Some standard content:
Chemical Industry Standard of the People's Republic of China
Vulcanization accelerator
(Ethylene thiourea)
1 Subject content and scope of application
HG/T2343-92
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of vulcanization accelerator ETU. This standard is applicable to the vulcanization accelerator ETU made from ethylenediamine and carbon disulfide as the main raw materials. Trade name: ETU vulcanization accelerator
Chemical name: Ethylenethiocarbamide
Structural formula:
Molecular formula: C, HN, S
Relative molecular mass: 102.16 (according to the international relative atomic mass in 1989) 2 Reference standards
GB6678 General rules for sampling of chemical productsbzxz.net
GB11409.1 Determination method for melting point of rubber antioxidant and vulcanization accelerator GB11409.4 Determination method for heating loss 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 in the following table. Approved by the Ministry of Chemical Industry of the People's Republic of China on June 1, 1992, 10
Implemented on July 1, 1993
Appearance (visual inspection)
Tough melting point,
Ash content, %
Heating alkali plate, %
Sieve residue (0.150mm), %
4. Test method
4.1 Melting point determination
HG 2343-92
Superior product
4.1.1.According to the provisions of GB11409.1 (electric heating melting point tester), 4. 1. 2. Allowable difference
White crystalline powder
The difference between the two parallel determination results shall not exceed 0.5C. The arithmetic mean is taken as the initial melting point of the sample. 4.2. Ash determination
According to GB11409.7, weigh the sample plate 2.8~3.2g, ignition temperature 800±20℃4.3. Heating loss determination
According to GB.11409.4, weigh the sample 2.8~3.2, heating temperature 100~105℃, 4.4 Screen residue determination
Qualified products
According to GB1140 The dry method specified in 9.5 shall be implemented. The specification of the standard sieve (GB6003) is 200mm×50mm/0.150mm.
5' Inspection rules
5.1 The vulcanization accelerator ETU shall be inspected by the quality supervision and inspection department of the manufacturer. Each batch of products shipped shall be accompanied by a quality certificate in a certain format.
5.2 The vulcanization accelerator ETU is a batch of uniform products per package.5.3 The user has the right to inspect and accept the products received in accordance with this standard. 5.4 Sampling method
5.4.1 Sample units shall be taken according to Table 2 in GB 6678.5.4.2 The random sampling method shall be adopted, and the sampling tube shall be placed on and in the bag (insert). Take equal amounts of samples from the following three parts and put them into clean salt black.
5.4.3 After carefully mixing the samples, take out no less than 300g by quartering and divide them into two clean and dry bottles with open mouths. Seal the bottle mouths and mark: manufacturer name, product name, batch number, sampling date. One bottle is sent to the quality supervision and inspection department for inspection, and the other bottle is stored in a dark place for re-inspection. The shelf life is three months. 5.5 If the inspection results do not meet the requirements of this standard, samples should be taken from two times the packaging bags (barrels) for re-inspection. If the re-inspection results still do not meet the standards, the batch of products will be downgraded or rejected. 5.6 When the two parties have objections to the strict quality and require arbitration, the two parties may negotiate to select the inspection agency and conduct arbitration analysis in accordance with the provisions of this standard.
6'Marking, packaging, transportation and storage
6.1: Marking
HG 2343 — 92
Each bag () shall be marked with the manufacturer's name, product name, trademark, grade, this standard number, batch number, net weight, and production date in the date-marked position.
2 Packaging
6.2.1 Vulcanization accelerator ETU shall be packaged in bags (barrels), polypropylene or polyethylene woven bags, lined with polyethylene bags, and the net weight of each bag (barrel) shall be 20±0.1kg, 25±0.1kg or 40±0.1kg, etc. 62.2 Each batch of packaged finished bags (barrels) shall be accompanied by a quality certificate, which includes the manufacturer's name, product name, grade, net weight, ex-factory date and this standard number, 6.3 Transportation
Protect from rain and moisture during transportation. Handle with care during loading to avoid damage to the packaging bag (orange). 6.4 Storage
4.1. The product should be stored in a dry warehouse, more than 0.5m away from the wall; it should not be placed near the upper and lower sewers and heating equipment to avoid moisture or deterioration. This product is flammable and should not be placed near fire sources. 6.4.2 Precautions for use
This product is irritating to the skin. Avoid contact with eyes and skin. Rinse thoroughly after contact with this product. 12
The liquid is full of gas
Temperature range,
Minimum scale,
Long scale line,
Scale number,
Total length, mm
Diameter. mm
Diameter of mercury column, mm
Length of mercury ball, 丑Ⅲ
Immersion length, 丑
The distance from the top of the water ball to the lowest scale line. mTop shape
Allowable error,
Additional remarks:
HG 2343 - 92
Specifications of melting point thermometers
(reference)
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of Shanxi Chemical Industry Research Institute. This standard was drafted by Shenyang Northeast Additives General Factory. The main drafters of this standard are Yan Yaqin, Yuzhen, and the specifications are as follows:
175-210
1(per)
10(per grid)
300~320
From the date of implementation of this standard, the standard HG2-475-83 "Vulcanization Accelerator NA-22" issued by the former Ministry of Chemical Industry of the People's Republic of China shall be used as the standard.
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