Some standard content:
Chemical Industry Standard of the People's Republic of China
Vulcanization Accelerator
Subject Content and Scope of Application
HG / T 2334 —92
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, storage and safety requirements for vulcanization accelerator TMTD.
This standard applies to the vulcanization accelerator TMTD obtained by oxidation or electrolysis of dimethylamine, carbon dioxide, sodium hydroxide or ammonia with oxygen, sodium nitrite, hydrogen peroxide, sodium nitrite
Trade Name: Vulcanization Accelerator TMTD
Chemical Name: Tetramethylthiuram disulfide Molecular Formula: C, HuN, S4
Structural formula:
CSS-
Relative molecular weight: 240.41 (according to the international relative atomic mass in 1989) Reference standards
GB191 Pictorial symbols for packaging and transportation
GB6678 Sampling center for chemical products
B11409.1: Determination method for melting point of rubber antioxidant and vulcanization accelerator GB11409.4 Determination method for heating and reducing plate of rubber antioxidant and vulcanization accelerator GB11409.5 Determination method for sieve residue of rubber antioxidant and vulcanization accelerator GB11409.7 Determination method for ash content of rubber antioxidant and vulcanization accelerator 3 Technical requirements
This product should meet the technical requirements of packaging 1,
Approved by the Ministry of Chemical Industry of the People's Republic of China on June 1, 1992, 1993~07 Implementation
Appearance (self-test)
Initial melting point,
Ash content\", %
Heating loss, %
(0.150 mm). %
Sieve residue"
HG 2334 —92
First-class product
Qualified product
White, charcoal gray powder or granules
Note: 1) At least one batch of ash content is randomly selected for determination in every 10 batches. 2) Sieve residue is only suitable for powdery products.
Test method
4.1 Appearance
Visual inspection.
4.2 Melting point determination
The melting point determination shall be carried out in accordance with GB11409.1. This standard makes the following supplementary provisions: 4.2.1 Instrument
. The melting point determination instrument shall be the electric heating melting point determination instrument specified in Article 2.1.2 of GB11409.1, b. Thermometer: Local thermometer, see Appendix A.140.0
4.2.2 Heating rate: Heat the melting point tester to 15°C lower than the predicted melting point, attach the capillary tube containing the sample to the thermometer, so that the sample layer in the capillary tube containing the sample is located in the middle of the mercury ball of the thermometer, and continue heating. The heating rate is about 3°C/min. From about 5°C lower than the predicted melting point, the heating rate is controlled to be about 2.8°C/min.4.2.3 Determination of initial melting point: This standard stipulates that the temperature when transparent liquid appears at the contact part between the inner wall of the capillary and the sample is the initial melting point. 4.2.4 Precision
Repeatability (): This standard stipulates r0.7°C, and the arithmetic mean of the results of two measurements is taken as the measurement result. b. Reproducibility (R): This standard stipulates R=I.6°C, 4.3 Ash content determination
Ash content determination adopts GB11409.7, and this standard makes the following supplementary provisions: 4.3.1 Ignition temperature: 800±25℃
4.3.2 Sample size: about 3g (accurate to 0.1g), 4.3.3 Permissible difference
The difference between two parallel determination results is not more than 0.04%, and the arithmetic mean is taken as the determination result, 4.4 Heating loss determination
Heating loss determination adopts GB11409.4, and this standard makes the following supplementary provisions: 4.4.1 Heating temperature: 75~80℃.
4.4.2 Permissible difference
The difference between two parallel determination results is not more than 0.05%, and the arithmetic mean is taken as the determination result, 4.5 Screen residue determination
W. Free download of customer standard industry information G 2334 -- 92
The residue is determined by the dry method in GB11409.5. This standard makes the following supplementary provisions: 4.5.1 Test sieve (GB6003): @200mm×50mm/0.150mm, 4.5.2 The percentage content w of the residue on the sieve is calculated according to formula (1): H
where: m—mass type of the residue on the sieve, g:
the mass of a sample, g
4.5.3 The relative error of the results of two parallel determinations shall not exceed 20% of the arithmetic mean, and the arithmetic mean shall be taken as the determination result. 5 Inspection rules
5.1 This product shall be inspected by the quality supervision of the manufacturer. Inspection by the inspection department. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. 5.2 The user has the right to accept the products received according to this standard. (1)
5.3 This product shall be packaged strictly according to the production batch (each reactor is a batch). It is strictly forbidden to submit the packaged products of different production batches for inspection
5.4 Sampling
5.4.1 Number of sampling units
If the number of units of the overall material is less than 500, the number of sampling units shall be selected according to Table 2 of GB6678. If the number of units of the overall material is greater than 500, the number of sampling units shall be calculated according to formula (2): 3×NwwW.bzxz.Net
Where: N is the number of units of the overall material.
