CN111825916A - Composite auxiliary agent and preparation method thereof - Google Patents
Composite auxiliary agent and preparation method thereof Download PDFInfo
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- CN111825916A CN111825916A CN201910299118.1A CN201910299118A CN111825916A CN 111825916 A CN111825916 A CN 111825916A CN 201910299118 A CN201910299118 A CN 201910299118A CN 111825916 A CN111825916 A CN 111825916A
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- 239000002131 composite material Substances 0.000 title claims abstract description 83
- 239000012752 auxiliary agent Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 72
- -1 polypropylene Polymers 0.000 claims abstract description 69
- 230000000996 additive effect Effects 0.000 claims abstract description 65
- 239000002245 particle Substances 0.000 claims abstract description 60
- 229920000642 polymer Polymers 0.000 claims abstract description 51
- 239000004743 Polypropylene Substances 0.000 claims abstract description 49
- 229920001155 polypropylene Polymers 0.000 claims abstract description 49
- 238000002844 melting Methods 0.000 claims abstract description 46
- 230000008018 melting Effects 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- 229920000573 polyethylene Polymers 0.000 claims abstract description 19
- 229920000098 polyolefin Polymers 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 9
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical group CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 238000005469 granulation Methods 0.000 claims description 19
- 230000003179 granulation Effects 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011238 particulate composite Substances 0.000 claims description 15
- 238000007909 melt granulation Methods 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000008188 pellet Substances 0.000 claims description 5
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 4
- 239000003242 anti bacterial agent Substances 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 239000002216 antistatic agent Substances 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 4
- 229960001545 hydrotalcite Drugs 0.000 claims description 4
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 4
- 239000002952 polymeric resin Substances 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 claims description 2
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004611 light stabiliser Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000002671 adjuvant Substances 0.000 claims 6
- 239000001993 wax Substances 0.000 claims 2
- 239000008187 granular material Substances 0.000 abstract description 32
- 229940075507 glyceryl monostearate Drugs 0.000 description 20
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 description 20
- 239000002994 raw material Substances 0.000 description 18
- 238000009826 distribution Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 241000219000 Populus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004597 plastic additive Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
Landscapes
- 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)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to a composite additive and a preparation method thereof, wherein the composite additive comprises a carrier and an additive, the additive comprises a low-melting-point additive with a melting point lower than 90 ℃, and the weight ratio of the additive to the carrier is 1: (0.1-10), the average particle diameter D90 of the particles of the composite auxiliary agent is more than or equal to 1mm, wherein the carrier is polymer, and the polymer is solid which is not melted in the process of preparing the granular composite auxiliary agent. The composite additive of the invention adopts polypropylene, polyethylene or polyolefin wax as a carrier, realizes the uniform mixing of various components in the composite additive, and the carrier in the prepared granular composite additive is a solid which is not melted, so that the granular composite additive can be fully and uniformly mixed in the process of melting and granulating polyolefin granules.
Description
Technical Field
The invention belongs to the field of plastic additives, and particularly relates to an additive product capable of improving the processing efficiency and quality of plastics and application thereof. In particular to a composite additive and a preparation method thereof.
Background
In the process of preparing polypropylene or polyethylene particles, when the low-melting-point auxiliary agent is added into a polymer, the content of the low-melting-point auxiliary agent is difficult to increase, the hardness of the low-melting-point auxiliary agent is too high due to excessive addition, and when the powdery auxiliary agent is added, the powdery auxiliary agent is difficult to be uniformly mixed with other auxiliary agents, so that the mass distribution of the auxiliary agent in the prepared polymer is not uniform.
In the prior art, a plurality of auxiliaries are generally mixed and prepared into particles for adding, but the addition of the conventional binder causes the addition of unnecessary components to influence the unknown poor performance of the polymer, so that no better method for solving the problem of preparing the particles by using the plurality of auxiliaries exists at present.
In the process of preparing polymer granules or polymer products, if the particle sizes of various raw materials are not matched or the melting points are too different, the feeding is difficult or a feed inlet is blocked, and the dispersibility in the granulating process is poor. Sometimes, if the content of the auxiliary agent to be added is too high, the dispersion cannot be sufficiently achieved due to the auxiliary agent itself. The addition of the polymer additive is facilitated by forming the additive into particles, but the problems that the single organic powder and inorganic powder cannot be granulated frequently and the like are always problems in the use process of the polymer additive.
