RU2222562C1 - Composition for formation of hydrophobic coatings by cathode electrodeposition technique - Google Patents
Composition for formation of hydrophobic coatings by cathode electrodeposition technique Download PDFInfo
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- RU2222562C1 RU2222562C1 RU2002117014/04A RU2002117014A RU2222562C1 RU 2222562 C1 RU2222562 C1 RU 2222562C1 RU 2002117014/04 A RU2002117014/04 A RU 2002117014/04A RU 2002117014 A RU2002117014 A RU 2002117014A RU 2222562 C1 RU2222562 C1 RU 2222562C1
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Изобретение относится к композициям для получения гидрофобных покрытий методом катодного электроосаждения и может быть использовано, когда требуются покрытия минимальной толщины (не выше 10 мкм), например, при защите труб конденсаторов теплообменных аппаратов из медных сплавов, где необходима капельная конденсация пара. The invention relates to compositions for producing hydrophobic coatings by the method of cathodic electrodeposition and can be used when coatings of minimum thickness (not higher than 10 μm) are required, for example, when protecting condenser tubes of heat exchangers made of copper alloys, where drop condensation of steam is required.
Известны композиции для получения гидрофобных покрытий на основе карбоксилсодержащих смол для анодного электроосаждения и дисперсии фторопласта (Авт.свид. SU 90780). Они не могут наноситься на поверхности из медных сплавов из-за недостаточной адгезии (И.А.Крылова, Н.Д.Коган, В.Н.Ратников. Окраска электроосаждением. - М.: Химия, 1982). Known compositions for producing hydrophobic coatings based on carboxyl-containing resins for anode electrodeposition and fluoroplastic dispersion (Autosvid. SU 90780). They cannot be applied to surfaces made of copper alloys due to insufficient adhesion (I.A. Krylova, ND Kogan, VN Ratnikov. Electrodeposition painting. - M .: Chemistry, 1982).
Известна композиция для получения тонких фторопластовых покрытий на катоде (Авт.свид. SU 436757), но она обладает пониженной устойчивостью в процессе эксплуатации. A known composition for producing thin fluoroplastic coatings at the cathode (Autosvid. SU 436757), but it has reduced stability during operation.
Предлагаемая композиция лишена этих недостатков. Она основана на использовании раствора в этилцеллозольве эпоксиаминного аддукта диэтиламинопропиламина с эпоксидной смолы с молекулярной массой 900-1100 (смола В-ЭП-041, СТП 6-21-00204151), модифицированного низкомолекулярным ненасыщенным полиэфиром на основе диэтилмалоната (смола ДЭМ, СТП 62-21-00204-127-96), нейтрализованного муравьиной кислотой, и водной дисперсии фторопласта (Ф-4 или Ф-40). The proposed composition is devoid of these disadvantages. It is based on the use of a solution in ethyl cellosolve of the epoxyamine adduct of diethylaminopropylamine with an epoxy resin with a molecular weight of 900-1100 (resin V-EP-041, STP 6-21-00204151), modified with a low molecular weight unsaturated polyester based on diethyl malonate (resin DEM, STP 62-21 -00204-127-96), neutralized with formic acid, and an aqueous dispersion of fluoroplastic (F-4 or F-40).
Композицию готовят следующим образом: смешивают смолу ВЭП-041 со смолой ДЭМ в соотношении 9:1 (вес.ч). Нейтрализуют муравьиной кислотой и перемешивают в течение 2-х часов, разбавляют водой до с.о.10% (100 г/л). The composition is prepared as follows: mix VEP-041 resin with DEM resin in a ratio of 9: 1 (weight.h). Neutralized with formic acid and stirred for 2 hours, diluted with water to s.o. 10% (100 g / l).
К полученному раствору при перемешивании добавляют 50-65%-ную водную дисперсию фторпласта Ф-4 (политетрафторэтилен) или Ф-4Д (сополимер политетрафторэтилена с гексафторпропиленом), стабилизированную оксиэтилированным нонилфенолом (ОП-7). Перемешивание продолжают не менее 2-х часов. Полученная композиция агрегативно и кинетически устойчива в течение не менее месяца. To the resulting solution, a 50-65% aqueous dispersion of F-4 fluoroplast (polytetrafluoroethylene) or F-4D (polytetrafluoroethylene-hexafluoropropylene copolymer) stabilized with hydroxyethylated nonylphenol (OP-7) is added with stirring. Stirring is continued for at least 2 hours. The resulting composition is aggregatively and kinetically stable for at least a month.
Подлежащие окраске образцы из сплавов меди и стали 08КП размером 75х75х1 мм обезжиривают уайт-спиритом и ацетоном. Электроосаждение проводят в ванне объемом 3 л при рН 6,3±0,2, напряжении 120 В в течение 120 секунд при Т= 27±2oС. Покрытия промывают обессоленной водой и термоотверждают при 180oС в течение 30 минут. Толщина покрытий составляет 8-10 мкм. В таблице 1 приведены примеры состава композиции, в таблице 2 - свойства композиций.The samples to be painted from alloys of copper and steel 08KP 75x75x1 mm in size are degreased with white spirit and acetone. Electrodeposition is carried out in a 3-liter bath at a pH of 6.3 ± 0.2, voltage of 120 V for 120 seconds at T = 27 ± 2 ° C. The coatings are washed with demineralized water and thermoset at 180 ° C. for 30 minutes. The coating thickness is 8-10 microns. Table 1 shows examples of the composition, in table 2 - the properties of the compositions.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005008927A1 (en) * | 2005-02-24 | 2006-08-31 | Philipps-Universität Marburg | Hydrophobic polymer surface, useful as water-repellant coating in e.g. carpets and yarn, comprises a homo or a copolymer containing a side chain exhibiting fluoro-substituted aryl group |
RU2486220C2 (en) * | 2011-09-07 | 2013-06-27 | Закрытое акционерное общество "ОНТК-94" | High diffusion power cathodic electrodeposition composition for obtaining high hardness and wear resistant coatings |
RU2495070C1 (en) * | 2012-09-05 | 2013-10-10 | Закрытое акционерное общество "ОНТК-94" | High diffusing power paint composition for cathode electrodeposition of chemical- and wear-resistant coatings with high hardness and anticorrosion protection |
RU2600638C2 (en) * | 2014-05-20 | 2016-10-27 | Открытое акционерное общество "АВТОВАЗ" | Method of producing paint coat by anodic electrodeposition |
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2002
- 2002-06-27 RU RU2002117014/04A patent/RU2222562C1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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КРЫЛОВА И.А. и др. Электроосаждение, ком. метод получения лакокрасочных покрытий. - М.: Химия, 1974, с.40-44. * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005008927A1 (en) * | 2005-02-24 | 2006-08-31 | Philipps-Universität Marburg | Hydrophobic polymer surface, useful as water-repellant coating in e.g. carpets and yarn, comprises a homo or a copolymer containing a side chain exhibiting fluoro-substituted aryl group |
RU2486220C2 (en) * | 2011-09-07 | 2013-06-27 | Закрытое акционерное общество "ОНТК-94" | High diffusion power cathodic electrodeposition composition for obtaining high hardness and wear resistant coatings |
RU2495070C1 (en) * | 2012-09-05 | 2013-10-10 | Закрытое акционерное общество "ОНТК-94" | High diffusing power paint composition for cathode electrodeposition of chemical- and wear-resistant coatings with high hardness and anticorrosion protection |
RU2600638C2 (en) * | 2014-05-20 | 2016-10-27 | Открытое акционерное общество "АВТОВАЗ" | Method of producing paint coat by anodic electrodeposition |
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