CN109181137A - A kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof - Google Patents
A kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof Download PDFInfo
- Publication number
- CN109181137A CN109181137A CN201810644501.1A CN201810644501A CN109181137A CN 109181137 A CN109181137 A CN 109181137A CN 201810644501 A CN201810644501 A CN 201810644501A CN 109181137 A CN109181137 A CN 109181137A
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- China
- Prior art keywords
- mass parts
- solid wall
- wall pipe
- flame retardant
- environmental protection
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The present invention relates to a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows: 100 mass parts of polyvinyl chloride, polyethylene-acrylate rubber 12-28 mass parts, urea 5-18 mass parts, polypropylene carbonate 9-15 mass parts, aromatic copolycarbonate 5-12 mass parts, calcium stearate 1-5 mass parts, polyamide 1-5 mass parts, modifier 1-2 mass parts, impact modifying agent 3-9 mass parts, lubricant 0.1-0.8 mass parts and ultraviolet absorbing agent 1-3 mass parts.PVC solid wall pipe urea provided by the invention and polypropylene carbonate.Wherein urea has the function of very strong moisture absorption and moisturizing, to add somewhat to the humidity of PVC solid wall pipe surrounding enviroment, reduces temperature, improves the anti-flammability of PVC solid wall pipe；And polypropylene carbonate can be generated great amount of carbon dioxide by thermal decomposition under burning condition and be achieved the purpose that fire-retardant to dilute the oxygen concentration in PVC solid wall pipe surrounding enviroment.And be both halogen-free and phosphorus, solve the problems, such as pollution environment.
Description
Technical field
The present invention relates to pvc pipe fields more particularly to a kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof.
Background technique
PVC(Polyvinylchlorid) pipe is a kind of tubing as the main component with polyvinyl chloride.PVC pipe exists at present
There is extremely wide purposes in the fields such as water supply and sewage, electric power cable laying.But polyvinyl chloride temperature tolerance is poor, is easier to fire
It burns, to affect the safety in utilization of PVC solid wall pipe.Usual way is that fire retardant is added in pvc material.Mesh
Preceding common fire retardant usually contains halogen or phosphorus.Flame retardant effect containing halogen or phosphorus is obvious but also compares environmental hazard
Larger, such as halogen fire proofing generates dioxin in burning, can exist for many years in the environment, or even accumulate on biology all the life
Body；Phosphorus will lead to the eutrophication of water quality, serious polluted source.Therefore it is environmentally friendly to provide one kind, has good fire-retardant
The PVC solid wall pipe of effect is problem to be solved by this invention.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, provide it is a kind of environmentally friendly, with good flame retardant effect
PVC solid wall pipe.
In order to achieve the above objectives, the technical solution adopted by the present invention are as follows: a kind of environmental protection flame retardant PVC solid wall pipe is provided,
Be characterized in that: it is formed and content are as follows: 100 mass parts of polyvinyl chloride, polyethylene-acrylate rubber 12-28 mass parts, urea
5-18 mass parts, polypropylene carbonate 9-15 mass parts, aromatic copolycarbonate 5-12 mass parts, calcium stearate 1-5 mass parts,
Polyamide 1-5 mass parts, modifier 1-2 mass parts, impact modifying agent 3-9 mass parts, lubricant 0.1-0.8 mass parts with
And ultraviolet absorbing agent 1-3 mass parts.
As a preferred embodiment, the impact modifying agent is acrylonitrile-butadiene-phenylethylene terpolymer or chlorination
Polyethylene.
As a kind of more preferable scheme, the ultraviolet absorbing agent is septichen phenyl ester, 2-(2 ˊ--5 ˊ of hydroxyl -
Aminomethyl phenyl) benzotriazole or 2,4-DihydroxyBenzophenone one kind.
As a kind of more preferable scheme, the aromatic copolycarbonate is bisphenol A polycarbonate；The modifier
For polyacrylate modifier；The lubricant is paraffin.
The present invention also provides the preparation methods of above-mentioned environmental protection flame retardant PVC solid wall pipe, which is characterized in that including following step
It is rapid:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material；
(2) by mixed raw material heat drying, drying temperature is 105-135 DEG C；
(3) mixed raw material is by melting extrusion equipment after drying, and melting extrusion equipment has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 195-205 DEG C, at 180-190 DEG C, exhaust section temperature is controlled at 185-195 DEG C for compression section temperature control,
Homogenizing zone temperature is controlled at 170-180 DEG C；Final mixed raw material squeezes out to obtain high temperature pvc pipe blank；
(4) high temperature pvc pipe blank is shifted using dragger, it is made to cool down by water cooling equipment；
(5) it is formed, cutting obtains pvc pipe finished product.
As a preferred embodiment, melting extrusion equipment is double screw extruder in the step (3).