The polymer is used as the carrier of the composite auxiliary agent, so that the preparation problem of particles is solved, and the problem that the content of the auxiliary agent with related performance in the polymer is increased or the dispersion performance of the auxiliary agent is improved is solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a granular composite additive, which is characterized by comprising a carrier and an additive, wherein the additive comprises a low-melting-point additive with a melting point lower than 90 ℃, and the weight ratio of the low-melting-point additive to the carrier is 1: (0.1-10), the average particle diameter D90 of the particles of the granular composite auxiliary agent is more than or equal to 1mm, wherein the carrier is polymer, and the polymer is solid which is not melted in the process of preparing the granular composite auxiliary agent.
The term "solid which is not melted during the preparation of the particulate composite assistant" means a solid polymer in which the polymer in the particulate composite assistant is not substantially melted after a certain temperature during the preparation of the composite assistant, that is, the polymer does not reach a melting temperature during the preparation of the composite assistant, and the concept of substantially not melting is that if there is a partial melting of the polymer, the minimal portion of the polymer is generally not more than 10% by weight of the polymer, and particularly preferably not more than 5% by weight of the polymer.
In the process of preparing the granular composite assistant, the polymer used as a carrier is not in a liquid state from the raw materials to the process of preparing the granular composite assistant, namely, the shape of most of the polymer raw materials is basically kept in an original state in the whole preparation process of the granular composite assistant, and although the polymer in the granular composite assistant is solid, the polymer in the granular composite assistant is not subjected to a crystallization process from the liquid state to the solid state.
The granular composite assistant is prepared through mixing polymer carrier and low smelting point assistant, and pelletizing at temperature not higher than the smelting temperature of the polymer carrier, so that the hardness of the composite assistant is lower than that of the polymer cooled after smelting. Although the polymer carrier is not melted, the granular composite additive is ensured, the performance of the granular composite additive for preparing polyolefin granules by adding the granular composite additive into polyolefin can be more uniform, the granular composite additive is more fully mixed with polyolefin raw materials, and the polyolefin can be more fully mixed no matter the polyolefin is in a powder or granular state.
Preferably, in the above granular composite assistant, the polymer is one or more of polyethylene, polypropylene and polyolefin wax, and preferably, the polymer is one or two of polyethylene and polypropylene.
The low-melting-point assistant is an organic assistant, and preferably, the melting point temperature of the low-melting-point assistant is more than 35 ℃ and less than 90 ℃.
The particle size of the particulate composite assistant is such that it can satisfy the requirement of uniformity of the particulate composite assistant when it is mixed with other resin pellets or fed and mixed with raw materials, and is generally greater than 1mm in average particle size, although if the particle size of other assistant particles is increased accordingly, for example, when the average particle size D90 of other assistant particles is 2mm, the particle size of the particulate composite assistant of the present invention may be increased accordingly. Preferably, the particle diameter D90 of the particulate composite assistant is 2mm or more, and particularly preferably, the particle diameter D90 of the particulate composite assistant is 2mm or more and 8mm or less. Preferably, the particle diameter D90 of the particulate composite assistant is not less than 3mm and not more than 5 mm.
Preferably, in the granular composite additive, the weight ratio of the low-melting-point additive to the polymer is (1-3) to (2-9).
Preferably, in the above granular composite assistant, the low-melting-point assistant is one or more selected from antistatic agents, slipping agents, antioxidants, antibacterial agents and solubilizing agents, the melting point of which is lower than 90 ℃.
Preferably, in the above granular composite assistant, the antistatic agent is glycerol monostearate, and the slipping agent is selected from one or more of erucamide and oleamide.
Preferably, in the above granular composite assistant, the assistant further comprises a granular high-melting-point assistant with a melting point of not less than 90 ℃, and the weight ratio of the granular high-melting-point assistant to the carrier is 1: (0.1-10), and the average particle diameter D90 of the particles of the granular high-melting-point assistant is less than 1 mm.
Preferably, in the above-mentioned granular composite assistant, the granular high-melting-point assistant is selected from one or more of an opening agent with a melting point of not lower than 90 ℃, an acid absorbent, an antioxidant, an antibacterial agent, a lubricant, a compatibilizer (or called an interfacial agent), a light stabilizer and a filler, and the granular high-melting-point assistant is an organic assistant or an inorganic assistant, or a mixture of the organic assistant and the inorganic assistant.
Preferably, in the above granular composite assistant, the opening agent is silicon dioxide or talc powder, and the acid-absorbing agent is one or more of hydrotalcite, calcium stearate or zinc stearate.
The invention also provides a preparation method of the granular composite additive, which is characterized by comprising the following steps: mixing the carrier and the auxiliary agent into a mixture according to a proportion, then extruding and granulating the mixture, and controlling the discharge aperture of a granulator to obtain the granular composite auxiliary agent with the grain diameter D90 being more than or equal to 1 mm.
Preferably, in the above preparation method, no heating or heating is performed during the extrusion granulation, and the heating does not make the temperature of the mixed material lower than the melting point temperature of the carrier but equal to or higher than the melting point temperature of the low-melting-point assistant at any time during the process of mixing the powder and obtaining the granular composite assistant.
Preferably, the above preparation method is roller granulation, extrusion granulation or disc granulation.
The invention also provides the application of the granular composite additive, which is characterized in that the granular composite additive is used for improving the uniformity of the low-melting-point additive in the polymer resin or improving the mixing speed of the polymer resin and the low-melting-point additive. Since the addition rate of the low-melting point aid needs to be adjusted when the low-melting point aid is directly added to the polymer for melt granulation, if the addition rate is not uniform, the low-melting point aid is dissolved while the polymer is not dissolved, and the low-melting point aid is distributed unevenly due to the flow of the low-melting point aid.
The invention also provides a polymer granule which is characterized in that the polymer granule is obtained by mixing polyethylene or polypropylene with the granular composite auxiliary agent and then melting and granulating the mixture.
The invention also provides a polymer product, which is characterized by being prepared from the polymer granules.
The invention also provides polypropylene, polyethylene or polyolefin wax for improving the mixing uniformity of the low-melting-point assistant or the high-melting-point assistant in the polymer melting granulation process.
The invention realizes the beneficial effects
(1) The composite additive of the invention adopts polypropylene, polyethylene or polyolefin wax as a carrier, realizes the uniform mixing of various components in the composite additive, and the carrier in the prepared granular composite additive is a solid which is not melted, so that the granular composite additive can be fully and uniformly mixed in the process of melting and granulating polyolefin granules.
(2) The low-melting-point assistant can cause that the content of the low-melting-point assistant cannot be improved and the low-melting-point assistant is not uniformly distributed if the low-melting-point assistant is directly added in the process of preparing the polyolefin granules, and the problem that the content of the low-melting-point assistant cannot be improved and the problem that the low-melting-point assistant is not uniformly dispersed in the polymer are solved after the polypropylene, the polyethylene or the polyolefin wax is used as a carrier and is mixed with the low-melting-point assistant to prepare the granular composite assistant.
(3) By adopting polypropylene, polyethylene or polyolefin wax as a carrier, the addition of the high-melting-point assistant can be realized, because some high-melting-point assistants are powdery, uneven distribution can also be caused when the powder is mixed with granules, and the problem of uneven dispersion of the high-melting-point assistant is solved by directly adding the high-melting-point assistant into the granular composite assistant containing the low-melting-point assistant.
(4) If the carrier used by the composite additive is polyethylene, the granular composite additive obtained by granulating the carrier polyethylene in the non-melting process can be applied to polypropylene melting granulation or polyethylene melting granulation, but the granular composite additive obtained by granulating the carrier polyethylene in the non-melting process is difficult to be applied to polyethylene melting granulation to prepare granules.
Detailed Description
The raw materials used in the following examples were all commercially available, and each raw material was a qualified raw material in the field of polymer production.
Example 1: preparation of granular composite assistant and measurement of uniformity
And fully mixing the glyceryl monostearate and the polypropylene powder to prepare a mixture, inputting the mixture into a disc granulator for extrusion granulation, controlling the aperture and the mesh number of the disc granulator, selecting the disc aperture size from 4-18 meshes according to the particle size requirement of the granular composite additive, and then carrying out pressurization granulation at normal temperature to obtain the granular composite additive.
Then, the particle formability and the component uniformity of the granular composite additive are measured by the following method:
the method of measuring the particle moldability is to select 100 particles at random and then measure the particle diameter of the particles, and if the particle diameter D90 is within the particle diameter range, it is defined that the particle moldability is excellent, if the particle diameter D70 is within the particle diameter range, it is defined that the particle moldability is good, if the particle diameter D50 is within the particle diameter range, it is defined that the particle moldability is acceptable, and if the particle diameter satisfying the particle diameter range is less than 50%, it is defined that the particle moldability is poor.
The method for measuring the uniformity of the components comprises the steps of randomly selecting 1000 particles in the composite auxiliary agent particles, dividing the particles into 10 groups, measuring the weight percentage of the glyceryl monostearate in each group of particles, respectively comparing the weight percentage of the glyceryl monostearate in the 10 groups with the theoretical weight percentage of the glyceryl monostearate in the mixture, wherein the average value of absolute difference values is a percentage difference, the percentage difference is less than or equal to 1%, the uniformity of the components is defined to be excellent, if the percentage difference is greater than 1% and less than or equal to 3%, the uniformity of the components is defined to be good, if the percentage difference is greater than 3% and less than or equal to 5%, the uniformity of the components is defined to be qualified, and if the percentage difference is greater than 5%, the uniformity of the components is defined to be poor.
The composite aid particles were prepared by adjusting the weight of glyceryl monostearate and the weight of polypropylene powder according to the above method, respectively granulating with a disk having a 6 mesh size (particle size range of particle moldability of 3.0 to 3.5mm) and then measuring the particle moldability and component uniformity, as shown in Table 1 below.
TABLE 1 raw material proportions and Properties for the preparation of granular composite assistants
| Product number | Glyceryl monostearate (g) | Polypropylene powder (g) | Particle formability | Uniformity of composition |
| F1 | 950 | 50 | Qualified | Qualified |
| F2 | 900 | 100 | Good wine | Good wine |
| F3 | 800 | 200 | Superior food | Good wine |
| F4 | 700 | 300 | Superior food | Good wine |
| F5 | 600 | 400 | Superior food | Superior food |
| F6 | 500 | 500 | Superior food | Superior food |
| F7 | 400 | 600 | Superior food | Superior food |
| F8 | 300 | 700 | Superior food | Superior food |
| F9 | 200 | 800 | Superior food | Superior food |
| F10 | 100 | 900 | Superior food | Superior food |
| F11 | 50 | 950 | Superior food | Good wine |
As can be seen from Table 1, the particle moldability and the component uniformity both meet the acceptable standards when the weight ratio of the low-melting-point aid to the polypropylene is 1:19 to 19:1, the particle moldability and the component uniformity both meet the excellent standards when the weight ratio of the low-melting-point aid to the polypropylene is 1:9 to 9:1, and the component uniformity both meet the excellent standards when the weight ratio of the low-melting-point aid to the polypropylene is 1:9 to 3: 2.
According to the method, other auxiliary agents are added in the preparation process of the granular composite auxiliary agent, high-melting point silicon dioxide is selected as an auxiliary agent component, the number of the disc meshes of the disc granulation is 6 meshes (the particle size range of the granule forming property is 3.0-3.5mm), and then the granule forming property and the component uniformity are measured, and the specific preparation conditions of the granules are as follows:
TABLE 2 composite additives with addition of high melting point and low melting point additives
As can be seen from Table 2, the particle moldability and the component uniformity both meet the acceptable standards when the weight ratio of the total weight of the low-melting-point aid and the high-melting-point aid to the weight of polypropylene is 19:1 to 1:9, and the particle moldability and the component uniformity both meet the excellent standards when the weight ratio of the total weight of the low-melting-point aid and the high-melting-point aid to the weight of polypropylene is 1:4 to 4: 1.
