JPH07138419A - Flame-retardant resin composition - Google Patents

Abstract

PURPOSE:To obtain a resin composition containing an ethylene-alpha,beta-unsaturated carboxylic acid copolymer, a specific olefinic polymer, an inorganic flame retardant and red phosphorus, capable of retaining mechanical strength, flexibility, high abrasion resistance and high flame retardancy and excellent in processability. CONSTITUTION:This resin composition is obtained by blending 100 pts.wt. of total amount of (A) 50-99.5wt.% of an ethylene-alpha,beta-unsaturated carboxylic acid copolymer and (B) 50-0.5wt.% of an olefinic polymer selected from (i) a modified olefinic polymer modified with an acid anhydride-containing compound and containing the compound in a 0.001-10wt.% concentration, (ii) an olefinic polymer containing an unsaturated silane compound in a 0.001-10wt.% concentration, (iii) a modified olefinic polymer modified with an alkenyl cyclic iminoether- containing compound and containing the compound in a 0.001-10wt.% concentration and (iv) an olefinic polymer containing an epoxy-containing compound in a 0.001-10wt. concentration with (C) 30-150 pts.wt. of an inorganic flame retardant and (D) 0.1-10 pts.wt. of red phosphorus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant resin composition, and more specifically, ethylene / α, β-carboxylic acid copolymer (A) and modified olefin polymer (B). , Inorganic flame retardant (C) and red phosphorus (D) as essential components, excellent in flexibility, mechanical properties, chemical resistance, etc., no toxic gas such as halogen gas is generated during combustion, high difficulty The present invention relates to a flammable olefin resin composition.

[0002]

2. Description of the Related Art Polyolefin resins are excellent in physical properties and chemical properties, so that they can be used in various molding methods such as extrusion molding and injection molding to form films, sheets, pipes, containers,
It is the most demanded general-purpose resin that is molded into electric wires and cables and used for many purposes for household and industrial uses. However, since polyolefin resins are flammable, various methods for making them flame-retardant have been conventionally proposed. The most general method is to add a halogen-based or phosphorus-based organic flame retardant to a polyolefin resin to make it flame-retardant. However, although these flame retardants are effective with a small amount of compounding, they have the drawback of generating harmful gas during combustion.

Recently, hydrates of inorganic metal compounds such as aluminum hydroxide and magnesium hydroxide are often effective as a pollution-free flame retardant which emits no harmful gas during combustion, has a low smoke property, and is a pollution-free type. Known (Japanese Patent Laid-Open No. 2-5
3845, Japanese Patent Laid-Open No. 2-145632). The present inventors have previously proposed a polyolefin resin composition having high flame retardancy, which is obtained by adding an inorganic flame retardant and red phosphorus to an ethylene vinyl ester copolymer (JP-A-2-53845).
In the polyolefin resin composition using these inorganic flame retardants, increasing the filling amount of the inorganic flame retardant in order to enhance the flame retardancy lowers the mechanical strength, flexibility and processability. Not only that, but it also has the drawback that the wear resistance is significantly reduced. Nowadays, housing members,
There is a strong demand for flame-retardant olefin resin compositions that are halogen-free, highly flame-retardant, and have excellent mechanical properties, flexibility, and processability for applications such as electrical and electronic parts, flooring, electric wires, and cables. There is.

[0004]

DISCLOSURE OF THE INVENTION The present invention satisfies the above-mentioned requirements and retains mechanical strength, flexibility, workability, wear resistance, high flame retardancy and the like and is excellent in workability. The present invention provides a flammable olefin resin composition, which includes a housing member, electric / electronic parts, film, sheet, container, electric wire,
It is used for molding cables, packing, sealants, hoses, injection products, etc.

[0005]

Means for Solving the Problems In view of the above points, the inventors of the present invention have conducted extensive studies, and as a result, as a result, an ethylene / α, β-carboxylic acid copolymer (A) and a modified olefin polymer ( It has been found that the above problems can be solved by adding a specific amount of an inorganic flame retardant (C) and red phosphorus (D) as an essential component to an olefin resin having a specific mixing ratio of B). Invented the invention.

