CN111333510A - High-temperature-resistant lubricant, and preparation method and application thereof - Google Patents

High-temperature-resistant lubricant, and preparation method and application thereof Download PDF

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Publication number
CN111333510A
CN111333510A CN202010146442.2A CN202010146442A CN111333510A CN 111333510 A CN111333510 A CN 111333510A CN 202010146442 A CN202010146442 A CN 202010146442A CN 111333510 A CN111333510 A CN 111333510A
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temperature
resistant lubricant
acid
reaction
lubricant
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郑德�
陈俊
蔡博伟
黄玉松
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Guangdong Winner New Materials Technology Co ltd
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Guangdong Winner New Materials Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/52Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
    • C07C69/533Monocarboxylic acid esters having only one carbon-to-carbon double bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/08Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/04Oxygen-containing compounds
    • C08K5/10Esters; Ether-esters
    • C08K5/101Esters; Ether-esters of monocarboxylic acids
    • C08K5/103Esters; Ether-esters of monocarboxylic acids with polyalcohols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Lubricants (AREA)

Abstract

The invention discloses a high-temperature-resistant lubricant which has a structure shown in a formula (I):
Figure DDA0002400868190000011
wherein, C15H31COO-is palmitate radical, C17H35COO-is stearate, C21H41COO-is a erucic acid group; a. b and c are 0.1 to 3.6, d is 0.2 to 3.7, and a + b + c + d is 4. The high-temperature-resistant lubricant provided by the invention has excellent high-temperature resistance and lubricating effect because the molecule of the high-temperature-resistant lubricant contains a plurality of fatty chains with more than 12 carbon atoms and has large molecular weight and no hydrogen atom on the quaternary carbon atom position, and has better application in the field of engineering plasticsAnd 4, application prospect.

