JP2000026670A - Resin composition and preparation thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide resin compositions excellent in flexibility, rubber- characteristic elasticity, tensile strength, heat resistance, oil resistance, flame retardance and processability at kneading and having no affect of inducing dechlorination of chlorinated polyolefins in the continuous production, and a process for producing the resin composition. SOLUTION: In kneading a mixture of a straight chain ethylene/α-olefin copolymer produced with the use of a single site catalyst represented by a metallocene catalyst and a chlorinated polyolefin such as a chlorinated polyethylene at a ratio of 10:90 to 90:10, 2-20 wt.%, based on the mixture, hydrochloric acid scavenger is added to the mixture beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin composition using an olefin-based copolymer and a chlorinated polyolefin, and a method for producing the same.

[0002]

2. Description of the Related Art Typical general-purpose resins include, for example, LL
There is a mixed composition of chlorinated polyethylene with DPE (linear low density polyethylene), ULDPE (ultra low density polyethylene), EVA (ethylene vinyl acetate copolymer) or PVC (polyvinyl chloride). On the other hand, typical general-purpose rubbers include, for example, NR (natural rubber), SBR
(Styrene butadiene rubber), NBR (nitrile butadiene rubber), EPDM (ethylene propylene diene terpolymer), CR (chloroprene rubber) or CSM
(Chlorosulfonated polyethylene) and the like and a chlorinated polyethylene.

[0003] These compositions are kneaded with a filler, a stabilizer, an antioxidant, a plasticizer or a flame retardant, etc., depending on the purpose, and are also used as an organic peroxide-based crosslinking agent or general-purpose rubber. It is used to produce various molded articles by crosslinking with a vulcanizing agent for rubber used.

[0004]

However, the conventional composition obtained by mixing the above-mentioned resin and chlorinated polyethylene lacks flexibility and rubber-like elasticity, while mixing the above-mentioned general-purpose rubber with chlorinated polyethylene. However, there is a problem that sufficient properties cannot be obtained, for example, the strength of the conventional composition is extremely reduced. Further, when these compositions are continuously kneaded with a production machine, there is a problem that the kneaded material generates a large amount of heat, induces dechlorination of the chlorinated polyethylene, and adversely affects other resins or rubbers. Further, general-purpose resins are generally supplied in the form of pellets, and general-purpose rubbers are generally supplied in the form of blocks, whereas chlorinated polyethylene is supplied in the form of particles close to powder. Therefore, the change in the fluidity and the viscosity due to the temperature greatly differ between these materials, so that kneading is difficult, for example, unmelted material remains during kneading.

[0005] In view of the above problems, an object of the present invention is to provide:
Flexibility, rubber specific elasticity, tensile properties, heat resistance, oil resistance,
It is an object of the present invention to provide a resin composition which is excellent in flame retardancy and processability at the time of kneading and which is not affected by induction of dechlorination from chlorinated polyolefin during continuous production, and a method for producing the same.

[0006]

According to the present invention, a linear ethylene-α-olefin copolymer produced using a single-site catalyst typified by a metallocene catalyst and a chlorinated polyolefin such as chlorinated polyethylene are used. By pre-mixing the mixture with a hydrochloric acid scavenger, the flexibility, without being affected by the induction of dechlorination even during continuous production
Rubber-specific elasticity, tensile properties, heat resistance, oil resistance, flame retardancy,
It has been found that a composition excellent in workability at the time of kneading is obtained, and the present invention has been completed based on this finding.

That is, the resin composition according to the present invention comprises a linear ethylene-α-olefin copolymer and a chlorinated polyolefin such as chlorinated polyethylene in a ratio of 10:90.
A composition comprising 90:10 by weight, characterized in that it contains 2 to 20% by weight of hydrochloric acid scavenger with respect to the composition.

Here, the linear ethylene-α-olefin copolymer is preferably an olefin copolymer produced using a single-site catalyst such as a metallocene catalyst.

In the method for producing such a resin composition, in the present invention, a linear ethylene-α-olefin copolymer and a chlorinated polyolefin such as chlorinated polyethylene are used in a weight ratio of 10:90 to 90:10. When kneading a mixture mixed in a ratio, 2 to 20% by weight of a hydrochloric acid scavenger is added to the mixture.

[0010] The resin composition according to the present invention is characterized in that, when a mixture of a linear ethylene-α-olefin copolymer and a chlorinated polyolefin is continuously kneaded by a production machine, even if the temperature of the kneaded material is increased, Since a scavenger is added, hydrochloric acid released from the chlorinated polyolefin is converted into linear ethylene-α-
Stable production can be performed without being affected by heat, for example, without affecting the olefin-based copolymer.
Also, by simply changing the mixing ratio of the linear ethylene-α-olefin-based copolymer and the chlorinated polyolefin, it is possible to impart mechanical strength, heat resistance, oil resistance, and flame retardancy according to the application, so that electric wire coating is possible. It can be used in various fields as industrial materials such as materials, high-power parts, automobile parts, and building materials.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In a resin composition and a method for producing the same according to the present invention, a linear ethylene-α-olefin-based copolymer produced using a single-site catalyst such as a metallocene catalyst, and a chlorinated polyethylene are used. When kneading a mixture obtained by mixing the chlorinated polyolefin with a chlorinated polyolefin at a ratio of 10:90 to 90:10, 2 to 20% by weight of a hydrochloric acid scavenger is added to the mixture. Therefore, before describing each example, each component used in producing the composition according to the present invention, its mixing ratio, and the like will be described.

(A) Linear Ethylene-α-Olefin Copolymer The linear ethylene-α-olefin copolymer is different from conventional LLDPE and ULDPE by using a single-site catalyst typified by a metallocene catalyst. It is an olefin copolymer with different properties and can be used for extruder molding, injection molding, mold molding using a compression press, or calender molding used in the molding process using general-purpose resin or general-purpose rubber. It is.

The linear ethylene-α-olefin copolymer has a specific gravity (according to JIS K-7112-80) of 0.860 to 0.910 and a melt flow rate (hereinafter, referred to as “JIS K-7112-80”).
MFR. / Based on JIS K-7210-76. )
Is 230 ° C., 2.16 kg, 0.1 to 20 g / min. Mooney viscosity (hereinafter referred to as ML121 ° C 4-minute value).
/ Based on JISK-6300. ) Is 10 to 50.
Surface hardness Shore-A (hereinafter referred to as hardness./JISK-
6301. ) Is 50 to 90. The crystal melting point (hereinafter, referred to as DSC) by DSC measurement is 40 to 110.
° C. Breaking strength of tensile properties (hereinafter, referred to as TB) is ^{60kg / cm 2 ~350kg / cm 2} . The tensile elongation at break (hereinafter referred to as EB / according to JIS K-6301) is 300 to 1000%. Here, as the linear ethylene-α-olefin copolymer, specific gravity of 0.8
63-0.908, MFR 0.3-15 g / 10 min, Mooney viscosity 30-45, hardness 50-85, DSC 40-
95 ° C., tensile properties of TB 70 to 350 kg / cm ² , E
B500 to 900% is preferably used. In particular, the MFR is 0.5 to 10 g / 10 min, and the Mooney viscosity is 25.
-40, hardness 45-80, DSC 35-90 ° C, tensile properties of TB 90-350 kg / cm ² , EB600-8
It is preferred to use 00% of a linear ethylene-α-olefin copolymer.

(B) Chlorinated polyolefin The chlorinated polyolefin used in the present invention is obtained by chlorinating polyolefin powder or particles in an aqueous suspension,
Alternatively, it is obtained by chlorinating a polyolefin dissolved in an organic solvent, but is preferably obtained by the former method. The chlorine content of the chlorinated polyolefin is usually from 20 to 50% by weight, particularly preferably from 25 to 45% by weight. If the chlorine content is less than 20% by weight, the amount of residual crystals becomes too large, and a flexible rubber tends not to be obtained. On the other hand, the chlorine content is 50% by weight.
If it exceeds, the rubber elasticity becomes poor. Further, as for the chlorinated polyolefin, non-crystalline one is preferable because it has excellent flexibility. As the polyolefin,
Ethylene homopolymer, or ethylene and carbon number 3
And a copolymer with an α-olefin of from 12 to 12. The copolymerization ratio of α-olefin is usually 30% by weight.
Or less, preferably 20% by weight. Specific examples of the chlorinated polyolefin include chlorinated polyethylene, chlorinated ethylene-propylene copolymer, chlorinated ethylene-propylene-diene copolymer, and the like.

(C) Hydrochloric acid scavenger The following composition is preferable as the hydrochloric acid scavenger used in the present invention.

(C-1) Lead Compound and Basic Salt of Lead Representative examples of the lead compound and the basic salt of lead include lead oxide and tribasic lead sulfate, respectively. The average particle size of these lead compounds and basic salts of lead is generally 0.5 to 7 μm, preferably 0.5 to 5 μm.
It is preferable to use Particularly preferred are lead compounds and basic salts of lead having an average particle size of 0.3 to 3 μm.

(C-2) Metal stearate Salts Typical examples of the metal stearate include calcium stearate and barium stearate. The average particle size of the metal stearate is generally 0.1 to 5 μm.
m, but preferably 0.1 to 3 μm. Particularly preferably, the average particle size is 0.1 to
It is preferable to use a metal stearic acid salt of 2 μm.

(C-3) Magnesium Oxide Magnesium oxide preferably has a particle size passing through 100 mesh, a specific surface area for N ₂ adsorption of 150 m ² / g, and an iodine adsorption capacity of 150 mm / g.

(C-4) Epoxy compound The epoxy derivative has an epoxy group in the molecule.
There are epoxycyclohexane derivatives, epoxidized unsaturated fatty acid esters, epoxycyclohexane derivatives, epichlorohydrin derivatives and the like. A typical example is ADK
Sizer-0130P (trade name / manufactured by Asahi Denka).

(C-5) Tin Compound The organotin stabilizer is represented by the general formula R _n SnY _4-n . Here, R is a butyl group or an n-octyl group. As Y, a laurate group, a malate group, and a mercapto group are used. As a typical example of the organotin compound, octyltin-based compound includes Stan OMF (trade name / Sanyo Co., Ltd.). This organic tin compound has a melting point of 91 to 110 ° C.
Is a white powder and is a product conforming to FDA pass standard JHPA.

(D) Composition Ratio of Olefin Copolymer and Chlorinated Polyolefin The proportion of the total amount of linear ethylene-α-olefin copolymer and chlorinated polyolefin in the total amount is 90 to 10 parts by weight of an α-olefin-based copolymer and 10 to 90 parts by weight of a chlorinated polyolefin, and preferably 80 to 2 parts of a linear ethylene-α-olefin-based copolymer.
0 parts by weight and 20 to 80 parts by weight of chlorinated polyolefin. Particularly preferred is a linear ethylene-α-olefin-based copolymer olefin-based copolymer 75 to 25 parts by weight,
It is 25 to 75 parts by weight of the chlorinated polyolefin. When the proportion in the total amount of the linear ethylene-α-olefin-based copolymer and the chlorinated polyolefin is about 90 parts by weight or more, or about 10 parts by weight or less, respectively, heat resistance, oil resistance, and difficulty are improved. The flammability characteristics cannot be balanced, and the desired characteristics cannot be obtained.

(E) Crosslinking Aid and Crosslinking Agent As the crosslinking aid and the crosslinking agent, a composition of a linear ethylene-α-olefin copolymer, a chlorinated polyolefin and a hydrochloric acid scavenger is used in a non-crosslinked state. It is not necessary in such cases, but is an essential substance when used as a crosslinked product.

(E-1) Polyfunctional Compound (E-1-1) Fire IC-S (trade name) Fire IC-S is composed of triallyl isosialate (see chemical formula (1)) and triallyl. A mixed composition of sialylate (see chemical formula (2)), that is, a composition in which 0.05 to 1.5 parts by weight of triallyl sialate is mixed with 1 part by weight of triallyl isosialate in a liquid state Solidification, which is a disadvantage of triallyl isosialate or triallyl sialylate, without compromising the chemical properties of triallyl isosialate and triallyl sialylate and the properties of organic peroxides as crosslinking aids (24 ° C. to 26 ° C.). This composition maintains fluidity even under low-temperature storage conditions at an average temperature of about 0 ° C., so that the composition is conventionally 24 ° C. to 26 ° C.
It is not necessary to heat and re-melt the solidified material, unlike the one that re-solidifies below. In particular, when the crosslinking aid and the crosslinking agent are impregnated into the pellet-shaped resin, the resin can be uniformly mixed by spraying the crosslinking aid and the crosslinking agent while stirring the resin with a Hensyl mixer. It is easy to handle.

[0024]

Embedded image

[0025]

Embedded image

(E-1-2) Tike Tike (TAIC: trade name / Nippon Kasei Co., Ltd.) is a symmetric trifunctional triazine compound (triallyl isosialate) containing a nitrogen atom, and has an allyl group in the side chain. It is widely used as a crosslinking aid for organic peroxide crosslinking and radiation crosslinking of general-purpose resins or rubbers, taking advantage of its properties of having a group and a ring structure.

(E-1-2) Parker link 300 (TA
(C: trade name / Kyaku Akzo Co., Ltd.) Parkerlink 300 is a triallyl sialate having a structural formula and a molecular weight as shown below, which have the same properties as TAIC.

(E-2) Organic peroxide The type of the organic peroxide used in the present invention is not particularly limited. For example, the decomposition temperature (temperature at which the half-life is 1 minute) is 120 ° C. The above-mentioned organic peroxides are preferable, and particularly, an organic peroxide at 140 ° C. or more to 190 ° C. is preferable. Representative examples of such suitable organic peroxides include 1,1, -t-butylperoxy-3,3,5-
Peroxyketals such as trimethylcyclohexane, dialkyl peroxides such as 2,5-dimethylhexane-2,5-dihydroperoxyhexide, and t-butylperoxy-3,5,5, -trimethylhexanone And percarbonates such as alkyl peresters and t-butylperoxyisopurple carbonate.

(F) Composition Ratio In the resin composition of the present invention, the composition ratio of other components to 90 to 10 parts by weight of the linear ethylene-α-olefin copolymer and 10 to 90 parts by weight of the chlorinated polyolefin Is as follows.

First, the compounding ratio of the hydrochloric acid scavenger is 2 to 30 parts by weight, preferably 2 to 25 parts by weight, particularly preferably 3 to 20 parts by weight. The addition amount of the hydrochloric acid scavenger increases as the proportion of the chlorinated polyolefin increases, but may be smaller in the composition range where the proportion of the linear ethylene-α-olefin copolymer is large. Here, regarding the hydrochloric acid scavenger, a lead compound, a stearic acid base,
Any of magnesium oxide, epoxy compounds, tin compounds and the like may be used alone or in combination.

Next, the content of the polyfunctional compound is 0.5 to 1
The amount is 5 parts by weight, preferably 0.5 to 10 parts by weight, particularly preferably 0.5 to 7 parts by weight. If the compounding ratio of the polyfunctional compound is less than 0.5 part by weight, the properties after crosslinking are not sufficiently improved. On the other hand, if the amount exceeds 15 parts by weight, the characteristics are not further improved.

On the other hand, the compounding ratio of the organic peroxide is 0.5 to 15 parts by weight, preferably 1.0 to 10 parts by weight, particularly preferably 0.5 to 7 parts by weight. .
If the compounding ratio of the organic peroxide is less than 0.5 parts by weight, the properties after crosslinking are not sufficient. On the other hand, if it exceeds 15 parts by weight, it will be in an overcrosslinked state, and the properties will be reduced.

(G) Other additives Further additives commonly used in the field of resin or rubber, such as inorganic fillers, lubricants, plasticizers, antioxidants,
An ultraviolet absorber, a flame retardant, an antistatic agent and the like can be added.

In the region where the chlorinated polyolefin occupies a large proportion, thiourea-based, thiuram-based, and compound systems having a triazine ring, for example, 2,4,4
6-trimercapto-S-triazine agent (Zeon /
You may mix brand name ZISRET-F).

(H) Method of Mixing and Molding The resin (rubber) composition of the present invention can be obtained by uniformly mixing and kneading the above components. The mixing method for obtaining the resin composition of the present invention may be kneading using a mixer such as an open roll, a kneader or a Banbury mixer generally used in the rubber field.

The resin composition of the present invention can be formed into a desired shape by using a molding machine such as an extrusion molding machine or an injection molding machine commonly used in a general rubber industry. Furthermore, a method of producing a molded product while crosslinking (vulcanizing), that is, a method of simultaneously performing crosslinking and molding can also be applied.

[0037]

EXAMPLES An example of the resin composition according to the present invention and a method for producing the same will be specifically described.

First, the components used for producing the resin compositions according to the examples of the present invention and the comparative examples are as follows.

(Mixing of resins) As a linear ethylene-α-olefin copolymer produced using a metallocene catalyst, specific gravity 0.868, Mooney viscosity 35, MFR 0.
5. 90 to 10 parts by weight of DSC 55 ° C. engage (trade name / Dupont Dow Elastomer Co., Ltd.) was blended.

