CN113136074A - High-toughness homo-polypropylene composition and preparation method thereof - Google Patents
High-toughness homo-polypropylene composition and preparation method thereof Download PDFInfo
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- CN113136074A CN113136074A CN202110443932.3A CN202110443932A CN113136074A CN 113136074 A CN113136074 A CN 113136074A CN 202110443932 A CN202110443932 A CN 202110443932A CN 113136074 A CN113136074 A CN 113136074A
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- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 229920005629 polypropylene homopolymer Polymers 0.000 title claims description 26
- 238000002360 preparation method Methods 0.000 title description 11
- -1 polypropylene Polymers 0.000 claims abstract description 64
- 239000004743 Polypropylene Substances 0.000 claims abstract description 61
- 229920001155 polypropylene Polymers 0.000 claims abstract description 61
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 37
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 22
- 239000002667 nucleating agent Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 30
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical group CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 12
- 235000013539 calcium stearate Nutrition 0.000 claims description 12
- 239000008116 calcium stearate Substances 0.000 claims description 12
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- USYJXNNLQOTDLW-UHFFFAOYSA-L calcium;heptanedioate Chemical group [Ca+2].[O-]C(=O)CCCCCC([O-])=O USYJXNNLQOTDLW-UHFFFAOYSA-L 0.000 claims description 5
- 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 5
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 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 2
- 229960001545 hydrotalcite Drugs 0.000 claims description 2
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims 1
- 238000009472 formulation Methods 0.000 claims 1
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 claims 1
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 claims 1
- 238000004898 kneading Methods 0.000 claims 1
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- 235000019260 propionic acid Nutrition 0.000 claims 1
- 239000012748 slip agent Substances 0.000 claims 1
- 238000012986 modification Methods 0.000 abstract description 10
- 230000004048 modification Effects 0.000 abstract description 10
- 238000005469 granulation Methods 0.000 abstract description 7
- 230000003179 granulation Effects 0.000 abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 229940075507 glyceryl monostearate Drugs 0.000 description 7
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 description 7
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000002464 physical blending Methods 0.000 description 2
- FGHOOJSIEHYJFQ-UHFFFAOYSA-N (2,4-ditert-butylphenyl) dihydrogen phosphite Chemical compound CC(C)(C)C1=CC=C(OP(O)O)C(C(C)(C)C)=C1 FGHOOJSIEHYJFQ-UHFFFAOYSA-N 0.000 description 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
-
- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- 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
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- 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
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
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- 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
A high-toughness homopolymerized polypropylene composition comprises the following raw materials in percentage by mass: 100 parts of homopolymerized polypropylene powder; 0.05-0.5 part of nucleating agent; 0.12-0.5 part of main and auxiliary antioxidants; 0.05-0.2 part of slipping agent; 0.03-0.7 part of other auxiliary agents; wherein the sum of the nucleating agent, the main and auxiliary antioxidants, the slipping agent and other additives is not more than 1 percent of the mass of the homopolymerized polypropylene powder. According to the homopolymerization polypropylene composition, the compound auxiliary agent consisting of the nucleating system, the antioxidant system and other functional auxiliary agent systems is added, so that the high toughness of the homopolymerization polypropylene composition and the ageing resistance and machining performance of other additives can be realized under the condition that the addition amount of the auxiliary agent acceptable by an upstream raw material industrial production device is only less than 1%, the polypropylene modification can be realized at the extrusion granulation section of a polypropylene production industrial device, the mass production is easy, the production cost of the high-end polypropylene composition is effectively reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of high polymer material polypropylene, in particular to a high-toughness homo-polypropylene composition and a preparation method thereof.
Background
Polypropylene (PP) is one of main plastics, products are diversified, functionalized and high in added value, and the market is continuously widened and extends to various fields of industry, agriculture and daily life products.
