CN112239690A - Cd柴油机油组合物及其用途 - Google Patents

Cd柴油机油组合物及其用途 Download PDF

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CN112239690A
CN112239690A CN201910647066.2A CN201910647066A CN112239690A CN 112239690 A CN112239690 A CN 112239690A CN 201910647066 A CN201910647066 A CN 201910647066A CN 112239690 A CN112239690 A CN 112239690A
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魏真
叶芸星
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Abstract

本发明涉及一种CD柴油机油组合物及其用途，主要解决现有技术中CD柴油机油组合物用于车辆柴油机系统中，存在高温下抗氧化性能、清净性能不足的问题。本发明组合物以重量份数计，包括以下组份：a)2～5份金属清净剂；b)1～5份聚异丁烯丁二酰亚胺无灰分散剂；c)0.1～1份二烷基二硫代磷酸盐；d)0.1～1份复合抗氧剂，所述复合抗氧剂为丁基/异辛基二苯胺和2,6‑二叔丁基对甲酚的混合物；e)87～95份基础油。

Description

CD柴油机油组合物及其用途
技术领域
本发明涉及一种用于CD柴油机油组合物及其用途。
背景技术
汽车在城市中行驶时，由于高低速交叉行驶，会同时造成高温积炭及低温油泥，这些氧化物质会导致油路堵塞、活塞环磨损等等问题。提升油品的抗氧性能、清净性能有助于减少氧化物质的生成量，同时降低氧化物质在发动机表面的成焦倾向，从而起到延长油品寿命，减少发动机磨损的作用。
文献CN103710077B公开了一种满足CD油品级别的柴油机油组合物。文献CN102533410B公开了一种可以在发动机缸体内和活塞环上形成超硬耐磨层的柴油机油组合物。
上述文献的CD柴油机油组合物用于车辆柴油机系统中，均存在高温下抗氧性能、清净性能不足的问题。
发明内容
本发明所要解决的技术问题之一是现有技术中CD柴油机油组合物用于车辆柴油机系统中，存在高温下抗氧化性能、清净性能不足的问题，提供一种新的CD柴油机油组合物。本发明所要解决的技术问题之二是提供一种与解决技术问题之一相对应的CD柴油机油组合物的用途。使用所述CD柴油机油组合物，在保持CD柴油机油原有性能的同时，提升了油品的抗氧化性能和清净性能，延长油品使用寿命并降低油品在金属表面的结焦倾向。
为解决上述技术问题之一，本发明采用的技术方案如下：一种CD柴油机油组合物，以重量份数计，包括以下组份：
a)2～5份金属清净剂，所述金属清净剂由以下组分组成：
a1)碱值为290～310mgKOH的超高碱值酚盐；
a2)碱值为380～420mgKOH/g的超高碱值磺酸盐；
a3)碱值为25～35mgKOH/g的低碱值磺酸盐；
b)1～5份聚异丁烯丁二酰亚胺无灰分散剂；
c)0.1～1份二烷基二硫代磷酸盐；
d)0.1～1份复合抗氧剂，所述复合抗氧剂为丁基/异辛基二苯胺和2,6-二叔丁基对甲酚的混合物；
e)87～95份基础油，所述基础油选自溶剂精制矿物基础油、加氢精制矿物基础油、聚α-烯烃合成油或聚酯类合成油中的至少一种。
上述技术方案中，以重量份数计，所述CD柴油机油组合物中还包括组份f)0.5～10份的黏度指数改进剂；所述黏度指数改进剂选自聚甲基丙烯酸酯(PMA)、乙丙共聚物(OCP)、聚异丁烯(PIB)和氢化苯乙烯异戊二烯共聚物(HSD)中的至少一种。
上述技术方案中，以重量份数计，所述CD柴油机油组合物中还包括组份g)0.1～1.0份的降凝剂；所述降凝剂选自聚甲基丙烯酸酯(PMA)、烷基萘和聚α-烯烃中的至少一种。
上述技术方案中，以重量份数计，所述CD柴油机油组合物中还包括组份i)0.001～0.2份的抗泡剂；所述抗泡剂选自硅油型、非硅型和复合抗泡剂中的至少一种。
为解决上述技术问题之二，本发明采用的技术方案如下：所述的CD柴油机油组合物用于车辆柴油机系统。
上述技术方案中，所述CD柴油机油组合物的组份、重量份数以及优选范围与解决技术问题之一所采取的技术方案中的相同。
本发明组合物的制备方法为：将各组份按比例在50～65℃温度下加入基础油中，搅拌0.5～5小时，使其全部溶解，即可得到本发明的组合物。
本发明CD柴油机油组合物采用a1)碱值为290～310mgKOH的超高碱值酚盐；a2)碱值为380～420mgKOH/g的超高碱值磺酸盐；以及a3)碱值为25～35mgKOH/g的低碱值磺酸盐复配，明显改善油品抗氧、清净性能，可以延长油品使用寿命并降低油品在金属表面的结焦倾向，取得了较好的技术效果。
本发明中所述清净剂的碱值按照SH/T 0251-1993《石油产品碱值测定法(高氯酸电位滴定法)》进行测定。
本发明组合物的性能由TEOST高温氧化实验和曲轴箱模拟实验以及氧化诱导期进行评定。
TEOST实验是按照ASTM D7097-06a《发动机油适度高温活塞沉积物的测定热氧化模拟试验法(TEOST MHT)》方法对试验油品进行24小时的氧化实验，试验温度为285℃。试验结果为生成的沉积物质量，沉积物质量越小，油品性能越好。
曲轴箱模拟实验是按照SH/T 0300-06《曲轴箱模拟试验法》对油品在320℃板温、150℃油温条件下进行3小时试验。试验结果为成焦板增重量，增重量越小，油品性能越好。
氧化诱导期实验是按照SH/T 0719-2002《润滑油氧化诱导期测定法(压力差式扫描量热法)》测定油品在规定的温度和氧气压力下氧化放热反应的拐点时间。实验条件为190℃、3.5MPa。
下面通过实施例对本发明作进一步的阐述。
具体实施方式
【实施例1～4】
将各组份按比例在65℃下加入基础油中，搅拌0.5～5小时使其全部溶解，得到本发明CD柴油机油组合物。配方中超高碱值磺酸钙碱值为400mgKOH超高碱值硫化烷基酚碱值为300mgKOH。具体见表1。
【比较例1】
同【实施例1】，只是将配方中的超高碱值硫化烷基酚钙等碱值替换为高碱值硫化烷基酚钙，其碱值为250mgKOH。具体见表1。
【比较例2】
同【实施例1】，只是将配方中的超高碱值磺酸钙等碱值替换为高碱值磺酸钙，其碱值为300mgKOH。具体见表1。
【比较例3】
同【实施例1】，只是将配方中的超高碱值硫化烷基酚钙等剂量替换为高碱值硫化烷基酚钙，其碱值为250mgKOH。具体见表1。
【比较例4】
同【实施例1】，只是将配方中的超高碱值磺酸钙等剂量替换为高碱值磺酸钙，其碱值为300mgKOH。具体见表1。
【比较例5】
同【实施例1】，只是将配方中的超高碱值硫化烷基酚钙等剂量替换为中碱值硫化烷基酚钙，其碱值为150mgKOH。具体见表1。
表1
Figure BDA0002133933820000051
将表1中的CD柴油机油组合物进行油品性能考察。结果见表2。
表2
样品 TEOST,mg 曲轴箱模拟试验,mg 氧化诱导期,Min
实施例1 53 40.8 25
实施例2 53.4 48.8 25
实施例3 55.4 49.6 25
实施例4 54.2 46.2 25
比较例1 65.2 67.9 21
比较例2 64.1 65.2 21
比较例3 60.2 62.3 20
比较例4 59.7 59.5 20
比较例5 68.5 74.2 20
如表2所示，本发明的CD柴油机油组合物各项试验结果远远好于比较例，说明其具备优秀的清净分散性能。

