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Preparation method of halogen-free flame retardant rubber

A technology of flame retardant rubber and flame retardant, which is applied in the field of rubber, can solve problems such as environmental damage, achieve good flame retardancy, and be suitable for large-scale industrial promotion

Inactive Publication Date: 2014-12-10
JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rubber products are widely used due to their wear-resistant and oil-resistant properties. However, in actual use, it is found that rubber products release halogen-containing compounds when they are burned, causing great damage to the environment.
At present, commonly used alternative flame retardants include magnesium hydroxide, etc., but its flame retardant effect still needs to be further improved.

Method used

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  • Preparation method of halogen-free flame retardant rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1000 grams of styrene-butadiene rubber (SBR 1502, purchased from Nanjing Yangzi Petrochemical Jinpu Rubber Co., Ltd.), 60 grams of zinc oxide, 30 grams of stearic acid, 200 grams of magnesium hydroxide, 5-(4-hydroxyphenyl)-2H - 120 grams of pyran-2-one, 400 grams of carbon black (carbon black HAF, purchased from Changsha Carbon Black Factory), 50 grams of petroleum resin (petroleum resin C5, purchased from Nanjing Fancheng Biochemical Co., Ltd.) and four tetrasulfides Methylthiuram 50g;

[0019] Mix styrene-butadiene rubber in the SK-160 double-roller plastic mixer, the front roll of the mill is 135°C, the rear roll is 125°C, masticate for 15 minutes, and then add zinc oxide, stearic acid, magnesium hydroxide, 5-(4-Hydroxyphenyl)-2H-pyran-2-one, carbon black, petroleum resin and tetramethylthiuram disulfide, roll the raw materials left and right on the roller to make the mixing uniform and thin Packed 5 times, and the sheet was released to obtain a rubber materia...

Embodiment 2

[0021] A halogen-free flame-retardant rubber was prepared in the same manner as in Example 1, except that 5-(4-hydroxyphenyl)-2H-pyran-2-one was not used.

experiment example

[0023] Performance Testing

[0024] Mechanical properties: Tensile strength is tested according to GB / T 528-2009. The tensile strength of the sample of Example 1 is 16.9 Mpa; the tensile strength of the sample of Example 2 is 11.3 Mpa.

[0025] SEM observation: the sample of embodiment 1 and 2 is brittlely fractured under liquid nitrogen condition, and its cross-sectional appearance is observed by Hitachi S530 scanning electron microscope (SEM), and the results are shown in figure 1 and figure 2 .

[0026] Compare figure 1 and figure 2 , without flame retardant additives figure 1 The morphology of the broken surface is rough, and it can be clearly seen that the degree of dispersion of the blend system is poor, while the blend with the addition of flame retardant additives figure 2 The ambiguity of the cross-section is the highest, because the interfacial tension between the blend systems is reduced, the compatibility between the raw materials is improved, and the inte...

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Abstract

The invention relates to a preparation method of halogen-free flame retardant rubber. The method comprises the following steps: mixing butadiene styrene rubber in an SK-160-type dual-roll plastic mixing mill, wherein the temperature of a front roll of an open mill is 135 DEG C, and the temperature of a rear roll is 125 DEG C; plastifying for 15 minutes, and then adding zinc oxide, stearic acid, magnesium hydrate, 5-(4-hydroxycyclohexyl phenyl)-2H-pyran-2-ketone, carbon black, petroleum resin and tetramethyl thiuram disulfide; rolling the raw materials left and right on rollers in a crossing manner, and mixing evenly; thinning and packing for 5 times, and discharging slices, so as to obtain a sizing material with good dispersity; after preserving the sizing material for 8 hours, vulcanizing under the conditions of 50 DEG C and 10MPa. The halogen-free flame retardant rubber disclosed by the invention has the advantages of good fire resistance, and small harm to environment due to no halogen; therefore, the preparation method is very suitable for large-scale industrial popularization.

Description

technical field [0001] The invention relates to the field of rubber, in particular, the invention relates to a preparation method of a halogen-free flame-retardant rubber. Background technique [0002] Rubber products are widely used due to their wear-resistant and oil-resistant properties. However, in actual use, it is found that rubber products release halogen-containing compounds when they are burned, causing great damage to the environment. At present, magnesium hydroxide is commonly used as an alternative flame retardant, but its flame retardant effect still needs to be further improved. Therefore, there is a need in the industry for new halogen-free flame-retardant rubbers without degrading their mechanical properties. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of halogen-free flame-retardant rubber. [0004] In order to realize the object of the present invention, the present invention provides a kind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L57/02C08K13/02C08K3/22C08K5/09C08K3/04C08K5/40C08K5/1545B29B7/02B29C35/02
Inventor 张勇张卫兴
Owner JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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