JPH08208944A - Multilayer laminate - Google Patents

Abstract

PURPOSE: To obtain a multilayer laminate excellent in surface softness, peeling strength, and embossability. CONSTITUTION: The multilayer laminate comprises at least two layers, i.e., a layer (I) formed from a propylene resin compsn. and a substrate layer (II). The resin compsn. is prepd. by dynamically heat treating a blend comprising 100 pts.wt. propylene-α-olefin block copolymer having a ratio (η1 /η2 ) of the melt viscosity (η1 ) measured by the slit die method under a shear rate of 10<1> sec<-1> to that (η2 ) measured under a shear rate of 10<2> sec<-1> of 3.5-8, 5-150 pts.wt. rubbery polymer, and 0.005-2 pts.wt. org. peroxide and has a melt flow rate (measured according to JIS K 7210 at 230 deg.C under 2.16kg-load) of 50-300g/10min.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a multi-layer excellent in surface flexibility, peel strength and embossing workability, which is preferably used in the fields of interior materials such as ships, vehicles and buildings, and electric / electronic parts. Regarding a laminate.

[0002]

2. Description of the Related Art A laminated body by a hot stampable molding method is a molding method obtained by directly laminating a semi-molten sheet extruded from a die of a sheet molding machine on a base material and then embossing it. The laminated body is advantageous in terms of cost because it is not necessary to reheat the sheet raw material once solidified as in the conventional molding method, and is a laminated body that has been drawing attention in recent years. As a resin suitable for this molding method, for example, a highly fluid polypropylene resin (Japanese Patent Laid-Open No. 2-80218, etc.) or an olefin-based thermoplastic elastomer (Japanese Patent Laid-Open No. 4-7311)
No. 2, JP-A-4-73142) and the like have been proposed.

[0003]

However, in any of the resins of the above-mentioned methods, the crystallization rate is high, so that the solidification progresses immediately after being extruded from the die, the stampable moldability is poor, and the flexibility is insufficient. There is a problem that the adhesive strength with the base material is low. In addition, these laminates are often subjected to so-called embossing, in which the surface is uneven in order to give a high-grade feeling, but the above-mentioned resin also has a problem that this embossing property is poor. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a multilayer laminate having excellent surface flexibility, peeling strength, and embossing workability.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by a propylene-α-olefin block copolymer having specific physical properties. Based on this, the present invention has been completed. That, (A) the ratio of the melt viscosity eta ₂ in the melt viscosity eta ₁ and a shear rate of 10 ² sec ^-1 at a shear rate of 10 ¹ sec ^-1 as measured by a slit die method (eta ₁ /
100 parts by weight of propylene-α-olefin block copolymer having η ₂ ) of 3.5 to 8, 5 to 150 parts by weight of (B) rubber-like polymer, and (C) 0.00 of organic peroxide.
Melt flow rate obtained by dynamically heat-treating a blend consisting of 5 to 2 parts by weight (measured in accordance with JIS K7210 at a temperature of 230 ° C. and a load of 2.16 kg)
At least 2 of the layer (I) and the base material layer (II) each of which is composed of a propylene resin composition prepared to 50 to 300 g / 10 min.
It is intended to provide a multi-layer laminate comprising layers. Hereinafter, the present invention will be specifically described.

The propylene-α-olefin block copolymer (A) used for the layer I in the present invention (hereinafter referred to as "BP
P ") is a block copolymer composed of a polypropylene block and a copolymer block of propylene and another α-olefin. A preferred example of the BPP of the present invention is a block copolymer comprising a polypropylene block and a copolymer block of propylene and an α-olefin having 1 to 12 carbon atoms (excluding 3). Examples of the α-olefin include ethylene, 1-butene, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, 4-dimethyl-1-pentene, vinylcyclopentane, vinyl. Cyclohexane etc. are mentioned. These α-olefins may be used alone or in combination of two or more. The proportion of the copolymer rubber block in the total copolymer is generally 3
0 to 70% by weight, preferably 35 to 68% by weight,
Especially, 40 to 65% by weight is preferable.

The BPP of the present invention has a melt viscosity η ₁ at a shear rate of 10 ¹ sec ^-1 measured by the slit die method.
And the melt viscosity η ₂ at a shear rate of 10 ² sec ^-1 (η ₁ / η ₂ ) must be 3.5 to 8.
The measurement method by the slit die method is a method of measuring the melt viscosity at a temperature of 170 ° C. using a slit die having a width of 20 mm, a height of 1.5 mm and a length of 60 mm. See CDHan; Rheology in Polymer Proc for this method.
essing, Academic, New York (1976) and JL White; Pri
nciples of Polymer Engineering Rheology, John Wile
y, New York (1990) has detailed description.

Specifically, a viscometer having a commercially available slit die (Labo Plastomill D20-2 manufactured by Toyo Seiki Seisaku-sho, Ltd.)
Type 0) can be used for measurement. Melt viscosity ratio (η
₁ / η ₂ ) is preferably 4.0 to 7.5, and particularly 4.
5 to 7.0 is preferable. If the melt viscosity ratio is less than 3.5, the drawdown is large and the sheet formability is poor. On the other hand, when it exceeds 8, the stampable moldability is deteriorated, which is not preferable.

Further, as the BPP having excellent stampable sheet moldability, those having the following physical properties (a) and (b) are preferable. That is, (a) the para-xylene insoluble content at a temperature of 25 ° C is in the range of 25 to 65% by weight, and (b) the para-xylene soluble content at a temperature of 25 ° C is (i) an average propylene content based on a 2-site model. (FP) 20 to 80 mol%, (ii) propylene content (P _P) of the copolymer to produce a propylene active sites polymerized preferentially in 2 site model (P _H) 65 to
90 mol% and (iii) the proportion of P _H occupied in the copolymer (P _f1) is in the range of 0.40 to 0.90. (A) Paraxylene insoluble matter means BPP at a temperature of 130 ° C.
It is an insoluble component when it is dissolved in para-xylene at about 1% by weight and then cooled to 25 ° C., and the BPP of the present invention is 25 to 6
5% by weight is preferable, and 30 to 60% by weight is particularly preferable. Further, the (b) para-xylene soluble component is a component dissolved by the above-mentioned operation, and the properties obtained by the two-site model are preferably within the above range.

Here, 2 of propylene-α-olefin
The site model will be described by taking a propylene-ethylene copolymer as an example. An example of a nuclear magnetic resonance ( ¹³ C-NMR) spectrum of isotope carbon of a propylene-ethylene copolymer is shown in FIG. The spectra are shown in (1) to (10) due to the difference in the chain distribution (the arrangement of ethylene and propylene).
0 peaks appear. The name of this chain is Carman, C,
J, et al; Macromolecules, Vol. 10, p536-544 (1977), and the name is shown in Fig. 2. Such a chain is
Assuming the reaction mechanism of copolymerization, it can be expressed as a reaction probability (P), and when the overall peak intensity is 1.
The relative intensities of the peaks (1) to (10) can be expressed as a probability equation based on Bernoulli statistics with P as a parameter. For example, in the case of (1) Sαα, assuming that the propylene unit is the symbol p and the ethylene unit is the symbol e, the possible chains are [pppp], [pppe], and [eppe].
And each of them is represented by a reaction probability (P),
Add up. The remaining peaks (2) to (10) can be obtained by formulating equations in a similar manner and optimizing P so that the peak intensity actually measured and those 10 equations are closest to each other. .

The two-site model is a model that assumes this reaction mechanism. HNCHENG; Jounal of Applied Polymer
Sience, Vol.35 p1639-1650 (1988). That is, in the model of copolymerizing propylene and ethylene using a catalyst, propylene content of the copolymer generated at the active sites of polymerization preferentially propylene _{(P H)} (P P)
Assuming two of the propylene content (P ' _P ) of the copolymer formed at the active site where ethylene and ethylene are preferentially polymerized,
_{When the} ratio of _H in the copolymer (P _f1 ) is used as a parameter, the probability equation shown in Table 1 below is obtained.

[0011]

[Table 1]

[0012] Therefore, the relative intensity of the ¹³ C-NMR spectrum as described above, P _P so that the probability equations shown in Table 1 are the same, by optimizing three parameters P _'P and P _f1 Desired.

The (i) average propylene content (FP) of the para-xylene solubles in the BPP of the present invention is determined by the following equation using the above three parameters. _{FP = P P × P f1 +} P 'P × (1-P f1) ( mol%) FP obtained by the above formula is preferably from 20 to 80 mol%, more preferably from 30 to 70 mol%. Also,
Among the above parameters, (ii) P _P is 65 to 90 mol%
Is preferable, and 70 to 85 mol% is particularly preferable.
Furthermore, (iii) P _f1 is preferably 0.40 to 0.90,
Especially, 0.48 to 0.82 is preferable.

The polymerization of BPP of the present invention is carried out in the presence of an inert hydrocarbon such as hexane, heptane, kerosene or a liquefied α-olefin solvent such as propylene in a slurry method,
The temperature condition is room temperature to 130 ° C., preferably 50 to 90 ° C., pressure 2 to 50, by a gas phase polymerization method in the absence of a solvent.
It is carried out under the condition of kg / cm ² . As the reactor in the polymerization step, those usually used in the technical field can be appropriately used, and examples thereof include a stirred tank reactor, a fluidized bed reactor, a circulation reactor, and a continuous type, a semi-batch type, or a batch type. Either method may be used. Specifically, it can be obtained by using a known multistage polymerization method. That is, it is a method of polymerizing propylene and / or a propylene-α-olefin copolymer in the first stage reaction, and then copolymerizing propylene and α-olefin in the second stage reaction, for example, JP-A-3-97747. Publication, JP-A-3-
205439, JP 4-153203, JP 4-261423
Japanese Patent Application Laid-Open No. 5-93024 and the like. The melt flow rate (hereinafter referred to as “MFR”) measured by the above method at a temperature of 230 ° C. according to JIS K7210 of BPP and a load of 2.16 kg is usually 50.
g / 10 minutes or less.

The rubbery polymer (B) used in the present invention is not particularly limited and includes, for example, natural rubber (NR); butadiene rubber (BR), isoprene rubber (IR), chloroprene rubber (CR), styrene. -Butadiene rubber (S
BR), isobutene-isoprene rubber (IIR), acrylonitrile-butadiene rubber (NBR), ethylene-
Propylene copolymer rubber (EPR), ethylene-propylene-non-conjugated diene copolymer rubber (EPDM), propylene-butene rubber, butyl rubber, silicone rubber, fluorosilicone rubber, nitrile rubber, epichlorohydrin rubber and other synthetic rubbers; styrene / isoprene-styrene Block copolymer (SIS), styrene-ethylene / isoprene-styrene block copolymer (SEPS), styrene /
Examples thereof include various thermoplastic elastomers such as styrene-based elastomers such as butadiene-styrene block copolymer (SBS) and styrene-ethylene / butylene-styrene block copolymer (SEBS), olefin elastomers and ester elastomers. Furthermore, low molecular weight rubbers such as polybutene, artic polypropylene (APP); liquid BR, liquid IR, liquid CR
Liquid rubbers such as; chlorinated polyethylene such as chlorinated polyethylene and chlorinated ethylene-propylene copolymer rubber; and chlorosulfonated polyethylene. Among these, EPR, EPDM, hydrogenated SBR, S
EPS or the like is preferably used. Many grades of the above various rubbery polymers are sold as commercial products, and in the present invention, these commercial products can be appropriately used. Further, two or more kinds may be mixed and used.

The blending ratio of the component (B) with respect to 100 parts by weight of BPP of the present invention is 5 to 150 parts by weight.
˜140 parts by weight is preferred, with 15 to 130 parts by weight being especially preferred. If the blending ratio of the component (B) is less than 5 parts by weight, the flexibility is poor. On the other hand, if it exceeds 150 parts by weight, mechanical strength is lowered, which is not preferable.

The (C) organic peroxide used in the present invention is not particularly limited, but the decomposition rate of BPP at the melting temperature is more than 1 second as the half-life and the decomposition at 300 ° C. A speed of 10 minutes or less is preferable. Specifically, t-butyl hydroperoxide, dicumyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, benzoyl peroxide, methyl isobutyl ketone peroxide,
Examples thereof include t-butyl perbenzoate, diisopropyl peroxydicarbonate, vinyl tris (t-butyl peroxy) silane and the like. The mixing ratio of these organic peroxides is 0.005-2 with respect to 100 parts by weight of BPP.
0.01 to 1.8 parts by weight is preferable, and 0.02 to 1.5 parts by weight is particularly preferable. If the blending ratio is less than 0.005 part by weight, the fluidity will be insufficient. On the other hand, 2
If the amount is more than parts by weight, problems such as coloring of the molded article and surface stickiness occur.