That is, the present invention provides the following (A) to (D):
The present invention provides a resin composition containing the above component. (A) Ethylene / α, β-unsaturated carboxylic acid copolymer
50-99.5% by weight (B) Polymer mainly composed of at least one olefin selected from the following (B1) to (B4)
50-0.5% by weight (B1) An olefin polymer modified with a compound having an acid anhydride group, wherein the concentration of the compound having an acid anhydride group is 0.001-10 in 100% by weight of the component (B1). (B2) Olefin-based polymer containing an unsaturated silane compound, wherein the concentration of the unsaturated silane compound is 0.001 to 10% by weight based on 100% by weight of the component (B2). Polymer (B3) Olefin-based polymer modified with a compound having an alkenyl cyclic imino ether group, wherein the concentration of the compound having an alkenyl cyclic imino ether group is 0.001 to 10% by weight based on 100% by weight of the component (B3). The olefin polymer (B4) is an olefin polymer containing a compound having an epoxy group, and the concentration of the compound having an epoxy group is (B4)
4) Olefin-based polymer which is 0.001 to 10% by weight in 100% by weight of the component (C) Inorganic flame retardant 30 to 150 parts by weight (D) Red based on 100 parts by weight of the total of the above components A and B Phosphorus 0.1 to 10 parts by weight Hereinafter, the present invention will be described in detail.

In the present invention, ethylene (A) component
The α, β-unsaturated carboxylic acid copolymer is a copolymer of ethylene mainly composed of ethylene and α, β-unsaturated carboxylic acid, and in addition to the binary copolymer, ethylene, α, β
A terpolymer consisting of an unsaturated carboxylic acid and an α, β-unsaturated carboxylic acid ester, a binary copolymer using ethylene and a monomer having a partially saponified molecule in its molecule such as a maleic acid monoester. It includes a polymer and a terpolymer. Specifically, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylic acid copolymer, ethylene-maleic acid copolymer, ethylene-acrylic acid-methacrylic acid copolymer,
Ethylene-acrylic acid-ethyl methacrylate copolymer,
Examples thereof include ethylene-monoethyl maleate copolymer.

In the present invention, the amount of the α, β-unsaturated carboxylic acid in the component (A) is 5 to 40 mo in the total amount of the component (A).
1%, preferably 7 to 15 mol%. If the amount of α, β-unsaturated carboxylic acid is less than 5 mol%, sufficient strength against abrasion cannot be obtained, and if it is more than 40 mol%, workability is deteriorated, which is not preferable.

The component (B) of the present invention is (B1) an olefin polymer modified with a compound having an acid anhydride group, (B)
2) selected from an olefin polymer containing an unsaturated silane compound, (B3) an olefin polymer modified with a compound having an alkenyl cyclic iminoether group, and (B4) an olefin polymer containing a compound having an epoxy group. At least one. In the component (B), the olefin polymer is a homopolymer or copolymer of a compound having one ethylenically unsaturated double bond composed of carbon and hydrogen, and a polymer containing a small amount of a diene or a triene. Is.

In the olefin polymer (B1), the acid anhydride group means a group in which at least two carboxylic acid groups in the molecule are condensed by losing one molecule of water. The compound having an acid anhydride group needs to have a double bond in the molecule in order to modify the olefin polymer to obtain the olefin polymer (B1). Specific examples of the compound having such an acid anhydride group include anhydrides of α, β-unsaturated dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid and itaconic acid.

The olefin-based polymer (B1) is a polymer obtained by modifying the olefin-based polymer with a compound having an acid anhydride group, and the modification is a radical generator in the presence or absence of a solvent. Is used to react the compound having an acid anhydride group with the olefin polymer. The amount of the compound having an acid anhydride group in the olefin polymer (B1) is 100% by weight of the component (B1),
0.001 to 10% by weight, preferably 0.05 to 5% by weight is good. The amount of the compound having an acid anhydride group is 0.001
When it is less than 10% by weight, mechanical properties such as tensile strength are deteriorated, and when it is more than 10% by weight, the modified base olefin polymer causes excessive cross-linking or decomposition to deteriorate moldability.

