Reinforcing polymers with laundered amorphous lignin

Details Reinforcing polymers with laundered amorphous lignin Reinforcing polymers with laundered amorphous lignin

1974-06-05

1976-10-05

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260762, C08H 502, C08L 700, C08L 900, C08L 9700

Patent

active

039843629

ABSTRACT:
Lignin of improved reinforcing properties in polymers, is prepared by steps comprising:
A. laundering crude lignin in an aqueous medium,
B. reforming the lignin at a pH of about 2 to about 3 at a temperature of about 88.degree. to 95.degree.C, and
C. washing the reformed precipitate to remove soluble material and drying the resulting solids.
Polymer latices can be added before final pecipitation and the lignin-latex coprecipitated. The lignin can be milled directly into rubber to give good ultimate tensile strengths. This lignin can also be used as a reactive reinforcing filler in plastics.

REFERENCES:
patent: 3163614 (1964-12-01), Dimitri
patent: 3223697 (1965-12-01), Ball et al.
patent: 3247135 (1966-04-01), Doughty
patent: 3808192 (1974-04-01), Dimitri

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