CN103602220B - A kind of Siloxane hybrid anticorrosive paint - Google Patents
A kind of Siloxane hybrid anticorrosive paint Download PDFInfo
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Abstract
The present invention relates to a kind of Siloxane hybrid anticorrosive paint, in the component A of every 100 mass parts, epoxy resin 20 parts, modified resin 8 ~ 12 parts, pigment and filler 50 ~ 55 parts, auxiliary agent 1 ~ 3 part, surplus are mixed solvent, wherein, epoxy resin be low-molecular-weight bisphenol A-type or bisphenol-f type liquid epoxy one or more; Modified resin is modifying epoxy resin by organosilicon, it with tetraethoxy 42 parts, phenyltrimethoxysila,e 8 parts, gamma-amino propyl trialkoxy silane 4.5 parts, 4 parts, water, hydrochloric acid 1.5 parts, Virahol 25 parts, E-51 epoxy resin 10 parts and 5 parts, acetone for raw material obtain; In the B component of every 100 mass parts, polymeric amide 50 parts, aminosiloxane resin 10 ~ 15 parts, surplus are mixed solvent.A, B component are supporting suitable, and gained coating can by the technical requirements of ISO20340, for oceanographic engineering provides long-effective protection.
Description
Technical field
The present invention relates to a kind of Siloxane hybrid anticorrosive paint.
Background technology
Along with the fast development of national economy, and China is to the Devoting Major Efforts To Developing of oceanic resources, at ocean and periphery thereof, build the positive expanding day of scale of steel construction, the particularly ocean steel construction such as bridge spanning the sea, offshore platform, be subject to the impact of the factors such as high humidity in oceanic climate, high salt fog and intense UV rays, the corrosion speed of its steel construction and degree far away higher than inland atmospheric environment, will formulate oceanographic engineering protection against corrosion standard for this reason.The oceanographic engineering coating standard accepted extensively by industry is at present ISO20340.The organic coating that this standard-required atmospheric marine environment uses, after 4200h circulation weathering test, is that the corrosion of the supporting coating system of priming paint spreads monolateral expansion erosion≤3mm with zinc-rich paint; The corrosion of the supporting coating system being priming paint with non-zinc-rich paint spreads monolateral expansion erosion≤8mm.The high solids epoxy anticorrosive coating the most often used at present, after its film 4200h circulation is aging, its monolateral painting erosion spreads more than 8mm, does not meet this standard-required; The zinc-rich paint of priming paint is widely used as in atmospheric marine environment, wherein the erosion resistance of inorganic zinc coating is better than epoxy zinc-enriched paint, after its film 4200h circulation is aging, monolateral painting erosion spreads≤3mm, meet this standard-required, but its erosion resistance is larger by the impact of lower road coating (such as, the intermediate coat of inorganic zinc silicate primer).
Summary of the invention
The object of the invention is: a kind of Siloxane hybrid anticorrosive paint is provided, steel have excellent sticking power and corrosion resistance nature and for the intermediate coat of inorganic zinc silicate primer, has excellent permeability, erosion resistance.
The technical scheme realizing the object of the invention is: a kind of Siloxane hybrid anticorrosive paint composition, is characterized in that, is made up of component A and B component, and component A is 100:20 with the mass parts ratio of B component;
Component A is by epoxy resin, modified resin, pigment, filler, auxiliary agent and solvent composition, in the component A of every 100 mass parts, epoxy resin 20 parts, modified resin 8 ~ 12 parts, pigment and filler 50 ~ 55 parts, auxiliary agent 1 ~ 3 part, surplus are mixed solvent, wherein, epoxy resin be low-molecular-weight bisphenol A-type or bisphenol-f type liquid epoxy one or more, modified resin is modifying epoxy resin by organosilicon, it is to contain tetraethoxy 42 parts in every 100 mass parts materials, phenyltrimethoxysila,e 8 parts, gamma-amino propyl trialkoxy silane 4.5 parts, 4 parts, water, hydrochloric acid 1.5 parts, Virahol 25 parts, E-51 epoxy resin 10 parts and 5 parts, acetone are raw material, by tetraethoxy, phenyltrimethoxysila,e, Virahol adds in reaction vessel, be warming up to 40 DEG C, start the mixture dripping hydrochloric acid and water, after 1h dropwises, at 60 ~ 70 DEG C of insulation 4h, then gamma-amino propyl trialkoxy silane is added, insulation 1h, formed containing amino silicone resin, add the solution of epoxy resin and acetone again under stirring in batches, continue stirring reaction 4h, normal temperature is cooled to obtain,
B component is made up of polymeric amide, aminosiloxane resin, organic solvent, in the B component of every 100 mass parts, polymeric amide 50 parts, aminosiloxane resin 10 ~ 15 parts, surplus are mixed solvent, and wherein, polymeric amide is the low polymerization degree product of dimeracid and the many ammonia of many ethene; Aminosiloxane resin is DOWCORNING
In above-mentioned Siloxane hybrid anticorrosive paint composition, the epoxy resin in described component A is one or more in E51, E44, F51; Pigment is one or more in titanium dioxide, carbon black, medium chrome yellow medium yellow, phthalocyanine blue; Filler is one or more in talcum powder, calcium carbonate, barium sulfate, silica powder, mica powder, Feldspar Powder, wollastonite powder, molochite; Auxiliary agent is one or more in dispersion agent, defoamer, thixotropic agent, anti-settling agent.
