Polymer processing process aid and preparation process thereof

Abstract

The invention discloses a polymer processing process auxiliary agent and a preparation technology thereof, and belongs to the technical field of polymer processing. The invention relates to a polymer processing process auxiliary agent, which comprises the following components: 10-45% of a fluoroolefin polymer, 1-10% of a dispersant, 55-70% of an organic solvent, and 1% of a functional auxiliary agent. Through the selection of a special dispersing agent and solvent system and the treatment of a sand mill, the particle size of effective components is small, the storage stability is good, the compatibility is good, various other functional aids can be compounded, the comprehensive performance of a polymer product is improved, and compared with 1.5%-2% of traditional PPA master batch, the addition amount of processing aids in the polymer process is low, and the cost is low. The auxiliary agent for the polymer processing process, disclosed by the invention, has the advantages that the content of the auxiliary agent is only 0.05%-0.15%, the auxiliary agent has excellent process stability, the stability of a polymer forming process can be improved, the performance of a polymer product can be improved, and due to the characteristics and advantages, the auxiliary agent for the polymer processing process has very high application value and market prospect in the fields of film processing, extrusion blow molding and the like.

Description

Technical Field

[0001] The invention relates to the technical field of polymer processing, and in particular to a polymer processing additive and a preparation process thereof. Background Art

[0002] Polymer processing additives (PPA) are additives widely used in the polymer processing industry. Their main function is to improve the fluidity, surface smoothness and heat resistance during the processing process, so as to improve the polymer processing efficiency and product quality, thereby achieving an increase in production speed and capacity. In particular, the use of PPA in the film blowing and calendering production process can improve the smoothness of the surface of the processed material and reduce the die head temperature, thereby further improving production efficiency and quality.

[0003] Although PPA as a polymer processing additive has the advantages of increasing production speed, increasing production capacity, improving surface smoothness and reducing die head temperature, due to poor dispersibility of PPA, it cannot be evenly dispersed in polymer particles after mixing, and a large dose of PPA is required to achieve the desired effect, resulting in an increase in dosage and an increase in overall cost. Secondly, the prepared PPA masterbatch takes effect slowly during the processing process, and it may take a long time to achieve the best effect. In addition, the process has poor stability and is easily affected by changes in the processing process, making it difficult to ensure the consistency of the product. To this end, in response to this problem, the present invention proposes a polymer processing additive and a preparation process thereof. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of poor PPA dispersibility, high dosage, slow processing effect and poor process stability in the prior art, and to propose a polymer processing additive and its preparation process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A polymer processing additive comprises the following components: 10% to 45% of a fluoroolefin polymer, 1% to 10% of a dispersant, 55% to 70% of an organic solvent, and 1% of a functional additive.

[0007] Preferably, the fluoroolefin polymer is one or more of a single type of fluoroolefin polymer, a plurality of different types of fluoroolefin copolymers, and a copolymer of a fluoroolefin and an olefin.

[0008] Preferably, when the fluoroolefin polymer is a single type of fluoroolefin copolymer, the fluoroolefin polymer is a perfluoropropylene monomer or is copolymerized with a tetrafluoroethylene monomer and an ethylene monomer to obtain a copolymer composed of a fluoroolefin monomer and a non-fluoroolefin monomer. When the fluoroolefin polymer is a plurality of different types of fluoroolefin copolymers, the plurality of different types of fluoroolefin copolymers include copolymers of different types of monomers such as perfluoroolefins, semi-fluoroolefins, perhydroolefins and ethylene.

[0009] Preferably, the dispersant is one or more organic amine dispersants.

[0010] Preferably, when the dispersant is one of the organic amine dispersants, any one of aliphatic amine, aromatic amine or alkyl amine is selected as the dispersant, and when the dispersant is a plurality of groups of organic amine dispersants, any combination of aliphatic amine, aromatic amine and alkyl amine is included.

[0011] Preferably, the organic solvent is selected from one or more of white oil and polyisobutylene.

[0012] Preferably, the functional additive is selected from any one or more of antioxidants, light stabilizers, heat stabilizers, ultraviolet absorbers, antistatic agents, dripping agents, weathering agents, plasticizers, fillers, coupling agents, foaming agents, and colorants.

[0013] Preferably, when the functional auxiliary agent is selected from multiple types and is used to improve the chemical stability and durability of the material, it is selected from any one of a combination of an antioxidant, a light stabilizer and a heat stabilizer or a combination of an antioxidant, a light stabilizer and a UV absorber.

[0014] The present invention also provides a process for preparing a polymer processing additive, comprising the following steps:

[0015] S1. At room temperature, the organic solvent, dispersant, fluoroolefin polymer and functional additive are uniformly mixed to form a material;

[0016] S2. Use a sand mill to continuously grind the materials mixed uniformly in step S1 until the particle size of the fluoroolefin polymer is less than 5 μm and the average particle size is less than 600 nm.

[0017] Preferably, during the grinding process of step S2, the particle size of the grinding beads used is 0.8 mm to 2 mm, and the material temperature is controlled not to exceed 40°C.

[0018] Compared with the prior art, the present invention provides a polymer processing additive having the following beneficial effects:

[0019] The polymer processing aid has a small effective component particle size, good storage stability and good compatibility through the selection of a special dispersant and solvent system and sand mill processing, and can be compounded with a variety of other functional additives to improve the comprehensive performance of polymer products. Compared with the traditional PPA masterbatch addition amount of 1.5% to 2%, the polymer processing aid of the present invention has a low addition amount of only 0.05% to 0.15%, and has excellent process stability, which can improve the stability of the polymer molding process and improve the performance of the polymer product. These characteristics and advantages make the polymer processing aid of the present invention have high application value and market prospects in the fields of film processing, extrusion blow molding, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the components of a polymer processing aid proposed by the present invention;

[0021] Figure 2 A schematic diagram of a preparation process of a polymer processing aid proposed by the present invention;

[0022] Figure 3 The present invention is a flow chart of a process for preparing a polymer processing additive. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Embodiment 1

[0026] Reference Figure 1-Figure 3 , a polymer processing aid, comprising the following components:

[0027] Fluoroolefin polymer: 10% of the total amount. The fluoroolefin polymer may be a single type of fluoroolefin polymer. When the fluoroolefin polymer is a single type of fluoroolefin copolymer, for example, it is a polymer obtained by copolymerization of perfluoropropylene monomer and ethylene monomer.

[0028] Dispersant: accounting for 1% of the total amount, which can be one of the organic amine dispersants, such as fatty amine as a dispersant, because this dispersant can help the polymer processing aid to be evenly dispersed in the polymer particles.

[0029] Organic solvent: accounting for 55% of the total amount, white oil can be selected as the organic solvent, because white oil has good solubility and stability, and can effectively dissolve polymer processing aids.

[0030] Functional additives: accounting for 1% of the total amount, can be any one of antioxidants, light stabilizers, heat stabilizers, UV absorbers, antistatic agents, dripping agents, weathering agents, plasticizers, fillers, coupling agents, foaming agents, colorants, etc. The selection of these functional additives can be based on specific needs. For example, if you need to improve the weather resistance and UV stability of the material during polymer processing, you can choose UV absorbers as functional additives. UV absorbers can absorb UV radiation to prevent damage to polymer materials and extend their service life. In addition, if you want to increase the flexibility and processability of the material, you can choose plasticizers as functional additives. Plasticizers The agent can improve the fluidity and softness of the polymer, making it easier to process and shape, and improve its plasticity and tensile properties. At the same time, if it is necessary to improve the heat resistance and thermal stability of the material, a heat stabilizer can be selected as a functional additive. The heat stabilizer can inhibit the thermal degradation process, reduce the decomposition and degradation of the polymer at high temperature, and maintain the performance stability of the material. In addition, according to specific needs, other functional additives can also be selected, such as antioxidants, antistatic agents, weathering agents, fillers, coupling agents, foaming agents, colorants, etc. These functional additives can provide a variety of performance enhancements and improvements to meet the needs of different application fields for improving the performance and stability of polymers.

[0031] The purpose of such a technical solution is to ensure that the components of the additive are carefully selected and proportioned, which can improve the material properties during polymer processing and improve the stability of the processing technology. It has a wide range of applications and is suitable for film processing, extrusion blow molding and other fields.

[0032] Embodiment 2

[0033] Reference Figure 1-Figure 3 In a preferred embodiment, a polymer processing aid comprises the following components:

[0034] Fluoroolefin polymers: accounting for 30% of the total. Such fluoroolefin polymers can be copolymers of different types of fluoroolefins, or copolymers of fluoroolefins and olefins. When the fluoroolefin polymers are copolymers of different types of fluoroolefins, they include copolymers of different types of monomers such as perfluoroolefins, semi-fluoroolefins, perhydroolefins and ethylene. Such fluoroolefin polymers can improve the high temperature resistance, flame retardancy and chemical corrosion resistance of the polymer.

