CN105384983B - 一种nvh减震器用抗o3老化橡胶材料及其制备方法 - Google Patents

一种nvh减震器用抗o3老化橡胶材料及其制备方法 Download PDF

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CN105384983B
CN105384983B CN201510873141.9A CN201510873141A CN105384983B CN 105384983 B CN105384983 B CN 105384983B CN 201510873141 A CN201510873141 A CN 201510873141A CN 105384983 B CN105384983 B CN 105384983B
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王世明
程升福
代甫容
彭正碧
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SICHUAN LONGSHENG KEFA INDUSTRIAL Co Ltd
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29B7/283—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control measuring data of the driving system, e.g. torque, speed, power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
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Abstract

本发明公开了一种NVH减震器用抗O3老化橡胶材料，包括以下重量份数的组分：异戊二烯共聚体40‑80份、乙烯‑醋酸乙烯酯共聚体20‑60份、二硫化二吗啉0.06‑0.18份、过氧化二异丙苯0.55‑1.7份、2‑巯基苯并咪唑0.4‑0.8份。制备方法包括以下步骤：(1)聚合：将异戊二烯共聚体投入聚合釜，120±2℃搅拌2‑3min，温度升至150±2℃时加入乙烯‑醋酸乙烯酯共聚体，搅拌2‑3min，接着加入二硫化二吗啉、过氧化二异丙苯搅拌90‑100min，温度降至低于120±2℃时加入2‑巯基苯并咪唑，搅拌2‑3min；(2)排胶；(3)压片。制备出的产品抗O3老化性能好。