Example 2 preparation of Polymer pellets and uniformity testing
And (3) respectively mixing the granular composite additives F1-F11, the contrast additive (the contrast additive is glyceryl monostearate powder) and the polypropylene powder to obtain a mixed raw material, wherein the total weight of the mixed raw material is 1000g, adding the mixed raw material into a double-shaft extrusion granulator, and heating, melting and granulating to obtain the glyceryl monostearate-containing polypropylene granules. In the mixed raw materials, the dosage ratio of the granular composite additive and the polypropylene powder ensures that the theoretical content of the glyceryl monostearate in the polypropylene granules is 5000ppm, the uniformity of the glyceryl monostearate in the polypropylene granules is detected aiming at the polypropylene granules, and the uniformity measuring method and the uniformity classification are as follows:
1) randomly selecting 30 master batches from the prepared polypropylene granules, randomly and averagely dividing the master batches into 10 groups, measuring the content of glyceryl monostearate in each group, respectively calculating the difference with the theoretical content (5000ppm) of the glyceryl monostearate in the polypropylene granules, adding the absolute values of all the differences, and then calculating the average to obtain the content difference number.
2) The number of content differences is within 1% (including 1%) of the theoretical content (5000ppm), the uniformity is defined as excellent, the uniformity is defined as good between 1% and 5% (including 5%) of the theoretical content, the uniformity is defined as qualified between 5% and 10% (including 10%) of the theoretical content, and the uniformity is defined as unqualified above 10% of the theoretical content.
The contrast aid is prepared by directly mixing glyceryl monostearate powder (without adding a carrier) and polypropylene powder and then performing melt granulation, and the granulation method is the same as the method for preparing the polypropylene granules by using the granular composite aid.
The following Table 3 shows the amount of raw materials used for melt granulation using product Nos. F1-F11 and the control additives and polypropylene powder, and the uniformity of glyceryl monostearate measured after granulation.
TABLE 3 melt granulation of polypropylene powders with compounding and control aids
From the above table 3, it can be seen that, when the granular composite additive is used for polypropylene melt granulation, the distribution uniformity of glyceryl monostearate in the polypropylene granules can be guaranteed to be qualified or above. Particularly, the excellent uniformity of the glyceryl monostearate in the polypropylene granules can be ensured under the condition of adopting the granular composite auxiliary agents F6-F11. And the polypropylene granules L-C01 obtained by directly using the melt granulation of the control additive are classified according to the uniformity grade of the invention, and the uniformity is unqualified.
The granular composite additives F12-F18 and the control additives (the control additives are glyceryl monostearate powder and silicon dioxide powder, and no carrier is added) are respectively mixed with polypropylene granules to obtain a mixed raw material, the total weight of the mixed raw material is 1000g, the mixed raw material is added into a double-shaft extrusion granulator and is heated and melted for granulation, the content of the glyceryl monostearate in the prepared polypropylene granules is 5000ppm, the content of the silicon dioxide is 5000ppm, the uniformity of the silicon dioxide in the polypropylene granules is detected aiming at the polypropylene granules, and the uniformity measuring method and the uniformity classification are as above.
The compound assistant F12-F18, a control poplar and polypropylene were used for melt granulation, and the dosage and uniformity of the raw materials are shown in Table 4 below.
TABLE 4 case of melt granulation of control aid and polypropylene granules using product Nos. F12-F18
The control assistant in Table 4 was a mixture of a glycerin monostearate powder and a silica powder, and the amounts of the control assistant added were 5g each, and the total amount was 10 g.
The results in table 4 show that the polypropylene granules prepared by using the composite additive can ensure that the uniformity of the distribution of silicon dioxide in the polypropylene granules is more than qualified. Particularly, the granular composite auxiliary agents F14-F18 are used for polypropylene melt granulation, and the distribution uniformity of silicon dioxide in polypropylene granules can be ensured to be more than good. Although the distribution uniformity of the silicon dioxide in the reference additive can reach the standard, the content difference is higher, and the uniformity is close to the standard according to the uniformity grading method of the invention.
According to the preparation method of the granular composite additive and the polypropylene melt granulation method, under the condition that polyethylene or polyolefin wax is used as a carrier to prepare the granular composite additive, the low-melting-point additive in the granular composite additive is selected from any one of glyceryl monostearate, erucamide and oleamide or two of glyceryl monostearate, erucamide and oleamide, and the high-melting-point additive is selected from any one of silicon dioxide, talcum powder, hydrotalcite, calcium stearate or zinc stearate or two of silicon dioxide, talcum powder, hydrotalcite, calcium stearate or zinc stearate, the particle formability and the component uniformity of the prepared granular composite additive reach above qualified grade, and the dispersion uniformity of the high-melting-point additive in the granules prepared by using the granular composite additive reaches above qualified grade, and the results are similar to those in tables 3 and 4, and are good and excellent in most cases, thereby verifying that the improvement of the uniformity of the composition of polymer pellets and articles can be achieved by the method for preparing a composite aid for a low-melting point aid and a high-melting point aid and the composite aid prepared thereby.
