JPS63295669A - Thermoplastic resin composition - Google Patents

Abstract

PURPOSE:To obtain the title composition which can be easily produced at low cost and has excellent vibration damping performance, good mechanical strength, good adhesion to metal etc., by mixing chlorinated polyethylene with an ethylene copolymer and a thermoplastic resin which can melt at a specified temperature. CONSTITUTION:A thermoplastic resin composition comprising chlorinated polyeth ylene (A) (particularly desirably, amorphous chlorinated polyethylene of a chlo rine content of 27-45wt.%), an ethylene copolymer (B) of at least ethylene with an alpha,beta-unsaturated dicarboxylic acid or its anhydride (desirably, maleic anhydride) and a a thermoplastic resin (C) which can melt at 200 deg.<= (e.g., ethyl ene polymer) wherein the proportion of component A to the total weight is 5-30wt.%, and the proportion of component B to the total component B and C is 3-40wt.%. This composition can be easily produced at low cost,and has excellent sound isolation effect and vibration effect, good moldability, excellent mechanical strengths such as impact strength and tensile strength and excellent adhesion to metal or other substances. Therefore, it is useful as a vibration- damping material for various materials which are sources of noises.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention not only has excellent vibration damping properties, but also has good various mechanical strengths (for example, impact strength and tensile strength), and is suitable for metals, etc. The object of the present invention is to provide a thermoplastic resin composition that also has excellent adhesion to other substances.

[Conventional technology]

In recent years, noise from industrial machinery, sound 211 equipment, structures, and even noise from cars and motorcycles that are closely connected to social life, noise from rotating motors, musical instruments (e.g. pianos) in general residences, and sound ¥1 equipment (e.g. The noise caused by audio systems and other equipment is being closely watched as a public concern. Other problems include the noise caused by aircraft, and the vibrations and noise generated during civil engineering work and the construction of structures. Therefore, various measures to prevent these noises are required.

As a conventional noise prevention measure, a method of using a combination of materials having different functions, such as sound insulating, sound absorbing, and vibration damping materials, is generally practiced.

On the other hand, in the automobile industry and the building construction industry, in addition to noise prevention measures, fuel efficiency regulations are becoming stricter year by year. is requested.

In order to solve these problems, steel plates for panels are being made thinner, and steel plates are being replaced with aluminum-chromium alloys and plastic materials. However, in the automobile industry, as the weight of automobiles has been reduced, the vibrations of the automobiles themselves have become more intense, and in order to reduce the weight of materials and use materials with improved strength, the walls of automobiles have been reduced. In addition, in the field of architecture, the vibrations of the structures themselves are becoming more intense as space designs with fewer middle floors (spaces) are created due to the increase in high-rise buildings due to advances in design, and there is a tendency for vibrations and noise among residents to increase. ing. Therefore, how to reduce noise and vibration will be an important issue in the future.

As part of the measures to prevent this vibration and noise, recently there have been methods using vibration-proofing alloys, methods of laminating vibration-damping materials to metals, and methods of composite manufacturing in which a viscoelastic polymer substance is interposed between metals. Methods of using vibration materials or improving the vibration damping and soundproofing effects of foams have been developed and are beginning to be adopted in a wide range of fields. However, these methods have problems such as difficulty in constructing molded products of vibration damping materials and soundproofing materials, and poor moldability when molding these materials.

In general, loss coefficient, logarithmic damping rate, etc. are used as a measure of the vibration damping effect of damping materials such as damping steel plates, and among these physical property values, loss coefficient is the most commonly used. 0Normally, if the loss coefficient is 0.05,
Although it was said to have a large vibration damping effect, recently there has been a demand for materials with even higher loss coefficients.

[Problem that the invention seeks to solve]

From the above, the present invention does not have these drawbacks (problems), that is, it has excellent soundproofing and vibration damping effects, that is, it not only has a large loss coefficient, but also has good formability, and is easy to install. The objective is to obtain a material that can be implemented relatively easily.

[Means and effects for solving the problems] According to the present invention, these problems are solved by (A) in-nitrated polyethylene.

(B) an ethylene copolymer of at least ethylene and an α,β-unsaturated dicarboxylic acid or its anhydride; and (C) a thermoplastic resin that melts at 200°C; The composition ratio of the hydrogenated polyethylene is 5 to 30% by weight, and the heat n1tf! A thermoplastic resin composition in which the composition 1A of the ethylene copolymer in the total amount with the i-type resin is 3 to 40% by weight.

It can be solved by The present invention will be explained in more detail below.

(A) Chlorinated polyethylene The chlorinated polyethylene used in the present invention is obtained by preparing polyethylene powder or particles in an aqueous suspension. or by chlorination of polyethylene dissolved in an organic solvent (preferably by chlorination in an aqueous suspension), and generally its chlorine content is It is a non-crystalline chlorinated polyethylene with a weight of 25 to 45% by weight, especially chlorine content of 27%.
~45% by weight of amorphous 111-nated polyethylene is preferred.

Said polyethylene is obtained by homopolymerizing ethylene or copolymerizing ethylene with at most 20% by weight of α-olefin (generally having at most 12 carbon atoms). Its density is generally 0.910~
0.970 g/cc. Further, its molecular weight is at least 30,000, preferably 50,000 to 700,000.

Mooney viscosity (MS, 100
°C) is usually 20 to 100, and particularly preferably 25 to 80 for lφ4.

(B) Ethylene copolymer The ethylene copolymer used in the present invention is a copolymer of at least ethylene and an α,β-unsaturated dicarboxylic acid or anhydride thereof. In order to ensure the fluidity of the copolymer, a radically polymerizable comonomer having a polar group (hereinafter referred to as the "third component"), ethylene and "α,β-unsaturated dicarboxylic acid or its anhydride" are required.
(hereinafter referred to as "unsaturated dicarboxylic acid component") is preferred.

Among the unsaturated dicarboxylic acid components, the α,β-unsaturated dicarboxylic acid usually has at most 20 carbon atoms, and preferably 4 to 16 carbon atoms. Typical examples of the dicarboxylic acids include maleic acid, fumaric acid, itaconic acid, citraconic acid, 3,6-endomethylene-2,3,4,6
-Titrahydrosis-phthalic acid (nadic acid ■).

Among the α,β-unsaturated dicarboxylic acid components of the present invention, anhydrides of the α,β-unsaturated dicarboxylic acids are preferred, and maleic anhydride is particularly preferred.

Further, the third component is a radically polymerizable vinyl compound containing a polar group, and representative examples include unsaturated carboxylic acid esters, vinyl esters, and alkoxyalkyl (meth)acrylates.

The number of carbon atoms in the unsaturated carboxylic acid ester is usually 4 to 40, and 4 to 20 carbon atoms are particularly preferred. Representative examples include carbon atoms with good thermal stability such as methyl (meth)acrylate and ethyl (meth)acrylate. Those with poor thermal stability such as t-butyl (meth)acrylate are not preferred because they cause foaming.

Furthermore, the alkoxyalkyl (meth)acrylate usually has at most 20 carbon atoms. Further, it is preferable that the alkyl group has 1 to 8 carbon atoms (preferably 11 to 4 carbon atoms), and furthermore, the alkoxy group has 1 to 8 carbon atoms (preferably 1 to 4 carbon atoms). Representative examples of desirable and preferred alkoxy(meth)alkyl acrylates include methoxyethyl acrylate, ethoxyethyl acrylate, and butkiethyl acrylate. In addition, the number of carbon atoms in vinyl ester is generally at most 20 (
Typical examples include vinyl acetate, vinyl propionate, vinyl butyrate, and vinyl pivalate.

In the ethylene copolymer of the present invention, the copolymerization ratio of the unsaturated dicarboxylic acid component is usually 0.5 to 25 mol%, preferably 1.0 to 25 mol%, particularly 1.0
~20 mol% is preferred. If the copolymerization ratio of the unsaturated dicarboxylic acid component in the ethylene copolymer is less than 0.1 mol%, the adhesion and compatibility with the thermoplastic resin described later will be poor, and the #passion will be poor.

- On the other hand, if an ethylene copolymer with a content exceeding 25 mol% is used, foaming is likely to occur during molding, water absorption after molding becomes high, electrical properties deteriorate, and further manufacturing -1- and economy” - unfavorable.

Further, the copolymerization ratio of the third component is generally less than 25 mol%, preferably 1.0 to 25 mol%, particularly preferably 2.0 to 25 mol%. If an ethylene copolymer having a copolymerization ratio of the third component exceeds 25 mol % is used, the characteristics of the present invention will be exhibited, but this is not preferable from the viewpoint of production and economy.

The ethylene copolymer contains ethylene and an unsaturated dicarboxylic acid component or these and a third component in an amount of 100 to 2,500.
Kg/cm' (7) Under ultra-high pressure, 120-260
It can be produced by radical polymerization using a Tt leaving group generator such as peroxide in an autoclave equipped with a stirrer or a tubular reactor, using a chain transfer agent if necessary, at a temperature of .degree. The method for producing the copolymer is well known.

Melt index (JIS) of this ethylene copolymer
Measured in accordance with K-7210 at a temperature of 190°C and a load of 2.16 kg, hereinafter rL1. J) are usually 0.5 g/10 minutes or more, and 5.0
g 710 minutes or more is desirable, especially 50 g /
10 minutes or more is suitable.

(C) Thermoplastic resin Furthermore, the thermoplastic resin used in the present invention is
It melts at 200°C, especially 190
Those that melt at ℃ are preferred. Thermoplastic resins with melting or softening points (measured using a specific differential calorimeter) below 80°C (crystalline resins are measured as melting points, other resins are measured as softening points) have poor mechanical properties ( for example,
Impact resistance) and heat resistance are poor. On the other hand, if a thermoplastic resin that does not melt even at temperatures exceeding 200°C is used, the kneading temperature and molding temperature will be high when melting and kneading to produce the composition of the present invention and when molding the composition.
This is not preferable because the chlorinated polyethylene is thermally decomposed to cause dehydrogenation.

The thermoplastic resin is an ethylene polymer.

Impact-resistant resin obtained by graft copolymerizing at least styrene to a propylene-based polymer or rubber;
Vinyl chloride polymers, styrene polymers, methacrylate resins, low melting point polyamide resins (for example, nylon 11, nylon 12, amorphous 7-mid resin) and 111
Examples include vinylidene chloride resin.

Typical examples of ethylene polymers include ethylene homopolymer, ethylene and a small amount (generally at most 20% by weight)
A copolymer of α-olefin (usually having 3 to 12 carbon atoms), ethylene and a small amount (generally, the copolymerization ratio is 5% by weight or less) of vinyl acetate.

Random copolymers of acrylic acid, ethyl acrylate, methacrylic acid and methyl methacrylate may be mentioned. The density of the ethylene polymer is generally 0.900 to 0.980 g/ctn''.

Also, as a representative example of propylene-based polymers.

Examples include propylene homopolymers, random or block copolymers of propylene and (usually at most 20% by weight) ethylene or α-olefins (generally having 4 to 12 carbon atoms).

Furthermore, representative examples of impact-resistant resins include butadiene homopolymer rubber, styrene-butadiene copolymer rubber, acrylic ester rubber, ethylene and propylene copolymer rubber, and multicomponent copolymer rubber of ethylene, propylene and diene. Examples include grafted products obtained by graft copolymerizing styrene or styrene with 7-crylonitrile or methyl methacrylate.

In producing the impact-resistant resin of the present invention, graft polymerization methods include bulk polymerization, solution polymerization, emulsion polymerization, aqueous suspension polymerization, and methods that combine these graft polymerization methods (for example, bulk polymerization Generally, the amount of rubber used to produce 100 parts by weight of impact-resistant resin is 3 to 40 parts by weight, and 5 to 35 parts by weight. Parts by weight are preferred;
Particularly suitable is 5 to 30 parts of modified rubber. (Although methacrylate homopolymer resin or copolymer resin may be mixed, the amount of rubber material used in this case is calculated based on the mixture), monomers bonded to the rubber material as graft chains (styrene , acrylonitrile, methyl methacrylate) is usually 1,000 to 300,000, and preferably 2,000 to 200,000. Generally, it is rare for the seven polymers to be completely bonded to a rubber-like material, and it is difficult to combine with a graft material. There are homopolymers or copolymers of monomers that do not bind to the rubbery material. These homopolymers and copolymers are used as they are without separation.

Typical examples of impact-resistant resins produced as described above include butadiene homopolymer rubber, block or random copolymer rubber of styrene and butadiene (SBR), or acrylonitrile and butadiene copolymer rubber (NOR),
Acrylonitrile-phtadiene obtained by graft copolymerizing styrene and acrylonitrile
Styrene terpolymer resin (ABS resin), methyl methacrylate-butadiene-styrene terpolymer resin (MBS resin) obtained by graft copolymerizing styrene and methyl methacrylate to butadiene homopolymer rubber or SBH, acrylic acid Acrylonitrile-acrylic ester-styrene ternary copolymer resin (JAS resin) obtained by graft copolymerizing 7-acrylonitrile and styrene onto ester-based rubber, and 7-acrylonitrile and styrene onto ethylene-propylene-based rubber. Graft copolymer resin (AES resin) obtained by graft copolymerization and acrylonitrile - chlorinated polyethylene - obtained by graft copolymerization of 7-acrylonitrile and styrene to chlorinated polyethylene.
Examples include styrene terpolymer resin (ACS resin).

In addition, typical examples of vinyl chloride polymers include vinyl chloride homopolymers and vinyl chloride in an amount of at most 50% by weight (
Preferably, a copolymer with another monomer (for example, vinylidene chloride) having a concentration of 30% by volume or less is used.

Other examples include ethylene-vinyl chloride copolymer resins obtained by grafting ethylene onto a vinyl chloride polymer, and graft copolymer resins obtained by graft polymerizing vinyl chloride onto the acrylic ester rubber.

The degree of polymerization of the vinyl chloride polymer is generally 800 to 40.
00, particularly preferably 800 to 3500.

Further, representative examples of styrene polymers include styrene homopolymers and copolymers of styrene and at most 30% by weight (preferably 25% by weight or less) of vinyl compounds. Representative examples of the vinyl compounds include:
Examples include acrylonitrile, methyl methacrylate, maleic acid, and maleimide.

In addition, low-melting point polyamide polymers include a cocondensation resin of adipic acid and hexamethylene diamine (nylon 6-6), a ring-opening polymer of ε-caprolactam (nylon 8), and an open-ring polymer of ε-7 minocaproic acid. Examples include polyether ester amide resins and polyether amide resins obtained by ring polymerization and derived from dicarboxylic acids having 4 to 20 carbon atoms. Among these polyamide resins, those having a ring and ball softening point of 80 to 210°C are preferred, and those having a viscosity of 190°C or less are particularly preferred.

Furthermore, methacrylate resin is called methacrylic resin, and is a resin whose main component is methyl methacrylate.

Furthermore, as vinylidene chloride resin, vinylidene chloride homopolymer and vinylidene chloride and a small amount (generally 30
Copolymers of vinyl compounds (for example, vinyl chloride, vinyl acetate, acrylonitrile, (meth)acrylic esters, acrylic esters, unsaturated ethers, and styrene) can be mentioned.

These thermoplastic resins are manufactured industrially and are used in a wide variety of fields, and their manufacturing method V:
Its properties and physical properties are widely known.

Among these thermoplastic resins, ethylene polymers are
It is preferable that the melt flow index (measured according to JIS K7210 under conditions 4, hereinafter referred to as "MFR(1)") is 1.0 to 50 g/10 minutes.
Particularly suitable is one weighing 2.0 to 30 g and 710 minutes.

In addition, propylene polymers have a melt flow index (measured according to JIS K7210 under 1 condition of 14, hereinafter referred to as rMFR(2)J) of 1.0 to 5.
0g/10 min is 9 most preferable, especially 2.0 to 30
g/lO is preferred.

Furthermore, for styrenic polymers and impact-resistant resins, those with a melt flow index (measured under conditions 8 according to JIS 7210, hereinafter referred to as rMFR(3)J) of 2.0 to 30 g 710 min. is preferable,
Particularly suitable is 3.0 to 20 g/10 minutes.

Among these thermoplastic resins, if a resin with a melt flow index below the lower limit is used, moldability will be poor, while if a resin with a melt flow index exceeding the upper limit is used, the resulting composition will have flexibility and a moderate It is not possible to obtain something with rigidity.

In addition, for vinyl chloride polymers, the average degree of polymerization is 600~
4000 is desirable, especially 800 to 3500
Preferably.

Furthermore, for vinylidene chloride resin, the average is 500
0 to 12000 (7) is preferable, especially 5ooo
~toooo is preferable.

In addition, methacrylate resin has an average degree of polymerization of 800
0 to 12,000 is preferable, especially 6,000 to
11000 is suitable.

If any of these thermoplastic resins has an average degree of polymerization below the 0 limit, the moldability will be good, but the mechanical properties, particularly the rigidity, will be poor. On the other hand, if a resin exceeding the L limit is used, moldability will be poor.

Furthermore, the polyamide resin preferably has a melt viscosity of 500 to 50,000 at a temperature of 280°C, particularly preferably 500 to 30,000. If a polyamide resin with a melt viscosity of less than 500 is used, moldability is good but rigidity is poor. On the other hand, if a polyamide resin exceeding 5000G is used, moldability is poor.

The composition of the present invention can be produced by uniformly mixing these chlorinated polyethylene, ethylene copolymer, and thermoplastic resin. However, the flexural strength, flexural modulus, and heat resistance of the composition can be improved by further blending an inorganic filler described below.

(D) Inorganic filler The inorganic filler is generally widely used in the fields of synthetic resins and rubber. These inorganic fillers are inorganic compounds that do not react with oxygen and water, and do not decompose during molding or cross-wiring. The inorganic fillers include metals such as aluminum, copper, iron, lead and nickel, these metals and magnesium,
Oxides of metals such as calcium, barium, zinc, zirconium, molybdenum, silicon, antimony, titanium, etc.
It is broadly classified into compounds such as its hydrate (hydroxide), sulfate, carbonate, and silicate, their double salts, and mixtures thereof. Typical examples of the inorganic fillers include the metals mentioned above, aluminum oxide (alumina), its hydrates, calcium hydroxide, magnesium oxide (magnesia), magnesium hydroxide, zinc oxide (zinc white), red lead, and iron. Lead oxides such as mortar, magnesium carbonate, calcium carbonate, basic magnesium carbonate, white carbon, asbestos, mica, talc, glass fiber, glass powder, glass peas, clay, diatomaceous earth, silica, wollastonite, iron oxide, antimony oxide, titanium oxide (titania),
Examples include lithopone, pumice powder, aluminum sulfate (such as gypsum), zirconium silicate, zirconium oxide, barium carbonate, dolomite, molybdenum disulfide, and iron sand.

Among these inorganic fillers, those in powder form have a diameter of 1
It is preferable that the intestinal volume is below (preferably 0.51 or below).
In the case of fibrous materials, the diameter is 1 to 500 microns (preferably 1 to 300 microns) and the length is 0.1 to 500 microns.
A 6 layer II (preferably 0.1 to 5 haze) is desirable, and a flat plate with a diameter of 2 layers or less (preferably 1 layer) is preferable.
mm or less) is preferable.

(E) Composition ratio The composition '+'1 of chlorinated polyethylene in one amount of metalwork of chlorinated polyethylene, ethylene copolymer and thermoplastic resin is 5 to 30% by weight, and 5 to 25% by weight.
is preferred, particularly 7 to 25% by weight. If the composition ratio of monomerized polyethylene in the total amount is less than 111% by weight, a composition with excellent vibration damping properties cannot be obtained.On the other hand, if it exceeds 30% by weight, a composition with excellent vibration damping properties cannot be obtained. Although f4t is available, its mechanical strength (rigidity, etc.) is inferior.

Further, the composition ratio of the ethylene copolymer in the total amount of the ethylene copolymer and the thermoplastic resin is 3 to 40% by weight, preferably 5 to 40% by weight, particularly 5 to 40% by weight.
35% by weight is preferred.

