CN108177278A - A kind of injection molding machine special grease and preparation method - Google Patents
A kind of injection molding machine special grease and preparation method Download PDFInfo
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- CN108177278A CN108177278A CN201711144283.7A CN201711144283A CN108177278A CN 108177278 A CN108177278 A CN 108177278A CN 201711144283 A CN201711144283 A CN 201711144283A CN 108177278 A CN108177278 A CN 108177278A
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- acid
- injection molding
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- machine special
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a kind of injection molding machine special grease and preparation method, which includes base oil, aliphatic acid, binary acid, monohydrate lithium hydroxide, texturing agent, antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier；Preparation method includes 1/2~2/3 base oil, aliphatic acid and binary acid are mixed heating by weight percentage, it adds in monohydrate lithium hydroxide solution and carries out saponification, continue heating and add in texturing agent, it heats up again and carries out high temperature refining, add in remaining base oil, antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier are sequentially added after homogenizing, after stirring evenly, deaerating.The remarkable advantage of the present invention has excellent extreme pressure anti-wear, mechanical stability, adhesiveness and colloid stability for the injection molding machine special grease；Meanwhile preparation process is simple, operability is strong.
Description
Technical field
The invention belongs to lubricating grease field more particularly to a kind of injection molding machine special grease and preparation methods.
Background technology
Injection molding machine also known as injection (mo(u)lding) machine or injector, it is that thermoplastic or thermosetting property material profit are used plastic shaping
The main former of variously-shaped plastic products is made in mold, be widely used in national defence, electromechanics, automobile, communications and transportation,
Building materials, packaging, agricultural, culture, education and public health and people's daily life every field.Injection molding technique has the processing of various plastics
There is good adaptability, production capacity is higher, and easy to automate.In today that plastics industry rapidly develops, injection molding machine
No matter quantitatively or in kind all occupying an important position, so as to most fast as increasing in current plastics machinery, production quantity is most
One of more machine.
Lubrication lipid species currently on the market are various, but there is no injection molding machine tailored version lubricating grease, therefore actually using
Lubricating requirement of the lubricating grease it is impossible to meet injection molding machine for not meeting performance requirement is used in process.Meet note for this purpose, preparing
The dedicated lubricating grease in molding machine joint becomes particularly important.Patent of invention application No. is 200910302096.6 discloses a kind of note
The lubricating grease specially used preparation method of molding machine uses hydroxy stearic acid lithium soap as thickening agent, and adds the thio ammonia of butyl
Base formic acid antimony and the calcium carbonate of high level improve the extreme pressure property of lubricating grease and water-resistance, but colloid stability is poor；Shen
Please number for 201410586942.2 a kind of preparation method of injection molding machine special grease of disclosure of the invention, with good viscous
Attached property, extreme pressure property and water-resistance, but preparation process is complicated, is not suitable for large-scale production.
Invention content
Goal of the invention：The first object of the present invention be to provide it is a kind of have superior heat-resisting quantity, lubricity, wear resistence and
Adhesion property, the excellent injection molding machine special grease of cooling；
The second object of the present invention is to provide the preparation of greases method.
Technical solution：The injection molding machine special grease of the present invention includes following component by weight percentage：Base oil 80~
90%th, aliphatic acid 1~5%, binary acid 0.6~1.7%, monohydrate lithium hydroxide 0.5~1.5%, texturing agent 1~5%, anti-
Oxygen agent 0.1~1%, antirust agent 0.02~2%, extreme pressure anti-wear additives 1~5% and tackifier 0.5~2%.
The present invention using above-mentioned raw materials prepare lubricating grease not only have superior heat-resisting quantity, lubricity, wear resistence and
Adhesion property, and with splendid cooling effect, disclosure satisfy that injection molding machine joint setting under long-time heavy load Operation Conditions
Standby lubrication needs.Preferably, base oil 80~90%, aliphatic acid 2.5~5%, binary acid 0.8~1.5%, monohydrate lithium hydroxide
0.6~1.5%, texturing agent 1~4%, antioxidant 0.1~1%, antirust agent 0.02~1%, extreme pressure anti-wear additives 1~4% and
Tackifier 0.5~2%.
Furtherly, the kinematic viscosity of 40 DEG C of base oil of the invention is 60~120mm2/ s including at least mineral oil, gathers
One kind in alhpa olefin oil or Esters oil, wherein, Esters oil includes dibasic acid esters and/or neopentyl polyol ester.The present invention uses viscosity
For 60~120mm2The base oil of/s is more suitable for the use of injection molding machine, if viscosity is too low cannot to form enough oil films, and viscosity
It is excessively high so that bearing operation temperature is excessively high.
The aliphatic acid of the present invention is 12- hydroxy stearic acids and/or stearic acid, preferably can be 12- hydroxy stearic acids and tristearin
The mixture of acid, wherein, the weight ratio of 12- hydroxy stearic acids and stearic acid mixture can be 1.5~9:1；Binary acid at least may be used
Including one kind in glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid or decanedioic acid；It is preferred that it can be azelaic acid or the last of the ten Heavenly stems two
Acid.The molar ratio of aliphatic acid and binary acid preferably can be 1:0.3~0.6, which can further improve the colloid of lubricating grease
Stability and mechanical stability.
The texturing agent of the present invention thickens fiber for lipophile, including hydroxyethyl cellulose, hydrophobic modified hydroxyl second
Base cellulose, hydroxypropyl methyl cellulose or hydroxyethylmethylcellulose；Preferably, the diameter of cellulose at 1 μm hereinafter, addition
Such texturing agent can form specific firm reticular structure, improve the storage time and service life of lubricating grease.
The antioxidant of the present invention preferably may include diphenylamines and/or alkylated diphenylamine.Antirust agent can be benzotriazole
And/or thiadiazoles derivative.Extreme pressure anti-wear additives can be zinc dialkyl dithiophosphate and/or molybdenum dialkyl-dithiophosphate, adopt
The water resistant and abrasion resistance of special grease can be enhanced with such extreme pressure anti-wear additives.Tackifier at least may include polyisobutene
PB2400 or high viscosity complex ester Priolube 3986 preferably can be high viscosity complex ester Priolube 3986.
The present invention to lubricate by using antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier, reasonable complex additive
The PB values of fat reach 1236N, and wear scar diameter is less than 0.4mm, and extreme pressure and antiwear behavior is outstanding.The additive can preferably spread out for thiadiazoles
Biology, zinc dialkyl dithiophosphate, molybdenum dialkyl-dithiophosphate and high viscosity complex ester Priolube 3986.
The method that the present invention prepares injection molding machine special grease, includes the following steps：
(1) 1/2~2/3 base oil, aliphatic acid and binary acid are mixed by weight percentage, is heated with stirring to 75~85
DEG C, mixed liquor is made；
(2) monohydrate lithium hydroxide is configured to aqueous solution, added in above-mentioned mixed liquor, carried out saponification, then heat up
To 140~150 DEG C, texturing agent stirring is added in, is warming up to 205~215 DEG C, keeps the temperature 3~5min；
(3) remaining base oil is added in, filtering after being homogenized, sequentially adds antioxidant, antirust agent, extreme pressure anti-wear additives and increasing
Stick stirs evenly, deaerates, you can.
Advantageous effect：Compared with prior art, remarkable advantage of the invention is：The lubricating grease not only has superior resistance to height
Warm nature, lubricity, wear resistence and adhesion property, and with splendid cooling effect, disclosure satisfy that injection molding machine joint for a long time
Equipment lubrication demand under heavy load Operation Conditions；Meanwhile in the preparation by 12 hydroxy stearic acids with it is stearic reasonably combined
And after being reacted with binary acid and monohydrate lithium hydroxide, then texturing agent is added, the polar end in soap fiber can be adsorbed, increased
Soap fiber spacing forms more stable reticular structure so that lubricating grease soap-oil systems stable structure has fabulous colloid
Roadholding, under longer-term time condition of storage, point oil is less.
Specific embodiment
Technical scheme of the present invention is described in further details with reference to embodiment.
Example 1 below -3 prepares injection molding machine special grease with comparative example 1 by 1 raw material of table.The raw material that the present invention uses
It is commercially available to obtain.
Embodiment 1-3
The preparation of greases method of the present embodiment 1-3 includes the following steps：
(1) 1/2 base oil, aliphatic acid and binary acid are all put into saponification kettle, is heated with stirring to 80 DEG C, treats the fat
The all dissolvings of fat acid；Wherein, base oil is mineral base oil and/or synthetic base oil, and 40 DEG C of kinematic viscosity for 60~
120mm2/s；
(2) monohydrate lithium hydroxide aqueous solution, the saponification 2.5h under the conditions of 100 DEG C are added in；
(3) after the completion of saponification, 145 DEG C are continuously heating to, adds in texturing agent, 25min is stirred, is then warming up to again
210 DEG C of progress high temperature refinings, keep the temperature 4min；
(4) remaining base oil is added in, 170 DEG C is chilled to, turns kettle, circulating filtration is cooled to 115 DEG C, after homogenizing successively
Antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier are added in, are stirred evenly, lubricating grease is made after degassing.
