Rare earth rubber vulcanization accelerator, and preparation method and application thereof

A technology of rubber vulcanization and accelerator, applied in the direction of organic chemistry, can solve problems such as application limitations, achieve the effect of promoting reinforcement, excellent comprehensive performance, and good vulcanization acceleration effect

Active Publication Date: 2011-02-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned zinc and rare earth dithiocarbamate accelerators are derivatives of secondary amines, which will be oxidized by oxygen in the air during high-temperature vulcanization to generate carcinogenic nitrite, so their application is restricted. Strict restrictions

Method used

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  • Rare earth rubber vulcanization accelerator, and preparation method and application thereof
  • Rare earth rubber vulcanization accelerator, and preparation method and application thereof
  • Rare earth rubber vulcanization accelerator, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Method for preparing accelerator:

[0037] Dissolve 29.426g (0.2mol) of glutamic acid with 60ml of water, then dropwise add 13.44ml (0.22mol) of carbon disulfide, add dropwise while stirring at a speed of 8 seconds / drop, until the dropwise addition is complete, continue to stir for half Hour. Transfer to a four-necked flask equipped with a cooling device and a thermometer, and raise the temperature to 35° C. for 3 hours in a water bath for reaction. Dissolve 70.08g LaCl in 100ml water 3 ·6H 2 O (0.2mol), after the lanthanum chloride was completely dissolved, was added to the above reaction solution to obtain a white precipitate. Filter, wash, and dry under vacuum at 40°C. The dried product was ground to obtain a off-white powder, namely the target product lanthanum glutamate dithiocarbamate.

[0038] The elemental analysis results are as follows: C: 18.29% (18.36%); H: 2.78% (3.03%); N: 3.56% (3.97%), and the experimental values ​​in brackets indicate that the mole...

Embodiment 2

[0040] Method for preparing accelerator:

[0041] Dissolve 29.426g (0.2mol) of glutamic acid in 60ml of water, then add 13.44ml (0.22mol) of carbon disulfide dropwise at a rate of 6 seconds / drop, and continue stirring for 1 hour after the addition is complete. Transfer to a four-neck flask equipped with a cooling device and a thermometer, and raise the temperature to 45°C for 2 hours in a water bath. Dissolve 70.08g LaCl in 100ml water 3 ·6H 2 O (0.2mol), after the lanthanum chloride was completely dissolved, was added to the above reaction solution to obtain a white precipitate. Filter, wash, and dry under vacuum at 40°C. The dry product is ground to obtain an off-white powder, which is the target product lanthanum glutamate dithiocarbamate.

Embodiment 3

[0043] Method for preparing accelerator:

[0044] Dissolve 29.426g (0.2mol) of glutamic acid in 60ml of water, then add 13.44ml (0.22mol) of carbon disulfide dropwise at a rate of 5 seconds / drop, and continue stirring for half an hour after the addition is complete. Transfer to a four-neck flask equipped with a cooling device and a thermometer, and raise the temperature to 70° C. for 2 hours in a water bath. Dissolve 72.97g SmCl in 100ml water 3 ·6H 2O (0.2mol), until the samarium chloride is completely dissolved, is added to the above reaction solution to obtain a white precipitate. Filtrate, wash, vacuum dry and grind at 40°C to obtain a gray-white powder, which is the target product samarium glutamic acid dithiocarbamate.

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Abstract

The invention discloses a rare earth rubber vulcanization accelerator, and a preparation method and application thereof. The accelerator is prepared by compounding rare earth ions and carboxylic acid substituted dithiocarbamate, wherein the rare earth ions may be one or the mixture of more than one of 14 rare earth elements, except promethium which is a radioactive element, with the atomic numbers of 57 to 71 in the periodic table of elements. The rare earth vulcanization accelerator of the invention is added into a rubber formula without adding the vulcanization active agents of stearic acid and zinc oxide to achieve good vulcanization effect and prepare a rubber composite material with high comprehensive mechanical properties which are remarkably superior to those of the accelerator zinc diethyl dithiocarbamate (ZDC) commonly used in industry at present in the same proportion, is a carbamate rare earth compound of primary amine, does not produce nitrite in a vulcanization process, and is environmentally-friendly.

Description

technical field [0001] The present invention relates to a rare earth rubber vulcanization accelerator and its preparation method and application. This accelerator can well promote the vulcanization of rubber, and also has the functions of surface modification of fillers, improvement of filler dispersion in polymers and Improve the functions of the interface between the filler and the rubber matrix, thereby improving the comprehensive physical and mechanical properties of the vulcanized rubber. Background technique [0002] Vulcanization accelerator is a main rubber additive. The use of vulcanization accelerators can reduce the vulcanization temperature, shorten the vulcanization time, reduce the amount of sulfur, increase the vulcanization rate, reduce the cost of the product, improve the physical and mechanical properties of the product, and have important practical significance for energy saving and consumption reduction and improving the performance of rubber products. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/16C08K5/39C08J3/24C08L21/00C08L9/06
CPCC08J3/24C08J2321/00C08F4/44C08K5/39C08J2309/06C08F236/10C07C333/16
Inventor 罗远芳刘岚杨树颜
Owner SOUTH CHINA UNIV OF TECH
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