CN115093706A - Rubber compound and preparation method thereof - Google Patents

Rubber compound and preparation method thereof Download PDF

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Publication number
CN115093706A
CN115093706A CN202210700020.4A CN202210700020A CN115093706A CN 115093706 A CN115093706 A CN 115093706A CN 202210700020 A CN202210700020 A CN 202210700020A CN 115093706 A CN115093706 A CN 115093706A
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CN
China
Prior art keywords
silicone oil
rubber
white carbon
carbon black
preparing
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Pending
Application number
CN202210700020.4A
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Chinese (zh)
Inventor
周鑫
浩瀚
罗烨栋
罗燚
罗立国
杨金志
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Ningbo Longsheng Silicon Industry Co ltd
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Ningbo Longsheng Silicon Industry Co ltd
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Priority to CN202210700020.4A priority Critical patent/CN115093706A/en
Publication of CN115093706A publication Critical patent/CN115093706A/en
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04Polysiloxanes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The application provides a method for preparing rubber compound, which comprises the following steps: a) preparing a first mixture containing raw rubber, first silicone oil and white carbon black into a solid ointment; b) mixing a second mixture containing the solid ointment, the crude rubber and the white carbon black to prepare a mixed rubber; wherein, in step b), the solid ointment and the crude rubber are simultaneously added. The application also provides a rubber compound. According to the method for preparing the rubber compound, the high-viscosity silicone oil is prepared into the solid ointment, so that the original liquid is changed into a solid paste, the required weight is cut in advance according to the production requirement, and the raw rubber can be simultaneously put into a kneader when being added, so that the production efficiency is greatly improved.