Comparative example 1
The lubricating grease preparation method of this comparative example includes the following steps：
(1) 1/3 base oil and aliphatic acid are all put into saponification kettle, is heated with stirring to 80 DEG C, treats that the aliphatic acid is complete
It dissolves in portion；
(2) monohydrate lithium hydroxide aqueous solution, the saponification 1.5h under the conditions of 100 DEG C are added in；
(3) after the completion of saponification, 145 DEG C are continuously heating to, adds 2/3 base oil in remaining base oil, is stirred
20min then heats to 210 DEG C of progress high temperature refinings, keeps the temperature 4min；
(4) remaining base oil is added in, 170 DEG C is chilled to, turns kettle, circulating filtration is cooled to 115 DEG C, after homogenizing successively
Antioxidant, antirust agent and extreme pressure anti-wear additives are added in, are stirred evenly, lubricating grease is made after degassing.
Lubricating grease prepared by above-described embodiment 1-3 and comparative example 1 carries out performance detection, and the results are shown in Table 2 for acquisition.
1 embodiment 1-3 of table and the raw material of comparative example 1
| Raw material | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 |
| Mineral oil base oil | 83.8 | 85.7 | 85.9 | 91.55 |
| 12- hydroxy stearic acids | 3.5 | 3 | 3.2 | 3.5 |
| Stearic acid | 1.5 | 2 | 0.8 | — |
| Decanedioic acid | 1.5 | — | 1.36 | — |
| Azelaic acid | — | 1.5 | — | — |
| Monohydrate lithium hydroxide | 1.25 | 1.5 | 1.14 | 0.5 |
| Hydroxyethyl cellulose | 2 | — | — | — |
| Hydroxyethylmethylcellulose | — | 1.5 | — | — |
| Hydroxypropyl methyl cellulose | — | — | 3 | — |
| Diphenylamines | 0.5 | 0.5 | — | 0.5 |
| Alkylated diphenylamine | 0.3 | — | 0.5 | 0.3 |
| Thiadiazoles derivative | 0.6 | 0.2 | — | 0.6 |
| Benzotriazole | 0.05 | 0.1 | 0.1 | 0.05 |
| Zinc dialkyl dithiophosphate | 2 | 1.5 | 2 | 2 |
| Molybdenum dialkyl-dithiophosphate | 1 | 1.5 | 1 | 1 |
| Priolube 3986 | 2 | 1 | 1 | — |
The physicochemical property inspection data of 2 above-described embodiment comparative example of table
By table 2 it is found that injection molding machine special grease prepared by embodiment 1-3 not only has excellent water-resistance, adherency
Property, colloid stability and pumping, and dropping point is high, has outstanding extreme pressure Wear vesistance, can effectively ensure that equipment is persistently moistened
It is sliding；And comparative example 1 is the lubricating grease prepared using existing method, compared to embodiment 1-3, the grease structure of preparation is inadequate
Stablize, cause extreme pressure Wear vesistance, adhesiveness, colloid stability poor.
Embodiment 4-7
The present embodiment 4-7 prepares injection molding machine special grease by 3 raw material of table.
The raw material that 3 embodiment 4-7 of table is used
Preparation method includes the following steps：(1) 1/2 base oil, aliphatic acid and binary acid are all put into saponification kettle, stirred
It mixes and is heated to 75 DEG C, treat that the aliphatic acid all dissolves；Wherein, the kinematic viscosity of 40 DEG C of base oil is 60~120mm2/s；
(2) monohydrate lithium hydroxide aqueous solution, and the saponification 2.5h under the conditions of 95 DEG C are added in；
(3) after the completion of saponification, 140 DEG C are continuously heating to, adds in texturing agent, 30min is stirred, then heats to 205
DEG C carry out high temperature refining, keep the temperature 5min；
(4) remaining base oil is added in, 165 DEG C is chilled to, turns kettle, circulating filtration is cooled to 120 DEG C, after homogenizing successively
Antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier are added in, are stirred evenly, lubricating grease is obtained after degassing.
Lubricating grease prepared by embodiment 4-7 carries out performance detection, and the results are shown in Table 4 for acquisition.
The physicochemical property inspection data of 4 embodiment 4-7 of table
By table 4 it is found that injection molding machine special grease prepared by embodiment 4-7 not only has excellent water-resistance, adherency
Property, colloid stability and pumping and, dropping point is high, has outstanding extreme pressure Wear vesistance, can effectively ensure that equipment is persistently moistened
It is sliding.
Embodiment 8-11
The present embodiment 8-11 prepares injection molding machine special grease by 5 raw material of table.