Description

High-temperature-resistant lubricant, and preparation method and application thereof
Technical Field
The invention relates to the technical field of material processing aid lubricants, in particular to a high-temperature-resistant lubricant and a preparation method and application thereof.
Background
The processing of polymers is usually carried out above their crystalline melting point, and for amorphous polymers above the glass transition temperature, the macromolecular structure of these substances often leads to very high melt viscosities. The processing of these polymers and their deformation or setting requires pressure, and the shear forces generated during processing lead to a dispersion of mechanical energy, especially in those cases where the melt resistance is high, the heat generated by the resistance can accelerate the degradation reaction or can have an adverse effect on the dispersion of the multiphase system.
The possibilities of optimizing the processing of plastics by selecting suitable monomers, controlling the molecular weight and the structure of the macromolecules are limited. The main methods for solving these problems include not only the rational selection of various machines and dies in the processing process, but also the selection of proper lubricants for improving the melt rheology of the polymer into the desired state, so that the processing of the polymer can be smoothly carried out.
For engineering plastics, the output and processing temperatures with modern processing equipment have increased in recent years. Therefore, it is very necessary to use a high temperature resistant lubricant.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a high-temperature-resistant lubricant, a preparation method and an application thereof, and the high-temperature-resistant lubricant has higher thermal stability and better application prospect in the field of engineering plastics.
The technical scheme adopted by the invention is as follows:
in a first aspect of the present invention, there is provided a high temperature resistant lubricant having the structure of formula (i):
Figure BDA0002400868170000011
wherein a, b and c are 0.1-3.6, d is 0.2-3.7, and a + b + c + d is 4.
Wherein C is15H31COO-is palmitate radical, C17H35COO-stearate radical, C21H41COO-is a erucic acid group.
In a second aspect of the present invention, there is provided a method for preparing the above high temperature resistant lubricant, comprising the following steps:
taking reaction raw materials containing palmitic acid, stearic acid, erucic acid and pentaerythritol;
and adding a catalyst and a water-carrying agent into the reaction raw materials to perform esterification reaction.
According to some embodiments of the present invention, further comprising the step of determining the acid number of the esterification reaction system. Whether the end point of the esterification reaction was reached was judged by measuring the acid value.
Further according to some embodiments of the present invention, after the esterification reaction is finished, the method further comprises the step of removing the water-carrying agent by distillation under reduced pressure.
According to some embodiments of the invention, the reaction feed comprises, in the reaction feed, palmitic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1, stearic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1, erucic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1.
according to some embodiments of the invention, the catalyst comprises at least one of phosphoric acid, phosphorous acid, p-toluenesulfonic acid, and stannous oxide.
According to some embodiments of the invention, the water-carrying agent comprises at least one of toluene, xylene and cyclohexane.
According to some embodiments of the invention, the esterification reaction is carried out at a reaction temperature of 120 ℃ to 200 ℃.
According to some embodiments of the invention, the esterification reaction is carried out for a reaction time of 2 to 5 hours.
In a third aspect of the invention, there is provided a lubricant composition comprising the high temperature resistant lubricant described above.
In a fourth aspect of the invention, there is provided the use of a high temperature resistant lubricant as described above or a lubricant composition as described above in the preparation of an engineering plastic.
According to some embodiments of the invention, the engineering plastic is a thermoplastic engineering plastic or a modified engineering plastic.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a high-temperature-resistant lubricant which is prepared by carrying out catalytic reaction on reaction raw materials containing palmitic acid (16 carbon atoms in a molecular chain), stearic acid (18 carbon atoms in the molecular chain), erucic acid (22 carbon atoms in the molecular chain) and pentaerythritol. The lubricant contains multiple fatty chains with more than 12 carbon atoms in the structure, and has effective lubricating effect. Because quaternary carbon atoms in the molecules of the lubricating grease have no hydrogen atoms, the lubricating grease has excellent high-temperature resistance and lubricating effect, and has better application prospect in the field of engineering plastics.
Drawings
FIG. 1 is a graph of the thermal weight loss of the high temperature resistant lubricant of example 1;
FIG. 2 is a graph of the thermal weight loss of the high temperature resistant lubricant of example 2;
FIG. 3 is a graph of the thermal weight loss of the high temperature resistant lubricant of example 3;
fig. 4 is a graph of the thermal weight loss of the high temperature resistant lubricant of example 4.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Example 1
This example provides a high temperature resistant lubricant, prepared according to the following steps:
38.46g (0.15mol) of palmitic acid, 68.28g (0.24mol) of stearic acid, 162.51g (0.48mol) of erucic acid and 40.85g (0.3mol) of pentaerythritol are added into a 500mL four-neck flask provided with a stirrer, a thermometer and a water diversion condensation reflux device, 0.5g of phosphoric acid is added as a catalyst, 15g of toluene is added as a water carrying agent, the mixture is heated to 120 ℃ for esterification reaction, the reaction time is 5 hours, the acid value is 1.52mg KOH/g, the reaction is at the end point, and the reaction is finished. And (3) distilling under reduced pressure to remove residual water-carrying agent and water, and drying the product to obtain the high-temperature-resistant lubricant, wherein the structural formula of the product is as follows:
