic polymerization is carried out at −

50 to 200°

C.

21. :

The method according to claim 10, 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.

22. :

The method according to claim 10, 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.