Soluble, solid or crosslinked graft copolymers of lignin (2-prop

Details Soluble, solid or crosslinked graft copolymers of lignin (2-prop Soluble, solid or crosslinked graft copolymers of lignin (2-prop

1992-03-27

1993-03-16

Schofer, Joseph L.

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

Synthetic resins

From lignin, tannin, or derivative reactant

525 8, C08H 502, C08G 6391

Patent

active

051945525

ABSTRACT:
A soluble, solid, or crosslinked graft copolymer of lignin-(2-propenamide)-(2-methyl-3-oxo-4-oxybut-1-ene-(p-ethoxy-(3*p+3)-ol ) 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; the number of ethoxyl repeat units, p, in the polyol repeat unit is between 1 and 300,000; and the total number of random units in the grafted side chain, n+m, or chains, x*(n+m), is in the range of 1 to 300,000 units, such that the total copolymer molecular weight is in the range of 1,000 to 300,000,000.
The copolymers of the present invention are useful as 1) thickeners for water and aqueous solutions or 2) plastics and elastomers.

REFERENCES:
patent: 4889902 (1989-12-01), Meister

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