Claims (13)
1. The granular composite additive is characterized by comprising a carrier and an additive, wherein the additive comprises a low-melting-point additive with a melting point lower than 90 ℃, and the weight ratio of the additive to the carrier is 1: (0.1-10), the average particle diameter D90 of the particles of the granular composite auxiliary agent is more than or equal to 1mm, wherein the carrier is polymer, and the polymer is solid which is not melted in the process of preparing the granular composite auxiliary agent.
2. The granular composite adjuvant according to claim 1, characterized in that said polymer is one or more of polyethylene, polypropylene and polyolefin wax; preferably, the polymer is one or both of polyethylene and polypropylene.
3. The particulate composite adjuvant according to claim 1 or 2, wherein the low-melting point adjuvant is an organic adjuvant, preferably, the low-melting point adjuvant has a melting point temperature of more than 35 ℃ and less than 90 ℃.
4. The particulate composite assistant according to claim 1 or 2, wherein the particle diameter D90 of the particulate composite assistant is 2mm or more and 8mm or less.
5. The particulate composite additive according to claim 3 wherein the weight ratio of the low-melting point additive to the polymer is (1-3) to (2-9).
6. The granular composite additive according to claim 5, wherein the low-melting point additive is one or more selected from the group consisting of an antistatic agent having a melting point of less than 90 ℃, a slipping agent, an antioxidant, an antibacterial agent and a solubilizer, preferably, the antistatic agent is glycerol monostearate, and the slipping agent is one or more selected from the group consisting of erucamide and oleamide.
7. The granular composite assistant according to claim 1 or 2, wherein the assistant further comprises a granular high-melting-point assistant having a melting point of not less than 90 ℃, and the weight ratio of the granular high-melting-point assistant to the carrier is 1: (0.1-10), and the average particle diameter D90 of the particles of the granular high-melting-point assistant is less than 1 mm.
8. The granular composite assistant according to claim 7, wherein the granular high-melting-point assistant is selected from one or more of an opening agent with a melting point of not less than 90 ℃, an acid absorbent, an antioxidant, an antibacterial agent, a lubricant, a compatibilizer, a light stabilizer and a filler, and is an organic assistant or an inorganic assistant, or a mixture of the organic assistant and the inorganic assistant; preferably, the opening agent is silicon dioxide or talcum powder, and the acid-absorbing agent is one or more of hydrotalcite, calcium stearate or zinc stearate.
9. A process for the preparation of a particulate composite adjuvant according to any one of claims 1 to 8, characterised in that the process comprises the steps of: mixing a carrier and an auxiliary agent into a mixture according to a ratio, then extruding and granulating the mixture, and controlling the discharge aperture of a granulator to obtain the granular composite auxiliary agent with the grain diameter D90 being more than or equal to 1mm, preferably, heating or not heating is not carried out in the extrusion and granulation process, the temperature of the mixture is lower than the melting point temperature of the carrier but equal to or higher than the melting point temperature of the low-melting auxiliary agent at any time in the process of obtaining the granular composite auxiliary agent from the powder mixture by heating, and particularly preferably, the granulation method is roller granulation, extrusion granulation or disc granulation.
10. Use of the particulate composite aid according to any one of claims 1 to 8, wherein the particulate composite aid is used to increase the homogeneity of the low melting point aid in the polymer resin or to increase the mixing speed of the polymer resin with the low melting point aid.
11. A polymer pellet obtained by melt-granulating a mixture of polyethylene or polypropylene and the particulate compounding aid according to any one of claims 1 to 8.
12. A polymer article characterized by being prepared from the polymer pellets of claim 11.
13. Polypropylene, polyethylene or polyolefin waxes are used to improve the mixing homogeneity of the low melting point aid and/or the high melting point aid during the melt granulation of the polymer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549258A (en) * | 2021-07-22 | 2021-10-26 | 厦门驰麟科技有限公司 | Preparation method of chemical auxiliary agent and polyethylene polypropylene compound agent |
| WO2022207799A1 (en) * | 2021-03-31 | 2022-10-06 | Sabic Global Technologies B.V. | Polyolefin composition having improved antibacterial and antiviral properties. |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055936A (en) * | 1990-04-23 | 1991-11-06 | 伊斯曼柯达公司 | Can be scattered in solid additive in the water medium, its method for making and it is applied to method on the polymer beads |
| CN1056505A (en) * | 1990-05-14 | 1991-11-27 | 希蒙特公司 | The Nonextruded concentrates of additive, filler or pigment |
| CN1318581A (en) * | 2001-05-09 | 2001-10-24 | 广州石油化工总厂华穗实业公司 | Preparation method and equipment of polyolefine composite assistant |
| CN1358788A (en) * | 2002-01-18 | 2002-07-17 | 北京化工大学 | Method for preparing mother material from nano grade inorganic powder material |
| CN1388156A (en) * | 2002-06-03 | 2003-01-01 | 骆天荣 | Granular nano material as rubber stuffing and its prepn |
| CN1394223A (en) * | 2000-11-02 | 2003-01-29 | 旭电化工业株式会社 | Granular composite additive for polyolefin, process for producing the same, and polyolefin composition containing the same |
| CN1492903A (en) * | 2001-02-23 | 2004-04-28 | 阿尔伯麦尔公司 | Granular polymer additives and their preparation |
| WO2005078015A1 (en) * | 2004-02-16 | 2005-08-25 | Baerlocher Gmbh | Granular stabiliser compositions for polymers containing halogen and their production |
| CN1702104A (en) * | 2004-05-24 | 2005-11-30 | 杨宝柱 | Process for preparing column type polymer compound additives |
| CN102850686A (en) * | 2011-06-30 | 2013-01-02 | 陶氏巴西股份有限公司 | Process to prepare additive packages for use in PVC compounding |
-
2019
- 2019-04-15 CN CN201910299118.1A patent/CN111825916A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055936A (en) * | 1990-04-23 | 1991-11-06 | 伊斯曼柯达公司 | Can be scattered in solid additive in the water medium, its method for making and it is applied to method on the polymer beads |
| CN1056505A (en) * | 1990-05-14 | 1991-11-27 | 希蒙特公司 | The Nonextruded concentrates of additive, filler or pigment |
| CN1394223A (en) * | 2000-11-02 | 2003-01-29 | 旭电化工业株式会社 | Granular composite additive for polyolefin, process for producing the same, and polyolefin composition containing the same |
| CN1492903A (en) * | 2001-02-23 | 2004-04-28 | 阿尔伯麦尔公司 | Granular polymer additives and their preparation |
| CN1318581A (en) * | 2001-05-09 | 2001-10-24 | 广州石油化工总厂华穗实业公司 | Preparation method and equipment of polyolefine composite assistant |
| CN1358788A (en) * | 2002-01-18 | 2002-07-17 | 北京化工大学 | Method for preparing mother material from nano grade inorganic powder material |
| CN1388156A (en) * | 2002-06-03 | 2003-01-01 | 骆天荣 | Granular nano material as rubber stuffing and its prepn |
| WO2005078015A1 (en) * | 2004-02-16 | 2005-08-25 | Baerlocher Gmbh | Granular stabiliser compositions for polymers containing halogen and their production |
| CN1702104A (en) * | 2004-05-24 | 2005-11-30 | 杨宝柱 | Process for preparing column type polymer compound additives |
| CN102850686A (en) * | 2011-06-30 | 2013-01-02 | 陶氏巴西股份有限公司 | Process to prepare additive packages for use in PVC compounding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022207799A1 (en) * | 2021-03-31 | 2022-10-06 | Sabic Global Technologies B.V. | Polyolefin composition having improved antibacterial and antiviral properties. |
| CN113549258A (en) * | 2021-07-22 | 2021-10-26 | 厦门驰麟科技有限公司 | Preparation method of chemical auxiliary agent and polyethylene polypropylene compound agent |
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