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Efficient halogen-free flame retardant butadiene styrene rubber composition and preparation method thereof

A technology of styrene-butadiene rubber and its composition, which is applied in the field of styrene-butadiene rubber composition and its preparation, can solve the problems of low flame retardant efficiency of magnesium hydroxide, deterioration of the mechanical properties of the matrix, and difficulty in molding and processing, and achieve excellent mechanical properties and low price. Effects of low cost and reduced use of carbon black

Inactive Publication Date: 2017-09-01
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the flame retardant efficiency of magnesium hydroxide is low, and the compatibility with the styrene-butadiene rubber matrix is ​​poor. When used alone, the filling amount required to make the styrene-butadiene rubber reach a certain flame-retardant level is above 150phr (the amount of styrene-butadiene rubber is 100phr). Causes serious deterioration of the mechanical properties of the matrix and leads to difficulties in forming and processing

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  • Efficient halogen-free flame retardant butadiene styrene rubber composition and preparation method thereof
  • Efficient halogen-free flame retardant butadiene styrene rubber composition and preparation method thereof

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[0039] Examples 1-3 The proportioning ratio of each raw material of the high-efficiency halogen-free flame-retardant styrene-butadiene rubber composition is shown in Table 2, and the preparation method is as follows:

[0040] A. Prepare styrene-butadiene rubber, hydroxymethyl lignin, transition metal silicate, magnesium hydroxide, carbon black, activator, antioxidant, accelerator and vulcanizing agent by mass parts;

[0041] B. Disperse hydroxymethyl lignin in styrene-butadiene rubber in the form of irregular spherical particles, and use rubber processing equipment to mix the rubber mixed with hydroxymethyl lignin to obtain hydroxymethyl lignin-filled styrene-butadiene rubber rubber composition;

[0042] C. Move the rubber composition in step B to an open mill, and at room temperature, add activator, anti-aging agent, carbon black, transition metal silicate, magnesium hydroxide, vulcanizing agent and accelerator successively for mixing ; Thin bag rolls out the sheet again, co...

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Abstract

The invention discloses an efficient halogen-free flame retardant butadiene styrene rubber composition and a preparation method thereof. The efficient halogen-free flame retardant butadiene styrene rubber composition is prepared from the following raw materials in parts by weight: 100 parts of butadiene styrene rubber, 20 to 40 parts of hydroxymethylated lignin, 40 to 80 parts of transition metal silicate, 40 to 60 parts of magnesium hydrate, 20 to 40 parts of carbon black, 5 to 8 parts of activating agent, 2 to 4 parts of anti-aging agent, 0.6 to 1.2 parts of promoter, and 1 to 3 parts of vulcanizing agent. By adopting the efficient halogen-free flame retardant butadiene styrene rubber composition disclosed by the invention, on the premise of ensuring the mechanical performance such as flexibility, tensile strength and tearing strength of a product, the limit oxygen index is increased remarkably, and less smoke and nontoxicity are realized during burning.

Description

technical field [0001] The invention relates to a high-efficiency halogen-free flame-retardant styrene-butadiene rubber composition and a preparation method thereof, belonging to the technical field of polymer material modification. Background technique [0002] Styrene butadiene rubber (SBR) is made of butadiene (CH 2 =CH-CH=CH 2 ) and styrene (C 6 h 5 C 2 h 3 ) copolymerized, it is a general-purpose synthetic rubber with large output, good comprehensive performance, low price and wide application, and occupies an important position in the rubber industry. However, the limiting oxygen index of styrene-butadiene rubber is only 19%. It is extremely flammable and will produce thick smoke and molten droplets when it is burned. Once it is ignited, it may cause a serious fire accident and pose a serious threat to human life and property. Therefore, , the flame retardancy of styrene-butadiene rubber-based composites has attracted widespread attention. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L97/00C08K13/02C08K3/34C08K3/22C08K3/04C08K5/09B29C35/02
CPCC08L9/06B29C35/02C08K2003/2224C08K2003/2296C08K2201/003C08K2201/014C08L2201/02C08L2201/22C08L97/005C08K13/02C08K3/34C08K3/22C08K3/04C08K5/09
Inventor 刘运春黄训辉丁剑平
Owner SOUTH CHINA UNIV OF TECH
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