CN104946204A - High-capture foamed coal dust inhibitor and preparation method thereof - Google Patents

High-capture foamed coal dust inhibitor and preparation method thereof Download PDF

Info

Publication number
CN104946204A
CN104946204A CN201510269898.7A CN201510269898A CN104946204A CN 104946204 A CN104946204 A CN 104946204A CN 201510269898 A CN201510269898 A CN 201510269898A CN 104946204 A CN104946204 A CN 104946204A
Authority
CN
China
Prior art keywords
coal dust
dust inhibitor
water
expansion type
catches
Prior art date
Application number
CN201510269898.7A
Other languages
Chinese (zh)
Other versions
CN104946204B (en
Inventor
朱开金
谭俊华
赵彦亮
刘菲
彭军辉
朱鹏宇
Original Assignee
太原工业学院
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 太原工业学院 filed Critical 太原工业学院
Priority to CN201510269898.7A priority Critical patent/CN104946204B/en
Publication of CN104946204A publication Critical patent/CN104946204A/en
Application granted granted Critical
Publication of CN104946204B publication Critical patent/CN104946204B/en

Links

Abstract

The invention relates to a high-capture foamed coal dust inhibitor and a preparation method thereof, belonging to the technical fields of high-polymer materials and environmental protection. The coal dust inhibitor is prepared from 0.6-0.8% of hydroxypropyl starch ether, 0.10-0.15% of sodium carboxyethyl cellulose, 1.0-1.5% of crosslinking agent, 0.01-0.1% of initiator, 0.3-0.5% of foaming agent, 0.2-0.3% of foam stabilizer and the balance of water. The preparation method comprises the following steps: (1) adding water into the sodium carboxyethyl cellulose and hydroxypropyl starch ether, heating to 70-80 DEG C, and directly adding the crosslinking agent and initiator to react; and (2) after the reaction finishes, adding the foaming agent, foam stabilizer and water, and evenly mixing to obtain the coal dust inhibitor. The foamed coal dust inhibitor has the advantages of favorable properties, simple preparation method and low production cost, is simple to use and operate, can effectively protect the environment, and has favorable social and economic benefits.

