RU2225650C2 - Compound for producing heat-resistant sealed insulating coating on electric steels - Google Patents
Compound for producing heat-resistant sealed insulating coating on electric steels Download PDFInfo
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- RU2225650C2 RU2225650C2 RU2002104650/09A RU2002104650A RU2225650C2 RU 2225650 C2 RU2225650 C2 RU 2225650C2 RU 2002104650/09 A RU2002104650/09 A RU 2002104650/09A RU 2002104650 A RU2002104650 A RU 2002104650A RU 2225650 C2 RU2225650 C2 RU 2225650C2
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- 238000000576 coating method Methods 0.000 title claims abstract description 25
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
- 239000010959 steel Substances 0.000 title claims abstract description 10
- 150000001875 compounds Chemical class 0.000 title abstract 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 239000004202 carbamide Substances 0.000 claims abstract description 7
- 235000019441 ethanol Nutrition 0.000 claims abstract description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000005388 borosilicate glass Substances 0.000 claims abstract description 4
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 7
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims 2
- 239000005368 silicate glass Substances 0.000 claims 1
- 235000011007 phosphoric acid Nutrition 0.000 abstract description 7
- 238000003756 stirring Methods 0.000 abstract description 5
- 235000013877 carbamide Nutrition 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 239000007864 aqueous solution Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004870 electrical engineering Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 8
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 150000002191 fatty alcohols Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012875 nonionic emulsifier Substances 0.000 description 1
- -1 phosphoric acid diesters Chemical class 0.000 description 1
- XUWHAWMETYGRKB-UHFFFAOYSA-N piperidin-2-one Chemical compound O=C1CCCCN1 XUWHAWMETYGRKB-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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Abstract
Description
Изобретение относится к области электротехники, а именно к композициям для изготовления покрытий на электротехнических сталях для магнитопроводов электрических машин и аппаратов. The invention relates to the field of electrical engineering, namely to compositions for the manufacture of coatings on electrical steel for magnetic circuits of electrical machines and apparatuses.
Целью изобретения является создание композиции на основе поливинилового спирта для получения термостойкого покрытия на электротехнической стали, обладающего хорошими электроизоляционными свойствами и позволяющего производить сварку наружных кромок пакетов изолированных стальных пластин с покрытием. The aim of the invention is to create a composition based on polyvinyl alcohol to obtain a heat-resistant coating on electrical steel, which has good electrical insulation properties and allows welding of the outer edges of the packages of insulated coated steel plates.
Известны электроизоляционные композиции для изготовления покрытий на электротехнических сталях на основе ортофосфорной кислоты, бутадиен-стирольного латекса, δ-бутиролактама или - валеролактама, фракции жирных спиртов C7-C12 и воды. При этом качество покрытия обеспечивается введением фракции жирных спиртов (Авт. свид. СССР 1568081). Известна смесь для электроизоляционного покрытия, содержащая латекс этиленпропиленового каучука, целлюлозный эфир, неионногенный эмульгатор, воск и стабилизатор, предохраняющий от старения (Патент ГДР 274512). Недостатком этих композиций является их гетерогенность из-за нерастворимости неорганических компонентов в воде, приводящая к быстрому их расслоению. Следствием этого является неоднородность покрытий по толщине и нетехнологичность процесса нанесения: образование пробок в системах транспортировки композиции даже при небольших нарушениях температурного режима и соотношения компонентов.Known electrical insulation compositions for the manufacture of coatings on electrical steels based on phosphoric acid, styrene-butadiene latex, δ-butyrolactam or valerolactam, the fraction of fatty alcohols C 7 -C 12 and water. Moreover, the quality of the coating is ensured by the introduction of a fraction of fatty alcohols (Auth. Certificate. USSR 1568081). A known mixture for electrical insulation coatings containing latex of ethylene propylene rubber, cellulose ether, nonionic emulsifier, wax and anti-aging stabilizer (Patent GDR 274512). The disadvantage of these compositions is their heterogeneity due to the insolubility of inorganic components in water, leading to their rapid separation. The consequence of this is the heterogeneity of the coatings in thickness and the non-technological application process: the formation of plugs in the composition transportation systems even with small violations of the temperature regime and the ratio of components.
