CN104893021A - 巨型工程机械轮胎的耐热肩垫胶 - Google Patents
巨型工程机械轮胎的耐热肩垫胶 Download PDFInfo
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Abstract
本发明公开了一种巨型工程机械轮胎耐热肩垫胶,按重量份计由下述组分构成:天然橡胶100份;N330炭黑25~35份;白炭黑10~20份;硅烷偶联剂1~3份;氧化锌3~7份;硬脂酸1~3份;防老剂4010NA 1~3份;防老剂RD 1~3份;硫磺1~3份;硫化剂DTDM 0.4~1.2份;促进剂CZ 0.6~1.2份;防焦剂CTP 0.1~0.5份。按本发明所述配方制得的胶料在满足降低胶料生热的同时具有优良的耐热老化性能。
Description
技术领域
本发明涉及一种巨型工程机械轮胎的耐热肩垫胶,属于轮胎制造技术领域。
背景技术
巨型工程机械轮胎一般在大型露天矿山使用,热带地区或夏天的矿山地表温度高达70~80℃,再加上巨型工程机械轮胎负荷大、运距长、转弯多,24小时连续作业的特点,导致生热大。已有的研究表明,如果轮胎温度超过121℃胶料强度降到室温下的55%左右,界面粘合强度降到室温下的53%。因此,如果长时间在此高温下使用,易导致轮胎肩空造成轮胎报废。如何降低肩垫胶的生热和提高肩垫胶的耐热性能是提高巨型工程机械轮胎质量的关键技术之一。因此开发一种耐热肩垫胶显得尤为重要。由于生产巨型工程机械轮胎的技术含量大,工艺复杂,目前在国内能生产巨型工程机械轮胎的厂家屈指可数,特别是针对巨型工程机械轮胎的耐热肩垫胶的研究更少。
发明内容
本发明要解决的技术问题是提供一种巨型工程机械轮胎的耐热肩垫胶。该肩垫胶胶料在满足降低胶料生热的同时具有优良的耐热老化性能。
本发明所述的巨型工程机械轮胎的耐热肩垫胶,按重量份计由下述组分构成:
天然橡胶,100份;
N330炭黑,25~35份;
白炭黑,10~20份;
硅烷偶联剂,1~3份;
氧化锌,3~7份;
硬脂酸,1~3份;
N-异丙基-N-苯基对苯二胺(防老剂4010NA),1~3份;
2,2,4-三甲基-1,2-二氢化喹啉聚合体(防老剂RD),1~3份;
硫磺,1~3份;
二硫化二吗啡啉(硫化剂DTDM),0.4~1.2份;
N-环已基-2-苯并噻唑基次磺酰胺(促进剂CZ),0.6~1.2份;
N-环己基硫代邻苯二甲酰亚胺(防焦剂CTP),0.1~0.5份。
上述各组分的重量配比优选为:
天然橡胶,100份;
N330炭黑,25~30份;
白炭黑,10~15份;
硅烷偶联剂,1~2.5份;
氧化锌,5~7份;
硬脂酸,1~2份;
N-异丙基-N-苯基对苯二胺,1.5~3份;
2,2,4-三甲基-1,2-二氢化喹啉聚合体,1~2份;
硫磺,1.5~2份;
二硫化二吗啡啉:0.5~1份;
N-环已基-2-苯并噻唑基次磺酰胺,0.6~1份;
N-环己基硫代邻苯二甲酰亚胺,0.3~0.5份。
上述技术方案中,
所述的天然橡胶为2#烟片胶和/或3#烟片胶。当所用的天然橡胶为2#烟片胶和3#烟片胶的混合物时,2#烟片胶与3#烟片胶的配比可以是任意配比。
优选采用氮吸附比表面积为146~185m2/g的白炭黑。
所述的硅烷偶联剂优选为硅69(双-[γ-(三乙氧基硅)丙基]四硫化物)。
本发明所述的巨型工程机械轮胎的耐热肩垫胶采用现用常规方法制备。所得的橡胶胶料的性能如表1所示:
表1:
性能参数 | 单位 | 性能范围 |
硬度(邵尔A) | 度 | 55~70 |
300%定伸强力 | MPa | 12~16 |
拉伸强度 | MPa | 26~30 |
扯断伸长率 | % | 450~550 |
撕裂强度 | kN/m | 110~150 |
固特里奇生热 | ℃ | 15~20 |
与现有技术相比,本发明以N330炭黑、白炭黑和硅69并用以起到显著改善胶料的生热性能,并以防老剂4010NA与防老剂RD并用的耐热防老剂体系、同时选定由硫黄、硫化剂DTDM和促进剂CZ组成的半有效硫化体系以增强胶料耐热老化性能,使所得肩垫胶胶料在满足降低胶料生热的同时具有优良的耐热老化性能。
