This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation and storage of vulcanization accelerator M (2-mercaptobenzothiazole) for the rubber industry. This standard applies to the vulcanization accelerator M produced by the high-pressure reaction of sulfur, carbon disulfide and aniline, and also applies to the vulcanization accelerator M synthesized by o-nitrochlorobenzene, sodium sulfide, sulfur and carbon disulfide under normal pressure. GB/T 11407-2003 Vulcanization Accelerator M GB/T11407-2003 Standard download decompression password: www.bzxz.net

This standard replaces GB/T11407-1989 "Vulcanization Accelerator M". GB/T11407-2003
This standard is not equivalent to the Japanese Industrial Standard JIS K6220-2:2001 "Test Methods for Rubber Compounds Part 2: Organic Vulcanization Accelerators and Organic Vulcanizers". The main technical differences and reasons between this standard and JIS K6220-2:2001 are as follows: In order to facilitate the implementation of the standard, the melting point determination device specified in this standard is slightly different from that of the Japanese Industrial Standard (11.3 of JIS K6220-2:2001; 5.2 of this standard);
-For ease of operation, regarding the determination of sieve residue, JIS K6220-2:2001 stipulates that the sieve residue of two specifications of 0.075mm and 0.150mm shall be determined by wet method. This standard stipulates that the sieve residue of 0.150mm sieve shall be determined by dry method. The main differences between this standard and GB/T11407-1989 are as follows: the provisions on test methods refer to the corresponding national standards (Chapter 5 of the 1989 edition and Chapter 5 of this edition); the temperature of the sample for melting point determination, the capillary specifications and the control of the heating rate are changed (5.1 of the 1989 edition; 5.2 of this edition); the control range of the temperature for heating loss determination is changed (5.3 of the 1989 edition; 5.3 of this edition); the temperature control range for ash determination is changed (5.2 of the 1989 edition; 5.4 of this edition). This standard is proposed by the China Petroleum and Chemical Industry Association. This standard is under the jurisdiction of the Chemical Additives Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. The drafting unit of this standard: Organic Factory of Lanzhou Chemical Industry Company of PetroChina. The main drafter of this standard: Li Yonghong.
This standard was first issued in 1989 and this is the first revision. 1
1Scope
Vulcanization accelerator M
GB/T 11407—2003
This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation and storage of vulcanization accelerator M (2-mercaptobenzothiazole) for rubber industry.
This standard applies to the vulcanization accelerator M produced by the high-pressure reaction of sulfur, carbon disulfide and aniline, and also applies to the vulcanization accelerator M synthesized by o-nitrochlorobenzene, sodium sulfide, sulfur and carbon disulfide under normal pressure. Trade name: Vulcanization accelerator M
Chemical name: 2-thiol thiazole
Structural formula:
Molecular formula: C, HsNS2
Relative molecular mass: 167.26 (1999 international relative atomic mass) 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. GB/T191 Pictorial symbols for packaging, storage and transportation (GB/T191-2000, eqvISO780:1997) GB/T1250 Methods for expressing and determining limit values ​​GB/T6678 General rules for sampling of chemical products
GB/T11409.1 Method for determining melting point of rubber antioxidants and vulcanization accelerators GB/T11409.4 Method for determining heating loss of rubber antioxidants and vulcanization accelerators GB/T 11409. 5bzxZ.net
GB/T 11409.7
3 Requirements
Method for determining the sieve residue of rubber antioxidants and vulcanization accelerators Method for determining the ash content of rubber antioxidants and vulcanization accelerators Vulcanization accelerator M shall comply with the technical requirements of Table 1. Table 1
Requirements for vulcanization accelerator M
Initial melting point/℃
Mass fraction of heating loss/%
Mass fraction of ash/%
Mass fraction of "residue on sieve"/%
Residue on sieve is not applicable to granular products.
Superior product
First-class product
Light yellow or off-white powder, granular
Qualified product
GB/T 11407--2003
4 Sampling
Sampling is carried out in batches. The number of sampling units shall comply with the provisions of GB/T6678. When sampling, use a sampling probe to take samples from the upper, middle and lower parts, mix them evenly, and use the quartering method to take out no less than 600g of samples, which are divided into two clean and dry ground-mouth bottles (plastic bags) and sealed. Labels are attached to the bottles (bags), indicating: product name, batch number, sampling date, etc. One bottle is for inspection and the other is kept for future reference. 5 Test method
The test results are determined by the rounded value comparison method specified in GB/T1250. 5.1 Appearance
Visual evaluation.
5.2 Determination of initial melting point
Perform according to the provisions of GB/T11409.1. The inner diameter of the capillary tube containing the sample is 1.2mm~1.4mm, the glass thickness is 0.2mm~～0.3mm, and the sample is filled with 3mm~~6mm. When the temperature of the heat transfer liquid is 25℃ lower than the predicted melting point, increase the temperature at 3℃ per minute until it is 10℃ lower than the predicted melting point. Attach the capillary tube containing the sample to the thermometer so that the center of the sample is at the same height as the middle of the mercury ball of the thermometer, insert it into the heat transfer liquid, and increase the temperature at 1℃ per minute. Temperature.
5.3 Determination of heating loss
According to the provisions of GB/T11409.4, the temperature of the electric constant temperature drying oven is controlled at (100±2)℃. 5.4 Determination of ash
According to the provisions of GB/T11409.7, the temperature of the high temperature furnace is (750±25)℃. 5.5 Determination of sieve residue
According to the provisions of GB/T11409.5 dry method, the test sieve aperture is 0.15mm, and the sieve frame specification is $200mm×50mm6 Inspection rules
6.1 Factory inspection
All items specified in Table 1 are factory inspection items. 6.2 Re-test
If one of the indicators does not meet the requirements of this standard, the sample should be re-tested from twice the amount of packages. Even if only one indicator does not meet the standard requirements, the whole batch of products cannot be accepted. 7 Marking, packaging, transportation and storage
7.1 Marking
Each package of vulcanization accelerator M should indicate the product name, trademark, net content, manufacturer name, factory address, batch number, production date, etc., and in accordance with GB/T191, mark "hand hook" and "fear of rain" signs. Each batch of products sold should be accompanied by a quality certificate, which includes: manufacturer name, factory address, standard promotion number, grade, batch number, production date, etc. 7.2 Packaging
Vulcanization accelerator M is packaged in woven bags lined with plastic bags or fiber barrels or wooden barrels lined with plastic bags. The net content of each bag (barrel) is 25kg or 50kg. Other packaging can also be used according to user needs. 7.3 Transportation
Vulcanization accelerator M should be transported away from sunlight and rain. 7.4 Storage
Vulcanization accelerator M should be stored in a dry warehouse, and the distance from the wall should be greater than 0.5m. It should not be placed near water supply or heating equipment to prevent moisture or deterioration, and should not be placed near fire sources. The storage period of this product is two years.
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