Этих недостатков лишены композиции на основе водорастворимых полимеров, в частности, поливинилового спирта (ПВС). Использование ПВС для получения покрытий позволяет увеличить их диэлектрические свойства и штампуемость. Compositions based on water-soluble polymers, in particular polyvinyl alcohol (PVA), are devoid of these disadvantages. The use of PVA to obtain coatings can increase their dielectric properties and stampability.
Наиболее близким прототипом является композиция для создания термически устойчивого электроизоляционного покрытия на электротехнических сталях на основе поливинилового спирта, ортофосфорной кислоты, мочевины, тиомочевины, борного ангидрида, этилового спирта, глицерина, фталевого ангидрида, ПАВ (поверхностно-активного вещества, представляющего собой смесь моно- и диэфиров фосфорной кислоты с полифторированным спиртом) и воды (Патент РФ 2161341). The closest prototype is a composition for creating a thermally stable electrical insulating coating on electrical steels based on polyvinyl alcohol, phosphoric acid, urea, thiourea, boric anhydride, ethyl alcohol, glycerol, phthalic anhydride, surfactants (a surfactant that is a mixture of mono- and phosphoric acid diesters with polyfluorinated alcohol) and water (RF Patent 2161341).
Недостатком данной композиции является ограниченная термостойкость (только при нагреве в инертной атмосфере), а также невысокий коэффициент электросопротивления изоляции и плохая свариваемость (невозможность реализации сварки пакета стальных пластин с покрытием по боковой поверхности). Все указанные недостатки композиции-прототипа связаны с высокой долей органических компонентов в ее составе. The disadvantage of this composition is the limited heat resistance (only when heated in an inert atmosphere), as well as a low coefficient of electrical resistance of insulation and poor weldability (the inability to weld a package of steel plates coated on the side surface). All these disadvantages of the composition of the prototype are associated with a high proportion of organic components in its composition.
Предлагаемая композиция содержит наряду с ПВС, ортофосфорной кислотой, мочевиной, этиловым спиртом, ПАВ и водой г/л алюмо-боро-силикатное стекло и оксид хрома (III). The proposed composition contains, along with PVA, phosphoric acid, urea, ethanol, surfactants and water g / l aluminum-borosilicate glass and chromium oxide (III).
Композицию готовят путем добавления в водный раствор ПВС при температуре 65-80oС в указанной последовательности ортофосфорной кислоты, мочевины, этилового спирта, ПАВ, длительного перемешивания, охлаждения до комнатной температуры, добавления предварительно приготовленного алюмо-боро-силикатного стекла в виде водной суспензии и оксида хрома (III). Композицию тщательно перемешивают до достижения однородности и наносят на полосу электротехнической стали, удаляя излишки гуммированным роликом. Сушка покрытия производится при температуре 500-600oС в течение 30-60 с.The composition is prepared by adding orthophosphoric acid, urea, ethyl alcohol, surfactant, prolonged stirring, cooling to room temperature, adding pre-prepared alumina-borosilicate glass in the form of an aqueous suspension to the aqueous solution of PVA at a temperature of 65-80 ° C in the indicated sequence chromium oxide (III). The composition is thoroughly mixed until homogeneous and applied to a strip of electrical steel, removing excess gummed roller. The coating is dried at a temperature of 500-600 o C for 30-60 s.
Исследование термостойкости покрытия, измерение коэффициента сопротивления и испытание прочности сцепления покрытия с металлом производят по ГОСТ 21427-83. Толщину покрытий измеряли на приборе Deltascope. Коэффициент сопротивления измеряли на приборе CIS/C-2550 Interlaminar resistivity testоr. Термообработку образцов для испытания термостойкости покрытия производили в атмосфере азот-водород 95:5 и на воздухе. Свойства полученных покрытий сравнивали со свойствами покрытия-прототипа (Патент РФ 2161341). Свариваемость оценивали по возможности получения монолитного (без раковин) сварного шва. The study of the heat resistance of the coating, measuring the coefficient of resistance and testing the adhesion of the coating to the metal is carried out according to GOST 21427-83. Coating thickness was measured on a Deltascope instrument. Resistance coefficient was measured on a CIS / C-2550 Interlaminar resistivity testor. Heat treatment of samples for testing the heat resistance of the coating was carried out in a nitrogen-hydrogen atmosphere of 95: 5 and in air. The properties of the resulting coatings were compared with the properties of the coating prototype (RF Patent 2161341). Weldability was evaluated by the possibility of obtaining a monolithic (without shells) weld.
