KR0154891B1 - Fire resistant water-glycol hydraulic oil composition - Google Patents
Fire resistant water-glycol hydraulic oil compositionInfo
- Publication number
- KR0154891B1 KR0154891B1 KR1019960003102A KR19960003102A KR0154891B1 KR 0154891 B1 KR0154891 B1 KR 0154891B1 KR 1019960003102 A KR1019960003102 A KR 1019960003102A KR 19960003102 A KR19960003102 A KR 19960003102A KR 0154891 B1 KR0154891 B1 KR 0154891B1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
유압작동유 중 수글리콜계는 난연성이 우수한 특징이 있으나 사용원료가 고가인 문제가 있었다. 본 발명은 중점제로 에틸렌글리콜을 개시원료로 하여 에틸렌옥사이드와 프로필렌옥사이드를 랜덤부가 중합한 PAG(폴리알킬렌 글리콜)을 사용하므로서 원료가격을 획기적으로 낮추는 동시에 작동유 특성을 향상시키고, 기타 윤활제, 방청제, 용제와 어울려 최적의 난연 방청성이 우수한 작동유를 제공하였다.Among the hydraulic oils, the water glycol system has excellent flame retardancy, but there is a problem that the raw material is expensive. The present invention uses PAG (polyalkylene glycol) in which ethylene glycol and propylene oxide are randomly polymerized using ethylene glycol as a starting material, thereby significantly lowering raw material prices and improving hydraulic oil properties, and other lubricants, rust inhibitors, In combination with the solvent to provide a working oil with excellent flame retardant rust resistance.
Description
본 발명은 윤활유 조성물에 관한 것이며, 더욱 상세하게는 난연성 수-글리콜계 유압작동유에 관한 것이다.The present invention relates to a lubricating oil composition, and more particularly to a flame retardant water-glycol hydraulic fluid.
유압 작동유는 동력전달의 매체로서 유압장치 각 부의 윤활, 방청, 밀봉, 냉각등의 역할을 담당하며, 그 조성물에 따라 크게 석유계, 함수계 및 합성계의 3가지로 구분된다. 함수계는 다시 에멀전형과 솔루션형으로 분류되는데, 에멀전형은 광유를 포함하기 때문에 분리, 부패의 위험이 있는 것이다. 일본특개 평5-263094호는 일반식 R1-O-R2-OH(식중 R1은 탄소수 1-8의 포화 또는 불포화 탄화수소기, R2는 탄소수 2-8의 탄화수소기임)로 되는 에테르화합물을 0.1~0.3중량% 함유시켜 윤활성과 수명을 연장토록 하였으나 이 에테르화합물이 고가이므로 경제성이 극히 낮은 단점이 있었다.Hydraulic hydraulic oil is a medium for power transmission, which plays a role of lubrication, rust prevention, sealing, cooling, etc. of each hydraulic device, and is classified into three types of petroleum, hydrous, and synthetic systems depending on the composition. The functional system is again classified into emulsion type and solution type. Since emulsion type contains mineral oil, there is a risk of separation and corruption. Japanese Patent Application Laid-Open No. 5-263094 discloses an ether compound of the general formula R 1 -OR 2 -OH (wherein R 1 is a saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms and R 2 is a hydrocarbon group having 2 to 8 carbon atoms). It contained ~ 0.3% by weight to extend lubricity and lifespan. However, this ether compound was expensive and had very low economic feasibility.
본 발명은 물과 글리콜 및 수용성 중점제를 주성분으로 하여 기타 첨가제가 배합된 솔류션형으로서 상기의 염려가 없으며, 또한 난연성으로 고온안전성도 매우 우수하므로 고온의 금속, 전기스파크, 가열로등의 화재 위험성이 있는 곳에서도 사용할 수 있고, 그외에도 내마모성, 내부식성, 냉각성 및 방청성등이 뛰어난 특성을 갖도록 하는 새로운 유압작동유 조성물의 제공에 목적이 있다.The present invention is a solution type containing water, glycol, and water-soluble medium as the main ingredient, and other additives are blended, and there is no concern about the above. Also, since the flame retardancy is excellent in high temperature safety, there is a risk of fire such as high temperature metal, electric spark, heating furnace, etc. The present invention aims at providing a new hydraulic fluid composition which can be used even in the presence of the present invention and has excellent characteristics such as wear resistance, corrosion resistance, cooling property, and rust resistance.
더우기 수-글리콜계 작동유는 석유계 유압작동유에 비해서도 윤활성이 뛰어나고, 합성계 유압작동유에 비해서도 내마모성 및 산화안정성이 우수할 뿐 아니라 가격적 측면에서도 훨씬 유리한 장점이 있으나, 기존의 수-글리코계 유압작동유는 윤활성의 한계로 인하여 최근까지만 해도 저압내지 중압의 유압장치에 국한되어 사용되어 왔다.Moreover, the water-glycol hydraulic fluid has excellent lubricity compared to the petroleum hydraulic fluid, and has excellent wear resistance and oxidation stability as well as a price advantage compared to the synthetic hydraulic oil. Due to the limitation of lubricity, it has been used until recently to be limited to low to medium pressure hydraulics.
본 발명은 내마모성 및 윤활성 향상첨가제를 적량 첨가하여 작동유의 윤활성능을 향상시킴과 동시에 기타 특수 첨가제가 포함되어 우수한 전단 안정성을 지닌 고점도지수(220이상) 제품으로서, 전단응력이 큰 고압(250kg/cm2)의 가혹한 작업상황이나 연속조업에 있어서도 안정된 점도를 유지하며 펌프의 체적효율과 유압전달효율을 극대화시킬 수 있게 하였다. 또한 본 작동유는 내부식성에 있어서도 Cd와 Zn을 제외한 대부분의 비철금속 및 철계에 대해 뛰어난 내성이 있고, 팩킹 및 밀봉등이 합성고무에 대한 상용성이 우수할 뿐 아니라, 산화, 열 및 저온안정성이 뛰어나며, 유동점(-45℃)이 낮아 저온에서도 시동이 가능한 사계절용 유압작동유로서 온도변화가 있는 곳에서도 장기간 가능하다. 그 외에도 독성이 없으며, 적색색소의 첨가로 타유와의 식별이 용이하고, 유압장치의 누유개소를 쉽게 찾아낼 수 있을 뿐 아니라, 유제의 색상과 투명도로써 오염의 정도를 파악할 수 있는 장점을 갖고 있다.The present invention improves the lubricating performance of the working oil by adding an appropriate amount of abrasion resistance and lubricity improving additives and at the same time contains other special additives, and has a high viscosity index (220 or more) product having excellent shear stability. It maintains stable viscosity even in the harsh working conditions and continuous operation of 2 ), and maximizes the volumetric efficiency of the pump and the hydraulic transmission efficiency. In addition, the hydraulic oil has excellent resistance to most non-ferrous metals and ferrous metals except for Cd and Zn in corrosion resistance, and has excellent compatibility with synthetic rubber for packing and sealing, as well as excellent oxidation, heat and low temperature stability. It is a hydraulic oil for four seasons that can be started even at low temperature due to low pour point (-45 ℃) and can be used for a long time even in the temperature change. In addition, it is not toxic and can be easily identified with other oils by adding red pigment, and it is easy to find the oil leakage part of hydraulic system, and it has the advantage of identifying the degree of contamination by the color and transparency of the emulsion. .
이러한 본 발명의 조성물은 물과 글레콜계 용제 및 중점제를 주성분으로 하여 기타 특수첨가제가 배합된 것으로서 그 배합비율 및 각 성분의 주요 기능은 다음과 같다.The composition of the present invention is a water and glycol-based solvent and other special additives are formulated as a main component as a main component, the mixing ratio and the main functions of each component are as follows.
본 발명의 조성물은 물 35~50중량부, 용제 25~50중량부, 중점제 10~20중량부, 윤활제 1~5중량부, 방청제 1~3중량부, 소포제 잔량으로 구성되어 있다. 조성물성분 중 물은 작동유의 냉각 및 난연성 유지에 필요불가결한 것으로서 이온교환황수나 증류수를 35~50중량부 사용하는데, 수분의 증발에 의한 냉각효과와 수증기가 공기중의 산소농도를 희석시킴으로써 연소방해작용을 하여 착화하여도 소화작용을 하게 된다.The composition of the present invention is composed of 35 to 50 parts by weight of water, 25 to 50 parts by weight of solvent, 10 to 20 parts by weight of medium agent, 1 to 5 parts by weight of lubricant, 1 to 3 parts by weight of rust preventive agent, and residual amount of antifoaming agent. Water in the composition is indispensable for cooling the working oil and maintaining flame retardancy, and uses 35 to 50 parts by weight of ion-exchanged sulfur water or distilled water, which prevents combustion by cooling the water by evaporation of water and diluting the oxygen concentration in the air. It works by complexing it will be digested.