The polypropylene production process has been continuously developed over 60 years since the polypropylene slurry process was industrially produced in 1957. With the increasing market demand and the continuous progress of production technology, the high-end and special-purpose degree of polypropylene products is higher and higher. The universal materials have not been able to meet the rapidly growing market demands.
There are generally two ways to improve the toughness of homo-polypropylene during production: firstly, adding copolymerization components such as ethylene, butylene and the like in a polymerization reaction section; the second is the addition of the elastomer by physical blending in the modification plant. The traditional method has the defects of high toughening component content, serious copolymerization comonomer self-polymerization, difficult control of-P-P-, -P-E-, -E-E-molecular chain segment distribution in a reaction product, poor compatibility, uneven components and the like in physical blending.
In addition, the design of the addition amount of the compound auxiliary agent in the extrusion granulation section of the upstream factory is generally below 1%, and the development space of high-end products is greatly restricted due to the limitation of the addition capacity of the compound auxiliary agent in the extrusion granulation section of the upstream factory. Therefore, at present, the development of high-end materials with high addition ratio mostly depends on blending modification of a downstream modification plant, but the secondary extrusion granulation cost of the downstream modification plant is high, so that the development of high-end polypropylene products is also restricted.
Therefore, at present, a compound auxiliary agent with a high trace efficiency is urgently needed, the additive amount which can be accepted by an upstream raw material industrial production device is increased, the performance of raw materials is greatly improved by changing the crystal form of the homopolymerized polypropylene, and other performances of the homopolymerized polypropylene are effectively improved or kept, so that the polypropylene modification can be realized at the extrusion granulation working section of the polypropylene production industrial device, the production cost of high-end polypropylene is effectively reduced, and the production efficiency is improved.
Therefore, the high-toughness homopolymerized polypropylene and the preparation method thereof are provided.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a high-toughness homopolypropylene composition which can be mass-produced in an industrial propylene polymerization plant of an upstream raw material plant, and a method for producing the same.
The high-toughness homopolymerized polypropylene composition disclosed by the invention comprises the following raw materials in percentage by mass:
wherein the sum of the nucleating agent, the main and auxiliary antioxidants, the slipping agent and other additives is not more than 1 percent of the mass of the homopolymerized polypropylene powder.
Wherein the melt index range of the homopolymerized polypropylene is 2-20g/10 min. The polypropylene is preferably a product of homopolymerized polypropylene 1102K (typical value of melt index (MFR) of 3.5g/10min) and 1100N (typical value of melt index of 12g/10min) produced by Ningxia coal industry of national energy group.
Wherein the nucleating agent is a calcium pimelate organic nucleating agent. It is preferably an XK-9 type nucleating agent produced by Guangzhou City Xiangke chemical Co.
Wherein the main and auxiliary antioxidant is a compound of a main antioxidant of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (a main antioxidant 1010) and an auxiliary antioxidant of tri [2, 4-di-tert-butylphenyl ] phosphite ester (an auxiliary antioxidant 168).
Wherein the slipping agent is Glyceryl Monostearate (GMS) with molecular formula of C21H42O4。
Wherein the other auxiliary agent is calcium stearate (molecular formula is C)36H70CaO4) Or SiO2Talcum powder (molecular formula is 3 MgO.4SiO) with content greater than 50%2·H2O) or hydrotalcite (molecular formula is Mg)6Al2(OH)16CO3·4H2O), the particle size of the other auxiliary agents is 300-2500 meshes, and is preferably more than 1000 meshes.
The invention also provides a preparation method of the high-toughness homopolymerized polypropylene composition, which comprises the following steps:
(1) and (3) mixing auxiliary agents: stirring and mixing the nucleating agent, the main antioxidant, the auxiliary antioxidant, the slipping agent and other auxiliaries uniformly according to a proportion;
(2) adding and granulating: and mixing the mixed auxiliary agent and the homopolymerized polypropylene powder according to a formula ratio, and preparing the high-toughness homopolymerized polypropylene granules in a double-screw granulator through conveying, melting, mixing, extruding, water cooling and granulating.
In the step (2), the mixed auxiliary agent and the homopolymerized polypropylene powder are mixed according to a formula proportion and then added into a feeding hopper of a double-screw granulator; or the mixed auxiliary agent and the homopolymerized polypropylene powder are respectively added into a feeding hopper of a double-screw granulator by using a weightless feeding scale.
Wherein, in the step (2), the temperature of the melting, mixing and extruding sections of the double-screw granulator is 190 ℃ and 250 ℃, and the rotating speed and the feeding speed of the main machine are adjusted according to the increase and decrease of the production load.
The invention has the following beneficial technical effects:
(1) according to the invention, the general homo-polypropylene powder is used as carrier resin, the compound auxiliary agent consisting of the nucleating system, the antioxidant system and other functional auxiliary agent systems is added, and the toughness of the homo-polypropylene is greatly improved by changing the crystal form of the homo-polypropylene under the condition that the addition amount of the auxiliary agent acceptable by an upstream raw material industrial production device is only less than 1%, and meanwhile, the antistatic property and the glossiness of the homo-polypropylene are effectively improved, so that the high toughness of the homo-polypropylene composition and other anti-aging and machining properties which need to be possessed are realized.
(2) The preparation method disclosed by the invention is simple and reasonable in formula design and small in additive amount of the auxiliary agent, can realize polypropylene modification in an extrusion granulation section of a polypropylene production industrial device, is easy to realize large-scale mass production of the high-toughness homopolymerized polypropylene on a propylene polymerization industrial device of an upstream raw material factory, effectively reduces the production cost of a high-end polypropylene composition, and improves the production efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The high-toughness homopolymerized polypropylene composition is prepared from the following raw materials in percentage by mass: 100 parts of wiredrawing grade homopolymerized polypropylene 1102K (MFR is 3.5g/10min), 0.06 part of calcium pimelate nucleating agent XK-9, 0.15 part of antioxidant (comprising 0.05 part of main antioxidant 1010 and 0.1 part of auxiliary antioxidant 168), 0.06 part of slipping agent (GMS), 0.08 part of calcium stearate and 0.1 part of talcum powder.
The preparation method comprises the following steps:
(1) and (3) mixing auxiliary agents: adding the nucleating agent, the antioxidant, the slipping agent, the calcium stearate and the talcum powder into a stirrer according to the ratio of 6:15:6:8:10, stirring for 5min at the rotating speed of 800r/min, and uniformly mixing;
(2) and (3) extruding and granulating: uniformly mixing an auxiliary agent system by a weight loss feeding scale according to the mass ratio of auxiliary agents: polypropylene 1102K ═ 0.45: feeding at a ratio of 100, melting, mixing and granulating (the melting temperature is 230 ℃, the screw rotation speed is 200r/min) to obtain the high-toughness homopolymerized polypropylene granules.
Example 2
The high-toughness homopolymerized polypropylene composition is prepared from the following raw materials in percentage by mass: 100 parts of injection molding grade homo-polypropylene 1100N (MFR is 12g/10min) powder, 0.06 part of calcium pimelate nucleating agent XK-9, 0.15 part of antioxidant (comprising 0.05 part of main antioxidant 1010 and 0.1 part of auxiliary antioxidant 168), 0.06 part of slipping agent (GMS), 0.08 part of calcium stearate and 0.1 part of talcum powder.
The preparation method comprises the following steps:
(1) and (3) mixing auxiliary agents: adding the nucleating agent, the antioxidant, the slipping agent, the calcium stearate and the talcum powder into a stirrer according to the ratio of 6:15:6:8:10, stirring for 5min at the rotating speed of 800r/min, and uniformly mixing;
(2) and (3) extruding and granulating: uniformly mixing an auxiliary agent system according to an auxiliary agent: polypropylene 1100N ═ 0.45: feeding at a ratio of 100, melting, mixing and granulating (the melting temperature is 210 ℃, the screw rotation speed is 300r/min) to obtain the high-toughness homopolymerized polypropylene granules.
Example 3
The high-toughness homopolymerized polypropylene composition is prepared from the following raw materials in percentage by mass: 100 parts of wiredrawing grade homopolymerized polypropylene 1102K (MFR is 3.5g/10min) powder, 0.1 part of calcium pimelate nucleating agent XK-9, 0.15 part of antioxidant (comprising 0.05 part of main antioxidant 1010 and 0.1 part of auxiliary antioxidant 168), 0.06 part of slipping agent (GMS) and 0.08 part of calcium stearate.
The preparation method comprises the following steps:
(1) and (3) mixing auxiliary agents: adding the nucleating agent, the antioxidant, the slipping agent and the calcium stearate into a stirrer according to the ratio of 10:15:6:8, stirring for 5min at the rotating speed of 800r/min, and uniformly mixing;
(2) and (3) extruding and granulating: uniformly mixing an auxiliary agent system according to an auxiliary agent: polypropylene 1102K ═ 0.39: feeding at a ratio of 100, melting, mixing and granulating (the melting temperature is 230 ℃, the screw rotation speed is 200r/min) to obtain the high-toughness homopolymerized polypropylene granules.
Comparative example 1-No nucleating agent
The homo-polypropylene composition of comparative example 1 was prepared from the following raw materials in mass fraction: 100 parts of wiredrawing grade homopolymerized polypropylene 1102K (MFR is 3.5g/10min), 0.15 part of antioxidant (comprising 0.05 part of main antioxidant 1010 and 0.1 part of auxiliary antioxidant 168), 0.06 part of slipping agent (GMS) and 0.08 part of calcium stearate.
The preparation method comprises the following steps:
(1) and (3) mixing auxiliary agents: adding the antioxidant, the slipping agent and the calcium stearate into a stirrer according to the ratio of 15:6:8, stirring for 5min at the rotating speed of 800r/min, and uniformly mixing;
(2) and (3) extruding and granulating: uniformly mixing an auxiliary agent system according to an auxiliary agent: polypropylene 1102K ═ 0.29: 100, and melting, mixing and granulating (the melting temperature is 230 ℃, the screw rotation speed is 200r/min) to obtain the comparative homopolymerized polypropylene granules.
Comparative example 2-No nucleating agent
The homo-polypropylene composition of comparative example 2 was prepared from the following raw materials in mass fraction: 100 parts of injection molding grade homo-polypropylene 1100N (MFR is 12g/10min) powder, 0.15 part of antioxidant (comprising 0.05 part of main antioxidant 1010 and 0.1 part of auxiliary antioxidant 168), 0.06 part of slipping agent (GMS) and 0.08 part of calcium stearate.
The preparation method comprises the following steps:
(1) and (3) mixing auxiliary agents: adding the antioxidant, the slipping agent and the calcium stearate into a stirrer according to the ratio of 15:6:8, stirring for 5min at the rotating speed of 800r/min, and uniformly mixing;
(2) and (3) extruding and granulating: uniformly mixing an auxiliary agent system according to an auxiliary agent: polypropylene 1100N ═ 0.29: feeding materials according to the proportion of 100, melting, mixing and granulating (the melting temperature is 210 ℃, the screw rotating speed is 300r/min) to obtain the injection molding grade homopolymerized polypropylene granules.
Comparative example 3 production of finished pellets of Polypropylene 1102K by commercial NOVOLEN Process apparatus
Comparative example 4 production of finished pellets of Polypropylene 1100N by means of a commercial NOVOLEN Process plant
The standard sample bars obtained in the above examples 1-3 and comparative examples 1-4 were injection molded, with the temperature of the injection molding machine in the first zone being 230 ℃, the temperature of the second zone being 225 ℃, the temperature of the third zone being 220 ℃, the temperature of the fourth zone being 215 ℃, the injection pressure in the first zone being 100MPa, the injection pressure in the second zone being 85MPa, and the injection pressure in the third zone being 80 MPa; the temperature of the die is 40 ℃; the injection molding cycle was 30S.
And (3) performing performance test according to a corresponding national standard test method:
testing the notch impact strength of the cantilever beam according to GB/T1843-2008;
the tensile property is tested according to GB/T1040-2018;
gloss performance was tested according to ASTM D2457;
the surface resistivity is tested according to GB/T10410-2006;
the oxidative induction period was tested according to GB/T19466.6-2009.
The results of the performance tests are shown in tables 1 and 2.
TABLE 1 impact tensile Properties of examples and comparative examples
TABLE 2 gloss, surface resistance, ageing resistance of the examples and comparative examples
As can be seen from Table 1, the homo-polypropylene compositions prepared in examples 1 to 3 of the present invention have excellent notched Izod impact strength, tensile elongation at break, and tensile strength at break, as compared with comparative examples 1 to 4; and compared with comparative examples 3-4 of conventional products on the market, examples 1-3 of the present invention have excellent gloss, antistatic properties and anti-aging properties; and the addition amount of the auxiliary agent is only less than 1%, so that the modification of polypropylene can be realized in the extrusion granulation section of a polypropylene production industrial device, the large-scale mass production can be easily realized on a propylene polymerization industrial device, the production cost of high-end polypropylene is effectively reduced, and the production efficiency is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A high-toughness homopolymerized polypropylene composition is composed of the following raw materials in parts by mass:
wherein the sum of the nucleating agent, the main and auxiliary antioxidants, the slipping agent and other additives is not more than 1 percent of the mass of the homopolymerized polypropylene powder.
2. The high tenacity homopolypropylene composition of claim 1, wherein said homopolypropylene has a melt index in the range of 2 to 20g/10 min.
3. The high tenacity homopolypropylene composition of claim 1, wherein said nucleating agent is a calcium pimelate based organic nucleating agent.
4. The high tenacity homopolypropylene composition of claim 1, wherein the primary and secondary antioxidant is a combination of the primary antioxidant tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propanoic acid ] pentaerythritol ester and the secondary antioxidant tris [2, 4-di-tert-butylphenyl ] phosphite.
5. The high tenacity homopolypropylene composition of claim 1, wherein said slip agent is glycerol monostearate.
6. The high tenacity homopolypropylene composition of claim 1, wherein said other auxiliary is calcium stearate, SiO2More than 50% of one or more of talcum powder and hydrotalcite.
7. The high tenacity homopolypropylene composition according to claim 1, wherein the particle size of said other auxiliary is 300-2500 mesh.
8. The process for preparing a high tenacity homopolypropylene composition according to claims 1 to 7, comprising:
(1) and (3) mixing auxiliary agents: stirring and mixing the nucleating agent, the main antioxidant, the auxiliary antioxidant, the slipping agent and other auxiliaries uniformly according to a proportion;
(2) adding and granulating: and mixing the mixed auxiliary agent and the homopolymerized polypropylene powder according to a formula ratio, and preparing the high-toughness homopolymerized polypropylene granules in a double-screw granulator through conveying, melting, mixing, extruding, water cooling and granulating.
9. The process for producing a high tenacity homopolypropylene composition according to claim 8, wherein in the step (2), the blended auxiliary agent and the homopolypropylene powder are blended in a formulation ratio and then fed into a feed hopper of a twin-screw pelletizer; or the mixed auxiliary agent and the homopolymerized polypropylene powder are respectively added into a feeding hopper of a double-screw granulator by using a weightless feeding scale.
10. The process for producing a high tenacity homopolypropylene composition according to claim 8 or 9, wherein in said step (2), the melting, kneading and extrusion section temperature of the twin-screw pelletizer is 190-250 ℃.
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