CN103031024A - Marine anticorrosive powdered paint and preparation method thereof - Google Patents
Marine anticorrosive powdered paint and preparation method thereof Download PDFInfo
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- CN103031024A CN103031024A CN2012104841469A CN201210484146A CN103031024A CN 103031024 A CN103031024 A CN 103031024A CN 2012104841469 A CN2012104841469 A CN 2012104841469A CN 201210484146 A CN201210484146 A CN 201210484146A CN 103031024 A CN103031024 A CN 103031024A
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Abstract
The invention provides marine anticorrosive powdered paint and a preparation method thereof. The formula of the paint comprises polyethylene, glass flakes and zinc powder, wherein the polyethylene is one or a combination of low-density polyethylene (LDPE), medium-density polyethylene (MDPE) and high-density polyethylene (HDPE); the glass flakes are scalelike glass flakes which are 40-3000 meshes; and the glass flakes are made of alkali glass or neutral glass. According to the invention, the glass flakes and the flaky zinc powder are added in the polyethylene (PE) base, so that glass layers and zinc layers having good barrier effect are distributed in the PE powder, wherein the glass layers can resist acid, alkali, salt and water, and the scalelike glass flakes can form multiple barrier layers in the PE layer. Thus, corrosive small molecules pass through the barrier layers as if passing through a maze and need to travel on a long and tortuous road, thereby improving the anticorrosive effect.
Description
Technical field
The present invention relates to technical field of coatings, refer to especially a kind of ocean anti-corrosive powder paint and preparation method thereof.
Background technology
Ocean exploitation and utilizing in the process, the mankind have built a lot of large-scale marine structures.Consider the over-all properties of construction costs and material, these marine structures adopt intensity is high, toughness is large, price is low carbon steel and low alloy steel to make mostly.The life of common large ocean engineering formula structure is 20-30 at least, and 40-50 is on active service for the safety that guarantees these iron and steel structures at most, must take effective safeguard procedures to it.
At present, generally be to distinguish on the water the application organic coating to the corrosion protection design of Yu Haiyang Large Steel facilities, the district adopts cathode protection technology under water.Because organic coating is aging, efflorescence, low at the sticking power of steel surface easily, so the life-span is shorter, need to often repeat brushing, and the offshore construction condition is very arduous, difficulty is a lot, has greatly increased maintenance cost.Marine Antifouling Paint mainly contains liquid coating and thermosetting powder coating(s) at present, such as liquid epoxy coating and epoxide powder coating; It mainly utilizes in the base-materials such as Resins, epoxy or Vinylite by crosslinked or dose a layer partition shape material and make, its principle is on the basis of common coating, making increases compactness extent or stratiform barrier material formation labyrinth structure, thereby stops the micromolecular invasion of corrosion.PE is poly abbreviation, and it is the general-purpose plastics of consumption maximum, and it has wide material sources, cheap, acid and alkali-resistance, brine corrosion, and easily the characteristics of processing extensively are used in the every profession and trades such as film, pipeline, wrapping material, daily necessities, industrial accessory.Be main raw material with PE, the powder coating of system is the PE powder coating, and the range of application of PE powder coating mainly is clothes hanger, refrigerator basket, bike basket, pipeline corrosion protection, jube grid at present, guardrail net, protective board etc.The PE powder coating is used as double antiseptic powder coating; do not have in the market; its major obstacle be PE permeable, ventilation property is just large; even the PE layer is perfect; but the molecular gap of PE is large; the corrosion small molecules can see through these molecular gaps, should protected matrix metal thereby touch.So the anticorrosion life-span of PE powder coating is not oversize, especially bad especially for the large anticorrosion ability of the corrodibility such as acid, alkali, salt, so common PE powder coating can not be done the double antiseptic powder coatings such as ocean.The high-grade ocean anticorrosive powder of present domestic use is mainly by import because the domestic self-produced anticorrosion life-span of ocean anti-corrosive powder paint generally only have 5 years, under the severe environment even less than 1 year.
Summary of the invention
The present invention is directed to the problems referred to above, proposed a kind of long service life, corrosion resistant ocean anti-corrosive powder paint and preparation method thereof.
Technical scheme of the present invention is achieved in that
A kind of ocean anti-corrosive powder paint, the prescription of this coating comprise, polyethylene, glass flake and zinc powder.
As preferred technical scheme, described polyethylene is one or more the combination in Low Density Polyethylene (LDPE), medium-density polyethylene (MDPE), the high density polyethylene(HDPE) (HDPE).
As preferred technical scheme, described glass flake is 40 orders-3000 purpose foliated glass scale.
As preferred technical scheme, the material of described glass flake is alkali glass or neutral glass.
As preferred technical scheme, the addition of described glass flake in powder coating is the 5-30% of polyethylene quality.
As preferred technical scheme, the addition of described glass flake in powder coating is the 7-20% of polyethylene quality.
As preferred technical scheme, described zinc powder is the spherical or zinc flake of 40-3000 purpose.
As preferred technical scheme, the addition of described zinc powder in powder coating is the 5-30% of polyethylene quality.
As preferred technical scheme, the addition of described zinc powder in powder is the 7-20% of polyethylene quality.
As preferred technical scheme, also comprise lubricant in the described powder coating.
As preferred technical scheme, the addition of described lubricant in powder coating is the 0.1-1% of polyethylene quality.
As preferred technical scheme, described lubricant is polymer-wax, amine hydroxybenzene or erucicamide.
As preferred technical scheme, described polymer-wax is polyethylene wax (PE) or Poly Propylene Wax (PP).
As preferred technical scheme, also comprise compatilizer in the described powder coating.
As preferred technical scheme, the addition of described compatilizer in powder is preferably 5%-10%.Compatilizer can be maleic anhydride grafts, vinylformic acid or 2-hydroxy-butanedioic acid.
As preferred technical scheme, also comprise anti-aging auxiliary agent in the described powder coating.
As preferred technical scheme, the addition of described anti-aging auxiliary agent in powder coating is the 0.1-1% of polyethylene quality.
As preferred technical scheme, described anti-aging auxiliary agent is oxidation inhibitor and photostabilizer.
As preferred technical scheme, described photostabilizer is one or more the combination in UV light absorber, titanium dioxide, carbon black, the zinc oxide.
Because ocean environment is fierce general sunshine, PE powder coating layer is under this environment, and is strict to weathering resistance.In order further to improve the work-ing life of powder coating of the present invention, in powder coating, can add anti-aging auxiliary agent, such as auxiliary agents such as oxidation inhibitor, photostabilizers, guarantor's coating life under ocean environment is long, and then accomplishes an application, 10 years characteristics without pipe.
The preparation method of a kind of ocean anti-corrosive powder paint comprises:
Mix the material in the above-mentioned prescription;
The mixed described material of Screw Extrusion granulation;
Described material behind the grinding extruding pelletization, and get final product.
Above-mentioned preparation method can directly use existing equipment, and conventional processing condition get final product.
As preferred technical scheme, the processing condition of described Screw Extrusion granulation are, temperature 190-230 ℃, and rotating speed 300-500r/min.
Beneficial effect
The present invention is by adding glass flake and zinc flake in the PE base, make the barriering effect that distributing in the PE powder good glass coating and zinc layer, glass coating has the characteristic of acid-and base-resisting, salt, water, and lepidiod sheet glass is in the PE layer, can form layer by layer and intercept, and the corrodibility small molecules to pass through them, will as the labyrinth, to pass through the road of long complications, thereby anticorrosion ability is improved.
Embodiment
The below will be clearly and completely described the technical scheme in the embodiment of the invention, and obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The present invention is by adding glass flake and zinc powder in the PE base, make the barriering effect that distributing in the PE powder good glass coating and zinc layer, glass coating has the characteristic of acid-and base-resisting, salt, water, and lepidiod sheet glass is in the PE layer, can form layer by layer and intercept, and the corrodibility small molecules to pass through them, will as the labyrinth, to pass through the road of long complications, thereby anticorrosion ability is improved.
Zinc powder is the spherical or zinc flake of 40-3000 purpose, and the addition in powder coating is preferably the 5-30% of polyethylene quality, and preferred addition is the 7-20% of polyethylene quality.The zinc layer has the sacrificing cathode that has precedence over iron and acid, alkali, water reaction and protects the characteristics of anode, and the reaction product of zinc is weak acid or basic salt, and it has understood the characteristic of filling, fine and close PE layer in PE.Thereby stop that external corrodibility small molecules is to the corrosion of base material.Glass flake is 40 orders-3000 purpose foliated glass scale.The material of glass scale is alkali glass or neutral glass, and the addition in powder coating is preferably the 5-30% of polyethylene quality.Preferred addition is the 7-20% of polyethylene quality.Glass flake mainly by stopping layer by layer, increases preservative property, and zinc metal sheet then increases anticorrosion ability by stopping layer by layer and absorbing and react the corrosion small molecules and form packing material.The blending dispersion mechanism that the present invention passes through is dispersed in the PE powdered material glass flake and zinc powder.
As further improvement, also comprise lubricant in the powder coating, the addition in powder coating is preferably the 0.1-1% of polyethylene quality.Lubricant can be selected from polymer-wax, amine hydroxybenzene or erucicamide.Can also comprise compatilizer, the addition in powder is preferably 5%-10%.Compatilizer can be maleic anhydride grafts, vinylformic acid or 2-hydroxy-butanedioic acid.
Because ocean environment is fierce general sunshine, PE powder coating layer is under this environment, and is strict to weathering resistance.In order further to improve the work-ing life of powder coating of the present invention, in powder coating, can add anti-aging auxiliary agent, such as auxiliary agents such as oxidation inhibitor, photostabilizers, guarantor's coating life under ocean environment is long, and then accomplishes an application, 10 years characteristics without pipe.Wherein the addition of anti-aging auxiliary agent in powder coating is 0.1-1%.
Embodiment 1
Ocean anti-corrosive powder paint 1, the prescription of this coating comprise, medium-density polyethylene (MDPE), glass flake and spherical zinc powder.Wherein MDPE is 100 kilograms, 5 kilograms of glass flakes, 30 kilograms of spherical zinc powders.
The preparation of above-mentioned raw materials:
Medium-density polyethylene (MDPE), glass flake and the spherical zinc powder of above-mentioned prescription is even in stirrer for mixing, time 5min, then be placed on granulation in the screw extrusion press, temperature is 190-230 ℃, rotating speed is 300-500r/min, obtain plastic pellet, then with these particles abrasive dust in pulverizing mill, and get final product.
Embodiment 2
Ocean anti-corrosive powder paint 2, the prescription of this coating comprise, high density polyethylene(HDPE) (HDPE), foliated glass, zinc flake and lubricant.Wherein HDPE is 100 kilograms, 20 kilograms of sheet neutral glasses, 5 kilograms of zinc flakes, 0.1 kilogram of lubricant.
The preparation of above-mentioned raw materials:
HDPE, foliated glass, zinc flake and the lubricant of above-mentioned prescription is even in stirrer for mixing, time 10min, then be placed on granulation in the screw extrusion press, temperature is 190-230 ℃, rotating speed is 300-500r/min, obtain plastic pellet, then with these particles abrasive dust in pulverizing mill, and get final product.
Embodiment 3
Ocean anti-corrosive powder paint 3, the prescription of this coating comprise, Low Density Polyethylene (LDPE), high density polyethylene(HDPE) (HDPE), foliated glass, zinc flake and lubricant.Wherein LDPE is 50 kilograms, 50 kilograms of HDPE, 30 kilograms of sheet neutral glasses, 20 kilograms of zinc flakes, 1 kilogram of lubricant.
The preparation of above-mentioned raw materials:
LDPE, HDPE, sheet neutral glass, zinc flake and the lubricant of above-mentioned prescription is even in stirrer for mixing, time 10min, then be placed on granulation in the screw extrusion press, temperature is 190-230 ℃, rotating speed is 300-500r/min, obtain plastic pellet, then with these particles abrasive dust in pulverizing mill, and get final product.
Embodiment 4
Ocean anti-corrosive powder paint 4, the prescription of this coating comprise, Low Density Polyethylene (LDPE), high density polyethylene(HDPE) (HDPE), foliated glass, zinc flake and lubricant.Wherein LDPE is 30 kilograms, 70 kilograms of HDPE, 7 kilograms of sheet alkali glasses, 20 kilograms of zinc flakes, 1 kilogram of lubricant.
Preparation is same with embodiment 3.
Embodiment 5
Ocean anti-corrosive powder paint 5, the prescription of this coating comprise, MDPE, high density polyethylene(HDPE) (HDPE), foliated glass, zinc flake, lubricant and oxidation inhibitor.Wherein MDPE is 100 kilograms, 7 kilograms of sheet alkali glasses, 7 kilograms of zinc flakes, 0.5 kilogram of lubricant, 0.5 kilogram in oxidation inhibitor.
Preparation is same with embodiment 3.
Embodiment 6
Ocean anti-corrosive powder paint 6, the prescription of this coating comprise, LLDPE(trade mark JL-210) 100 kilograms, 5 kilograms of zinc flakes, 10 kilograms in foliated glass powder, 0.1 kilogram in oxidation inhibitor, UV light absorber 0.1,0.5 kilogram of titanium dioxide, 0.2 kilogram in oleic acid amine wax is placed on them in the homogenizer and stirred 5 minutes, then be placed on granulation in the screw extrusion press, obtain plastic pellet, then these particles are placed on abrasive dust in the pulverizing mill, this powder is for subsequent use.
The workpiece test piece is heated to 300, this powder is soaked plastic coating by fluidized-bed, soak powder 4-10 second, levelling then, the properties of this application print of last test.
Test result shows, this coating has heavy antiseptic property, is suitable for use in ocean environment.
Embodiment 7
Ocean anti-corrosive powder paint 7, the prescription of this coating comprises, LDPE(trade mark 1C7A and 868-000(1:1)) 100 kilograms, 5 kilograms of zinc flakes, 10 kilograms in foliated glass powder, 0.1 kilogram in oxidation inhibitor, UV light absorber 0.1,0.5 kilogram of titanium dioxide, 0.2 kilogram of erucicamide, 10 kilograms of maleic anhydride grafts, they are placed in the homogenizer stirred 5 minutes, then be placed on granulation in the screw extrusion press, obtain plastic pellet, then these particles are placed on abrasive dust in the pulverizing mill, this powder is for subsequent use.
The workpiece test piece is heated to 300, this powder is soaked plastic coating by fluidized-bed, soak powder 4-10 second, levelling then, the properties of this application print of last test.
Test result shows, this coating has heavy antiseptic property, is suitable for use in ocean environment.
Embodiment 8
Ocean anti-corrosive powder paint 8, the prescription of this coating comprise, LDPE(trade mark 1C7A and 868-000(1:1)) 100 kilograms, 10 kilograms of zinc flakes, 8 kilograms in foliated glass powder, 0.1 kilogram in oxidation inhibitor, UV light absorber 0.1,0.5 kilogram of titanium dioxide, 0.2 kilogram in oleic acid amine wax, 5 kilograms in vinylformic acid, they are placed in the homogenizer stirred 5 minutes, then be placed on granulation in the screw extrusion press, obtain plastic pellet, then these particles are placed on abrasive dust in the pulverizing mill, this powder is for subsequent use.
The workpiece test piece is heated to 300, this powder is soaked plastic coating by fluidized-bed, soak powder 4-10 second, levelling then, the properties of this application print of last test.
Test result shows, this coating has heavy antiseptic property, is suitable for use in ocean environment.
Embodiment 9
Ocean anti-corrosive powder paint 9, the prescription of this coating comprise, LDPE(trade mark JL-210) 100 kilograms, 8 kilograms of zinc flakes, 7 kilograms in foliated glass powder, 0.1 kilogram in oxidation inhibitor, UV light absorber 0.1,0.5 kilogram in zinc oxide, 0.2 kilogram in oleic acid amine wax, 5 kilograms of 2-hydroxy-butanedioic acids, they are placed in the homogenizer stirred 5 minutes, then be placed on granulation in the screw extrusion press, obtain plastic pellet, then these particles are placed on abrasive dust in the pulverizing mill, this powder is for subsequent use.
The workpiece test piece is heated to 300, this powder is soaked plastic coating by fluidized-bed, soak powder 4-10 second, levelling then, the properties of this application print of last test.
Test result shows, this coating has heavy antiseptic property, is suitable for use in ocean environment.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. ocean anti-corrosive powder paint, the prescription of this coating comprises, polyethylene, glass flake and zinc powder.
2. a kind of ocean according to claim 1 anti-corrosive powder paint is characterized in that, described polyethylene is one or more the combination in low density polyethylene, medium-density polyethylene MDPE, the high density polyethylene.
3. a kind of ocean according to claim 1 anti-corrosive powder paint is characterized in that, described glass flake is 40 orders-3000 purpose foliated glass scale; The material of described glass flake is alkali glass or neutral glass.
4. the described a kind of ocean of arbitrary claim anti-corrosive powder paint is characterized in that according to claim 1-3, and the addition of described glass flake in powder coating is the 5-30% of polyethylene quality; The addition of described glass flake in powder coating is the 7-20% of polyethylene quality.
5. the described a kind of ocean of arbitrary claim anti-corrosive powder paint is characterized in that according to claim 1-3, and described zinc powder is the spherical or zinc flake of 40-3000 purpose; The addition of described zinc powder in powder coating is the 5-30% of polyethylene quality; The addition of described zinc powder in powder is the 7-20% of polyethylene quality.
6. the described a kind of ocean of arbitrary claim anti-corrosive powder paint is characterized in that according to claim 1-3, also comprises lubricant in the described powder coating; The addition of described lubricant in powder coating is the 0.1-1% of polyethylene quality; Also comprise compatilizer in the described powder coating; Addition in powder is 5%-10%;Compatilizer can be maleic anhydride grafts, vinylformic acid or 2-hydroxy-butanedioic acid.
7. a kind of ocean according to claim 6 anti-corrosive powder paint is characterized in that, described lubricant is polymer-wax, amine hydroxybenzene or erucicamide; Described polymer-wax is polyethylene wax or Poly Propylene Wax.
8. the described a kind of ocean of arbitrary claim anti-corrosive powder paint is characterized in that according to claim 1-3, also comprises anti-aging auxiliary agent in the described powder coating; The addition of described anti-aging auxiliary agent in powder coating is the 0.1-1% of polyethylene quality; Described anti-aging auxiliary agent is oxidation inhibitor and photostabilizer; Described photostabilizer is one or more the combination in UV light absorber, titanium dioxide, carbon black, the zinc oxide.
9. the preparation method of an ocean anti-corrosive powder paint comprises:
Hybrid right requires the material in the described prescription of the arbitrary claim of 1-8;
The mixed described material of Screw Extrusion granulation;
Described material behind the grinding extruding pelletization, and get final product.
10. the preparation method of a kind of ocean according to claim 9 anti-corrosive powder paint is characterized in that, the processing condition of described Screw Extrusion granulation are, temperature 190-230 ℃, and rotating speed 300-500r/min.
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Application publication date: 20130410 |