[0035] Dispersant: 5% of the total amount, using a variety of organic amine dispersants, including aromatic amines and alkyl amines, can enhance the compatibility and dispersibility of polymer processing aids with polymer particles.

[0036] Organic solvent: accounting for 65% of the total amount, white oil is selected as the organic solvent, which has good solubility and stability, and can effectively dissolve the polymer processing aid and make it evenly dispersed in the polymer.

[0037] Functional additives: accounting for 1% of the total amount, which can be a combination of antioxidants, light stabilizers, heat stabilizers, UV absorbers, antistatic agents, dripping agents, weathering agents, plasticizers, fillers, coupling agents, foaming agents, colorants, etc. When there are multiple functional additives and they are used to improve the chemical stability and durability of the material, antioxidants, light stabilizers and heat stabilizers can be selected to combine to improve the antioxidant properties, UV resistance and high temperature resistance of the polymer material.

[0038] The use of such a technical solution has the advantages of improving material properties and enhancing the stability of processing technology. Its main components include 30% of fluoroolefin polymers, 5% of various organic amine dispersants, 65% of white oil organic solvents, and 1% of various functional additives. This solution can provide the required performance in high temperature environments, including higher high temperature resistance, flame retardancy and chemical stability. The addition of fluoroolefin polymers can improve the stability and flame retardancy of the material, the organic amine dispersants can improve the compatibility and dispersibility of the additives with polymer particles, the white oil organic solvent can effectively dissolve the additives and improve the processing performance and stability of the material, and the combined use of various functional additives further improves the heat resistance, oxidation resistance and long-term use stability of the material. For example, when developing high-temperature and heat-resistant plastic materials, it can enable them to have excellent performance and durability.

[0039] Embodiment 3

[0040] Reference Figure 1-Figure 3 In a preferred embodiment, a polymer processing aid comprises the following components:

[0041] Fluoroolefin polymers: accounting for 45% of the total. Such fluoroolefin polymers may be copolymers of different types of fluoroolefins, or copolymers of fluoroolefins and olefins. When the fluoroolefin polymers are copolymers of different types of fluoroolefins, they are copolymerized with different types of monomers such as perfluoroolefins, semifluoroolefins, perhydroolefins and ethylene.

[0042] Dispersant: accounting for 10% of the total amount, which can be a variety of organic amine dispersants. When a combination of organic amine dispersants is selected, aliphatic amines and aromatic amines can be included in combination, which helps to improve the compatibility and dispersibility of the additive and the polymer particles.

[0043] Organic solvent: accounting for 70% of the total amount. Polyisobutylene is selected as the organic solvent because polyisobutylene has good solubility and stability, can effectively dissolve the additives and improve the processing performance and stability of the material.

[0044] Functional additives: accounting for 1% of the total amount, which can be a combination of antioxidants, light stabilizers, heat stabilizers, UV absorbers, antistatic agents, dripping agents, weathering agents, plasticizers, fillers, coupling agents, foaming agents, colorants, etc. When there are multiple functional additives and they are used to improve the chemical stability and durability of the material, antioxidants, light stabilizers and UV absorbers can be selected to combine.

[0045] By adopting such a technical scheme, the performance of the material can be improved according to specific needs, including chemical stability, heat resistance, UV resistance and weather resistance, etc. Through careful combination selection, the comprehensive utilization of different monomers and functions is achieved to improve the comprehensive performance and application range of the material. Compared with the above two schemes, the main difference of this preferred polymer processing aid scheme lies in the proportion and selection range of each component. In this technical scheme, the fluoroolefin polymer accounts for 45% of the total, the dispersant accounts for 10% of the total, the organic solvent accounts for 70% of the total, and the functional additive accounts for 1% of the total. In addition, the selection range of functional additives is wider, which can cover a variety of different types of additives, such as antioxidants, light stabilizers, heat stabilizers, ultraviolet absorbers, etc. In addition, for the selection of fluoroolefin polymers, this scheme emphasizes that it can be different types of fluoroolefin copolymers or copolymers of fluoroolefins and olefins, while in the previous scheme, only fluoroolefin copolymers were mentioned. Overall, this preferred polymer processing aid scheme provides a more flexible and wide range of component ratios. By adjusting the proportion of each component and selecting different functional additives, more diverse performance improvements and application needs can be achieved.

