Lignin derivative polymers

Details Lignin derivative polymers Lignin derivative polymers

1986-06-17

1988-09-06

Nielsen, Earl

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

Synthetic resins

From lignin, tannin, or derivative reactant

527400, 527401, 530500, 530501, 530502, 530505, C08H 502

Patent

active

047694343

ABSTRACT:
A polymer material of the product of reaction of a grass plant lignin derivative comprising lignin polymer fragments recovered from black liquor obtained in the pulping of grass plant material and containing an average of more than 0.4 sites per phenyl propane unit of the polymer fragments reactive to base catalyzed substitution and condensation reactions, with an electrophilic compound which is capable of reacting twice at one side or at least once at each of two different sites.

REFERENCES:
patent: 2168160 (1939-08-01), Hochwalt et al.
patent: 2201797 (1940-05-01), Scott
patent: 2209289 (1940-07-01), Wallace
patent: 2221282 (1940-11-01), Champer et al.
patent: 2404840 (1946-07-01), Harvey
patent: 3886101 (1975-05-01), Felicetta et al.

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