阅读说明：本技术 一种用于汽车刹车盘高温固化无机防腐涂料 (High-temperature curing inorganic anticorrosive paint for automobile brake disc ) 是由 许欣 孔畅 张志远 于 2019-11-06 设计创作，主要内容包括：本发明涉及防腐涂料技术领域,尤其是一种用于汽车刹车盘高温固化无机防腐涂料及其制备方法；其质量份组成如下：无机树脂40-45份、改性磷酸锌3-5份、复合铁钛粉5-6份、固化剂3-4份、水10-15份、滑石粉20-25份、分散剂0.8-2份、消泡剂0.5-0.8份、中和剂0.5-1份、膨润土0.5-1份；本发明中的用于汽车刹车盘高温固化无机防腐涂料,涂层厚度在30um的前提下,耐盐雾时间能达到1000小时,且附着力良好；选择不同种类的分散剂对漆膜耐盐雾性的影响很突出,疏水性的铵盐形成良好耐水膜,钠盐类亲水性分散剂相对分子质量低,降低了涂膜的耐水性和耐盐雾性,本发明中选择高相对分子质量特殊结构的聚羧酸铵盐作为分散剂,显著提高了涂料的防腐性。(The invention relates to the technical field of anticorrosive coatings, in particular to a high-temperature curing inorganic anticorrosive coating for an automobile brake disc and a preparation method thereof; the composition comprises the following components in parts by mass: 40-45 parts of inorganic resin, 3-5 parts of modified zinc phosphate, 5-6 parts of composite ferrotitanium powder, 3-4 parts of curing agent, 10-15 parts of water, 20-25 parts of talcum powder, 0.8-2 parts of dispersing agent, 0.5-0.8 part of defoaming agent, 0.5-1 part of neutralizing agent and 0.5-1 part of bentonite; the inorganic anti-corrosion coating for high-temperature curing of the automobile brake disc has the advantages that the salt spray resistance time can reach 1000 hours and the adhesive force is good on the premise that the coating thickness is 30 mu m; the influence of different dispersants on the salt fog resistance of a paint film is remarkable, the hydrophobic ammonium salt forms a good water-resistant film, the sodium salt hydrophilic dispersant has low relative molecular mass, and the water resistance and the salt fog resistance of the paint film are reduced.)

1. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc is characterized by comprising the following components in parts by weight: the composition comprises the following components in parts by mass: 40-45 parts of inorganic resin, 3-5 parts of modified zinc phosphate, 5-6 parts of composite ferrotitanium powder, 3-4 parts of curing agent, 10-15 parts of water, 20-25 parts of talcum powder, 0.8-2 parts of dispersing agent, 0.5-0.8 part of defoaming agent, 0.5-1 part of neutralizing agent and 0.5-1 part of bentonite.

2. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the inorganic resin is a reactive inorganic silicate resin.

3. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the modified zinc phosphate is a hydrate of aluminum zinc phosphate.

4. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the pigment volume concentration pvc in the coating is 15-35%.

5. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the curing agent is one or more of metal oxide, aluminum hydroxide, fluosilicate, borate and phosphate, and is nano-scale.

6. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: and the defoaming agent is BYK 035.

7. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: and the neutralizer is neutralizer AMP-95.

8. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the dispersant BYK 2012.

9. The high-temperature curing inorganic anticorrosive paint for the automobile brake disc according to claim 1, characterized in that: the composition comprises the following components in parts by mass: 45 parts of inorganic resin, 4 parts of modified zinc phosphate, 6 parts of composite ferrotitanium powder, 4 parts of curing agent, 15 parts of water, 21.5 parts of talcum powder, 2 parts of dispersing agent, 0.5 part of defoaming agent, 1 part of neutralizing agent and 1 part of bentonite.

10. The preparation method of the high-temperature curing inorganic anticorrosive paint for the automobile brake disc as claimed in any one of claims 1 to 9, characterized in that: the preparation method comprises the following steps:

(1) weighing the raw materials in proportion;

(2) firstly, stirring and dispersing modified zinc phosphate, composite ferrotitanium powder, aluminum hydroxide, water, talcum powder, dispersing agent and bentonite at a high speed, then adding the defoaming agent and half of the neutralizing agent in the formula into a kettle, and continuously stirring for 30 min;

(3) feeding the stirred slurry into a grinder to grind the slurry to the fineness of 10 mu m;

(4) adding inorganic resin into the ground slurry, then adding the rest defoaming agent and neutralizing agent, uniformly stirring, and adjusting the viscosity of the paint;

(5) and after the adjustment is finished, obtaining the high-temperature curing inorganic anticorrosive paint for the automobile brake disc.

Technical Field

The invention relates to the technical field of anticorrosive coatings, in particular to a high-temperature curing inorganic anticorrosive coating for an automobile brake disc and a preparation method thereof.

Background

The main problem of the high-temperature curing anticorrosive paint in the market at present is that the paint film is difficult to dry under the high-temperature condition when the high-temperature curing anticorrosive paint is used on a brake disc, the paint film is soft under the standard baking condition when the temperature reaches the standard baking condition, the problem is mainly caused by the structure of organic resin, the hardness of the paint film after a workpiece is cooled is lower than H, the surface compactness is poor, the hardness reaches H after 3 days generally, but the working efficiency is influenced, meanwhile, the water resistance, the salt spray resistance and the oil resistance of the paint film are poor, and the paint film is easy to fall off in a thermal shock.

