CN102993910A - Anticorrosion conductive powder coating for mine anchoring steel strands - Google Patents
Anticorrosion conductive powder coating for mine anchoring steel strands Download PDFInfo
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- CN102993910A CN102993910A CN 201210528869 CN201210528869A CN102993910A CN 102993910 A CN102993910 A CN 102993910A CN 201210528869 CN201210528869 CN 201210528869 CN 201210528869 A CN201210528869 A CN 201210528869A CN 102993910 A CN102993910 A CN 102993910A
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Abstract
The invention relates to an anticorrosion conductive powder coating for mine anchoring steel strands, which comprises the following raw materials by weight: 650-800 parts of special epoxy resin; 50-150 parts of curing agents; 20-50 parts of conductive pigment; 100-150 parts of functional filling materials; 30-50 parts of additives; the powder coating is prepared by the following steps: adding the above materials into a high speed blender mixer, performing dry mixing, adding the materials into an extruder, at an extrusion temperature of 80-90 DEG C, performing melting, mixing, cooling and tabletting, performing grinding by a grinder, grading, sieving and packaging to obtain the finished product of the powder coating. The powder coating of the invention is high in conductivity, capable of flame retardation, high in glass transition temperature, and rapid in curing, has anticorrosion property, has a conductive value of up to 106 ohm, is an ideal antistatic coating, and provides fireproof and explosion-proof safety guarantee.
Description
Technical field
The invention belongs to paint field, relate to the protective coating of mine anchoring steel strand, the anticorrosion proprietary powder coatings of especially a kind of mine anchoring steel strand.
Background technology
In the coal mining industry, the mine, colliery tunnel support and ground anchorage all adopt large specification prestress wire, " three high disturbances " (highland pressure for the deep coalmining existence, High-geotemperature, high karst hydraulic pressure and strong exploitation disturbance) problem, according to institute of coal section " three high one is low " (high strength is proposed, high stiffness, high reliability, reduction support density) principle, no matter from diameter and structure, all require steel strand to have " three high one is low " (high strength, high breaking force, height extends and 1 * 7 structural support cost is low on year-on-year basis) characteristics, thus, promoted forcefully the development of roadway support, especially good action has been played in colliery and rock improvement field increase anchor force raising safety coefficient.And steel strand pre-buried after, long term operation in severe environment, must be anticorrosion, anti-electrostatic, anti-burning be very important link, be safe important guarantee.Electrostatic accumulation easily produces and sparks, if inflammable gas or flammable liquid volatile matter are arranged in the surrounding medium, just may blast, and causes great personnel casualty accidents and damage to property.This series products manufacturer all takes into full account this problem mostly in when design, requires product coating not only to have excellent antiseptic property, also will possess good conductivity, non-inflammability, the easy factor such as being coated with property, low cost.
The steel strand that used on the colliery in the past adopt naked steel strand more, do not adopt any coating protection measure.The mine that has will use for many years, the high temperature that has, and the low temperature that has, and the environment potential of hydrogen differs, and corrosion phenomenon is serious, causes a hidden trouble to safety.Therefore, have the steel strand of corrosion protection coating protection, can improve security and work-ing life, become in the industry common recognition.Exploitation conduction fire retardant, anticorrosive coating for steel strand are put on vest, is not lost again bond stress simultaneously, becomes a kind of trend.
By understanding, not yet find to meet his factory's coating products of above-mentioned functions.
By retrieval, find the following publication document that relates to the steel strand coating:
1, a kind of dedicated epoxy powder paint for steel strand with thick coating and preparation method thereof (CN1962779), that will to contain weight ratio be 60～65wt% Resins, epoxy base-material, 15～18wt% solidifying agent, 0.5～1.5wt% curing catalyst, 8～10wt% rubber toughening agent, 2-10wt% color stuffing, 2～4wt% flow agent, 0.5～1wt% defoamer, after mixing, after melt extruding in the twin screw extruder, again through compressing tablet, pulverizing, levigate making.
2, a kind of filling type epoxy powder coating for steel strands and preparation method thereof (CN101613561), it consists of that to contain weight ratio be 60-70wt% Resins, epoxy base-material, 15-20wt% solidifying agent, 0.2-1.0wt% curing catalyst, 5-15wt% rubber toughening agent, 1-5wt% filler, 0.5-2wt% pigment, 1-4wt% flow agent, 0.5-2wt% adhesion promoter, 0.1-1.0wt% air release agent epoxide powder coating; After above component mixed, melt extrude through twin screw extruder, again through compressing tablet, pulverizing, the levigate epoxide powder coating that obtains.This epoxide powder coating is coated in space between steel strand outside surface and the every steel wire.
By the technical characterictic contrast, above-mentioned publication document and patent application of the present invention have more different.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, provide a kind of can conduction, can be anticorrosion, can be fire-retardant, the durable coating coating of the high low-temperature transformation of tolerance, this coating once gets final product thick being coated with, utilize steel strand production thermal treatment later stage waste heat to apply, construction is simple, save the energy, the coating equipment advantage such as less that takes up room, institute's coating layer has excellent bend ductility and higher bond stress performance.
The technical solution adopted for the present invention to solve the technical problems is:
The anticorrosion conductive powder paint of a kind of mine anchoring steel strand, its raw material consists of component and parts by weight are respectively:
And, the mixture that described Resins, epoxy is comprised of CYD804U Resins, epoxy, 907 Resins, epoxy, o-cresol formaldehyde epoxy resin, its part by weight is: CYD804U Resins, epoxy: 907 Resins, epoxy: o-cresol formaldehyde epoxy resin=50-70:50-70:7-10.
And described solidifying agent is that glyoxal ethyline, dihydroxyphenyl propane are the linear resin of end group.
And described conducting pigment is superconductive carbon black.
And, described functional stuffing is the mixture of mica powder, torispherical silicon powder, magnesium hydroxide aluminium powder, silicone liquid coupling agent, and its part by weight is: the little powder ︰ of the female powder ︰ torispherical silicon of cloud magnesium hydroxide aluminium powder ︰ silicone liquid coupling agent=6 ︰, 10 ︰, 4 ︰ 1.
And described auxiliary agent is 788 flow agents, polyvinyl butyral acetal, benzoic mixture, and its part by weight is: 788 flow agents: polyvinyl butyral acetal: st-yrax=3 ︰, 2 ︰ 1.
Advantage of the present invention and positively effect are:
1, the present invention adopts the long-chain rubber modified epoxy resin of repeating unit 3-7, is equipped with heavy anti-corrosive type o-cresol formaldehyde resin, has improved erosion resistance, bending resistance, and strong adhesion, does not ftracture, and does not peel off, and preservative property are excellent.
2, the present invention adopts phenolic hydroxyl group long-chain solidifying agent, with the modified imidazole catalytic curing in the hope of reaching the target of fast setting, for improving the cleanliness factor of Resins, epoxy, abandon the high shortcoming of the residual chlorine dose of general WATER-WASHING METHOD (residual chlorine dose height is fatal defective for the infringement of anticorrosion coat), adopt the high-purity production technique of solvent method, adopt intermediate frequency thermal treatment later stage waste heat fast setting during application, also available ordinary hot baking oven is heating and curing, use checking through client's actual production, simple to operation, be fit to automation paint, coat-thickness is easy to control, energy efficient and labour cost are remarkable, obtain preferably anticorrosion detection effect.
3, coating of the present invention is the novolac epoxy resin molecular structure, not only contain more phenyl ring and hydroxyl, and long flexible chain arranged, be to aim at the double antiseptic powder coating design, fabulous intermiscibility is arranged, reactive behavior is high, very strong adhesive power is arranged, but fast setting, cross-linking density is high, films to have remarkable rigidity and the mechanical propertys such as humidity resistance, chemical-resistant, solvent resistance, anti-cathodic disbonding, levelling property and snappiness, shock resistance.
4, the present invention selects the ultrafine electricity conductive carbon black as pigment, utilizes conductive doped principle, and material is easily got, and moderate cost makes the surface resistivity of coating only have 10
6Below ohm, any static all can be led away fast, the possibility of absolutely not gathering.
5, the prepared anticorrosion conductive powder paint of mine anchoring steel strand of the present invention is mainly used in the coating that the mine ground anchorage is used steel strand, the coating that generates detects through relevant authoritative department, conductivity and antiseptic property are excellent, can reach the standard of MT558.6-201X fully, this standard is the mandatory industry standard that fire-resistant antistatic institute of coal science institute formulates, it requires the corrosion protection coating of mine support equipment all will by the detection of this standard, just can be allowed to use in the construction material of colliery.
