CN1087758C - Cavitation erosion preventing paint - Google Patents
Cavitation erosion preventing paint Download PDFInfo
- Publication number
- CN1087758C CN1087758C CN97105861A CN97105861A CN1087758C CN 1087758 C CN1087758 C CN 1087758C CN 97105861 A CN97105861 A CN 97105861A CN 97105861 A CN97105861 A CN 97105861A CN 1087758 C CN1087758 C CN 1087758C
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- China
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- paint
- cavitation erosion
- epoxy
- surface layer
- primer
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- Paints Or Removers (AREA)
Abstract
The present invention relates to a cavitation erosion preventing paint which comprises base rubber and a surface layer combination. The paint is characterized in that the base rubber comprises epoxy resin of which the epoxy equivalent is 180 to 240, epoxy-terminated polyurethane, filling materials, an addition agent and a solidifying agent, in the weight percentage of 45 to 55, 7.5 to 20, 6.5 to 26, 0.5 to 2.5 and 15 to 22.5, and the solidifying agent is mixed with catalyst occupying 2 to 10% of the total weight in advance. The base rubber of the paint has favorable adhesion force to base materials, the surface layer of the paint has favorable cavitation erosion, corrosion and hydrolysis preventing capability, and the paint has the advantages of low cost and simple construction technology.
Description
The present invention relates to a kind of coating, more specifically to a kind of anti-corrosive paints.
Water turbine working wheel, water screw etc. are subjected to washing away of current for a long time; its surface has formed the intensive cavitation corrosion; it is badly damaged that turbine blade is subjected to, and the power station needs often shutdown maintenance, changes the blade that damages, and causes direct greatly and indirect economic loss.Disclose a kind of cavitation erosion preventing paint in the EP294013 patent, it is mainly by bisphenol A epoxide resin, dibutyl phthalate, glycol ether two (3-aminopropyl) ether, γ-amine propyl-triethoxysilicane, Magnesium Silicate q-agent and colloid SiO
2Deng form.This coating composition complexity, the cost height, and its cavitation erosion preventing performance is not good, only is 5 times of carbon steel.Present China power station anti-corrosion polyurethane coatings that adopt by U.S.'s import more, this execution of coating complex process, need be under 130～150 ℃ of temperature baking-curing, cost an arm and a leg, performance is also stable inadequately, result of use is also not really desirable.China also develops a kind of epoxy powder emery type water turbine protective system, and the wear resistance of this coating is good, but the cavitation erosion preventing performance is also relatively poor.
The object of the present invention is to provide the cavitation erosion preventing paint that reaches strong adhesion between coating and the base material between a kind of coating, it can remedy the above-mentioned deficiency of existing similar coating.
A kind of cavitation erosion preventing paint, comprise primer and surface layer composition two portions, it is characterized in that primer is the Resins, epoxy of 180-240 by epoxy equivalent (weight), epoxy-terminated polyurethane, stopping composition, auxiliary agent and polymeric amide are formed, their weight percentage is respectively 45-55,7.5-20,6.5-26,0.5-2.5 and 15-22.5, sneaked into the catalyzer that accounts for gross weight 2-10% in the polymeric amide in advance, described surface layer composition is by end-NCO base polyether prepolymer, solvent and 3,3 '-two chloro-4,4 '-the ditan diamines forms, and their weight percentage are respectively 55-74,20-36 and 5-10.
Its primer of coating of the present invention has good sticking power to base material, and its surface layer has good cavitation erosion resistant and corrosion-resistant and anti-hydrolysis ability, and cost is low, and construction technology is simple.
Below by embodiment the present invention is described.
Coating of the present invention comprises primer and surface layer composition two portions, the KH-550 auxiliary agent of 50 kilograms of E-44 Resins, epoxy, 15 kilograms of epoxy-terminated polyurethanes, 16.5 kilogram of 200 purpose lapis amiridis stopping composition and 1.5 kilograms is mixed, sneak into 17 kilograms 600# polyamide curing agent again, mix and promptly get thickness primer of the present invention.Sneaked into 0.5 kilogram DMP-30 catalyzer in this polymeric amide in advance.Elastomer surface layer composition of the present invention is made up of end-NCO base polyether prepolymer, solvent and linking agent, and their weight percentage is respectively 55～74,20～36 and 5～10.In the present embodiment earlier together with end-NCO polyether prepolymer of 61 kilograms, 21 kilograms of solvent, stir evenly, again with 9 kilograms of cyclohexanone solvents and 9 kilograms of MOCA (3,3 '-two chloro-4,4 '-the ditan diamines) the linking agent mixing, at last two mixtures are mixed, be surface layer composition of the present invention.
