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US 10,781,281 B2Granted
Resin for ink and ink
AssigneeHarima Chemicals, Inc.
InventorsYasunori Ohashi, Hiroyuki Hisada, Lin Zhou, Maiko Yamamoto
Life of this patent
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Abstract
A method for producing a resin for ink which includes reacting a lignin, a phenol, and an aldehyde so as to obtain a lignin-containing resol phenolic resin; and reacting the obtained lignin-containing resol phenolic resin with a rosin-based resin, and polyhydric alcohol.
Claims2
A method for producing a resin for ink, the method comprising:
- reacting a lignin, a phenol, and an aldehyde so as to obtain a lignin-containing resol phenolic resin,
- reacting the obtained lignin-containing resol phenolic resin with a rosin-based resin, and a polyhydric alcohol, and
- producing the lignin-containing resol phenolic resin by allowing a phenol-modified lignin obtained after allowing the lignin to react with the phenol under the presence of an acid catalyst to react with the aldehyde under the presence of an alkali catalyst.
Dependencies are inferred from the claim text.