Method of making a binder composition, and binder composition
AssigneeUpm-Kymmene Corporation
InventorsSuvi Pietarinen, Sanna Valkonen, Okko Ringena
Life of this patent
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Abstract
The invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols, while keeping the temperature of the composition at 0-60° C.; and b) allowing the composition to react while keeping the temperature of the composition at 60-100° C. and the pH of the composition at a pH value of 6-14. The invention relates further to a method for producing a binder composition and to different applications thereof.
Claims31
A method for producing a binder composition, the method comprising:
- mixing lignin with water, an alkali, and a compound selected from a class of phenols to form a first composition such that the lignin in the first composition is substantially dissolved;
- allowing the dissolved lignin in the first composition to react at a temperature of 60-100° C. with the compound selected from the class of phenols and the alkali in the first composition;
- and
- adding a crosslinking agent to the first composition to form a second composition, the crosslinking agent substantially reacting with both the compound selected from the class of phenols and the lignin,
- wherein a concentration of the lignin in the first composition is 10-40 weight-% based on a total weight of the first composition, and
- wherein a concentration of the alkali in the first composition is 0.1-15 weight-% based on the total weight of the first composition.
A binder composition comprising:
- a first part including dissolved lignin, water, an alkali, and a compound selected from a class of phenols, wherein the dissolved lignin in the first part is reacted at a temperature of 60-100° C. with the compound selected from the class of phenols and the alkali;
- and
- a second part reacted with the first part, the second part including a crosslinking agent, wherein the cross-linking agent is reacted with both the compound selected from the class of phenols and the alkali,
- wherein a concentration of the lignin in the first part is 10-40 weight-% based on a total weight of the first part, and
- wherein a concentration of the alkali in the first part is 0.1-15 weight-% based on the total weight of the first part.
A method for producing a binder composition, the method comprising:
- mixing lignin with water, an alkali, and a compound selected from a class of phenols to form a first composition such that the lignin in the first composition is substantially dissolved;
- allowing the dissolved lignin to react at a temperature of 60-100° C. with the alkali and the compound selected from the class of phenols in the first composition;
- and
- adding a crosslinking agent to the first composition to form a second composition, the crosslinking agent being reacted with both the phenol and the lignin,
- wherein a weight ratio of the lignin to the alkali in the first composition is from 40:60 to 99.8:0.2.
A binder composition formed from an aqueous composition, the aqueous composition comprising:
- lignin;
- an alkali;
- a crosslinking agent;
- a compound selected from a class of phenols;
- and
- water,
- wherein a weight ratio of the lignin to the alkali in the aqueous composition is from 40:60 to 99.8:0.2.
Dependencies are inferred from the claim text.