CN104558813A - Biaxially oriented polypropylene (BOPP) capacitor membrane special-purpose polypropylene composition synthesis method - Google Patents

Biaxially oriented polypropylene (BOPP) capacitor membrane special-purpose polypropylene composition synthesis method Download PDF

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Publication number
CN104558813A
CN104558813A CN201310473088.4A CN201310473088A CN104558813A CN 104558813 A CN104558813 A CN 104558813A CN 201310473088 A CN201310473088 A CN 201310473088A CN 104558813 A CN104558813 A CN 104558813A
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bopp
polypropylene
synthetic method
additive
propylene
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CN104558813B (en
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刘勇
王荣和
陈国康
赵兰洁
黄飞
虞光财
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China Petroleum and Chemical Corp
Sinopec Shanghai Petrochemical Co Ltd
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China Petroleum and Chemical Corp
Sinopec Shanghai Petrochemical Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F110/04—Monomers containing three or four carbon atoms
    • C08F110/06—Propene
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

The invention discloses a biaxially oriented polypropylene (BOPP) capacitor membrane special-purpose polypropylene composition synthesis method. The synthesis method comprises that a polypropylene base material is produced by liquid phase method polymerization under the conditions of activated magnesium chloride as a carrier, Ziegler-Natta as a main catalyst, and a cocatalyst, the polypropylene base material and an additive are mixed to obtain a uniform mixture, and the mixture is subjected to melt-blending granulation to form ultrapure polypropylene resin products for manufacture of a BOPP capacitor film. The polypropylene composition can satisfy technical requirements on BOPP capacitor film processing and guarantees excellent mechanical properties, high uniformity, high cleanability and good electrical performances of the manufactured BOPP capacitor film.

Description

A kind of synthetic method being exclusively used in the polypropene composition of BOPP capacitor films
Technical field
The present invention relates to a kind of synthetic method being exclusively used in the polypropene composition of BOPP capacitor films, belong to synthetic resins technical field.
Background technology
Along with the development of China's polypropylene (PP) industry, polypropylene range of application is expanded further, and the low ash content acrylic resin of high purity shows good application prospect in industries such as medicine, electronic apparatus, weavings.Particularly electrician is with BOPP film, lithium cell polypropylene diaphragm, is proposed harsh requirement to the ash content, metal ion content etc. of pp material.
Biaxially oriented polypropylene film (BOPP) (BOPP) film has the features such as light weight, transparent, nontoxic, moistureproof and physical strength be high, be widely used in the packaging of the products such as food, medicine, daily light industry, cigarette, capacitor dielectric material is also one of important use of BOPP film in addition.Since reform and opening-up, electrical condenser production is turned to inland of China by Japan, Korea S and Taiwan, world's electronic information complete machine production is set up factories in inland of China, transnational company purchases in inland of China, electrical condenser needed for the complete machine production of domestic market increases by a fairly big margin, and China more and more becomes the staple market of global electrical condenser consumption.In addition, the Application Areas of electrical condenser is also in continuous expansion, and Power capacitor industry is interior over the next several years exists larger development space.
In the evolution of PP production technology, catalyzer serves core pushing effect.Catalyzer domestic at present and processing condition still can not meet direct polymerization and obtain the polyacrylic particular requirement of low ash content, often will by adopting energy consumption high and the washing step of costliness.At present, PP catalyzer is just towards super-active, high directionality and the relative molecular mass distribution future development that effectively can control polymkeric substance, thus, develop the effective catalyst that active high consumption is few, and explore rational processing condition, under the condition not using washing aftertreatment technology, the ash content reduced as far as possible in polypropylene product is one of following development trend.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of synthetic method being exclusively used in the polypropene composition of BOPP capacitor films, the polypropylene resin composite ash content obtained is low.
In the present invention, first Ziegler-Natta catalyst is used, with the magnesium chloride of activation for carrier, under the effect of Primary Catalysts and promotor, employing liquid phase method is polymerized, under the condition added less or do not add external electron donor, propylene carries out polyreaction and generates acrylic resin base-material in two sections of annular-pipe reactors.Then, polypropylene base-material neutralization additive is mixed, then melting mixing granulation, obtain ultrapure acrylic resin product, it can be used for manufacturing BOPP capacitor film.Concrete technical scheme is described below.
The polypropene composition of BOPP capacitor films that what the present invention obtained be exclusively used in is the SPHERIPOL bis-foundry technology according to Italian BASELL company, adopts the preparation of dicyclo pipe tandem reactor and obtains.Its preparation method mainly comprises the following steps:
(1) pp material enters first ring pipe reactor, polymerization reaction take place under external electron donor, Primary Catalysts and promotor effect, wherein said pp material is made up of propylene and hydrogen, described Primary Catalysts is undertaken formulated by HA-DQ and grease, and wherein quality-the volumetric concentration of HA-DQ is 40 ~ 100g/l; Described promotor is triethyl aluminum, and the mass ratio of triethyl aluminum and propylene is the mass ratio of 0.03 ~ 0.15Kg/t, HA-DQ and propylene is 8 ~ 20g/t; Described external electron donor is Cyclohexyl Methyl Dimethoxysilane, the mass ratio≤3:1 of described 0≤cyclohexyl methyl dimethoxy and triethyl aluminum;
(2) first ring pipe reactor outlet material is entered the second annular-pipe reactor and carry out polyreaction, obtain polypropylene base-material;
(3) add additive in the polypropylene base-material obtained to step (2), after Homogeneous phase mixing, carry out melting mixing granulation with forcing machine, then homogenizing obtain for BOPP capacitor films produce resin dedicated, melting Heating temperature is 200 ~ 260 DEG C.
In the HA-DQ adopted in above-mentioned steps (1), the mass content of titanium is 2.5 ~ 3.0%, and the mass content of internal electron donor is 10 ~ 25%, and the mass content of magnesium chloride is 72 ~ 87.5%.Described grease is Vaseline.
When carrying out polyreaction in above-mentioned steps (1) and step (2), temperature of reaction is 65 ~ 75 DEG C, and reaction pressure is 3.3 ~ 4.4MPa, and endless tube density is 520 ~ 570Kg/m3, powder melt flow rate (MFR) is 3.2 ~ 4.4g/min, and density of hydrogen is 300 ~ 900ppm.
In above-mentioned steps (1), endless tube density is preferably 540 ~ 570Kg/m3; The mass ratio of triethyl aluminum and propylene is preferably 0.03 ~ 0.08Kg/t.
In above-mentioned steps (3), described additive comprises primary antioxidant and auxiliary anti-oxidant, acid neutralizing agent, wherein:
Described primary antioxidant is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester;
Described auxiliary anti-oxidant is without phosphorus azanol kind antioxidant [N.N diethyl phenyl] azanol;
Described Efficient Acid neutralizing agent is synthetic hydrotalcite DHT-4A; The component proportion of described additive is with parts by weight, and when primary antioxidant is 100 parts, auxiliary anti-oxidant 50 ~ 100 parts, Efficient Acid neutralizing agent is 15 parts.
The weight ratio of above-mentioned acrylic resin base-material and additive is (500 ~ 2000): 1.
Contriver finds through large quantity research, adopt high activated catalyst HA-DQ catalyzer, reduce the add-on of promotor triethyl aluminum in traditional technology, under the condition added less or do not add external electron donor, improve annular-pipe reactor density, significantly can reduce the ash of resin.
The invention has the advantages that: the melt index of the polypropylene resin composite of the present invention's synthesis is between 2.0 ~ 4.0g/10min; Have high isotactic, degree of isotacticity is 95.0 ~ 98.0%; Ash content is low, and ash, lower than 40ppm, can be exclusively used in the production of BOPP capacitor films; When being exclusively used in the production of BOPP capacitor films, effectively can improve the mechanical property of PP Pipe Compound, high uniformity, abrasive and electric property.
Below will the invention will be further described by specific embodiment, wherein in invention, ash is defined as follows:
Ash: combustion of organic matter and at high temperature calcination processing residue until constant weight.Ash is in massfraction, and numerical value represents with %, and calculation formula is as follows:
Ash content (%)=m 1, m 0* 100
In formula: m 0---dry sample mass, unit is gram (g); m 1---gained ash weight, unit is gram (g).Accompanying drawing explanation
Fig. 1 is the present invention for the synthesis of the resin dedicated device schematic diagram of BOPP capacitor films.
Number in the figure: D201 pre-contact tank, R200 pre-polymerization reactor, R201 first ring pipe reactor, R202 second annular-pipe reactor, D301 high-pressure degas tank, F301 deep bed filter, D501 steamer, D502 moisture eliminator, EX801 extrusion machine.
Embodiment
In the present invention, HA-DQ commercially, is produced by Beijing Chemical Research Institute, and in HA-DQ, the mass content of titanium is 2.5 ~ 3.0%, and the mass content of internal electron donor is 10 ~ 25%, and the mass content of magnesium chloride is 72 ~ 87.5%;
Primary Catalysts is undertaken formulated by HA-DQ and Vaseline, and the quality-volumetric concentration of HA-DQ is 40 ~ 100g/l
The present invention adopts Fig. 1 shown device synthesis BOPP capacitor films resin dedicated.
[embodiment 1 ~ 8]
There is provided a kind of in the present invention and synthesize the resin dedicated method of BOPP capacitor films, mainly comprise the following steps:
1) pp material (is mainly propylene, containing appropriate amount of hydrogen) enter first ring pipe reactor, polymerization reaction take place under external electron donor, Primary Catalysts and promotor effect, temperature of reaction is 65 ~ 75 DEG C, reaction pressure is .3 ~ 4.4MPa, endless tube density is 520 ~ 570Kg/m3, and powder melt flow rate (MFR) is 3.2-4.4g/min, and density of hydrogen is 300 ~ 900ppm;
2) first ring pipe reactor outlet material enters the second annular-pipe reactor and carries out polyreaction, obtain polypropylene base-material, temperature of reaction is 65 ~ 75 DEG C, reaction pressure is 3.3 ~ 4.4MPa, endless tube density is 520 ~ 570Kg/m3, powder melt flow rate (MFR) is 3.2 ~ 4.4g/min, and density of hydrogen is 300 ~ 900ppm;
3) in step 2) the polypropylene base-material that obtains, add additive, additive comprises primary oxidant (four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester), secondary oxidizer ([N.N diethyl phenyl] azanol) and efficient acid scavenger (DHT-4A), when primary antioxidant is 100 parts, auxiliary anti-oxidant 50 ~ 100 parts, efficient acid-acceptor is 15 parts
The mass ratio of described polypropylene base-material and additive is (500 ~ 2000): 1, carries out melting mixing granulation after Homogeneous phase mixing through forcing machine, and then to obtain low ash polypropylene fibre resin dedicated for homogenizing, and melting Heating temperature is 200 ~ 260 DEG C.
Each embodiment material proportion is in table 1, and reaction process condition is in table 2, table 3, table 4, and the performance test results of the acrylic resin product obtained is in table 5.Melting index is tested: instrument melting means index tester, adopts the test of GB/T3682 method.
[comparative example 1 ~ 2]
Adopt traditional synthesis technique synthesis acrylic resin, add electron donor and do not control promotor consumption processing condition under synthesize acrylic resin.What comparative example 1 and comparative example 2 adopted is commercially available DQ series catalysts.
Table 1
Table 2
Table 3
Table 4
Table 5

Claims (7)

1. be exclusively used in a synthetic method for the polypropene composition of BOPP capacitor films, it is characterized in that, mainly comprise the following steps:
(1) pp material enters first ring pipe reactor, polymerization reaction take place under external electron donor, Primary Catalysts and promotor effect, wherein said pp material is made up of propylene and hydrogen, described Primary Catalysts is undertaken formulated by HA-DQ and grease, and wherein quality-the volumetric concentration of HA-DQ is 40 ~ 100g/l; Described promotor is triethyl aluminum, and the mass ratio of triethyl aluminum and propylene is the mass ratio of 0.03 ~ 0.15Kg/t, HA-DQ and propylene is 8 ~ 20g/t; Described external electron donor is Cyclohexyl Methyl Dimethoxysilane, the mass ratio≤3:1 of described 0≤cyclohexyl methyl dimethoxy and triethyl aluminum;
(2) first ring pipe reactor outlet material is entered the second annular-pipe reactor and carry out polyreaction, obtain polypropylene base-material;
(3) add additive in the polypropylene base-material obtained to step (2), after Homogeneous phase mixing, carry out melting mixing granulation with forcing machine, then homogenizing obtain for BOPP capacitor films produce resin dedicated, melting Heating temperature is 200 ~ 260 DEG C.
2. synthetic method according to claim 1, is characterized in that: in HA-DQ described in step (1), and the mass content of titanium is 2.5 ~ 3.0%, and the mass content of internal electron donor is 10 ~ 25%, and the mass content of magnesium chloride is 72 ~ 87.5%; Described grease is Vaseline.
3. synthetic method according to claim 1, it is characterized in that: when carrying out polyreaction in step (1) and step (2), temperature of reaction is 65 ~ 75 DEG C, reaction pressure is 3.3 ~ 4.4MPa, endless tube density is 520 ~ 570Kg/m3, powder melt flow rate (MFR) is 3.2 ~ 4.4g/min, and density of hydrogen is 300 ~ 900ppm.
4. the synthetic method according to claim 1 or 3, is characterized in that: in step (1) and step (2), described endless tube density is 540 ~ 570Kg/m3.
5. synthetic method according to claim 1, is characterized in that: described in step (1), the mass ratio of triethyl aluminum and propylene is 0.03 ~ 0.08Kg/t.
6. synthetic method according to claim 1, is characterized in that: additive described in step 3) comprises primary antioxidant, auxiliary anti-oxidant and Efficient Acid neutralizing agent, wherein:
Described primary antioxidant is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester;
Described auxiliary anti-oxidant is without phosphorus azanol kind antioxidant [N.N diethyl phenyl] azanol;
Described Efficient Acid neutralizing agent is synthetic hydrotalcite DHT-4A;
The component proportion of described additive is with parts by weight, and when primary antioxidant is 100 parts, auxiliary anti-oxidant is 50 ~ 100 parts, and Efficient Acid neutralizing agent is 15 parts.
7. synthetic method according to claim 1, is characterized in that: the weight ratio of described polypropylene base-material and additive is (500 ~ 2000): 1.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109306030A (en) * 2017-07-28 2019-02-05 中国石油天然气股份有限公司 Lithium battery diaphragm PP Pipe Compound and preparation method thereof
CN109575171A (en) * 2018-10-09 2019-04-05 中国石油化工股份有限公司 A kind of preparation method of polypropylene casting film resin
CN111100371A (en) * 2018-10-25 2020-05-05 中国石油化工股份有限公司 Homo-polypropylene material for power cable and preparation method thereof
CN111100382A (en) * 2018-10-25 2020-05-05 中国石油化工股份有限公司 Polypropylene-butadiene copolymer material for power cable and preparation method thereof
CN112876591A (en) * 2021-02-26 2021-06-01 陕西延长中煤榆林能源化工有限公司 Industrial production method of polypropylene resin for battery diaphragm
CN115160463A (en) * 2022-06-24 2022-10-11 中国石化中原石油化工有限责任公司 Production method of high-purity low-precipitate polypropylene

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0415229A (en) * 1990-05-08 1992-01-20 Mitsubishi Petrochem Co Ltd Biaxially oriented polypropylene film
CN1718598A (en) * 2005-07-22 2006-01-11 白跃华 Preparation method of homopolymerization polypropylene bidirection drawing film special material
CN1810871A (en) * 2005-01-28 2006-08-02 中国石油化工股份有限公司 Polypropylene composition and the biaxial stretching film prepared thereof
CN101389705A (en) * 2006-02-22 2009-03-18 Ls电线有限公司 Propylene resin composition with flame retardance and abrasion resistance
US20130295395A1 (en) * 2012-04-27 2013-11-07 Claudio M. Paulino Biaxially oriented polypropylene film with improved moisture barrier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0415229A (en) * 1990-05-08 1992-01-20 Mitsubishi Petrochem Co Ltd Biaxially oriented polypropylene film
CN1810871A (en) * 2005-01-28 2006-08-02 中国石油化工股份有限公司 Polypropylene composition and the biaxial stretching film prepared thereof
CN1718598A (en) * 2005-07-22 2006-01-11 白跃华 Preparation method of homopolymerization polypropylene bidirection drawing film special material
CN101389705A (en) * 2006-02-22 2009-03-18 Ls电线有限公司 Propylene resin composition with flame retardance and abrasion resistance
US20130295395A1 (en) * 2012-04-27 2013-11-07 Claudio M. Paulino Biaxially oriented polypropylene film with improved moisture barrier

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
李正光等: "《聚丙烯生产技术与应用》", 30 April 2006 *
梁晓云等: "我的兴趣只在科研上", 《中国石化报》 *
逢锦屹等: "聚丙烯拉丝树脂的生产与应用", 《合成树脂及塑料》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109306030A (en) * 2017-07-28 2019-02-05 中国石油天然气股份有限公司 Lithium battery diaphragm PP Pipe Compound and preparation method thereof
CN109575171A (en) * 2018-10-09 2019-04-05 中国石油化工股份有限公司 A kind of preparation method of polypropylene casting film resin
CN109575171B (en) * 2018-10-09 2022-09-09 中国石油化工股份有限公司 Preparation method of polypropylene cast film resin
CN111100371A (en) * 2018-10-25 2020-05-05 中国石油化工股份有限公司 Homo-polypropylene material for power cable and preparation method thereof
CN111100382A (en) * 2018-10-25 2020-05-05 中国石油化工股份有限公司 Polypropylene-butadiene copolymer material for power cable and preparation method thereof
CN112876591A (en) * 2021-02-26 2021-06-01 陕西延长中煤榆林能源化工有限公司 Industrial production method of polypropylene resin for battery diaphragm
CN115160463A (en) * 2022-06-24 2022-10-11 中国石化中原石油化工有限责任公司 Production method of high-purity low-precipitate polypropylene
CN115160463B (en) * 2022-06-24 2023-07-28 中国石化中原石油化工有限责任公司 Method for producing polypropylene with high purity and low precipitate

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