The MFR of the composition used in the layer I of the present invention can be prepared by dynamically heat-treating the blend of the above components. As the heat treatment method, a conventionally known melt kneading method can be adopted. For example, a method of kneading using a mixer such as an open roll, a Banbury mixer, a kneader, or an extruder can be used. The treatment temperature is generally 170 to 280 ° C., 190 to 260
C is preferred. The MFR thus prepared is 50 to 30.
It is necessary to be in the range of 0 g / 10 minutes, and 60 to 2
70 g / 10 min is preferred, especially 70-250 g /
10 minutes is preferred. When the MFR is less than 50 g / 10 minutes, the stampable moldability is deteriorated. On the other hand, 300g / 10
If it exceeds the limit, mechanical strength becomes insufficient, which is not preferable.

The plasticizer (D) used in the present invention is at least one selected from the group consisting of mineral oil type softeners, phthalate ester type plasticizers and silicone oils. The mineral oil-based softening agent is a petroleum fraction having a high boiling point, and has various types such as paraffin-based, naphthene-based, and aromatic-based, and is used as a softening agent during rubber processing. Of these, paraffinic softeners are preferable. Phthalate ester plasticizers are used as plasticizers for vinyl chloride resins, and include, for example, dimethyl phthalate, diethyl phthalate, diisobutyl phthalate, dibutyl phthalate, diheptyl phthalate, di-n-octyl phthalate. , Di-2-ethylhexyl phthalate, diisooctyl phthalate,
Examples thereof include di-n-octyl phthalate, dinolyl phthalate, diisodecyl phthalate, ditridecyl phthalate, dicyclohexyl phthalate, butylbenzyl phthalate, butyllauryl phthalate, and methyloleyl phthalate. Of these, dimethyl phthalate, diethyl phthalate and diisobutyl phthalate are preferred.

Silicone oil is a fluid oily substance mainly composed of linear diorganopolysiloxane,
It is used as an additive for hydraulic oils, mold release agents, defoamers, paints and cosmetics. Specific examples include dimethylpolysiloxane, monomethylpolysiloxane, methylphenylpolysiloxane, alkyl-modified silicone, amino-modified silicone, epoxy-modified silicone, carboxyl-modified silicone, mercapto-modified silicone, alkyl higher alcohol-modified silicone, alcohol-modified silicone, chloroalkyl. Examples include modified silicone, polyether modified silicone, and fluorine modified silicone.
Of these, dimethylpolysiloxane, monomethylpolysiloxane and methylphenylpolysiloxane are preferable.

In the layered product of the present invention, by adding the component (D), a "moist feeling" is imparted to the surface feel, so that it is particularly preferably used in the field where such a feel is required. As a compounding method, the above components may be blended from the beginning, or a blend of the above components may be dynamically heat treated and added. In the present invention, the composition ratio of the component (D) to 100 parts by weight of BPP is 1 to 30 parts by weight, preferably 2 to 25 parts by weight, and particularly preferably 3 to 20 parts by weight. If the composition ratio is less than 1 part by weight, a moist feeling cannot be obtained and the crystallization retarding effect is poor. On the other hand, if it exceeds 30 parts by weight, it may cause bleed-out, which is not preferable.

Further, in the composition of the layer I of the present invention, additives conventionally used by those skilled in the art such as antioxidants, weather resistance stabilizers, antistatic agents, lubricants, antiblocking agents, antifog agents, You may mix | blend a pigment, a filler, etc. suitably in the range which does not impair the objective of this invention. It is one layer of the present invention
The type of base material used for the II layer is not limited, and materials used by those skilled in the art can be appropriately selected and used according to the application. As a specific example,
Examples thereof include synthetic resins such as polypropylene, resin composite materials containing various fillers, other composite materials, plywood, metal, gypsum, and the like. Also, as its form, a film,
Various materials such as plates, foams, honeycombs, and laminated bodies can be used. The laminate of the present invention can be used not only as a laminate of two layers but also as a laminate of three or more layers by adding a foam layer or the like as an intermediate layer for the purpose of imparting flexibility.

[0023]

The present invention will be described in more detail with reference to the following examples. In addition, the measuring method of each physical property is shown below. [Analysis of Para-Xylene Soluble Content by Two-Site Model] Para-xylene soluble content was measured for ¹³ C-NMR spectrum with the following equipment and measurement conditions, and the respective signals were A. Zambelli et al; Macromolecules, 13 , p2
67 (1980). Measuring device JNM-GSX400 manufactured by JEOL Ltd. Measurement mode: Proton decoupling method Pulse width: 8.0 μs Pulse repetition time: 5.0 s Cumulative number of times: 20000 Solvent: 1,2,4-trichlorobenzene /
Mixed solvent of deuterated benzene (75/25% by volume) Internal circulation: Hexamethyldisiloxane Sample concentration: 300 mg / 3.0 ml Solvent measurement temperature: 120 ° C. Next, a two-site model is analyzed to determine FP, _PP and P. _{Find f1} .

(MFR) In accordance with JIS K7210,
The measurement was performed under the conditions of a temperature of 230 ° C. and a load of 2.16 kg. (Fluidity) The hot stamping molded product was visually observed and evaluated according to the following three grades. 〇 ・ ・ ・ No short shot or thick portion at all △ ・ ・ ・ There is some thick portion × ・ ・ ・ Many thick portions and short shot (Sheet appearance) Surface of hot stamping molded product Was visually observed and evaluated according to the following four grades. ◎ ・ ・ ・ ・ Very smooth 〇 ・ ・ ・ ・ Sufficiently smooth △ ・ ・ ・ ・ No smoothness and wrinkle or pockmark pattern × ・ ・ ・ ・ No smoothness, wrinkle or pockmark pattern (Peeling strength) Cut the laminate to a width of 25 mm,
The tensile test was performed using a tensile tester (RTA-100 type manufactured by Orientec Co., Ltd.) under conditions of a tensile speed of 50 mm / min. (Texture workability) In accordance with JIS B0601, the surface layer (I
The texture depth (R ₁ ) of the layer) was measured using a Hommel Tester T1000 type manufactured by OHOMMELWERKE GmbH, and the ratio (R ₁ / R ₂ ) to the texture depth (R ₂ ) of the mold was expressed in%. Was defined as the grain transfer rate. (Surface hardness) The surface of the layer I of the laminate was measured by Shore A according to ASTM D2240. (Tactile Sensitivity) The feel when the surface of the layer I of the laminate was lightly traced with a finger was expressed, and evaluated in the following three stages. 1 ・ ・ ・ ・ There is a moist feeling of resistance 2 ・ ・ ・ ・ Between 1 and 3 3 ・ ・ ・ ・ There is no feeling of resistance

Further, as a propylene-α-olefin block copolymer, polypropylene block and ethylene-
A block copolymer composed of a propylene copolymer block was used. The type (BPP1～7) and properties shown (melt viscosity ratio, the proportion of the copolymer block, paraxylene-insoluble component, and para-xylene solubles of FP, _{P P, P f1)} in Table 2.

[0026]

[Table 2]

SEPS (Septon 2043, manufactured by Kuraray Co., Ltd.), which is a styrene elastomer as a rubber-like polymer
(Hereinafter referred to as "ST"), APP (manufactured by Chiba Fine Chemical Co., Sun Attack L) (hereinafter referred to as "AP") and ethylene-propylene rubber (manufactured by Japan Synthetic Rubber Co., EP).
07) (hereinafter referred to as “EP”) was used. In addition, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane was used as the organic peroxide. As a plasticizer, Idemitsu Kosan Co., Ltd. "hydrogenation process oil PW380" (hereinafter "OL
1 ")," Dibutyl phthalate "manufactured by Kurogane Chemical Co., Ltd. (hereinafter referred to as" OL2 "), and" Dimethylpolysiloxane SH200 "manufactured by Torre Silicone Co., Ltd. (hereinafter referred to as" OL ").
3 ”) was used. Furthermore, as a base material, 20% by weight of talc (average particle size: 5 μm) was added to the polypropylene resin plate having a thickness of 3.5 mm (hereinafter referred to as “PB”) and the rigid polystyrene foam having a thickness of 3.5 mm (hereinafter referred to as “P”).
"S") was used.

Examples 1 to 18 and Comparative Examples 1 to 4 Pentaerythrityl-tetrakis [3- (3,5-di- t-butyl-4-hydroxyphenyl) propionate] 0.1 parts by weight, tris (2,2
4-di-t-butylphenyl) phosphite 0.1
Parts by weight and 0.05 part by weight of calcium stearate, and mixed by Kawada Seisakusho Super Mixer (SMV2
(Type 0), and then pelletized at a cylinder temperature of 210 ° C. using a twin-screw extruder (KTX-37 type) manufactured by Kobe Steel. M for each pellet obtained
FR was measured. Also, using a hot stamping molding machine (Model FSM450 manufactured by Takahashi Kogyo Co., Ltd.), the pellet temperature of each pellet was 220 ° C., the clamping pressure was 200 tons, and the mold temperature was
A container (600 mm in length, 800 mm in width, 800 mm in width, extruded and stamped on the base material of layer II shown in Table 3 under the condition of 0 ° C.
A height of 5 mm and a thickness of 3 mm) was obtained. The fluidity and surface appearance of each container were visually evaluated. Further, the peel strength and the wrinkle retention rate were measured. A metal mold having a texture depth of 70 μm was used for the I layer side. The above results are shown in Table 4.

[0029]

[Table 3]

[0030]

[Table 4]

[0031]

The multi-layer laminate of the present invention is excellent in surface flexibility, peel strength and embossing workability, so that it can be used for ships, vehicles,
It is useful in the field of interior materials such as buildings and electric / electronic parts.

[Brief description of drawings]

FIG. 1 is an example of a nuclear magnetic resonance spectrum of isotope carbon of an ethylene-propylene copolymer.

FIG. 2 is a diagram showing names of carbons derived from a chain distribution in polyolefin.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C08K 5/12 5/14 C08L 83/04 LRY 91/00 LSG

Claims (4)

[Claims] 1. A (A) a shear rate of 10 ¹ sec as measured by a slit die method ^- the ratio of the melt viscosity eta ₂ at a melt viscosity at ¹ eta ₁ and a shear rate of _{^{10 2 sec -1 (η 1 /}} η
₂ ) 100 to 100 parts by weight of a propylene-α-olefin block copolymer having 3.5-8, (B) a rubbery polymer 5
To 150 parts by weight and (C) organic peroxide 0.005
A melt flow rate (measured according to JIS K7210 at a temperature of 230 ° C. and a load of 2.16 kg) obtained by dynamically heat-treating a blend consisting of 2 to 2 parts by weight is adjusted to 50 to 300 g / 10 minutes. At least 2 of a layer (I) and a base material layer (II) made of the prepared propylene resin composition.
Multilayer laminate consisting of layers. 2. 100 parts by weight of the component (A), (B)
Component 5 to 150 parts by weight, component (C) 0.005 to 2 parts by weight, and (D) at least one plasticizer selected from the group consisting of mineral oil-based softeners, phthalate ester-based plasticizers and silicone oils. A layer (I) and a base material layer (II) comprising a propylene resin composition having a melt flow rate of 50 to 300 g / 10 min, which is obtained by dynamically heat treating a blend comprising 1 to 30 parts by weight. And a multilayer laminate comprising at least two layers. 3. The component (A) is a polypropylene block, propylene and 2 to 12 carbon atoms (excluding 3).
Of the α-olefin copolymer block, and the copolymer block accounts for 30% of the total copolymer.
The multi-layer laminate according to claim 1 or 2, wherein the multilayer laminate has a content of about 70% by weight. 4. The multilayer laminate according to claim 1, wherein the component (A) has the following physical properties (a) and (b). (A) Para-xylene insoluble matter at a temperature of 25 ° C.
65% by weight (b) Para-xylene solubles at a temperature of 25 ° C is (i)
Average propylene content (FP) of 2 site model is 2
0 to 80 mol%, (ii) a copolymer (P) formed at an active site that preferentially polymerizes propylene in a two-site model
Percentage propylene content (P _P) is 65 to 90 mol% and the (iii) P _H of _H) occupied in the copolymer (P _f1) is zero.
40 to 0.90