In above-mentioned Siloxane hybrid anticorrosive paint composition, the polymeric amide in described B component is the one in Versmidev-140, BS850A, 350A, and its amine value is at 300 ~ 400mgKOH/g.
In above-mentioned Siloxane hybrid anticorrosive paint composition, the mixed solvent used in component A and B component be dimethylbenzene and butanols mixture, both mass ratioes are 2:1.
Technique effect of the present invention is: the Siloxane hybrid anticorrosive paint of technical solution of the present invention is mainly improved with existing similar coating and is: in component A, 1. have employed the modified resin that special formulation and method are obtained, i.e. modifying epoxy resin by organosilicon.The host component of this modified resin is tetraethoxy, part oxyethyl group in preparation process tetraethoxy and phenyltrimethoxysila,e generation hydrolysis-condensation reaction, use gamma-amino propyl trialkoxy silane end-blocking subsequently, formed containing amino silicone resin, the epoxy group(ing) of the epoxy resin then added is reacted with the amino containing amino silicone resin formed before, obtained modified resin, i.e. modifying epoxy resin by organosilicon, epoxy group(ing) contained by it is after mixing with B component, react with the amino of the aminosiloxane resin forming B component, participate in crosslinking curing, form cross-linked network structure,-O-Si-O-key in modified resin is introduced in network, form hybrid inorganic-organic coating, enhance thermotolerance and the chemical-resistant of coating, add sticking power, improve solidity to corrosion, on the modified resin molecular chain of component A in tetraethoxy unhydrolysed oxyethyl group in the solidification process of film, hydrolysis can be continued, form silicone hydroxyl, chemical bond is formed with the active group on metal substrate, increase the sticking power being coated with interlayer, and then improve the erosion resistance of coating on metal substrate, hybridization coating is made to be tightly adhered on metal substrate by chemical bonding, water molecules or other corrosive mediums are difficult to, at metal interface displacement erosion shield, improve coating and resist the ability of corroding and spreading, simultaneously the adding of modified resin, improve the consistency of aminosiloxane resin in coating system in B component, the two is collaborative uses, and adds the inorganic components of coating, improves the overall performance of coating,
2. the epoxy resin in component A adopt low-molecular-weight bisphenol A-type or bisphenol-f type liquid epoxy one or more, they are diglycidylethers of dihydroxyphenyl propane or Bisphenol F, oxirane value is greater than 0.4, therefore, high crosslink density and shielding properties can be provided, and be in a liquid state under this based epoxy resin normal temperature, the viscosity of resin own is lower, molecular weight, is particularly conducive to the obtained coating with excellent permeability, and the solids content of low viscosity also favourable raising coating;
3. the polymeric amide in B component is the low polymerization degree reactant of dimeracid and divinyl triammonium or triethylene four ammonia, one end of its molecular chain is dimeracid Long carbon chain, there is hydrophobicity, the other end is the hydrophilic-structure of polyamines, there is the effect of similar nonionic emulsifying agent, therefore, have good wetting action to many grounds, flexility is excellent;
It, containing a large amount of-O-Si-O-key, is incorporated in cross-linked network when curing reaction, further increases the chemical resistant properties of coating, thermotolerance and erosion resistance by the aminosiloxane resin 4. in B component itself in the lump.The present invention provides oceanographic engineering long-effective protection by component A and the supporting Siloxane hybrid anticorrosive paint formed of B component, can by the technical requirements of ISO20340.