具体实施方式
下面结合具体实施例对本发明作进一步的详述,以更好地理解本发明的内容,但本发明并不限于以下实施例。
实施例1
按以下表2中指定的各组分进行炼胶,制备方法:
1)按配方称取其中的天然橡胶、N330炭黑、白炭黑、硅烷偶联剂、氧化锌、硬脂酸、防老剂4010NA和防老剂RD投入橡胶密炼机(转子转速为40r/min),在160℃条件下以40r/min的转速混炼4.5min,得到混炼胶A;
2)按配方称取其中的硫磺、硫化剂DTDM、促进剂CZ和防焦剂CTP,投入橡胶密炼机中与混炼胶A混合,在100℃条件下以20r/min的转速混炼3.5min,即得到巨型工程机械轮胎的耐热肩垫胶。
对所得的胶料进行性能测试,在表2中列出了测试结果。
实施例2:
按以下表2中指定的各组分进行炼胶,胶料的制备方法同实施例1。
对所得的胶料进行性能测试,在表2中列出了测试结果。
实施例3:
按以下表2中指定的各组分进行炼胶,胶料的制备方法同实施例1。
对所得的胶料进行性能测试,在表2中列出了测试结果。
实施例4:
按以下表2中指定的各组分进行炼胶,胶料的制备方法同实施例1。
对所得的胶料进行性能测试,在表2中列出了测试结果。
实施例5:
按以下表2中指定的各组分进行炼胶,胶料的制备方法同实施例1。
对所得的胶料进行性能测试,在表2中列出了测试结果。
表2(以下各原材料的用量均为重量份)
Claims (5)
1.巨型工程机械轮胎的耐热肩垫胶,按重量份计由下述组分构成:
天然橡胶,100份;
N330炭黑,25~35份;
白炭黑,10~20份;
硅烷偶联剂,1~3份;
氧化锌,3~7份;
硬脂酸,1~3份;
N-异丙基-N-苯基对苯二胺,1~3份;
2,2,4-三甲基-1,2-二氢化喹啉聚合体,1~3份;
硫磺,1~3份;
二硫化二吗啡啉,0.4~1.2份;
N-环已基-2-苯并噻唑基次磺酰胺,0.6~1.2份;
N-环己基硫代邻苯二甲酰亚胺,0.1~0.5份。
2.根据权利要求1所述的巨型工程机械轮胎的耐热肩垫胶,其特征在于:各组分的重量份为:
天然橡胶,100份;
N330炭黑,25~30份;
白炭黑,15~20份;
硅烷偶联剂,1.5~3份;
氧化锌,5~7份;
硬脂酸,1~2份;
N-异丙基-N-苯基对苯二胺,2~3份;
2,2,4-三甲基-1,2-二氢化喹啉聚合体,1~2份;
硫磺,1.0~2份;
二硫化二吗啡啉:0.5~1份;
N-环已基-2-苯并噻唑基次磺酰胺,0.6~1份;
N-环己基硫代邻苯二甲酰亚胺,0.3~0.5份。
3.根据权利要求1或2所述的巨型工程机械轮胎的耐热肩垫胶,其特征在于:所述的天然橡胶为2#烟片胶和/或3#烟片胶。
4.根据权利要求1或2所述的巨型工程机械轮胎的耐热肩垫胶,其特征在于:所述白炭黑的氮吸附比表面积为146~185m2/g。
5.根据权利要求1或2所述的巨型工程机械轮胎的耐热肩垫胶,其特征在于:所述的硅烷偶联剂为硅69。
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CN109679157A (zh) * | 2018-12-11 | 2019-04-26 | 贵州轮胎股份有限公司 | 一种斜交重卡轮胎用胎面基部胶料 |
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CN103642081A (zh) * | 2013-12-09 | 2014-03-19 | 中国化工橡胶桂林轮胎有限公司 | 巨型斜交工程机械轮胎耐热胎面胶 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109679157A (zh) * | 2018-12-11 | 2019-04-26 | 贵州轮胎股份有限公司 | 一种斜交重卡轮胎用胎面基部胶料 |
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