Japan's Daiichi Kogyo Seiyaku developed a new deinking agent consisting of I (91 to 99) and II (1 to 9).
In the formula, R1 = C14-20 alkyl, R2 = C22-50 alkyl; l1 and l2 are 3-8; m1 and m2 are 15-25; n1 and n2 are 10-20 and higher fatty acids are composed.
CH3
CH3
CH3
CH3
I: R1-O-(CH2CHO)l1-(CH2CH2O)
M1—(CH2CHO)n1-H
II: R2-O-(CH2CHO)l2-(CH2CH2O)m2-(CH2CHO)n2-H
Examples: Ethylene oxide-methyl ethylene oxide block copolymer stearate 92 parts and ethylene oxide-methyl ethylene oxide block copolymer C40H81 OH ester 8 parts deinking agent, on waste The deinking effect of the pulp is good, and the whiteness of the pulp after deinking is 55.0%.