[0046] The overall design of the polymer processing aids mentioned above is mainly to provide an efficient and flexible method to improve the performance of polymer materials. Through reasonable component ratios and selection ranges, this solution can provide multiple performance enhancements and optimizations for different application requirements. First, fluoroolefin polymers are selected as one of the main components. This polymer has good heat resistance and oxidation resistance, and can provide the required stability and flame retardancy of the material under high temperature conditions. Secondly, dispersants are added to improve the compatibility and dispersibility of the additives and polymer particles, so that the additives can be evenly dispersed in the polymer to achieve better performance improvement effects. The choice of organic solvents can affect the dissolution of the additives and the processing properties of the materials. Polyisobutylene as an organic solvent has good solubility and stability, can effectively dissolve the additives, and improve the processing ability and stability of the materials. Finally, the addition of functional additives can further improve the chemical stability and durability of the materials. Different types of functional additives can provide comprehensive solutions for various problems that may be encountered during the use of the materials, such as oxidation resistance, light stability, ultraviolet absorption, antistatic, etc.

[0047] In general, the overall design of the above preferred polymer processing aid solutions is aimed at providing flexible and efficient tools for polymer material development. Through precise component ratios and a wide range of choices, different application requirements can be met, the performance of the material can be improved, and it can be made more suitable for components and applications in various high-temperature environments.

[0048] Reference Figure 1-Figure 3 The present invention also provides a process for preparing a polymer processing additive, comprising the following steps:

[0049] S1. At room temperature, the organic solvent, dispersant, fluoroolefin polymer and functional additive are uniformly mixed to form a material;

[0050] S2. Use a sand mill to continuously grind the materials mixed uniformly in step S1 until the particle size of the fluoroolefin polymer is less than 5 μm and the average particle size is less than 600 nm.

[0051] Preferably, during the grinding process of step S2, the particle size of the grinding beads used is 0.8 mm to 2 mm, and the material temperature is controlled not to exceed 40°C.

[0052] In the preparation process of the present invention, the fluoroolefin polymers in the polymer processing aid can be finely divided and distributed more evenly through uniform mixing and grinding. These small fluoroolefin polymers can better penetrate into the polymer particles and provide more surface area, thereby improving the dispersibility and compatibility of the additive in the polymer.

[0053] In addition, the fluoroolefin polymer with small particle size is formed by grinding, which can enhance the interaction between the additive and the polymer particles, help reduce the precipitation and agglomeration of the polymer particles, and thus improve the stability and controllability of the additive in the composition.

[0054] Moreover, the small-particle fluoroolefin polymer obtained by the preparation process can provide more surface area for the composition, thereby better exposing a large area to the surface of the material, making the surface of the composition more uniform, improving the performance and stability of the polymer material, and providing more opportunities for organic dispersants and functional additives to contact with adsorbable molecules during the grinding process, thereby improving their effectiveness and the dispersion effect of the additives.

[0055] In general, the uniform mixing and grinding treatment in this preparation process can achieve the refinement and uniform distribution of fluoroolefin polymers, enhance the dispersion and compatibility of additives in polymer particles, and improve the processing performance and stability of materials. At the same time, this preparation process can accurately control the particle size of fluoroolefin polymers in the additives, thereby further improving the quality stability of the additives, and can achieve the desired surface properties and performance improvement effects. Compared with the traditional processing additive preparation process, this preparation process can better meet the requirements for additives in the polymer processing process and improve the quality and performance of the products.

[0056] It should be noted that the uniform mixing mentioned in the preparation process of the present invention refers to thoroughly mixing multiple components to achieve uniform dispersion of the components at the microscopic level. The purpose of this step is to ensure sufficient contact and mixing between the various components to form a uniform system, which is usually achieved by stirring, agitators, high-speed stirrers or other mixing equipment.

