Lignin modified binding agents

Details Lignin modified binding agents Lignin modified binding agents

1993-08-17

1994-04-05

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528129, 528158, 528162, 528230, 528265, 528266, 525 544, 525 5442, 525398, 525480, 525486, 525495, 525534, C08G 834

Patent

active

053005937

ABSTRACT:
A binding agent for molding compositions and molded bodies produced by reacting a low molecular weight lignin from the Organosolv process with phenol in a weight ratio of 1:20 to 3:1 at 100.degree. to 180.degree. C., adjusting the pH to an acidic value and condensing the mixture with 0.2 to 0.9 moles of formaldehyde per mole of phenol at 60.degree. to 120.degree. C. to form the binding agent useful for producing curable molding compositions, high-temperature molding compositions, refractory products, textile fleeces and friction coatings as well as carbon materials.

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