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Preparation method of compound type cobalt stearate adhesion promoter

An adhesion promoter, cobalt stearate technology, applied in the field of material engineering, can solve the problem of difficult control of technical indicators, and achieve the effects of outstanding adhesion performance and anti-aging performance, improved performance, and reduced energy consumption.

Active Publication Date: 2010-10-20
JIANGSU KAOU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problem that its technical index is difficult to control and improve its performance by improving the synthesis method of cobalt stearate

Method used

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  • Preparation method of compound type cobalt stearate adhesion promoter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve inorganic soluble cobalt salts in water, prepare a cobalt solution with a cobalt concentration of 15-45g / L (based on the amount of pure cobalt), and then prepare a sodium hydroxide solution with a concentration of 100-300g / L and a concentration of It is a sodium carbonate solution of 150-300g / L, and the above three solutions are filtered separately for later use;

[0025] (2) Heat the cobalt solution to 85±5°C, and slowly add a sodium hydroxide solution at a temperature of 40 to 50°C under stirring conditions. When the pH value of the reaction solution is 7, slowly add the solution at a temperature of For sodium carbonate solution at 40-50°C, when the pH value of the reaction solution is 9.5, stop adding sodium carbonate solution, maintain the temperature at 50-60°C, and continue stirring until the pH value does not change;

[0026] (3) The reaction solution obtained in step (2) is left to stand, and the precipitate is rinsed with water until the pH value o...

Embodiment 2

[0034] With the method of embodiment 1, difference is the difference of adding raw material amount in the step (6): first add the rosin acid of 48.8kg and xylene solvent miscible after step (5) makes 151.5kg cobalt Add and mix the powder, heat up to the melting point of stearic acid (about 70°C) at a speed of 30°C / h and add 603.5kg of stearic acid, then slowly add 29kg of isooctanoic acid under airtight conditions, and the input time is controlled at 0.5 to 2 hours In between, in order to ensure that all the materials react, the temperature of the materials is increased to 140°C at a rate of 20°C / h and kept for 2 hours.

[0035] Its physical and chemical performance parameters are listed in Table 2.

[0036] The physical and chemical performance parameters of the composite cobalt stearate adhesion promoter product that table 2 embodiment 2 makes

[0037] project

Embodiment 3

[0038] Embodiment 3 (comparative example):

[0039] Steps (1)-(5) and step (7) are the same as in Example 1, except for step (6).

[0040] Specifically: react 151.5kg of cobalt powder prepared with 720kg of stearic acid in solvent gasoline (boiling point at 150-175°C) environment, when the reaction temperature is below 100°C, heat up at a rate of 30°C / h, When the reaction temperature is 100-140°C, the temperature is raised at a rate of 5°C / h; when the reaction temperature is 140-160°C, the temperature rise time is controlled at 4 hours, and when the temperature reaches 160°C, the reaction ends, from feeding to discharging The reaction time is about 20 hours.

[0041] The physical and chemical performance parameters of the obtained organic cobalt salt adhesion promoter product (cobalt stearate) are shown in Table 3.

[0042] The physical and chemical property parameter of the cobalt stearate that table 3 embodiment 3 makes

[0043] project

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Abstract

The invention discloses a preparation method of a compound type cobalt stearate adhesion promoter, comprising the following steps of: converting inorganic dissoluble cobalt salt into precipitant cobalt which is not easy to dissolve in water; reacting precipitant cobalt powder with composite organic weak acid in an organic solvent for 10-18 hours; raising the reaction temperature to stearic acid melting temperature from room temperature with the speed of 20-30 DEG C / h; raising the reaction temperature to 140 DEG C at the speed of 20 DEG C / h; then, remaining 2 hours at the temperature of 140 DEG C, wherein the composite organic acid is a mixture of stearic acid, isocaprylic acid and abietic acid;, steaming the residual organic solvent after the reaction is finished; and pelleting to obtain the compound type cobalt stearate adhesion promoter. In the compound type cobalt stearate adhesion promoter prepared by the preparation method, the cobalt content can completely satisfy standard requirements, and the reaction conditions are reduced, thereby the energy consumption is reduced. Meanwhile, because the organic acid with low molecular weight and branched chains is used, the service performance of the compound type cobalt stearate adhesion promoter is increased, and the binding performance and the ageing resistance of the compound type stearate adhesion promoter are particularly outstanding.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to a preparation method of a composite cobalt stearate adhesion promoter. Background technique [0002] In the rubber product industry such as steel radial tires, steel wire reinforced conveyor belts, and steel braided rubber hoses, high-strength bonding of elastomers such as rubber and metal skeleton materials is required. The prior art usually adopts the direct addition type organic cobalt salt adhesion promoter (mainly including four major categories of cobalt stearate, cobalt naphthenate, cobalt decanoate and cobalt boroacylate), and cobalt stearate is composed of a single hard It is obtained by the direct reaction of fatty acid and inorganic cobalt, and its products have the following disadvantages in the application process: 1. Industrial-grade stearic acid is a mixture of straight-chain octadecyl saturated fatty acid and hexadecanyl saturated fatty ac...

Claims

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Application Information

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IPC IPC(8): C08K5/098C08L21/00C07C51/41
Inventor 于立珍周江淮傅秋明
Owner JIANGSU KAOU CHEM
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