Embodiment
Below in conjunction with embodiment, the present invention is described further, but is not limited to this.
Embodiment and comparative example raw materials are unless otherwise indicated commercially available industrial goods, buy by commercial channel.
Embodiment 1 prepares modified resin
1. fill a prescription:
In the raw material of 100 mass parts, tetraethoxy 42 parts, phenyltrimethoxysila,e 8 parts, gamma-amino propyl trialkoxy silane 4.5 parts, distilled water 4 parts, hydrochloric acid 1.5 parts, Virahol 25 parts, E-51 epoxy resin 10 parts, 5 parts, acetone, in above-mentioned raw materials, demineralizing acid is that outside analytical pure, all the other are industrial goods.
2. preparation method
Tetraethoxy, phenyltrimethoxysila,e, Virahol are added in reaction vessel, is warming up to 40 DEG C, start the mixture dripping hydrochloric acid and water, after 1h dropwises, at 60 ~ 70 DEG C of insulation 4h, then add gamma-amino propyl trialkoxy silane, insulation 1h, formed containing amino silicone resin, under stirring, add the solution of epoxy resin and acetone more at least at twice, continue stirring reaction 4h, be cooled to normal temperature to obtain modified resin, i.e. modifying epoxy resin by organosilicon, saves backup.
Embodiment 2 prepares component A
1. fill a prescription:
In the component A of every 100 mass parts, the obtained modified resin 10 parts of epoxy resin E5120 part, embodiment 1, pigment titanium white R-90210 part, filler comprise process white 25 parts and talcum powder 20 parts, auxiliary agent comprises dispersant B YKATU1 part, defoamer AFCONA27220.5 part, organobentonite G-19581 part and aerosil R-9720.5 part, mixed solvent (mass ratio be the dimethylbenzene of 2:1 and butanols mixture) 12 parts.
2. preparation method
In dispersion tank, add epoxy resin, solvent, dispersion agent, defoamer, add organobentonite and aerosil after stirring, high-speed stirring 15min, organobentonite and aerosil are fully soaked and dispersion.Then add titanium dioxide, talcum powder, process white respectively, after stirring, move in sand mill, discharging when being 40 μm through grinding distribution to the fineness of slurry, slowly adds modified resin, stirs, filters, packs in this slurry, obtained component A, saves backup.
Embodiment 3 prepares B component
1. fill a prescription:
In the B component of every 100 mass parts, polymeric amide (Versmidev-140, cognis) 50 parts, aminosiloxane resin (DOWCORNING
) 12 parts, mixed solvent (mass ratio be the dimethylbenzene of 2:1 and butanols mixture) 38 parts.
2. preparation method
Added by mixed solvent in dispersion tank, add polymeric amide and aminosiloxane resin successively, stir under stirring, filter, packaging, obtains B component, saves backup.
Embodiment 4 prepares Siloxane hybrid anticorrosive paint
During use, first component A obtained for embodiment 2 and embodiment 3 are obtained after B component stirs respectively, take component A and B component by mass parts respectively than for 100:20, remix also stirs, and then slaking 15 ~ 30min can carry out application.
Comparative example 1 prepares the component A of comparative example high-solid epoxy resin anticorrosive coating
1. (not using modified resin) is filled a prescription
In the Comparative examples A component of every 100 mass parts, epoxy resin E5126 part, pigment titanium white R-90210 part, filler comprises process white 25 parts and talcum powder 20 parts, auxiliary agent comprises dispersant B YKATU1 part, defoamer AFCONA27220.5 part, organobentonite G-19581 part and aerosil R-9720.5 part, mixed solvent (mass ratio be the dimethylbenzene of 2:1 and butanols mixture) 16 parts.
2. preparation method
In dispersion tank, add epoxy resin, solvent, dispersion agent, defoamer, add organobentonite and aerosil after stirring, high-speed stirring 15min, organobentonite and aerosil are fully soaked and dispersion.Then add titanium dioxide, talcum powder, process white respectively, after stirring, move in sand mill, when being 40 μm through grinding distribution to the fineness of slurry, discharging, filtration, packaging, obtained Comparative examples A component, saves backup.