Disclosure of Invention

The purpose of the invention is: overcomes the defects in the prior art, and provides the inorganic anticorrosive coating for high-temperature curing of the automobile brake disc, which has high paint film hardness, good paint film water resistance, salt spray resistance and oil resistance and strong adhesive force.

Another object of the invention is: provides a preparation method of the high-temperature curing inorganic anticorrosive paint for the automobile brake disc, which has simple preparation process.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a high-temperature curing inorganic anticorrosive coating for an automobile brake disc comprises the following components in parts by mass: 40-45 parts of inorganic resin, 3-5 parts of modified zinc phosphate, 5-6 parts of composite ferrotitanium powder, 3-4 parts of curing agent, 10-15 parts of water, 20-25 parts of talcum powder, 0.8-2 parts of dispersing agent, 0.5-0.8 part of defoaming agent, 0.5-1 part of neutralizing agent and 0.5-1 part of bentonite.

The main material of the design of the scheme is inorganic resin, the inorganic resin is reaction type inorganic silicate resin, silicate is used as a matrix, metal oxide, aluminum hydroxide, fluorosilicate, borate, phosphate and the like are used as curing agents, and high-crosslinking curing is formed at high temperature. The construction process on site is mechanical arm spraying, the pretreatment is degreasing and phosphating treatment of workpieces, the workpieces are baked in a drying tunnel at 230 ℃ for 10min after spraying, and the fast-curing inorganic resin is considered according to the construction process on site and can meet the process requirement.

Further, the inorganic resin is a reactive inorganic silicate resin.

Further, the modified zinc phosphate is a hydrate of aluminum zinc phosphate.

Further, the pigment volume concentration pvc in the coating is 15-35%.

Further, the curing agent is one or more of metal oxide, aluminum hydroxide, fluosilicate, borate and phosphate, and is nano-grade.

Further, the defoaming agent BYK035 is selected as the defoaming agent.

Further, the neutralizing agent is neutralizing agent AMP-95.

Further, the dispersant BYK 2012.

Further, the coating has a thickness of less than 30 μm during construction.

Further, the composition in parts by mass is as follows: 45 parts of inorganic resin, 4 parts of modified zinc phosphate, 6 parts of composite ferrotitanium powder, 4 parts of curing agent, 15 parts of water, 21.5 parts of talcum powder, 2 parts of dispersing agent, 0.5 part of defoaming agent, 1 part of neutralizing agent and 1 part of bentonite.

A preparation method of a high-temperature curing inorganic anticorrosive paint for an automobile brake disc comprises the following steps:

(1) weighing the raw materials in proportion;

(2) firstly, stirring and dispersing modified zinc phosphate, composite ferrotitanium powder, aluminum hydroxide, water, talcum powder, dispersing agent and bentonite at a high speed, then adding the defoaming agent and half of the neutralizing agent in the formula into a kettle, and continuously stirring for 30 min;

(3) feeding the stirred slurry into a grinder to grind the slurry to the fineness of 10 mu m;

(4) adding inorganic resin into the ground slurry, then adding the rest defoaming agent and neutralizing agent, uniformly stirring, and adjusting the viscosity of the paint;

(5) and after the adjustment is finished, obtaining the high-temperature curing inorganic anticorrosive paint for the automobile brake disc.

The technical scheme adopted by the invention has the beneficial effects that:

the inorganic anti-corrosion coating for high-temperature curing of the automobile brake disc has the advantages that the salt spray resistance time can reach 1000 hours and the adhesive force is good on the premise that the coating thickness is 30 mu m.

The modified zinc phosphate and the composite ferrotitanium powder are matched to be used as the antirust agent, so that the anticorrosive effect is optimal, the composite ferrotitanium powder mainly comprises phosphates with different forms, the phosphate is further processed to form the polyphosphate compound salt which does not contain water and has certain antirust capacity, and then, a plurality of nano curing agent powder materials are introduced to greatly improve the antirust capacity. Phosphate reacts with iron atoms on the surface of the steel structure to generate iron phosphate complex salt, and the complex salt is firmly attached to the surface of steel, so that the steel part is protected. After the nano curing agent material is introduced, a superdense paint film is formed, and the corrosion of water molecules, chloride ions, oxygen and the like to the surface of steel is effectively blocked, so that the physical rust prevention and the chemical rust prevention are realized. The rust prevention mechanism of modified zinc phosphate is basically the same as that of zinc phosphate, but because the modified zinc phosphate is a hydrate of aluminum zinc phosphate, the phosphate component is more than that of zinc phosphate, and the corrosion resistance and water resistance of a paint film are increased on the basis of the zinc phosphate. Therefore, through the matching of the composite iron-titanium powder and the modified zinc phosphate, the composite iron-titanium powder has the physical antirust effect and the chemical antirust effect, and the steel has the most effective anticorrosion capability in a long period.

The influence of different dispersants on the salt fog resistance of a paint film is remarkable, the hydrophobic ammonium salt forms a good water-resistant film, the sodium salt hydrophilic dispersant has low relative molecular mass, and the water resistance and the salt fog resistance of the paint film are reduced.

Drawings

FIG. 1 is a graph showing the relationship between the salt spray resistance and the pigment volume concentration PVC of the inorganic anticorrosive coating according to the present invention.

Detailed Description

The following examples are intended to provide those skilled in the art with a more complete understanding of the present invention, and are not intended to limit the scope of the present invention. Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.