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HG/T 2334-2007

Chinese Standard: 'HG/T 2334-2007'
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Detail Information of HG/T 2334-2007; HG/T2334-2007
Description (Translated English): Vulanizing accelerator TMTD
Sector / Industry: Chemical Industry Industry Standard (Recommended)
Classification of Chinese Standard: G71
Classification of International Standard: 71.100.40
Word Count Estimation: 7,785
Date of Issue: 2007-09-22
Date of Implementation: 2008-04-01
Older Standard (superseded by this standard): HG/T 2334-1992
Quoted Standard: GB/T 191; GB/T 1250; GB/T 6003.1; GB/T 6679; GB/T 11409.1; GB/T 11409.4; GB/T 11409.5; GB/T 11409.7
Drafting Organization: (Hebei) Shenyang Northeast Auxiliary Chemical Industry Co., Ltd.
Administrative Organization: National Rubber and rubber products chemical additives Standardization Technical Committee Technical Committee
Regulation (derived from): National Development and Reform Commission Notice (2007 No. 60)
Summary: This standard specifies the vulcanization accelerator TMTD (tetramethyl thiuram disulfide) requirements, test methods, inspection rules, marking, packaging, transport and storage. This standard applies to dimethylamine, carbon disulfide, sodium hydroxide or ammonia obtained by oxidation or electrolytic vulcanization accelerator TMTD.

HG/T 2334-2007
HG
CHEMICAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.40
G 71
Record No.. 22271-2008
Replacing HG/T 2334-1992
Vulcanizing Accelerator TMTD
硫化促进剂 TMTD
ISSUED ON. SEPTEMBER 22, 2007
IMPLEMENTED ON. APRIL 1, 2008
Issued by. National Development and Reform Commission of the
People's Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Requirements ... 5 
4 Test Methods ... 5 
5 Inspection Rules ... 9 
6 Mark, Package, Transportation and Storage ... 10 
Foreword
This Standard replaces HG/T 2334-1992 Vulanizing Accelerator TMTD.
The major differences between this Standard and HG/T 2334-1992 are as follows.
--- Heating loss test conditions are changed into (80±2)°C; the index values are
0.30% (Clause 4.2 of Version 1992, Clause 4.3 of this version);
--- Ash test condition are changed into (750±25)°C, the index values are 0.30%
(Clause 4.3 of Version 1992, and Clause 4.4 of this version);
--- Technical indicator to increase purity is regarded as the test items required by
the user. Adopt high performance liquid chromatography (Clause 4.6 of this
version).
This Standard was proposed by China Petroleum and Chemical Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Rubber and Rubber Products, Chemical Additive Technical
Subcommittee..
Drafting organizations of this Standard. (Hebei) Shenyang Northeast Auxiliary
Chemical Industry Co., Ltd., Shandong Shanxian Chemical Co., Ltd., Hifull Chemical
Industry Co., Ltd., Zhejiang Huangyan Zhedong Rubber Chemical Co., Ltd., and
Zhenjiang ZhenBang Chemical Industry Co., Ltd..
Participating drafting organization of this Standard. Shanxi Learning-Production-
Research Chemical Industry Center.
Chief drafting staffs of this Standard. An Fang, and Song Kuijing.
This Standard was first-time released in 1992, and this revision is the first revision.
[Translator. The historical edition replaced by this Standard is as follows.]
--- HG/T 2334-1992.
Vulcanizing Accelerator TMTD
1 Scope
This Standard specifies the requirements, test methods, inspection rules, label,
package, transportation and storage of vulcanizing accelerator TMTD (Tetramethyl
thiuram disulfide).
This Standard is applicable to the vulcanizing accelerator TMTD that is prepared
through the oxidation or electrolysis of dimethylamine, carbon disulfide, sodium
hydroxide or ammonia.
Chemical name. TMTD (Tetramethyl thiuram disulfide)
Molecular formula. C6H12N2S4
Structural formula.
Relative molecular mass. 240.43 (as per 2005 international relative molecular
mass)
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods (GB/T 191-2000,
eqv ISO 780.1997)
GB/T 1250 Rules for Expression and Judgment of Limiting Values
GB/T 6003.1 Test Sieves of Metal Wire Cloth
specimen is 1.2mm~1.4mm, glass thickness is 0.2mm~0.3mm, filing specimen
3mm~6mm. If heat-transfer-liquid temperature is about 25°C lower than the forecast
melting point, then rise temperature as per 3°C/min; when it rises to 10°C less than
the forecast melting point, attach the capillary that is loaded with specimen onto the
thermometer, so that the specimen center is at the same height as the thermometer
mercury ball center; insert the heat-transfer-liquid; rise the temperature as per
(1±0.2)°C/min.
4.2.1 Determination of initial melting point
This Standard specifies that the temperature, when the transparent droplets appear
on contact position between the inner wall of capillary and the specimen, is the initial
melting point.
4.2.2 Allowable difference
The difference between two parallel measurement results shall be no more than 0.5°C;
take its arithmetic mean as the measurement result.
4.3 Determination of heating loss
Test as per the provisions of GB/T 11409.4; weigh approximately 3g (accurate to
0.1mg) of specimen; the temperature of electric thermostatic drier shall be controlled
at (80±2) °C; heating time is 2h.
4.4 Determination of ash
Test as per the provisions of GB/T 11409.7; weigh approximately 3g (accurate to
0.1mg) of specimen; the temperature of high-temperature furnace shall be controlled
at (750±25) °C. Burning time is 2h.
4.5 Determination of sieve residue
Test as per the provisions of GB/T 11409.5; test sieve (GB/T 6003).
Φ200mmx50mm/150μm.
4.6 Determination of purity
High performance liquid chromatography test – identification test and TMTD content
measurement shall be carried out simultaneously. Under the same chromatographic
operating conditions, the relative difference between specimen solution
chromatogram peak retention time and the TMTD chromatogram peak retention time
in the standard sample solution shall be within 1.5%.
4.6.1 Method summary
Specimen shall be dissolved by methanol; take methanol + water as the mobile phase;
use the stainless steel column and UV detector (254nm) with Nova-Pak C18 as the
Carry out sampling as per GB/T 6679. During the sampling period, use stainless steel
sampler to take upper, middle, and lower samples from the package; mix evenly the
selected specimens; use quartation to take less than 600g of sample; and separately
inject them into two clean and dry grinding mouth bottle (plastic bag); seal and label;
indicate the manufacturer name, product name, batch number, sampling date, and
sample collector name; one bottle (bag) shall be inspected by the inspection
department, anther bottle (bag) shall be sealed for three months for future review.
5.5 Re-inspection
If there is one index in the inspection result that doesn’t conform to the requirements
of this Standard, then sampling twice amount of product from the package; and carry
out re-inspection. If there is still one index that doesn’t conform to the requirements of
this Standard, then such batch products shall be judged disqualified.
6 Mark, Package, Transportation and Storage
6.1 Mark
6.1.1 Each exterior package shall be equipped with clear and firm mark; its contents
include product name, standard number, manufacturer name, address, contact phone,
registration trademark, net weight, production date, batch number etc. According to
the provisions of GB/T 191, the exterior package shall be marked with the sign of
“Hand-hook is prohibited” and “afraid of rain”.
6.1.2 Each packaged product shall be accompanied by a exit-factory certificate; its
contents include ......
Related standard:   HG/T 2343-2012  HG/T 2344-2012
   
 
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