CN104861626A - High strength flame retardant aging resistant polycarbonate plastic wood composite material - Google Patents
High strength flame retardant aging resistant polycarbonate plastic wood composite material Download PDFInfo
- Publication number
- CN104861626A CN104861626A CN201410812596.5A CN201410812596A CN104861626A CN 104861626 A CN104861626 A CN 104861626A CN 201410812596 A CN201410812596 A CN 201410812596A CN 104861626 A CN104861626 A CN 104861626A
- Authority
- CN
- China
- Prior art keywords
- polycarbonate
- ageing
- resistant
- wood
- carbon fiber
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a high strength flame retardant aging resistant polycarbonate plastic wood composite material which comprises the following components by mass: 20%-30% of polycarbonate, 15%-30% of wood powder, 6%-9% of carbon fiber, 5%-12% of wollastonite, 5%-7% of melamine cyanurate, 5%-12% of nano aluminum hydroxide, 6%-8% of ACR, 5%-8% of a plasticizer, 2%-4% of maleic anhydride grafted polyethylene, 1%-2% of alkyl sodium sulfonate, 1%-2% of a colorant, 0.5%-2% of light stabilizer 944, 0.1%-0.5% of antioxidant1010 and 0.1%-1% of calcium stearate. The beneficial effect is that the high strength flame retardant aging resistant polycarbonate plastic wood composite material has the advantages of high strength, good plasticity, low cost, strong corrosion resistance, good flame resistance, high heat resistance, good anti ageing property, and the like, and is easy to process, non-toxic, environmentally friendly, and easy to popularize.
Description
Technical field
The present invention relates to wood producing technical field, the polycarbonate Wood plastic composite that specifically a kind of high-strength fire-retarding is ageing-resistant.
Background technology
Timber owing to having beautiful texture, color and luster is natural, texture is comfortable, plasticity-is good, be easy to the advantages such as processing, be widely applied in fields such as construction and decoration, Furniture manufacture, packagings at present.But because the forest reserves are limited, seek and develop a kind of alternative timber and the type material widely applied will quite show important and urgent.Polycarbonate is a kind of thermoplastic engineering plastic of excellent combination property, it has outstanding shock resistance, resistance to creep and good stability of the dimension, and higher mechanical strength can be kept in higher temperature range, nontoxic, dielectric properties are excellent, are the engineering plastics that rapid development is the fastest and the size of capacity is maximum in recent years, have been widely used in the fields such as automotive industry, material of construction, mechanical component, electronic apparatus, sports equipment, household supplies, packaging at present.Therefore, researching and developing a kind of is that the Wood plastic composite of raw material substitutes wood raw material with polycarbonate, not only can alleviate current timber problem in short supply well, and its good processability, cost is low, strong to environmental resistance, wide accommodation, stable performance, easy to utilize.
Summary of the invention
The object of the present invention is to provide the polycarbonate Wood plastic composite that the high-strength fire-retarding of a kind of excellent combination property and good environmental protection is ageing-resistant.
The technical solution adopted for the present invention to solve the technical problems is: the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding is ageing-resistant, its component by mass percent proportioning is: polycarbonate 20% ~ 30%, wood powder 15% ~ 30%, carbon fiber 6% ~ 9%, wollastonite 5% ~ 12%, melamine cyanurate 5% ~ 7%, nano-aluminum hydroxide 5% ~ 12%, ACR 6% ~ 8%, softening agent 5% ~ 8%, maleic anhydride grafted polyethylene 2% ~ 4%, alkyl sodium sulfonate 1% ~ 2%, tinting material 1% ~ 2%, photostabilizer 944 0.5% ~ 2%, antioxidant 1010 0.1% ~ 0.5%, calcium stearate 0.1% ~ 1%.
Described polycarbonate is the bisphenol A-type aromatic copolycarbonate of weight-average molecular weight at 20000 ~ 40000g/mol.
Described wood powder is with the tailing of wood working, waste and old wood-based product recovery article, agricultural crop straw for raw material, processes through clean and be ground into the wooden fine powder of 100 ~ 300 object.
Described carbon fiber be surface through the modified oxidized process of perchloric acid solution and diameter 3 ~ 30 μm, length is at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope.
Described wollastonite be surface through silane coupler modified process and diameter at 3 ~ 30 μm, the fibrous wollastonite of length within the scope of 10 ~ 500 μm.
Described nano-aluminum hydroxide be surface through silane coupler modified process and particle diameter at the aluminum hydroxyl nano particle of 10 ~ 100nm.
Described ACR is Methylacrylate-Acrylate Copolymer.
Described softening agent is the dibutyl phthalate of mass ratio 1 ~ 3:1 and the compound of polyoxyethylene glycol.
Described tinting material take linear low density polyethylene as one in the white master batch of carrier, black agglomerate, red master batch, blue master batch, yellow masterbatch, grey Masterbatch.
The preparation method of the polycarbonate Wood plastic composite that above-mentioned a kind of high-strength fire-retarding is ageing-resistant, comprises the following steps:
(1), with the tailing of wood working, waste and old wood-based product recovery article, agricultural crop straw for raw material, through sorting, clean with after removing impurity, be processed into 100 ~ 300 object fine powders by pulverizer, be then dried to water content 8% ~ 12%, obtain described wood powder;
(2), by diameter 3 ~ 30 μm, to add mass concentration at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope be in the perchloric acid solution of 98% to length, supersound process 30 ~ 120min at 60 DEG C ~ 90 DEG C temperature, then extremely neutral with deionized water rinsing, again by vacuum drying oven dry 24 ~ 48h at 80 DEG C ~ 150 DEG C temperature, obtain the carbon fiber of described modified oxidized process;
(3) take each component, by weight ratio, comprise dry wood powder that step (1) obtains and the modified carbon fiber that step (2) obtains, then add in agitator, at 70 DEG C ~ 95 DEG C temperature, stir 20 ~ 50min, to be mixed evenly after, discharging;
(4), the material that step (3) obtains is added twin screw extruder melting be squeezed into casting in forming mould, obtain the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding of the present invention is ageing-resistant.
The invention has the beneficial effects as follows, the present invention has the advantages such as intensity is high, plasticity-good, cost is low, erosion resistance is strong, and good flame resistance, heat-resistant stability is high, and anti ageing property is excellent, is easy to processing, alternative timber is suitable for the fields such as construction and decoration, Furniture manufacture, decoration, and nontoxic, environmental protection, its effect is good, is convenient to promote.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with concrete preferred embodiment.
Embodiment 1:
The polycarbonate Wood plastic composite that high-strength fire-retarding is ageing-resistant, its component by mass percent proportioning is: polycarbonate 20%, wood powder 15%, carbon fiber 9%, wollastonite 12%, melamine cyanurate 7%, nano-aluminum hydroxide 12%, ACR 8%, softening agent 8%, maleic anhydride grafted polyethylene 3%, alkyl sodium sulfonate 2%, tinting material 2%, photostabilizer 944 1%, antioxidant 1010 0.5%, calcium stearate 0.5%, described polycarbonate is the bisphenol A-type aromatic copolycarbonate of weight-average molecular weight at 20000 ~ 40000g/mol, and described wood powder is the tailing with wood working, waste and old wood-based product recovery article, agricultural crop straw is raw material, through clean processing, and being ground into the wooden fine powder of 100 ~ 300 object, described carbon fiber is that surface is through the modified oxidized process of perchloric acid solution, and diameter is at 3 ~ 30 μm, length is at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope, and described wollastonite is that surface is through silane coupler modified process, and diameter is at 3 ~ 30 μm, the fibrous wollastonite of length within the scope of 10 ~ 500 μm, described nano-aluminum hydroxide is that surface is through silane coupler modified process, and particle diameter is at the aluminum hydroxyl nano particle of 10 ~ 100nm, described softening agent is the dibutyl phthalate of mass ratio 1:1 and the compound of polyoxyethylene glycol, and described tinting material take linear low density polyethylene as the black agglomerate of carrier.