[0057] Grinding treatment refers to the use of tools such as sand mills, ball mills, and stirred mills to grind the mixed materials to reduce the particle size of the components and further improve the mixing uniformity. Through grinding, the particles in the material will rub and collide with the grinding beads or abrasives, so that the components are evenly dispersed and refined into smaller particles. During the grinding process, the parameters such as the particle size of the grinding beads, grinding time and grinding speed can be adjusted to control the desired particle size. Therefore, under uniform mixing and grinding treatment, the particle size of the components can be reduced to a smaller size, and the uniform dispersion and compatibility of the components can be improved, which helps to improve the interaction and dispersion between the components and improve the performance and stability of the materials. In addition, grinding treatment can also increase the surface area of ​​the material and increase the contact opportunities of each component with other substances, further improving the dispersion effect and compatibility. This treatment method can improve the material properties when preparing materials such as polymer processing aids, and improve their processing performance and stability.

[0058] In addition, the particle size of the grinding beads used is 0.8mm~2mm, which is determined according to the required grinding effect. Smaller grinding bead particle size can provide higher shear force and collision force, and it is easier to grind and refine the material. However, too small grinding bead particle size may cause the problem of grinding bead accumulation and clogging. While considering the balance between grinding effect and mechanical damage, selecting a grinding bead particle size range of 0.8mm~2mm can usually achieve a better grinding and refinement effect. The material temperature is controlled not to exceed 40℃ because friction and collision will generate heat during the grinding process. If the heat cannot be effectively dissipated, the material temperature may rise. Excessive temperature may have an adverse effect on the material, such as initiating chemical reactions, reducing material stability, changing material properties, etc. Therefore, during the grinding process, limiting the material temperature to no more than 40℃ is to avoid the negative impact of excessive temperature on the material. This design is to achieve effective grinding effects during the grinding process and ensure that the material is not damaged by excessive temperature, so that the grinding process can be better controlled and the dispersion, stability and processing performance of the material can be improved.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A polymer processing aid, characterized in that: Contains the following ingredients: Fluoroolefin polymer 10% to 45%; Dispersant 1% to 10%; Organic solvent 55% to 70%; Functional additive 1%.

2. A polymer processing aid according to claim 1, characterized in that: The fluoroolefin polymer is one or more of a single type of fluoroolefin polymer, a plurality of different types of fluoroolefin copolymers, and a copolymer of a fluoroolefin and an olefin.

3. A polymer processing aid according to claim 2, characterized in that: When the fluoroolefin polymer is a single type of fluoroolefin copolymer, the fluoroolefin polymer is a perfluoropropylene monomer or is copolymerized with a tetrafluoroethylene monomer and an ethylene monomer to obtain a copolymer composed of a fluoroolefin monomer and a non-fluoroolefin monomer; When the fluoroolefin polymer is a plurality of different types of fluoroolefin copolymers, the plurality of different types of fluoroolefin copolymers include copolymers of different types of monomers such as perfluoroolefin, semifluoroolefin, perhydroolefin and ethylene.

4. A polymer processing aid according to claim 1, characterized in that: The dispersant is one or more organic amine dispersants.

5. A polymer processing aid according to claim 4, characterized in that: When the dispersant is an organic amine dispersant, any one of aliphatic amine, aromatic amine or alkyl amine is selected as the dispersant; When the dispersant is a plurality of groups of organic amine dispersants, it includes any combination of aliphatic amines, aromatic amines and alkyl amines.

6. A polymer processing aid according to claim 1, characterized in that: The organic solvent is selected from one or more of white oil and polyisobutylene.

7. A polymer processing aid according to claim 1, characterized in that: The functional additive is selected from any one or more of antioxidants, light stabilizers, heat stabilizers, ultraviolet absorbers, antistatic agents, dripping agents, weathering agents, plasticizers, fillers, coupling agents, foaming agents, and colorants.

8. A polymer processing aid according to claim 7, characterized in that: When the functional additive is selected from multiple types and is used to improve the chemical stability and durability of the material, it is selected from any one of a combination of an antioxidant, a light stabilizer and a heat stabilizer or a combination of an antioxidant, a light stabilizer and an ultraviolet absorber.

9. A process for preparing a polymer processing aid, applicable to the polymer processing aid according to claim 1, characterized in that: The following steps are involved: S1. At room temperature, the organic solvent, dispersant, fluoroolefin polymer and functional additive are uniformly mixed to form a material; S2. Use a sand mill to continuously grind the materials mixed uniformly in step S1 until the particle size of the fluoroolefin polymer is less than 5 μm and the average particle size is less than 600 nm.

10. The process for preparing a polymer processing aid according to claim 9, characterized in that: In the grinding process of step S2, the particle size of the grinding beads used is 0.8 mm to 2 mm, and the material temperature is controlled not to exceed 40°C.

Images