Above-mentioned end-NCO base polyether prepolymer is made through addition reaction by tetrahydrofuran (THF) polyether glycol, propylene oxide polyether triol and excessive tolylene diisocyanate.Above-mentioned epoxy-terminated polyurethane is by poly-oxyethylene glycol or poly-propylene oxide triol and excessive toluene two different hydrogen acid ether reactions, allows products therefrom make with alcohol (for example Racemic glycidol) reaction of being with epoxy group(ing) again.
When using coating of the present invention, earlier to the parts of construction for example turbine blade carry out derusting by sandblast.Metallic surface after the rust cleaning should be used 2% ethanol solution wipe surfaces of coupling agent earlier in 2 hours.After half an hour, brush the first road primer with the coupling agent treatment base material.Primer brushing road number is no less than two roads.Can brush down primer behind the surface drying one, the construction of twice primer is at interval no longer than 48 hours.Primer has been constructed in the back 24～48 hours earlier with 120 orders～200 purpose emery cloths polishing primer surface till beat time.The brushing first road surface of elastomer layer within 8 hours after the primer surface treatment.Usefulness acetone wiping half an hour primer surface before the surface construction prerequisite.Can brush the second road surface layer behind the surface drying.The twice construction at interval must not be above 10 hours.Elastomerics surface layer suggestion brushing 10 roads.Reaching 1.8mm～2.5mm with the build of elastomerics surface layer is as the criterion.The parts that construction is good were placed 3 days under the exsiccant room temperature condition.Then envrionment temperature is increased to 65～70 ℃, construction afterwards finishes to be incubated 48 hours.Parts can be installed and used.
Coating of the present invention also is called the PC-136 cavitation erosion preventing paint.
Claims (1)
1, a kind of cavitation erosion preventing paint, comprise primer and surface layer composition two portions, it is characterized in that primer is the Resins, epoxy of 180-240 by epoxy equivalent (weight), epoxy-terminated polyurethane, stopping composition, auxiliary agent and polymeric amide are formed, their weight percentage is respectively 45-55,7.5-20,6.5-26,0.5-2.5 and 15-22.5, sneaked into the catalyzer that accounts for gross weight 2-10% in the polymeric amide in advance, described surface layer composition is by end one NCO base polyether prepolymer, solvent and 3,3 '-two chloro-4,4 '-the ditan diamines forms, and their weight percentage are respectively 55-74,20-36 and 5-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105861A CN1087758C (en) | 1997-05-11 | 1997-05-11 | Cavitation erosion preventing paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105861A CN1087758C (en) | 1997-05-11 | 1997-05-11 | Cavitation erosion preventing paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199073A CN1199073A (en) | 1998-11-18 |
| CN1087758C true CN1087758C (en) | 2002-07-17 |
Family
ID=5168155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97105861A Expired - Fee Related CN1087758C (en) | 1997-05-11 | 1997-05-11 | Cavitation erosion preventing paint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1087758C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443716C (en) * | 2003-07-28 | 2008-12-17 | 上海康达化工有限公司 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
| TWI453253B (en) * | 2007-10-18 | 2014-09-21 | Ajinomoto Kk | Resin composition |
| CN104559728A (en) * | 2014-12-12 | 2015-04-29 | 中国航空工业集团公司北京航空材料研究院 | Corrosion-resistant anti-cavitation coating and preparation method thereof |
| CN107142002B (en) * | 2017-06-09 | 2019-06-14 | 硕投（武汉）高分子技术有限公司 | A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and preparation method thereof |
| CN108841295A (en) * | 2018-07-13 | 2018-11-20 | 安徽康瑞高科新材料技术工程有限公司 | A kind of cavitation erosion preventing paint and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0294013A2 (en) * | 1987-05-27 | 1988-12-07 | Palmer International Inc | Cavitation-resistant polymer and coating |
| CN1076712A (en) * | 1993-03-14 | 1993-09-29 | 肖扬华 | Single component (resisting) wet solidification polyurethane waterproof coating resin and preparation method thereof |
| CN1089965A (en) * | 1992-12-17 | 1994-07-27 | 格雷斯公司 | Novel polyurethane compositions with enhanced antiseptic property |
-
1997
- 1997-05-11 CN CN97105861A patent/CN1087758C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0294013A2 (en) * | 1987-05-27 | 1988-12-07 | Palmer International Inc | Cavitation-resistant polymer and coating |
| CN1089965A (en) * | 1992-12-17 | 1994-07-27 | 格雷斯公司 | Novel polyurethane compositions with enhanced antiseptic property |
| CN1076712A (en) * | 1993-03-14 | 1993-09-29 | 肖扬华 | Single component (resisting) wet solidification polyurethane waterproof coating resin and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1199073A (en) | 1998-11-18 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |