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Multi-functional rubber additive and method for preparing same

A rubber additive and multifunctional technology, which is applied in the synthesis of rubber additives and the field of filler-reinforced rubber, can solve the problems of difficulty in meeting the requirements of the rubber industry and the single function of rubber additives, so as to improve dynamic mechanical properties and other properties, Improved mechanical properties and dynamic mechanical properties, long scorch time

Inactive Publication Date: 2009-06-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional rubber additives have a single function and are difficult to meet the requirements of the rubber industry

Method used

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  • Multi-functional rubber additive and method for preparing same
  • Multi-functional rubber additive and method for preparing same
  • Multi-functional rubber additive and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 0.1mol (16.7g) of 2-mercaptobenzothiazole and 250g of toluene into a three-necked round-bottomed flask, add 0.1mol (5.4g) of sodium methoxide, stir well, and heat the mixture to 120°C. And from one side of the three-necked flask at a distance of 0.1m 3 Nitrogen gas was introduced at a speed of 1 / h, and then 0.1mol (28.86g) γ-chloropropyltriethoxysilane was added to the above solution, and then reacted at 120°C for 18 hours under the protection of nitrogen gas, and the obtained product would settle The product was filtered, and the low-boiling fraction was distilled off under reduced pressure to obtain a yellow viscous liquid product with a yield of 93.5%.

[0021] The obtained product is 3-benzothiazolethio-1-propyl-triethoxysilane, named as Silane-M. Infrared spectroscopy (FTIR), gas chromatography-mass spectroscopy (GC-MS), elemental analysis and nuclear magnetic resonance (NMR) results showed that the synthesized product was the target product Silane-M.

[00...

Embodiment 2

[0033] Weigh 1mol (167g) of 2-mercaptobenzothiazole and 1.2kg of ethanol, place in a stainless steel container, add 1.5mol (87g) of sodium ethoxide, stir well, then add 1.5mol (336.8g) of γ-chloropropane Diethyl ethyldiethoxysilane was added to the above solution, and then reacted at 60°C for 0.5 hours under the protection of nitrogen, the obtained product was filtered, and the low boiling point fraction was removed by distillation under reduced pressure to obtain a yellow viscous liquid product 3 -Benzothiazolethio-1-propyl-ethyldiethoxysilane, named Silane-H, yield 76.2%.

[0034] Infrared spectroscopy (FTIR), gas chromatography-mass spectroscopy (GC-MS), elemental analysis and nuclear magnetic resonance (NMR) results showed that the synthesized product was the target product Silane-H.

[0035] The basic formulation of the silica-filled styrene-butadiene rubber unvulcanized rubber prepared with the product Silane-H is shown in Table 5 (unit: parts by weight), and the Mooney ...

Embodiment 3

[0046] Weigh 0.5mol (83.5g) of 2-mercaptobenzothiazole and 0.2kg of chloroform, place in a three-necked flask, add 0.75mol (30g) of sodium hydroxide, heat to 80°C, stir evenly, and blow in nitrogen , then add 0.5mol (85.25g) chloromethyltrimethoxysilane to the above solution, then react at 80°C for 6 hours under the protection of nitrogen, filter the precipitate, and distill under reduced pressure to remove the low boiling point fraction , and the yellow liquid product 3-benzothiazolethiomethyltrimethoxysilane was obtained with a yield of 83.7%.

[0047] Infrared spectroscopy (FTIR), gas chromatography-mass spectroscopy (GC-MS), elemental analysis and nuclear magnetic resonance (NMR) results showed that the synthesized product was the target product.

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Abstract

The invention provides a multi-functional rubber additive and a method for preparing same. The multi-functional rubber additive has an abovementioned molecular structural formula; wherein, the left side of the formula is provided with a benzothiazolyl radical; R1 is methylene, ethylidene or propylidene; R2 is cymene or ethyl; R3 is ethylidene, propylidene, methoxy or ethoxy. The preparation method comprises the steps as follows: 2-mercaptobenzothiazole (accelerant M) and alkali are dissolved in organic solvent; subsequently, chlorocarbon silane is added and reacts for 0.5-24 hours at the temperature of 20-120 DEG C under the mixing condition; the reaction products are filtrated, washed, and distilled by pressure-reduction so as to gain viscous liquid-shaped target products finally. The multi-functional rubber additive has multi-functions such as plasticizing, dispersing, promoting, reinforcing, and the like, simple preparation flow, high yield and simple separation process.

Description

technical field [0001] The invention relates to the synthesis of rubber additives and the field of filler-reinforced rubber, in particular to a multifunctional rubber additive and a preparation method. Background technique [0002] Rubber additives mainly include processing aids, vulcanization accelerators, reinforcing agents and anti-aging agents. Among them, processing aids include plasticizers, dispersants, softeners and tackifiers. In recent years, rubber additives have been developing in the direction of high efficiency and multi-energy. High efficiency refers to the addition of a small amount, and multi-energy refers to an additive with multiple functions. The use of multifunctional rubber additives can reduce the number of components in the formula to simplify the formula. The multifunctionality of additives can be realized by chemical synthesis, that is, introducing multiple functional groups into the additive structure. Such as the introduction of carboxyl groups...

Claims

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Application Information

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IPC IPC(8): C08K5/548C07F7/18C08L21/00
Inventor 罗远芳彭华龙贾德民刘岚
Owner SOUTH CHINA UNIV OF TECH
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