CN108165351A - 一种高低温仪表油组合物及其制备方法 - Google Patents
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Abstract
本发明公开了一种高低温仪表油组合物,包括以下质量百分比的组分:乙基硅油56.8~94.78%,双酯基础油5~40%,抗氧剂0.1~2%,防锈剂0.1~1%,金属减活剂0.02~0.2%,本发明还公开了高低温仪表油组合物的制备方法。本发明提供的高低温仪表油,具有极佳的低温性能,可以在‑70℃的极寒地区或天空中使用,比现有技术的仪表油低温降低了10℃左右。本发明提供的高低温仪表油还具有良好的高温性、润滑性、防护性和极长的使用寿命。本发明提供的高低温仪表油可用于各种航天、航空仪表轴承、微型电机轴承、执行机构齿轮和极寒地区使用的精密仪表。
Description
技术领域
本发明涉及一种仪表油及其制备方法,具体是一种高低温仪表油组合物及其制备方法。
背景技术
仪表作为计数、计量、计时等功能的器具,广泛应用于各个工业领域。其具有体积小、精度高、负荷低、工作温度范围宽、使用寿命长等特点。
为满足仪表的精准工作,对仪表油就有如下要求:
1)优秀的抗磨性和低的摩擦系数,能够对仪表的轴承、传动机构提供良好的润滑;
2)优异的高温稳定性和粘温性,极低的倾点,低温启动力矩低,保证仪表能在各种温度下正常工作;
3)良好的抗氧化安定性和低的蒸发损失,能够提供与仪表等同的使用寿命;
4)适宜的粘度,既不影响仪表的正常运动,又具有抗流散性,对仪表轴承等部件能够提供持续的润滑;
5)良好的防锈防腐蚀性,使仪表能长期稳定运行。
目前,市售的仪表油主要有两大类,一类是基于精制矿物型基础油的仪表油,其使用温度能达到-40℃~+120℃,另一类是基于合成型基础油的仪表油,其使用温度能达到-60℃~+120℃。如CN1369542A公开的一种汽车地平仪用仪表油组合物,是采用矿物油和合成油为基础油,其使用温度范围为-40℃~+120℃。而CN1043523A公开的仪表油用二元羧酸双酯组合物,其采用合成双酯基础油,使用温度范围为-60℃~+120℃。对于-70℃~+150℃更宽温度范围的高低温仪表油,未见有国内外的文献报告。
发明内容
针对现有技术仪表油使用温度范围不宽的缺点,本发明的第一个目的在于提供了一种高低温仪表油组合物,其具有优异的高低温性能,其使用温度范围达到-70℃~+150℃,并且有极低的倾点和低温启动力矩,保证仪表能在极寒地区和天空中使用。同时还具有良好的抗磨性和低的摩擦系数、优秀的抗氧化安定性和低的蒸发损失、良好的防锈防腐性和抗流散性,具有极长的使用寿命,适用于南北极等极寒地区和航天航空的各种精密仪表轴承、齿轮等的润滑和防护。
本发明的第二个目的是提供上述高低温仪表油组合物的制备方法。
本发明的第一个目的是通过以下技术方案来实现:
一种高低温仪表油组合物,包括以质量百分比的组分:
如上所述的高低温仪表油组合物,所述的乙基硅油,采用乙基硅氧烷和乙基环体经过聚合、精馏、后处理和过滤工艺而得到的一种乙基硅油,其分子式:
结构式:
其中n=2~40,
其技术指标范围:
本发明采用满足上述技术指标的乙基硅油作为仪表油的主要组分,具有如下优势:
1)倾点低,其倾点均在-70℃以下,低温流动性好,低温启动力矩低,适应于极低温环境下(-70℃)仪表的正常工作;
2)乙基硅油自身结构稳定,对大多数金属和非金属材料均兼容,具有良好的兼容性;
3)低蒸发损失,优秀的化学稳定性和氧化安定性,具有极长的使用寿命。
如上所述的高低温仪表油,所述的双酯基础油,采用癸二酸二(2-乙基己基)酯,壬二酸二(2-乙基己基)酯和乙二酸二(2-乙基己基)酯中的一种,其技术指标范围:
本发明采用满足上述技术指标的双酯基础油作为仪表油的第二个组分,其作用如下:
1)提高仪表油抗氧剂、防锈剂、金属减活剂的溶解能力;
2)二元酸双酯是一种天然的油性剂,可提供优秀的抗磨减摩性,为仪表提供持续的润滑,可补偿乙基硅油润滑性差的缺陷;
3)提高仪表油的抗氧化安定性。
将其用量控制在5~40%,即可满足高低温仪表油的润滑要求。
如上所述的高低温仪表油,所述的抗氧剂采用酚型或胺型抗氧剂中的一种或两种的混合,所述的酚型抗氧剂采用2,6-二叔丁基对甲酚(T501)或4,4'-甲基双酚,所述的胺型抗氧剂采用N-苯基-α-萘胺,N-苯基-β-萘胺、辛基丁基二苯胺或二异辛基二苯胺。
抗氧剂的主要作用:
1)提高高低温仪表油的氧化安定性,确保仪表油在高低温环境下的长期使用;
2)控制仪表油沉积物和絮状物的产生,保证仪表精准工作。
将抗氧剂的用量控制在0.1~2%,即可满足高低温仪表油的氧化安定性要求。
