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Preparation method of low-smoke, high flame-retardant powder styrene-butadiene rubber

A powder styrene-butadiene rubber, high flame retardant technology is applied in the field of preparation of flame-retardant powder styrene-butadiene rubber, which can solve the problems of generating a large amount of smoke and toxic substances, difficulty in breathing, poor flame retardant performance, etc., and improve the smoke suppression effect. , The effect of improving smoke suppression and compatibility

Active Publication Date: 2017-03-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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. Oxygen index is low and flame retardancy is poor, which brings potential fire hazards, which 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 and toxic substances are produced during combustion, which makes it difficult for people to breathe. The consequences are more serious, and it is the primary risk factor for casualties in fires

Method used

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  • Preparation method of low-smoke, high flame-retardant powder styrene-butadiene rubber
  • Preparation method of low-smoke, high flame-retardant powder styrene-butadiene rubber
  • Preparation method of low-smoke, high flame-retardant powder styrene-butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of functionalized smoke suppressant: Add 2.1 parts of KH-550, 150 parts of water and 6 parts of ethanol into the polymerization kettle, stir and mix evenly, adjust the pH value of the system to 4.5 with a mass concentration of 0.05% oxalic acid solution, and then Add 100 parts of aluminum hydroxide, stir and mix for 25 minutes; then add 7 parts of polyhydroxyethyl methacrylate, stir and mix for 2 hours; dehydrate, dry and grind to obtain functionalized aluminum hydroxide a.

[0041] (2) Preparation of flame-retardant grafted latex: first add 150 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 2 parts of sodium dodecylbenzenesulfonate, 0.4 parts of dodecylsulfur Alcohol, after replacing with nitrogen, then add 11 parts of tribromophenyl allyl carbonate graft monomer, stir and heat, add 0.15 parts of DCP when the temperature of the polymerization kettle reaches 45 ° C, react for 4 hours, and then...

Embodiment 2

[0044] (1) Preparation of functionalized smoke suppressant: Same as Example 1.

[0045] (2) Preparation of flame-retardant grafted latex: same as Example 1.

[0046] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of flame-retardant grafted latex a, 15 parts of functionalized aluminum hydroxide a, and 80 parts of water, add them to the coagulation kettle, stir and mix for 25 minutes, and then heat up to 50°C Add 2.7 parts of potassium oleate and 3.5 parts of magnesium chloride in turn, adjust the pH of the system to 9 with sodium hydroxide, stir for 20 minutes when the temperature rises to 80°C for aging, then wash, dehydrate, and dry to obtain low-smoke, high flame-retardant powder Styrene Butadiene Rubber Products. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 3

[0048] (1) Preparation of functionalized smoke suppressant: Same as Example 1.

[0049] (2) Preparation of flame-retardant grafted latex: same as Example 1.

[0050] (3) Preparation of flame-retardant powdered styrene-butadiene rubber: Take 100 parts of flame-retardant grafted latex a, 18 parts of functionalized aluminum hydroxide a, and 80 parts of water, add them to the coagulation kettle, stir and mix for 25 minutes, and then heat up to 50°C Add 3.5 parts of potassium oleate and 4.0 parts of magnesium chloride in turn, adjust the pH of the system to 9 with sodium hydroxide, stir for 20 minutes when the temperature rises to 80°C for aging, then wash, dehydrate, and dry to obtain low-smoke, high flame-retardant powder 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

A purpose of the present invention is to provide a preparation method of a low-smoke high-fire retardation type powder styrene butadiene rubber with the maximum smoke density of less than 130 and the oxygen index of more than 40%. According to the present invention, a butadiene-styrene latex is respectively subjected to graft polymerization modification with trihalo phenyl allyl carbonate and a polar monomer, water-soluble macromolecules are adopted to carry out coating modification on an inorganic smoke inhibitor, and the functionalized smoke inhibitor and the graft-modified butadiene-styrene latex are mixed and then directly aggregate into the powder. With the method, the problems of poor dispersity, easy agglomeration, easy migration, easy precipitation, and the like of the inorganic smoke inhibitor in the butadiene-styrene latex matrix are solved, and the smoke inhibition effect of the inorganic smoke inhibitor is significantly improved.

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 Patents(China)
IPC IPC(8): C08L51/04C08K9/10C08K9/06C08K9/04C08K3/22C08K3/26C08K3/24C08F279/02C08F218/00C08F220/06C08F222/06C08F220/56
Inventor 李树毅赵燕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