In producing the thermoplastic resin composition of the present invention, the above-mentioned effects can be exhibited by further incorporating the above-mentioned inorganic filler. This time, 1! The composition ratio of the inorganic filler to 100 parts by weight of the total amount of hydrogenated polyethylene, ethylene copolymer and thermoplastic resin is generally at most 50 parts by weight, preferably 1 to 50 parts by weight, particularly 5 to 40ffi711 parts. is suitable. If more than 50 parts by weight are added to the total amount of 100 parts by weight, the processability and fluidity of the resulting composition will be poor.

(F) Mixing method, molding method, etc.Although the composition of the present invention can be obtained by uniformly blending the above-mentioned substances, m elements commonly used in the rubber industry and plastic industry,
Stabilizers against light, ozone and heat, lubricants, colorants, organic peroxides (as crosslinkers), crosslinking accelerators, crosslinking accelerators, tackifiers, plasticizers, shirt releasers, softeners, slip agents, Additives such as flame retardants and antistatic agents may be added depending on the use of the composition.

To obtain the composition of the present invention, mixing methods commonly used in the rubber industry and plastics industry may be applied. Examples of the mixing method include tri-blending using a mixer such as a Henschel mixer, a kneader, and a Banbury mixer. , a method of melt-kneading using a mixer such as a roll mill or an extruder. When mixing, a more homogeneous mixture (M
L product) can be obtained.

The melt flow index (measured according to JIS K7210 under conditions 14, hereinafter referred to as rMFRJ) of the composition thus obtained is usually 1.0 to 30 g.
/10 minutes, preferably 2.0 to 25 g/10 minutes, particularly preferably 3.0 to 20 g/lCl.

The composition thus obtained is molded into a product having a desired shape by molding methods such as extrusion molding, injection molding, compression molding, transfer molding and stamp molding commonly practiced in the rubber and plastic industries. .

[Examples and comparative examples]

Hereinafter, the present invention will be explained in more detail with reference to Examples.

In addition, in Examples and Comparative Examples, the tensile strength) was measured using a Tensilon tester in accordance with ASTM 0-790. In addition, the bending strength and bending modulus are ASTM 0-678 and [)-790, respectively.
According to the above, A1 was constant using a Tensilon tester.

Furthermore, the Izot impact strength is ASTM D-25f3.
Measurements were made with a notch according to the following. In addition, the damping property test was conducted using a mechanical impedance measurement 411 (manufactured by NF Circuit Design Block Co., Ltd., model F-425), with an impedance of 50 to 100.
Noise generation was measured in A&.

In addition, each type of chlorinated polyethylene, ethylene copolymer, thermoplastic resin, inorganic filler, lubricant, stabilizer, and antioxidant used in the examples and comparative examples,
The physical properties are shown below.

[(8) 11! Chlorinated polyethylene] As 414 primed polyethylene, the density is 0.930g/
cm' polyethylene (average molecular F11 - approx. 1
0,000,000) obtained by chlorinating with an aqueous suspension (chlorine content: 33.0% by weight)
, immorality (hereinafter referred to as rCPEJ) was used.

[(B) Ethylene copolymer]

In addition, as an ethylene copolymer, MFR (+) is 10
Ethylene-methyl methacrylate which is 0g/10min
Anhydrous maleic terpolymer (methyl methacrylate-1,
The copolymerization ratio of maleic anhydride was 18.5 mol %, and the copolymerization ratio of maleic anhydride was 1.5 mol % (hereinafter referred to as rEMMAJ).

[(C) Thermoplastic +1 resin] Furthermore, as a thermoplastic resin, MFR (3) is 10g7
Acrylonitrile-butadiene-styrene ternary copolymer resin (styrene-butadiene copolymer rubber content i 15m41% or less rAdayS) which is 10 minutes,
A propylene homopolymer (hereinafter referred to as rPPJ) with an MFR (2) of 17 g/10 min, an MFR (3) of 1
Styrene homopolymer (hereinafter referred to as rPSJ) with a
), melting point is 189℃, and density is 1.0g
ω-aminoundecane condensation polymer (nylon 11) (hereinafter referred to as rPAJ) with a
Pv♀) was used.

[(D) Inorganic filler]

In addition, as an inorganic filler, calcium carbonate (f average particle size
1.71L*, hereinafter referred to as rcacO3J) and glass fiber #I (manufactured by Asahi Glass Co., Ltd., trade name Glassron Chip Strand, average length 6 mm, diameter 5 to 8 denier, hereinafter referred to as rcr). Ta.

[(E) Stabilizers, etc.]

As a stabilizer, tribasic lead sulfate (average particle size 2.0p layer)
was used, and magnesium stearate was used as a lubricant. In addition, high molecular weight hindered polyhydric phenol and dilaurylthiopropionate are used as antioxidants,
As a coloring agent, Furnace Black (manufactured by Showa Gear Pot Co., Ltd., trade name: Show Black To 330, average particle size: 4O) was used as a coloring agent.
n intestine, HAF) was used. Furthermore, a hydrazine conductor was used as a copper damage inhibitor.

Examples 1-18, Comparative Examples 1-8 Chlorinated polyethylene (CPE), ethylene-based co-heptamine (
ENMA), thermoplastic resin and inorganic filler and 2 parts of tribasic lead sulfate, 0.2 type seedling part of magnesium stearate, 0, 3 tons (1j: part of item 7!
- Correct hindered polyhydric phenol, 0.3 parts by weight of dilaurylthiopropionate, 2.0? , Gtl kneader mixer for 20 minutes. A sheet was manufactured from each of the obtained mixtures using an oven roll previously set at 120°C. In this way, each sheet was cut into three-layer square pellets using a sheet cutter. Some of the pellets produced in this way were heated to a temperature of 230°C. Using a press machine, the pressure is 200 kg/c rn
” (gauge pressure) for 5 minutes to obtain a thickness of 2.
A sheet of Pengshi was made and used as a sample for measuring vibration damping properties.

In addition, using an injection molding machine, the temperatures of cylinders 1, 2 and 3 and the nozzle were set at 220°C, and the inside of the mold was maintained at 23°C, and the tensile strength, elongation, and bending strength were determined.

Samples were prepared for measuring flexural modulus and Izot impact strength. The tensile strength, elongation, flexural strength 1 flexural modulus and Izod impact strength of each sample were measured, and the MFH of the pellets was measured. These are shown in Table 2. Furthermore, Table 3 shows the results of measuring nozzle generation under the conditions whose frequencies are shown in Table 3.

(The following is a blank space) In Comparative Example 8, dehydrochlorination was generated during kneading.

〔Effect of the invention〕

The thermoplastic resin composition obtained by the present invention solves the disadvantage of conventional vibration-damping sheet materials, in which metal laminates were the mainstream, which required time and effort during processing, and is low-cost. Moreover, it is not only easy to manufacture, but also exhibits the following effects (features).

(1) Excellent weatherability.

(2) Good dimensional stability.

(3) Excellent heat resistance.

(4) Good moldability and low shrinkage during molding.

(5) Excellent impact resistance at relatively low temperatures (for example, -20°C).

(6) Since no thermosetting resin is used, no heat treatment step is required, and no strict reaction control is required.

(7) It is lightweight.

(8) Noise is reduced in the range (400 to 500 H) where the most noise (vibration) occurs in automobiles and the like.

The thermal IIf plastic resin composition obtained by the present invention is as follows.
- It can be used as a vibration damping material in a wide range of fields because it exhibits the following effects. Typical uses include automobiles, railways, aircraft, 1 (vehicles and other means of transportation,
House'W! It is promising for reducing the noise of noise-generating materials such as product parts (for example, various motors), parts of electronic equipment, and other industrial parts.

Claims (1)

[Scope of Claims] (A) Chlorinated polyethylene, (B) an ethylene copolymer of at least ethylene and an α,β-unsaturated dicarboxylic acid or its anhydride, and (C) a thermoplastic resin that melts at 200°C. The composition ratio of the chlorinated polyethylene in the total amount of these is 5 to 30% by weight, and the composition ratio of the ethylene copolymer in the total amount of the ethylene copolymer and the thermoplastic resin. is 3 to 40% by weight of a thermoplastic resin composition.