GB/T 5211.3-2020General methods of test for pigments and extenders - Part 3: Determination of matter volatile at 105 degree-Celsius (English PDF)

5.1 and 6.1, Chapters 2 and 3 of the 1985 edition);

---Added the measurement method B method (using a moisture analyzer to test) and test data processing (see 5.2 and 6.2);

--- Modify the content of the test report (see Chapter 7, Chapter 4 of the 1985 edition).

This part uses the redrafting method to amend and adopt ISO 787-2.1981 ``General Test Methods for Pigments and Extender Pigments Part 2.

Determination of Volatile Matter at 105°C".

Compared with ISO 787-2.1981, this part has differences in structure. The "Foreword" and "Introduction" of the international standard have been deleted, and symbols have been added.

The "foreword" that meets the requirements of the national standard combines 5.1 and 5.2 in the international standard.

The technical differences between this part and ISO 787-2.1981 and the reasons are as follows.

---Regarding normative reference documents, this section has made adjustments with technical differences to adapt to my country's technical conditions and adjustments.

The situation is reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are. using the equivalent of ISO 15528 (revision of ISO 842)

Version) Chinese document GB/T 3186 instead of ISO 842 (see Chapter 2);

---The moisture analyzer and requirements have been added to meet the test requirements of the determination method B method (see 3.5);

---The determination method in ISO 787-2.1981 is listed as method A (using oven for test), and the test procedure and test of method A are modified.

Test data processing to make the test process of Method A more complete and convenient for users (see 5.1 and 6.1);

---Increase the measurement method B method (using a moisture analyzer to test) and test data processing to improve the test efficiency and meet the actual

International use requirements (see 5.2 and 6.2);

--- This section includes two determination methods, the test report needs to be issued according to different methods (see Chapter 7).

This section also made the following editorial changes.

---Change the standard name, in order to be consistent with the existing standard numbering method, change the standard name to "General Test Methods for Pigments and Extender Pigments"

Part 3.Determination of Volatile Matter at 105 degrees C";

This part was proposed by the China Petroleum and Chemical Industry Federation.

This part is under the jurisdiction of the National Paint and Pigment Standardization Technical Committee (SAC/TC5).

Drafting organizations of this section. Yixing Huayi Yipin Coloring Technology Co., Ltd., Changsha Zuxing New Material Co., Ltd., Hefei Xuyang Aluminum Yan

Materials Co., Ltd., Baihe Group Co., Ltd., Yinchuan Baihong New Material Technology Co., Ltd., Zhejiang Yutong New Material Co., Ltd.,

Shandong Dongjia Group Co., Ltd., Anshan Qicai Chemical Co., Ltd., Longkou United Chemical Co., Ltd., Zhongshan Yongheng Detection Technology

Co., Ltd., Xingbolian Yasida Pigment (Jinan) Co., Ltd., Lomon Baililian Group Co., Ltd., Zhejiang Huayuan Pigment Co., Ltd.

Company, Dongguan Dabao Chemical Products Co., Ltd., Fujian Wanan Industrial Group Co., Ltd., Guangzhou Natural Coating Chemical Co., Ltd., Qingdao Xingguo Co., Ltd.

Co., Ltd., CNOOC Changzhou Paint Chemical Research Institute Co., Ltd., Shenzhen Guanya Moisture Meter Technology Co., Ltd.

3.1 Weighing bottle. flat, wide mouth, with frosted glass stopper.

3.2 Oven. It can be maintained at (105+/-2) degrees C.

3.3 Balance. the actual division value d=0.001g or higher.

3.4 Desiccator. It is equipped with effective desiccant.

3.5 Moisture analyzer. It can maintain the heating temperature at (105+/-2) degrees C, and can automatically stop heating according to the set constant weight condition, the actual index value

d=0.001g, the accuracy is 0.01% or higher.

5.1 Method A (use oven for test)

Perform parallel determinations of two samples.

Open the stopper of the weighing bottle (3.1), heat it in an oven (3.2) at (105+/-2) degrees C for 2h, put it in a desiccator (3.4) to cool, cover the stopper, and weigh the weighing bottle to the nearest 1mg.

Spread (10 +/- 1) g of the sample evenly on the bottom of the weighing bottle (3.1), cover the stopper, and weigh the mass of the weighing bottle and sample before baking to the nearest 1 mg.

For pigments with larger loose volume, it is recommended to reduce the sample weight. If the sample is less than the required sample weight, it should be noted in the test report.

Remove the stopper, heat the weighing bottle (3.1) and the sample in an oven (3.2) at (105+/-2) degrees C for at least 1h, cool in a desiccator (3.4), and cover

Put on the stopper and weigh the mass of the bottle and sample after baking to the nearest 1 mg. Repeat the above operation until the quality difference between the two before and after does not exceed 5mg, that is