As the chlorinated polyolefin, a chlorine content of 36
%, Specific gravity 1.16, Mooney viscosity 80, MFR 3.0,
10 to 90 parts by weight of chlorinated polyethylene having a DSC of 0.2 was blended.

(Hydrochloric Acid Scavenger) As a hydrochloric acid scavenger, 10 parts by weight of tribasic lead sulfate having an average particle diameter of 1 μm was blended.

(Crosslinking Aid) As a crosslinking aid, 2 parts by weight of Fial IC-S (a mixed composition of triallyl isosialate and triallyl sialate) was blended.

(Crosslinking agent) As a crosslinking agent, 1,1-bis-
t-butylperoxy 3,3,5-trimethylcyclohexane (trade name: Trigonox 29/40: purity 40)
%) Was blended in an amount of 5 parts by weight.

(Filler) As a filler, magnesium silicate having an average particle diameter of 1.6 μm (trade name: High Filler #
5000PJ) was blended in an amount of 50 parts by weight.

(Plasticizer) As a plasticizer, 10 parts by weight of tri- (2-ethylhexyl) trimellitate (trimellitic acid ester derivative / trade name: ADK-Sizer-C-8) was blended.

(Kneading conditions by pressure kneader)
Using an 8 liter test kneader (manufactured by Toshin Co., Ltd.), a set temperature of 80 ° C., a charged amount of 83%, a linear ethylene-α-olefin-based copolymer produced using a metallocene catalyst, chlorinated polyethylene, hydrochloric acid After the collective administration of the capturing agent, a process of pressurization 30 minutes-ram-up-reversal-injection-pressurization 3 minutes-ram-up-reversal-injection-pressurization 1 minute is performed, and then the kneaded dough is removed. Discharge. The temperature of the kneaded dough at the time of discharge is 150 to 160 ° C.

(Kneading of Crosslinking Aid, Crosslinking Agent, Filler and Plasticizer by Open Roll)
Using a 10-inch test roll, set the temperature to 50-60 ° C.
Set to. In this open roll machine, the dough kneaded by a kneader is wound around a roll, and a crosslinking aid and a crosslinking agent are added and kneaded in this order to form a sheet. When a filler and a plasticizer are added, they are added before adding a crosslinking aid and a crosslinking agent. In the kneading using the open roll, the roll temperature was set at 50 to 60 ° C.

(Test Method and Preparation of Test Sample) The test method and test sample preparation method used in each of the examples and comparative examples will be described.

The rebound resilience and compression set are JISK-630.
Based on 1, a cross-linked sample is produced at a temperature of 165 ° C. for 20 minutes by a pressure-type press using a mold for preparing a compression set sample. Rebound resilience is BS-903 method, compression set is JISK
Based on -6301, the sample was treated at 25% compression at 70 ° C for 22 hours, taken out, and measured 30 minutes later.

The sample of the tensile properties was at a temperature of 165 ° C. × 10 minutes,
Cross-linking was performed using a pressure-type press machine to prepare a 15 cm × 2 mm thick sheet. This sheet was also used for heat resistance, oil resistance, and flame retardancy.

From the obtained sheet, a tensile strength at break (hereinafter referred to as TBkg / cm ² ) based on JIS K-6301,
Tensile elongation at break (hereinafter referred to as EB%) and surface hardness Shore A (hereinafter referred to as hardness) were measured.

The heat resistance was measured using a gear oven at a temperature of 15
The change rates of TB and EB after the treatment at 0 ° C. for 96 hours were determined. Moreover, the hardness measured the change of hardness.

Oil resistance was measured by immersing a sample in an oil tester containing JIS No. 1 oil (paraffin oil), No. 2 oil (naphthene oil), and No. 3 oil (aromatic oil). 63
The volume change rate after the treatment at 70 ° C. for 22 hours was determined based on No. 01 (ΔV%). The properties of each oil used for oil resistance are as shown in Table 1.

[0054]

[Table 1]

The volume change rate in the oil resistance test is determined by the following equation.

[0056]

(Equation 1)

The flame retardancy was measured by an oxygen index (%) based on JIS K-7201.

The influence of heat during kneading was observed by observing the odor of the dough discharged from the kneader and coloring of the appearance.

(Samples of Examples 1 to 12 and Comparative Examples 1 to 4) Resin compositions according to Examples and Comparative Examples having the compositions shown in Table 2 were produced.

[0060]

[Table 2]

The kneading method used a pressure kneader and an open roll machine, and the effect of a hydrochloric acid scavenger for neutralizing hydrochloric acid, which is dehydrochlorinated by the heat received during kneading, was examined.

In producing the resin compositions according to Examples 1 and 2, the linear ethylene-α-olefin copolymer, the chlorinated polyethylene resin, and the hydrochloric acid scavenger were charged into a kneader and kneaded. After that, the kneading dough temperature is 150 ° C
Discharged at ~ 160 ° C. Then, after cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and a crosslinking assistant and a crosslinking agent were added in this order and kneaded to form a sheet.

In manufacturing the resin compositions according to Examples 3 and 4, a linear ethylene-α-olefin copolymer and a chlorinated polyethylene resin were rolled at a roll temperature of 50 ° C.
After winding around an open roll at 60 ° C., a hydrochloric acid scavenger, a crosslinking assistant and a crosslinking agent are added in this order and kneaded,
Created a sheet.

In preparing the resin compositions according to Examples 5 and 6, a linear ethylene-α-olefin copolymer and a chlorinated polyethylene resin, a hydrochloric acid scavenger, a filler,
The plasticizer is put into the kneader at a time and the kneaded dough temperature is 15
Discharged at 0 ° C to 160 ° C. Then, after cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and a crosslinking assistant and a crosslinking agent were added in this order and kneaded to form a sheet.

In preparing the resin compositions according to Examples 7 and 8, a linear ethylene-α-olefin copolymer and a chlorinated polyethylene resin were rolled at a roll temperature of 50 ° C.
After winding around an open roll at ６０60 ° C., a hydrochloric acid scavenger, a filler, a plasticizer, a crosslinking aid and a crosslinking agent were added in this order and kneaded to prepare a sheet.

In producing the resin compositions according to Examples 9 to 12, the mixing ratio of the linear ethylene-α-olefin-based copolymer and the chlorinated polyethylene resin was changed to collectively use the hydrochloric acid scavenger. The mixture was put into a kneader, and discharged at a kneaded dough temperature of 150 ° C to 160 ° C. Then, after cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and a crosslinking assistant and a crosslinking agent were added in this order and kneaded to form a sheet.

In producing the resin composition according to Comparative Example 1, the linear ethylene-α-olefin copolymer alone was charged into a kneader, and the temperature of the kneaded dough was 150 ° C.
Discharged at 160 ° C. Then, after cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and a crosslinking assistant and a crosslinking agent were added in this order and kneaded to form a sheet.

In producing the resin compositions according to Comparative Examples 2 and 3, a linear ethylene-α-olefin copolymer and chlorinated polyethylene were charged into a kneader, and the temperature of the kneaded dough was 150 ° C. to 160 ° C. It was discharged at a temperature of ° C. Then, after cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and a hydrochloric acid scavenger, a crosslinking assistant and a crosslinking agent were added in this order and kneaded to form a sheet.

In producing the resin composition according to Comparative Example 4, a linear ethylene-α-olefin copolymer and chlorinated polyethylene were charged into a kneader, and the temperature of the kneaded dough was 150 ° C. to 160 ° C. Discharged in state. And
After cooling to room temperature, the sheet was wound around an open roll having a roll temperature of 50 to 60 ° C., and then a crosslinking aid and a crosslinking agent were added in this order and kneaded to form a sheet.

Table 2 shows the observation results of the state of the dough discharged from the kneading machine when kneading using the kneading machine among the resin compositions thus produced.

As can be seen from Table 2, of the examples of the kneading machine, Examples 1, 2, 5, 6, 9, 10, 1
The doughs of the resin compositions according to Nos. 1 and 12 had no hydrochloric acid odor and were white. On the other hand, Comparative Example 2, in which no hydrochloric acid scavenger was added at the time of the kneading machine,
The doughs of the resin compositions according to Nos. 3 and 4 had an odor of hydrochloric acid when they were discharged from the kneader, and were colored yellow. The dough of the resin composition according to Comparative Example 1 had no smell of hydrochloric acid and was white because polychlorinated ethylene, which is a release source of hydrochloric acid, was not added. However, in the resin composition according to Comparative Example 1, since polychlorinated ethylene was not added, as described later, the oxygen index was low and the flame retardancy was poor.

Table 3 shows the results obtained by measuring various characteristics of each of the resin compositions thus produced.

[0073]

[Table 3]

First, the rightmost column of Table 3 shows the degree of influence of the temperature on the kneaded dough.
In any of the resin compositions according to Examples 1 to 12, in which the hydrochloric acid scavenger was added when kneading with a kneader or an open roll machine, heat during kneading such as hydrochloric acid odor or coloring was not observed. It could be confirmed. On the other hand, in the dough of the resin composition according to Comparative Examples 2, 3, and 4 in which the hydrochloric acid scavenger was not added at the time of being subjected to the kneader, although polychlorinated ethylene was blended,
Since no measures have been taken to suppress the adverse effects of the hydrochloric acid released from it, it was confirmed that there was an influence of heat, such as the smell of hydrochloric acid and coloring at the time of discharge from the kneader. As described above, in the resin compositions according to Examples 1 to 12, since polyethylene chloride was added, the larger the blending amount, the higher the oxygen index, the more excellent the flame retardancy, and the hydrochloric acid scavenger during kneading. , No heat during kneading such as smell of hydrochloric acid or coloring is observed. Further, merely by changing the mixing ratio of the linear ethylene-α-olefin copolymer and the chlorinated polyethylene, mechanical strength, heat resistance, oil resistance, and flame retardancy can be imparted according to the intended use. Therefore,
According to this example, a resin composition that can be used in various fields as an industrial material such as an electric wire covering material, a heavy electric component, an automobile component, and a building material can be provided.

The dough of the resin composition according to Comparative Example 1 did not have the effect of heat because polychlorinated ethylene, which is a release source of hydrochloric acid, was not added.
It is as low as 8%, resulting in poor flame retardancy.

(Other Embodiments) In the first embodiment,
In addition to the above-described examples, the resin compositions having different blending ratios and the like were evaluated, but the linear ethylene-α-olefin-based copolymer and the chlorinated polyolefin were evaluated from 10:90 to 90:10.
When kneading at a weight ratio of 2 to 20% by weight
It was confirmed that if the hydrochloric acid scavenger was added, a resin composition excellent in mechanical strength, heat resistance, oil resistance and flame retardancy could be produced without generating hydrochloric acid odor or coloring.

[0077]

As described above, in the resin composition and the method for producing the same according to the present invention, linear ethylene-α-
A composition using an olefin-based copolymer, a chlorinated polyolefin, and a hydrochloric acid scavenger, when continuously kneading a mixture of a linear ethylene-α-olefin-based copolymer and a chlorinated polyolefin with a production machine. Even if the temperature of the kneaded material becomes high, since the hydrochloric acid scavenger is added, the hydrochloric acid released from the chlorinated polyolefin does not affect the linear ethylene-α-olefin-based copolymer. Stable production is possible without being affected. Also, by simply changing the mixing ratio of the linear ethylene-α-olefin-based copolymer and the chlorinated polyolefin, it is possible to impart mechanical strength, heat resistance, oil resistance, and flame retardancy according to the application, so that electric wire coating is possible. Timber,
It can be used in various fields as industrial materials such as high-power parts, automobile parts and building materials.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C08L 23/28 C08L 23/28 F term (Reference) 4J002 BB05W BB24X CD023 CH043 DE076 DE156 DG046 EG036 EG046 EL026 EZ046 FD046 FD206 GL00 GN00 GQ00 GQ01

Claims (5)

[Claims] 1. A linear ethylene-α-olefin copolymer and a chlorinated polyolefin in a ratio of 10:90 to 90: 1.
A composition comprising at a weight ratio of 0, wherein 2
A resin composition comprising 含 む 20% by weight of a hydrochloric acid scavenger. 2. The resin composition according to claim 1, wherein the chlorinated polyolefin is chlorinated polyethylene. 3. The linear ethylene-α-olefin-based copolymer according to claim 1, wherein the linear ethylene-α-olefin-based copolymer is a linear ethylene-α-olefin-based copolymer produced using a single-site catalyst. Characteristic resin composition. 4. The resin composition according to claim 3, wherein the single-site catalyst is a metallocene. 5. The method for producing a resin composition according to claim 1, wherein the linear ethylene-α-
Olefin copolymer and chlorinated polyolefin
A method for producing a resin composition, characterized in that, when kneading a mixture mixed at a weight ratio of 0:90 to 90:10, 2 to 20% by weight of a hydrochloric acid scavenger is added to the mixture.