摘要:
A treatment agent for hydrophilicity preferable for aluminum materials used for heat exchanger parts and air filter parts of air cleaner which can maintain the deodorizing property and hydrohilicity even after a long-time use, and a method of preparing said treatment agent. A treatment agent for hydrophilicity according to this invention comprising silica particulates and polymer of vinyl alcohol series in the weight ratio in the range 30:70∼70:30, amounting to 0.2∼25 weight percent in total of both relative to the entire treatment agent, in which said silica particulates are coated with said polymer of vinyl alcohol series, and dispersed in aqueous medium as coated particles having the average particle diameter 5∼1000 nm.
摘要:
There is disclosed a rust prevention and hydrophilization treatment method for a flux-brazed aluminum-made heat exchanger which comprises subjecting the same to a rust prevention treatment by the use of a zirconium base compound and/or a titanium base compound, and thereafter subjecting the same to a hydrophilization treatment by means of a hydrophilization treatment agent composition containing the under-mentioned components: (1) 40 to 90% by mass of polyvinyl alcohol having a degree of saponification of at least 90% ; (2) 3 to 40% by mass of polyoxyalkylene-modified polyvinyl alcohol in which 0.01 to 20% of pendant groups are polyoxyalkylene ether groups; (3) 1 to 30% by mass of an inorganic cross-linking agent which reacts with hydroxyl groups of the polyvinyl alcohol and modified polyvinyl alcohol; and (4) 1 to 20 % by mass of a guanidine compound and / or a salt thereof. The above simplified method dispenses with a flux removal step without causing wastewater treatment problems, and thus assures favorable rust prevention and deodorization effects.
摘要:
There is disclosed a rust prevention and hydrophilization treatment method for a flux-brazed aluminum-made heat exchanger which comprises subjecting the same to a rust prevention treatment by the use of a zirconium base compound and/or a titanium base compound, and thereafter subjecting the same to a hydrophilization treatment by means of a hydrophilization treatment agent composition containing the under-mentioned components:
(1) 40 to 90% by mass of polyvinyl alcohol having a degree of saponification of at least 90% ; (2) 3 to 40% by mass of polyoxyalkylene-modified polyvinyl alcohol in which 0.01 to 20% of pendant groups are polyoxyalkylene ether groups; (3) 1 to 30% by mass of an inorganic cross-linking agent which reacts with hydroxyl groups of the polyvinyl alcohol and modified polyvinyl alcohol; and (4) 1 to 20 % by mass of a guanidine compound and / or a salt thereof.
The above simplified method dispenses with a flux removal step without causing wastewater treatment problems, and thus assures favorable rust prevention and deodorization effects.
摘要:
A treatment agent for hydrophilicity preferable for aluminum materials used for heat exchanger parts and air filter parts of air cleaner which can maintain the deodorizing property and hydrohilicity even after a long-time use, and a method of preparing said treatment agent. A treatment agent for hydrophilicity according to this invention comprising silica particulates and polymer of vinyl alcohol series in the weight ratio in the range 30:70∼70:30, amounting to 0.2∼25 weight percent in total of both relative to the entire treatment agent, in which said silica particulates are coated with said polymer of vinyl alcohol series, and dispersed in aqueous medium as coated particles having the average particle diameter 5∼1000 nm.
摘要:
A treatment method for hydrophilicity for a heat exchanger which can maintain the deodorizing property and hydrohilicity even after a long-time use, and a heat exchanger thus treated for hydrophilicity by said method are provided. After a previous acidic washing treatment, a heat exchanger is subjected to a chemical transformation treatment to form a chemical conversion coating film using a chromium chromate treatment agent, chromium phosphate treatment agent, or treatment agent of zirconium series, followed by a treatment for hydrophilicity using a treatment agent for hydrophilicity, which contains silica particulates and polymer of vinyl alcohol series in aqueous medium in a weight ratio 30:70∼70:30 and in tot al content of 1∼25 weight percent, and in which said silica particulates are coated with said polymer of vinyl alcohol series, and dispersed as coated particles of the average particle diameter of 5∼1000 nm in aqueous medium, to form the coating film so as to amount to 1∼3 g/m 2 .
摘要翻译:提供了用于亲水性的用于热交换器即使经过长时间使用能够保持除臭性能和hydrohilicity的治疗方法,以及热交换器通过所述方法将如此处理为亲水性。 先前的酸性洗涤处理后,一个热交换器进行化学转化处理以形成化学转化膜,使用铬铬酸盐处理剂,磷酸铬处理剂,或治疗锆系列的试剂,随后通过使用用于亲水性的治疗 一处理剂的亲水性,其中包含以重量比30:70 70:30相似并在1相同25重量%死人含量的二氧化硅微粒和在wässrige介质乙烯醇系聚合物,并且其中所述二氧化硅颗粒是涂覆 与乙烯醇系聚合体说,并且分散在wässrige介质5相似1000纳米的平均粒径的涂覆的颗粒,以形成涂层膜,以便达到1同样为3g / m <2>。