Comparative example 2 prepares the B component of comparative example high-solid epoxy resin anticorrosive coating
1. (not using aminosiloxane resin) is filled a prescription
In the comparative example B component of every 100 mass parts, polymeric amide (Versmidev-140, cognis) 50 parts, mixed solvent (mass ratio be the dimethylbenzene of 2:1 and butanols mixture) 50 parts.
2. preparation method
Added by mixed solvent in dispersion tank, add polymeric amide, stir under stirring, filter, packaging, obtains comparative example B component, saves backup.
Comparative example 3 prepares comparative example high-solid epoxy resin anticorrosive coating
During use, first component A obtained for comparative example 1 and the obtained B component of comparative example 2 are stirred respectively, take component A and B component by mass parts respectively than for 100:20, remix after stirring, slaking 15 ~ 30min can carry out application.
detect coating property
(1) performance of coating own is detected
1. method
Snappiness is pressed GB/T1731-1993 and is measured, and test plate (panel) is tinplate, coating thickness 20 ± 3 μm;
Shock test presses GB/T1732-1993, and test plate (panel) is tinplate, thickness 20 ± 3 μm;
Pull open method adhesion test by GB/T5210-2006, test plate (panel) is sandblasting steel plate, thickness 320 ± 20 μm.
2. detected result is in table 1.
Table 1
As shown in Table 1, Siloxane hybrid anticorrosive paint of the present invention (embodiment 4 is made) employs modified resin in technical scheme containing epoxy group(ing) due to component A, and with by polymeric amide, DOWCORNING
the B component that aminosiloxane resin is formed coordinates, and make coating have good mechanical property to impact 50cm, snappiness 1mm, sticking power 16Mpa, its film performance reaches the level of current high-solid epoxy resin anticorrosive coating (comparative example 3 is made).
(2) matching property of coating and coating system is detected
1. sample making
Test plate (panel) for the matching performance detecting embodiment and comparative example paint coatings system is the thick sandblasting steel plate of 3 ~ 5mm;
A) model of non-zinc-rich coating system
Form painting system by priming paint, intermediate coat and finish paint, described each layer all adopts identical coating, i.e. embodiment 4 or the obtained coating of comparative example 3, and every coating all sprays twice, the build of coating system 320 ± 20 μm;
B) model of zinc-rich coating system
With MC-SP-2 alcohol insoluble inorganic zinc rich primer for priming paint, the coating that embodiment 4 or comparative example 3 obtain is that intermediate coat and finish paint form coating system, its dry film Zn content >80% after basecoat paint, thickness 90 μm, then intermediate coat and finish paint is sprayed successively, the build of coating system 320 ± 20 μm.
2. detection method
Resistance to salt water test is undertaken by GB/T1763;
Circulation weathering test is undertaken by the appendix A of ISO20340-2009.
Pull open method sticking power to place after salt water resistance and circulation weathering test and test for 2 weeks, test and undertaken by GB/T5210-2006;
3. detected result
A) non-zinc-rich coating system model
Use the model of Siloxane hybrid anticorrosive paint (embodiment 4 is made):
Initially pull open method sticking power 16Mpa;
Resistance to salt water test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 11Mpa;
Circulation weathering test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 13.6Mpa, monolateral expansion erosion 7.5mm;
Use the model of comparative example high-solid epoxy resin anticorrosive coating (comparative example 3 is made):
Initially pull open method sticking power 16.4Mpa;
Resistance to salt water test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 11.2Mpa;
Circulation weathering test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 8.1Mpa, monolateral expansion erosion 13.7mm;
From above-mentioned detected result:
Siloxane hybrid anticorrosive paint of the present invention (embodiment 4) is in non-zinc-rich coating system, as the priming paint of coating system, intermediate coat and finish paint, this coating system has excellent sticking power and erosion resistance, especially resistance to expansion erosion performance is good, monolateral expansion erosion is 7.5mm, reach that ISO20340 requires≤technical indicator of 8mm, be suitable for ocean environment steel construction protection;
Comparative example high-solid epoxy resin anticorrosive coating (comparative example 3 is made) is in non-zinc-rich coating system, and as the priming paint of coating system, intermediate coat and finish paint, the initial adhesion 16.4MPa of this coating system, salt water resistance performance might as well.But the performance of the cycle weathering test of coating system is not good: the sticking power of coating is down to 8.1Mpa, decline obviously, monolateral expansion erosion reaches 13.7mm, higher than in ISO20340≤technical requirements of 8mm.This shows that modified resin has obvious effect.