Preparation method: (1), with the tailing of wood working, waste and old wood-based product recovery article, agricultural crop straw for raw material, through sorting, clean with after removing impurity, 100 ~ 300 object fine powders are processed into by pulverizer, then be dried to water content 8% ~ 12%, obtain described wood powder; (2), by diameter 3 ~ 30 μm, to add mass concentration at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope be in the perchloric acid solution of 98% to length, supersound process 30 ~ 120min at 60 DEG C ~ 90 DEG C temperature, then extremely neutral with deionized water rinsing, again by vacuum drying oven dry 24 ~ 48h at 80 DEG C ~ 150 DEG C temperature, obtain the carbon fiber of described modified oxidized process; (3) take each component, by weight ratio, comprise dry wood powder that step (1) obtains and the modified carbon fiber that step (2) obtains, then add in agitator, at 70 DEG C ~ 95 DEG C temperature, stir 20 ~ 50min, to be mixed evenly after, discharging; (4), the material that step (3) obtains is added twin screw extruder melting be squeezed into casting in forming mould, obtain the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding of the present invention is ageing-resistant.
Embodiment 2:
The polycarbonate Wood plastic composite that high-strength fire-retarding is ageing-resistant, its component by mass percent proportioning is: polycarbonate 30%, wood powder 30%, carbon fiber 6%, wollastonite 5%, melamine cyanurate 5%, nano-aluminum hydroxide 5%, ACR 6%, softening agent 5%, maleic anhydride grafted polyethylene 2%, alkyl sodium sulfonate 1%, tinting material 2%, photostabilizer 944 1.5%, antioxidant 1010 0.5%, calcium stearate 1%, described polycarbonate is the bisphenol A-type aromatic copolycarbonate of weight-average molecular weight at 20000 ~ 40000g/mol, and described wood powder is the tailing with wood working, waste and old wood-based product recovery article, agricultural crop straw is raw material, through clean processing, and being ground into the wooden fine powder of 100 ~ 300 object, described carbon fiber is that surface is through the modified oxidized process of perchloric acid solution, and diameter is at 3 ~ 30 μm, length is at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope, and described wollastonite is that surface is through silane coupler modified process, and diameter is at 3 ~ 30 μm, the fibrous wollastonite of length within the scope of 10 ~ 500 μm, described nano-aluminum hydroxide is that surface is through silane coupler modified process, and particle diameter is at the aluminum hydroxyl nano particle of 10 ~ 100nm, described softening agent is the dibutyl phthalate of mass ratio 3:1 and the compound of polyoxyethylene glycol, and described tinting material take linear low density polyethylene as the grey Masterbatch of carrier.
Preparation method: (1), with the tailing of wood working, waste and old wood-based product recovery article, agricultural crop straw for raw material, through sorting, clean with after removing impurity, 100 ~ 300 object fine powders are processed into by pulverizer, then be dried to water content 8% ~ 12%, obtain described wood powder; (2), by diameter 3 ~ 30 μm, to add mass concentration at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope be in the perchloric acid solution of 98% to length, supersound process 30 ~ 120min at 60 DEG C ~ 90 DEG C temperature, then extremely neutral with deionized water rinsing, again by vacuum drying oven dry 24 ~ 48h at 80 DEG C ~ 150 DEG C temperature, obtain the carbon fiber of described modified oxidized process; (3) take each component, by weight ratio, comprise dry wood powder that step (1) obtains and the modified carbon fiber that step (2) obtains, then add in agitator, at 70 DEG C ~ 95 DEG C temperature, stir 20 ~ 50min, to be mixed evenly after, discharging; (4), the material that step (3) obtains is added twin screw extruder melting be squeezed into casting in forming mould, obtain the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding of the present invention is ageing-resistant.