Figure BDA0002400868170000031
the high-temperature-resistant lubricant prepared in the example is taken and subjected to thermogravimetric analysis, and the result is shown in fig. 1, wherein the initial decomposition temperature of the product measured by a thermogravimetric analyzer is 419.4 ℃, which indicates that the decomposition temperature of the product is high, meets the high-temperature-resistant requirement, and is suitable for being used as the high-temperature-resistant lubricant.
Example 2
This example provides a high temperature resistant lubricant, prepared according to the following steps:
276.93g (1.08mol) of palmitic acid, 8.53g (0.03mol) of stearic acid, 10.16g (0.03mol) of erucic acid and 40.85g (0.3mol) of pentaerythritol are added into a 500mL four-neck flask provided with a stirrer, a thermometer and a water diversion condensation reflux device, 0.5g of phosphorous acid is added as a catalyst, 15g of xylene is added as a water-carrying agent, the mixture is heated to 150 ℃ for esterification reaction, the reaction time is 4 hours, the acid value is 1.03mgKOH/g, the reaction is at the end point, and the reaction is finished. And (3) distilling under reduced pressure to remove residual water-carrying agent and water, and drying the product to obtain the high-temperature-resistant lubricant, wherein the structural formula of the product is as follows:
Figure BDA0002400868170000041
the high-temperature-resistant lubricant prepared in the example is taken and subjected to thermogravimetric analysis, and the result is shown in fig. 2, wherein the initial decomposition temperature of the product measured by a thermogravimetric analyzer is 416.3 ℃, which shows that the decomposition temperature of the product is high, meets the high-temperature-resistant requirement, and is suitable for being used as the high-temperature-resistant lubricant.
Example 3
This example provides a high temperature resistant lubricant, prepared according to the following steps:
30.77g (0.12mol) of palmitic acid, 34.14g (0.12mol) of stearic acid, 121.89g (0.36mol) of erucic acid and 163.38g (1.2mol) of pentaerythritol are added into a 500mL four-neck flask provided with a stirrer, a thermometer and a water diversion condensation reflux device, 0.5g of p-toluenesulfonic acid is added as a catalyst, 15g of cyclohexane is added as a water carrying agent, the mixture is heated to 180 ℃ for esterification reaction, the reaction time is 3 hours, the acid value is measured to be 0.89mgKOH/g, the reaction is at the end point, and the reaction is finished. And (3) distilling under reduced pressure to remove residual water-carrying agent and water, and drying the product to obtain the high-temperature-resistant lubricant, wherein the structural formula of the product is as follows:
Figure BDA0002400868170000042
the high temperature resistant lubricant prepared in the example was taken and subjected to thermogravimetric analysis, and the result is shown in fig. 3, wherein the initial decomposition temperature of the product measured by a thermogravimetric analyzer was 417.2 ℃, which indicates that the decomposition temperature of the product is high, meets the high temperature resistant requirement, and is suitable for being used as a high temperature resistant lubricant.
Example 4
This example provides a high temperature resistant lubricant, prepared according to the following steps:
115.39g (0.45mol) of palmitic acid, 102.41g (0.36mol) of stearic acid, 81.26g (0.24mol) of erucic acid and 40.85g (0.3mol) of pentaerythritol are added into a 500mL four-neck flask provided with a stirrer, a thermometer and a water diversion condensation reflux device, 0.5g of stannous oxide is added as a catalyst, 15g of cyclohexane is added as a water carrying agent, the mixture is heated to 200 ℃ for esterification reaction, the reaction time is 2 hours, the acid value is measured to be 0.58mgKOH/g, the reaction reaches the end point, and the reaction is finished. And (3) distilling under reduced pressure to remove residual water-carrying agent and water, and drying the product to obtain the high-temperature-resistant lubricant, wherein the structural formula of the product is as follows:
Figure BDA0002400868170000051
the high-temperature-resistant lubricant prepared in the example is taken and subjected to thermogravimetric analysis, and the result is shown in fig. 4, wherein the initial decomposition temperature of the product measured by a thermogravimetric analyzer is 418.6 ℃, which indicates that the decomposition temperature of the product is high, meets the high-temperature-resistant requirement, and is suitable for being used as the high-temperature-resistant lubricant.
Effect example 1
60g of PVC, 1.8g of calcium-zinc composite heat stabilizer and 0.6g of the high-temperature-resistant lubricant prepared in the embodiment 1 are uniformly mixed to form a PVC/high-temperature-resistant lubricant sample, the PVC/high-temperature-resistant lubricant sample is placed in a torque rheometer, and the dynamic thermal stability of the PVC/high-temperature-resistant lubricant sample is tested at 180 ℃ and a rotating speed of 45r/min, wherein the calcium-zinc composite heat stabilizer is a product of Guangdong Weilinnacidae technologies GmbH in the embodiment. The lubricating effect of the high temperature resistant lubricant on PVC was evaluated based on the plasticizing torque, the equilibrium torque and the plasticizing time, and the results are shown in table 1.
TABLE 1 rheological parameters of PVC/high temperature resistant Lubricant samples
Figure BDA0002400868170000052
As can be seen from Table 1, the plasticizing torque, the balance torque and the plasticizing time of a PVC/high-temperature-resistant lubricant sample formed by adding the high-temperature-resistant lubricant are lower than those of a sample without adding the high-temperature-resistant lubricant, and the thermal stability time of the formed PVC/high-temperature-resistant lubricant sample is obviously longer than that of the sample without adding the high-temperature-resistant lubricant.