B) zinc-rich coating system model
Use the model of Siloxane hybrid anticorrosive paint (embodiment 4 is made):
Initially pull open method sticking power 12.8Mpa;
Resistance to salt water test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 10.5Mpa;
Circulation weathering test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 13.3Mpa, monolateral expansion erosion 2.8mm;
Use the model of comparative example high-solid epoxy resin anticorrosive coating (comparative example 3 is made):
Initially pull open method sticking power 13.5Mpa;
Resistance to salt water test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 8.2Mpa;
Circulation weathering test (4200 hours) outward appearance is non-foaming, non-corrosive; Pull open method sticking power 8.9Mpa, monolateral expansion erosion 4.2mm;
From above-mentioned detected result:
Siloxane hybrid anticorrosive paint of the present invention (embodiment 4) is in zinc-rich coating system, as intermediate coat and finish paint, zinc-rich coating shows excellent sticking power, circulation weathering test 4200h sticking power does not reduce and raises on the contrary, coating has rear strengthening effect, the technical characterstic of this silicone hybrid coating just.Coating system resists corrosion, and to spread performance very excellent, monolateral expansion erosion 2.8mm, to reach in ISO20340≤the technical requirements of 3mm, Siloxane hybrid anticorrosive paint of the present invention is used on zinc rich primer, the electro-chemical protection of inorganic zinc coating can be given full play to, the monolateral expansion erosion of coating is little, proves that Siloxane hybrid anticorrosive paint of the present invention can support the use as intermediate coat and zinc rich primer;
Comparative example high-solid epoxy resin anticorrosive coating (comparative example 3 is made) is in zinc-rich coating system, as intermediate coat and finish paint, this coating system is obviously loss of adhesion through salt water resistant test and circulation weathering test coating, prove that the attachment fastness of this coating on zinc rich primer is inadequate, monolateral expansion erosion also obviously exceeds the standard range of ISO20340, is starkly lower than the corresponding performance of coating of the present invention.
Claims (4)
1. a Siloxane hybrid anticorrosive paint composition, is characterized in that, is made up of component A and B component, and component A is 100:20 with the mass parts ratio of B component;
Component A is by epoxy resin, modified resin, pigment, filler, auxiliary agent and solvent composition, in the component A of every 100 mass parts, epoxy resin 20 parts, modified resin 8 ~ 12 parts, pigment and filler 50 ~ 55 parts, auxiliary agent 1 ~ 3 part, surplus are mixed solvent, wherein, epoxy resin be low-molecular-weight bisphenol A-type or bisphenol-f type liquid epoxy one or more, modified resin is modifying epoxy resin by organosilicon, it is to contain tetraethoxy 42 parts in every 100 mass parts materials, phenyltrimethoxysila,e 8 parts, gamma-amino propyl trialkoxy silane 4.5 parts, 4 parts, water, hydrochloric acid 1.5 parts, Virahol 25 parts, E-51 epoxy resin 10 parts and 5 parts, acetone are raw material, by tetraethoxy, phenyltrimethoxysila,e, Virahol adds in reaction vessel, be warming up to 40 DEG C, start the mixture dripping hydrochloric acid and water, after 1h dropwises, at 60 ~ 70 DEG C of insulation 4h, then gamma-amino propyl trialkoxy silane is added, insulation 1h, formed containing amino silicone resin, add the solution of epoxy resin and acetone again under stirring in batches, continue stirring reaction 4h, normal temperature is cooled to obtain,
B component is made up of polymeric amide, aminosiloxane resin, organic solvent, in the B component of every 100 mass parts, polymeric amide 50 parts, aminosiloxane resin 10 ~ 15 parts, surplus are mixed solvent, and wherein, polymeric amide is the low polymerization degree product of dimeracid and the many ammonia of many ethene; Aminosiloxane resin is DOWCORNING
2. Siloxane hybrid anticorrosive paint composition according to claim 1, is characterized in that, the epoxy resin in described component A is one or more in E51, E44, F51; Pigment is one or more in titanium dioxide, carbon black, medium chrome yellow medium yellow, phthalocyanine blue; Filler is one or more in talcum powder, calcium carbonate, barium sulfate, silica powder, mica powder, Feldspar Powder, wollastonite powder, molochite; Auxiliary agent is one or more in dispersion agent, defoamer, thixotropic agent, anti-settling agent.
