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1. 发明授权

US3959166A Cleaner for automotive engine cooling system 失效
标题翻译：清洁汽车发动机冷却系统
公开(公告)号：US3959166A
公开(公告)日：1976-05-25
申请号：US533355
申请日：1974-12-16
申请人： Alfred W. Oberhofer , James J. Benko , Joseph C. Drozd
发明人： Alfred W. Oberhofer , James J. Benko , Joseph C. Drozd
IPC分类号： C09K5/20 , C11D7/32 , C23G1/04 , F02B77/04 , C09K15/00
CPC分类号： C23G1/04 , C09K5/20 , C11D7/3218 , C11D7/3245 , F02B77/04
摘要： A cleaner to be used preferably in conjunction with conventional glycol-type collants in automotive cooling systems and methods of using same. The present cleaners may be referred to as extended-life cleaners which may be added to the glycol coolant and are co-extensive with the life of said glycol. These cleaners operate to dissolve deposits, minimize corrosion damage, and dissolve organic degradation products, all of which cause heat transfer difficulties. The basic cleaner comprises:A. an aminopolycarboxylic acidB. an .alpha. hydroxy acid such as gluconic, tartaric, or citricC. an azole copper protector such as mercaptobenzothiazole (MBT) and a monoaryl triazole such as benzotriazole or tolyltriazoleWherein the above components are combined in a weight ratio ranging from 3:1:1 to 2:1:1.An aqueous concentrate is preferred and in such a concentrate the amount of Deposit Release Agent varies from about 85-15% with a more preferred range being an aqueous concentrate which contains from 50-15% by weight of the Deposit Release Agent. The balance of such concentrate is, of course, water, preferably soft water. The aqueous concentrates above are adjusted with the water-soluble basic material to give a pH of about 7.5-12.6 with a preferred pH 7.5-10.6.In addition to the Deposit Release Agent noted above, the following components are necessary in some of the cleaner formulations of this invention.1. In order to emulsify in water, an oil-in-water emulsifying agent is utilized, such as Triton CF 10 (Rohm and Haas), an ethoxylated nonylphenol with an average of 9 EtO.2. a reducing agent to reduce iron from Fe.sup.+.sup.+.sup.+ to Fe.sup.+.sup.+ is also present and a preferred reducing agent is thioglycolic acid or one of its soluble alkali metal salts.3. Also present in some of the cleaner compositions is a polymeric dispersant which may be a water-soluble carboxylic acid polymer, a vinyl addition polymer, or carboxymethyl cellulose. A preferred polymer is the copolymer of styrene maleic anhydride and these polymers have a molecular weight of 1,000 to 1,000,000 and preferably 100,000 or less.4. As a brightener or film former for solder an aminoalkanol is utilized preferably diethylaminoethanol.Additionally, a minor quantity of antifoams and dyes may be used in an optional manner as indicated.
摘要翻译：优选与汽车冷却系统中的常规二醇型碰撞物一起使用的清洁剂及其使用方法。本发明的清洁剂可以称为延长寿命的清洁剂，其可以加入到二醇冷却剂中并与所述二醇的使用寿命共同扩大。这些清洁剂用于溶解沉积物，最小化腐蚀损伤，并溶解有机降解产物，所有这些都会导致传热困难。基本清洁剂包括：

2. 发明授权

US3962109A Automotive cleaner plus inhibitor 失效
标题翻译：汽车清洁剂增强剂
公开(公告)号：US3962109A
公开(公告)日：1976-06-08
申请号：US533356
申请日：1974-12-16
申请人： Alfred W. Oberhofer , James J. Benko , Joseph C. Drozd
发明人： Alfred W. Oberhofer , James J. Benko , Joseph C. Drozd
IPC分类号： C23G1/04 , C02B5/00
CPC分类号： C23G1/04
摘要： A cleaner-inhibitor and method of incorporating same into an automotive or diesel coolant system consisting of 2-4 fluid ounces per gallon of a cleaner whose basic components are:A. an aminopolycarboxylic acidB. an .alpha. hydroxy acid such as gluconic, tartaric, or citricC. an azole copper protector such as mercaptobenzothiazole (MBT) and a monoaryl triazole such as benzotriazole or tolyltriazoleWherein the ratio of A:B:C is about 3:1:1 to 2:1:1.A, b, and C above constitute a Deposit Release Agent in the cleaner.The cleaner above is combined with an inhibitor which is a multi-component inhibiting composition of the boron-nitrite type containing an alkali metal silicate and which may include a copper inhibitor and a polymeric dispersant, which is a water-soluble carboxylic acid polymer such as styrene maleic anhydride copolymer, a polyacrylate or methacrylate copolymer or carboxymethyl cellulose.The cleaner-inhibitor is adjusted with caustic to give a pH in the range 7.5-12.6 and preferably 7.5-10.6 either by premix or directly to the coolant system.An aqueous concentrate is preferred for both the cleaner portion and the inhibitor portion. In an aqueous concentrate of the cleaner the amount of Deposit Release Agent varies from about 85-15%, with a more preferred range being an aqueous concentrate which contains from 50-15% by weight of the Deposit Release Agent. In the inhibitor portion the aqueous concentrate contains 75-85% water and the balance active ingredients.The cleaner is used in a dosage of about 4 ounces per gallon of coolant fluid and is combined with about 4 ounces per gallon of the multi-component corrosion inhibitor utilized above. In some instances under favorable conditions, the amount of the cleaner and inhibitor portions of the cleaner-inhibitor composition may each be reduced to 2 ounces per gallon of coolant.

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