DEINKING AGENT FOR RECYCLING WASTE PAPER

摘要

PURPOSE:To obtain a deinking agent capable of providing recycled pulp with a high whiteness and a low content of residual ink by mixing a specific compound with a reaction product prepared by subjecting a mixture of natural fats and oils with an active-hydrogen-containing amine compound to addition reaction with an alkylene oxide at a specified ratio. CONSTITUTION:The objective deinking agent is obtained by mixing (A) a compound expressed by the formula (R is 12-22C alkyl or alkenyl; AO is alkylene oxide consisting essentially of ethylene oxide and an 8-30C long-chain alkylene oxide; n is 1-20; M is H, alkali metal or ammonium) with (B) a reaction product prepared by subjecting a mixture of natural fats and oils (e.g. coconut oil) with an amine compound (e.g. ammonia) having >=2 active hydrogens at preferably (1:0.1)-(1:3) molar ratio to addition reaction with an alkylene oxide (e.g. ethylene oxide) in an amount of preferably 5-200mol based on 1mol mixture at (5/95)-(40/60) weight ratio of the components [(A)/(B)].