Description

一种NVH减震器用抗O3老化橡胶材料及其制备方法
技术领域
本发明属于化工橡胶材料领域，具体涉及一种NVH减震器用抗O3老化橡胶材料及其制备方法。
背景技术
随着科技的进步以及人们生活标准的提高，人们对现代汽车的要求也越来越高，如安全、舒适、性价比高等，而做好减震工作则能很好的提高汽车的行驶舒适性及安全性。汽车的减震措施有很多，如提高NVH(Noise、Vibration、Harshness，即噪声、振动和不舒适性)减震器的性能，其中减震橡胶制品起着最重要的作用。但现有NVH减震器用橡胶材料为NR(天然橡胶)，在抗O3老化条件：O3浓度50pphm、温度40℃、静态拉伸20％，8h左右就出现龟裂现象，随着时间延长，龟裂加剧，48h左右就基本断裂，远远达不到标准要求因此，现有NVH减震器用橡胶材料存在的抗O3老化性差问题，导致产品降噪、减震、舒适性差及使用寿命短。
发明内容
本发明针对上述不足之处而提供的一种NVH减震器用抗O3老化橡胶材料及其制备方法，本发明采用价廉的异戊二烯共聚体与乙烯-醋酸乙烯酯共聚体，在二硫化二吗啉引发下，聚合剂过氧化二异丙苯使两种共聚体进一步聚合，再加入2-巯基苯并咪唑提高其抗老化性，最终得到抗O3老化能力强的橡胶材料(LSIER橡胶)。
为实现上述目的，本发明解决其技术问题所采用的技术方案是：
一种NVH减震器用抗O3老化橡胶材料，包括以下组分且各组分的重量份数为：异戊二烯共聚体40-80份、乙烯-醋酸乙烯酯共聚体20-60份、二硫化二吗啉0.06-0.18份、过氧化二异丙苯0.55-1.7份、2-巯基苯并咪唑0.4-0.8份。
进一步地，一种NVH减震器用抗O3老化橡胶材料，包括以下组分且各组分的重量份数为：异异戊二烯共聚体50-60份、乙烯-醋酸乙烯酯共聚体40-50份、二硫化二吗啉0.12-0.15份、过氧化二异丙苯1.12-1.4份、2-巯基苯并咪唑0.6-0.7份。
一种NVH减震器用抗O3老化橡胶材料的制备方法，包括以下步骤：
(1)聚合：将异戊二烯共聚体投入聚合釜，120±2℃搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，然后将温度升至150±2℃时加入乙烯-醋酸乙烯酯共聚体，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，接着加入二硫化二吗啉、过氧化二异丙苯搅拌90-100min，最后将温度降至低于120±2℃时加入2-巯基苯并咪唑，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2；
(2)排胶：温度为120±2℃，转速为75-85r/min，排除聚合后的物质；
(3)压片：在22寸开炼机中压片，温度40-60℃，辊距为5-7mm，时间为3-5min，压片后自然冷却。
本发明提供的一种NVH减震器用抗O3老化橡胶材料及其制备方法，具有以下几种有益效果：
(1)本发明原料成本低廉，制备过程简单，适于工业化生产。
(2)本发明制备的产品抗O3老化性能好，耐用。
具体实施方式
实施例
组分 实施例1 实施例2 实施例3 实施例4 实施例5
异戊二烯共聚体 40 50 60 70 80
乙烯-醋酸乙烯酯共聚体 60 50 40 30 20
二硫化二吗啉 0.18 0.15 0.12 0.09 0.06
过氧化二异丙苯 1.68 1.4 1.12 0.84 0.56
2-巯基苯并咪唑 0.8 0.7 0.6 0.5 0.4
一种NVH减震器用抗O3老化橡胶材料的制备方法，包括以下步骤：
(1)聚合：将异戊二烯共聚体投入聚合釜，120±2℃搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，然后将温度升至150±2℃时加入乙烯-醋酸乙烯酯共聚体，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，接着加入二硫化二吗啉、过氧化二异丙苯搅拌90-100min，最后将温度降至低于120±2℃时加入2-巯基苯并咪唑，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2；
(2)排胶：温度为120±2℃，转速为75-85r/min，排除聚合后的物质；
(3)压片：在22寸开炼机中压片，温度40-60℃，辊距为5-7mm，时间为3-5min，压片后自然冷却。
实验例
分别使用本发明制备的橡胶材料和天然橡胶材料制备橡胶，对比配方组分及重量配比份数如下：
橡胶制备过程：
(1)炼胶：使用设备为开炼机
(2)试片硫化工艺：使用设备为硫化机，硫化压力为12-13MPa，温度150±2℃，时间15±0.5min，装胶量：45±1g，每次压制4张标准试片。
分别使用本发明制备的橡胶材料和天然橡胶材料制备橡胶试片，对橡胶试片进行物理机械性能比较：
依据上表，本发明提供的橡胶材料与NR的试片物理机械性能对比，NVH减震器用抗O3老化橡胶材料最佳配方为：
组分 重量份数
异戊二烯共聚体 50～60
乙烯-醋酸乙烯酯共聚体 40～50
二硫化二吗啉 0.12～0.15
过氧化二异丙苯 1.12～1.4
2-巯基苯并咪唑 0.6～0.7
(3)NVH减震器硫化工艺：
使用以上最佳配方制备NVH减震器，使用设备为300T注射硫化机，硫化压力为18MPa，温度160℃，时间12min，装胶量：110g。
分别使用本发明LSIER橡胶和NR橡胶制得的NVH减震器，其物理机械性能比较如下：
综上所述，采用本发明提供的LSIER橡胶材料生产的NVH减震器，在抗O3老化方面，性能得到显著提升。

Claims (2)

1.一种NVH减震器用抗O3老化橡胶材料，其特征在于，包括以下组分且各组分的重量份数为：异戊二烯共聚体40份、乙烯-醋酸乙烯酯共聚体60份、二硫化二吗啉0.06-0.18份、过氧化二异丙苯0.55-1.7份、2-巯基苯并咪唑0.4-0.8份。
2.如权利要求1所述的NVH减震器用抗O3老化橡胶材料的制备方法，其特征在于，包括以下步骤：
(1)聚合：将异戊二烯共聚体投入聚合釜，120±2℃搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，然后将温度升至150±2℃时加入乙烯-醋酸乙烯酯共聚体，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2，接着加入二硫化二吗啉、过氧化二异丙苯搅拌90-100min，最后将温度降至低于120±2℃时加入2-巯基苯并咪唑，搅拌2-3min，转速为75-85r/min，压力为5.8-6.2kgf/cm2；
(2)排胶：温度为120±2℃，转速为75-85r/min，排除聚合后的物质；
(3)压片：在22寸开炼机中压片，温度40-60℃，辊距为5-7mm，时间为3-5min，压片后自然冷却。
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CN107964243A (zh) * 2017-12-15 2018-04-27 洛阳名力科技开发有限公司 一种用于制造减震装置的橡胶材料

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CN102827404A (zh) * 2012-09-17 2012-12-19 上海众力汽车部件有限公司 一种汽车用减震制品橡胶组合物
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