Description

High seizure expansion type coal dust inhibitor and preparation method thereof
Technical field
The present invention relates to high seizure expansion type coal dust inhibitor and preparation method thereof, belong to macromolecular material and environmental technology field.
Background technology
Coal exploitation, transport and stacking process in, because airborne dust causes a certain amount of loss and the pollution to environment.Particularly transportation by railroad, in handling and transportation, because of the generation airborne dust that jolts of road, adds wind effect, airborne dust can be made more violent; Also can cause the pollution caused by coal dust that transport is along the line on the other hand, impact transport crop growth along both side, severe contamination rail facility.
For solving airborne dust that wind erosion in coal mining, transport and stacking process and water erosion cause, washing away the problems such as loss, environmental pollution, address this problem in prior art is at coal surface sprinkling coal dust inhibitor, make its surface crust, to reduce airborne dust, but this method effect is general.All dirt weak effect is caught in existence to the various dust-inhibitors developed at present in actual use, film forming cured layer thickness that is long, that formed time of coagulation does not reach the defects such as service requirements, and cohesive strength and toughness poor, thus its use properties of extreme influence and applying.And the technology of the present invention overcomes above-mentioned many deficiencies, can substantially catch the Coal Dust suspended in air, and film forming is short for time of coagulation by foaming, shortens 2 ~ 3min than existing dust-inhibitor, cohesive strength improves 30 ~ 40%.
Summary of the invention
The present invention aims to provide one high seizure expansion type coal dust inhibitor, solves existing coal dust inhibitor and there is thorough to flue coal dust seizure, that film forming length time of coagulation, cohesive strength and toughness are poor problem in use.
The invention provides high seizure expansion type coal dust inhibitor, it is characterized in that: described coal dust inhibitor is made up of the raw material of following weight percents:
Hydroxypropyl starch ether: 0.6 ~ 0.8%;
Sodium hydroxyethlcellulose: 0.10 ~ 0.15%;
Linking agent: 1.0 ~ 1.5%;
Initiator: 0.01 ~ 0.1%;
Whipping agent: 0.3 ~ 0.5%;
Suds-stabilizing agent: 0.2 ~ 0.3%;
All the other are water.
Further, described linking agent is any one in two Methacrylamide, phosphorus oxychloride, hexanodioic acid.
Further, described initiator is any one in ammonium persulphate, dicumyl peroxide, dibenzoyl peroxide.
Further, described whipping agent is any one in α-sodium olefin sulfonate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate.
Further, described suds-stabilizing agent is any one in polyoxyethylenated alcohol sodium sulfate, alkylphenol polyoxyethylene, methoxy poly (ethylene glycol).
Coal dust inhibitor of the present invention, can be made into liquid-type, also to can be made into solid type.
The invention provides the preparation method that a kind of above-mentioned height catches expansion type coal dust inhibitor, comprise the following steps:
(1) first sodium hydroxyethlcellulose, hydroxypropyl starch ether are added in water, are heated to 70 ~ 80 DEG C, make it dissolve completely, then the linking agent directly added wherein and initiator react;
(2) said mixture reaction 2 ~ 3h, after having reacted, adds whipping agent, suds-stabilizing agent wherein, and the stirring that adds water, the height mixing and obtain liquid-type catches expansion type coal dust inhibitor.
A kind of preferred technical scheme is provided below, comprises the following steps:
0.5g sodium hydroxyethlcellulose, 3.5g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, add the α-sodium olefin sulfonate of 1.5g and the alkylphenol polyoxyethylene of 1.0g, add the height seizure expansion type coal dust inhibitor that 100mL water mixed and obtained liquid-type.
The invention provides the preparation method that a kind of described height catches expansion type coal dust inhibitor, comprise the following steps:
(1) first sodium hydroxyethlcellulose, hydroxypropyl starch ether are added in water, are heated to 70 ~ 80 DEG C, make it dissolve completely, then the linking agent directly added wherein and initiator react;
(2) said mixture reaction 2 ~ 3h, after having reacted, dries material dewatering, then adds whipping agent and suds-stabilizing agent mixing in proportion, and the height obtaining solid type catches expansion type coal dust inhibitor.
A kind of preferred technical scheme is provided below, comprises the following steps:
0.5g sodium hydroxyethlcellulose, 3.0g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, dried by material dewatering, add the α-sodium olefin sulfonate of 1.5g and the alkylphenol polyoxyethylene of 1.0g, the height mixing and obtain solid type catches expansion type coal dust inhibitor.
The height of the solid type provided in aforesaid method catches expansion type coal dust inhibitor, convenient transportation.The height being mixed with liquid-type during use by adding water catches expansion type coal dust inhibitor: gained solid coal dust inhibitor powder dissolves and stirs and obtain liquid-type coal dust inhibitor after mixing (referring to that the powder of 1.0g ~ 2.0g joins the water of 100g) with water in 1.0 ~ 2.0% ratios.
Height provided by the invention catches in expansion type coal dust inhibitor formula, sodium hydroxyethlcellulose, hydroxypropyl starch ether are all polyhydric macromolecular cpds, crosslinking reaction is carried out after adding linking agent and initiator, part of hydroxyl is made to become carboxyl, hydroxyl and the mutual grafting dehydration of carboxyl, form network structure, the viscosity of the macromolecule product of generation increases; Add whipping agent and suds-stabilizing agent, the effect that dust-inhibitor catches coal dust manifests more, and can reach to catch and catch to the greatest extent, and film forming is short for time of coagulation, cohesive strength greatly improves.
