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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 preparation of high flame-retardant powdered styrene-butadiene rubber and low-smoke fields. It can solve the problems of uneven dispersion, achieve improved compatibility, ensure particle size, and good flame-retardant effects Effect

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

[0040] (一)功能化可膨胀石墨:将2份钛酸酯偶联剂NDZ-101和60份水、6份乙醇加入到聚合釜中搅拌混合均匀,用质量浓度为0.05%草酸溶液调节体系pH值为4,然后加入100份可膨胀石墨,搅拌混合20min;再加入6份羧基丁苯胶乳搅拌混合50min;脱水、干燥、研磨得到功能化可膨胀石墨a。

[0041] (二)阻燃型接枝胶乳的制备:在聚合釜中首先加入150份去离子水、然后依次加入100份丁苯胶乳SBR1500、2.5份十二烷基苯磺酸钠、0.3份十二碳硫醇,用氮气置换后,紧接着先加入6份的烯丙基三苯基溴化磷接枝单体,搅拌、加热,待聚合釜温度达到50℃时加入0.15份BPO,反应8h后,然后在在加入2份的HEMA和0.05份BPO,继续反应3h后,加入0.2二乙基羟胺,制得阻燃型接枝丁苯胶乳a。取样分析:测得SBR-g-HEMA的接枝率为0.9%。

[0042] (三)阻燃粉末丁苯橡胶的制备:取100份阻燃型接枝胶乳a和1.5份功能化可膨胀石墨a、70份水加入到凝聚釜里搅拌混合25min,然后升温至50℃时,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,升温至80℃时搅拌25min进行熟化,然后经洗涤、脱水、干燥得到低烟、高阻燃粉末丁苯橡胶产品。取样分析:制成标准试样,经测试性能见表1。

Embodiment 2

[0044] (一)功能化可膨胀石墨的制备:同实施例1。

[0045] (二)阻燃型接枝胶乳的制备:同实施例1。

[0046] (三)阻燃粉末丁苯橡胶的制备:取100份阻燃型接枝胶乳a和3份功能化可膨胀石墨a、70份水加入到凝聚釜里搅拌混合25min,然后升温至50℃时,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,升温至80℃时搅拌25min进行熟化,然后经洗涤、脱水、干燥得到低烟、高阻燃粉末丁苯橡胶产品。取样分析:制成标准试样,经测试性能见表1。

Embodiment 3

[0048] (一)功能化可膨胀石墨的制备:同实施例1。

[0049] (二)阻燃型接枝胶乳的制备:同实施例1。

[0050] (三)阻燃型粉末丁苯橡胶的制备:取100份阻燃型接枝胶乳a和4份功能化可膨胀石墨a、70份水加入到凝聚釜里搅拌混合25min,然后升温至50℃时,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,依次加入3份油酸钾、2.5份氯化镁,用氢氧化钠调节体系pH值为9.3时进行凝聚,升温至80℃时搅拌25min进行熟化,然后经洗涤、脱水、干燥得到低烟、高阻燃粉末丁苯橡胶产品。取样分析:制成标准试样,经测试性能见表1。

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Abstract

The invention provides a method for preparing an environment-friendly low-smoke flame-retardant powdered butadiene styrene rubber with the maximum smoke density less than 100 and the oxygen index more than 45%. In the present invention, expandable graphite (EG) is subjected to coating modification by adopting polar latex. Then, styrene-butadiene latex is respectively modified by allyltriphenylphosphorus bromide and a polar monomer through graft polymerization. Finally, the grafted styrene-butadiene latex is mixed with the functionalized EG to directly agglomerate into powder. According to the invention, compatibility between the EG and the butadiene styrene rubber and dimensional stability of rubber particles are significantly improved. The problem that EG is dispersed non-uniformly in a butadiene styrene rubber matrix is overcome and the flame-retardant powdered butadiene styrene rubber is environment-friendly, low-smoke and high-efficient.

Description

technical field [0001] 本发明涉及一种阻燃粉末丁苯橡胶的制备方法,具体涉及一种功能化可膨胀石墨(EG)和接枝改性丁苯胶乳的低烟、高阻燃粉末丁苯橡胶的制备方法。 Background technique [0002] 众所周知,粉末丁苯橡胶(PSBR)是一种烃类橡胶,其主链上均含有大量的碳、氢等元素,受热熔化时易产生可燃气体,在高温时易与氧作用发生燃烧,造成其氧指数低,阻燃性能较差,由此带来了潜在的火灾危害性,限制了PSBR在矿井、电子、电器工业、汽车、飞机、轮船等领域里的应用。目前,我国工业上普遍采用含卤阻燃剂制备阻燃橡胶,其优点在于具有较高的阻燃性,缺点是燃烧时产生大量烟雾和毒性物质,造成人呼吸困难,其危害性往往比燃烧产生的后果更为严重,是火灾中致人伤亡的首要危险因素。近年来,随着全球安全环保意识的日益加强,人们对防火安全性及制品的阻燃性能的要求越来越高,开发研制新型低烟、高阻燃的燃橡胶材料已成为研究热点。 [0003] 现有技术中,有关橡胶材料的低烟、阻燃研究主要是通过添加阻燃剂和抑烟剂的方法来制备。如:CN101121796A公开了一种通过加入少量可膨胀石墨,制备阻燃效果好、燃烧时低烟无毒的无卤热塑性阻燃橡胶的生产方法。ZL200810057092.1公开了一种通过加入聚磷酸铵、硼酸锌、纳米无机物、白炭黑等,制备出一种耐油、耐热的膨胀型阻燃橡胶。ZL96116942.7公开了一种以无卤阻燃剂氢氧化铝(镁)、三氧化二锑和磷系阻燃剂相互配合使用,通过混炼共混工艺,制备出低烟、低毒、阻燃性能好的环保型阻燃橡胶地板。ZL201010136235.5公开了一种采用有机磷系阻燃剂三芳基磷酸酯和有机改性纳米蒙脱土复配制备的高效、环保型阻燃剂,并以10~15wt%添加量应用到天然橡胶体系中,制备绿色环保阻燃橡胶材料。CN102040779A公开了一种以含有三元乙丙生胶、异氰酸酯封端的聚丁二烯、硫化剂、氢氧化物阻燃剂的混合物,通过混炼、硫化得到一种阻燃橡胶。CN 1324885A公开了一种采用甲基丙烯酸(MAA)或丙烯酸(AA)等不饱和羧酸改性无机阻燃填料,制备阻燃性能优良的无卤阻燃橡胶材料。谭海生等采用丙烯基氯和甲基丙烯酸甲酯接枝改性天然胶乳后,制得了阻燃性能和力学性能优良的接枝聚合物《AC / MMA接枝改性天然胶乳的制备及性能...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K9/10C08K9/04C08K7/24C08K3/04C08F279/02C08F230/02
Inventor 徐典宏梁滔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