Submicron lignin dispersions

Details Submicron lignin dispersions Submicron lignin dispersions

1988-10-11

1990-09-18

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Cellulose liberation waste liquor, solid, or reaction...

C08L 9702

Patent

active

049575570

ABSTRACT:
A lignin dispersion of submicron particles with film forming, binding, and adhesive properties in which the median particle diameter of the lignin in dispersion preferably is less than about 300 angstroms. The aqueous dispersion is formed by reacting about 12 to 18% lignin by weight in aqueous solution with from about 2 to 15 moles ammonia, 4 to 12 moles formaldehyde, and 0.25 to 1.25 moles sodium hydroxide or potassium hydroxide at a temperature of at least about 150.degree. F. for a period of time to produce a colloidal dispersion of lignin particles.

REFERENCES:
patent: 3216839 (1965-11-01), Webster
patent: 4097377 (1978-01-01), Ayukawa
patent: 4891070 (1990-01-01), Dilling et al.
patent: 4892587 (1990-01-01), Dilling et al.
patent: 4892588 (1990-01-01), Dilling et al.
Hackh's Chemical Dict., pp. 214 & 213, 1944.

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