Claims (10)

1. A high temperature resistant lubricant characterized by having the structure of formula (i):
Figure FDA0002400868160000011
wherein C is15H31COO-is palmitate radical, C17H35COO-is stearate, C21H41COO-is a erucic acid group; a. b and c are 0.1 to 3.6, d is 0.2 to 3.7, and a + b + c + d is 4.
2. The method of preparing a high temperature resistant lubricant according to claim 1, comprising the steps of:
taking reaction raw materials containing palmitic acid, stearic acid, erucic acid and pentaerythritol;
and adding a catalyst and a water-carrying agent into the reaction raw materials to perform esterification reaction.
3. The method for preparing the high-temperature-resistant lubricant according to claim 2, wherein, in the reaction raw materials, the ratio of palmitic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1, stearic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1, erucic acid: the molar ratio of pentaerythritol is (0.1-3.6): 1.
4. the method of claim 2, wherein the catalyst comprises at least one of phosphoric acid, phosphorous acid, p-toluene sulfonic acid, and stannous oxide.
5. The method of claim 2, wherein the water-carrying agent comprises at least one of toluene, xylene, and cyclohexane.
6. The method of any of claims 2 to 5, wherein the esterification reaction is carried out at a temperature of 120 ℃ to 200 ℃.
7. The method for preparing the high-temperature-resistant lubricant according to claim 6, wherein the reaction time of the esterification reaction is 2 to 5 hours.
8. A lubricant composition comprising the high temperature resistant lubricant of claim 1.
9. Use of the high temperature resistant lubricant of claim 1 or the lubricant composition of claim 8 in the preparation of engineering plastics.
10. Use according to claim 9, wherein the engineering plastic is a thermoplastic engineering plastic or a modified engineering plastic.
CN202010146442.2A 2020-03-05 2020-03-05 High-temperature-resistant lubricant, and preparation method and application thereof Pending CN111333510A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114181764A (en) * 2021-12-17 2022-03-15 马鞍山中集瑞江润滑油有限公司 High-temperature forming lubricant
CN114369067A (en) * 2021-12-29 2022-04-19 广东科力新材料有限公司 Acylamino uracil and preparation method and application thereof
CN114394899A (en) * 2021-12-29 2022-04-26 广东科力新材料有限公司 Dipentaerythritol ester and preparation method and application thereof
CN114409534A (en) * 2021-12-29 2022-04-29 广东科力新材料有限公司 Pentaerythritol ester and preparation method thereof

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WO2018235716A1 (en) * 2017-06-20 2018-12-27 理研ビタミン株式会社 Polycarbonate resin releasing agent

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Publication number Priority date Publication date Assignee Title
CN1345895A (en) * 2000-09-28 2002-04-24 奇美实业股份有限公司 Transparent phonylethylene resin composition
JP2014084428A (en) * 2012-10-25 2014-05-12 Kao Corp Lubricant for a polycarbonate resin
CN105237400A (en) * 2015-11-12 2016-01-13 湖北科技学院 Plastic lubricant synthesis method
JP2018141100A (en) * 2017-02-28 2018-09-13 理研ビタミン株式会社 Mold release agent for polycarbonate resin
WO2018235716A1 (en) * 2017-06-20 2018-12-27 理研ビタミン株式会社 Polycarbonate resin releasing agent

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114181764A (en) * 2021-12-17 2022-03-15 马鞍山中集瑞江润滑油有限公司 High-temperature forming lubricant
CN114369067A (en) * 2021-12-29 2022-04-19 广东科力新材料有限公司 Acylamino uracil and preparation method and application thereof
CN114394899A (en) * 2021-12-29 2022-04-26 广东科力新材料有限公司 Dipentaerythritol ester and preparation method and application thereof
CN114409534A (en) * 2021-12-29 2022-04-29 广东科力新材料有限公司 Pentaerythritol ester and preparation method thereof

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Application publication date: 20200626