Cobalt Salt Cobalt ions and acids
Cobalt salt is a material composed of cobalt ions and acid radicals, which may also contain a certain percentage of other ions. Cobalt salt is used to enhance the adhesion of rubber and metal, has been widely recognized and widely used in radial tires and steel hose and other products.
Cobalt salt is a material composed of cobalt ions and acid radicals, which may also contain a certain percentage of other ions. There are many different types of cobalt salts. The cobalt salts have many types such as CoX2, CoF2, CoCl2, CoBr2, CoI2, CoOCo (OH) 2, CoCO3, Co (NO3) 2, CoSO4 and the like.
Organic acid cobalt salt is a special adhesive for rubber and brass or galvanized steel cord, which can be used alone for the production of high performance steel radial tires and high load steel wire hoses.
According to Huacheng metal network to understand, at home and abroad are widely used in the cobalt salt varieties are cobalt naphthenate, cobalt stearate, cobalt neodecanoate and boron borate and other types: commonly used cobalt naphthenate Cobalt content: 10-11%), cobalt stearate (cobalt content: 9-10%), cobalt neodecanoate (cobalt content: 20-21%), boron modified cobalt neodecanoate (cobalt content: 22- twenty three%).
Cobalt salt is used to enhance the adhesion of rubber and metal, has been widely recognized and widely used in radial tires and steel hose and other products. The cobalt salt can be added directly to the rubber as an accelerator for the adhesion of rubber to metal. Due to the difference between the product and each company in the bonding technology, in addition to the cobalt salt directly as a bonding enhancer, there are many companies using cobalt salt and sand (white) resin bonding system and use. But whether it is used alone or in combination, and no matter what kind of cobalt salt must control the metal cobalt content in the compound. This is because from the mechanism of adhesion, if the cobalt ion content in the compound is too high, not only promote the formation of a large number of inactive copper sulfide, but also catalyze the accelerated aging of rubber hydrocarbons; and cobalt ion content is too low, brass and sulfur Active copper sulfide so that good adhesion can not be achieved. From the performance of the rubber formulation itself, it is advantageous to add a small amount of the cobalt salt to the bond, but the high ratio of the cobalt salt is not only detrimental to the adhesion after the aging of the steam, Stretch performance also has a negative impact.
It is generally recommended that the amount of cobalt salt should not exceed 0.3% of the mass of the rubber in the formulation, that is, the metal cobalt content of 100 parts of the rubber hydrocarbon is not more than 0.3 parts. Due to the technical differences between each company, this amount is for reference only.
Since the average molecular weight of the various cobalt salt binders is different, it is necessary to convert the amount of metal cobalt actually required into the number of cobalt salt binder in the formulation. For this purpose, the number of copies of the actual recipe can be calculated by:
Number of recipes = cobalt content of cobalt / cobalt content of the product (where the amount of metal cobalt should be in the 0.15-0.35 points)
Example: Calculate the number of recipes of RC-B23 (cobalt content: 23%) binder added to the formula with 0.25 part of cobalt.