Description

Rubber compound and preparation method thereof
Technical Field
The invention relates to the technical field of rubber, and particularly relates to a rubber compound and a preparation method thereof.
Background
At present, a kneader is generally adopted for an intermittent production process, different process sections such as powder feeding, agglomeration, vacuum high-temperature treatment, cooling, discharging and the like are required to be carried out in the kneader, and the rubber material is subsequently milled into coils or cut into small blocks, cooled for 4-8 hours, filtered and packaged to complete production.
Wherein, in the powder feeding process, a plurality of steps of raw rubber feeding, repeated white carbon black feeding, middle silicone oil small material feeding and the like are required; in the conventional production process, various small silicone oil materials need to be weighed in advance, after raw rubber and a small amount of white carbon black are added, a cylinder cover needs to be shut down and opened for adding, the labor intensity is high, the efficiency is low, and certain dangers exist. In the production process with relatively high automation degree, aiming at a part of silicone oil with more consumption and lower viscosity, an automatic oil feeding system is adopted to realize quick and accurate feeding; however, the other part of the silicone oil has a small amount and a large viscosity, the silicone oil with the large viscosity has a large flow resistance in a pipeline, and if an automatic oil feeding system is still adopted, a pump which needs to convey the silicone oil outputs more power, so that the production cost of equipment is greatly increased, and the production efficiency is also influenced. Therefore, the silicone oil with small dosage and high viscosity is usually added manually instead of an automatic oil adding system. The manual feeding method of silicone oil in conventional production or the manual feeding method of silicone oil in semi-automatic production can be a production mode which can be endured in a production mode with smaller scale. However, in a mode of large-scale and rapid production of rubber compound, the method can greatly influence the overall production efficiency, the production of each batch of rubber takes 10-15 minutes because the cover is opened halfway for manual oil feeding, while in a rapid production mode, a group of production lines can produce 15-20 batches of rubber compound every day, if the method of manually feeding silicone oil is adopted, the manual oil feeding time consumed every day can reach 2-3 hours, and the production efficiency of the rubber compound is seriously influenced.
Therefore, it is necessary to provide a method for preparing a rubber compound with high production efficiency and low production cost.
Disclosure of Invention
In order to solve the determination in the prior art, the application provides a rubber compound preparation method, through the method, manual oil injection is not needed to be stopped in the production process, an automatic oil injection system can be adopted in the whole process, the production efficiency is greatly improved, and meanwhile, the production cost of equipment cannot be increased.
According to a first aspect of the present application, there is provided a method of preparing a rubber compound, comprising the steps of: a) preparing a first mixture containing raw rubber, first silicone oil and white carbon black into solid ointment; b) mixing a second mixture containing the solid ointment, the crude rubber and the white carbon black to prepare a rubber compound; wherein, in step b), the solid ointment and the crude rubber are simultaneously added.
Optionally, the first mixture comprises: 50-200 parts of raw rubber, 50-200 parts of first silicone oil and 50-200 parts of white carbon black. For example, the weight parts of raw rubber may be 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200 parts or any value in between these values; the parts by weight of the first silicone oil may be 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200 parts or any value in between these values; the white carbon black can be 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200 parts by weight or any value between these values.
Optionally, the first mixture further comprises 2-20 parts by weight of a structural control agent; for example, the parts by weight of the structured control agent can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 parts or any value in between these values. The structural control agent comprises at least one of hydroxyl silicone oil, methoxy silicone oil, dimethyl dimethoxy silicone oil and silazane. In the application, the raw rubber and the white carbon black can be mixed more uniformly by adding the structural control agent, and the finally prepared rubber compound has good anti-structural performance.
Alternatively, the raw rubber in step a) and step b) may be selected from methyl vinyl silicone rubber.
Optionally, the first silicone oil comprises a high viscosity silicone oil and/or a low viscosity silicone oil.
Optionally, the high viscosity silicone oil comprises at least one of a high vinyl silicone oil and a polyvinyl silicone oil; the low-viscosity silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxyl silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil. By adding the high vinyl silicone oil and/or the polyvinyl silicone oil, the content of vinyl in the prepared mixed silicone rubber can be increased, so that the elasticity of the finally prepared mixed silicone rubber is increased, and the tear resistance of the mixed silicone rubber is improved. The anti-yellowing performance of the finally prepared mixed silicone rubber can be improved by adding hydrogen-containing silicone oil.
Alternatively, the white carbon in step a) and step b) may be respectively selected from at least one of precipitated white carbon and gas phase white carbon.
Optionally, the second mixture in step b) further comprises a second silicone oil; the second silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxyl silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil; and adding the second silicone oil through an automatic oil adding system.
Optionally, in step a), a kneader is used to mix a first mixture containing raw rubber, first silicone oil and white carbon black uniformly; wherein, the technological parameters in the mixing process comprise: mixing temperature: 25-80 ℃; mixing time: 1-1.5 hours; kneading frequency of the kneader: 20 to 50 Hz. Wherein the mixing temperature can be 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 ℃ or any value therebetween. The kneader kneading frequency may be 20, 30, 40, 50Hz or any value in between.
In the step b), the solid ointment and the crude rubber are simultaneously added into a kneader, and a second mixture containing the solid ointment, the crude rubber and the white carbon black is mixed in the kneader.
