Preparation method for flame-retardant powdered rubber

A powder rubber, flame retardant technology, applied in the field of preparation of powder rubber with flame retardant properties

Active Publication Date: 2013-06-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problem of easy spontaneous combustion of powder rubber during storage and transportation, and provides a preparation method of flame-retardant powder rubber. The release agent with flame-retardant groups synthesized by the invention is used in the process of latex coagulation into powder , the release agent is evenly coated on the surface of the powder rubber, and the flame retardant group is also evenly distributed on the surface of the powder rubber particles, thus endowing the powder rubber with a certain flame retardant performance, thereby ensuring the safety of the storage and transportation process

Method used

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  • Preparation method for flame-retardant powdered rubber

Examples

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Effect test

Embodiment 1

[0025] Step 1, the preparation of flame retardant type release agent: add 10mol monoenyl octadecanoic anhydride and 20molCCl in the reactor 4 Stir to mix evenly, add 0.1mol of (PhCO 2 ) 2 Initiator, control the reaction temperature at 40°C, add 5% (w) NaOH solution to the reactor after reacting for 60 minutes to adjust the pH of the reaction solution to 8.5, and stir for 20 minutes to obtain a spacer for use.

[0026] Step 2, preparation of flame retardant powder rubber: take 500g of 20% (w) styrene-butadiene latex, add 40g of the release agent of step 1, stir to make it evenly mixed, and then add 100g of CaCl 2 Coagulation is carried out, the temperature of the coagulation tank is controlled at 40°C, and the obtained slurry is washed and dried to obtain a flame-retardant powdered styrene-butadiene rubber.

[0027] Sampling, measuring flame retardant powdered styrene-butadiene rubber oxygen index is 23.5%, flame retardant.

Embodiment 2

[0033]Step 1, preparation of flame retardant release agent: add 10mol dienyl octadecanoic anhydride and 1molCCl to the reactor 4 Stir and mix evenly, add 0.05mol of (PhCO 2 ) 2 As an initiator, control the reaction temperature at 30°C, add 50% (w) NaOH solution to the reactor after reacting for 30 minutes to adjust the pH of the reaction solution to 8.5, and stir for 6 minutes to obtain a spacer for use.

[0034] Step 2, preparation of flame retardant powder rubber: take 500g of 20% (w) styrene-butadiene latex, add 10g of the release agent of step 1, stir to make it evenly mixed, add 200g of MgCl 2 Coagulation is carried out, the temperature of the coagulation tank is controlled at 45° C., and the obtained slurry is washed and dried to obtain powdered styrene-butadiene rubber.

[0035] Sampling, measuring flame retardant powdered styrene-butadiene rubber oxygen index is 24.8%, flame retardant.

Embodiment 3

[0041] Step 1, preparation of flame retardant release agent: add 10mol triene octadecanoic anhydride and 60molCCl in the reactor 4 Stir and mix evenly, add 0.3mol of (PhCO 2 ) 2 As an initiator, control the reaction temperature at 90°C, add 25% (w) NaOH solution to the reactor after 180 minutes of reaction to adjust the pH of the reaction solution to 8.9, and stir for 120 minutes to obtain a spacer for use.

[0042] Step 2, preparation of flame retardant powder rubber: take 500g of 20% (w) natural rubber latex, add 200g of the release agent of step 1, stir to make it evenly mixed, add 10g CuCl 2 Coagulation is carried out, the temperature of the coagulation tank is controlled at 55° C., and the obtained slurry is washed and dried to obtain powdered natural rubber.

[0043] Sampling, measuring the flame retardant powder natural rubber oxygen index is 25.8%, flame retardant.

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Abstract

Directed at the phenomenon that improper disposal in storage and transportation of powdered rubber easily causes spontaneous combustion, the invention provides a preparation method for flame-retardant powdered rubber. According to the method, carbon tetrachloride and the like are used as halogen donors, unsaturated fatty acid anhydride and the like are used as halogen acceptors, and the halogen donors and the halogen acceptors are subjected to an addition reaction and to saponification by an aqueous sodium hydroxide solution so as to prepare an isolating agent with a flame retardation function; then, the isolating agent is used for preparation of powdered rubber to produce a powdered rubber product with flame resistance; safety of the product in the processes of storage and transportation can be guaranteed.

Description

technical field [0001] The invention relates to a method for preparing powdered rubber, in particular to a method for preparing powdered rubber with flame-retardant properties. Background technique [0002] The average particle size of powder rubber is about 1mm, and its specific surface area is about 6×10 -4 m 2 / g, compared with bulk rubber, the contact area between powder rubber and oxygen in the air is much larger, and the surface of powder in the piled state is easily oxidized to release heat and cause spontaneous combustion. For example, the oxygen index of powdered styrene-butadiene rubber is 18% to 20%, which is a combustible rubber. The spontaneous combustion of powdered styrene-butadiene rubber has occurred in the storage process. [0003] Since powder rubber is still a new type of rubber product, there are few literature reports on its flame retardancy. At present, the flame retardant methods in the field of bulk rubber mainly include adding flame retardants an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C1/14C08C1/15C08K5/098C08L9/06C08L9/02C08L7/00C08L9/00
Inventor 艾纯金战德生高阳光朱晶张志强刘宗炜龚光碧赵旭涛郑聚成梁滔李晶李树毅张小齐李昌伟何颖魏绪玲徐典宏康安福陈建刚李波
Owner PETROCHINA CO LTD
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