As a kind of more preferable scheme, screw speed control is in 25-45r/min in the step (3).
As a kind of more preferable scheme, extrusion temperature control is at 195-210 DEG C in the step (3).
As a kind of more preferable scheme, the control of double screw extruder head pressure is in 20-45MPa in the step (3).
As a preferred embodiment, water cooling equipment cooling water temperature is controlled at 20-60 DEG C in the step (4).
The beneficial technical effect of the present invention lies in: provide a kind of environmentally friendly, the PVC with good flame retardant effect
Solid wall pipe.PVC solid wall pipe urea provided by the invention and polypropylene carbonate.Wherein urea has very strong moisture absorption and moisturizing
Effect, to add somewhat to the humidity of PVC solid wall pipe surrounding enviroment, reduces temperature, improves PVC solid wall pipe
Anti-flammability；And polypropylene carbonate can be generated great amount of carbon dioxide under burning condition by thermal decomposition, to dilute PVC solid wall
Oxygen concentration in pipe surrounding enviroment achievees the purpose that fire-retardant.And be both halogen-free and phosphorus, solve asking for pollution environment
Topic.
Specific embodiment
The invention will be further described combined with specific embodiments below.Following embodiment is only used for clearly illustrating
Technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1
The present invention provides a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows:
100 mass parts of polyvinyl chloride, 12 mass parts of polyethylene-acrylate rubber, 5 mass parts of urea, polypropylene carbonate 15
Mass parts, 5 mass parts of bisphenol A polycarbonate, 1 mass parts of calcium stearate, 5 mass parts of polyamide, polyacrylate processing
1 mass parts of modifying agent, 9 mass parts of acrylonitrile-butadiene-phenylethylene terpolymer, 0.1 mass parts of paraffin and 2-(2 ˊ-hydroxyl
- 5 ˊ of base-aminomethyl phenyl) 1 mass parts of benzotriazole.
Environmental protection flame retardant PVC solid wall pipe is prepared as follows:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material.
(2) by mixed raw material heat drying, drying temperature is 105 DEG C.
(3) material passes through double screw extruder after drying.Double screw extruder has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 195 DEG C, and compression section temperature control is at 180 DEG C, and the control of exhaust section temperature is at 185 DEG C, homogenizing zone temperature control
System is at 170 DEG C.Final material obtains high temperature pvc pipe blank by head extrusion, and extrusion temperature control is at 195 DEG C, twin-screw extrusion
Machine head pressure is controlled in 20MPa.Whole process screw speed control simultaneously is in 25r/min.
(4) high temperature pvc pipe blank is shifted using dragger, so that it is cooled down by water cooling equipment, cooling water temperature control
System is at 20 DEG C.
(5) it is formed, cutting obtains pvc pipe finished product.
Using the method for co-extrusion being added to prepare flame-proof PVC solid wall pipe in fire retardant matter, keeping conjugation between material more preferable, imitating
Fruit plays more preferable also more longlasting.
Embodiment 2
The present invention provides a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows:
100 mass parts of polyvinyl chloride, 16 mass parts of polyethylene-acrylate rubber, 8 mass parts of urea, polypropylene carbonate 14
Mass parts, 6 mass parts of bisphenol A polycarbonate, 2 mass parts of calcium stearate, 4 mass parts of polyamide, polyacrylate processing
1 mass parts of modifying agent, 1 mass parts of 9 mass parts of haloflex, 0.3 mass parts of paraffin and 2,4-DihydroxyBenzophenone.
Environmental protection flame retardant PVC solid wall pipe is prepared as follows:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material.
(2) by mixed raw material heat drying, drying temperature is 115 DEG C.
(3) material passes through double screw extruder after drying.Double screw extruder has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 195 DEG C, and compression section temperature control is at 185 DEG C, and the control of exhaust section temperature is at 190 DEG C, homogenizing zone temperature control
System is at 175 DEG C.Final material obtains high temperature pvc pipe blank by head extrusion, and extrusion temperature control is at 200 DEG C, twin-screw extrusion
Machine head pressure is controlled in 25MPa.Whole process screw speed control simultaneously is in 30r/min.
(4) high temperature pvc pipe blank is shifted using dragger, so that it is cooled down by water cooling equipment, cooling water temperature control
System is at 30 DEG C.
(5) it is formed, cutting obtains pvc pipe finished product.
Embodiment 3
The present invention provides a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows:
100 mass parts of polyvinyl chloride, 20 mass parts of polyethylene-acrylate rubber, 12 mass parts of urea, polypropylene carbonate 12
Mass parts, 8 mass parts of bisphenol A polycarbonate, 3 mass parts of calcium stearate, kymene mass parts, polyacrylate processing
1.5 mass parts of modifying agent, 7 mass parts of acrylonitrile-butadiene-phenylethylene terpolymer, 0.5 mass parts of paraffin and adjacent hydroxyl
2 mass parts of phenol benzoate.
