There are many types of chlorinated paraffins. The more common ones are chlorinated paraffin 52, chlorinated paraffin 42, chlorinated paraffin 70, etc. The appearance of chlorinated paraffin 70 is a pale yellow solid or powder. This is a very obvious difference. The other two points, then, how to distinguish the remaining chlorinated paraffin 52 and chlorinated paraffin 42? Today, I will introduce you to the distinguishing method of chlorinated paraffin 52 and chlorinated paraffin 42. Helped.

Chlorinated Paraffin 52

1. How to distinguish

1. Appearance discrimination

(1) Color discrimination. The same is chlorinated paraffin, the color of different concentrations of chlorinated paraffin is a bit different, like chlorinated paraffin 52 and chlorinated paraffin 42 the same. The color of chlorinated paraffin 52 is light yellow to yellow, and the specific degree of yellowness is related to the environment and brightness at the time of observation. The color of chlorinated paraffin 42 is yellow or orange-yellow. From this point of view, the color of chlorinated paraffin 42 is a little darker than that of chlorinated paraffin 52. If two paraffins exist at the same time, it is easier to distinguish.

(2) Discrimination of viscosity. Viscosity discrimination can also be said to be fluidity discrimination. Because chlorinated paraffin 42 contains more liquid wax oil, it looks much thinner and has good fluidity, while the visual perception of chlorinated paraffin 52 is a bit thicker. Everyone When distinguishing, you can take out a little bit to see the fluidity of chlorinated paraffin. The better fluidity is chlorinated paraffin 42, and the less good is chlorinated paraffin 52.

2, use identification

Different concentrations of chlorinated paraffin have different uses. The main use of chlorinated paraffin 52 is in some coatings, insulation materials, plastics, etc., while the main use of chlorinated paraffin 42 is in some refractory paint, paper, canvas, etc. Of course, this method is only a rough distinction, because some At that time, the uses of chlorinated paraffin 52 and chlorinated paraffin 42 may overlap. At this time, you need to combine other methods to further distinguish.

3, heat separation temperature discrimination

"The thermal decomposition temperature of chlorinated paraffin 52 and chlorinated paraffin 42 is different, the thermal decomposition temperature of chlorinated paraffin 52 is 140 degrees, and the thermal decomposition temperature of chlorinated paraffin 42 is 120 degrees. Thermal decomposition method to distinguish two chlorinated paraffins is a relatively simple method is to heat the two chlorinated paraffins at the same time, but pay attention to control the same temperature, connect a tube to facilitate the collection of the decomposition of the gas, if the gas is released first, the instructions are first Decomposition, then, the chlorinated paraffin 42 is decomposed first, and the chlorinated paraffin 52 is decomposed later.

4. Density discrimination

Density discrimination involves special operation and observation. The specific steps are: Take 500ml samples of chlorinated paraffin 42 and chlorinated paraffin 52, and measure the density at the same temperature after heating. The density of chlorinated paraffin 42 is between 1.13 and 1.18. The density of chlorinated paraffin 52 ranges from 1.23 to 1.26. The result of the test with this method will be more accurate, and the parameterability will be higher.

2. Choosing method of chlorinated paraffin

1. Know your plan

(1) Chlorinated paraffin 52 can improve the film-forming properties of coatings, prevent the oil film from cracking after drying, and is used in coatings. It is also used as a flame retardant for thermal insulation materials, plastics, rubber and textiles because of its flame-retardant and oil-repellent characteristics. It is used in the processing of adhesives, inks, leather, etc. because it can improve the chemical resistance and water repellency of adhesives. in. Therefore, if you plan to use it in these fields, consider choosing chlorinated paraffin 52.

(2) Chlorinated paraffin 42 can be used as an auxiliary plasticizer for polyvinyl chloride, and it can interact with plasticizers such as DOP and BOP (up to 30%-50% of the mixture content), which can enhance the anti-aging performance of the product and reduce the main The fugacity and odor of the plasticizer can improve the mechanical strength, durability and water increase of the product. Used in lubricating oil (grease), it can reduce the freezing point, improve the pressure resistance and the strength and corrosion resistance of the oil film. Therefore, if considering using in these industries, choose chlorinated paraffin 42.

2, understand the quality of chlorinated paraffin

(1) Look at the color. As mentioned above, chlorinated paraffin 42 is a yellow or orange-yellow viscous oily liquid as a whole, while chlorinated paraffin 52 is generally a light yellow to yellow viscous liquid. If there are other large differences in appearance, you need to consider chlorination The purity or quality of paraffin wax is a matter of authenticity.

(2) Look at the water capacity. There are many types of chlorinated paraffins. These types are soluble in different solvents but insoluble in water. You can pay attention to test when purchasing to see if the chlorinated paraffins are soluble in water. If they are soluble in water, it means that they are not real chlorine. Fossil wax.

(3) Look at the price. Chlorinated paraffin is made from both chlorine and paraffin. The raw materials are fixed. If some merchants throw low prices, don't be fooled. There must be a basis for what you pay for. The price is lowered while the production The raw materials and processes used must be discounted. As a result, the chlorinated paraffins we buy can hardly reach the required level.

3, look at the manufacturer's strength

(1) See production capacity. See whether the chlorinated paraffin manufacturer has the ability to produce safe chlorinated paraffin; if it is convenient, you can visit the manufacturer, take a look at their production equipment, measure the professionalism of the production workers, etc., these are all to judge the strength of the manufacturer Important channels.

(2) Look at the manufacturer’s qualifications. Qualification is very important for a manufacturer, especially for manufacturers of chemical products such as chlorinated paraffin. The manufacturer can only produce after the relevant departments have approved the manufacturer's qualifications. Therefore, qualification is an important credential to see whether the manufacturer is regular or not.