A composition comprising lignin and epoxy compound for coating and method for the manufacturing thereof and use thereof

Patent metadata

Field	Value
Publication number	US-2016208134-A1
Application number	US-201415024930-A
Country	US
Kind code	A1
Filing date	Sep 25, 2014
Priority date	Sep 27, 2013
Publication date	Jul 21, 2016
Grant date	—

Abstract

The present invention relates to a composition for coating, in particular a composition comprising lignin and one or more epoxy-group containing compounds, and methods for the manufacturing thereof and uses thereof. The present invention also relates to products obtainable by said methods and uses thereof.

First claim

1 . A composition for coating, comprising lignin and one or more epoxy-group containing compounds.

2 . A composition according to claim 1 comprising lignin, a catalyst and an epoxy-group containing compound.

3 . A composition according to claim 1 also comprising one or more solvents.

4 . A composition according to claim 1 , wherein the solvent is an organic or aqueous solvent or combinations thereof.

5 . A composition according to claim 2 , wherein the catalyst is a base.

6 . A composition according to claim 1 , wherein the epoxy-group containing compound is selected from the group consisting of epichlorohydrin (ECH), poly(ethylene glycol) diglycidyl ether (PEGDGE), bisphenol A-epichlorohydrin and combinations thereof.

7 . A composition according to claim 1 , wherein the lignin is a modified lignin which has been modified through alkoxylation, ozonolysis, phenolation or hydroxymethylation.

8 . (canceled)

9 . A method for manufacturing a composition for coating, comprising the following steps:
i) providing a lignin or a modified lignin, ii) adding a solvent, iii) adding an epoxy-group containing compound, iv) mixing and heating said components, v) adding a catalyst and vi) mixing the lignin, epoxy compound, solvent and catalyst, thus providing a composition.

10 . A method according to claim 9 , wherein the solvent of step ii) also comprises a catalyst.

11 . A method according to claim 9 preceded by the following steps:
a) providing a lignin or a modified lignin,
b) adding a solvent,
c) heating the mixture and adding an oxide,
d) adjusting the pH and optionally
e) filtering, washing and freeze-drying the oxide-modified lignin obtained.

12 . A method according to claim 9 preceded by the following steps:
A1) providing a lignin or a modified lignin,
B1) adding a solvent,
C1) heating the mixture and adding formaldehyde,
D1) adjusting the pH and optionally
E1) filtering, washing and freeze-drying the hydroxymethylated lignin obtained.

13 . A method according to claim 9 preceded by the following steps:
A2) providing a lignin or a modified lignin,
B2) adding a solvent,
C2) heating the mixture and treat it with ozone,
D2) adjusting the pH and optionally
E2) filtering, washing and freeze-drying the ozonolyzed lignin obtained.

14 . A method according to claim 9 preceded by the following steps:
A3) providing a lignin or a modified lignin,
B3) adding phenol and concentrated sulphuric acid
C3) heating the mixture
D3) adjusting the pH and optionally
E3) filtering, washing and freeze-drying the phenolated lignin obtained.

15 . A method for manufacturing a composition for coating, according to claim 1 , comprising the following steps:
x) providing a lignin or a modified lignin, y) adding a solvent, z) adding an epoxy-group containing compound and mixing said components, thus providing a composition.

16 . A composition obtainable by the method according to claim 9 .

17 . (canceled)

18 . (canceled)

19 . A composition according to claim 4 , wherein the solvent is selected from the group consisting DMSO, NaOH, MeOH, DMF, water and combinations thereof.

20 . A composition according to claim 5 , wherein the catalyst is selected from group consisting of Triethylenetriamine (TETA), Tetramethylammonium hydroxide (TMAH), triethylamine (TEA) and combinations thereof.

Assignees

• Stora Enso Oyj

Inventors

• Zafar Ashar
• Areskogh Dimitri

Classifications

• C09D171/03

  Polyepihalohydrins · CPC title

• C09J197/005

  Lignin · CPC title

• C09D163/00 Primary

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C08G59/22

  Di-epoxy compounds · CPC title

• C08H6/00

  Macromolecular compounds derived from lignin, e.g. tannins, humic acids · CPC title