Environmental protection flame retardant PVC solid wall pipe is prepared as follows:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material.
(2) by mixed raw material heat drying, drying temperature is 120 DEG C.
(3) material passes through double screw extruder after drying.Double screw extruder has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 200 DEG C, and compression section temperature control is at 185 DEG C, and the control of exhaust section temperature is at 190 DEG C, homogenizing zone temperature control
System is at 180 DEG C.Final material obtains high temperature pvc pipe blank by head extrusion, and extrusion temperature control is at 200 DEG C, twin-screw extrusion
Machine head pressure is controlled in 30MPa.Whole process screw speed control simultaneously is in 30r/min.
(4) high temperature pvc pipe blank is shifted using dragger, so that it is cooled down by water cooling equipment, cooling water temperature control
System is at 40 DEG C.
(5) it is formed, cutting obtains pvc pipe finished product.
Embodiment 4
The present invention provides a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows:
100 mass parts of polyvinyl chloride, 24 mass parts of polyethylene-acrylate rubber, 15 mass parts of urea, polypropylene carbonate 10
Mass parts, 9 mass parts of bisphenol A polycarbonate, 4 mass parts of calcium stearate, 2 mass parts of polyamide, polyacrylate processing
2 mass parts of modifying agent, 5 mass parts of haloflex, 0.6 mass parts of paraffin and 2-(2 ˊ--5 ˊ of hydroxyl-aminomethyl phenyl) benzo
2 mass parts of triazole.
Environmental protection flame retardant PVC solid wall pipe is prepared as follows:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material.
(2) by mixed raw material heat drying, drying temperature is 125 DEG C.
(3) material passes through double screw extruder after drying.Double screw extruder has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 205 DEG C, and compression section temperature control is at 190 DEG C, and the control of exhaust section temperature is at 195 DEG C, homogenizing zone temperature control
System is at 180 DEG C.Final material obtains high temperature pvc pipe blank by head extrusion, and extrusion temperature control is at 210 DEG C, twin-screw extrusion
Machine head pressure is controlled in 40MPa.Whole process screw speed control simultaneously is in 40r/min.
(4) high temperature pvc pipe blank is shifted using dragger, so that it is cooled down by water cooling equipment, cooling water temperature control
System is at 50 DEG C.
(5) it is formed, cutting obtains pvc pipe finished product.
Embodiment 5
The present invention provides a kind of environmental protection flame retardant PVC solid wall pipe, composition and content are as follows:
100 mass parts of polyvinyl chloride, 28 mass parts of polyethylene-acrylate rubber, 18 mass parts of urea, polypropylene carbonate 9
Mass parts, 12 mass parts of bisphenol A polycarbonate, 5 mass parts of calcium stearate, 1 mass parts of polyamide, polyacrylate processing
2 mass parts of modifying agent, 3 mass parts of acrylonitrile-butadiene-phenylethylene terpolymer, 0.8 mass parts of paraffin and 2,4- dihydroxy
3 mass parts of base benzophenone.
Environmental protection flame retardant PVC solid wall pipe is prepared as follows:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material.
(2) by mixed raw material heat drying, drying temperature is 135 DEG C.
(3) material passes through double screw extruder after drying.Double screw extruder has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 205 DEG C, and compression section temperature control is at 190 DEG C, and the control of exhaust section temperature is at 195 DEG C, homogenizing zone temperature control
System is at 180 DEG C.Final material obtains high temperature pvc pipe blank by head extrusion, and extrusion temperature control is at 210 DEG C, twin-screw extrusion
Machine head pressure is controlled in 45MPa.Whole process screw speed control simultaneously is in 45r/min.
(4) high temperature pvc pipe blank is shifted using dragger, so that it is cooled down by water cooling equipment, cooling water temperature control
System is at 60 DEG C.
(5) it is formed, cutting obtains pvc pipe finished product.
Based on the above description of the preferred embodiments of the present invention, through the above description, related personnel completely can be with
Without departing from the scope of the technological thought of the present invention', various changes and amendments are carried out.The technical scope of this invention
It is not limited to the contents of the specification, it is necessary to determine the technical scope according to the scope of the claims.
Claims (10)
1. a kind of environmental protection flame retardant PVC solid wall pipe, it is characterised in that: it is formed and content are as follows: 100 mass parts of polyvinyl chloride, poly- second
Alkene-acrylic rubber 12-28 mass parts, urea 5-18 mass parts, polypropylene carbonate 9-15 mass parts, aromatic polycarbonate
Ester 5-12 mass parts, calcium stearate 1-5 mass parts, polyamide 1-5 mass parts, modifier 1-2 mass parts, impact modifying agent
3-9 mass parts, lubricant 0.1-0.8 mass parts and ultraviolet absorbing agent 1-3 mass parts.
