Method for preparing low-smoke and high flame retardant powdered butadiene styrene rubber

A technology for powdered styrene-butadiene rubber and styrene-butadiene latex, which is applied in the field of preparation of low-smoke and high-flame-retardant powder styrene-butadiene rubber, can solve the problems of low smoke and uneven dispersion of smoke suppressants, and achieves improved flame retardant performance and good anti-smoke properties. Smoke function, the effect of preventing burning

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 not only enables the flame retardant group to be effectively embedded in the main chain of the powdered styrene-butadiene rubber polymer, but also greatly improves the compatibility of the smoke suppressant and styrene-butadiene latex, and solves the problem of the smoke suppressant in the rubber matrix. The problems of uneven dispersion, migration and precipitation in the powder endow the powdered styrene-butadiene rubber with low smoke and high-efficiency flame retardancy

Method used

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  • Method for preparing low-smoke and high flame retardant powdered butadiene styrene rubber
  • Method for preparing low-smoke and high flame retardant powdered butadiene styrene rubber
  • Method for preparing low-smoke and high flame retardant powdered butadiene styrene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of functionalized smoke suppressant: Add 11 parts of pentaerythritol and 5 parts of heptadecyl saturated fatty acid into the polymerization kettle, adjust the pH value of the system to 9.5 with sodium hydroxide, and stir and react at 170°C for 2.5 hours , then add 150 parts of water and 100 parts of magnesium hydroxide, stir and mix for 40 minutes; dehydrate, dry and grind to obtain functionalized magnesium hydroxide a.

[0042] (2) Preparation of flame-retardant grafted latex: first add 200 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 2.5 parts of sodium dodecylbenzenesulfonate, 0.3 parts of dodecyl Mercaptan, after replacing with nitrogen, then add 7 parts of allyl bromide, stir and heat, add 0.2 parts of BPO when the temperature of the polymerization kettle reaches 45 °C, and react for 4 hours, then add 1.5 parts of acrylic acid (AA ) and 0.07 parts of BPO, after continuing to react for ...

Embodiment 2

[0045] (1) Preparation of functionalized smoke suppressant: Same as Example 1.

[0046] (2) Preparation of flame-retardant grafted latex: same as Example 1.

[0047] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of flame-retardant grafted styrene-butadiene latex a, 18 parts of functionalized magnesium hydroxide a, and 70 parts of water, add them to the coagulation kettle and stir and mix for 20 minutes, then heat up to At 50°C, add 3.5 parts of potassium oleate and 2.5 parts of magnesium chloride in sequence, adjust the pH value of the system with sodium hydroxide to 9.3 for coagulation, then heat up to 80°C and stir for 25 minutes for aging, and finally wash, dehydrate, and dry to obtain low Smoke, high 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

[0049] (1) Preparation of functionalized smoke suppressant: Same as Example 1.

[0050] (2) Preparation of flame-retardant grafted latex: same as Example 1.

[0051] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of flame-retardant grafted styrene-butadiene latex a, 19 parts of functionalized magnesium hydroxide a, and 80 parts of water, add them to the coagulation kettle and stir and mix for 20 minutes, then heat up to At 50°C, add 3.5 parts of potassium oleate and 2.7 parts of magnesium chloride in turn, adjust the pH of the system with sodium hydroxide to 9.3 for coagulation, then heat up to 80°C and stir for 25 minutes for aging, and finally wash, dehydrate, and dry to obtain low Smoke, high 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 low-smoke and high flame retardant powdered butadiene styrene rubber with the maximum smoke density less than 170 and the oxygen index greater than 39%. Allyl halogen and polar monomers are adopted in the invention to separately modify styrene-butadiene latex through graft polymerization. Then, a smoke inhibitor is treated through esterification reaction. Finally, the functionalized smoke inhibitor and the graft modified styrene-butadiene latex are mixed to directly agglomerate into powder. According to the invention, not only the flame retardant groups can be effectively embedded into the backbone of the powdered butadiene styrene rubber polymer, but also the compatibility between the smoke inhibitor and the styrene-butadiene latex is greatly improved, and problems that the smoke inhibitor disperses non-uniformly in the rubber matrix and is easy to migrate and precipitate and the like are overcome, and thus the powdered butadiene styrene rubber is endowed with characteristics of low smoke and efficient flame retardance.

Description

technical field [0001] The invention relates to a method for preparing a flame-retardant powdered styrene-butadiene rubber, in particular to a method for preparing a low-smoke and highly flame-retardant powdered styrene-butadiene rubber obtained by grafting a functionalized smoke suppressant and a flame retardant to a modified styrene-butadiene latex. 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 amount of smoke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K9/04C08K3/22C08K3/34C08K3/24C08K3/26C08F279/02C08F214/14C08F214/16C08F220/06C08F222/06
Inventor 徐典宏丛日新王新董万卓郑红兵文善雄王月霞翟云芳朱晶魏绪玲艾纯金
Owner PETROCHINA CO LTD
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