Claims (7)
1. the polycarbonate Wood plastic composite that a high-strength fire-retarding is ageing-resistant, it is characterized in that, its component by mass percent proportioning is: polycarbonate 20% ~ 30%, wood powder 15% ~ 30%, carbon fiber 6% ~ 9%, wollastonite 5% ~ 12%, melamine cyanurate 5% ~ 7%, nano-aluminum hydroxide 5% ~ 12%, ACR 6% ~ 8%, softening agent 5% ~ 8%, maleic anhydride grafted polyethylene 2% ~ 4%, alkyl sodium sulfonate 1% ~ 2%, tinting material 1% ~ 2%, photostabilizer 944 0.5% ~ 2%, antioxidant 1010 0.1% ~ 0.5%, calcium stearate 0.1% ~ 1%.
2. the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, it is characterized in that, described carbon fiber be surface through the modified oxidized process of perchloric acid solution and diameter 3 ~ 30 μm, length is at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope.
3. the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, it is characterized in that, described wollastonite be surface through silane coupler modified process and diameter at 3 ~ 30 μm, the fibrous wollastonite of length within the scope of 10 ~ 500 μm.
4. the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, is characterized in that, described nano-aluminum hydroxide be surface through silane coupler modified process and particle diameter at the aluminum hydroxyl nano particle of 10 ~ 100nm.
5. the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, is characterized in that, described softening agent is the dibutyl phthalate of mass ratio 1 ~ 3:1 and the compound of polyoxyethylene glycol.
6. the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, it is characterized in that, described tinting material take linear low density polyethylene as one in the white master batch of carrier, black agglomerate, red master batch, blue master batch, yellow masterbatch, grey Masterbatch.
7. the preparation method of the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding according to claim 1 is ageing-resistant, is characterized in that, comprise the following steps:
(1), with the tailing of wood working, waste and old wood-based product recovery article, agricultural crop straw for raw material, through sorting, clean with after removing impurity, be processed into 100 ~ 300 object fine powders by pulverizer, be then dried to water content 8% ~ 12%, obtain described wood powder;
(2), by diameter 3 ~ 30 μm, to add mass concentration at the polyacrylonitrile carbon fiber of 10 ~ 75cm scope be in the perchloric acid solution of 98% to length, supersound process 30 ~ 120min at 60 DEG C ~ 90 DEG C temperature, then extremely neutral with deionized water rinsing, again by vacuum drying oven dry 24 ~ 48h at 80 DEG C ~ 150 DEG C temperature, obtain the carbon fiber of described modified oxidized process;
(3) take each component, by weight ratio, comprise dry wood powder that step (1) obtains and the modified carbon fiber that step (2) obtains, then add in agitator, at 70 DEG C ~ 95 DEG C temperature, stir 20 ~ 50min, to be mixed evenly after, discharging;
(4), the material that step (3) obtains is added twin screw extruder melting be squeezed into casting in forming mould, obtain the polycarbonate Wood plastic composite that a kind of high-strength fire-retarding of the present invention is ageing-resistant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812596.5A CN104861626A (en) | 2014-12-24 | 2014-12-24 | High strength flame retardant aging resistant polycarbonate plastic wood composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812596.5A CN104861626A (en) | 2014-12-24 | 2014-12-24 | High strength flame retardant aging resistant polycarbonate plastic wood composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104861626A true CN104861626A (en) | 2015-08-26 |
Family
ID=53907835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410812596.5A Pending CN104861626A (en) | 2014-12-24 | 2014-12-24 | High strength flame retardant aging resistant polycarbonate plastic wood composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104861626A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105602224A (en) * | 2016-03-03 | 2016-05-25 | 宜宾市富通塑胶有限责任公司 | Shoot langrage cartridge clip based on polycarbonate and production method |