Of the present invention beneficial effect:
(1) the present invention utilizes and has the inorganic, organic of certain characteristic and polymer substance and be dissolved in water and form, and the product obtained is environment-friendly type fluxion, tasteless, nontoxic, harmless, corrosion-free, nonflammable, on ature of coal without impact;
(2) when coal subsurface excavation, train or automobile shipment coal, this agent is sprayed by sprinkling system, 100% can catch floating coal dust, coal surface is made to form the thick cured layer of one deck 5 ~ 10mm immediately, 2 ~ 3min faster than general coal dust time of coagulation, cohesive strength improves 30 ~ 40%, (general coal dust inhibitor 5 ~ 6min, and this inhibitor is about 3min time of coagulation; The cohesive strength of general coal dust inhibitor is 2 ~ 3mPa, and this inhibitor cohesive strength 3 ~ 4mPa), kicking up again of dust when wind-force is greater than more than seven grades in Coal Transport process can be prevented.
(3) gained coal dust inhibitor of the present invention; preparation method is simple, it is easy and simple to handle to use; production cost is lower; be convenient to operation implement and meet environmental requirement; both exploitation and traffic unit and coal customers can have been made to reduce the loss; also can available protecting environment, there is good Social benefit and economic benefit.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
Embodiment 1: 0.5g sodium hydroxyethlcellulose, 3g hydroxypropyl starch ether are joined in the water of 80 DEG C of 350mL, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, add the α-sodium olefin sulfonate of 2.0g and the alkylphenol polyoxyethylene of 1.0g, add 100mL water and mix and obtain high seizure expansion type coal dust inhibitor.
In order to verify the result of use of coal dust depressor of the present invention, entrust quality technical supervision verification test in Shanxi province Taiyuan city to test to this product, the detected result of gained is in table 1:
Note: (1) wind erosion rate measuring method:
1. get the coal sample 6kg of 20 mesh sieves, in the baking oven of 70 ~ 80 DEG C, dry 1h;
2. get 3 enamel pallets, average mark three parts of coal samples add respectively;
3. spray this liquid dust-inhibitor in the coal sample surface 10s time with honeycomb sprinker respectively, weigh after leaving standstill 1h, namely obtain coal sample wind erosion rate with coal sample reduction divided by the coal sample amount before wind.
(2) cured layer thickness measurement: appoint and get 3 place's cured layers, divides with vernier callipers and surveys its thickness, then calculate mean value and get final product.
As can be seen from Table 1, the viscosity of the present embodiment products obtained therefrom is 18mPas, wind erosion rate 0.10%, and cured layer thickness is 15mm.
Embodiment 2: 0.5g sodium hydroxyethlcellulose, 3.0g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, dried by material dewatering, add the Sodium dodecylbenzene sulfonate of 1.3g and the alkylphenol polyoxyethylene of 1.0g, the height mixing and obtain solid type catches expansion type coal dust inhibitor.
The viscosity of the present embodiment products obtained therefrom is 16mPas, wind erosion rate 0.08%, and cured layer thickness is 13mm.
Embodiment 3: 0.5g sodium hydroxyethlcellulose, 3.0g hydroxypropyl starch ether are added in 380mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add the phosphorus oxychloride of 6g wherein, the dibenzoyl peroxide of 0.1g, after stirring reaction 2.5h, add the sodium lauryl sulphate of 1.6g and the polyoxyethylenated alcohol sodium sulfate of 1.0g, add 100mL water and mix and obtain high seizure expansion type coal dust inhibitor.
The viscosity of the present embodiment products obtained therefrom is 15mPas, wind erosion rate 0.06%, and cured layer thickness is 14mm.
Embodiment 4: 0.5g sodium hydroxyethlcellulose, 4.0g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 75 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add the phosphorus oxychloride of 6.0g wherein, the dibenzoyl peroxide of 0.1g, after stirring reaction 2.5h, add the α-sodium olefin sulfonate of 1.5g and the polyoxyethylenated alcohol sodium sulfate of 1.0g, add 100mL water and mix and obtain high seizure expansion type coal dust inhibitor.
The viscosity of the present embodiment products obtained therefrom is 16mPas, wind erosion rate 0.06%, and cured layer thickness is 15mm.
Embodiment 5: 0.5g sodium hydroxyethlcellulose, 4.1g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 70 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add the phosphorus oxychloride of 5.5g wherein, the dibenzoyl peroxide of 0.1g, after stirring reaction 2.5h, add the α-sodium olefin sulfonate of 1.8g and the polyoxyethylenated alcohol sodium sulfate of 1.5g, add 100mL water and mix and obtain high seizure expansion type coal dust inhibitor.
The viscosity of the present embodiment products obtained therefrom is 17mPas, wind erosion rate 0.05%, and cured layer thickness is 14mm.
The height of the solid type provided in aforesaid method catches expansion type coal dust inhibitor, convenient transportation.The height being mixed with liquid-type during use by adding water catches after expansion type coal dust inhibitor gained solid coal dust inhibitor powder mixes (referring to that the powder of 1.0 ~ 2.0g joins the water of 100g) in 1.0 ~ 2.0% ratios with water, dissolves and stirs and obtain liquid-type coal dust inhibitor.

