KR20230111390A - Homo polypropylene improved in transparency, strength and thermostability and method for preparing the same - Google Patents

Abstract

The present invention is based on 100 parts by weight of homo polypropylene, 0.1 to 2 parts by weight of polyolefin rubber; and 0.1 to 0.5 parts by weight of a transparent nucleating agent. As a result, the homo polypropylene composition of the present invention is prepared by adding a specific kind of rubber, a transparent nucleating agent, and a dispersing aid while using existing homo polypropylene production facilities, thereby realizing randomness to improve transparency and gloss, and has effects similar to those of random polypropylene such as transparency, dimensional stability, fluidity, and high level of rigidity.

Description

Homo polypropylene improved in transparency, strength and thermostability and method for preparing the same}

The present invention relates to homo polypropylene and a method for producing the same, and more particularly, to a homo polypropylene having transparency, rigidity, and thermal stability equivalent to that of random polypropylene, and thus applicable to products such as food containers, and a method for producing the same.

Random polypropylene, which has recently been used in various fields, is a product with improved transparency and flexibility from homo polypropylene. Propylene and ethylene are copolymerized and the two monomers are randomly arranged. On the other hand, homo polypropylene is prepared by homopolymerization of propylene, so it has relatively high crystallinity and low transparency. On the other hand, impact polypropylene, a commercial product, has the lowest transparency because it is composed of blocks of homopolypropylene and ethylene-propylene copolymers by copolymerization of propylene and ethylene. Block polypropylene has a problem in that transparency increases to a very insignificant level because randomness cannot be implemented even if a transparent nucleating agent is added.

In the case of random polypropylene, there are limitations in productivity and cost, and in order to produce random polypropylene, a large amount of off-spec products are produced due to production load reduction and grade change. There is a limit to productivity. In addition, since investment in new production facilities is required to produce random polypropylene, there are not only cost limitations, but also limitations in use because it has relatively low stiffness and thermal stability compared to homo polypropylene.

Accordingly, it is necessary to develop homo-polypropylene having excellent productivity while maintaining high transparency, rigidity and thermal stability at the level of random polypropylene.

Korean Patent Registration No. 10-2107912

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a homo polypropylene composition that improves transparency and gloss by realizing randomness by preparing a composition by adding a specific kind of rubber, a transparent nucleating agent, and a dispersing aid while using existing homo polypropylene production equipment, has transparency, dimensional stability, flowability similar to that of random polypropylene, and has a high level of stiffness, a molded article containing the homo polypropylene composition, and a method for producing the homo polypropylene composition.

According to one aspect of the present invention,

Based on 100 parts by weight of homo polypropylene, 0.1 to 2 parts by weight of polyolefin rubber; and 0.1 to 0.5 parts by weight of a transparent nucleating agent.

The homopolypropylene composition may further include 0.01 to 0.2 parts by weight of a dispersing agent based on 100 parts by weight of the homopolypropylene.

The homopolypropylene may have a number average molecular weight (Mn) of 65,000 to 80,000 and a weight average molecular weight (Mw) of 250,000 to 310,000.

The polyolefin-based rubber may be any one selected from EPR (Ethylene Propylene Rubber), EBR (Ethylene Butene Rubber), and EOR (Ethylene Octene Rubber).

The transparent nucleating agent may be a sorbitol-based nucleating agent or a nonitol-based nucleating agent.

The sorbitol-based nucleating agent or nonitol-based nucleating agent is benzylidenesorbitol, bisbenzylidenesorbitol, methylbenzylidenesorbitol, bismethylbenzylidenesorbitol, ethylenebenzylidenesorbitol, bisethylbenzylidenesorbitol, 3,4-dimethylbenzylidenesorbitol, 2-chloro-2,4-methylbenzylidenesorbitol, 1,3-chloro-2,4-methylbenzyl sol It may be any one selected from bitol, 1,3,2,4-bis-3,4-dimethylbenzylidenesorbitol, bis(4-propylbenzylidene)propylsorbitol, and 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl)methylene]-nonitol.

The melt flow index (MI) of the homopolypropylene composition may be 22 to 28 g/10min.

The flexural strength of the homopolypropylene composition may be 50 to 60 MPa.

The flexural modulus of the homopolypropylene composition may be 1800 to 2500 MPa.

The homopolypropylene composition may have a tensile strength at yield of 40 to 45 MPa.

The homopolypropylene composition may have a haze of 25 to 50%.

The homopolypropylene composition may have a heat deflection temperature (HDT) of 120 to 140°C.

The homopolypropylene composition may have a glass transition temperature (T _c ) of 130 to 150°C.

The melting point (T _m ) of the homopolypropylene composition may be 160 to 180°C.

According to another aspect of the present invention,

A resin molded article containing the homo polypropylene composition is provided.

The resin molded article may be any one selected from food containers, films, electronic product parts, and automobile parts.

According to another aspect of the present invention,

injecting a solid complex titanium catalyst, an organoaluminum co-catalyst, an external electron donor, a propylene monomer, and hydrogen gas into a reactor to react them to produce homo-polypropylene; and

A method for producing a homopolypropylene composition comprising the steps of supplying and extruding a transparent nucleating agent through a side feeder is provided.

A dispersing aid may be additionally supplied to the side feeder.

The homo-polypropylene composition of the present invention is prepared by adding a specific type of rubber, a transparent nucleating agent, and a dispersing aid while using existing homo-polypropylene production facilities, thereby realizing randomness and improving transparency and gloss.

The resin molded article containing the homopolypropylene composition of the present invention has high transparency, rigidity, high thermal stability, and high glass transition temperature, so it can be applied to various electronic products including food containers requiring high thermal stability, such as baby bottles and microwave oven containers, and automobile parts.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present invention to specific embodiments, and includes all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprise" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but it should be understood that the presence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

Hereinafter, the homopolypropylene composition of the present invention will be described.

The homopolypropylene composition of the present invention comprises 0.1 to 2 parts by weight of polyolefin rubber based on 100 parts by weight of homopolypropylene; and 0.1 to 0.5 parts by weight of a transparent nucleating agent.

Preferably, the homopolypropylene composition may further include 0.01 to 0.2 parts by weight of a dispersing agent based on 100 parts by weight of the homopolypropylene.

More preferably, the homo polypropylene composition of the present invention contains 0.2 to 1.5 parts by weight of polyolefin rubber based on 100 parts by weight of homo polypropylene; 0.2 to 0.4 parts by weight of a transparent nucleating agent; and 0.02 to 0.15 parts by weight of a dispersing aid.

The homopolypropylene may have a number average molecular weight (Mn) of 65,000 to 80,000 and a weight average molecular weight (Mw) of 250,000 to 310,000.

When the content of the polyolefin-based rubber exceeds 2 parts by weight, haze may increase and manufacturing cost may also increase, and when the content of the polyolefin rubber is less than 0.1 parts by weight, the dispersibility of homo polypropylene is not sufficiently increased, making it difficult to implement randomness and, accordingly, to implement transparency.

The polyolefin-based rubber is preferably any one selected from EPR (Ethylene Propylene Rubber), EBR (Ethylene Butene Rubber), and EOR (Ethylene Octene Rubber), more preferably EOR (Ethylene Octene Rubber), in which case haze can be lowered. That is, transparency can be increased.

The transparent nucleating agent is preferably a sorbitol-based nucleating agent or a nonitol-based nucleating agent.

The sorbitol-based nucleating agent is benzylidenesorbitol, bisbenzylidenesorbitol, methylbenzylidenesorbitol, bismethylbenzylidenesorbitol, ethylenebenzylidenesorbitol, bisethylbenzylidenesorbitol, 3,4-dimethylbenzylidenesorbitol, 2-chloro-2,4-methylbenzylidenesorbitol, 1,3-chloro-2,4-methylbenzylsorbitol, 1,3 ,2,4-bis-3,4-dimethylbenzylidenesorbitol, bis(4-propylbenzylidene)propylsorbitol, and the like.

The nonitol-based nucleating agent may be 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl)methylene]-nonitol.

The transparent nucleating agent can increase the crystallization rate of the polymer and change the crystallization temperature characteristics, and by increasing the microcrystal content, the transparency and gloss of the product can be improved and the crystallinity can be increased to increase the rigidity compared to general homo-polypropylene to improve durability.

If the amount of the transparent nucleating agent is less than 0.1 parts by weight based on 100 parts by weight of homo polypropylene, the nucleating effect is not sufficient, and the number of crystals formed is small and the size becomes large, resulting in a decrease in transparency.

When a dispersing aid is additionally used in the above content together with the use of the transparent nucleating agent, it may be more effective to increase transparency and rigidity.

The melt flow index (MI) of the homopolypropylene composition is preferably 22 to 28 g/10min.

The flexural strength of the homopolypropylene composition is preferably 50 to 60 MPa, more preferably 52 to 55 MPa.

The flexural modulus of the homopolypropylene composition is preferably 1800 to 2500 MPa, more preferably 2000 to 2400 MPa.

Preferably, the homopolypropylene composition has a tensile strength at yield of 40 to 45 MPa.

The haze of the homopolypropylene composition is preferably 25 to 50%, more preferably 25 to 35%.

The homopolypropylene composition may have a heat deflection temperature (HDT) of 120 to 140°C, more preferably 125 to 135°C.

The homopolypropylene composition may have a glass transition temperature (T _c ) of 130 to 150 °C and a melting point (T _m ) of 160 to 180 °C.

The present invention provides a resin molded article containing the homo polypropylene composition.

In addition, the present invention provides a method for preparing the homopolypropylene composition.

The method for producing a homo-polypropylene composition according to the present invention comprises preparing a homo-polypropylene by injecting a solid complex titanium catalyst, an organoaluminum co-catalyst, an external electron donor, a propylene monomer, and hydrogen gas into a reactor and reacting the mixture; and supplying the homopolypropylene to a main feeder of an extruder and supplying 0.2 to 2 parts by weight of polyolefin-based rubber and 0.2 to 0.5 parts by weight of a transparent nucleating agent based on 100 parts by weight of the homo-polypropylene through a side feeder, and then extruding the same.

Preferably, 0.01 to 0.2 parts by weight of a dispersing aid based on 100 parts by weight of the homo polypropylene may be additionally supplied to the side feeder.

In this way, by adding a transparent nucleating agent and a dispersing aid, the degree of crystallinity can be increased to have high rigidity compared to general homo polypropylene, and the randomness of the polymer can be realized by adding rubber to achieve a level equivalent to that of random polypropylene. Transparency can be implemented.

The external electron donor may be a silane-based electron donor, and preferably, the silane-based electron donor is selected from the group consisting of cyclohexylmethyldimethoxysilane, propylmethyldimethoxysilane, isobutyltrimethoxysilane, diisobutyldimethoxysilane, diisopropyldimethoxysilane, di-t-butyldimethoxysilane, t-butyltrimethoxysilane, cyclohexylmethyldimethoxysilane, and dicyclophene. Tyldimethoxysilane, dicyclohexyldimethoxysilane, 2-norbornanetriethoxysilane, 2-norbornanemethyldimethoxysilane, diphenyldimethoxysilane, phenyltrimethoxysilane, phenylethyldimethoxysilane, and phenylmethyldimethoxysilane It may be at least one selected from silane.

The reaction time for polymerizing homopolypropylene in the reactor is preferably adjusted to 50 to 200 minutes, more preferably 60 to 190 minutes, and still more preferably 70 to 180 minutes. When the reaction time is less than 50 minutes, the polymerization reaction may be insufficient, and when the reaction time exceeds 200 minutes, polymerization activity may be lowered and process efficiency may be lowered.

The solid complex titanium catalyst is preferably used in which TiCl ₃ or TiCl ₄ is supported on a MgCl ₂ support, and more preferably, one in which TiCl ₃ is supported on a MgCl ₂ support may be used.

The organoaluminum co-catalyst is trimethylaluminum, triethylaluminium, triisobutylaluminium, tri-n-propylaluminium, triisopropylaluminium, tri-n-butylaluminium, tri-t-butylaluminium, tri-n-pentylaluminium, trineopentylaluminium, tri-n-hexylaluminium, tri-n-octylaluminium, tris(2-ethylhexyl) syl) aluminum, tricyclohexyl aluminum, tris(1-methylcyclopentyl) aluminum, triphenyl aluminum, tri-p-tolyl aluminum, tris(2,6-dimethylphenyl) aluminum, tribenzyl aluminum, diethylphenyl aluminum, diethyl-p-tolyl aluminum, diethylbenzyl aluminum, ethyldiphenyl aluminum, ethyl di-p-tolyl aluminum , ethyl dibenzyl aluminum, dimethyl aluminum hydride, diethyl aluminum hydride, din-propyl aluminum hydride, diisopropyl aluminum hydride, din-butyl aluminum hydride, diisobutyl aluminum hydride (DIBAH), dit-butyl aluminum hydride, dipentyl aluminum hydride, dihexyl aluminum hydride, dicyclohexyl aluminum hydride, dioctyl aluminum hydride etc., and preferably triethyl aluminum can be used.

The temperature in the reactor is preferably maintained at 75 to 85°C, more preferably at 77 to 83°C, and even more preferably at 78 to 82°C. In the above temperature range, catalytic activity is excellent and polymerization can be performed most smoothly.

The pressure in the reactor may be preferably maintained at 3 to 4 MPa, more preferably 3.2 to 3.8 MPa, and even more preferably 3.4 to 3.6 MPa. Polymerization may be performed most smoothly within the above pressure range.

In addition, it is preferable to adjust the melt flow index (MI) of homopolypropylene to 22 to 28 g/10min by adjusting the amount of hydrogen gas injected.

In particular, although not explicitly described in the following examples, in the method for producing homopolypropylene of the present invention, the homopolypropylene composition produced while varying the type and content of polyolefin rubber, the type and content of transparent nucleating agent, and the type and content of dispersing aid was confirmed. Physical properties such as transparency, stiffness, haze, and glass transition temperature were confirmed. As a result, unlike other conditions and different numerical ranges, the properties of flexural strength, flexural modulus, tensile strength at yield, haze, and heat deflection temperature of the prepared homopolypropylene composition were excellently measured when all of the following conditions were satisfied. Such manufacturing conditions are as follows.

Polyolefin-based rubber uses 0.2 to 1.5 parts by weight of EOR (Ethylene Octene Rubber) based on 100 parts by weight of homo polypropylene, 0.2 to 0.4 parts by weight of NX8000K as a transparent nucleating agent, and 0.02 to 0.15 parts by weight of GMS (Glycerol monostearate) as a dispersing aid.

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and various changes and modifications are possible within the scope and spirit of the present invention.

[Example]

Example 1: Preparation of homo polypropylene composition

Into the polymerization reactor, solid complex titanium catalyst with TiCl ₃ supported on MgCl ₂ carrier, triethylaluminum as organoaluminum cocatalyst, cyclohexylmethyldimethoxysilane as external electron donor, propylene monomer, and hydrogen gas were sequentially injected, and bulk polymerization was performed at 80° C. under 3.5 MPa for 75 minutes to obtain a weight average molecular weight (Mw) of 250,000 to 310,000 was prepared, and the melt flow index (MI) of the polypropylene was adjusted to about 25 g/10 min by adjusting the amount of hydrogen gas. Subsequently, EPR (Ethylene Propylene Rubber) and transparent nucleating agent NX8000K were mixed with homopolypropylene through a side feeder during extrusion in an extruder, and 1% by weight of EPR and 0.3% by weight of transparent nucleating agent NX8000K were added to prepare a homopolypropylene composition.

Example 2: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 1, except that EBR (Ethylene Butene Rubber) was used as a rubber component instead of EPR (Ethylene Propylene Rubber).

Example 3: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 1, except that EOR (Ethylene Octene Rubber) was used instead of EPR (Ethylene Propylene Rubber) as a rubber component.

Example 4: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 3, except that 0.25% by weight of EOR (Ethylene Octene Rubber) was used instead of 1% by weight as a rubber component.

Example 5: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 3, except that 0.05% by weight of GMS (glycerol monostearate), a dispersing aid, was additionally mixed and melt-kneaded based on the mixture with polypropylene, EOR (Ethylene Octene Rubber), and a transparent nucleating agent.

Example 6: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 3, except that 0.1% by weight of GMS (glycerol monostearate), a dispersing aid, was additionally mixed with the mixture of polypropylene, EOR (Ethylene Octene Rubber), and NX8000K, and then melt-kneaded.

Comparative Example 1: Preparation of homo polypropylene composition

A homopolypropylene composition was prepared under the same conditions as in Example 1, except that EPR (Ethylene Propylene Rubber) was not used.

Comparative Example 2: Random polypropylene copolymer

A random polypropylene copolymer product from company A was compared with the examples.

Comparative Example 3: Random Polypropylene Copolymer

Random polypropylene copolymer products from company B were compared with the examples.

Comparative Example 4: Random Polypropylene Copolymer

A random polypropylene copolymer product from another company C was compared with the examples.

Table 1 below summarizes the components and contents added to the homopolypropylene of Examples 1 to 6 and Comparative Example 1, excluding random polypropylene copolymer products from other companies.

additive Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Ethylene Octene Rubber - - - One% 0.25% 0.25% 0.25% Ethylene Butene Rubber - - One% - - - - Ethylene Propylene Rubber - One% - - - - - Dispersing aid (GMS) - - - - - 0.05% 0.1% Transparent Nucleating Agent (NX8000K) 0.3% 0.3% 0.3% 0.3% 0.3% 0.3% 0.3%

[Experimental Example]

Experimental Example 1: Evaluation of physical properties

For the homopolypropylene compositions prepared in Examples 1 to 6 and Comparative Example 1, the following physical properties were measured, and the results are summarized in Table 2 below.

(1) Melt Index: measured according to ASTM D1238.

(2) Flexural strength: measured according to ASTM D790.

(3) Flexural modulus: measured according to ASTM D790.

(4) Tensile Strength at Yield: Measured according to ASTM D 638.

(5) Tensile Elongation at Break: measured by the method of ASTM D 638.

(6) IZOD Impact Strength: Measured according to ASTM D256

(7) Haze: measured according to ASTM D-1003.

(8) Heat deflection temperature (HDT): measured according to ASTM D648.

physical properties Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Melt Index (g/10min) 24 24 24 24 24 24 24 Flexural strength (MPa) 54 54.8 54.5 55 53 53 53 Flexural modulus (MPa) 2,100 2,030 2020 2,050 2,300 2,300 2,300 Yield tensile strength (MPa) 42 41.5 41.6 41.9 42 42 42 Elongation at break (%) 10 15 12 11 10 10 10 IZOD impact strength (23 Deg., J/m) 20 20 20 20 20 20 20 Haze (%) 60 60 66 50 35 32 30 Heat deflection temperature (℃) 131 128.7 125.9 129.2 128.3 128 128

Examining the physical properties of the homopolypropylene compositions of Examples 1 to 4 in order to compare the physical properties according to the type of rubber, Example 3 using EOR (Ethylene Octene Rubber) showed an excellent haze value compared to Example 1 using EPR (Ethylene Propylene Rubber) or Example 2 using EBR (Ethylene Butene Rubber) under the same conditions except for the type of rubber. Comparing the physical properties of the homopolypropylene composition of Example 3 and Example 4, it was found that the homopolypropylene composition of Example 4 using an EOR of 0.25% exhibited a remarkably excellent haze value.

In addition, looking at the physical properties of Example 5 and Example 6 using a dispersing aid, it was found to have an excellent haze value compared to Example 4 without using a dispersing aid, and Example 6 containing 0.1% of a dispersing aid showed a better haze value than Example 5 containing 0.05%, resulting in high transparency.

Experimental Example 2: Comparison of physical properties with random polypropylene copolymer

Various physical properties of the homopolypropylene composition prepared according to Example 4 of the present invention and the commercial random polypropylene copolymers of Comparative Examples 2 to 4 were compared, and the results are shown in FIG. 3 . The physical property test method is the same as described in Experimental Example 1.

physical properties Example 4 Comparative Example 2 Comparative Example 3 Comparative Example 4 Melt index (g/10min) 24 14 28 24 Flexural strength (MPa) 53 33.8 31.8 28 Flexural modulus (MPa) 2,300 1,320 1,190 1,100 Yield tensile strength (MPa) 42 33.5 30.3 30.3 Elongation at break (%) 10 200 480 500 IZOD impact strength (23 Deg., J/m) 20 20 20 20 Haze (%) 35 28 33 26 Heat deflection temperature (℃) 128.3 105 88 84 Tm (℃) 166.6 153.2 145.3 149 Tc (℃) 132.7 123.9 116.5 121

According to this, the homopolypropylene composition of Example 4 of the present invention has excellent transparency with a haze value similar to that of commercially available random polypropylene copolymers, and also exhibits superior physical properties such as flexural strength, flexural modulus, and heat deflection temperature. In addition, the melting point (T _m ) and glass transition temperature (T _c ) of the homopolypropylene composition of Example 4 of the present invention were also higher than those of commercially available random polypropylene copolymers.

Although the embodiments of the present invention have been described above, those skilled in the art may add, change, delete, or add components within the range that does not deviate from the spirit of the present invention described in the claims. It will be possible to modify and change the present invention in various ways, and this is also included within the scope of the present invention.

Claims (18)

Based on 100 parts by weight of homo polypropylene, 0.1 to 2 parts by weight of polyolefin rubber; and 0.1 to 0.5 parts by weight of a transparent nucleating agent. According to claim 1,
The homo polypropylene composition further comprises 0.01 to 0.2 parts by weight of a dispersing agent based on 100 parts by weight of the homo polypropylene. According to claim 1,
The homo polypropylene composition, characterized in that the number average molecular weight (Mn) of the homo polypropylene is 65,000 to 80,000, and the weight average molecular weight (Mw) is 250,000 to 310,000. According to claim 1,
The polyolefin-based rubber is a homopolypropylene composition, characterized in that any one selected from EPR (Ethylene Propylene Rubber), EBR (Ethylene Butene Rubber), and EOR (Ethylene Octene Rubber). According to claim 1,
The transparent nucleating agent is a homopolypropylene composition, characterized in that the sorbitol-based nucleating agent or nonitol-based nucleating agent. According to claim 5,
The sorbitol-based nucleating agent or nonitol-based nucleating agent is benzylidenesorbitol, bisbenzylidenesorbitol, methylbenzylidenesorbitol, bismethylbenzylidenesorbitol, ethylenebenzylidenesorbitol, bisethylbenzylidenesorbitol, 3,4-dimethylbenzylidenesorbitol, 2-chloro-2,4-methylbenzylidenesorbitol, 1,3-chloro-2,4-methylbenzyl sol A homopolypropylene composition characterized in that it is any one selected from bitol, 1,3,2,4-bis-3,4-dimethylbenzylidenesorbitol, bis(4-propylbenzylidene)propylsorbitol, and 1,2,3-trideoxy-4,6:5,7-bis-O-[(4-propylphenyl)methylene]-nonitol. According to claim 1,
The homopolypropylene composition, characterized in that the melt flow index (MI) of the homopolypropylene composition is 22 to 28 g / 10min. According to claim 1,
The homopolypropylene composition, characterized in that the flexural strength of the homopolypropylene composition is 50 to 60 MPa. According to claim 1,
The homopolypropylene composition, characterized in that the flexural modulus of the homopolypropylene composition is 1800 to 2500 MPa. According to claim 1,
The homopolypropylene composition, characterized in that the yield tensile strength of the homopolypropylene composition is 40 to 45 MPa. According to claim 1,
Homo polypropylene composition, characterized in that the haze (haze) of the homo polypropylene composition is 25 to 50%. According to claim 1,
The homopolypropylene composition, characterized in that the heat deflection temperature (HDT) of the homopolypropylene composition is 120 to 140 ℃. According to claim 1,
The homopolypropylene composition, characterized in that the glass transition temperature (T _c ) of the homopolypropylene composition is 130 to 150 ℃. According to claim 1,
The homopolypropylene composition, characterized in that the melting point (T _m ) of the homopolypropylene composition is 160 to 180 ℃. A resin molded article comprising the homo polypropylene composition of any one of claims 1 to 14. According to claim 15,
The resin molded article comprising a homopolypropylene composition, characterized in that the resin molded article is any one selected from food containers, films, electronic product parts and automobile parts. injecting a solid complex titanium catalyst, an organoaluminum co-catalyst, an external electron donor, a propylene monomer, and hydrogen gas into a reactor to react them to produce homo-polypropylene; and
A method for producing a homopolypropylene composition comprising: extruding while supplying a transparent nucleating agent to a side feeder. According to claim 17,
A method for producing a homopolypropylene composition, characterized in that the dispersing aid is additionally supplied to the side feeder.