如上所述的高低温仪表油,所述的防锈剂采用机羧酸和有机酯型防锈剂中的一种或两种的混合,所述的有机羧酸采用十二烯基丁二酸或十六烯基丁二酸,所述的有机酯型防锈剂采用山梨糖醇酐单油酸脂,其作用在提高高低温仪表油的防锈性,其具体表现如下:
1)防锈剂分子中的极性基团对金属表面有很强的吸附力,在金属表面形成紧密的单分子或多分子保护层,阻止氧、硫等腐蚀介质与仪表的金属接触,起到防锈作用;
2)采用有机羧酸和有机酯型防锈剂,与传统的磺酸盐等防锈剂相比,可减少沉积物的产生,同时更为环保。
将其用量控制在0.1~1%的范围,即可满足高低温仪表油的防锈要求。
如上所述的高低温仪表油所述的金属减活剂,采用苯三唑及其衍生物或噻二唑衍生物中的一种或两种的混合。所述的苯三唑及其衍生物采用苯并三氮唑(T706)或苯并三氮唑衍生物(T551),所述的噻二唑衍生物采用2,5-二硫基-1,3,4-噻二唑衍生物(T561)。
上述金属减活剂的作用如下:
1)金属减活剂可以在金属表面生成化学膜,防止金属或金属离子进入仪表油,以减弱对仪表油所产生的催化氧化作用,可以提高仪表油的寿命;
2)可以防止有机酸和磷硫化合物对有色金属,如铜、银等金属的腐蚀,可以延长仪表的使用寿命。
将金属减活剂的用量控制在0.02~0.2%的范围内,即可满足仪表油的防腐蚀要求。
本发明的第二个目的是通过以下技术措施来实现:
一种高低温仪表油组合物的制备方法,包括如下步骤:
1、先是将乙基硅油和双酯基础油一起加入反应釜中,加热升温搅拌110±5℃,抽真空度至-0.05MPa,保持恒温恒真空脱水30~120分钟;
2、然后依次加入抗氧剂、防锈剂、金属减活剂,搅拌15±5分钟,再降温至60±5℃,通过精密袋式过滤器(≤1μm)过滤2次,即得到所述高低温仪表油组合物。
与现有技术相比,本发明具有的优点如下:
1、本发明提供的高低温仪表油,与现有技术的仪表油相比,具有更宽的使用温度范围,其使用温度范围为-70~+150℃(现有技术的仪表油为-60~+120℃);
2、本发明提供的高低温仪表油,低蒸发损失、高闪点,具有优秀的化学稳定性和氧化安定性,与现有技术的仪表油相比,具有更长的使用寿命;
3、本发明提供的高低温仪表油,具有更好的材料兼容性,与绝大数的金属和非金属材料兼容,还具有优良的抗磨减摩性和抗流散性。
具体实施方式
下面将结合具体实施例,对本发明中的技术方案进行清楚、完整的描述,然而本发明的保护范围并非仅仅局限于以下实施例。
实施例一
1)先将89.35千克的乙基硅油(V50=16.85mm2/s)和10千克的癸二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至110±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水60±5分钟;
2)依次加入0.3千克的2,6-二叔丁基对甲酚、0.1千克的N-苯基-α萘胺、0.2千克的十二烯基丁二酸和0.05千克的苯并三氮唑,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例二
1)先将94.4千克的乙基硅油(V50=13.73mm2/s)和5千克的己二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至110±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水45±5分钟;
2)依次加入0.1千克的2,6-二叔丁基对甲酚,0.2千克的N-苯基-β-萘胺,0.2千克的山梨糖醇酐单油酸酯和0.1千克苯并三氮唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例三
1)先将148.2千克的乙基硅油(V50=20.21mm2/s)和50千克的癸二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至120℃±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水60±5分钟;
2)依次加入0.4千克的4,4'-甲基双酚,0.7千克的辛基丁基二苯胺,0.2千克的十二烯基丁二酸和0.2千克山梨糖醇酐单油酸酯,0.1千克的苯并三氮唑和0.2千克的2,5-二硫基-1,3,4-噻二唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例四