Claims (9)

1. high seizure expansion type coal dust inhibitor, is characterized in that: described coal dust inhibitor is made up of the raw material of following weight percents:
Hydroxypropyl starch ether: 0.6 ~ 0.8%;
Sodium hydroxyethlcellulose: 0.10 ~ 0.15%;
Linking agent: 1.0 ~ 1.5%;
Initiator: 0.01 ~ 0.1%;
Whipping agent: 0.3 ~ 0.5%;
Suds-stabilizing agent: 0.2 ~ 0.3%;
All the other are water.
2. height according to claim 1 catches expansion type coal dust inhibitor, it is characterized in that: described linking agent is any one in two Methacrylamide, phosphorus oxychloride, hexanodioic acid.
3. height according to claim 1 catches expansion type coal dust inhibitor, it is characterized in that: described initiator is any one in ammonium persulphate, dicumyl peroxide, dibenzoyl peroxide.
4. height according to claim 1 catches expansion type coal dust inhibitor, it is characterized in that: described whipping agent is any one in α-sodium olefin sulfonate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate.
5. height according to claim 1 catches expansion type coal dust inhibitor, it is characterized in that: described suds-stabilizing agent is any one in polyoxyethylenated alcohol sodium sulfate, alkylphenol polyoxyethylene, methoxy poly (ethylene glycol).
6. the height described in any one of claim 1 ~ 5 catches a preparation method for expansion type coal dust inhibitor, it is characterized in that: comprise the following steps:
(1) first sodium hydroxyethlcellulose, hydroxypropyl starch ether are added in water, are heated to 70 ~ 80 DEG C, make it dissolve completely, then the linking agent directly added wherein and initiator react;
(2) said mixture reaction 2 ~ 3h, after having reacted, adds whipping agent, suds-stabilizing agent wherein, and the stirring that adds water, the height mixing and obtain liquid-type catches expansion type coal dust inhibitor.
7. height according to claim 6 catches the preparation method of expansion type coal dust inhibitor, it is characterized in that: comprise the following steps:
0.5g sodium hydroxyethlcellulose, 3.5g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, add the α-sodium olefin sulfonate of 1.5g and the alkylphenol polyoxyethylene of 1.0g, add 100mL water and mix and obtain high seizure expansion type coal dust inhibitor.
8. the height described in any one of claim 1 ~ 5 catches a preparation method for expansion type coal dust inhibitor, it is characterized in that: comprise the following steps:
(1) first sodium hydroxyethlcellulose, hydroxypropyl starch ether are added in water, are heated to 70 ~ 80 DEG C, make it dissolve completely, then the linking agent directly added wherein and initiator react;
(2) said mixture reaction 2 ~ 3h, after having reacted, dries material dewatering, then adds whipping agent and suds-stabilizing agent mixing in proportion, and the height obtaining solid type catches expansion type coal dust inhibitor.
9. height according to claim 8 catches the preparation method of expansion type coal dust inhibitor, it is characterized in that: comprise the following steps:
0.5g sodium hydroxyethlcellulose, 3.0g hydroxypropyl starch ether are added in 400mL water, the temperature of water is 80 DEG C, it is made to dissolve completely, to be cooled to room temperature time, add two Methacrylamides of 5.0g wherein, the ammonium persulphate of 0.05g, after stirring reaction 2h, material dewatering is dried, adds the α-sodium olefin sulfonate of 1.5g and the alkylphenol polyoxyethylene of 1.0g, mix and obtain high seizure expansion type coal dust inhibitor.
CN201510269898.7A 2015-05-25 2015-05-25 It is high to catch expansion type coal dust inhibitor and preparation method thereof CN104946204B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510269898.7A CN104946204B (en) 2015-05-25 2015-05-25 It is high to catch expansion type coal dust inhibitor and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510269898.7A CN104946204B (en) 2015-05-25 2015-05-25 It is high to catch expansion type coal dust inhibitor and preparation method thereof