In the application, the solid ointment is prepared from the high-viscosity silicon oil, so that the problems that in the prior art, an automatic oil feeding system is inconvenient to feed high-viscosity silicon oil (the efficiency is low, the cost is high and the like) and the production efficiency is low due to the fact that the mode of stopping the machine for manual feeding is still adopted in most production modes are solved. After the high-viscosity silicone oil is prepared into the ointment, the state of the high-viscosity silicone oil is solid, so that the solid ointment and the crude rubber can be simultaneously added and delivered to a kneader without manual midway feeding, the production efficiency is greatly improved, and the production cost of equipment cannot be increased.
According to a second aspect of the present application, there is provided a rubber composition prepared by the method of preparing a rubber composition according to the first aspect.
The technical scheme adopted by the invention can achieve the following beneficial effects:
1) according to the method for preparing the rubber compound, high-viscosity silicone oil such as high-vinyl silicone oil or low-viscosity silicone oil such as hydrogen-containing silicone oil is prepared into solid ointment, so that the original liquid is changed into solid ointment, the required weight is cut in advance according to the production requirement, the solid ointment can be simultaneously added into a kneader when raw rubber is added, the problem that an automatic oil adding system is inconvenient to add high-viscosity silicone oil in the prior art (the problems of low efficiency, high cost and the like) is solved, the problem that the production efficiency is low because the manual adding mode is still adopted in most production modes in the midway is solved, and the production cost of equipment is not increased. The ointment has simple application method and convenient preparation. In the existing production process, the oil is required to be manually thrown in a midway halt mode, so that the production efficiency is influenced; after the method is adopted, the manual oil feeding step can be omitted, and the production efficiency is improved.
2) Compared with the prior art, the method can save 2-3 hours of manual oil injection time every day, and can be used for normal production, thereby increasing the productivity and reducing the production errors caused by manual operation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to be exhaustive or exhaustive. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present application, there is provided a method of preparing a rubber compound, including the steps of: a) preparing a first mixture containing raw rubber, first silicone oil and white carbon black into a solid ointment; b) mixing a second mixture containing the solid ointment, the crude rubber and the white carbon black to prepare a mixed rubber; wherein, in the step a), a kneader is used for uniformly mixing a first mixture containing the raw rubber, the first silicone oil and the white carbon black; wherein, the technological parameters in the mixing process comprise: mixing temperature: 25-80 ℃; mixing time: 1-1.5 hours; kneading frequency of the kneader: 20-50 Hz; in this step, the first mixture comprises: 50-200 parts of raw rubber, 50-200 parts of first silicone oil and 50-200 parts of white carbon black. In the step b), the solid ointment and the crude rubber are simultaneously added into a kneader, and a second mixture containing the solid ointment, the crude rubber and the white carbon black is mixed in the kneader.
Wherein, the raw rubber in the step a) and the step b) can be selected from methyl vinyl silicone rubber, the first silicone oil comprises high-viscosity silicone oil and/or low-viscosity silicone oil, and the high-viscosity silicone oil comprises at least one of high vinyl silicone oil and polyvinyl silicone oil; the low-viscosity silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxyl silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil; the white carbon black in the step a) and the step b) may respectively include at least one of precipitated white carbon black and gas-phase white carbon black.
According to another embodiment of the present application, the first mixture may further include 2-20 parts by weight of a structural control agent including at least one of hydroxy silicone oil, methoxy silicone oil, dimethyl dimethoxy silicone oil and silazane.
According to another embodiment of the present application, the second mixture in step b) further comprises a second silicone oil, the second silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil, and the second silicone oil can be fed into the kneader through an automatic oil feeding system.
The technical solutions disclosed in the embodiments of the present invention will be described in detail below.
Example 1
a) 50g of raw rubber (methyl vinyl silicone rubber), 100g of high vinyl silicone oil, 2g of hydroxyl silicone oil and 200g of precipitated white carbon black are weighed respectively according to the weight, and the weighed raw materials are put into a kneader according to the proportion. In the mixing process, the kneader process parameters are set as follows: mixing temperature: 25 ℃; mixing time: 1.5 hours; kneading frequency of the kneader: 30 Hz; mixing, and making into solid ointment;
b) according to production requirements, weighing raw rubber, precipitated white carbon black, silicon oil and the solid ointment prepared in the step a) in advance according to a formula proportion, adding the solid ointment into a kneader simultaneously during raw rubber feeding, feeding the silicon oil by using an automatic oil feeding system, feeding the precipitated white carbon black by using an automatic powder feeding system, and then mixing a mixture containing the solid ointment, the raw rubber, the precipitated white carbon black and the silicon oil in the kneader to prepare the mixed silicon rubber. The silicone oil in the step b) can be one or a combination of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil.
Example 2
a) Respectively weighing 200g of raw rubber (methyl vinyl silicone rubber), 200g of polyvinyl silicone oil, 10g of methoxy silicone oil and 100g of fumed silica according to the weight, and putting the weighed raw materials into a kneader according to the proportion. In the mixing process, the kneader process parameters are set as follows: mixing temperature: 50 ℃; mixing time: 1 hour; kneading frequency of the kneader: 50 Hz; mixing, and making into solid ointment;
b) according to production requirements, raw rubber, fumed silica, silicon oil and the solid ointment prepared in the step a) are weighed in advance according to a formula proportion, the solid ointment is simultaneously added into a kneader when the raw rubber is put into the kneader, the silicon oil is added by an automatic oil adding system, the fumed silica is added by an automatic powder adding system, and then a mixture containing the solid ointment, the raw rubber, the fumed silica and the silicon oil is mixed in the kneader to prepare the mixed silicon rubber. The silicone oil in the step b) can be one or a combination of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil.