1)先将421.5千克的乙基硅油(V50=39.28mm2/s)和75千克的己二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至110±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水75±5分钟;
2)依次加入1千克2,6-二叔丁基对甲酚和0.5千克的二异辛基二苯胺,1千克十二烯基丁二酸和0.5千克的山梨糖醇酐单油酸酯,0.5千克苯并三氮唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例五
1)先将92.05千克的乙基硅油(V50=79.81mm2/s)和7.5千克的壬二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至110±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水35±5分钟;
2)依次加入0.2千克N-苯基-α-萘胺,0.15千克十二烯基丁二酸、0.05千克苯并三氮唑和0.05千克2,5-二硫基-1,3,4-噻二唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例六
1)先将89.5千克的乙基硅油(V50=24.28mm2/s)和10千克的壬二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至120℃±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水60±5分钟;
2)依次加入0.2千克N-苯基-β-萘胺,0.2千克山梨糖醇酐单油酸酯、0.1千克苯并三氮唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
实施例七
1)先将182.66千克的乙基硅油(V50=16.78mm2/s)和16千克的己二酸二(2-乙基己基)酯一起加入反应釜中,加热升温搅拌至110±5℃,抽真空至-0.05MPa,保持恒温恒真空脱水60±5分钟;
2)依次加入0.3千克4,4-甲基双酚,0.2千克二异辛基二苯胺,0.4千克十六烯基丁二酸、0.3千克山梨糖醇酐单油酸酯、0.1千克苯并三氮唑和0.04千克2,5-二硫基-1,3,4-噻二唑衍生物,搅拌15±5分钟,再降温至60±5℃;
3)通过精度为1μm的袋式过滤器过滤2次,即得高低温仪表油。
将上述实施例所得的高低温仪表油的技术参数列入表1中,从表1可知,本发明提供的高低温仪表油,具有更宽的使用温度范围,其使用温度范围为(-70~+150℃),具有蒸发损失小、闪点高,具有优良的抗磨减摩性和抗流散性、优秀的化学稳定性和氧化安定性以及极长的使用寿命。
表1.实施例一~七高低温仪表油的技术参数
Claims (7)
1.一种高低温仪表油组合物,其特征在于,包括以下质量百分比的组分:
2.如权利要求1所述的高低温仪表油组合物,其特征在于,所述的乙基硅油采用六乙基硅氧烷和乙基环体聚合得到的一种乙基硅油,其分子式:
结构式:
其中n=2~40,
其技术指标范围:
3.如权利要求1所述的高低温仪表油组合物,其特征在于,所述的双酯基础油采用癸二酸二(2-乙基己基)酯、壬二酸二(2-乙基己基)酯、己二酸(2-乙基己基)酯中的一种。
4.如权利要求1所述的高低温仪表油组合物,其特征在于,所述的抗氧剂为酚型抗氧剂和胺型抗氧剂中的一种或两种的混合,所述的酚型抗氧剂采用2,6-二叔丁基对甲酚(T501)或4,4'-甲基双酚,所述的胺型抗氧剂采用N-苯基-α-萘胺,N-苯基-β-萘胺、辛基丁基二苯胺或二异辛基二苯胺。
5.如权利要求1所述的高低温仪表油组合物,其特征在于,所选的防锈剂为有机羧酸和有机酯型防锈剂中的一种或两种的混合,所述的有机羧酸采用十二烯基丁二酸或十六烯基丁二酸,所述的有机酯型防锈剂采用山梨糖醇酐单油酸脂。
6.如权利要求1所述的高低温仪表油组合物,其特征在于,所述的金属减活剂为苯并三氮唑及其衍生物或者噻二唑衍生物中的一种或两种的混合,所述的苯三唑及其衍生物采用苯并三氮唑或苯并三氮唑衍生物,所述噻二唑衍生物采用2,5-二硫基-1,3,4-噻二唑衍生物。
7.一种如权利要求1~6中任一权利要求所述高低温仪表油组合物的制备方法,其特征包括如下步骤:
1)先将乙基硅油和双脂基础油一起加入反应釜中,加热升温搅拌至110 5℃,抽真空到-0.05MPa,保持恒温恒真空脱水30~120分钟;
2)然后依次加入抗氧剂、防锈剂、金属减活剂,搅拌15 5分钟,再降温至60 5℃,经过精密过滤器过滤,即得到所述高低温仪表油组合物。
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