CN103788875B - Metal rustproof protective agent and preparation method thereof - Google Patents

Metal rustproof protective agent and preparation method thereof Download PDF

Info

Publication number
CN103788875B
CN103788875B CN201210433559.4A CN201210433559A CN103788875B CN 103788875 B CN103788875 B CN 103788875B CN 201210433559 A CN201210433559 A CN 201210433559A CN 103788875 B CN103788875 B CN 103788875B
Authority
CN
China
Prior art keywords
protective agent
metal
fatty
added
antirust protective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201210433559.4A
Other languages
Chinese (zh)
Other versions
CN103788875A (en
Inventor
赵永鹤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
Original Assignee
China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Fushun Research Institute of Petroleum and Petrochemicals filed Critical China Petroleum and Chemical Corp
Priority to CN201210433559.4A priority Critical patent/CN103788875B/en
Publication of CN103788875A publication Critical patent/CN103788875A/en
Application granted granted Critical
Publication of CN103788875B publication Critical patent/CN103788875B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
  • Lubricants (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

The invention discloses a metal rustproof protective agent and a preparation method thereof. The protective agent is prepared by emulsification of a wax substance, synthetic resin, fatty acid, fatty amine, a metal corrosion inhibitor, a surfactant, a preservative and water according to a specific ratio. The preparation method includes: preparing an aqueous substance and an oil phase substance respectively, and then conducting mixing dispersion emulsification, thus obtaining the final metal rustproof protective agent. With the characteristics of convenient coating and strong adhesion, the metal rustproof protective agent is easy to clean during metal sheet after-treatment, and is a green and environment-friendly type rustproof protective agent. The rustproof protective agent still has good adhesion at high temperature, can be repeatedly heated for use during coating metals, foils and other metal mechanical equipment parts, and overcomes the defect that ordinary emulsion products or common anti-rust oil products are unable to coat or difficult to coat at high temperature.