The raw material that 5 embodiment 8-11 of table is used
Preparation method：(1) 2/3 base oil, aliphatic acid and binary acid are all put into saponification kettle, is heated with stirring to 85
DEG C, treat that the aliphatic acid all dissolves；Wherein, the kinematic viscosity of 40 DEG C of base oil is 60~120mm2/s。
(2) monohydrate lithium hydroxide aqueous solution, and the saponification 2h under the conditions of 105 DEG C are added in；
(3) after the completion of saponification, 150 DEG C are continuously heating to, adds in texturing agent, 20min is stirred, then heats to 215
DEG C carry out high temperature refining, keep the temperature 3min；
(4) remaining base oil is added in, 175 DEG C is chilled to, turns kettle, circulating filtration is cooled to 110 DEG C, after homogenizing successively
Antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier are added in, are stirred evenly, lubricating grease is obtained after degassing.
Lubricating grease prepared by embodiment 4-7 carries out performance detection, and the results are shown in Table 6 for acquisition.
The physicochemical property inspection data of 6 embodiment 8-11 of table
By table 6 it is found that injection molding machine special grease prepared by embodiment 8-11 not only has excellent water-resistance, adherency
Property, colloid stability and pumping and, dropping point is high, has outstanding extreme pressure antifriction performance, can effectively ensure that equipment is persistently moistened
It is sliding.
Claims (10)
1. a kind of injection molding machine special grease, it is characterised in that by weight percentage including following component：Base oil 80~90%,
Aliphatic acid 1~5%, binary acid 0.6~1.7%, monohydrate lithium hydroxide 0.5~1.5%, texturing agent 1~5%, antioxidant
0.1~1%, antirust agent 0.02~2%, extreme pressure anti-wear additives 1~5% and tackifier 0.5~2%.
2. injection molding machine special grease according to claim 1, it is characterised in that：The kinematic viscosity of 40 DEG C of the base oil
For 60~120mm2/ s includes at least one kind in mineral oil, poly-a-olefin oil or Esters oil.
3. injection molding machine special grease according to claim 1, it is characterised in that：The aliphatic acid is 12- hydroxy stearates
Acid and/or stearic acid.
4. injection molding machine special grease according to claim 3, it is characterised in that：The aliphatic acid is 12- hydroxy stearates
Acid and stearic acid, wherein, 12- hydroxy stearic acids are 1.5~9 with stearic weight ratio:1.
5. injection molding machine special grease according to claim 1, it is characterised in that：The binary acid includes at least penta 2
One kind in acid, adipic acid, pimelic acid, suberic acid, azelaic acid or decanedioic acid.
6. injection molding machine special grease according to claim 1, it is characterised in that：The texturing agent is fine for ethoxy
Tie up element, hydrophobic modified hydroxyethyl cellulose, hydroxypropyl methyl cellulose or hydroxyethylmethylcellulose.
7. injection molding machine special grease according to claim 1, it is characterised in that：The antioxidant for diphenylamines and/or
Alkylated diphenylamine.
8. injection molding machine special grease according to claim 1, it is characterised in that：The antirust agent is benzotriazole
And/or thiadiazoles derivative.
9. injection molding machine special grease according to claim 1, it is characterised in that：The extreme pressure anti-wear additives are dialkyl group two
D2EHDTPA zinc and/or molybdenum dialkyl-dithiophosphate.
A kind of 10. method for preparing injection molding machine special grease described in claim 1, it is characterised in that include the following steps：
(1) 1/2~2/3 base oil, aliphatic acid and binary acid are mixed by weight percentage, are heated with stirring to 75~85 DEG C,
Mixed liquor is made；
(2) monohydrate lithium hydroxide is configured to aqueous solution, adds in and saponification is carried out in above-mentioned mixed liquor, then raise temperature to 140
~150 DEG C, texturing agent stirring is added in, is warming up to 205~215 DEG C, keeps the temperature 3~5min；
(3) remaining base oil is added in, filtering after being homogenized, sequentially adds antioxidant, antirust agent, extreme pressure anti-wear additives and tackifier,
It stirs evenly, deaerate, you can.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115851340A (en) * | 2022-11-10 | 2023-03-28 | 江苏龙蟠科技股份有限公司 | Preparation method of high-dropping-point single lithium soap lubricating grease |
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| CN106675708A (en) * | 2016-12-16 | 2017-05-17 | 莱茵德控润滑油（上海）有限公司 | Environment-friendly wheel-rail lubricating anti-abrasive agent |
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2017
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| JPH0586161A (en) * | 1991-09-30 | 1993-04-06 | Nippon Polyurethane Ind Co Ltd | Internal mold release agent and production of molded polyurethane and/or polyurea article excellent in releasability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115851340A (en) * | 2022-11-10 | 2023-03-28 | 江苏龙蟠科技股份有限公司 | Preparation method of high-dropping-point single lithium soap lubricating grease |
| CN115851340B (en) * | 2022-11-10 | 2024-02-09 | 江苏龙蟠科技股份有限公司 | Preparation method of high-dropping-point single-lithium soap lubricating grease |
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