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    • 45. 发明授权
    • Prevention of foam in alkaline cleansing bath by the use of mixed
formals of polyglycol ethers
    • 通过使用聚乙二醇醚的混合形式防止碱性清洁浴中的泡沫
    • US4364777A
    • 1982-12-21
    • US257855
    • 1981-04-27
    • Margarete GrunertKarl SchmidHolger Tesmann
    • Margarete GrunertKarl SchmidHolger Tesmann
    • B01D19/04C11D1/72C11D3/00B08B3/08C11D1/722
    • C11D1/721C11D3/0026
    • An alkaline washing composition comprised of strongly alkaline reacting inorganic salts, optionally wetting agents and a defoaming effective amount of at least one mixed formal of an alkylpolyglycol ether having the formula:R.sub.1 --O--(CH.sub.2 CH.sub.2 O).sub.m --CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n --O--R.sub.2wherein R.sub.1 is a straight or branched chain alkyl or alkenyl with from 8 to 22 carbon atoms, R.sub.2 is a straight or branched chain alkyl with from 1 to 5 carbon atoms, m is a number from 2 to 30 and n is a number from 1 to 3; as well as the improvement in the process of washing rigid solid articles comprising contacting the soiled rigid solid articles with a strongly alkaline washing solution containing a defoaming effective amount of a defoaming agent, rinsing said rigid solid articles and recovering cleaned rigid solid articles, the improvement consisting of using said mixed formal as said defoaming agent.
    • 碱性洗涤组合物由强碱性反应无机盐,任选的润湿剂和消泡有效量的至少一种具有下式的烷基聚乙二醇醚的混合形式组成:具有下式的烷基聚乙二醇醚:R1-O-(CH2CH2O)m-CH2-(OCH2CH2)nO- R2其中R1是具有8-22个碳原子的直链或支链烷基或烯基,R2是具有1至5个碳原子的直链或支链烷基,m是2至30的数,n是从 1〜3; 以及洗涤刚性固体制品的方法的改进,包括使污染的刚性固体制品与含有消泡有效量的消泡剂的强碱性洗涤溶液接触,冲洗所述刚性固体制品并回收清洁的刚性固体制品,改进 包括使用所述混合形式作为所述消泡剂。