×

Lignin resins and process of making same

  • US 2,494,545 A
  • Filed: 04/20/1946
  • Issued: 01/17/1950
  • Est. Priority Date: 04/20/1946
  • Status: Expired due to Term
0
Associated Cases
0
Associated Defendants
0
Product Citations
0
Petitions
2
Forward Citations
0
Assignments
First Claim
Patent Images

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.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×