In the olefin polymer (B2) containing an unsaturated silane compound, the unsaturated silane compound is
It is a silane compound having an ethylene-based double bond, and specific examples thereof include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetylsilane, and vinyltrichlorosilane.

The olefin polymer (B2) containing an unsaturated silane compound is a polymer obtained by modifying an olefin polymer with an unsaturated silane compound, or a copolymer obtained by copolymerizing an olefin and an unsaturated silane compound. Includes. The modification herein means to react the unsaturated silane compound with the olefin polymer using a radical generator in the presence or absence of a solvent as described above. The addition amount or copolymerization amount of the unsaturated silane compound in the olefin polymer (B2) is 10
In 0% by weight, 0.001 to 10% by weight, preferably 0.05 to 5% by weight is good. If the amount of the unsaturated silane compound is less than 0.001% by weight, mechanical properties such as tensile strength are poor, and the flame retardancy is not sufficiently improved.
If it is larger, moldability is deteriorated, which is not preferable.

In the olefin polymer (B3) modified with a compound having an alkenyl cyclic imino ether group, the compound having an alkenyl cyclic imino ether group is a compound represented by the following structural formula (Formula 1).

[0015]

[Chemical 1]

[Where n is 1, 2 and 3, preferably 2 and 3, and more preferably 2]. Also R ¹ , R
² , R ³ and R each represent a C1 to C12 inactive alkyl group and / or hydrogen, and the alkyl group may have an inactive substituent.] Inert as used herein means a graft reaction or It means that the function of the product is not adversely affected. Also, all R need not be the same. Preferably R ¹ = R ² = H, R ³ = H or M
e, R = H, ie 2-vinyl and / or 2-isopropenyl-2-oxazoline, 2-vinyl and / or 2-isopropenyl-5,6-dihydro-4H-
It is 1,3-oxazine. These may be used alone or as a mixture. Among these, 2-vinyl and / or 2-isopropenyl-2-oxazoline are particularly preferable.

In the olefin polymer (B3), the modification means that the compound having an alkenyl cyclic imino ether group is reacted with the olefin polymer in the presence or absence of a solvent using a radical generator as described above. It means to let. The amount of the compound having an alkenyl cyclic iminoether group in the olefin polymer (B3) was 0.
001 to 10% by weight, preferably 0.05 to 5% by weight. If the amount of the compound having an alkenyl cyclic iminoether group is less than 0.001% by weight, mechanical properties such as tensile strength are poor and flame retardancy is not sufficiently improved.
If it exceeds 5% by weight, moldability is deteriorated, which is not preferable.

In the olefin polymer (B4) containing a compound having an epoxy group, the compound having an epoxy group is a compound having an ethylenically unsaturated double bond and having two oxygen atoms adjacent to each other in the molecule. It is a compound having a portion bonded to an atom, and also includes a compound in which glycid, glycidic acid is bonded to an unsaturated carboxylic acid, vinyl alcohol or the like. Specific examples of the compound having an epoxy group, glycidyl acrylate, glycidyl methacrylate, itaconic acid monoglycidyl ester, butene tricarboxylic acid monoglycidyl ester, butene tricarboxylic acid diglycidyl ester, butene tricarboxylic acid triglycidyl ester and α-chloroallyl, Glycidyl esters such as maleic acid, crotonic acid and fumaric acid, or vinyl glycidyl ether, allyl glycidyl ether, glycidyl oxyethyl vinyl ether, styrene-p-
Glycidyl ethers such as glycidyl ether, p-
Examples thereof include glycidyl styrene. Glycidyl methacrylate and allyl glycidyl ether are particularly preferable.

The olefin polymer (B4) containing a compound having an epoxy group is a copolymer obtained by copolymerizing an olefin and a compound having an epoxy group, and the above olefin polymer is a compound having an epoxy group. Includes modified polymers. In the olefin polymer (B4), the modification means that an unsaturated silane compound is reacted with the olefin polymer in the presence or absence of a solvent using a radical generator as described above.
The amount of the compound having an epoxy group in the olefin polymer (B4) is 0.001 to 30% by weight, preferably 0.0
1 to 15% by weight, more preferably 0.05 to 8% by weight
Is good. When the amount of the compound having an epoxy group is less than 0.001% by weight, mechanical properties such as tensile strength are poor, and the flame retardancy is not sufficiently improved, and when it is more than 10% by weight, moldability is deteriorated, which is preferable. Absent.

The blending ratio of the ethylene / α, β-unsaturated carboxylic acid copolymer of the component (A) and the polymer of the component (B) is 50 to 99.5% by weight of the component (A), and (B). Ingredient 0.
It is used in an amount of 5 to 50% by weight, preferably 80 to 99% by weight of the component (A) and 1 to 20% by weight of the component (B).
When the blending ratio of the component (A) is 50% by weight or less and the blending ratio of the component (B) is 50% by weight or more, flame retardancy is not sufficiently improved, and the blending ratio of the component (A) is 99.5% by weight. When it is at least%, it is difficult to uniformly mix the component (B).

Examples of the inorganic flame retardant (C) used in the present invention include aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, basic magnesium carbonate, dolomite, hydrotalcite, calcium hydroxide, barium hydroxide. , A hydrate of tin oxide, a hydrate of an inorganic metal compound such as borax, zinc borate, zinc metaborate, barium metaborate, zinc carbonate, magnesium-calcium carbonate, calcium carbonate and the like. Among the above, at least one metal compound selected from the group consisting of aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, basic magnesium carbonate, dolomite and hydrotalcite, particularly aluminum hydroxide, zinc borate and Magnesium hydroxide has an excellent flame retardant effect and is economically advantageous. The above flame retardants may be used alone or in combination of two or more.
These inorganic flame retardants (C) component are (A) component and (B)
30 to 150 parts by weight based on 100 parts by weight of the total components,
It is preferably used in the range of 50 to 150 parts by weight.
When the blending ratio of the component (C) is 30 parts by weight or less, the flame retardant effect becomes insufficient, and when it is 150 parts by weight or more, not only the mechanical strength, flexibility and workability are deteriorated, but also the wear resistance is remarkably It is not preferable because it decreases.

In the present invention, a flame-retardant resin composition having a higher degree of flame retardancy can be provided by further adding a red phosphorus (D) component. As the red phosphorus which is the component (D) of the present invention, it is preferable to use red phosphorus coated with an organic and / or inorganic compound.

Red phosphorus coated with an organic and / or inorganic compound means that the surface of red phosphorus particles is coated with a thermosetting resin such as epoxy resin, phenol resin, polyester resin, silicone resin, polyamide resin or acrylic resin. Those coated with aluminum hydroxide, zinc, magnesium, etc., and further coated with the thermosetting resin, metal phosphide and then coated with a thermosetting resin, titanium,
Examples include modified red phosphorus such as those coated with a metal complex hydrated oxide such as cobalt or zirconium.

The red phosphorus preferably has an average particle size of 5 to 30 μm, and the content of the particles having a particle size of 1 μm or less and 100 μm or more is 5% by weight or less. In the case of complex hydrated oxides such as titanium-cobalt type, Ti + C per total weight of red phosphorus particles
The metal component such as o is preferably 0.5 to 15% by weight, and the organic resin is preferably 0.1 to 20% by weight based on the total weight.

These modified red phosphorus are excellent in heat resistance stability and hydrolysis resistance, and the hydrolysis reaction in the presence of water or at high temperature is almost completely suppressed. Does not occur.

The red phosphorus as the component (D) used in the present invention is 0.01 to 10 parts by weight, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the total of the components (A) and (B). Used in the range of. The amount of red phosphorus as component (D) is 0.0
If it is less than 1 part by weight, the effect of addition is not obtained, and if it exceeds 10 parts by weight, unnecessary coloring occurs, which is not preferable.

The flame-retardant resin composition of the present invention may further contain, as the component (E), a metal hydroxide other than the component (D) or a metal oxide which is not usually used as a flame retardant. it can. Specific examples of the metal hydroxide as the component (E) include lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide and nickel hydroxide. Examples of the metal oxide as the component (E) include sodium oxide, calcium oxide, magnesium oxide, manganese oxide, zinc oxide, copper oxide, iron oxide, nickel oxide, tin oxide, and aluminum oxide. In the present invention, the compounding amount of the component (E) is 3 with respect to 100 parts by weight of the total of the components (A) and (B).
Within 0 parts by weight, total 20 with inorganic flame retardant (C) component
Within the range of 0 parts by weight, preferably 150 parts by weight.

