Lignin resins and process of making same
First Claim
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1. PROCESS OF PREPARING A WATER, ACID, AND ALKALI RESISTANT, HARD RESINOUS MATERIAL WHICH COMPRISES DISSOLVING ALKALI SOLUBLE LIGNIN AND PARTIALLY POLYMERIZED FURFURYL ALCOHOL IN A COMMON SOLVENT CHOSEN FROM THE GROUP CONSISTING OF MONOALKYL ETHERS OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL, ETHERS OF DIETHYLENE GLYCOL AND TETRAHYDROFURFURYL ALCOHOL TO FORM A SOLUTION, SAID COMPONENTS BEING THE ONLY REACTIVE MATERIALS PRESENT, HEATING THE MATERIALS TO REACT THE LIGNIN AND PARTIALLY POLYMERIZED FURFURYL ALCOHOL, AND REMOVING THE SOLVENT WHEREBY A HARD RESINOUS MATERIAL IS FORMED, THE WEIGHT OF SAID LIGNIN BEING BETWEEN 5 AND 60% OF THE TOTAL WEIGHT OF THE LIGNIN AND THE PARTIALLY POLYMERIZED FURFURYL ALCOHOL.
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1 Claim
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1. PROCESS OF PREPARING A WATER, ACID, AND ALKALI RESISTANT, HARD RESINOUS MATERIAL WHICH COMPRISES DISSOLVING ALKALI SOLUBLE LIGNIN AND PARTIALLY POLYMERIZED FURFURYL ALCOHOL IN A COMMON SOLVENT CHOSEN FROM THE GROUP CONSISTING OF MONOALKYL ETHERS OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL, ETHERS OF DIETHYLENE GLYCOL AND TETRAHYDROFURFURYL ALCOHOL TO FORM A SOLUTION, SAID COMPONENTS BEING THE ONLY REACTIVE MATERIALS PRESENT, HEATING THE MATERIALS TO REACT THE LIGNIN AND PARTIALLY POLYMERIZED FURFURYL ALCOHOL, AND REMOVING THE SOLVENT WHEREBY A HARD RESINOUS MATERIAL IS FORMED, THE WEIGHT OF SAID LIGNIN BEING BETWEEN 5 AND 60% OF THE TOTAL WEIGHT OF THE LIGNIN AND THE PARTIALLY POLYMERIZED FURFURYL ALCOHOL.
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