용제로는 물에 잘 용해되는 글리콜을 약 25~50중량부 사용하는 것이 바람직하며 글리콜의 중량부가 50이상이면 작동유의 내화성이 떨어지고 점도가 너무 낮아지며, 25미만이면 유동점이 너무 높아지는 폐단이 있다. 사용가능한 글리콜의 예로는 에틸렌글리콜, 프로필렌글리콜, 디에틸렌글리콜 및 디프로필렌글리콜을 들 수 있는데 실시예에서도 에틸렌글리콜을 사용하였으며, 이는 작동유의 유동점강하와 더불어 각종 첨가제의 용해를 용이하게 하여 상용성을 증대시키는 역할을 한다.As a solvent, it is preferable to use about 25 to 50 parts by weight of glycol which is well dissolved in water. If the weight of glycol is 50 or more, the fire resistance of the working oil is lowered and the viscosity is too low. Examples of glycols that can be used include ethylene glycol, propylene glycol, diethylene glycol and dipropylene glycol. In the embodiment, ethylene glycol was used, which facilitates dissolution of various additives along with a drop in the pour point of the working oil. It serves to increase.
중점제로 사용되는 플리알킬렌글리콜(PAG ; Poly Alkylene Glycol)은 부가중합방법에 따라 크게 블록형과 랜덤형으로 분류되는데, 본 발명에 사용된 PAG는 그 중 랜덤형에 속하는 것으로서 에틸렌글리콜을 개시원료로 하여 에틸렌옥사이드(E0)와 프로필렌옥사이드(P0)를 랜덤하게 부가중합시킨 평균분자량 15,000~20,000의 비이온 계면활성제이며 그 화학구조식은 다음과 같이 나타낼 수 있다.Polyalkylene glycol (PAG; Poly Alkylene Glycol) used as a mid-weight agent is classified into block type and random type according to addition polymerization method. PAG used in the present invention belongs to random type among them. The nonionic surfactant having an average molecular weight of 15,000 to 20,000 by random addition polymerization of ethylene oxide (E0) and propylene oxide (P0) can be represented as follows.
위의 식(1)에서 a 및 c는 E0의 몰수를 b는 P0의 몰수를 나타내며, 본 공중합체에서 E0:P0의 몰비율은 10:1~1:10이다. PAG는 작동유의 적정점도유지가 그 주요 목적으로 중점제의 첨가량을 조정함으로써 각종 ISO Viscosity Grade에 적합한 작동유를 얻을 수 있는데, 바람직한 PAG의 중량부는 10-20이며 중량부가 20이상이면 억포효과가 저하되며 10미만이면 적정점도를 얻기 어럽게 된다. 본 발명품에 사용되는 PAG는 그동안 널리 사용되어온 고가의 수입 PAG를 대체한 것으로서 독성이 없고, 산, 알칼리, 과산화물, 금속이온등에도 매우 안정할 뿐 아니라, 유동점이 낮고 윤활성 및 전단안정성이 우수하며 또한 고점도지수를 갖고 있다. 수-글리콜계 유압작동유의 윤활제로 사용되는 지방산의 예로는 포화지방산, 불포화지방산, 직쇄형지방산, 분지형지방산으로서 그 일반식은 다음과 같이 표시될 수 있다.In the above formula (1), a and c represent the number of moles of E0, b represents the number of moles of P0, and the molar ratio of E0: P0 in the present copolymer is 10: 1 to 1:10. PAG is suitable for maintaining the proper viscosity of the hydraulic oil to obtain a suitable hydraulic oil for various ISO Viscosity Grades by adjusting the addition amount of the central agent, the preferred weight of the PAG is 10-20, if the weight is 20 or more, the suppression effect is reduced. Less than 10 makes it difficult to obtain a proper viscosity. PAG used in the present invention is a substitute for expensive imported PAG, which has been widely used in the past, and is not toxic, and is very stable against acids, alkalis, peroxides, metal ions, etc., and has a low pour point, excellent lubricity and shear stability, It has a high viscosity index. Examples of fatty acids used as lubricants for water-glycol hydraulic fluids are saturated fatty acids, unsaturated fatty acids, straight fatty acids, and branched fatty acids, the general formula of which can be represented as follows.
