Process for grafting lignin with vinylic monomers using separate

Details Process for grafting lignin with vinylic monomers using separate Process for grafting lignin with vinylic monomers using separate

1989-01-23

1990-01-02

Kight, John

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

Synthetic resins

From lignin, tannin, or derivative reactant

C05G 304, C05G 302

Patent

active

048914150

ABSTRACT:
A graft copolymer of lignin and vinylic monomer is produced by a continuous process wherein the vinylic monomer and a suitable initiator compound are continuously, but separately, fed to a solution of the lignin. The monomer is selected from a group consisting of the general formula RCH.dbd.CHR'R" where R and R' are H, or alkyl group, and R" is --COOH, --CN or --CONH.sub.2 and the initiator is hydrogen peroxide, organic peroxides or persulfates.

REFERENCES:
patent: 4276077 (1981-06-01), Zaslavsky et al.
patent: 4374738 (1983-02-01), Kelley
"Study of the Graft Copolymerization of Lignosulfonate and Acrylic Monomers", Chen et al., 1980, pp. 2211-2220.

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