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CN-118772701-B - Liquid full-solid high-low-resistant Wen Depan anti-corrosion wax and preparation method thereof

CN118772701BCN 118772701 BCN118772701 BCN 118772701BCN-118772701-B

Abstract

The invention belongs to the field of anti-corrosion wax, and particularly relates to liquid full-solid high-low-resistant Wen Depan anti-corrosion wax and a preparation method thereof. The epoxy hydroxyl-terminated polybutadiene sodium guaranate comprises 63 parts of epoxy hydroxyl-terminated polybutadiene sodium guaranate, 35 parts of microcrystalline wax, 0.3 part of organic alkoxy titanate chelate, 0.7 part of organic zirconium chelate and 1 part of propylene glycol solution of organic iron chelate. The invention solves the problems of poor dryness, easy oil precipitation on the surface, low surface strength and easy pollutant absorption of the full solid wax through the dual mode of oxygen solidification and moisture solidification and the elastomer structure of polybutadiene, is different from the traditional full solid anti-corrosion wax, has a normal temperature fluid state, and is easier to construct and permeate gaps.

Inventors

  • GAO JIAN
  • ZHANG LEI
  • WANG SHENG
  • LIU XING
  • ZHOU YU

Assignees

  • 沈阳帕卡濑精有限总公司

Dates

Publication Date
20260505
Application Date
20240802

Claims (8)

  1. 1. The liquid full-solid high-low-resistant Wen Depan anticorrosion wax is characterized by comprising, by weight, 63 parts of epoxy hydroxyl-terminated polybutadiene guaranate, 35 parts of microcrystalline wax, 0.3 part of organic alkoxy titanate chelate, 0.7 part of organic zirconium chelate and 1 part of propylene glycol solution of organic iron chelate, wherein the oil content of the microcrystalline wax is 5-8%, and the melting point of the microcrystalline wax is 78 ℃; the preparation method of the epoxy hydroxyl-terminated polybutadiene guarana acid ester comprises the following steps: 1) Hydroxyl-terminated polybutadiene is dissolved in toluene solution, and after a catalyst 2-carboxyethyl phenyl phosphinic acid CEPPA is added for 1200 r/min, formic acid and hydrogen peroxide are added at a certain temperature, and the mixture is stirred for 24h at a low speed for epoxidation to obtain a liquid epoxy hydroxyl-terminated polybutadiene and toluene mixture; 2) Dissolving guarana acid in the mixture of the liquid epoxy hydroxyl-terminated polybutadiene and toluene to obtain a solution, adding a chromium tert-butyl furancarboxylate catalyst into the solution, maintaining the temperature at a higher temperature, stirring at a low speed, dehydrating, and carrying out esterification reaction to obtain a toluene solution of the epoxy hydroxyl-terminated polybutadiene modified by the guarana acid, and removing toluene to obtain the normal-temperature liquid epoxy hydroxyl-terminated polybutadiene guarana acid ester.
  2. 2. The liquid full solid high and low Wen Depan corrosion resistant wax according to claim 1 wherein in step 1) the molecular weight of the hydroxyl terminated polybutadiene is 800-1000.
  3. 3. The liquid full solid content high and low Wen Depan corrosion resistant wax according to claim 1, wherein in step 1), the mass ratio of hydroxyl-terminated polybutadiene to 2-carboxyethyl phenyl phosphinic acid CEPPA to formic acid to hydrogen peroxide=500:0.2:10:30.
  4. 4. The liquid full solids high and low Wen Depan corrosion resistant wax according to claim 1, wherein in step 1) said temperature is 55 ℃.
  5. 5. A liquid full solids high and low Wen Depan corrosion resistant wax according to claim 1 wherein in step 2) the higher temperature is 85 ℃.
  6. 6. The liquid full solids high and low Wen Depan corrosion resistant wax according to claim 1 wherein said organic alkoxy titanate chelate is commercially available under the name TYZOR IBAY.
  7. 7. The liquid full-solid high-low Wen Depan corrosion-resistant wax according to claim 1, wherein the organic zirconium chelate complex is commercially available as TYZOR 223, and the propylene glycol solution of the organic iron chelate complex is a propylene glycol solution of a triethanolamine iron complex, and the mass fraction of the triethanolamine iron complex is 35%.
  8. 8. The preparation method of the liquid full-solid high-low-resistant Wen Depan preservative wax is characterized by comprising the steps of heating 63 parts of epoxy hydroxyl-terminated polybutadiene guaranate to 90 ℃, adding 35 parts of microcrystalline wax, dispersing at a high temperature of 1200 revolutions per minute, cooling to 50 ℃, adding 0.3 part of organic alkoxy titanate chelate and 0.7 part of organic zirconium chelate, and stirring 1 part of propylene glycol solution of organic iron chelate to obtain the liquid full-solid high-low-resistant Wen Depan preservative wax.

Description

Liquid full-solid high-low-resistant Wen Depan anti-corrosion wax and preparation method thereof Technical Field The invention belongs to the field of anti-corrosion wax, and particularly relates to liquid full-solid high-low-resistant Wen Depan anti-corrosion wax for the field of automobiles. Background With the coming-out of passenger cars and commercial cars in recent years, the annual export of cars is increased year by year, but the rust problem is also gradually highlighted, and particularly, the chassis system of the car is more easily corroded by seawater in the process of transporting the car by sea, so that more overseas quality objections are caused. The traditional chassis corrosion prevention generally takes wax spraying as a main component, solvent type protective wax is generally adopted, and is sprayed on a vehicle chassis through airless spraying, and solvent type products generally have the problems of deep color, high VOC, low flash point and the like and cannot be directly used in a final assembly workshop. Due to the deficiencies of solvent products in terms of color, safety and VOC, automotive host factories also develop aqueous chassis anti-corrosion wax products, but aqueous wax products still contain small amounts of solvent (100 g/L), and VOC problems still remain for some host factories. Meanwhile, the water-based product has the defects of difficult drying in winter, poor water resistance, difficult rerouting and baking, higher temperature requirement for storage and transportation and the like, so that the problem of corrosion resistance of a vehicle chassis cannot be perfectly solved no matter the water-based product or the solvent-based product. In addition, no matter the water-based product and the solvent type anti-corrosion wax, the problem of high and low temperature resistance exists in different global environments in the later transportation and storage processes after the vehicle chassis is sprayed, wherein dust and foreign organisms are easily adhered reversely at high temperature in a concentrated manner, and the low-temperature wax film is cracked and shed, so that the problem that the chassis anti-corrosion wax is not adhered reversely at high temperature and is also low-temperature resistant and cracking is solved in future vehicle outlets is solved. The existing full-solid wax-containing system is a vegetable oil system, is dried in an oxygen curing mode (for example, CN113402980A is an automobile chassis rust-proof wax and a preparation method thereof), has high self viscosity, needs a large amount of mineral oil (more than or equal to 25%), is slow in drying speed, can cause serious surface oil seepage in the drying process due to the fact that the drying speed is increased by a cobalt drier, is easy to adsorb dust, cannot meet the requirements of GB/T1728-2020A (cotton ball blowing method), is softer in film forming texture and poor in stone impact resistance, is more suitable for a cavity wax system with low requirements on strength and drying, has safety limitation on cobalt element and is common and deep in color, is not suitable for the requirements of export vehicles on chassis corrosion prevention, and a large amount of dust and even organisms can cause complaints of overseas clients. Disclosure of Invention In order to solve the technical problems, the invention aims to provide the liquid full-solid high-low-resistant Wen Depan anticorrosive wax, which can achieve the surface drying effect in a short time by means of oxygen solidification and moisture solidification in the aspect of dual solidification under the normal temperature environment, so that the anticorrosive wax does not contain any solvent, does not need to additionally add mineral oil to dilute the viscosity, and achieves the aim of approaching 100% of solid. Meanwhile, the double bond and hydroxyl share structure is formed by the guarana esterified epoxy hydroxyl-terminated polybutadiene, the surface layer is contacted with oxygen through moisture in air to form a non-sticky flexible film in a short time, microcrystalline wax is sealed in the film, a compact high-temperature resistant resin film is formed on the surface, the wax content is low, and the anti-sticking of the microcrystalline wax in a high-temperature state is avoided. Meanwhile, the inner layer of the film has lower and lower crosslinking degree due to less and less contact with oxygen and moisture of the outer layer, the cross-linking layer has high wax content, the wax film is softer and softer, and good adhesion is formed on the substrate. Under the low temperature state, the inner wax film is not easy to crack, even if the outer layer is cracked under the action of external force, the inner wax film is contacted with oxygen and moisture again, and a cross-linked film can be formed again, so that the self-repairing wax film is formed. The liquid full-solid high-low chassis corrosion-resistant wax is characterized by compr