위에서 n은 정수를 나타내며 전체 탄소수는 10-22가 바람직하다. 일반적으로 탄소수가 10미만이면 유막형성이 부족하고 윤활성이 저조한 단점이 있으며, 탄소수가 22이상이면 사용안정성이 떨어지는 단점이 있다. 지방산의 혼합비율은 유압작동유의 1-5중량부가 바람직하며, 만일 중량부가 1미만이면 내마모성이 떨어지며 5이상이면 용해성이 떨어져 지방산자체가 분리될 위험이 있다.N represents an integer and the total carbon number is preferably 10-22. Generally, if the carbon number is less than 10, the oil film formation is insufficient and the lubricity is poor, and if the carbon number is 22 or more, the use stability is inferior. The mixing ratio of fatty acids is preferably 1-5 parts by weight of hydraulic oil, and if the weight part is less than 1, the wear resistance is inferior.
방청첨가제로는 액상방청제와 기상방청제의 두 종류가 총 1-3중량부 사용되었는데, 액상방청제로는 디메틸아미노-2-프로파놀이, 기상방청제로는 이소프로필디에타놀아민 및 디에틸에타놀아민등이 사용되었다. 위에 열거한 기상방청제들은 pH조정제로서의 역할도 겸하고 있는데, 대부분의 수-글리콜계 유압작동유가 내마모성을 주는 윤활첨가제를 안정화시키기 의해 알칼리성을 띠는 점을 고러혈 때, 기상방청제는 그 중요성이 더욱 주목된다. 일반적으로 pH가 10미만이면 슬러지(Sluge)용해도가 떨어지며 12이상이면 내마모성이 떨어지게 된다.As a rust preventive additive, two kinds of liquid rust preventive agent and gas phase rust preventive agent were used in total 1-3 parts by weight.The liquid rust preventive agent was dimethylamino-2-propanol, and the vapor rust preventive agent isopropyl diethanolamine and diethylethanolamine. This was used. The above-mentioned gaseous rust inhibitors also serve as pH adjusters, and the importance of gaseous rust preventers is more important when considering that most water-glycol hydraulic fluids are alkaline by stabilizing wear resistant lubricant additives. do. In general, when the pH is less than 10, the solubility of the sludge is reduced, and if it is more than 12, the wear resistance is reduced.
소포제는 실리콘계 소포제를 미량 사용하였는데, 일반적으로 소포성이 나쁘면 작동유의 압축성을 증대시켜 유압장치의 작동불량을 초래하고, 펌프의 공간형성으로 인한 굉음이 발생하여 효율이 저하되며, 또한 기기의 부식이 촉진될 수 있으므로, 적절한 소포제를 선택하는 것은 매우 큰 의미를 갖는다 하겠다. 이외에도 본 작동유에는 적색색소 및 부식방지제로서 톨루트리아졸(Tolu Triazole)이 미량 첨가되어 있으며, 수-글리콜계 유압작동유에 있어서는 트리아졸계통의 부식방지제가 철계 및 비철금속에 대해 충분한 내부식성을 부여하게 된다.Antifoaming agent used a small amount of silicone antifoaming agent.In general, when the antifoaming property is bad, the compressibility of the hydraulic fluid is increased, which causes malfunction of the hydraulic system, and the noise is generated due to the space formation of the pump. Since it can be promoted, the selection of a suitable antifoaming agent is very significant. In addition, a small amount of tolutriazole is added to the working oil as a red pigment and a corrosion inhibitor, and in a water-glycol hydraulic fluid, a triazole type corrosion inhibitor provides sufficient corrosion resistance to iron and nonferrous metals. do.
본 유압작동유의 실시예(제조예)는 다음의 표 1과 같으며, 각각의 주요성상 분석결과는 표 2에 나타나 있다.Examples of the hydraulic fluid (manufacturing example) are shown in Table 1 below, and the results of the analysis of the main properties are shown in Table 2 below.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100844466B1 (en) * | 2006-12-11 | 2008-07-07 | 한국생산기술연구원 | Hydraulic oil composition |
KR20160050327A (en) * | 2014-10-29 | 2016-05-11 | (주)한중유화 | Eco-friendly water based hydraulic oil composition |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100410335B1 (en) * | 2001-07-03 | 2003-12-18 | 현대자동차주식회사 | Damping Fluid for Enging Mounting |
-
1996
- 1996-02-08 KR KR1019960003102A patent/KR0154891B1/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100844466B1 (en) * | 2006-12-11 | 2008-07-07 | 한국생산기술연구원 | Hydraulic oil composition |
KR20160050327A (en) * | 2014-10-29 | 2016-05-11 | (주)한중유화 | Eco-friendly water based hydraulic oil composition |
Also Published As
Publication number | Publication date |
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KR970062014A (en) | 1997-09-12 |
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