Thermoplastic polymers synthesized from depolymerized lignin via free radical polymerization

Patent metadata

Field	Value
Publication number	US-2025026877-A1
Application number	US-202418895771-A
Country	US
Kind code	A1
Filing date	Sep 25, 2024
Priority date	Feb 1, 2019
Publication date	Jan 23, 2025
Grant date	—

Abstract

One aspect of the present application relates to a method of synthesizing a thermoplastic polymer. This method includes providing a depolymerized lignin product comprising monomers and oligomers and producing lignin (meth)acrylate monomers and oligomers from the depolymerized lignin product. A thermoplastic lignin (meth)acrylate polymer is then formed by free radical polymerization of the lignin (meth)acrylate monomers and oligomers. The present application also relates to a branched chain thermoplastic lignin (meth)acrylate polymer which includes a chain transfer agent. The thermoplastic lignin based polymers of the present application can be used to prepare carbon fibers, and engineering thermoplastics. Mixtures of lignin (meth)acrylate monomers and oligomers are also disclosed.

First claim

1 .- 16 . (canceled)

17 . A branched chained thermoplastic lignin (meth)acrylate polymer comprising a chain transfer agent.

18 . The thermoplastic polymer of claim 17 , wherein said chain transfer agent is a thiocarbonylthio compound, a dithioester compound, a trithiocarbonate compound, a dithiocarbamate compound, or a xanthate compound capable of reversible association with polymerizable free radicals.

19 . The thermoplastic polymer of claim 18 , wherein the trithiocarbonate chain transfer agent is ethyl (3-oxobutan-2-yl) carbonotrithioate, or 2-cyanopropan-2-yl methyl carbonotrithioate.

20 . The thermoplastic polymer of claim 17 , wherein said polymer is a lignin methacrylate polymer.

21 . The thermoplastic polymer of claim 17 , wherein said polymer is a lignin acrylate polymer.

22 . The thermoplastic polymer of claim 17 , wherein said lignin (meth)acrylate polymer has a T g ranging from 0° C. to 300° C.

23 . The thermoplastic polymer of claim 17 , wherein said lignin (meth)acrylate polymer has a number averaged molecular weight ranging from 1 kDa to 10,000 kDa.

24 . The thermoplastic polymer of claim 17 , wherein said lignin (meth)acrylate polymer has an amount of fixed carbon ranging from 1% to 50%.

25 . (canceled)

26 . An engineering thermoplastic composition comprising the thermoplastic polymer of claim 17 .

27 .- 30 . (canceled)

Assignees

• Univ Iowa State Res Found Inc

Inventors

• Cochran Eric W
• Bai Xianglan
• Qu Wangda
• Huang Yuerui
• Luo Yixin

Classifications

• D01F11/122

  Oxygen, oxygen-generating compounds (anode oxidising D01F11/16) · CPC title

• C08F2438/01

  Atom Transfer Radical Polymerization [ATRP] or reverse ATRP · CPC title

• C08F2438/03

  Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX] · CPC title

• D01F11/125

  Carbon · CPC title

• C08J2397/02

  Lignocellulosic material, e.g. wood, straw or bagasse · CPC title