Method for preparing compound fatty acid cobalt salt

A fatty acid and compound technology, applied in the field of preparation of compound fatty acid cobalt salts, can solve the problems of limited effect and adverse effect of anti-aging properties of rubber compounds, and achieve the effects of good anti-aging properties, reducing pollution and reducing production costs.

Active Publication Date: 2012-02-01
JIANGYIN SANLIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In order to solve the problem of the release amount and rate of active cobalt, some manufacturers currently increase the cobalt content by adding organic weak acids such as isooctanoic acid and abietic acid in the production process, so as to improve the performance of cobalt stearate. Its weak cobalt content improves the adhesive performance of cobalt stearate, but its effect is extremely limited, and the fact that some organic weak acids are added has a negative effect on the anti-aging performance of the rubber compound.

Method used

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Examples

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Effect test

preparation example Construction

[0038] The preparation method of the composite fatty acid cobalt salt of the present invention uses stearic acid, tall oil fatty acid (tall oil fatty acid) and cobalt hydroxide as raw materials to generate a new type of composite fatty acid mainly composed of cobalt stearate and cobalt taurate Cobalt salt, its reaction mechanism equation is as follows:

[0039] Co(OH) 2 + 2CH 3 (CH 2 ) 16 COOH→[CH 3 (CH 2 ) 16 COO]2 Co + 2H 2 o

[0040] Co(OH) 2 + 2R m COOH→(R m COO) 2 Co+2H 2 o

[0041] There are also some cobalt bonds that connect stearate ions and tall oil fatty acid ions at the same time:

[0042] Co(OH) 2 +R m COOH + CH 3 (CH 2 ) 16 COOH→R m COOCoOOC (CH 2 ) 16 CH 3 + 2H 2 o

[0043] R in the above formula m COOH refers to tall oil fatty acid, which mainly contains oleic acid, linoleic acid and the mixture of its isomers, and its main component is oleic acid. The molecular formula of oleic acid is:

[0044] CH 3 (CH 2 ) 7 CH=CH(CH 2 ) ...

Embodiment 1

[0054] According to 1 part Co(OH) 2 Need to consume stearic acid and 1 part Co(OH) 2 The tall oil fatty acid that needs to be consumed is proportioned.

[0055] Add 93.5g of tall oil fatty acid into a 500ml three-necked flask with a moisture collector and a back distillation condenser, heat up to 60~70°C, start stirring, add 86g of stearic acid, keep warm when the temperature rises to 75~80°C, After the stearic acid is completely melted, slowly add 20g of cobalt hydroxide, control the heating rate to prevent material rushing, keep warm when the temperature reaches 90~100°C, and when the reaction becomes stable, continue to add 10g of cobalt hydroxide, and heat up at an average speed (1.5 hours) Heat the reaction at 180°C for 1 hour, distill off the reaction product water, observe that there is no distillate in the reflux condenser, turn off the heating, and discharge. Cobalt content of the reaction product: 9.7%, softening point (round and round): 85°C, density: 1.01g / cm 3 ...

Embodiment 2

[0057] According to 1 part Co(OH) 2 Need to consume stearic acid and 1 part Co(OH) 2 The tall oil fatty acid that needs to be consumed is proportioned.

[0058] Add 187g of tall oil fatty acid to a 1000ml three-necked flask equipped with a moisture collector, back distillation condenser and vacuum pump, heat up to 60~70°C, start stirring, add 172g of stearic acid, keep warm when the temperature rises to 75~80°C , when the stearic acid is completely melted, slowly add 40g of cobalt hydroxide, control the heating rate to prevent charging, keep warm when the temperature reaches 90~100°C, steam the reaction product water, and continue to add 20g of cobalt hydroxide until the reaction becomes stable, Raise the temperature at an average speed (3 hours) to 200°C and keep it warm for 1 hour. Turn on the vacuum pump and pump under negative pressure for 10 minutes. Observe that there is no distillate in the reflux condenser. Turn off the vacuum pump to release the pressure, and turn of...

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Abstract

The invention relates to a method for preparing compound aliphatic acid cobalt salt, which is characterized in that stearic acid, tallol fatty acid and hydrogen cobalt oxide are taken as raw materials to generate the compound fatty acid cobalt salt which takes stearic acid and turic acid cobalt as main components, the proportion of stearic acid and tallol fatty acid are and calculated according to the actual acid value measurement of 1-4 parts of stearic acid which is required to be consumed by Co(OH)2 and 1 part of tallol fatty acid which is required to be consumed by Co(OH)2. The prepared compound fatty acid cobalt salt has good dissolvability while mixing with rubber, large active cobalt release amount, strong rubber and steel wire adhesion promoting function, good anti-aging properties, low cost, less pollution and the like.

Description

technical field [0001] The invention relates to a preparation method of complex fatty acid cobalt salt, which belongs to the technical field of organic chemical industry. Background technique [0002] Fatty acid cobalt salt is a kind of adhesive, which is mainly used in the production process of radial tires to increase the bonding strength between rubber and steel wire. Due to the limitation of its molecular structure, the traditional cobalt stearate releases less active cobalt than the current mainstream cobalt salt series (cobalt decanoate, cobalt boroacylate, etc.). In order to solve the problem of the release amount and rate of active cobalt, some manufacturers currently increase the cobalt content by adding organic weak acids such as isooctanoic acid and abietic acid in the production process, so as to improve the performance of cobalt stearate. Its weak cobalt content improves the cohesive performance of cobalt stearate, and its effect is extremely limited, and the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/098C07C51/41C08L21/00C08K13/04C08K7/00
Inventor 徐京海苏超陶秀军徐胜良
Owner JIANGYIN SANLIANG CHEM
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