Coating composition and steel composite material

A composition and coating technology, which is applied in the field of steel composite materials, can solve problems affecting appearance quality, etc., and achieve the effect of improving appearance quality, service life and environmental friendliness

Inactive Publication Date: 2010-11-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the rail is in the process of storage, waiting for transportation and transportation, short-term anti-corrosion is required to prevent the corrosion of the rail during the process and affect the appearance quality and service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The above-mentioned preparation method of the coating composition of the present invention can adopt various methods to obtain, and preferably, according to the content scope of above-mentioned each component, first the maleic anhydride modified rosin and the water-soluble alkaline substance in the solvent The solution is mixed, then the film-forming substance is added and stirred evenly. In this method, the water-soluble basic substance can be dissolved in all solvents to obtain a solution of the water-soluble basic substance in the solvent; it is also possible to first dissolve the water-soluble basic substance in a part of the solvent to obtain the water-soluble basic substance in the solvent. solution in solvent, then add the remaining amount of solvent at the end.

[0016] The steel composite material provided by the invention includes a base material and an anti-corrosion coating attached to the surface of the base material, and the anti-corrosion coating is a pro...

Embodiment 1

[0026] 1. Preparation of coating composition

[0027] Add 100g of rosin and 30g of maleic anhydride to a 1.5-liter container, and add 5g of catalyst ZnO, under stirring, heat to 120°C and keep for 2 hours, until the solution is uniform and stable, and maleic anhydride modified Rosin resin (acid value: 250 mgKOH / g, softening point: 195° C.) 130 g.

[0028] Getting concentration is that 8.4ml of ammoniacal liquor 8.4ml of 10% by weight is mixed with the above-mentioned maleic anhydride modified rosin resin obtained, then add acrylate-2-hydroxyethyl ester polymer (weight average molecular weight is 5000) 50ml, stir evenly, make The pH value of the mixed liquid is 9; then add 50ml of styrene-acrylic emulsion (molecular weight: 200000), stir at a speed of 1300r / min for 20 minutes until the mixed liquid is uniform, and finally add distilled water until the volume of the mixed liquid is 1L, stir with 0.5 g defoamer (SD-236 water-based defoamer) defoaming.

[0029] A coating composi...

Embodiment 2

[0033] 1. Preparation of coating composition

[0034] Add 150g rosin and 20g maleic anhydride to a 1.5-liter container, and add 10g of catalyst ZnO, under stirring, heat to 120°C and keep it for 2 hours, until the solution is uniform and stable, and maleic anhydride modified Rosin resin (acid value: 350 mgKOH / g, softening point: 180° C.) 170 g.

[0035] Getting concentration is that 18.8ml of ammoniacal liquor 10% by weight is mixed with the maleic anhydride modified rosin resin obtained above, then adds silicon acrylic emulsion (weight average molecular weight is 200000) 160ml, stirs 20 minutes under the rotating speed of 1300r / min to The mixed liquid is uniform, so that the pH value of the mixed liquid is 11; finally, add distilled water until the volume of the mixed liquid is 1 L, stir well and then use 1.0 g of defoamer (SD-236 water-based defoamer) to defoam.

[0036] A coating composition with a solids content of 45% by weight was obtained.

[0037] 2. Preparation of s...

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Abstract

The invention provides a coating composition, which comprises maleic anhydride modified abietic resin, a water-soluble alkaline substance, a film-forming substance and a solvent. The solid content of the composition is 30 to 45 weight percent, and the pH value is 7 to 11. The invention also provides a steel composite material, which comprises a base material and an anticorrosive coating which is attached to the surface of the base material. The anticorrosive coating is a product which is cured by the provided coating composition. The coating composition can provide short-term anticorrosion for steel, in particular steel rails. Therefore, the coating composition can improve the appearance quality and service life of the steel. The coating composition does not contain Pb, Cd, Hg, Cr6+, polybrominated diphenyl ethers (PBDE) and polybrominated biphenyls (PBB) regulated in a RoHS instruction, and is environment-friendly.

Description

technical field [0001] The invention relates to a coating composition, and also relates to a steel composite material, which includes an anti-corrosion coating formed by curing the coating composition. Background technique [0002] During the production, storage and transportation of steel products such as steel rails by steel companies, steel products are easily corroded by electrochemical reactions with corrosive media in the external environment. Especially when the rail is waiting for a ship in the port, shipped out and transported at sea, the corrosion medium Cl in the rail and seawater - 、Na + , Mg 2+ and H 2 O oxidation-reduction reaction occurs, causing serious red rust on the surface of the rail, which affects the appearance quality and service life of the rail product. [0003] In addition to the need for long-term anti-corrosion of steel rails in special environments that are prone to corrosion (such as in dark and humid tunnels), they do not need anti-corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D193/04C09D133/04C09D125/14C09D7/12C09D5/08C23C22/62C23C22/68
Inventor 许哲峰李大东徐权余腾义张爱萍李国安
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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