Description

A kind of metal antirust protective agent and preparation method thereof
Technical field
The present invention relates to a kind of metal antirust protective agent and preparation method thereof, it is adaptable to various steel plates, foil, metal device The short-term rust prevention protection of part, plant equipment object.
Background technology
Various cold rolling, hot rolling iron and steel sheet and plates, some metal foils and some plant equipment are very fast to prevent after completing Corrosion is produced, and typically one layer of rust-inhibiting materials will be applied on its surface, corrosion not occurred using front to protect metal, affecting its matter Measure and be worth, on the other hand the protective layer can also play certain protective action to metal surface, prevent slight scuffing.At present The short-term rust prevention of metallic plate, foil and steel machinery part of appliance is all to apply one layer of antirust oil or rust-proofing wax material.Though antirust oil There is good short-term rust prevention effect.But it is oily matter, when front cleaning treatment is used in the later stage, the pollution of meeting generation environment, is this People have carried out the research and development of water-based antirust, and water-based antirust is not typically contained or few oiliness material, and cleaning treatment is easy Convenient, the waste water of generation is few and disposable.Thus water-base metal antirust agent is the widely studied problem in the field over recent year, The new product and new technique of invention also compares many.CN1386812A discloses a kind of antirust liquid wax for automobile, and the patent is used Traditional method, dissolves various required compositions with solvent naphtha, and although product has certain rustless property, but due to containing solvent naphtha, There is solvent odor during use, there is defect disagreeableness to environment.CN1488699A discloses a kind of water-based metal antirust Protective agent, due to barium mahogany sulfonate composition used in product, makes the product have certain toxicity.CN101104774A discloses one Metal rust-proofing wax is planted, with Wax as main basic substance, the protecting film of product does not have toughness.CN1386812A discloses one Antirust agent is planted, main component is petroleum wax substance and petroleum solvent, rustless property and other performance existing defects, and to environment It is unfriendly.
The content of the invention
For the deficiencies in the prior art, the invention provides a kind of rust-proof effect is good, smear adhesion in metal surface holding Easily, and it is easy to environment-friendly type metal antirust protective agent of metal cleaning treatment and preparation method thereof.
The metal antirust protective agent of the present invention, is made up of following ingredients, in mass:
Wax 8%~16%
Resin 2%~4%
Fatty acid 6%~10%
Fatty amine 3%~5%
Metal inhibitor 4%~8%
Surfactant 4%~8%
Distilled water surplus.
Metal antirust protective agent of the present invention, wherein described Wax is molecular weight be 1000~2000 oxygen Change one or more in Tissuemat E, 80~No. 85 oxidized microcrystalline waxs, 60~No. 70 oxidized paraffin waxs.
Metal antirust protective agent of the present invention, wherein it is 70~100 DEG C of oil tree that described resin is softening point Fat, rosin resin, it is glycerin abietate modified in one or more.
Metal antirust protective agent of the present invention, wherein described fatty acid is chain saturated fatty acids, can be hard Fat acid and/or palmitic acid.
Metal antirust protective agent of the present invention, wherein described fatty amine is butanediamine, hexamethylene diamine, hexylamine, just pungent Amine, one or more in octodrine, certain herbaceous plants with big flowers amine.
Metal antirust protective agent of the present invention, wherein described metal inhibitor be bi-imidazoline quaternary ammonium salt, 17 One or more in thiazolinyl bi-imidazoline quaternary ammonium salt, oily acid based imidazolines.
Metal antirust protective agent of the present invention, wherein described surfactant can be lauryl amine, 16 Alkylamine, octadecylamine, Polyethylene oxide(20)Sorbitan monostearate, fatty alcohol-polyoxyethylene ether(Peregal)With One or more in morpholine.
The preparation method of metal antirust protective agent of the present invention comprises the steps:
(1)Fatty acid is weighed according to proportioning to be added in container, 80 DEG C~120 DEG C are heated to;
(2)Fatty amine and distilled water are weighed according to proportioning, fatty amine is added in distilled water and 80 DEG C~96 are heated to ℃;
(3)By step(2)Resulting solution is added slowly with stirring step(1)In fatty acid in react 30~60 points Clock, adds surfactant and is heated to 80~95 DEG C of prepared aqueous-phase material material;
(4)Wax, resin, metal inhibitor are added in container according to proportioning, are slowly heated to 110~140 DEG C and react 20~50 minutes and make oil phase material;
(5)Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred after the completion of mixing and emulsifying again Mix and stablize 20~40 minutes, then homogenizing cooling, as final metal antirust protective agent product.
Metal antirust protective agent of the present invention can be used as the short-term rust prevention of steel plate, foil and metal machinery part of appliance Protective agent.
The present invention selects Wax and resin to do the film forming matter of antirust agent, is characterized in that Wax itself has one Fixed hydrophobicity, resin have certain toughness or plasticity, antirust protective film can be made to have certain hydrophobicity and intensity, and make to prevent Rust material forms good absorption protective layer with target piece surface, prevents or slow down the etch of acid, alkali, salt material to object. Make rust-inhibiting materials from imidazoline ammonium salts substances, it is because such material is nontoxic or small toxicity, environmentally friendly, make the nontoxic nothing of product Taste.On the coated ferrous metal surface of the antirust protective agent, the absorption that certain toughness and intensity can be formed with target piece is prevented Rust protecting film, overcomes general water-based antirust and the difficult defect of adhesion is smeared to metal, clean when having metal post processing again The characteristics of facilitating.Selected fatty acid and fatty amine reactant aqueous solution make the material with gelinite performance, then with other oil phases Material emulsifying obtain final products, it is ensured that the product at high temperature still have preferable adhesiveness, can metal, foil and its Its metal machinery part of appliance is heated up when coated use repeatedly, overcomes general product emulsion or conventional antirust oil product in temperature Degree can not be more coated when higher or be difficult coated defect.
Specific embodiment
Illustrate the metal antirust protective agent of the present invention below with specific embodiment, percentage ratio therein is mass fraction.
Embodiment 1
4% OPE A28(South Africa SASOL companies produce);
4% oxidized microcrystalline wax 80 (Fushun Petrochemical Research Institute's production);
2.5% hydrogenated rosin(Hunan Lin Ben chemical companies):
8% stearic acid 1801(Jiangsu Rugao oils and fatss company);
4.5% hexamethylene diamine (Zibo great Run Chemical Co., Ltd.s);
6% bi-imidazoline quaternary ammonium salt(Win Chemical Co., Ltd. in Qinhuangdao);
2% 17 thiazolinyl bi-imidazoline quaternary ammonium salt (win Chemical Co., Ltd. in Qinhuangdao);
4% peregal A-20(Fushun Chemical Co., Ltd. of Konka produces);
Distilled water surplus.
Fatty acid is heated to into 80 DEG C first, then is taken during fatty amine is added to distilled water and is heated to 90 DEG C, fatty amine is being stirred Mix down and react 50 minutes in being slowly added into the fatty acid of heat, add surfactant and be heated to 80 DEG C of prepared aqueous-phase materials Material.Wax, resin, metal inhibitor are added in container by proportioning and are slowly heated to 120 DEG C of reactions and are made for 30 minutes Oil phase material.Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying Stablize 20 minutes, then homogenizing cooling, a kind of metal antirust protective agent product as of the invention.
Embodiment 2:
10% oxidized microcrystalline wax 85 (Fushun Petrochemical Research Institute's production);
3% Petropols P80 (it is by chemical company that Shanghai gold is gloomy);
6% stearic acid 1801(Jiangsu Rugao oils and fatss company);
3% palmitic acid(The Ministry of Chemical Industry of Duo Lijia trade Co., Ltds of jiangsu wuxi city professional production);
2% hexamethylene diamine (Zibo great Run Chemical Co., Ltd.s);
3% 1-Aminooctane(Shanghai Ling Er Chemical Co., Ltd.s);
4% bi-imidazoline quaternary ammonium salt(Win Chemical Co., Ltd. in Qinhuangdao);
5% peregal A-20(Fushun Chemical Co., Ltd. of Konka produces);
Distilled water surplus.
Fatty acid is heated to into 86 DEG C first, is taken during fatty amine is added to distilled water and is heated to 88 DEG C, by fatty amine in stirring Under be slowly added into heat fatty acid in react 40 minutes, add surfactant and be heated to 90 DEG C of prepared aqueous-phase material material. Wax, resin, metal inhibitor are added in container by proportioning and are slowly heated to 132 DEG C of reactions and are made oil phase in 28 minutes Material.Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying stable 26 minutes, then homogenizing cooling, a kind of metal antirust protective agent product as of the invention.
Embodiment 3
8% OPE A28(South Africa SASOL companies produce);
4% petroleum oxidate microwax 80(Fushun Petrochemical Research Institute produces);
3.5% hydrogenated rosin(Hunan Lin Ben chemical companies):
8% stearic acid 1801(Jiangsu Rugao oils and fatss company);
2% palmitic acid(The Ministry of Chemical Industry of Duo Lijia trade Co., Ltds of jiangsu wuxi city professional production)
3% hexamethylene diamine(Zibo great Run Chemical Co., Ltd.s);
5% bi-imidazoline quaternary ammonium salt(Win Chemical Co., Ltd. in Qinhuangdao);
6% morpholine(Kai Tong Fine Chemical Co., Ltd of Wuhan City produces);
Distilled water surplus.
Fatty acid is heated to into 84 DEG C first, is taken during fatty amine is added to distilled water and is heated to 92 DEG C, by fatty amine in stirring Under be slowly added into heat fatty acid in react 54 minutes, add surfactant and be heated to 86 DEG C of prepared aqueous-phase material material. Wax, resin, metal inhibitor are added in container by proportioning and are slowly heated to 126 DEG C of reactions and are made oil phase in 35 minutes Material.Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying stable 25 minutes, then homogenizing cooling, a kind of metal antirust protective agent product as of the invention.
Embodiment 4
7% OPE A28(South Africa SASOL companies produce);
7% oxidized paraffin wax 70(Fushun Petrochemical Research Institute produces);
4% Petropols P80 (it is by chemical company that Shanghai gold is gloomy);
6% stearic acid 1801(Jiangsu Rugao oils and fatss company);
2.5% butanediamine(Ten thousand four seas chemical industry of Zhengzhou);
1% certain herbaceous plants with big flowers amine(Shanghai Ling Er Chemical Co., Ltd.s);
5% 17 thiazolinyl bi-imidazoline quaternary ammonium salt (win Chemical Co., Ltd. in Qinhuangdao);
1% bi-imidazoline quaternary ammonium salt(Win Chemical Co., Ltd. in Qinhuangdao);
7% morpholine(Kai Tong Fine Chemical Co., Ltd of Wuhan City produces);
Distilled water surplus.
Fatty acid is heated to into 88 DEG C first, is taken during fatty amine is added to distilled water and is heated to 98 DEG C, by fatty amine in stirring Under be slowly added into heat fatty acid in react 58 minutes, add surfactant and be heated to 88 DEG C of prepared aqueous-phase material material. Wax, resin, metal inhibitor are added in container by proportioning and are slowly heated to 127 DEG C of reactions and are made oil phase in 27 minutes Material.Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying stable 28 minutes, then homogenizing cooling, a kind of metal antirust protective agent product as of the invention.
Embodiment 5
8% OPE A28(South Africa SASOL companies produce);
8% oxidized microcrystalline wax 85(Fushun Petrochemical Research Institute produces);
2% hydrogenated rosin(Hunan Lin Ben chemical companies);
7% stearic acid 1801(Jiangsu Rugao oils and fatss company);
4% hexamethylene diamine(Zibo great Run Chemical Co., Ltd.s);
4% 17 thiazolinyl bi-imidazoline quaternary ammonium salt (win Chemical Co., Ltd. in Qinhuangdao);
3% bi-imidazoline quaternary ammonium salt(Win Chemical Co., Ltd. in Qinhuangdao);
1% octadecylamine(Chinese daily chemical industry institute Taiyuan Fa Kai chemical companies production);
7% peregal A-20(Fushun Chemical Co., Ltd. of Konka produces);
Distilled water surplus.
Fatty acid is heated to into 89 DEG C first, is taken during fatty amine is added to distilled water and is heated to 89 DEG C, by fatty amine in stirring Under be slowly added into heat fatty acid in react 57 minutes, add surfactant and be heated to 87 DEG C of prepared aqueous-phase material material. Wax, resin, metal inhibitor are added in container by proportioning and are slowly heated to 138 DEG C of reactions and are made oil phase in 40 minutes Material.Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying stable 39 minutes, then homogenizing cooling, a kind of metal antirust protective agent product as of the invention.
Tests below result illustrates the applicable cases of embodiment:
1 iron and steel cold rolled sheet corrosion protection result of the test of table
Sample Humidity resistance(My god) Resistance to rust(Point) Resistance to washability
Embodiment 1 150 31 Well
Embodiment 2 160 26 Well
Embodiment 3 155 27 Well
Embodiment 4 153 28 Well
Embodiment 5 156 26 Well
It is blank 100 0
Result of the test illustrates that product of the present invention has good rust-preventing characteristic and property easy to clean.

Claims (7)

1. a kind of metal antirust protective agent, it is characterised in that:Include in mass:
Wax 8%~16%
Resin 2%~4%
Fatty acid 6%~10%
Fatty amine 3%~5%
Metal inhibitor 4%~8%
Surfactant 4%~8%
Distilled water surplus;
The fatty amine is butanediamine, hexamethylene diamine, hexylamine, 1-Aminooctane, octodrine, one or more in decyl amine, the fat Acid is chain saturated fatty acids.
2. according to the metal antirust protective agent described in claim 1, it is characterised in that:Described Wax is that molecular weight is One or more in 1000~2000 OPE, 80~No. 85 oxidized microcrystalline waxs, 60~No. 70 oxidized paraffin waxs.
3. according to the metal antirust protective agent described in claim 1, it is characterised in that:Described resin is softening point for 70~ 100 DEG C of Petropols, rosin resin, it is glycerin abietate modified in one or more.
4. according to the metal antirust protective agent described in claim 1, it is characterised in that:The chain saturated fatty acids are stearic acid And/or palmitic acid.
5. according to the metal antirust protective agent described in claim 1, it is characterised in that:The metal inhibitor is bi-imidazoline season One or more in ammonium salt, 17 thiazolinyl bi-imidazoline quaternary ammonium salts, oily acid based imidazolines.
6. according to the metal antirust protective agent described in claim 1, it is characterised in that:The surfactant is dodecyl Amine, hexadecylamine, octadecylamine, Polyethylene oxide(20)Sorbitan monostearate, fatty alcohol-polyoxyethylene ether, One or more in quinoline.
7. in claim 1~6 arbitrary metal antirust protective agent preparation method, comprise the steps:
(1)Fatty acid is weighed according to proportioning to be added in container, 80 DEG C~120 DEG C are heated to;
(2)Fatty amine and distilled water are weighed according to proportioning, fatty amine is added in distilled water and 80 DEG C~96 DEG C are heated to;
(3)By step(2)Gained fatty amine is added slowly with stirring step(1)In fatty acid in react 30~60 points Clock, adds surfactant and is heated to 80~95 DEG C of prepared aqueous-phase material material;
(4)Wax, resin, metal inhibitor are added in container according to proportioning, are slowly heated to 110~140 DEG C simultaneously Reaction makes oil phase material in 20~50 minutes;
(5)Oil phase material is added to mixing and emulsifying under high velocity agitation in aqueous-phase material material, is stirred for after the completion of mixing and emulsifying steady It is fixed 20~40 minutes, then homogenizing cooling, as final metal antirust protective agent product.
CN201210433559.4A 2012-11-05 2012-11-05 Metal rustproof protective agent and preparation method thereof Active CN103788875B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210433559.4A CN103788875B (en) 2012-11-05 2012-11-05 Metal rustproof protective agent and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210433559.4A CN103788875B (en) 2012-11-05 2012-11-05 Metal rustproof protective agent and preparation method thereof

Publications (2)

Publication Number Publication Date
CN103788875A CN103788875A (en) 2014-05-14
CN103788875B true CN103788875B (en) 2017-04-12

Family

ID=50664947

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210433559.4A Active CN103788875B (en) 2012-11-05 2012-11-05 Metal rustproof protective agent and preparation method thereof

Country Status (1)

Country Link
CN (1) CN103788875B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105296104A (en) * 2015-10-21 2016-02-03 和县科嘉阀门铸造有限公司 Rust-preventative oil for valve factory packaging
CN105542643A (en) * 2015-12-11 2016-05-04 江苏国泰环境监测有限公司常熟分公司 Oil-smoke detection device
CN105482688A (en) * 2015-12-11 2016-04-13 江苏国泰环境监测有限公司常熟分公司 Sulfide detection device
CN105419525A (en) * 2015-12-11 2016-03-23 江苏国泰环境监测有限公司常熟分公司 Exhaust gas detection device
CN105348978A (en) * 2015-12-11 2016-02-24 江苏国泰环境监测有限公司常熟分公司 Tail-gas detection device
CN106118197B (en) * 2016-07-01 2018-02-13 新疆中鼎致远节能设备有限公司 Anticorrosion of flue duct erosion agent and its preparation method and application
CN106244309B (en) * 2016-07-29 2019-07-02 苏州海迈汽车防护材料有限公司 A kind of bicontinuous antirust emulsion and preparation method thereof
CN106281625B (en) * 2016-08-05 2019-07-02 苏州海迈汽车防护材料有限公司 A kind of high oil phase content antirust emulsion and preparation method
CN110819232B (en) * 2018-08-07 2022-09-09 深圳市福瑞特新材料有限公司 Stone care agent containing modified natural rosin resin and preparation method thereof
CN109161262A (en) * 2018-09-20 2019-01-08 南通市康桥油脂有限公司 A kind of grease instrument antirust protective agent
WO2020118468A1 (en) * 2018-12-09 2020-06-18 张维维 Novel protective antirust agent for petroleum research instruments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1197927C (en) * 2002-10-10 2005-04-20 中国石油化工股份有限公司 Water-based metal antirust protective agent
CN1331970C (en) * 2004-10-29 2007-08-15 中国石油化工股份有限公司 Water-based rust-proofing protecting wax agent and its preparation method
CN101104774A (en) * 2007-08-06 2008-01-16 金京 Metal rust-proofing wax and method for manufacturing same
CN101418186B (en) * 2007-10-26 2010-12-01 中国石油化工股份有限公司 Water-based rust proof protection treating wax agent

Also Published As

Publication number Publication date
CN103788875A (en) 2014-05-14

Similar Documents

Publication Publication Date Title
CN103788875B (en) Metal rustproof protective agent and preparation method thereof
CN102660364B (en) Non-phosphorus non-silicon aluminum alloy cutting fluid and preparation method thereof
CN100554389C (en) Surface lubrication treatment process and this surface treated steel plate of the zinc-based metal plated steel sheet of lubricating aqueous polyurethane resin combination, use said composition
CN102732365B (en) Aqueous environment-friendly cutting fluid synergized by functional ionic liquid and method for preparing same
CN105602689A (en) Environmentally-friendly and degradable water-based fully-synthetic cutting fluid and preparation method thereof
CN101724464B (en) Preparation method of oil soluble hydrogenation corrosion inhibitor for hydrogenation and reforming device
CN102758210A (en) Aircraft anticorrosion oil cleaning agent
CN104136592A (en) Water-soluble lubricating agent for plastic working, metal material for plastic working, and worked metal article
CN104479833A (en) High-efficiency safe environment-friendly all-synthetic cutting fluid and preparation method thereof
US4233176A (en) Non-petroleum based metal corrosion inhibitor
CN105463472A (en) Water-soluble antirust agent
US2382699A (en) Slushing oil compositions
JPH10501578A (en) Corrosion protection composition for steel
WO2017028372A1 (en) Rust-removing-and-preventing colored heavy-anticorrosion single-component primer and production process thereof
TW500829B (en) Aqueous metal surface treating agent
CN104313589B (en) A kind of micro-emulsion type metal antirust solution and preparation method thereof
CN104213126B (en) A kind of rust preventive for metal surface and preparation method thereof
CN109161262A (en) A kind of grease instrument antirust protective agent
CN106367759B (en) Aluminium corrosion inhibiter and its preparation method and application
CN104404524A (en) Aqueous antirust agent for steel and preparation method thereof
CN104356828A (en) Water-based rust inhibitor for steel surfaces and preparation method thereof
CN109777564A (en) A kind of slushing compound and preparation method thereof
JPS5934746B2 (en) Primary rust prevention coating composition for metals
EP0020042B1 (en) Non-petroleum based metal corrosion inhibitor and a metal object coated therewith
TWI506131B (en) Quenched and tempered rolling solution, its preparation method and its use method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant