CN102766388A - Heavy-duty coating for prolonging life of sheet metals and preparation method thereof - Google Patents
Heavy-duty coating for prolonging life of sheet metals and preparation method thereof Download PDFInfo
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- CN102766388A CN102766388A CN2012102772248A CN201210277224A CN102766388A CN 102766388 A CN102766388 A CN 102766388A CN 2012102772248 A CN2012102772248 A CN 2012102772248A CN 201210277224 A CN201210277224 A CN 201210277224A CN 102766388 A CN102766388 A CN 102766388A
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Abstract
The invention relates to a heavy-duty coating for prolonging life of sheet metals and a preparation method of the heavy-duty coating. The heavy-duty coating is obtained by mixing an epoxy component and a curing component according to the weight ratio of 4:1, wherein the raw materials of the epoxy component comprise resin, additive resin, an anti-rust material, a solvent and an auxiliary agent; and the raw materials of the curing component comprise an amine adduct, a curing auxiliary agent and a solvent. Compared with the prior art, the product obtained by the preparation method has the excellent performances as follows: the hardness is not less than 2H, the adhesion is 0-1 level, the corrosion resistance is improved by 7-10 times in comparison with the traditional surface treatment, and the heavy-duty coating can resist salt spray test for 1000h or more.
Description
Technical field
The present invention relates to a kind of heavy-duty coating and preparation method thereof, especially relate to a kind of heavy-duty coating that prolongs the sheet metal life-span and preparation method thereof.
Background technology
Most sheet metal needs anticorrosion with painting coating to increase the service life, and particularly some special industries need and can in harsh relatively corrosive environment, use, and have one type of heavy-duty coating that can reach than the conventional longer protection period of protective system.
In automobile industry; Growth along with vehicle working life and enforcement mileage; The corrosion of each position parts aggravates gradually, and the position of common serious corrosion is the sheet metal component part, like wheel house, the big case of car, passenger vehicle housing, car bottom plate, splash pan, headstock (beater or beat-up, face shield) etc.These positions often contact with silt, rubble and water, like the splash protective layer of rubble, silt bump car surface of wheel, very easily scratch enamelled coating; Destroy its integrity, continuity; Make exposed metal/bare metal outside, the oxygen in touching water and air will chemically react and produces corrosion.The corrosion of vehicle metal body and part not only can reduce its quality and life-span, and because of the unusual part that damages of its corrosion very easily causes traffic hazard, even cause the tragedy of car crash.The spraying heavy-duty coating is to play metallic element to avoid or reduce being corroded, thereby reaches the effect that increases the service life, and the main performance of heavy-duty coating is to rely on the long and short of salt-fog resistant time to judge.
Present existing heavy-duty coating coating all is in order on the domestic and international market requirement of general automobile protective system constantly to be upgraded, and is >=168 hours according to the salt spray resistance standard of national standard priming paint.Each automobile factory according to different requirement salt spray resistance index rise to >=240H or 500H with on improve the antiseptic and rustproof performance of priming paint, but up to the present both at home and abroad paint all do not reach this standard.Traditional priming paint does not influence at 35-50UM at its paint film that salt spray resistance reaches 200 hours neutral salt spray at most under the situation of over-all properties of paint, and salt spray resistance surpasses and then can not reach basically more than 240 hours.Therefore, restricted the development of protective system industry greatly.
Summary of the invention
The object of the invention is exactly to provide a kind of salt-fog test can reach protective system more than 1000 hours and preparation method thereof for the defective that overcomes above-mentioned prior art existence.
The object of the invention can be realized through following technical scheme:
A kind of heavy-duty coating that prolongs the sheet metal life-span, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.
Described epoxy component comprises following component and weight part content:
Resin 18～42;
Additive resin 4～15;
Antirust material 28～45;
Solvent 15～35;
Auxiliary agent 4～12.
Preferred following component of described epoxy component and weight part content: resin 20～40, additive resin 5～10, antirust material 30～40, solvent 20～30, auxiliary agent 5～10.
Described resin is selected from one or more in aminoresin, epoxy resin, Synolac, Vinylite, saturated polyester resin or the urethane resin.
Described additive resin is selected from one or more in acrylic modified epoxy resin, vinyl resin, epoxy resin, chlorinated polypropylene or the Vinylite.
Described antirust material is selected from one or both in red iron oxide, tertiary iron phosphate, zinc oxide, aluminium triphosphate or the iron mica.
Described solvent is selected from one or both in MIBK, butanone, PMA, the propyl carbinol.
Described curing component comprises following component and weight part content:
Amine affixture 40～70;
Auxiliary curing agent 15～45;
Solvent 5～25.
Preferred following component of described curing component and weight part content: amine affixture 45～60, auxiliary curing agent 20～40, solvent 10～20.
Described solvent is selected from one or both in MIBK, butanone, PMA or the propyl carbinol.
Described amine affixture is selected from one or both in aliphatic amide affixture, polymeric amide, n n dimetylaniline affixture or the tetramethylenediamine affixture.
Described auxiliary curing agent is selected from one or both among commercially available TMP-30, tertiary amine, commercially available K54 or the commercially available TR-30.
Preparation prolongs the method for the heavy-duty coating in sheet metal life-span, and this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 30～60 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to theoretical value;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjustment viscosity is extremely qualified, weighing and bagging;
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat to stop to stir behind the above-mentioned material dissolution, detect the solid content amount, and be adjusted to theoretical value, weighing and bagging;
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
In the preparation of described epoxy component, the theoretical value of solids content is for being not less than 60wt%, and fineness is≤30 μ m, and viscosity is>=100 seconds/25 ℃--be coated with 4 glasss.
In the preparation of described curing component, the theoretical value of solids content is for being not less than 40wt%.
Compared with prior art, the present invention react condition of cure be >=5 ℃, excellent product performance: hardness >=2H, 0～1 grade of sticking power has the following advantages:
(1) molecular structure of the used resin of this paint itself is given its excellent adhesion property, and it is good to have snappiness, characteristics such as hardness height;
(2) volumetric shrinkage low (only about 2%) during this paint curing, internal stress is little like this, and does not lose sticking power, and its paint film all has good sticking power to metal (steel, aluminium etc.), pottery, glass, concrete, timber isopolarity ground;
(3) it is good that this paint has the chemical resistance performance, is tridimensional network behind the film curing, and compactness is strong.Can be widely used in protection against corrosion priming paint, rust-proofing primer;
(4) traditional protective system eroded 1um in general 10 hours during salt-fog test in 5% salt solution test, 200 hours eating throwns of iridescent passivation film that 3um is thick, and salt-fog test reaches 168 hours.This kind protective system is not outer transforming agent or the stablizer of adding; But sex change compound resin; Produce physics-chemical reaction with metal base and iron rust, with resin, filler, stable rusty scale conversion product and the one's share of expenses for a joint undertaking of metal base, huge legendary turtle is closed and forms strong composite shielding layer.This screen layer not only effectively oxidative ionic spread to metal base, and, as long as resin coating exists, can also the rust spot of new oxidation and rusting be transformed again and fixing, corrode passage again thereby thoroughly stopped up.Therefore, when under equal environment, doing salt-fog test, just eroded 1um in 100 hours, handle erosion resistance than conventional surface and improve seven to ten times, salt-fog test can reach more than 1000 hours;
(5) this paint and solidifying agent are moderate;
(6) this paint and solidifying agent belong to environment-friendly type;
(7) this paint and solidifying agent belong to the general purpose grade product.
Embodiment
Below in conjunction with specific embodiment the present invention is elaborated.
Embodiment 1
A kind of heavy-duty coating preparation method who prolongs the sheet metal life-span, this method comprises following process step:
The preparation of a, epoxy component:
(1), promptly in 15 kilograms of MIBKs, 20 kilograms of input reaction kettles of propyl carbinol, and is heated to about 45 ℃ and stirs earlier with whole solvents;
(2) keep stirring and 40 kilograms in aminoresin, ethenoid resin being dropped in the reaction kettle for 5 kilograms successively, stirred about 1 hour;
(3) to be mixedly slowly drop in the reaction kettle acrylic modified epoxy resin for 10 kilograms after evenly;
(4) after all solids dissolving and mixing, shut down slaking more than 12 hours;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) first by the prescription requirement with in 20 kilograms of input reaction kettles of whole solvents;
(2) keep stirring and 70 kilograms of amine affixtures, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 0.5 hour for 10 kilograms successively;
(3) stop after waiting to dissolve stirring, detect solid content, and be adjusted to and be not less than 40wt%, weighing and bagging.
