Method for determination of oil absorption of aluminium hydroxide filler
A method for determining the oil absorption of high white aluminum hydroxide fillers with refined linseed oil and DOP. Coarse, medium and fine samples were selected to study the factors affecting the measurement, such as temperature, stirring method and stirring time. At the same time, linseed oil, castor oil and dioctyl phthalate were compared under the same conditions. Through the measurement of foreign products, the consistency of the measurement results with the measurement results of international famous companies is verified. Aluminum hydroxide filler is more and more widely used as an additive, and oil absorption has become an important technical index of additives. At present, there is no unified determination of oil absorption in the domestic aluminum hydroxide filler industry.
A method for determining the oil absorption of high white aluminum hydroxide fillers with refined linseed oil and DOP. Coarse, medium and fine samples were selected to study the factors affecting the measurement, such as temperature, stirring method and stirring time. At the same time, linseed oil, castor oil and dioctyl phthalate were compared under the same conditions. Through the measurement of foreign products, the consistency of the measurement results with the measurement results of international famous companies is verified.
aluminum hydroxideFiller as an additive is more and more widely used, oil absorption has become an important technical indicators of additives. At present, there is no unified method for measuring the oil absorption of aluminum hydroxide filler industry in China. Famous companies in the same industry abroad use refined linseed oil or DOP (dioctyl phthalate) as measuring reagents. For example, German companies use linseed oil, which is measured by international standard ISO787/5. Some in the same industry in Japan are used to detect the oil absorption of linseed oil and DOP. Some use DOP to detect oil absorption. The particle shape and particle size distribution of aluminum hydroxide filler have a great influence on oil absorption. As an additive, under the premise of the same particle shape, the lower the oil absorption, the lower the viscosity during use; under the premise that the particle size distribution is basically the same, the particle shape is the main factor affecting the oil absorption. A series of influencing factors such as measuring temperature, stirring time and stirring method were studied. The international refined linseed oil and DOP used by famous foreign companies were used as measuring reagents to establish a detection method in line with international standards. The application of this method will help the product to occupy the domestic market, and at the same time better enter the international market, and produce products that satisfy users.
1 Test part
1.1
(1) Instruments, equipment and materials f) Wang du is not less than 0.01g
(2) Special electric stirrer j
(3) glass beaker lOOmL;
(4) The glass rod has a diameter of about 5mm and a length of about 200mm;
(5) analytically pure castor oil;
(6) refined linseed oil;
(7) dioctyl phthalate (DOP);
(8) Test samples 1#(D50 1 m),2#(Ds0 10/~ m),3#(D50 90 m).
1.2 test method
Weigh a certain amount of sample in a dry beaker, use a burette to add reagent, and use a glass rod to fully stir until the sample forms a mass. The oil absorption was calculated based on the amount of reagent added.
2 Results and discussion
Effect of 2.1 sample moisture on measurement results
The water content of qualified products with high self-aluminum hydroxide filler is relatively low. Generally, the finer the particle size, the higher the water content. For products with a median diameter of 1 m, the water content is generally about 0.4, and the water content of 10,um is about 0.2. In order to measure whether the moisture has an effect on the oil absorption, keep the temperature in an oven at 110 ℃ for 2h, then put it in a desiccator to cool to room temperature, and compare the measurement with the unbaked sample.
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Hefei Zhongke Flame Retardant New Material Co., Ltd
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Ministry of Foreign Trade Telephone:13956052398
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