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Zinc phosphate slurry used in aqueous anticorrosion priming paints, and its preparation method

An anti-corrosion primer and zinc phosphate technology, applied in the field of coatings, can solve the problems affecting the decoration and aesthetics of the coating film, and achieve the effect of solving pinhole defects and avoiding adsorption

Active Publication Date: 2013-01-02
V ABC PAINTS MFG JIANGXI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When the existing water-based anti-corrosion primer is matched with a decorative water-based topcoat, pinholes often appear, but there are no pinholes when it is matched with a solvent-based topcoat. This is because zinc phosphate is easy to absorb inside the topcoat. The water molecules are released during the drying process, and small pinholes are formed on the surface, which affects the decoration and aesthetics of the coating film. The reason is that although zinc phosphate does not dehydrate and hydrate at room temperature, However, zinc phosphate has strong hydrogen bonding, so it is easy to absorb water molecules in water-based coatings.

Method used

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  • Zinc phosphate slurry used in aqueous anticorrosion priming paints, and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Zinc phosphate 80.0wt%; Dipropylene glycol methyl ether, 10.0wt%; Bis(dilauryl phosphite)tetraoctyloxytitanium, 3.0%; Bentonite 0.5%; Ammonium salt of polyacrylate copolymer, 6.0%; Polyether modified silicone 0.5wt%.

[0019] Add accurately measured co-solvent and bentonite into the slurry mixing container, and use an adjustable high-speed disperser to stir for 30-60 minutes at a speed of 400-600 rpm; Step 2: Add the formulated amount of zinc phosphate and stir for 10-30 minutes minutes, the speed is 600-800 rpm; step 3: add surface treatment agent, stir for 30-60 minutes, the speed is 600-800 rpm; step 4: add dispersant, defoamer, stir for 10-30 minutes , the rotation speed is 800-1200 rpm; step 5: use a sand mill or a three-roll mill to grind the above-mentioned mixed materials to a fineness of less than 30 μm. Step 6: Filter with 100 mesh copper mesh or nylon mesh.

[0020]

Embodiment 2

[0022] Zinc phosphate 75.0wt%; dipropylene glycol methyl ether, 16.0wt%; isopropoxy tris(dioctyl pyrophosphate)titanium, 2.5%; bentonite 1.0%; ammonium salt of polyacrylate copolymer, 5.0%; Ether modified silicone, 0.5wt%.

[0023] Add accurately measured co-solvent and bentonite into the slurry mixing container, and use an adjustable high-speed disperser to stir for 30-60 minutes at a speed of 400-600 rpm; Step 2: Add the formulated amount of zinc phosphate and stir for 10-30 minutes minutes, the speed is 600-800 rpm; step 3: add surface treatment agent, stir for 30-60 minutes, the speed is 600-800 rpm; step 4: add dispersant, defoamer, stir for 10-30 minutes , the rotation speed is 800-1200 rpm; step 5: use a sand mill or a three-roll mill to grind the above-mentioned mixed materials to a fineness of less than 30 μm. Step 6: Filter with 100 mesh copper mesh or nylon mesh.

[0024]

Embodiment 3

[0026] Zinc phosphate 70.0wt%; dipropylene glycol methyl ether, 20.0wt%; alkoxyethylcarboxybis(dioctyl pyrophosphate)titanium, 2.0%; bentonite 2.0%; sodium salt of nonionic polyacrylate copolymer, 5.5 %; polyether modified silicone, 0.5wt%.

[0027] Add accurately measured co-solvent and bentonite into the slurry mixing container, and use an adjustable high-speed disperser to stir for 30-60 minutes at a speed of 400-600 rpm; Step 2: Add the formulated amount of zinc phosphate and stir for 10-30 minutes minutes, the speed is 600-800 rpm; step 3: add surface treatment agent, stir for 30-60 minutes, the speed is 600-800 rpm; step 4: add dispersant, defoamer, stir for 10-30 minutes , the rotation speed is 800-1200 rpm; step 5: use a sand mill or a three-roll mill to grind the above materials to a fineness of less than 30 μm. Step 6: Filter with 100 mesh copper mesh or nylon mesh.

[0028] Dipropylene glycol methyl ether can be replaced by propylene glycol methyl ether and propyl...

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Abstract

The invention discloses a zinc phosphate slurry used in aqueous anticorrosion priming paints. The zinc phosphate slurry is characterized in that the zinc phosphate slurry comprises 70.0-80.0wt% of zinc phosphate, 8.0-20.0wt% of a cosolvent, and 1.0-15.0wt% of assistants, wherein the cosolvent is one of or a mixture comprising several of deionized water, dipropylene glycol methyl ether, propylene glycol methyl ether and propylene glycol; and the assistants comprise a surface treating agent, an anti-settling agent, a dispersant and an antifoaming agent. According to the invention, zinc phosphate is modified by the surface treating agent, so the adsorption of the zinc phosphate in the aqueous anticorrosion priming paint with water molecules in an aqueous finish is avoided, thereby a pin hole defect generated in the film of the finish when an aqueous anticorrosion priming paint is matched with the finish is solved, and the zinc phosphate slurry can be widely used in aqueous anticorrosion priming paints.

Description

technical field [0001] The invention relates to the paint industry, in particular to a zinc phosphate treatment method for a water-based anti-corrosion primer, which solves pinhole defects during the supporting construction of the water-based anti-corrosion paint. Background technique [0002] Social development advocates environmental protection. With the continuous improvement of environmental protection requirements, the development direction of coatings is becoming more and more clear. Water-based coatings have become an inevitable trend. The key technical points for water-based anti-corrosion coatings to fundamentally replace solvent-based anti-corrosion coatings are , Anti-corrosion performance, production line construction supporting and coating cost three aspects. [0003] The composition of the water-based anti-corrosion primer includes water-based resin, anti-rust pigment, filler, additive, co-solvent, water and other components, among which the water-based resin a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09D5/08
Inventor 叶凤英初广成杨金珠胡军郭金山初秀金郑书海孙艳春
Owner V ABC PAINTS MFG JIANGXI CO LTD