Составы композиций и свойства полученных электроизоляционных покрытий приведены в таблице. The compositions and properties of the obtained insulating coatings are shown in the table.
Пример: К 800 мл нагретой до 80-85oС деионизированной воды добавляли 50 г ПВС и перемешивали при нагревании до полного растворения. Затем добавляли 5 г ПАВ, 8 г мочевины, охлаждали до 50-60oС и медленно добавляли 15 г ортофосфорной кислоты, 6 г Сr2О3 и 70 г алюмо-боро-силикатного стекла, измельченного и предварительно смешанного с 30 г деионизированной воды. После перемешивания в течение 2 ч к полученному составу добавляли воды до объема 1 л и продолжали перемешивание. Нанесение композиции на стальную полосу производили непосредственно из рабочего бака при непрерывном перемешивании. Сушку покрытия осуществляли при температуре 540-560oС в течение 30-60 с. После сушки замеряли толщину и электросопротивление покрытия, подвергали термической обработке и вновь измеряли электросопротивление, а также исследовали прочность сцепления покрытия с металлом. Производили сварку пакета стальных пластин с покрытием по боковой поверхности методом MIG (полуавтоматическая сварка в среде инертного газа) и исследовали г/л качество получаемого сварного шва.Example: To 800 ml of deionized water heated to 80-85 ° C., 50 g of PVA was added and stirred under heating until completely dissolved. Then 5 g of a surfactant was added, 8 g of urea, cooled to 50-60 ° C. and 15 g of phosphoric acid, 6 g of Cr 2 O 3 and 70 g of boron-aluminosilicate glass, ground and pre-mixed with 30 g of deionized water were slowly added. . After stirring for 2 hours, water was added to the resulting composition to a volume of 1 L and stirring was continued. The composition was applied to the steel strip directly from the working tank with continuous stirring. The coating was dried at a temperature of 540-560 o C for 30-60 s. After drying, the thickness and electrical resistance of the coating were measured, heat treated, and the electrical resistance was again measured, and the adhesion strength of the coating to the metal was examined. A package of steel plates coated on the side surface was welded using the MIG method (semi-automatic welding in an inert gas medium) and the g / l quality of the resulting weld was investigated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2002104650/09A RU2225650C2 (en) | 2002-02-20 | 2002-02-20 | Compound for producing heat-resistant sealed insulating coating on electric steels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2002104650/09A RU2225650C2 (en) | 2002-02-20 | 2002-02-20 | Compound for producing heat-resistant sealed insulating coating on electric steels |
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| Publication Number | Publication Date |
|---|---|
| RU2002104650A RU2002104650A (en) | 2003-08-27 |
| RU2225650C2 true RU2225650C2 (en) | 2004-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299713A (en) * | 1979-07-19 | 1981-11-10 | National Distillers And Chemical Corp. | Electrical tree and water tree resistant polymer compositions |
| RU2117345C1 (en) * | 1996-12-16 | 1998-08-10 | Закрытое акционерное общество "ФК" | Composition for preparing electroinsulating coating |
| RU2127921C1 (en) * | 1997-12-03 | 1999-03-20 | Акционерное общество "ФК" | Compound for producing insulating coating |
| RU2161341C1 (en) * | 1999-06-16 | 2000-12-27 | Айзикович Александр Яковлевич | Compound for producing stable electric insulating coating on electric-steel surfaces |
-
2002
- 2002-02-20 RU RU2002104650/09A patent/RU2225650C2/en active IP Right Revival
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299713A (en) * | 1979-07-19 | 1981-11-10 | National Distillers And Chemical Corp. | Electrical tree and water tree resistant polymer compositions |
| RU2117345C1 (en) * | 1996-12-16 | 1998-08-10 | Закрытое акционерное общество "ФК" | Composition for preparing electroinsulating coating |
| RU2127921C1 (en) * | 1997-12-03 | 1999-03-20 | Акционерное общество "ФК" | Compound for producing insulating coating |
| RU2161341C1 (en) * | 1999-06-16 | 2000-12-27 | Айзикович Александр Яковлевич | Compound for producing stable electric insulating coating on electric-steel surfaces |
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