2. environmental protection flame retardant PVC solid wall pipe according to claim 1, it is characterised in that: the impact modifying agent is acrylonitrile-
Butadiene-styrene terpolymer or haloflex.
3. environmental protection flame retardant PVC solid wall pipe according to claim 2, it is characterised in that: the ultraviolet absorbing agent is adjacent hydroxyl
Yl benzoic acid phenyl ester, 2-(2 ˊ--5 ˊ of hydroxyl-aminomethyl phenyl) benzotriazole or 2,4-DihydroxyBenzophenone one kind.
4. environmental protection flame retardant PVC solid wall pipe according to claim 3, it is characterised in that: the aromatic copolycarbonate is double
Phenol A type polycarbonate；The modifier is polyacrylate modifier；The lubricant is paraffin.
5. the preparation method of the environmental protection flame retardant PVC solid wall pipe as described in claim 1-4 is any, which is characterized in that including following
Step:
(1) polyvinyl chloride, polyethylene-acrylate rubber, urea, polypropylene carbonate, aromatic copolycarbonate, tristearin are weighed
Sour calcium, polyamide, modifier, impact modifying agent, lubricant and ultraviolet absorbing agent are placed in container and are uniformly mixed,
Obtain mixed raw material；
(2) by mixed raw material heat drying, drying temperature is 105-135 DEG C；
(3) mixed raw material is by melting extrusion equipment after drying, and melting extrusion equipment has screw rod, and is divided into four sections, wherein giving
The control of section temperature is expected at 195-205 DEG C, at 180-190 DEG C, exhaust section temperature is controlled at 185-195 DEG C for compression section temperature control,
Homogenizing zone temperature is controlled at 170-180 DEG C；Final mixed raw material squeezes out to obtain high temperature pvc pipe blank；
(4) high temperature pvc pipe blank is shifted using dragger, it is made to cool down by water cooling equipment；
(5) it is formed, cutting obtains pvc pipe finished product.
6. the preparation method of environmental protection flame retardant PVC solid wall pipe according to claim 5, it is characterised in that: in the step (3)
Melting extrusion equipment is double screw extruder.
7. the preparation method of environmental protection flame retardant PVC solid wall pipe according to claim 6, it is characterised in that: in the step (3)
Screw speed is controlled in 25-45r/min.
8. the preparation method of environmental protection flame retardant PVC solid wall pipe according to claim 6, it is characterised in that: in the step (3)
Extrusion temperature is controlled at 195-210 DEG C.
9. the preparation method of environmental protection flame retardant PVC solid wall pipe according to claim 6, it is characterised in that: in the step (3)
Double screw extruder head pressure is controlled in 20-45MPa.
10. the preparation method of environmental protection flame retardant PVC solid wall pipe according to claim 5, it is characterised in that: the step (4)
Middle water cooling equipment cooling water temperature control is at 20-60 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644501.1A CN109181137A (en) | 2018-06-21 | 2018-06-21 | A kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644501.1A CN109181137A (en) | 2018-06-21 | 2018-06-21 | A kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109181137A true CN109181137A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810644501.1A Pending CN109181137A (en) | 2018-06-21 | 2018-06-21 | A kind of environmental protection flame retardant PVC solid wall pipe and preparation method thereof |
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| Country | Link |
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| CN (1) | CN109181137A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086234A (en) * | 2015-08-03 | 2015-11-25 | 广东联塑科技实业有限公司 | Polyvinyl chloride single-wall corrugated pipe used for buildings and preparation method of polyvinyl chloride single-wall corrugated pipe |
| CN105440486A (en) * | 2015-12-10 | 2016-03-30 | 安徽宁国市高新管业有限公司 | PVC tube with excellent impact strength |
| CN107325442A (en) * | 2017-07-13 | 2017-11-07 | 安徽梅兰园林景观工程有限公司 | A kind of water pipe being used in pipeline engineering and preparation method thereof |
-
2018
- 2018-06-21 CN CN201810644501.1A patent/CN109181137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086234A (en) * | 2015-08-03 | 2015-11-25 | 广东联塑科技实业有限公司 | Polyvinyl chloride single-wall corrugated pipe used for buildings and preparation method of polyvinyl chloride single-wall corrugated pipe |
| CN105440486A (en) * | 2015-12-10 | 2016-03-30 | 安徽宁国市高新管业有限公司 | PVC tube with excellent impact strength |
| CN107325442A (en) * | 2017-07-13 | 2017-11-07 | 安徽梅兰园林景观工程有限公司 | A kind of water pipe being used in pipeline engineering and preparation method thereof |
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Application publication date: 20190111 |