| CN106188920A (en) * | 2016-07-21 | 2016-12-07 | 芜湖昊轩环保新材料有限公司 | A kind of scratch-resistant aging resistance wood plastic composite board and preparation method thereof |
| CN106633751A (en) * | 2016-09-21 | 2017-05-10 | 苏州佰思科节能环保科技有限公司 | Water-resistant and abrasion-resistant wood-plastic composite material and method for preparing same |
-
2014
- 2014-12-24 CN CN201410812596.5A patent/CN104861626A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105602224A (en) * | 2016-03-03 | 2016-05-25 | 宜宾市富通塑胶有限责任公司 | Shoot langrage cartridge clip based on polycarbonate and production method |
| CN106188920A (en) * | 2016-07-21 | 2016-12-07 | 芜湖昊轩环保新材料有限公司 | A kind of scratch-resistant aging resistance wood plastic composite board and preparation method thereof |
| CN106633751A (en) * | 2016-09-21 | 2017-05-10 | 苏州佰思科节能环保科技有限公司 | Water-resistant and abrasion-resistant wood-plastic composite material and method for preparing same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103992590B (en) | A kind of waste or used plastics resource regeneration produces formula of Wood-plastic material and preparation method thereof | |
| CN103709659A (en) | Glass fiber reinforced PBT/PET alloy material | |
| CN101659779A (en) | Halogen-free flame-retardant ABS resin and preparation method thereof | |
| CN104861326A (en) | Nano silicon dioxide-containing polyvinyl chloride plastic wood composite material | |
| CN104861352A (en) | Impact modified polyvinyl chloride cable material | |
| CN104592722A (en) | High-luster low-warpage glass fiber reinforced PBT/PP (Polybutylene Terephthalate/Polypropylene) alloy and preparation method thereof | |
| CN104262784B (en) | Halogen-free flame retardant composite fiber-enhanced PP material and preparation method thereof | |
| CN104861626A (en) | High strength flame retardant aging resistant polycarbonate plastic wood composite material | |
| CN104861683A (en) | High-strength flame retardant polyvinyl chloride plastic wood material and preparation method thereof | |
| CN102911457A (en) | Acrylonitrile butadiene styrene (ABS) blending modification polyvinyl chloride (PVC) spool and preparation method thereof | |
| CN104861325A (en) | Nano kaolin modified polyvinyl chloride (PVC) plastic wood composite material and preparation method thereof | |
| CN104861681A (en) | Environmentally friendly polyvinyl chloride plastic wood composite material and preparation method thereof | |
| CN103613913A (en) | Halogen-free flame-retardant thermoplastic polyester elastomer material and preparation method thereof | |
| CN103694573B (en) | A kind of automotive upholstery color inhibition PP/HDPE plastics and preparation method thereof | |
| CN104861680A (en) | Wood powder/polyethylene composite material and preparation method thereof | |
| CN101113233B (en) | PC/ABS waste recovering formula | |
| CN103910994A (en) | Preparation method for reinforced toughened flame-retardant nylon special material | |
| CN104845244A (en) | Carbon fiber reinforced and nano-bamboo carbon antibacterial PTT functional masterbatch | |
| CN101709145A (en) | Halogen-free glass fiber enhanced nylon 66 material and manufacturing process thereof | |
| CN104861625A (en) | Nano silicon dioxide modified polycarbonate plastic wood material and preparation method thereof | |
| CN110819010A (en) | Halogen-free flame-retardant polypropylene material with ultrahigh specific gravity and preparation method thereof | |
| CN104341759A (en) | Nanoscale flame retardant reinforced polycarbonate and preparation method | |
| CN104861678A (en) | Polycarbonate/wood powder composite material capable of replacing wood | |
| CN104419149A (en) | Carbon fiber reinforced and environment-friendly flame-retardant PBT(polybutylene terephthalate)/PET (polyethylene terephthalate) alloy | |
| CN103360777B (en) | A kind of flame-retardant wood-plastic composite material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150826 |
|
| WD01 | Invention patent application deemed withdrawn after publication |