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Embodiment 2
A kind of preparation method who prolongs the heavy-duty coating in sheet metal life-span, this method comprises following process step:
The preparation of a, epoxy component:
(1), promptly in 15 kilograms of MIBKs, 15 kilograms of input reaction kettles of propyl carbinol, and is heated to about 45 ℃ and stirs earlier with whole solvents;
(2) keep stirring and 20 kilograms of epoxy resin, ethenoid resin being dropped in the reaction kettle for 10 kilograms successively, stirred about 1 hour;
(3) to be mixedly slowly drop in the reaction kettle acrylic modified epoxy resin for 5 kilograms after evenly;
(4) after all solids dissolving and mixing, shut down slaking more than 12 hours;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) first by the prescription requirement with in 30 kilograms of input reaction kettles of whole solvents;
(2) keep stirring and 40 kilograms of amine affixtures, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 2.5 hours for 30 kilograms successively;
(3) stop after waiting to dissolve stirring, detect solid content, and be adjusted to and be not less than 40wt%, weighing and bagging.
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Embodiment 3
A kind of heavy-duty coating that prolongs the sheet metal life-span, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.Wherein, Epoxy component comprises following component and content: resin 18kg, additive resin 4kg, antirust material 28kg, solvent 15kg, auxiliary agent 4kg, and resin is selected aminoresin for use, and additive resin is selected acrylic modified epoxy resin for use; Antirust material is selected red iron oxide for use, and solvent is selected MIBK for use.Curing component comprises following component and content: amine affixture 40kg, auxiliary curing agent 15kg, solvent 5kg, and solvent is selected MIBK for use, and the amine affixture is selected polymeric amide for use, and auxiliary curing agent is selected commercially available TMP-30 for use.
Preparation prolongs the method for the heavy-duty coating in sheet metal life-span, and this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 30 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 2.5h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 1h successively;
(3) stop after waiting to dissolve stirring, detect solid content, and be adjusted to and be not less than 40wt%, weighing and bagging.
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Embodiment 4
A kind of heavy-duty coating that prolongs the sheet metal life-span, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.Wherein, Epoxy component comprises following component and content: resin 20kg, additive resin 5kg, antirust material 30kg, solvent 20kg, auxiliary agent 5kg, and resin is selected Vinylite for use, and additive resin is selected vinyl resin for use; Antirust material is selected red iron oxide and tertiary iron phosphate for use, and solvent is selected butanone for use.Curing component comprises following component and content: amine affixture 45kg, auxiliary curing agent 20kg, solvent 10kg, and solvent is selected butanone for use, and the amine affixture is selected the n n dimetylaniline affixture for use, and auxiliary curing agent is selected commercially available K54 for use.
Preparation prolongs the method for the heavy-duty coating in sheet metal life-span, and this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 40 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 2h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 1.5h successively;
(3) treat to stop behind the above-mentioned material dissolution stirring, detect the solid content amount, and be adjusted to and be not less than 40wt%, weighing and bagging;
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Embodiment 5
A kind of heavy-duty coating that prolongs the sheet metal life-span, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.Wherein, Epoxy component comprises following component and content: resin 40kg, additive resin 10kg, antirust material 40kg, solvent 30kg, auxiliary agent 10kg, and resin is selected Synolac for use, and additive resin is selected epoxy resin for use; Antirust material is selected zinc oxide for use, and solvent is selected butanone for use.Curing component comprises following component and content: amine affixture 60kg, auxiliary curing agent 40kg, solvent 20kg, and solvent is selected butanone for use, and the amine affixture is selected n n dimetylaniline affixture and tetramethylenediamine affixture for use, and auxiliary curing agent is selected commercially available K54 for use.
Preparation prolongs the method for the heavy-duty coating in sheet metal life-span, and this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 50 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 1h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat to stop behind the above-mentioned material dissolution stirring, detect the solid content amount, and be adjusted to and be not less than 40wt%, weighing and bagging;
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Embodiment 6
A kind of heavy-duty coating that prolongs the sheet metal life-span, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.Wherein, Epoxy component comprises following component and content: resin 42kg, additive resin 15kg, antirust material 45kg, solvent 35kg, auxiliary agent 12kg; Resin is selected saturated polyester resin and urethane resin for use; Additive resin is selected epoxy resin for use, and antirust material is selected aluminium triphosphate for use, and solvent is selected propyl carbinol for use.Curing component comprises following component and content: amine affixture 70kg, auxiliary curing agent 45kg, solvent 25kg, and solvent is selected propyl carbinol for use, and the amine affixture is selected the aliphatic amide affixture for use, and auxiliary curing agent is selected commercially available K54 for use.