Publications (2)

Publication Number Publication Date
CN104946204A true CN104946204A (en) 2015-09-30
CN104946204B CN104946204B (en) 2017-04-05

Family

ID=54161280

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510269898.7A CN104946204B (en) 2015-05-25 2015-05-25 It is high to catch expansion type coal dust inhibitor and preparation method thereof

Country Status (1)

Country Link
CN (1) CN104946204B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105400494A (en) * 2015-12-31 2016-03-16 威海翔宇环保科技股份有限公司 Rapidly infiltrating dust inhibitor
CN106905924A (en) * 2015-12-23 2017-06-30 北京普净环境科技有限公司 A kind of environmental protection coal ash catches sedimentation agent and preparation method thereof
CN106964494A (en) * 2017-05-17 2017-07-21 太原工业学院 A kind of low-cost high-efficiency flotation agent for coal slurry
CN108467710A (en) * 2018-04-04 2018-08-31 夏侯文奇 A kind of Biomimetic membranes dust inhibitor and preparation method thereof
CN109135675A (en) * 2018-09-26 2019-01-04 深圳市天得环境科技有限公司 A kind of dust suppressant preparation method with catalysis
CN110079274A (en) * 2019-06-04 2019-08-02 南京大学 A kind of hydrophilic, oleophylic both sexes dust inhibitor and its preparation method and application

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951993A (en) * 1982-09-17 1984-03-26 Mitsubishi Acetate Co Ltd Coal dust inhibitor
US4610311A (en) * 1983-02-15 1986-09-09 Sanitek Products, Inc. Method for reducing the aerial drift of aqueous preparations
CN101067076A (en) * 2007-06-28 2007-11-07 潘德顺 Foamed dust adhering agent and its prepn and application
KR20110018471A (en) * 2009-08-18 2011-02-24 오은하 Composition of asbestos scattering inhibitor for construction field
CN102102010A (en) * 2009-12-18 2011-06-22 淮南矿业(集团)有限责任公司 Foam dust arresting liquid and dust collecting method
CN103045170A (en) * 2012-09-10 2013-04-17 山西中阳实业有限公司 Method for preparing high-performance coal dust suppressant
CN103806930A (en) * 2014-03-03 2014-05-21 山东科技大学 Novel foam dedusting agent for coal mine
KR20140078594A (en) * 2014-06-01 2014-06-25 황성규 Dust Reducing Agent for Iron powder and Dust Scattering in a Subway Tunnel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951993A (en) * 1982-09-17 1984-03-26 Mitsubishi Acetate Co Ltd Coal dust inhibitor
US4610311A (en) * 1983-02-15 1986-09-09 Sanitek Products, Inc. Method for reducing the aerial drift of aqueous preparations
CN101067076A (en) * 2007-06-28 2007-11-07 潘德顺 Foamed dust adhering agent and its prepn and application
KR20110018471A (en) * 2009-08-18 2011-02-24 오은하 Composition of asbestos scattering inhibitor for construction field
CN102102010A (en) * 2009-12-18 2011-06-22 淮南矿业(集团)有限责任公司 Foam dust arresting liquid and dust collecting method
CN103045170A (en) * 2012-09-10 2013-04-17 山西中阳实业有限公司 Method for preparing high-performance coal dust suppressant
CN103806930A (en) * 2014-03-03 2014-05-21 山东科技大学 Novel foam dedusting agent for coal mine
KR20140078594A (en) * 2014-06-01 2014-06-25 황성규 Dust Reducing Agent for Iron powder and Dust Scattering in a Subway Tunnel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106905924A (en) * 2015-12-23 2017-06-30 北京普净环境科技有限公司 A kind of environmental protection coal ash catches sedimentation agent and preparation method thereof
CN106905924B (en) * 2015-12-23 2019-04-05 北京嘉孚科技有限公司 A kind of environmental protection coal ash captures sedimentation agent and preparation method thereof
CN105400494A (en) * 2015-12-31 2016-03-16 威海翔宇环保科技股份有限公司 Rapidly infiltrating dust inhibitor
CN106964494A (en) * 2017-05-17 2017-07-21 太原工业学院 A kind of low-cost high-efficiency flotation agent for coal slurry
CN108467710A (en) * 2018-04-04 2018-08-31 夏侯文奇 A kind of Biomimetic membranes dust inhibitor and preparation method thereof
CN109135675A (en) * 2018-09-26 2019-01-04 深圳市天得环境科技有限公司 A kind of dust suppressant preparation method with catalysis
CN110079274A (en) * 2019-06-04 2019-08-02 南京大学 A kind of hydrophilic, oleophylic both sexes dust inhibitor and its preparation method and application

