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Method for preparing environment-friendly low-smoke flame retardant powdered butadiene styrene rubber

A technology of powdered styrene-butadiene rubber and styrene-butadiene latex, which is applied in the field of preparation of low-smoke and flame-retardant powdered styrene-butadiene rubber, and can solve problems such as uneven dispersion

Active Publication Date: 2015-03-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method significantly improves the compatibility and particle size stability of expandable graphite and rubber materials, solves the problem of uneven dispersion of expandable graphite in the rubber matrix, and endows powdered styrene-butadiene rubber with flame-retardant and environmentally friendly properties , low smoke and high efficiency

Method used

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  • Method for preparing environment-friendly low-smoke flame retardant powdered butadiene styrene rubber
  • Method for preparing environment-friendly low-smoke flame retardant powdered butadiene styrene rubber
  • Method for preparing environment-friendly low-smoke flame retardant powdered butadiene styrene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of acylated styrene-butadiene latex: 100 parts of styrene-butadiene latex SBR1500, 2 parts of sodium dodecylbenzenesulfonate, 5.5 parts of CS 2 , then stirred and heated, and when the temperature of the polymerization kettle rose to 40°C, quickly added 0.05 parts of AlCl 3 , until the system turns orange-red, add 5 parts of phthalic anhydride, then react at 45°C for 2 hours, and finally add 12 parts by mass of 2.4% dilute hydrochloric acid aqueous solution to terminate the reaction, suction filter and wash to obtain phthalic anhydride SBR latex a. Sampling analysis: the measured degree of acetylation of acylated styrene-butadiene latex is 13.1%.

[0034] (2) Preparation of functionalized expandable graphite: Add 1.5 parts of NDZ-101 coupling agent, 60 parts of water, and 6 parts of ethanol into the polymerization kettle and stir and mix evenly. Adjust the pH of the system with a mass concentration of 0.05% oxalic acid solution to 5. Then add 100 parts ...

Embodiment 2

[0037] (1) Preparation of acylated styrene-butadiene latex: same as Example 1.

[0038] (2) Preparation of functionalized expandable graphite: Same as Example 1.

[0039] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of acylated styrene-butadiene latex a, 4 parts of functionalized expandable graphite a, and 50 parts of water into the coagulation kettle and stir and mix for 30 minutes, then heat up to 55 °C, Add 2.5 parts of potassium oleate and 3.5 parts of magnesium chloride in sequence, adjust the pH of the system to 9 with NaOH, stir for 25 minutes when the temperature rises to 80°C for aging, and finally wash, dehydrate, and dry to obtain low-smoke, flame-retardant powdered styrene-butadiene rubber products. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 3

[0041] (1) Preparation of acylated styrene-butadiene latex: same as Example 1.

[0042] (2) Preparation of functionalized expandable graphite: Same as Example 1.

[0043] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of acylated styrene-butadiene latex a, 6 parts of functionalized expandable graphite a, and 50 parts of water into the coagulation kettle and stir and mix for 30 minutes, then heat up to 55 °C, Add 2.5 parts of potassium oleate and 3.5 parts of magnesium chloride in sequence, adjust the pH of the system to 9 with NaOH, stir for 25 minutes when the temperature rises to 80°C for aging, and finally wash, dehydrate, and dry to obtain low-smoke, flame-retardant powdered styrene-butadiene rubber products. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

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Abstract

The invention provides a method for preparing environment-friendly low-smoke flame retardant powdered butadiene styrene rubber with the maximum smoke density less than 110 and the oxygen index more than 40%. In the invention, butylbenzene latex and acid anhydrides are subjected to acylation reaction, then polar latex is used to modify expandable graphite (EG) through coating, and finally the acylated butylbenzene latex and the functionalized EG are mixed to directly agglomerate to powder. According to the invention, the compatibility between the EG and the rubber material as well as the dimension stability of the particles are significantly improved, and the problem that the EG is dispersed non-uniformly in the rubber matrix is overcome. The flame retardant powdered butadiene styrene rubber is endowed with characteristics of environment-friendly property, low smoke and high efficiency.

Description

technical field [0001] The invention relates to a method for preparing flame-retardant powdered styrene-butadiene rubber, in particular to a low-smoke flame-retardant powdered styrene-butadiene rubber that is directly blended with acylated styrene-butadiene latex and functionalized expandable graphite (EG), and then condensed into powder method of preparation. Background technique [0002] As we all know, powdered styrene-butadiene rubber (PSBR) is a kind of hydrocarbon rubber. Its main chain contains a large amount of carbon, hydrogen and other elements. The oxygen index is low and the flame retardancy is poor, which brings potential fire hazards and limits the application of PSBR in mines, electronics, electrical industry, automobiles, aircraft, ships and other fields. At present, halogen-containing flame retardants are generally used in my country to prepare flame-retardant rubber. The advantage is that it has high flame retardancy. The disadvantage is that a large amoun...

Claims

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Application Information

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IPC IPC(8): C08L13/00C08C19/00C08C1/14C08K9/10C08K9/04C08K7/24C08K3/04
Inventor 徐典宏赵燕朱晶魏绪玲郑红兵张华强燕鹏华翟云芳桂强王永峰艾纯金
Owner PETROCHINA CO LTD
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