Preparation prolongs the method for the heavy-duty coating in sheet metal life-span, and this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 30～60 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to and be not less than 60wt%;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjust viscosity to >=100 seconds/25 ℃ with butanone and PMA--be coated with 4 glasss, weighing and bagging.
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat to stop behind the above-mentioned material dissolution stirring, detect the solid content amount, and be adjusted to and be not less than 40wt%, weighing and bagging;
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
Claims (10)
1. a heavy-duty coating that prolongs the sheet metal life-span is characterized in that, this protective system by epoxy component and curing component by weight being to mix at 4: 1 to obtain.
2. a kind of heavy-duty coating that prolongs the sheet metal life-span according to claim 1 is characterized in that, described epoxy component comprises following component and weight part content:
Resin 18～42;
Additive resin 4～15;
Antirust material 28～45;
Solvent 15～35;
Auxiliary agent 4～12.
3. a kind of heavy-duty coating that prolongs the sheet metal life-span according to claim 2 is characterized in that, preferred following component of described epoxy component and weight part content: resin 20～40; Additive resin 5～10; Antirust material 30～40, solvent 20～30, auxiliary agent 5～10.
4. according to claim 2 or 3 described a kind of heavy-duty coatings that prolong the sheet metal life-span; It is characterized in that described resin is selected from one or more in aminoresin, epoxy resin, Synolac, Vinylite, saturated polyester resin or the urethane resin; Described additive resin is selected from one or more in acrylic modified epoxy resin, vinyl resin, epoxy resin, chlorinated polypropylene or the Vinylite; Described antirust material is selected from one or both in red iron oxide, tertiary iron phosphate, zinc oxide, aluminium triphosphate or the iron mica; Described solvent is selected from one or both in MIBK, butanone, PMA, the propyl carbinol.
5. a kind of heavy-duty coating that prolongs the sheet metal life-span according to claim 1 is characterized in that, described curing component comprises following component and weight part content:
Amine affixture 40～70;
Auxiliary curing agent 15～45;
Solvent 5～25.
6. a kind of heavy-duty coating that prolongs the sheet metal life-span according to claim 5 is characterized in that, preferred following component of described curing component and weight part content: amine affixture 45～60, auxiliary curing agent 20～40, solvent 10～20.
7. according to claim 5 or 6 described a kind of heavy-duty coatings that prolong the sheet metal life-span, it is characterized in that described solvent is selected from one or both in MIBK, butanone, PMA or the propyl carbinol; Described amine affixture is selected from one or both in aliphatic amide affixture, polymeric amide, n n dimetylaniline affixture or the tetramethylenediamine affixture; Described auxiliary curing agent is selected from one or both among commercially available TMP-30, tertiary amine, commercially available K54 or the commercially available TR-30.
8. prepare the method for the protective system of high salt spray resistance as claimed in claim 1, it is characterized in that, this method may further comprise the steps:
The preparation of a, epoxy component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement, be heated to 30～60 ℃ and stir;
(2) keep stirring and epoxy resin being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat slowly to drop into additive resin in the reaction kettle after the epoxy resin dissolving;
(4) after all solids dissolving and mixing, it is subsequent use to lower the temperature;
(5) measure solid content, and be adjusted to theoretical value;
(6) drop into antirust material and auxiliary agent, grind after stirring;
(7) to the qualified back discharging of fineness, adjustment viscosity is extremely qualified, weighing and bagging;
The preparation of b, curing component:
(1) earlier whole solvents is dropped in the reaction kettle by the prescription requirement;
(2) keep stirring and amine affixture, auxiliary curing agent being dropped in the reaction kettle stirring and dissolving 0.5～2.5h successively;
(3) treat to stop to stir behind the above-mentioned material dissolution, detect the solid content amount, and be adjusted to theoretical value, weighing and bagging;
The preparation of c, protective system:
The epoxy component for preparing and curing component by weight being to mix at 4: 1, are prepared the protective system of high salt spray resistance.
9. the method for the protective system of the high salt spray resistance of preparation according to claim 8 is characterized in that, in the preparation of described epoxy component, the theoretical value of solids content is for being not less than 60wt%, and fineness is≤30 μ m, and viscosity is>=100 seconds/25 ℃--be coated with 4 glasss.
10. the method for the protective system of the high salt spray resistance of preparation according to claim 8 is characterized in that, in the preparation of described curing component, the theoretical value of solids content is for being not less than 40wt%.
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