Anhydrous phosphating agent

A technology of phosphating agent and phosphoric acid, which is applied in the field of phosphating agent, can solve the problems of endangering the health of operators, affecting the reuse of phosphating solution, and the burden of sewage treatment, etc., achieving shortened treatment time, fast film forming speed, simplified The effect of the coating process

Inactive Publication Date: 2017-02-15
广州市汇盛金丰科技企业孵化器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently commonly used phosphating solutions for manganese-based phosphorus are mainly heavy metal (such as zinc-based and manganese-based) phosphating systems and iron-based phosphating systems, which have the following problems: 1. Wastewater that pollutes the environment seriously; 2. Cost 3. It is necessary to use a strong oxidizing accelerator, which often produces toxic gases (such as NO 2 ), which endangers the health of operators and pollutes the environment; 4. There is waste residue in the phosphating solution, which affects the repeated use of phosphating solution
[0004] In the prior art, the publication number is CN 1807683A, which discloses a fast phosphating agent for metal plastic deformation at normal temperature and its preparation method. Good chemical effect, non-corrosive, and almost no waste residue discharge, but a large amount of metal salts are used in this formula, and the formula is complicated, and the burden of sewage treatment in the later stage is large, which is not conducive to industrial production
[0005] In the prior art, the publication number is CN 104294253 A, a kind of surface treatment phosphating agent for transmission shaft, which overcomes the technical defects of thin phosphating film, poor corrosion resistance and long phosphating time, but the preparation temperature of the phosphating agent is relatively high. High, 110℃~120℃, high energy consumption, which increases the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Formula: an anhydrous phosphating agent, which is composed of the following components in parts by weight: 25 parts of phosphoric acid, 5 parts of polyvinyl butyral, 5 parts of amino silicone oil, 6 parts of sodium borate, polyurethane resin 11 parts, 6 parts of citric acid, 25 parts of methanol, 20 parts of ethanol;

[0028] The method for preparing the anhydrous phosphating agent includes the following steps:

[0029] a. Preparation of a mixture of polyvinyl butyral resin and methanol

[0030] (1) Soaking: Add polyvinyl butyral in methanol according to the formula amount, stir, and soak at room temperature for 18 hours;

[0031] (2) Heating and stirring: Heat to 40°C-50°C in a mixer, stir in the mixer at 500 rpm for 2 hours, and then at 800 rpm for 1.5 hours;

[0032] (3) Add amino resin: heat and stir in a mixture of methanol and polyvinyl butyral according to the formula amount;

[0033] (4) Filtration: filter out the residue with a filter;

[0034] b. Preparation of organic s...

Embodiment 2

[0040] Formula: an anhydrous phosphating agent, which is composed of the following components in parts by weight: 30 parts of phosphoric acid, 5 parts of polyvinyl butyral, 4 parts of fluorinated silicone oil, 7 parts of sodium borate, polyurethane 12 parts of resin, 6 parts of citric acid, 20 parts of ethanol, 30 parts of dichloroethane;

[0041] The method for preparing the anhydrous phosphating agent includes the following steps:

[0042] (a. Prepare a mixture of polyvinyl butyral resin and ethanol

[0043] (1) Soaking: Add polyvinyl butyral in ethanol according to the formula amount, stir, and soak for 20 hours at room temperature;

[0044] (2) Heating and stirring: Heat to 40°C-50°C in a blender, stir in a blender at 500 rpm for 1 hour, and then at 900 rpm for 2 hours;

[0045] (3) Adding polyurethane resin: heating and stirring in the mixture of ethanol and polyvinyl butyral according to the formula amount;

[0046] (4) Filtration: filter out the residue with a filter;

[0047] b. ...

Embodiment 3

[0053] Formula: an anhydrous phosphating agent, which is composed of the following components in parts by weight: 35 parts of phosphoric acid, 9 parts of polyvinyl butyral, 7 parts of allyl silicone oil, 8 parts of sodium borate, 13 parts of epoxy resin, 8 parts of citric acid, 30 parts of butanol, 30 parts of N,N-dimethylformamide;

[0054] The method for preparing the anhydrous phosphating agent includes the following steps:

[0055] a. Preparation of a mixture of polyvinyl butyral resin and butanol

[0056] (1) Soaking: Add polyvinyl butyral to butanol according to the formula amount, stir, and soak at room temperature for 22 hours;

[0057] (2) Heating and stirring: heat to 40°C-50°C in a mixer, stir in the mixer at 500 rpm for 1.5 hours, and then at 1000 rpm for 2 hours;

[0058] (3) Add alkyd resin: heat and stir in the mixture of butanol and polyvinyl butyral according to the formula amount;

[0059] (4) Filtration: filter out the residue with a filter;

[0060] b. Prepare a mixtu...

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PUM

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Abstract

The invention discloses an anhydrous phosphating agent. The anhydrous phosphating agent is prepared from, by weight, 20 parts to 40 parts of phosphoric acid, 3 parts to 15 parts of polyvinyl butyral, 3 parts to 12 parts of silicone oil, 5 parts to 10 parts of sodium borate, 8 parts to 18 parts of resin, 3 parts to 14 parts of citric acid and 30 parts to 60 parts of organic solvents. A preparation method of the anhydrous phosphating agent includes the following steps that a, mixed liquid of polyvinyl butyral resin and the organic solvents is prepared; b, phosphoric acid and citric acid organic solvent mixed liquid is prepared; and c, mixing is performed, wherein the solutions obtained in the steps of a and b, silicone oil and sodium borate are mixed according to the formula, and the phosphating agent is prepared in a stirring manner. The phosphating agent is good in phosphating effect, small in sewage discharge amount, free of corrosivity, simple in preparation process and low in cost.

Description

Technical field [0001] The invention relates to the technical field of a phosphating agent, in particular to an anhydrous phosphating agent. Background technique [0002] Phosphating treatment is to produce a non-metallic, non-conductive, porous phosphoric acid conversion film through a chemical reaction on the cleaned metal surface under the action of the phosphating solution to facilitate the physical properties of the oil film. The process of immersing steel, aluminum or zinc workpieces in a specific acid phosphate-based phosphating solution and depositing a water-insoluble crystalline phosphate conversion film on the surface is called phosphating. There are many classifications of phosphating processes. According to the composition of the phosphating solution, it can be divided into zinc-based phosphating, zinc-calcium phosphating, iron-based phosphating, manganese-based phosphating, and composite phosphating. [0003] Phosphating solutions commonly used in manganese-based pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/03
CPCC23C22/03
Inventor 冯国文
Owner 广州市汇盛金丰科技企业孵化器有限公司
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