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A kind of preparation method of flame-retardant powder styrene-butadiene rubber

A technology for powder styrene-butadiene rubber and styrene-butadiene latex, which is applied in the field of flame retardant powder styrene-butadiene rubber preparation, can solve the problems of high modification cost, unstable product quality, migration of additives, etc., so as to solve the compatibility problem and avoid the Migration and precipitation, the effect of improving durability

Active Publication Date: 2017-01-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above patented methods, the use of small molecule flame retardants or small molecule halogen-containing flame retardants has certain compatibility problems with rubber materials, and there will be different degrees of additive migration, resulting in poor flame retardant durability.
At the same time, there are still problems such as large amount of flame retardant, high cost of modification, and unstable product quality.

Method used

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  • A kind of preparation method of flame-retardant powder styrene-butadiene rubber
  • A kind of preparation method of flame-retardant powder styrene-butadiene rubber
  • A kind of preparation method of flame-retardant powder styrene-butadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of flame-retardant grafted latex: first add 100 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 2 parts of sodium dodecylbenzenesulfonate, 0.3 parts of dodecyl Mercaptan, replace with nitrogen, then add 4 parts of tribromophenyl allyl carbonate, stir and heat, add 0.1 part of DCP when the temperature of the polymerization kettle rises to 50 °C, react for 3 hours, and then add 1.1 parts of allyl Base bromide and 0.05 parts of DCP, after reacting for 3 hours, add 0.12 parts of diethylhydroxylamine to prepare flame-retardant grafted latex. Sampling analysis: the grafting rate of the grafted latex was measured to be 32.1%.

[0042] (2) Preparation of flame-retardant powdered styrene-butadiene rubber: add 100 parts of flame-retardant grafted latex (grafting rate is 32.1%) into the coagulation kettle, then add 80 parts of water, stir, and when the temperature rises to 45 ° C, then Then add 2 parts ...

Embodiment 2

[0044] (1) 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, 3 parts of sodium dodecylbenzenesulfonate, 0.4 parts of dodecyl Mercaptan, replace with nitrogen, then add 6 parts of tribromophenyl allyl carbonate, stir and heat, add 0.12 parts of DCP when the temperature of the polymerization kettle rises to 50 ° C, react for 3 hours, and then add 1.2 parts of allyl Base bromide and 0.08 parts of DCP, after reacting for 3 hours, add 0.15 parts of diethylhydroxylamine to prepare flame-retardant grafted latex. Sampling analysis: the grafting rate of the grafted latex was measured to be 33.6%.

[0045] (2) Preparation of flame-retardant powdered styrene-butadiene rubber: add 100 parts of flame-retardant grafted latex (grafting rate is 33.6%) into the coagulation kettle, then add 100 parts of water, stir, and heat up to 45°C, then Then add 2.5 parts of potassium ol...

Embodiment 3

[0047] (1) Preparation of flame-retardant grafted latex: first add 190 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 4 parts of sodium dodecylbenzenesulfonate, 0.5 parts of dodecyl Mercaptan, replace with nitrogen, then add 8 parts of tribromophenyl allyl carbonate, stir and heat, add 0.13 parts of DCP when the temperature of the polymerization kettle rises to 50 °C, react for 4 hours, and then add 1.4 parts of allyl Base bromide and 0.06 parts of DCP, after reacting for 3 hours, add 0.18 parts of diethylhydroxylamine to prepare flame-retardant grafted latex. Sampling analysis: the grafting rate of the grafted latex was measured to be 38.1%.

[0048] (2) Preparation of flame-retardant powdered styrene-butadiene rubber: add 100 parts of flame-retardant grafted latex (grafting rate 38.1%) to the coagulation kettle, then add 100 parts of water, stir, and heat up to 45 ° C, then Then add 2.8 parts of potassium oleate...

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Abstract

The present invention discloses a fire retardation powder styrene butadiene rubber preparation method, which comprises respectively adding deionized water, an emulsifier and a molecular weight modifier to a butadiene-styrene latex, adding a grafting monomer trihalo phenyl allyl carbonate and an initiator, carrying out a grafting reaction for 3-6 h, adding a second grafting monomer allyl bromide and an initiator, carrying out the secondary grafting reaction for 2-4 h, adding a termination agent to obtain a fire retardation type graft latex, sequentially adding a separation agent, a coagulating agent and a buffer to the fire retardation type graft latex, and then carrying out aging, washing, dewatering and drying to obtain the fire retardation powder styrene butadiene rubber product. With the method, the fire retardation group can be effectively embedded into the main chain of the polymer, the prepared fire retardation powder styrene butadiene rubber has the excellent fire retardation effect, the production cost is low, and popularization and application are easily achieved, wherein the oxygen index can achieve more than 38%.

Description

technical field [0001] The invention relates to a preparation method of flame-retardant powdered styrene-butadiene rubber, in particular to a preparation method of flame-retardant powdered styrene-butadiene rubber. Background technique [0002] Powdered styrene-butadiene rubber (PSBR) is a new type of rubber material with important development prospects, which can be widely used in rubber products used in mines, electronics, electrical industry, automobiles, aircraft, ships and other fields. As we all know, this kind of rubber belongs to hydrocarbon rubber according to its molecular chain structure. Its main chain contains a large amount of carbon, hydrogen and other elements. , causing its low oxygen index and poor flame retardancy, which brings potential fire hazards and brings a lot of inconvenience to daily life. At present, with the increasing awareness of global safety and environmental protection, people have higher and higher requirements for fire safety and flame r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F279/02C08F218/00C08F214/16C08C1/14
Inventor 徐典宏刘春芳王兰海董万卓杨海江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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