Chemistry: natural resins or derivatives; peptides or proteins; – Lignins or derivatives – Aldehyde – ketone or ozone reacted with a lignin or lignin...
Patent
1989-10-23
1991-04-16
Nielsen, Earl
Chemistry: natural resins or derivatives; peptides or proteins;
Lignins or derivatives
Aldehyde, ketone or ozone reacted with a lignin or lignin...
106238, C08H 502
Patent
active
050083783
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: 3759826 (1973-09-01), Felicetta et al.
patent: 4113675 (1978-12-01), Clarke et al.
patent: 4131573 (1978-12-01), Brown
Krass Frederick
McDaniel Terry B.
Nielsen Earl
Reece IV Daniel B.
Schmalz Richard L.
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