Summary of the invention
The purpose of this invention is to provide a kind of coating, the coating that this coating is made has corrosion-resistant, ageing-resistant, shock-resistant and attrition resistant effect, thereby has improved vehicle steel plate long-effective corrosion ability and economic value added, prolongs the work-ing life in compartment; The preparation method of this coating also is provided.
For solving the problems of the technologies described above, technical scheme provided by the present invention is: a kind of coating, this coating comprise that ratio of weight and number is first component and the component B of 1:5,
Described first component comprises the composition that the parts by weight proportioning is following:
Aliphatic polymeric isocyanate tripolymer 65～80
N-BUTYL ACETATE 7～15
1-Methoxy-2-propyl acetate 10～15;
Described component B comprises the composition that the parts by weight proportioning is following:
1420 type carbamide resins 15～25
1520 type carbamide resins 10～20
Poly-daybreak winter propylhomoserin ester 5～15
Tinting pigment 3～5
Fine antirust paint with phosphite 10～20
High-abrasive material 2～6
Bulky amine UV light absorber 1～2
The efficient dispersing auxiliary 1～2 of polysiloxane
N-BUTYL ACETATE 5～10.
Wherein the ratio of weight and number of 1520 type carbamide resins and 1420 type carbamide resins is 2:1.
Described fine antirust paint with phosphite is zinc phosphate and aluminum phosphate.
Described high-abrasive material is barium sulfate, silica powder or molybdenumdisulphide.
Described high-abrasive material is a molybdenumdisulphide.
A kind of method for preparing above-mentioned coating, this preparation method be with first component and component B in proportion mixing get final product; The preparation method of described first component presses parts by weight proportioning mixing separately with each composition of first component;
The preparation method of described component B is: proportionally mixing 1420 type carbamide resins, 1520 type carbamide resins and polysiloxane dispersant with high efficiency, high speed dispersion 15 minutes; In whipping process, add tinting pigment, fine antirust paint with phosphite, high-abrasive material, continue high speed dispersion more than 40 minutes; Leave standstill 24 hours fully moistening after, adopting horizontal sand mill to be ground to fineness is below 45 microns; Add bulky amine UV light absorber, poly-daybreak winter propylhomoserin ester, regulate viscosity with N-BUTYL ACETATE at last, promptly make component B.
The advantage that the present invention has: based on satisfying the new requirement that manufactures and designs theory of 70 tonnes of new exclusive fortune coal open-top cars, with the thick slurry finish paint of alkyd that adopts in the present railway freight-car application system, epoxy anticorrosion system coating corrosion-resistant, ageing-resistant, shock-resistant and wear resistance and aging after the technology status of stability, the present invention has adopted novel impregnating material---carbamide resin (1420), carbamide resin (1520), the composite use of the poly-daybreak winter propylhomoserin ester of modification, successfully developed high anticorrosion elastic wear-resisting coating, the not corrosion of paint film behind its salt spray resistance 1000h, non-foaming, do not come off; Carry out anti-artificial weathering test by the GB/T14522 method, the positive and negative impact value of paint film still reaches 100kgcm behind the aging 600h, cross cut test≤1 grade, bending property≤2mm, its ageing-resistant having good stability; Improved the protection function of corrosion protection coating, prolonged the work-ing life of vehicle, satisfy 70 tonnes of new exclusive fortune coal open-top cars new manufacture and design theory, it is a bottom surface unification coating simultaneously, simplifies construction technology, reduced energy consumption, improved production efficiency, had tangible technical advance, technology advance and standard advanced, on railway freight-car, applied, manufacturing, operation and maintenance to railway freight-car have higher comprehensive price ratio, improve the rail vehicle efficiency of operation.
Embodiment:
Embodiment 1
A kind of coating, this coating comprises first component and component B, described first component comprises the composition that the parts by weight proportioning is following:
Aliphatic polymeric isocyanate tripolymer 65
N-BUTYL ACETATE 15
1-Methoxy-2-propyl acetate 10;
The preparation of first component is exactly that above raw material stirring is evenly got final product.
Described component B comprises the composition that the parts by weight proportioning is following:
1420 type carbamide resins 25
1520 type carbamide resins 10
Poly-daybreak winter propylhomoserin ester 15
Colour carbon black 3
Zinc phosphate fine antirust 20
Molybdenumdisulphide 2
Bulky amine UV light absorber 1～2
The efficient dispersing auxiliary 1～2 of polysiloxane
N-BUTYL ACETATE 10.
Preparation technology's flow process of component B is as follows:
Proportionally mixing 1420 type carbamide resins, 1520 type carbamide resins and polysiloxane dispersant with high efficiency, high speed dispersion 15 minutes; In whipping process, add tinting pigment, fine antirust paint with phosphite, high-abrasive material, continue high speed dispersion more than 40 minutes; Leave standstill 24 hours fully moistening after, adopting horizontal sand mill to be ground to fineness is below 45 microns; Add bulky amine UV light absorber, poly-daybreak winter propylhomoserin ester, regulate viscosity with N-BUTYL ACETATE at last, promptly make component B.
In the use of coating, as long as first component and component B are pressed the parts by weight proportioning mixing of 1:5, wherein aliphatic isocyanic ester and polyaspartic acid esters react, and the aliphatics polyureas that obtains is coating.
Embodiment 2
A kind of coating is characterized in that: this coating comprises first component and component B,
Described first component comprises the composition that the parts by weight proportioning is following:
Aliphatic polymeric isocyanate tripolymer 80
N-BUTYL ACETATE 7
1-Methoxy-2-propyl acetate 15;
Described component B comprises the composition that the parts by weight proportioning is following:
1420 type carbamide resins 15
1520 type carbamide resins 20
Poly-daybreak winter propylhomoserin ester 5
Red iron oxide 5
Zinc phosphate fine antirust 10
Barium sulfate 6
Bulky amine UV light absorber 1
Polysiloxane dispersing auxiliary 2
N-BUTYL ACETATE 5.
The preparation method is with the preparation method of embodiment 1.
Embodiment 3
A kind of coating is characterized in that: this coating comprises first component and component B,
Described first component comprises the composition that the parts by weight proportioning is following:
Aliphatic polymeric isocyanate tripolymer 72
N-BUTYL ACETATE 11
1-Methoxy-2-propyl acetate 12;
Described component B comprises the composition that the parts by weight proportioning is following:
1420 type carbamide resins 24
1520 type carbamide resins 12
Poly-daybreak winter propylhomoserin ester 10
Iron oxide yellow 4
Aluminum phosphate fine antirust 15
Silica powder 4
Bulky amine UV light absorber 1.5
Polysiloxane dispersing auxiliary 1.5
N-BUTYL ACETATE 7.5.
The preparation method is with the preparation method of embodiment 1.
Simultaneous test:
The coating of above-mentioned 3 embodiment preparation is carried out correlation test, and the performance of average result and common carbamide paint, polyurethane coating is relatively shown in table 1, table 2:
The comparison of the high anticorrosion elastic wear-resisting of table 1 bottom surface unification coating and common carbamide paint
| Project | Coating of the present invention | Common polyurea materials |
| Gel time (min) | 5～120 | 1/10～1/6 |
| Appearance of film | Good leveling property, apparent smooth | Levelling property is poor, be fit to do pitted skin |
| A coating thickness (μ m) | 60～375 | ≥300 |
| The VOC discharging | Controlled, can realize zero release | Zero VOC |
| Curing speed | Adjustable | Non-adjustable |
| Construction technology | Can brush, can spray | Professional equipment |
The comparison of the high anticorrosion elastic wear-resisting of table 2 bottom surface unification coating and conventional polyurethanes coating
| Coating of the present invention | Conventional polyurethanes coating |
| Do solid work the time (d) | 1 | 7 |
| A coating thickness (μ m) | 60～375 | ≤40 |
| Non-volatile content (%) | 70～100 | 50～60 |
| The over-all properties of filming | The high comprehensive performance that single coating is filmed | Must be used the over-all properties of filming with rust-proofing primer |
| Construction technology | Technology is simple | The multilayer multiple tracks, complex process |
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.