Description of drawings
Fig. 1 is the design sketch after steel strand of the present invention apply.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The anticorrosion conductive powder paint of a kind of mine anchoring steel strand, its raw material consists of component and parts by weight are respectively:
The preparation method is: above-mentioned each material is added to high speed mixer by weight, behind dry blending, be added to forcing machine, carry out conventional melting, mixing, cooling, compressing tablet at extrusion temperature 90-110 ℃, again through pulverizer pulverizing, classification, sieve, pack, namely become the powder coating final product.
The below narrates respectively formation and the function of each raw material:
1, Resins, epoxy is the mixture of three kinds of Resins, epoxy, and its each component consists of and the optimum weight umber is respectively:
CYD804U Resins, epoxy: 250--350;
907 Resins, epoxy: 250--350;
O-cresol formaldehyde epoxy resin: 35--50.
The thinking of single Resins, epoxy kind in the protective system before the present invention abandons, adopt the different epoxy-resin systems of different kinds of molecules structure, combine with the CYD804U rubber modified epoxy resin to arrange in pairs or groups by a certain percentage and use such as long carbochain 907H epoxy, polyfunctional group ECN o-cresol formaldehyde epoxy resin, macromole complementary networks structure, form fine and close coating, the mean polymerisation degree of contained Resins, epoxy should be controlled between 4～9.
2, solidifying agent adopts imidazoles and phenols curing agent, be linear resin (the appearance white crystal of end group for glyoxal ethyline, dihydroxyphenyl propane, fusing point ℃ 143.0～146.0, content % 〉=99.5), purpose is for making coating low temperature fast setting and having heavy anti-corrosion function, to improve film flexibility, increase the probability of winding, embedding, the poly-hydroxy structure that the while solidifying agent has has also improved the sticking power to base material.
3, conducting pigment: the ultrafine electricity conductive carbon black forms, and its optimum weight umber is respectively: graphitized carbon black: 20--50.
The widest conductive doped as main take conductive carbon black of present stage purposes on market, its output comes first of conductive articles.When conductive carbon black content is low, surface resistivity substantially not have to change or variation very little, along with the increase of conductive carbon black content, the surface resistivity slow decreasing; Surface resistivity declines to a great extent when reaching percolation threshold, forming the curve of one section steeper. the distance that most of conductive carbon black particles this moment be describeds is reduced to and is enough to contact with adjacent particles or by electronics jump circuitous formation continuous conductive path or conductive network, thereby the surface resistivity sudden change occurs and tend towards stability above the surface resistivity variation of powder coating behind the percolation threshold.
4, functional filler: the mixture of mica powder, torispherical silicon powder, magnesium hydroxide aluminium powder, silicone liquid coupling agent, its weight ratio is respectively: the little powder ︰ of the female powder ︰ torispherical silicon of cloud magnesium hydroxide aluminium powder ︰ silicone liquid coupling agent=30 ︰, 50 ︰, 20 ︰ 5.
Above-mentioned three kinds of ultrafine solids filler same liquid silicon coupling agents mix use, and the mica powder microtexture is arranged in fish scale-shaped after formation is painted in the form of sheets, prevents the infiltration of extraneous water molecules and acid-alkali salt, and the heavy anti-corrosion function that improves coating is of great importance; The torispherical silicon powder itself does not burn, and the magnesium hydroxide aluminium powder is good fire retardant, more than each material easily obtain, cost is low, but does not reduce the properties of filming.With the first high speed premix of above material, mixed rear sealing slaking mixes with other raw materials after 48 hours again, to increase coating to wettability and the sticking power of steel strand.
5, auxiliary agent: auxiliary agent is 788 flow agents, polyvinyl butyral acetal, benzoic mixture, and its part by weight is: 788 flow agents: polyvinyl butyral acetal: st-yrax=9 ︰, 6 ︰ 3.
Above material effect mainly is melt substance levelling property when increasing application, removes bubble, makes coating finer and close, prevents the infiltration of objectionable impurities in the environment, improves the rot-resistant performance.Polyvinyl butyral acetal itself is the stronger material of plasticity, can improve the bend ductility of coating, reaches to reverse also indehiscent performance requriements.
Various raw material of the present invention is the commercially available prod.
The present invention has guaranteed that the high conductivity of coating, heavy preservative property, high glass transition temperature, warping resistance, snappiness significantly improve, and the sticking power of coating, corrosion resistance have also passed through the detection of national relevant industries standard.
Practical application effect and test situation:
One, coating is tested its resistance by surface resistivity and is: 106(Ω .m) this index reflection is conductive coating performance
Two, satisfy domestic antistatic aids manufacturing enterprise and apply requirement, and carried out the batch production practice.
Mainly be exclusively used in the coating of mine anchoring steel strand.
The various experimental performance parameters of this powder coating:
The formed coating performance parameter of this powder coating
Claims (6)
1. anticorrosion conductive powder paint of mine anchoring steel strand is characterized in that: its raw material consists of component and parts by weight are respectively:
2. the anticorrosion conductive powder paint of mine anchoring steel strand according to claim 1, it is characterized in that: the mixture that described Resins, epoxy is comprised of CYD804U Resins, epoxy, 907 Resins, epoxy, o-cresol formaldehyde epoxy resin, its part by weight is: CYD804U Resins, epoxy: 907 Resins, epoxy: o-cresol formaldehyde epoxy resin=50-70:50-70:7-10.
3. the anticorrosion conductive powder paint of mine anchoring steel strand according to claim 1, it is characterized in that: described solidifying agent is that glyoxal ethyline, dihydroxyphenyl propane are the linear resin of end group.
4. the anticorrosion conductive powder paint of mine anchoring steel strand according to claim 1, it is characterized in that: described conducting pigment is superconductive carbon black.
5. the anticorrosion conductive powder paint of described mine anchoring steel strand according to claim 1, it is characterized in that: described functional stuffing is the mixture of mica powder, torispherical silicon powder, magnesium hydroxide aluminium powder, silicone liquid coupling agent, and its part by weight is: the little powder ︰ of the female powder ︰ torispherical silicon of cloud magnesium hydroxide aluminium powder ︰ silicone liquid coupling agent=6 ︰, 10 ︰, 4 ︰ 1.
6. the anticorrosion conductive powder paint of mine anchoring steel strand according to claim 1, it is characterized in that: described auxiliary agent is 788 flow agents, polyvinyl butyral acetal, benzoic mixture, and its part by weight is: 788 flow agents: polyvinyl butyral acetal: st-yrax=3 ︰, 2 ︰ 1.
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| CN 201210528869 CN102993910A (en) | 2012-12-10 | 2012-12-10 | Anticorrosion conductive powder coating for mine anchoring steel strands |
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| CN 201210528869 CN102993910A (en) | 2012-12-10 | 2012-12-10 | Anticorrosion conductive powder coating for mine anchoring steel strands |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103509433A (en) * | 2013-09-04 | 2014-01-15 | 安徽东方金河精密机械制造有限公司 | Epoxy powder paint special for thick-coating steel strands |
| CN104401406A (en) * | 2014-10-17 | 2015-03-11 | 珠海格力电器股份有限公司 | Transport carriage for combustible refrigerant unit and production method thereof |
| CN104497800A (en) * | 2014-12-17 | 2015-04-08 | 常熟市恒仕达电器有限公司 | Refrigerated display cabinet |
| CN106366862A (en) * | 2016-11-07 | 2017-02-01 | 付强 | Curing-free electrostatic powder coating and preparation method thereof |
| CN110093089A (en) * | 2019-05-21 | 2019-08-06 | 湖北来斯化工新材料有限公司 | A kind of warping resistance type fire-proof powdery paint and preparation method thereof |
-
2012
- 2012-12-10 CN CN 201210528869 patent/CN102993910A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103509433A (en) * | 2013-09-04 | 2014-01-15 | 安徽东方金河精密机械制造有限公司 | Epoxy powder paint special for thick-coating steel strands |
| CN104401406A (en) * | 2014-10-17 | 2015-03-11 | 珠海格力电器股份有限公司 | Transport carriage for combustible refrigerant unit and production method thereof |
| CN104497800A (en) * | 2014-12-17 | 2015-04-08 | 常熟市恒仕达电器有限公司 | Refrigerated display cabinet |
| CN106366862A (en) * | 2016-11-07 | 2017-02-01 | 付强 | Curing-free electrostatic powder coating and preparation method thereof |
| CN110093089A (en) * | 2019-05-21 | 2019-08-06 | 湖北来斯化工新材料有限公司 | A kind of warping resistance type fire-proof powdery paint and preparation method thereof |
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Application publication date: 20130327 |