Claims (8)

1.一种CD柴油机油组合物，以重量份数计，包括以下组份：
a)2～5份金属清净剂，所述金属清净剂由以下组分组成：
a1)碱值为290～310mgKOH的超高碱值酚盐；
a2)碱值为380～420mgKOH/g的超高碱值磺酸盐；
a3)碱值为25～35mgKOH/g的低碱值磺酸盐；
b)1～5份聚异丁烯丁二酰亚胺无灰分散剂；
c)0.1～1份二烷基二硫代磷酸盐；
d)0.1～1份复合抗氧剂，所述复合抗氧剂为丁基/异辛基二苯胺和2,6-二叔丁基对甲酚的混合物；
e)87～95份基础油，所述基础油选自溶剂精制矿物基础油、加氢精制矿物基础油、聚α-烯烃合成油或聚酯类合成油中的至少一种。
2.根据权利要求1所述CD柴油机油组合物，其特征在于，以重量份数计，所述CD柴油机油组合物中还包括组份f)0.5～10份黏度指数改进剂。
3.根据权利要求2所述CD柴油机油组合物，其特征在于，所述黏度指数改进剂选自聚甲基丙烯酸酯、乙丙共聚物、聚异丁烯和氢化苯乙烯异戊二烯共聚物中的至少一种。
4.根据权利要求1-3任一所述CD柴油机油组合物，其特征在于，以重量份数计，所述CD柴油机油组合物中还包括组份g)0.1～1.0份的降凝剂。
5.根据权利要求1-4任一所述CD柴油机油组合物，其特征在于，所述降凝剂选自聚甲基丙烯酸酯、烷基萘和聚α-烯烃中的至少一种。
6.根据权利要求1-5任一所述CD柴油机油组合物，其特征在于，以重量份数计，所述CD柴油机油组合物中还包括组份i)0.001～0.2份的抗泡剂。
7.根据权利要求1-6任一所述CD柴油机油组合物，其特征在于，所述抗泡剂选自硅油型、非硅型和复合抗泡剂中的至少一种。
8.权利要求1～7任一所述的CD柴油机油组合物用于车辆柴油机系统。
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