In the present invention, it is possible to use a filler to impart various properties. Examples of the filler include powder, granules, tabular, acicular, spherical or hollow substances and fibrous substances, and specifically, calcium carbonate, magnesium carbonate, calcium sulfate, calcium silicate, clay, diatomaceous earth. , Talc, alumina, silica sand, glass powder, iron oxide, metallic iron, antimony trioxide, graphite, silicon carbide, silicon nitride, silica, boron nitride, aluminum nitride, carbon black, and other granular fillers; mica, glass Plates, sericite, pyrophyllite, metal foils such as aluminum flakes, flat or scale-like fillers such as graphite; hollow fillers such as shirasu balloons and pumice stones; glass fibers, carbon fibers, graphite fibers, whiskers, metals Examples thereof include fibers, silicon carbide fibers, asbestos, and mineral fibers such as wollastonite.

When using these fillers, in consideration of the physical properties of the composition, the amount of the component (A) and the component (B) together with the component (C) and the component (E) is 200 parts by weight per 100 parts by weight. It is preferable to use less than or equal to parts by weight.

In addition to the above, organic fillers, antioxidants, lubricants, organic or inorganic pigments, UV inhibitors, light stabilizers, dispersants, and copper damage inhibitors may be added as necessary without departing from the scope of the present invention. , A neutralizing agent, a plasticizer, a nucleating agent, a pigment and the like may be added.

The flame-retardant resin composition of the present invention may be doy-blended with a conventional tumbler or the like, or may be a conventional kneading machine such as a Banbury mixer, a pressure kneader, a kneading extruder, a twin-screw extruder or a roll. It can be obtained by melt-kneading using a machine and uniformly dispersing it into pellets. To give a specific example of the production, first, an inorganic flame retardant (C) and red phosphorus (D) are used. If desired, dry-blend a predetermined amount of component (A) and component (B) with an inorganic filler, etc., and then melt with a normal kneader such as a Banbury mixer, a pressure kneader, a kneading extruder, a twin-screw extruder, or a roll. After kneading and pelletizing, there is a method of forming a resin molded product.

[0032]

EXAMPLES Hereinafter, the contents of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these contents. Component (A) ethylene / α, β-unsaturated carboxylic acid copolymer: Ethylene-acrylic acid copolymer (abbreviated as EAA)
[AA content = 15% by weight, MFR = 0.75 g / 10
min, density 0.933] 2. Ethylene-acrylic acid copolymer (abbreviated as EAA-2) [AA content = 10% by weight, MFR = 0.65 g /
10 min, density 0.938] 3. Ethylene-methacrylic acid copolymer (abbreviated as EMAA) [MAA content = 15% by weight, MFR = 1.5 g /
10 minutes, density 0.938]

Polymer of component (B) 4. Maleic anhydride-modified ethylene-butene 1 copolymer (abbreviated as MAn-LL) [maleic acid content 0.4% by weight, MFR = 0.3 g / 10 min, density 0.920];
(B1) 5. Silane-modified polyethylene (abbreviated as unsaturated silane);
(B2) Olefin resin [trade name; Nisseki Linirex AF12
10 Nippon Petrochemical Co., Ltd .; MFR = 0.8; Density 0.920] 100 parts by weight benzoyl peroxide 0.3 parts by weight, vinyltrimethoxysilane 1.5 parts by weight, antioxidant tetrakis [methylene- ( 3,5-di-
t-Butyl-4-hydroxylphenyl) -propionate] 0.2 parts by weight of methane was dry blended, reacted at 210 ° C. using a Banbury mixer, and then pelletized. Silane-modified polyethylene is M
FR = 2.1 g / 10 minutes, and the content of vinyltrimethoxysilane was 1.2% by weight. 6. Alkenyl-modified polyethylene (abbreviated as alkenyl); (B3) Olefin resin [trade name; Nisseki Linirex AF12
10 Nippon Petrochemical Co., Ltd .; MFR = 0.8; density 0.920] 100 parts by weight of dicumyl peroxide 0.5 part by weight, 2-vinyl-2-oxazoline 2.0 parts by weight, antioxidant tetrakis [Methylene- (3,5-di-t-butyl-4-hydroxylphenyl) -propionate] 0.2 parts by weight of methane was dry blended and then reacted at 210 ° C. using a Banbury mixer, and then pelletized. I was there. The physical properties of alkenyl-modified polyethylene are MFR = 2.9 g / 10 min, 2-vinyl-
The content of 2-oxazoline was 1.8% by weight. 7. Ethylene-glycidyl methacrylate copolymer (abbreviated as E-GMA) [GMA content 5% by weight MFR =
1 g / 10 min Density 0.928]; (B4)

Inorganic flame retardant of component (C): Magnesium hydroxide [Mg (OH) ₂ , trade name; Kisuma 5B, manufactured by Kyowa Chemical Co., Ltd.] Aluminum hydroxide [A1 (OH) ₃ ]

Component (D): Red phosphorus [trade name; HISHIGARD NP-10 manufactured by Nippon Kagaku Kogyo Co., Ltd.]

Component (E): ZnO, MgO, NaOH

(Examples 1 to 30) EA as component (A)
A or EAA-2 was used, and MAn was used as the component (B).
-LL (B1) or E-GMA (B4)
Using Mg (OH) ₂ or Al (OH) ₃ as the component (C), and using red phosphorus as the component (D), the components (A) to (D) were mixed at the compounding ratios shown in Tables 1 to 3. Each was dry-blended with a predetermined amount and kneaded with a 50 mmΦ extruder to form pellets. The pelletized flame-retardant resin composition of the present invention was formed into a sheet having a predetermined thickness by pressing. MF
Tables 1 to 3 also show the results of tests of oxygen index and wear resistance such as R and tensile strength and elongation.

Comparative Examples 1 to 10 EA as component (A)
A or EAA-2 was used, and MAn was used as the component (B).
-LL (B1) or E-GMA (B4)
Using Mg (OH) ₂ or Al (OH) ₃ as the component (C), and using red phosphorus as the component (D), the components (A) to (D) were respectively mixed at the compounding ratios shown in Table 3. The mixture was quantitatively dry blended, kneaded with a 50 mmΦ extruder and pelletized. In the same manner as in Example 1, the oxygen index and abrasion resistance such as MFR and tensile strength / elongation were tested. The results are also shown in Table 3.

[0039]

[Table 1]

[0040]

[Table 2]

[0041]

[Table 3]

(Examples 31 to 42) E as the component (A)
Using AA or EMAA, MAn as the component (B)
-LL (B1) or silane-modified polyethylene (B
2) (Unsaturated silane) or alkenyl-modified polyethylene (B3) (abbreviated as alkenyl) or E-
Using GMA (B4), Mg (OH) as the component (C)
₂ and Al (OH) ₃ and red phosphorus as the component (D) were used to dry-blend each of the components (A) to (D) in predetermined proportions at the blending ratios shown in Table 4, and use a 50 mmΦ extruder. Kneaded and pelletized. MF as in Example 1
The oxygen index and abrasion resistance such as R and tensile strength / elongation were tested.
The results are also shown in Table 4.

[0043]

[Table 4]

(Examples 43 to 47) E as the component (A)
AA is used, MAn-LL (B1) is used as the component (B), Mg (OH) ₂ is used as the component (C), and (D)
Using red phosphorus as a component and ZnO, MgO, or NaOH as a component (E), components (A) to (E) were dry-blended in predetermined proportions at the blending ratios shown in Table 5, and then a 50 mmΦ extruder was used. Kneaded and pelletized. In the same manner as in Example 1, the oxygen index and abrasion resistance such as MFR and tensile strength / elongation were tested. The results are also shown in Table 5.

(Comparative Examples 11 to 18) Ethylene ethyl acrylate resin as the component (A) [trade name; Nisseki Lexlon EEA A2050 manufactured by Nippon Petrochemical Co., Ltd .; M
FR = 1.0; EA content 5% by weight] (abbreviated as EEA) or ethylene / vinyl acetate resin [trade name; Nisseki Lexron V260 manufactured by Nippon Petrochemical Co., Ltd .; M
FR = 1.0; VA content 10] (abbreviated as EVA) or low-density polyethylene [trade name; Nisseki Lexron
W2000 manufactured by Nippon Petrochemical Co., Ltd .; MFR = 1.
0; density 0.920] (abbreviated as LDPE),
MAn-LL (B1) is used as the component (B), and (C) is used.
Using Mg (OH) ₂ and Al (OH) ₃ as components,
(D) component red phosphorus is used, and (E) component is M
Using gO, the component (A) at the compounding ratio shown in Table 5
A predetermined amount of the component (D) or further the component (E) was dry-blended, kneaded with a 50 mmΦ extruder and pelletized. In the same manner as in Example 1, MFR, tensile strength and elongation,
Oxygen index and abrasion resistance were tested. The results are also shown in Table 5.

[0046]

[Table 5]

(Test method) (1) Tensile test (YTS),
(UTS) and elongation (UEL) (%) A test piece punched with a No. 3 dumbbell from a sheet having a thickness of 1 mm was measured at a pulling speed of 200 mm / min. Using a Tensilon. (2) Oxygen index (LOI) The oxygen index was measured according to JIS K7201. (3) Abrasion resistance With a traverse type abrasion tester, broad cloth was used as a friction cloth. Load 0.1kgf / cm ² , stroke 10
The test was performed at 0 mm, a friction cloth speed of 30 reciprocations / minute, and 2000 reciprocations. The result of the abrasion test was visually evaluated as ◯ (◯: excellent in abrasion resistance. ×: poor in abrasion resistance and impractical).

[0048]

The flame-retardant resin composition of the present invention is a resin comprising a component (A) ethylene / α, β-unsaturated carboxylic acid copolymer and a component (B) mainly olefin polymer. Since the interaction between the component and the inorganic flame retardant (C) component is strong and the red phosphorus of the component (D) is blended, dripping does not occur at the time of combustion, and processability, flexibility, and mechanical properties Characteristics, chemical resistance, etc. are dramatically improved, and not only does it maintain a halogen-free, pollution-free, high-level flame retardancy with no safety problems, but it also has excellent wear resistance. The flame-retardant resin composition of the present invention having such excellent properties is a vehicle such as an automobile, a train or a bus, a ship, an aircraft, a general house,
Various types of power plants such as Atomic Energy Research Institute that regulates the amount of corrosive gas, plants for chemicals, steel, petroleum, etc., and advanced flame retardancy in the fields of textiles, electricity, electronics, construction, civil engineering, etc. It can be used for applications such as housing members used in places where mechanical properties are required, electric / electronic parts, flooring materials, electric wires, cables, etc.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area C08L 23:26)

Claims (1)

[Claims] 1. A resin composition containing the following components (A) to (D). (A) Ethylene / α, β-unsaturated carboxylic acid copolymer
50-99.5% by weight (B) Polymer mainly composed of at least one olefin selected from the following (B1) to (B4)
50-0.5% by weight (B1) An olefin polymer modified with a compound having an acid anhydride group, wherein the concentration of the compound having an acid anhydride group is 0.001-10 in 100% by weight of the component (B1). (B2) Olefin-based polymer containing an unsaturated silane compound, wherein the concentration of the unsaturated silane compound is 0.001 to 10% by weight based on 100% by weight of the component (B2). Polymer (B3) Olefin-based polymer modified with a compound having an alkenyl cyclic imino ether group, wherein the concentration of the compound having an alkenyl cyclic imino ether group is 0.001 to 10% by weight based on 100% by weight of the component (B3). The olefin polymer (B4) is an olefin polymer containing a compound having an epoxy group, and the concentration of the compound having an epoxy group is (B4)
4) Olefin-based polymer which is 0.001 to 10% by weight in 100% by weight of the component (C) Inorganic flame retardant 30 to 150 parts by weight (D) Red based on 100 parts by weight of the total of the above components A and B Phosphorus 0.1 to 10 parts by weight