Polyurethane system, polyurethane polymer and adhesive thereof
OwnerAleksandra Alicja Wroblewska, Panagiotis FALIREAS +2inventors
InventorsAleksandra Alicja Wroblewska, Panagiotis FALIREAS, Karolien VANBROEKHOVEN, Richard VENDAMME
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Abstract
The present invention relates to the field of polyurethanes, in particular, to a multicomponent polyurethane system comprising lignin, a polyurethane polymer and an adhesive thereof.
Claims14
A multicomponent reactive polyurethane system comprising:
- a isocyanate having two or more isocyanate groups;
- a polyol, preferably a diol;
- lignin;
- and
- one or more sugars;
- wherein the one or more sugars comprise at least one methoxy group and at least one hydroxy group;
- wherein the one or more sugars are present in the system at a concentration Csugar from 1.0% w/w to 10.0% w/w, defined according to eq. 1
- C
- s
-
- u
-
- g
-
- a
-
- r
- (
- %
- ,
- w
- /
- w
- )
- =
- w
- s
-
- u
-
- g
-
- a
-
- r
- w
- s
-
- u
-
- g
-
- a
-
- r
- +
- w
- l
-
- i
-
- g
-
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-
- i
-
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- +
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-
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-
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- ×
- 1
-
- 0
-
- 0
- (
- eq
- .
- 1
- )
- wherein wsugar corresponds to the sum of the weights the one or more sugars, wlignin corresponds to the weight of the lignin, wisocyanate corresponds to the sum of the weights the one or more isocyanates and wpolyol corresponds to the sum of the weights the one or more polyols;
- and wherein the lignin is present in the system at a concentration Clignin from 1.0% w/w to 30.0% w/w, defined according to eq. 2
- C
- l
-
- i
-
- g
-
- n
-
- i
-
- n
- (
- %
- ,
- w
- /
- w
- )
- =
- w
- l
-
- i
-
- g
-
- n
-
- i
-
- n
- w
- s
-
- u
-
- g
-
- a
-
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- +
- w
- l
-
- i
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-
- i
-
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- w
- p
-
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-
- l
-
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- ×
- 100.
- (
- eq
- .
- 2
- )
The system according to any one of the previous claims, wherein the lignin and the one or more sugars are provided as a methanolysis product of a lignocellulosic biomass.
The system according to any one of the previous claims, wherein the one or more sugars are selected from the list:
- methyl-pentopyranoside, methyl-D-gluconpyranoside, methyl-D-xylopyranoside, methyl 3-O-acetylpentopyranoside, dimethyl-4-O-methyl-hexanopyroside.
The system according to any one of the previous claims, further comprising a solvent, wherein the solvent preferably comprises an ether, preferably a cyclic ether, preferably tetrahydrofuran.
The system according to the previous claim, wherein the one or more sugars, the one or more isocyanates, the lignin and the one or more polyols are present in the system at a concentration in volume respect to the solvent Csol defined according to eq. 6
- C
- s
-
- o
-
- l
- (
- %
- ,
- w
- /
- v
- )
- =
- w
- s
-
- u
-
- g
-
- a
-
- r
-
- s
- +
- w
- l
-
- i
-
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-
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-
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-
- n
- +
- w
- p
-
- o
-
- l
-
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-
- l
- +
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- i
-
- s
-
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-
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-
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-
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-
- n
-
- a
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- t
-
- e
- V
- s
-
- o
-
- l
-
- v
-
- e
-
- n
-
- t
- ×
- 100
- (
- eq
- .
- 6
- )
- wherein wsugar corresponds to the sum of the weights the one or more sugars, wlignin corresponds to the weight of the lignin, wisocyanate corresponds to the sum of the weights the one or more isocyanates, wpolyol corresponds to the sum of the weights the one or more polyols and Vsolvent corresponds to the volume of the solvent, wherein Csol is from 150 w/v % to 250 w/v %, preferably from 175 w/v % to 225 w/v %.
Dependencies are inferred from the claim text.