5. 4. 2 Sample volume
The sample volume should be sufficient for three recalculation tests and the sample to be retained for reference, 300g-5.4.3 Sampling probe
The sampling probe is composed of a metal tube, made of stainless steel or aluminum. One end of the tube has a T-shaped handle and the other end has a conical blunt point. The side of the tube is cut off about 1/3 to make the tube U-shaped. The length depends on the packaging of the material. 5.4.4 Sampling method
When sampling, insert the sampling probe into the material at a certain angle, and turn the probe under the notch. After three circles, carefully pull the probe back, keeping the notch upward, and pour the material in the probe into the sample tray. After mixing, put it into two clean and dry ground-mouth bottles or plastic film bags, one bottle for inspection, and one bottle for future reference. 5.4.5 Sampling records
The name, source, number (or batch number), quantity, packaging, storage environment, number of samples and recommended sample quantity, name of the sampler, etc. of the sampled material should be recorded during sampling and mixing. 5.5 Storage and withdrawal of samples
The sample storage period is six months. Sample bottles (bags) should be placed neatly and orderly in a clean, dry, room temperature, and non-dirty sample cabinet according to date, and expired samples should be withdrawn in time.
5.6 Re-testing Rules
When abnormal analysis occurs, re-testing is required. First, the original sample is re-tested. Secondly, the whole batch, batch or single package are re-sampled and re-tested according to the actual situation, and the re-testing results are reported as the final results. 5.7 The test results are determined by the rounded value comparison method. 3
6 Packaging and marking. Purchase and storage
61 Packaging
HG 2334—92
6.1.1 Packaging personnel should wear protective clothing, masks, gloves, shoes, etc. 6.1.2 This product is packed in plastic film bags as inner bags and woven bags as outer bags. 6.1.3 The net weight of each bag is 25±0.2kg or 20±0.2kg. 6.1.4 This product should be packed strictly according to the production batch, and the batch submitted for inspection should correspond to the production batch. 6.1.5 Each batch of chemical accelerator TMTD shipped from the factory must be accompanied by a product certificate, which includes: manufacturer name, product name, grade, batch number, factory expiration date, product net quality, strict quality standard and additional information. 6.1.6 Packaging requirements: The inner bag is a line bag, and the outer bag is a bag! Sewing, 6.2 Marking
6.2.1 Packaging, storage and transportation mark points
Use the "hand hook prohibited mark" and "wet-afraid mark" specified in GB191. 62.2 Other related marks
Vulcanization accelerator TMTD Each bag of packaging should be marked with the manufacturer's name, product name, trademark, product brand or mark, production date (or number) or production batch, product production parameters, quality grade, this standard number and validity period in a conspicuous position, 6.3 Storage
6.3.1 Storage place: warehouse or awning storage. 6.3.2 Storage conditions: temperature shall not exceed 40℃, dry, no other pollutants, 6.3.3 Storage period: The storage period of this product is two years. If the storage period exceeds the storage period, re-test according to this standard. If it meets the potential quality technical requirements of this standard, it can still be used as usual.
Precautions for use
This product is irritating to the skin. Avoid contact with eyes and skin. Wash thoroughly after using this product. After drinking, the irritation is increased. Liquid
Liquid is covered with gas
Temperature range, ℃
Minimum scale line, ℃
Long scale line, ℃
Scale number,
Total length, mm
Diameter, mm
Diameter of mercury ball, mm
Length of mercury ball, mm
Immersion length, mm
Distance from the top of the mercury ball to the lowest scale line, mm
Allowance error of the shape of the part, seven
Additional remarks:
HG 2334 92
Appendix A
Specifications of Melting Point Thermometers
(Supplement)
This standard was proposed by the Department of Science and Technology of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Shanxi Chemical Research Institute. This standard was drafted by the Organic Plant of Lanzhou Chemical Industry Company of China Petrochemical Corporation. The main drafter of this standard is He Shuhua.
95-105
1 (per grid)
2 (per grid)
300—320
This standard adopts Japanese Industrial Standard JIS K6202—79 (84) "Organic Vulcanization Accelerators for Rubber". From the date of implementation of this standard, the former Ministry of Chemical Industry of the People's Republic of China Standard HG2---473-83 "Vulcanization Accelerators TuTnW玩磨
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