Water soluble graft copolymers of lignin and methods of making t

Details Water soluble graft copolymers of lignin and methods of making t Water soluble graft copolymers of lignin and methods of making t

1988-12-19

1990-07-10

Lovering, Richard D.

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

Synthetic resins

From lignin, tannin, or derivative reactant

C08H 502

Patent

active

049407643

ABSTRACT:
A water-soluble graft copolymer of lignin-(2-propenamide)-(2-methyl-N7,N7-dimethyl-7-ammonium-3-oxo-4-oxyoct- 1-ene chloride or methylsulfate) having a central lignin network and at least one grafted side chain, R, having randomly repeating units of the formula: ##STR1## such that the central lignin network has a molecular weight of about 1,000 to 150,000 and the total number of randomly repeating units in the grafted side chain or chains is in the range of 50 to 300,000 such that the total copolymer molecular weight is in the range of 15,000 to 30,000,000.

REFERENCES:
patent: 3985659 (1976-10-01), Felicetta et al.
patent: 4374738 (1983-02-01), Kelley
patent: 4391719 (1983-07-01), Meister
patent: 4521578 (1985-06-01), Chen et al.
patent: 4676317 (1987-06-01), Fry et al.
patent: 4703801 (1987-11-01), Fry et al.

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