C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
260/133, 6/47
C08G 75/02 (2006.01) C08G 75/18 (2006.01) C08G 75/20 (2006.01) C08L 97/00 (2006.01) C07G 1/00 (2006.01) C08H 6/00 (2010.01)
Patent
CA 1050013
ABSTRACT OF THE DISCLOSURE The invention relates to a three-dimensional, aromatic, sulfur-containing polymer of great molecular size and based on lignin, and to a method for manufacturing this polymer. The polymer is characterized in that it is amorphous, practic- ally insoluble in water and conventional organic solvents; it contains thioether bonds and possibly sulfoxide and/or sulfone groups formed by oxidizing of thioether bonds, and possibly carbon-carbon bonds between aromatic rings and/or side chains and possibly other bonds typical to lignin. Its thermostability is at least 200°C; and it has been obtained from lignin which is dissolved or undissolved, chlorinated or unchlorinated, purified or containing other components of spent pulp liquor, by heating at about 160 - 350°C, preferably in an atmosphere substantially of nitrogen and/or water vapor, for a time sufficient to form the polymer, with sulfur and/or inorganic or organic sulfur compound so that degradation products of lignin, containing aromatic rings, or corresponding aromatic compounds, with an activating substituent, or fillers have possibly been added. The polymers are useful as replacements for poly(phenoline sulfide)polymers and plastics made of synthetic compounds.
220526
Hortling Bo.
Lindberg Jarl J.
Turunen Johannes
Na
Oy Rauma-Repola
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