Lignin modified binding agents

Details Lignin modified binding agents Lignin modified binding agents

1992-10-26

1993-11-09

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 1, 528149, 528155, 528163, 528218, 528230, 528250, 528254, 528423, 525398, 525405, 525480, 525481, 525491, 525496, 525497, 106 382, 106 386, 106218, 106602, 106603, 524220, 524221, 527403, 188251A, C08G 802

Patent

active

052604055

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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patent: 4239666 (1980-12-01), Jacko et al.
patent: 4320036 (1982-03-01), Gobran et al.
patent: 4469858 (1984-09-01), Chen
patent: 5010156 (1991-04-01), Cook et al.

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