HG/T 2334-2007Vulcanizing Accelerator TMTD (English PDF)

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).

Phi200mmx50mm/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.

6.1 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 product name, standard number, batch number, net weight etc.

6.2 Package

6.2.1 Product used woven bag is lined with plastic bag or fiber drums; the wooden

barrel is lined with plastic bag; the net weight of each package product is about 20kg

or 25kg.

6.2.2 If other package mode is required, then implement as per the contract.

6.3 Transportation

When moving, loading and unloading the product, handle with care; no throwing

arbitrarily, so as to prevent damage the package, and avoid sun and rain.

6.4 Storage

6.4.1 The product shall be stored in the dry warehouse; and keep away from the wall

about 0.5m. It shall not place in the vicinity of the upper and lower water or heating

equipment, so as to prevent moisture or deterioration; the storage temperature shall

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