Also Published As

Publication number Publication date
CN104946204B (en) 2017-04-05

Similar Documents

Publication Publication Date Title
CN104129943B (en) Wet mixing mortar admixture and its preparation method and application
CN102838816B (en) New macromolecule fiber composite material
CN105503052B (en) A kind of anti-cracking type high performance concrete and preparation method thereof
CN103059336B (en) High-flame-retardance composite heat-insulating foam material and preparation method thereof
CN103613904B (en) A kind of Low-density low-acidicity phenol formaldehyde foam board and preparation technology thereof
CN104030724B (en) Sulfur-oxygen-magnesium gelling material fire door core board and manufacture method thereof
CN104231857A (en) Composite epoxy anticorrosive paint and preparation method thereof
US20150158999A1 (en) Water-resistant products using a wax emulsion
CN105849166B (en) Phenol resin foam
CN103483717B (en) A kind of imitative wood grain Masterbatch and preparation method thereof and application
CN104070572B (en) A kind of preparation method and application of multi-functional timber dip resin modifying agent
CN101851452B (en) Low-temperature regional water-based damping coating and preparation method thereof
CN102558758B (en) Phenolic resin foam material and preparing method thereof
CN103184034B (en) Ecological environment-friendly dust inhibitor
CN102295915B (en) Dust inhibitor
CN103740122B (en) A kind of self-adhesive polymer modified bituminous polyester fiber waterproof sheet material and preparation method thereof
CN106318128A (en) Outdoor ultrathin fireproof coating
CN102329566A (en) High-permeability liquid rubber spray coating
CN103406968B (en) High-grade environment-friendly flame-retardant fiberboard and manufacturing method thereof
TW201416225A (en) Pregelatinized starch with mid-range viscosity, and product, slurry and methods related thereto
CN105037648A (en) Slump-retaining water-reducing polycarboxylic acid water reducing agent and low-temperature quick preparation method thereof
CN103865025B (en) A kind of inherent flame retardant RPUF
CN102167949B (en) HFC-365mfc/227-type environment-friendly polyurethane composite paint and preparation method thereof
CN104592697B (en) Low-density and high-flame-retardant composite porous material and preparation method and application thereof
CN102471154B (en) Curing or sealing compositions for concrete and cement formulations and processes for using the same

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170405

Termination date: 20180525

CF01 Termination of patent right due to non-payment of annual fee