3. Siloxane hybrid anticorrosive paint composition according to claim 1, is characterized in that, the polymeric amide in described B component is the one in Versmidev-140, BS850A, 350A, and its amine value is at 300 ~ 400mgKOH/g.
4. Siloxane hybrid anticorrosive paint composition according to claim 1, is characterized in that, the mixed solvent used in component A and B component be dimethylbenzene and butanols mixture, both mass ratioes are 2:1.
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| US10273371B2 (en) * | 2016-07-25 | 2019-04-30 | Basf Coatings Gmbh | Method of forming a slurry of encapsulated pigment for an aqueous topcoat coating composition |
| CN107974163A (en) * | 2017-11-21 | 2018-05-01 | 马鞍山天宇船舶制造有限公司 | A kind of preparation method of the composite modified wear-and corrosion-resistant type epoxy coating of nano-particle-hydridization Ludox |
| CN109354971A (en) * | 2018-10-22 | 2019-02-19 | 福州臻美网络科技有限公司 | A kind of corrosion-resistant epoxy coating for building |
| CN111484619A (en) * | 2020-04-15 | 2020-08-04 | 浙江省天然气开发有限公司 | Silane prepolymer, anticorrosive coating and application thereof |
| CN112341932A (en) * | 2020-10-29 | 2021-02-09 | 湖南省德谦新材料有限公司 | Antifouling weather-resistant polysiloxane coating |
| CN113045919B (en) * | 2021-03-23 | 2022-04-05 | 石家庄市油漆厂 | Low-temperature curing high-solid epoxy coating and preparation method thereof |
| CN116162366B (en) * | 2021-11-25 | 2023-12-26 | 中海油常州涂料化工研究院有限公司 | Water-based inorganic zinc silicate paint and preparation method thereof |
| CN114045051A (en) * | 2021-12-07 | 2022-02-15 | 常州威斯敦粘合材料有限责任公司 | Environment-friendly high-performance marble coating and preparation method thereof |
| CN115637094B (en) * | 2022-10-24 | 2023-11-10 | 中昊北方涂料工业研究设计院有限公司 | Cast magnesium alloy protective coating system and preparation and use methods thereof |
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| CN102101964B (en) * | 2011-01-06 | 2012-10-03 | 杭州油漆有限公司 | Organic silicon modified epoxy heat-resistant and anti-corrosive coating and preparation method thereof |
| CN102816521B (en) * | 2011-06-10 | 2015-05-13 | 中国石油天然气集团公司 | Long-term corrosion resistance coating for ocean platform steel structure in atmospheric region and manufacture method thereof |
| CN102634262B (en) * | 2012-04-20 | 2014-11-05 | 中国海洋石油总公司 | Modified epoxy ballast tank paint |
| CN103013276B (en) * | 2012-11-30 | 2015-04-22 | 无锡市虎皇漆业有限公司 | Epoxy universal primer for ships and preparation method thereof |
| CN103289531A (en) * | 2013-07-02 | 2013-09-11 | 长沙盛康高分子材料科技有限公司 | Underwater coating anti-pollution and anti-corrosion epoxy coating and preparation method thereof |
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Address after: Chinese CNOOC Building No. 25 Beijing 100010 Dongcheng District Chaoyangmen North Street, room 1414 Applicant after: China National Offshore Oil Corporation Applicant after: CNOOC CHANGZHOU PAINT CHEMICAL RESEARCH INSTITUTE CO., LTD. Applicant after: CNOOC Energy Development Co., Ltd. Applicant after: CNOOC Changzhou EP Coating Co., Ltd. Address before: Chinese CNOOC Building No. 25 Beijing 100010 Dongcheng District Chaoyangmen North Street, room 1414 Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Changzhou Paint & Coatings Industry Research Institute Applicant before: CNOOC Energy Development Co., Ltd. Applicant before: CNOOC Changzhou EP Coating Co., Ltd. |
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Address after: China CNOOC Building No. 25 Beijing 100010 Dongcheng District Chaoyangmen North Street, room 1414 Co-patentee after: CNOOC CHANGZHOU PAINT CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Co-patentee after: CNOOC CHANGZHOU EP COATING Co.,Ltd. Address before: China CNOOC Building No. 25 Beijing 100010 Dongcheng District Chaoyangmen North Street, room 1414 Co-patentee before: CNOOC CHANGZHOU PAINT CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Co-patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Co-patentee before: CNOOC CHANGZHOU EP COATING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |