CN107011503A - Cashew pnenolic aldehyde amine epoxy curing agent and preparation method that a kind of thiocarbamide is modified - Google Patents

Cashew pnenolic aldehyde amine epoxy curing agent and preparation method that a kind of thiocarbamide is modified Download PDF

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Publication number
CN107011503A
CN107011503A CN201710357554.0A CN201710357554A CN107011503A CN 107011503 A CN107011503 A CN 107011503A CN 201710357554 A CN201710357554 A CN 201710357554A CN 107011503 A CN107011503 A CN 107011503A
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China
Prior art keywords
thiocarbamide
modified
curing agent
pnenolic aldehyde
amine
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CN201710357554.0A
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Chinese (zh)
Inventor
李伯平
惠正权
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Jiangsu Sanmu Chemical Co Ltd
Jiangsu Sanmu Group Corp
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Jiangsu Sanmu Chemical Co Ltd
Jiangsu Sanmu Group Corp
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Priority to CN201710357554.0A priority Critical patent/CN107011503A/en
Publication of CN107011503A publication Critical patent/CN107011503A/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/62Alcohols or phenols
    • C08G59/621Phenols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G14/00Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
    • C08G14/02Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
    • C08G14/04Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
    • C08G14/06Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
    • C08G14/08Ureas; Thioureas

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Epoxy Resins (AREA)
  • Lubricants (AREA)

Abstract

The invention discloses the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide is modified, it is made up of thiocarbamide, fatty amine, anacardol and formaldehyde.The present invention obtains optimal raw material by many experiments screening and constituted and proportioning and its optimal preparation technology, the present invention first pass through thiocarbamide fatty amine is modified, again with anacardol, formaldehyde reaction generation cashew pnenolic aldehyde amine hardener, due to there are long chain hydrocarbon groups in molecular structure in anacardol, the pliability of film after solidification can be improved, also the viscosity of curing agent can be significantly reduced, due to introducing thiocarbamide in the molecule, is obviously improved the low temperature curing properties of cashew pnenolic aldehyde amine.Test result indicates that, the cashew pnenolic aldehyde amine hardener that the present invention is prepared using preferred feedstock is a kind of low viscosity, and hypotoxicity, the excellent curing agent of low temperature curing properties achieves extraordinary unexpected technique effect compared with prior art.

Description

Cashew pnenolic aldehyde amine epoxy curing agent and preparation method that a kind of thiocarbamide is modified
Technical field
The present invention relates to a kind of curing agent, and in particular to a kind of viscosity is low, and toxicity is low, and low temperature is that curable thiocarbamide is modified Cashew pnenolic aldehyde amine epoxy curing agent and preparation method, belong to technical field of polymer materials.
Background technology
Epoxy resin has excellent adhesion strength and antiseptic property, is widely used in many fields.Epoxy Resin must be valuable with the use of ability with curing agent, and curing agent species mainly has polyamide, phenolic aldehyde amine, acid anhydrides etc..But it is sour Acid anhydride needs ability cured epoxy resin, polyamide and the general normal temperature curable epoxy resin of phenolic aldehyde amine under high temperature, but in low temperature When (less than 5 DEG C), curing reaction can not be all participated in well, reach that certain intensity needs long time, hardening time is long.Sulphur Urea can significantly reduce the solidification temperature of epoxy resin, there is the curing agent that thiocarbamide is modified with fatty amine, but molecular weight in the prior art Smaller, volatility is larger, still suffers from certain toxicity.Also there is the phenol prepared after thiocarbamide modified fatty amine with phenol, formaldehyde reaction Aldehyde amine hardener, but viscosity is larger, it has not been convenient to construct.
Therefore, on the basis of prior art, it would be highly desirable to research and develop a kind of small toxicity, viscosity is small, low temperature curing properties are good Epoxy hardener.
The content of the invention
Goal of the invention:The purpose of the present invention is that in view of the shortcomings of the prior art, screening raw material by many experiments, there is provided one Kind viscosity is low, and toxicity is low, and low temperature is the cashew pnenolic aldehyde amine epoxy curing agent that curable thiocarbamide is modified;Another mesh of the invention The preparation method for being to provide the epoxy hardener.
Technical scheme, to realize object above, the technical solution adopted by the present invention is:
The cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide is modified, it is characterised in that it is by thiocarbamide, fatty amine, anacardol It is made with formaldehyde.
Preferably, the cashew pnenolic aldehyde amine epoxy curing agent that a kind of above-described thiocarbamide is modified, it is by mol ratio For 1~2:1:1:1~3 waist thiocarbamide, fatty amine, anacardol and formaldehyde are made.
Preferably, the cashew pnenolic aldehyde amine epoxy curing agent that a kind of above-described thiocarbamide is modified, described fat Amine is ethylenediamine, diethylenetriamine, triethylene tetramine or TEPA;Described formaldehyde is the formaldehyde that volumetric concentration is 37% Solution or paraformaldehyde solid.
The preparation method for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide of the present invention is modified, it includes following step Suddenly:
(1) fatty amine and thiocarbamide are added in reaction bulb, under the protection of nitrogen, Hybrid Heating stirring, then heating rises Temperature is risen to 120~135 DEG C, then 1~3h of back flow reaction naturally cools to by temperature to 40~60 DEG C after thiocarbamide melts completely Room temperature, obtains thiocarbamide modified amine;
(2) the thiocarbamide modified amine for preparing anacardol and step (1) is sequentially added in reaction bulb, and Hybrid Heating is stirred Mix, be then heated to 40~60 DEG C, start that formalin is added dropwise;
(3) after formaldehyde completion of dropwise addition, 90~110 DEG C are heated to, continues 1~3h of insulation reaction, then vacuumizes and remove The water gone in system, obtains thiocarbamide and is modified cashew pnenolic aldehyde amine epoxy curing agent.
Preferably, the preparation side for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide of the present invention is modified Method, it comprises the following steps:
(1) fatty amine and thiocarbamide are added in reaction bulb, under the protection of nitrogen, Hybrid Heating stirring, then heating rises Temperature is risen to 125~135 DEG C, then back flow reaction 3h naturally cools to room by temperature to 45~55 DEG C after thiocarbamide melts completely Temperature, obtains thiocarbamide modified amine;
(2) the thiocarbamide modified amine for preparing anacardol and step (1) is sequentially added in reaction bulb, and Hybrid Heating is stirred Mix, be then heated to 50 DEG C, start that formalin is added dropwise, control the rate of addition of formaldehyde, and control temperature to be no more than 100 ℃;
(3) after formaldehyde completion of dropwise addition, 95~105 DEG C are heated to, continues insulation reaction 3h, then vacuumizes removing body Water in system, obtains thiocarbamide and is modified cashew pnenolic aldehyde amine epoxy curing agent.
Preferably, the preparation method for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of above-described thiocarbamide is modified, Formalin is the formalin or paraformaldehyde solution that volumetric concentration is 37%.
Preferably, the preparation method for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of above-described thiocarbamide is modified, The mol ratio of described waist thiocarbamide, fatty amine, anacardol and formaldehyde is 1~2:1:1:1~3.
Beneficial effect:Compared to the prior art, the present invention has the following advantages:
The present invention obtains optimal raw material by many experiments screening and constituted and proportioning and its optimal preparation technology, this hair It is bright first pass through thiocarbamide fatty amine is modified, again with anacardol, formaldehyde reaction generation cashew pnenolic aldehyde amine hardener, anacardol by There are long chain hydrocarbon groups in molecular structure, the pliability of film after solidification can be improved, the viscosity of curing agent can be also significantly reduced, Additionally, due to thiocarbamide is introduced in the molecule, it is obviously improved the low temperature curing properties of cashew pnenolic aldehyde amine.Experimental result Show, the cashew pnenolic aldehyde amine hardener that the present invention is prepared using preferred feedstock is a kind of low viscosity, hypotoxicity, low-temperature setting The curing agent of excellent performance, achieves extraordinary unexpected technique effect compared with prior art.
Embodiment
Embodiment 1
1st, a kind of thiocarbamide is modified cashew pnenolic aldehyde amine epoxy curing agent, and it includes following raw material:Thiocarbamide 76g, diethylenetriamine 103g, anacardol 304g, 37% formalin 81g.
2nd, thiocarbamide is modified the preparation method of cashew pnenolic aldehyde amine epoxy curing agent, and it comprises the following steps:
(1) the diethylenetriamine 103g of the weight and thiocarbamide 76g is added in reaction bulb, under the protection of nitrogen, mixed Close heating stirring;50 ± 5 DEG C are heated to, temperature is risen to 130 ± 5 DEG C after thiocarbamide melts completely;Back flow reaction 3h is naturally cold But to room temperature, that is, low viscosity, the thiocarbamide modified amine of buff are obtained;
(2) and then by anacardol 304g add in reaction bulb, Hybrid Heating stirring;Then 50 DEG C are warming up to, starts to be added dropwise 37% formalin 81g, controls the rate of addition of formaldehyde, temperature is no more than 100 DEG C;100 DEG C are then heated to continue to protect Temperature reaction 3h;
(3) after reaction terminates, weighed after vacuumizing away the water in system, cooling, obtain thiocarbamide and be modified cashew pnenolic aldehyde amine ring Oxygen curing agent 478g.
Embodiment 2
1st, a kind of thiocarbamide is modified cashew pnenolic aldehyde amine epoxy curing agent, and it includes following raw material:Thiocarbamide 76g, triethylene tetramine 146g, anacardol 304g, 37% formalin 81g.
2nd, thiocarbamide is modified the preparation method of cashew pnenolic aldehyde amine epoxy curing agent, and it comprises the following steps:
(1) diethylenetriamine 146g and thiocarbamide 76g is added in reaction bulb, under the protection of nitrogen, Hybrid Heating stirring; 50 ± 5 DEG C are heated to, temperature 130 ± 5 DEG C are risen to after thiocarbamide melts completely, back flow reaction 3h naturally cools to room temperature, i.e., Obtain low viscosity, the thiocarbamide modified amine of buff;
(2) and then by anacardol 304g add in reaction bulb, Hybrid Heating stirring;Then 50 DEG C are warming up to, starts to be added dropwise 37% formalin 81g, controls the rate of addition of formaldehyde, temperature is no more than 100 DEG C;100 DEG C are then heated to continue to protect Temperature reaction 3h;
(3) after reaction terminates, weighed after vacuumizing away the water in system, cooling, obtain thiocarbamide and be modified cashew pnenolic aldehyde amine ring Oxygen curing agent 521g.
Embodiment 3
1st, a kind of thiocarbamide is modified cashew pnenolic aldehyde amine epoxy curing agent, and it includes following raw material:Thiocarbamide 152g, diethylenetriamine 206g, anacardol 304g, 37% formalin 162g.
2nd, thiocarbamide is modified the preparation method of cashew pnenolic aldehyde amine epoxy curing agent, and it comprises the following steps:
(1) diethylenetriamine 206g and thiocarbamide 152g is added in reaction bulb, under the protection of nitrogen, Hybrid Heating is stirred Mix;50 DEG C are heated to, temperature is risen to 135 DEG C after thiocarbamide melts completely;Back flow reaction 3h, naturally cools to room temperature, produces To low viscosity, the thiocarbamide modified amine of buff;
(2) and then by anacardol 304g add in reaction bulb, Hybrid Heating stirring;Then 50 DEG C are warming up to, starts to be added dropwise 37% formalin 162g, controls the rate of addition of formaldehyde, temperature is no more than 100 DEG C;105 DEG C are then heated to continue to protect Temperature reaction 3h;
(3) after reaction terminates, weighed after vacuumizing the water in removing system, cooling, obtain thiocarbamide and be modified cashew pnenolic aldehyde amine ring Oxygen curing agent 686g.
Embodiment 4
1st, a kind of thiocarbamide is modified cashew pnenolic aldehyde amine epoxy curing agent, and it includes following raw material:Thiocarbamide 76g, diethylenetriamine 103g, anacardol 304g, paraformaldehyde 30g.
2nd, thiocarbamide is modified the preparation method of cashew pnenolic aldehyde amine epoxy curing agent, and it comprises the following steps:
(1) diethylenetriamine 103g and thiocarbamide 76g is added in reaction bulb, under the protection of nitrogen, Hybrid Heating stirring; 55 DEG C are heated to, temperature is risen to 130 DEG C after thiocarbamide melts completely;Back flow reaction 3h, naturally cools to room temperature, that is, obtains low Viscosity, the thiocarbamide modified amine of buff;
(2) and then by anacardol 304g add in reaction bulb, Hybrid Heating stirring;Then 50 DEG C are warming up to, point 3 batches add Enter paraformaldehyde 30g, control temperature is no more than 100 DEG C;Then heat to 105 DEG C and continue insulation reaction 3h;
(3) after reaction terminates, weighed after vacuumizing the water in removing system, cooling, obtain thiocarbamide and be modified cashew pnenolic aldehyde amine ring Oxygen curing agent 478g.
The performance test of embodiment 5
Gained modified by cardanol amine hardener, is pressed in Example 4《The measure of adhesive viscosity》(GB/T 2794- 1995) tested.It is 1500mPa.s to measure curing agent viscosity at 25 DEG C;HClO is used again4It is 565 that method, which determines its amine value,. By 100 part of 828 epoxy resin of mass parts, the curing agent is mixed with 25 parts, is stirred, respectively in the 5 DEG C of surveys of 25 DEG C of room temperature and low temperature Try its presetting period, the presetting period is 6min at 25 DEG C, the presetting period is 30min at 5 DEG C.With with phenol, ethylenediamine, formaldehyde is The curing agent T-31 (amine value 560) of raw material is compared, and normal temperature cure performance and low temperature curing properties will be well a lot, and T-31 is in low temperature Under not gel solidification.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (7)