Example 3
a) 100g of raw rubber (methyl vinyl silicone rubber), 50g of high vinyl silicone oil, 20g of silazane and 50g of precipitated white carbon black are weighed respectively according to the weight, and the weighed raw materials are put into a kneader according to the proportion. In the mixing process, the kneader process parameters are set as follows: mixing temperature: 80 ℃; mixing time: 1.2 hours; kneading frequency of the kneader: 20 Hz; mixing, and making into solid ointment;
b) according to production requirements, weighing raw rubber, precipitated white carbon black, silicon oil and the solid ointment prepared in the step a) in advance according to a formula proportion, adding the solid ointment into a kneader simultaneously during raw rubber feeding, feeding the silicon oil by using an automatic oil feeding system, feeding the precipitated white carbon black by using an automatic powder feeding system, and then mixing a mixture containing the solid ointment, the raw rubber, the precipitated white carbon black and the silicon oil in the kneader to prepare the mixed silicon rubber. The silicone oil in the step b) can be one or a combination of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil.
According to the rubber compound preparation method provided by the invention, high-viscosity silicone oil such as high-vinyl silicone oil or low-viscosity silicone oil such as hydrogen-containing silicone oil is prepared into solid ointment, so that the original liquid is changed into a solid ointment, the required weight is cut in advance according to the production requirement, the raw rubber can be simultaneously put into a kneader when being added, the manual oil adding in the process of production is not needed, the risk that the silicone oil leaks along the gap of equipment before the white carbon black is not added is avoided, the production efficiency is greatly improved, the problems that the silicone oil is inconvenient to be added by an automatic oil adding system and has high viscosity (low efficiency, high cost and the like) in the prior art are solved, the problem of low production efficiency caused by the fact that the manual adding mode is still adopted in most production modes, and the production cost of the equipment is not increased. Compared with the prior art, the method can save the manual oil feeding time of 2-3 hours every day, and can be used for normal production, thereby increasing the productivity and reducing the production errors of manual operation.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A method for preparing a rubber compound is characterized by comprising the following steps:
a) preparing a first mixture containing raw rubber, first silicone oil and white carbon black into a solid ointment;
b) mixing a second mixture containing the solid ointment, the crude rubber and the white carbon black to prepare a rubber compound;
wherein, in step b), the solid ointment and the raw gelatin are simultaneously added together.
2. A method for preparing a mix as claimed in claim 1, characterized in that said first mixture comprises:
50-200 parts of raw rubber, 50-200 parts of first silicone oil and 50-200 parts of white carbon black.
3. A method for preparing a mix as claimed in claim 2, characterized in that said first mixture further comprises 2-20 parts by weight of a structuring control agent;
the structural control agent comprises at least one of hydroxyl silicone oil, methoxy silicone oil, dimethyl dimethoxy silicone oil and silazane.
4. A method for preparing a rubber mix as claimed in claim 1, wherein said raw rubber in steps a) and b) is selected from methyl vinyl silicone rubber.
5. A method of preparing a mix as claimed in claim 1, characterised in that said first silicone oil comprises a high-viscosity silicone oil and/or a low-viscosity silicone oil.
6. A rubber compound preparation method as claimed in claim 5, wherein said high-viscosity silicone oil includes at least one of a high-vinyl silicone oil and a polyvinyl silicone oil;
the low-viscosity silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil.
7. A method for producing a rubber composition as claimed in claim 1, wherein said white carbon black in step a) and step b) includes at least one of precipitated white carbon black and fumed white carbon black, respectively.
8. A method of preparing a mix as claimed in claim 1, characterized in that said second mixture also comprises a second silicone oil;
the second silicone oil comprises at least one of hydrogen-containing silicone oil, hydroxyl silicone oil, methoxy silicone oil, dimethyl silicone oil and vinyl hydroxyl silicone oil;
and adding the second silicone oil through an automatic oil adding system.
9. A method for producing a rubber composition according to claim 1, wherein in step a), a first mixture containing raw rubber, first silicone oil and white carbon is uniformly mixed using a kneader;
wherein, the technological parameters in the mixing process comprise:
mixing temperature: 25-80 ℃;
mixing time: 1-1.5 hours;
kneading frequency of the kneader: 20-50 Hz;
in the step b), the solid ointment and the crude rubber are simultaneously added into a kneader, and a second mixture containing the solid ointment, the crude rubber and the white carbon black is mixed in the kneader.
10. A rubber composition prepared by the method of any one of claims 1 to 9.
CN202210700020.4A 2022-06-20 2022-06-20 Rubber compound and preparation method thereof Pending CN115093706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210700020.4A CN115093706A (en) 2022-06-20 2022-06-20 Rubber compound and preparation method thereof

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Application Number Priority Date Filing Date Title
CN202210700020.4A CN115093706A (en) 2022-06-20 2022-06-20 Rubber compound and preparation method thereof

Publications (1)

Publication Number Publication Date
CN115093706A true CN115093706A (en) 2022-09-23

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Application Number Title Priority Date Filing Date
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104908171A (en) * 2015-06-25 2015-09-16 东爵有机硅(南京)有限公司 Preparation method of mixed silicon rubber
WO2022017200A1 (en) * 2020-07-22 2022-01-27 江东金具设备有限公司 Silicone rubber material for composite insulator and preparation method therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104908171A (en) * 2015-06-25 2015-09-16 东爵有机硅(南京)有限公司 Preparation method of mixed silicon rubber
WO2022017200A1 (en) * 2020-07-22 2022-01-27 江东金具设备有限公司 Silicone rubber material for composite insulator and preparation method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
来国桥等, 化学工业出版社 *

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