1. the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide is modified, it is characterised in that it is by thiocarbamide, fatty amine, anacardol and Formaldehyde is made.
2. the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide according to claim 1 is modified, it is 1~2 by mol ratio: 1:1:1~3 waist thiocarbamide, fatty amine, anacardol and formaldehyde are made.
3. the cashew pnenolic aldehyde amine epoxy curing agent that described a kind of thiocarbamide according to claim 2 is modified, described fat Amine is ethylenediamine, diethylenetriamine, triethylene tetramine or TEPA;Described formaldehyde is the formaldehyde that volumetric concentration is 37% Solution or paraformaldehyde solid.
4. the preparation method for the cashew pnenolic aldehyde amine epoxy curing agent that the thiocarbamide described in any one of claims 1 to 3 is modified, it includes Following steps:
(1) fatty amine and thiocarbamide are added in reaction bulb, under the protection of nitrogen, then Hybrid Heating stirring is heated to 40~60 DEG C, temperature is risen to 120~135 DEG C after thiocarbamide melts completely, then 1~3h of back flow reaction naturally cools to room Temperature, obtains thiocarbamide modified amine;
(2) the thiocarbamide modified amine for preparing anacardol and step (1) is sequentially added in reaction bulb, Hybrid Heating stirring, so After be heated to 40~60 DEG C, start be added dropwise formalin;
(3) after formaldehyde completion of dropwise addition, 90~110 DEG C are heated to, continues 1~3h of insulation reaction, then vacuumizes removing body Water in system, obtains thiocarbamide and is modified cashew pnenolic aldehyde amine epoxy curing agent.
5. the preparation method for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide according to claim 4 is modified, it includes Following steps:
(1) fatty amine and thiocarbamide are added in reaction bulb, under the protection of nitrogen, then Hybrid Heating stirring is heated to 45~55 DEG C, temperature is risen to 125~135 DEG C after thiocarbamide melts completely, then back flow reaction 3h naturally cools to room temperature, obtains To thiocarbamide modified amine;
(2) the thiocarbamide modified amine for preparing anacardol and step (1) is sequentially added in reaction bulb, Hybrid Heating stirring, so After be heated to 50 DEG C, start be added dropwise formalin, control formaldehyde rate of addition, and control temperature be no more than 100 DEG C;
(3) after formaldehyde completion of dropwise addition, 95~105 DEG C are heated to, continues insulation reaction 3h, then vacuumizes in removing system Water, obtain thiocarbamide be modified cashew pnenolic aldehyde amine epoxy curing agent.
6. the preparation side for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide according to described in claim 4 or 5 is modified Method, formalin is the formalin or paraformaldehyde solution that volumetric concentration is 37%.
7. the preparation side for the cashew pnenolic aldehyde amine epoxy curing agent that a kind of thiocarbamide according to described in claim 4 or 5 is modified The mol ratio of method, described waist thiocarbamide, fatty amine, anacardol and formaldehyde is 1~2:1:1:1~3.
CN201710357554.0A 2017-05-19 2017-05-19 Cashew pnenolic aldehyde amine epoxy curing agent and preparation method that a kind of thiocarbamide is modified Pending CN107011503A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110615881A (en) * 2019-08-20 2019-12-27 浙江万盛股份有限公司 Preparation method of water-based epoxy curing agent
CN113105721A (en) * 2021-04-14 2021-07-13 中国人民解放军陆军工程大学 Rapid hardening and solidifying material for soft sand texture, preparation method and application
CN113480727A (en) * 2021-06-08 2021-10-08 华南理工大学 Preparation method of modified polyether amine epoxy resin curing agent
CN113651764A (en) * 2021-08-20 2021-11-16 浙江工业大学 Synthesis method and application of heavy metal stabilizer
CN113717339A (en) * 2021-09-16 2021-11-30 上海交通大学 Curing agent for reducing volatile matters of adhesive
CN114031750A (en) * 2021-11-24 2022-02-11 山东天茂新材料科技股份有限公司 Low-temperature thin-coating type phenolic aldehyde amine curing agent and preparation method thereof
CN118291071A (en) * 2024-04-17 2024-07-05 佛山禾邦新材料科技有限公司 Epoxy heat-conducting structural adhesive capable of realizing rapid positioning and curing at room temperature and preparation method thereof

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CN102206064A (en) * 2010-09-01 2011-10-05 重庆市新安洁环境绿化工程(集团)有限公司 Cold-patch bituminous mixture and preparation method thereof
CN103980463A (en) * 2014-04-23 2014-08-13 中科院广州化学有限公司南雄材料生产基地 Epoxy resin solvent-free low temperature curing agent, preparation method and application thereof
CN104098751A (en) * 2013-04-03 2014-10-15 谢再锋 Environment-friendly cardanol, urea synergistically modified phenolic resin and application thereof to high temperature resistant friction material

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102206064A (en) * 2010-09-01 2011-10-05 重庆市新安洁环境绿化工程(集团)有限公司 Cold-patch bituminous mixture and preparation method thereof
CN104098751A (en) * 2013-04-03 2014-10-15 谢再锋 Environment-friendly cardanol, urea synergistically modified phenolic resin and application thereof to high temperature resistant friction material
CN103980463A (en) * 2014-04-23 2014-08-13 中科院广州化学有限公司南雄材料生产基地 Epoxy resin solvent-free low temperature curing agent, preparation method and application thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110615881A (en) * 2019-08-20 2019-12-27 浙江万盛股份有限公司 Preparation method of water-based epoxy curing agent
CN113105721A (en) * 2021-04-14 2021-07-13 中国人民解放军陆军工程大学 Rapid hardening and solidifying material for soft sand texture, preparation method and application
CN113105721B (en) * 2021-04-14 2023-12-29 中国人民解放军陆军工程大学 Rapid hardening consolidation material for soft sandy texture, preparation method and application
CN113480727A (en) * 2021-06-08 2021-10-08 华南理工大学 Preparation method of modified polyether amine epoxy resin curing agent
CN113651764A (en) * 2021-08-20 2021-11-16 浙江工业大学 Synthesis method and application of heavy metal stabilizer
CN113717339A (en) * 2021-09-16 2021-11-30 上海交通大学 Curing agent for reducing volatile matters of adhesive
CN114031750A (en) * 2021-11-24 2022-02-11 山东天茂新材料科技股份有限公司 Low-temperature thin-coating type phenolic aldehyde amine curing agent and preparation method thereof
CN118291071A (en) * 2024-04-17 2024-07-05 佛山禾邦新材料科技有限公司 Epoxy heat-conducting structural adhesive capable of realizing rapid positioning and curing at room temperature and preparation method thereof

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Application publication date: 20170804