JPH01278546A - Flame-retardant polypropylene resin composition - Google Patents

Abstract

PURPOSE:To provide the title composition outstanding in flame retardancy, free from generating corrosive gases and/or toxic gases when processed or burned, comprising a PE resin, ammonium polyphosphate etc., a triazine derivative, a specific thiophosphite and a PP resin in specified proportion. CONSTITUTION:The objective composition comprising (A) 5-30wt.% of a PP resin, (B) 12-25wt.% of ammonium polyphosphate or polyphosphoramide, (C) 5-10wt.% of a 1,3,5-triazine derivative of formula I (X is morphorino or piperizino; Y is divalent group of piperazine; n is 2-50), (D) 1-15wt.% of a crosslinking and, (E) 0.05-5wt.% of a thiophosphite selected from those of respective formula II-V [R1 is >=6C alkyl, cycloalkyl or aryl; R2 is -SR'2 or -R'2; R3 is -SR'3 or -R'3; R'2 and R'3 are each >=6C alkyl, cycloalkyl or aryl; X is -(CH2)n-, -(CH2)n-O-(CH2)m-, etc.; n and m are each 2-6], and (F) the rest of a PP resin.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a flame-retardant polypropylene resin composition. More specifically, it is mainly composed of polypropylene resin, does not generate corrosive or toxic gases, has little deterioration in molding processability or mechanical strength of the molded product, and has a high degree of The present invention relates to a flame-retardant polypropylene resin composition from which a molded article having flame-retardant properties can be obtained.

Conventionally, polypropylene resin has excellent processability, chemical resistance,
Minutes for household electrical products due to its weather resistance, electrical properties, and mechanical strength! i! It is widely used in various fields including f, buildings, interior decoration, and automobile parts.

(Prior art) Polypropylene resin is originally a resin that easily burns, but as the applications for which it is used expand, polypropylene resin is also required to have performance as a flame retardant material, and the performance requirements are becoming stricter year by year. There is. Various flame-retardant polypropylene resin compositions have been proposed to meet these demands.

For example, JP-A-53-92855, JP-A-4-54-29350, JP-A-54-7765, JP-A-56-26954, JP-A-57-874.
As disclosed in Japanese Patent Publication No. 62 and Japanese Patent Application Laid-open No. 110738/1984, hydrous inorganic compounds (for example, magnesium hydroxide, aluminum hydroxide, barium sulfate, magnesium oxide, antimony oxide, hydrotalcite, etc.) are added to polypropylene. Compositions added to the resin, such as polyethylene with a melt index of 0.01 to 20 and decabromo diphenyl ether (or dotecachlorododehydromethanodibenzocyclooctene) and powder as disclosed in Japanese Patent Publication No. 55-30739. talc, kaolinite, sericite, silica,
Composition in which one or more inorganic fillers selected from diatomaceous earth are added to polypropylene resin, JP-A-59-14705
As disclosed in Publication No. 0, ammonium phosphate (
or phosphoric acid amide) and],,, 3.5-)
Compositions in which riazine derivative oligomers (moshikke polymers) are added to polypropylene resin have been proposed.

However, in a composition in which a hydrous inorganic compound is added to a polypropylene resin, for example, a composition in which magnesium hydroxide is added, it is necessary to add a large amount of the hydrous inorganic compound in order to impart a high degree of flame retardance. As a result, the composition causes a decrease in moldability and a decrease in the mechanical strength of the molded article.

In addition, compositions containing halogen compounds have relatively little reduction in molding processability or mechanical strength of molded products, and molded products with a high degree of flame retardancy can be obtained. Disadvantages include the generation of corrosive scum and toxic gases during processing and combustion.

However, the flame-retardant polypropylene resin composition disclosed in JP-A No. 59-147050 has relatively little reduction in molding processability or mechanical strength of the molded product. Corrosive and toxic gases are rarely generated during processing or combustion.

However, the composition is UL Subject 94 (Unterliter Laboratories, Inc.)
In a test based on the vertical combustion test (hereinafter referred to as UL94 combustion test) of 1-Flammation test of plastic materials for equipment parts, the flammability rank was V-O with a wall thickness of 1/8 inch.
However, in the 5■ test, which requires an even higher degree of flame retardancy, the dripping of liquid droplets and the falling of burning pieces due to melting (hereinafter, these drippings and falling objects are referred to as drips, and the properties that cause drips are Because of this, it is difficult to achieve a flame retardancy of 5V with a 1/8 inch wall thickness, which is a high degree of flame retardancy. Unfortunately, even if ethylene-based synthetic rubber or elastomer, which is usually used to improve the impact strength of polypropylene, is added to the composition, there is almost no effect of improving impact properties such as Izot impact strength.

(Problem to be Solved by the Invention) The present inventors have discovered that the present inventors have a high degree of flame retardancy, that is, a flame retardance of 5V at 1/8 inch wall thickness in the UL94 combustion test, and that they do not contain corrosive gases during processing or combustion. A molded door that does not emit gas or toxic gas] A flame retardant that allows molded products with excellent impact resistance to be obtained with less deterioration in properties and mechanical strength of the molded product when made into a molded product. We conducted extensive research in order to obtain a polypropylene resin composition. As a result, polypropylene resin, polyethylene resin, polyethylene resin, ethylene synthetic rubber or elastomer, ammonium polyphosphate or polyphosphoric acid amide, and a 1,,3,5-toIJ azine having a structure represented by the general formula [I]. Derivative, [wherein X is a morpholino group or a piperidino group, Y is a divalent group of piperazine, and n is an integer of 2 to 50. ] A composition containing a crosslinking auxiliary agent and a specific amount of one or more thiophosphites selected from those represented by the general formulas [II], [Kawa], [■] and (V) solves the above-mentioned problems. We have found that the problem can be solved, and based on this knowledge, we have completed the present invention.

CH-CH2SP (SRI)2 CH3 [wherein, RI represents an alkyl group having 6 or more carbon atoms, a cycloalkyl group, or an aryl group.

R2 is -8R'2ma or -R:, and R8 is -SR/
s or -R2, and -R'2 and -R'3 represent the same or different alkyl groups, cycloalkyl groups, or aryl groups having 6 or more carbon atoms.

X is -(CH2)-, -(CH2)-〇-(CH2)-
Or n n
mS-R.

Here, n, m, and l represent the same or different integers from 2 to 6. ] As is clear from the above description, an object of the present invention is to provide a flame-retardant polypropylene resin composition from which a molded article having a high degree of flame retardancy can be obtained, which solves the above-mentioned problems.

(Failure to solve the problem) The present invention has the following configuration.

(1) The total of the following (A) to (F) is 100% by weight.
(A) Polyethylene resin 5-30% by weight
(B) Ammonium polyphosphate or polyphosphoric acid amide 12 to 25% by weight (C) 1°3.5-IJ azine derivative having a structure represented by the following general formula [I] 5 to 10% by weight [in the formula, X is a morpholino group or a piperidino group, Y is a divalent group of piperazine, and n is an integer of 2 to 5°. ] (D+ Crosslinking aid 1-15% by weight (El
The following general formula [[), Cu1l), CIV) and [■
] Thiophosphite selected from those represented by 0.05 to 5% by weight.

CHCH25P(SRI)2 [wherein R8 represents an alkyl group, a cycloalkyl group, or an aryl group having 6 or more carbon atoms. R2 is-
SR't or -R; R3 is SR: or -
R1, -R'2, and -R represent the same or different alkyl groups, cycloalkyl groups, or aryl groups having 6 or more carbon atoms. X is =(CH2)-1(CH
2) O(CH2)-n n
mSRI is performed. Here, n, m, and l represent the same or different integers from 2 to 6. ] (F) A flame-retardant polypropylene resin composition, which is the remaining polypropylene resin.

(2) Taking the total of (A) below as 100% by weight, polyethylene resin 5-30% by weight (■3
) Ammonia polyphosphate or polyphosphoric acid amide 12~
25 weight ratio (C) 1゜3.5-toIJ azine derivative having a structure represented by the following general formula [I] 5 to 10% by weight Y [wherein, X is a morpholino group or a piperidino group, and Y is a piperazine group] A divalent group, n is an integer of 2 to 5°. ] CD + crosslinking aid 1-15% by weight (E)
Thiophosphite selected from those represented by the following general formulas [H], [■], [■] and [V]
0.05-5% by weight CHCH2-3P (
5RI)2 Crystal 3 [In the formula, R1 represents an alkyl group, a cycloalkyl group, or an aryl group having 6 or more carbon atoms. R2 is-
SR'2- or -R; R3 is -R2 or -R1; -R'2, -R; is the same or different alkyl group having 6 or more carbon atoms, a cycloalkyl group, or an aryl group; represents a group. X is -(CJ(2)-1-
(CH2) -0-(CHt) -n
nm5-R.

It will be done. 1], m, and A represent the same or different integers from 2 to 6. ] (G) Ethylene-based synthetic rubber or elastomer 5
~30i amount factor (F) A flame-retardant polypropylene resin composition with the remaining polypropylene resin.

A crystalline copolymer containing the above, comprising propylene and ethylene, butene-1, pentene-1, hexene-1,4
-methylpentene-1, heptene-1, octene-1,
A crystalline copolymer with one or more selected from decene-1 or a mixture of two or more of these can be mentioned. Particularly preferred is a crystalline ethylene-propylene block copolymer.

The polyethylene resin used in the present invention can be high density polyethylene, medium density polyethylene, or low density polyethylene, but it is preferable to use high density polyethylene in order to prevent a decrease in the rigidity of the molded product.

The blending ratio of the polyethylene resin is 5 to 3 to the composition.
0% by weight, preferably 7-20% by weight, particularly preferably 10-20% by weight. If the blending ratio is less than 5% by weight, a flame retardance of 5V can be achieved with a 1/8 inch wall thickness in the UL94 flame test, and if it exceeds 30% by weight, a flame retardance of 5V can be achieved with a 1/8 inch wall thickness. This is not preferable because it becomes impossible to achieve flame retardancy of 5V.

Examples of the ethylene-based synthetic rubber or elastomer used in the present invention include ethylene-propylene rubber, ethylene-propylene rubber,
/N-Provinyl/N-diene rubber, ethylene-1-butene rubber, ethylene-vinyl acetate copolymer, polyolefin thermoplastic elastomer, etc. Among these, ethylene-propylene rubber and ethylene-propylene diene rubber are preferably used from the viewpoint of improving impact strength.

The blending ratio of the ethylene synthetic rubber porous ζd elastomer is 5 to 30% by weight, preferably 7 to 2% by weight based on the composition.
0% by weight, particularly preferably 10-20% by weight. If the blending ratio is less than 5% by weight, the effect of improving impact strength is poor, and if it exceeds 30% by weight, the good mechanical strength and heat resistance inherent to polypropylene are lost, which is not desirable.

As the ammonium polyphosphate or polyphosphoric acid amide used in the present invention, it is sufficient to use a commercially available product in its exact size. Examples of the commercially available ammonium polyphosphate include Sumisaf P (trade name, manufactured by Sumitomo Kagaku Kogyo ■), polyphosphoric acid amide, etc. An example of this is Sumisaf PM (trade name, manufactured by Sumima Kagaku Kogyo ■).

The blending ratio of the ammonium polyphosphate or polyphosphoric acid amide is 12 to 25% by weight based on the composition. If the blending ratio is less than 12% by weight, it will not be possible to obtain a composition that achieves a flame retardancy of 5■ with a wall thickness of 1/8 inch in the UL94 flame test, and if the blending ratio exceeds 25% by weight, it will not be possible to obtain a composition that achieves a flame retardancy of 5. Not only is the effect of improving flame retardancy not obtained, but also the hygroscopicity increases due to the ammonium polyphosphate or polyphosphoric acid amide, which is not preferable.

The 1,3,5-triazine derivative used in the present invention includes 2-biperazinylene-4-morpholino-1°3.5
Examples include oligomers or polymers of -triazine, and oligomers or polymers of 2-piperadiene-4-piperidino-1,3,5-triazine.

Part 1. , 3.5-1) The blending ratio of the azine derivative is 5 to 10% by weight relative to the composition. If the blending ratio is less than 5% by weight, it is highly flame retardant.
/8 inch wall thickness cannot achieve 5V flame retardancy, and 10
Even if it is blended in an amount exceeding M%, no further flame retardant improvement effect can be obtained. Further, the above-mentioned oligomer or polymer of 2-biperazinylene-4-morpholino-1,3,5-triazine, which is one of the 1,3,5-triazine derivatives, can be obtained, for example, by the following method. That is, equimolar amounts of 2,6-cyhalo4-morpholino-1
,3,5-triazine (e.g. 2,6-dichloro-4-
Morpholino-1,3,5-triazine or 2,6-
dipromo-4-morpholino-1,3,5-1-riazine) and piperazine with an organic or inorganic base (e.g. triethylamine, tributylamine, sodium hydroxide,
The reaction is carried out in an inert solvent such as xylene under heating, preferably at the boiling point of the inert solvent, in the presence of potassium hydroxide, sodium carbonate, etc.), and after the completion of the reaction, the reaction mixture is filtered to remove by-products. It can be obtained by separating and removing the salt, washing with boiling water and drying.

In addition, the above-mentioned 2-piperadiene-4-piperidino-1
, 3,5-1-riazine oligomers or polymers can also be obtained, for example, by the following method. That is, equimolar 2,6-cyhalo4-piperidino-1,3
, 5-triazine (e.g. 2,6-dichloro-4-piperidino-1,3,5-triazine or 2,6-dipromo-4-piperidino-1,3°5-triazine) and piperazine are combined with an organic or inorganic base ( For example, the reaction is carried out using an inert solvent such as triisopropylbenzene in the presence of triethylamine, tributylamine, sodium hydroxide, potassium hydroxide, sodium carbonate, etc. under heating, preferably below the boiling point of the inert solvent. After the end,
It can be obtained by filtering the reaction mixture to separate and remove by-product salts, washing with boiling water, and drying.

Examples of the crosslinking aid used in the present invention include polyfunctional monomers, oxime nitrone compounds, maleimide compounds, and the like. Specific examples include triallyl isocyanurate, (di)ethylene glycol di(meth)acrylate, l-rimethylolpropane triacrylate, trimethylolpropane trimethacrylate, )-ristyrolethylene triacrylate, pentaerythritol triacrylate, pentaerythritol triacrylate, and pentaerythritol triacrylate. Erythritol
Lutetraacryle-1, divinylbenzene, diallylphthalate, divinylpyridine, quinonedioxime, benzoquinonedioxime, p-nitroso7enol, N
, N'-m-phenylene bismaleimide, etc., but preferably trimedylolpropane tri(
Polyfunctional (meth)acrylic acid esters such as meth)acrylate and pentaeryrisdole triacrylate.

The blending ratio of the crosslinking aid is 1 to 15% by weight, more preferably 1 to 7% by weight. If it is less than 1% by weight, there is almost no drip prevention effect during combustion, and if it is less than 15% by weight,
Although it is possible to add more than 20% of the total amount, there is no point in adding more than 100% of the total amount, since there will be no further improvement in the anti-drip effect.

The aforementioned general formula (ID, [m) used in the present invention, CI
The thiophosphites represented by V) and [v] include trilauryltrithiophosphite, tridecyltrithiophosphite, tribenzyltrithiophosphite, tricyclohexyltrithiophosphite, tri(
2-ethylhexyl) trithioposphite, trinaphthyl trithiophosphite, diphenyldecyl trithiophosphite, diphenyl lauryl trithioposphite, tetralauryl-4-oxabutylene-1,7-tetrathiophosphite, tetrakis(mercaptrauryl) -1,6-dimercabutohexylene diposphite, pentakis(mercaptrauryl)bis(1,6-hexylene-dimerkabut)trithiophosphite, Te1
-Rakis(mercaptrauryl)-2,9-dimercapto-para-methylene diphosphite, bis(mercaptrauryl)-1,6-dimercaptohexylene-bis(
benzenephosphonite), tetrakis(mercaptrauryl)-2,9-dimercapto-para-methylene diphosphite, dioctyl dithiopentaerythritol diphosphite, dilauryl dithiopentaerythritol diphosphite, phenyllauryl dithiopentaerythritol diphosphite, and A mixture of two or more of these can be mentioned.

The blending ratio of the thiophosphite is 0.05 to 5% by weight,
More preferably, the weight ratio is 01 to 2. Mixing ratio is 00
5 weight groove has poor drip prevention effect;
Even if it is added in excess of this amount by weight, there is no point in improving the anti-drip effect.

In the composition of the present invention, various additives that are usually added to polypropylene resins, such as antioxidants, antistatic agents, lubricants, and pigments, can be used in combination.

The flame-retardant polypropylene resin composition of the present invention can be produced, for example, by the following method.

That is, polypropylene resin, the above-mentioned polyethylene resin, polyethylene resin, ethylene-based synthetic rubber or elastomer, ammonium polyphosphate or polyphosphoric acid amide, 1 having a structure represented by the general formula [I],
3.5-IJ azine derivative, crosslinking aid and general formula (
II), C11l), [■], and [v], as well as a predetermined amount of the above-mentioned various additives, are stirred and mixed using a mixing device such as a Hensel mixer (trade name) or a super mixer. , put in a tumbler mixer, stirred and mixed for 1 to 10 minutes, and then melt-kneaded the resulting mixture using a roll, extruder, etc. at a melt-kneading temperature of 1.
It can be obtained by melt-kneading at 70 to 220°C and forming pellets.

(Examples) Hereinafter, the present invention will be specifically explained using Examples and Comparative Examples, but the present invention is not limited thereto. The evaluation method used in Examples and Comparative Examples was as follows.

1)! Conforms to method A of 5V combustion test of [Flammability test of plastic materials for equipment parts-1] of M Flammability UL Subject 94 (Underwriter Laboratories Inc.). The wall thickness of the specimen is 1/8 inch.

2) Flexural modulus , based on JIS K 7203.

3) Izotsu impact strength Compliant with JIS K 7110.

Example 1, Comparative Examples 1 to 2 As a polypropylene resin, ethylene content was 85% by weight, melt flow rate (temperature 230°C, load 2.16%).
Discharge amount of molten resin in 10 minutes when adding kg) 20
g 710 min crystalline ethylene-propylene block copolymer 51 weight ratio, polyethylene resin as component (A) melt index (temperature 190°C, load 2.1.6
(amount of molten resin discharged in 10 minutes when adding kg)
6.5 g/1.0 min ethylene homopolymer (Chisso Polyethylene (trademark) M6801 made by Chisso ■) 15M weight factor 1
Ingredients (Ammonium polyphosphate (Sumisafe P)
(Trademark) manufactured by Sumima Kagaku Kogyo ■) 21% by weight of a polymer of 2-piperadiene-4-morpholino-1,3,5-triazine (n = 11, molecular weight 2770) 8% by weight, 3% by weight of trimethylolpropane triacrylate as a crosslinking agent (D), trilauryl trithiophosphite l- as a thiophosphite (El),
0.5% by weight, 2.6-Gt as other additives
- Put 0.15% by weight of butyl-p-cresol, 0.2% by weight of di-myristyl-β2β-thiodipropionate and 0.1% by weight of calcium stearate into a Hensel mixer (trade name), and mix with stirring for 3 minutes. did. The obtained mixture was melt-cross-extruded using an extruder with a diameter of 45 mm at a melt-mixing temperature of 200° C. and pelletized.

In addition, as Comparative Example 1.2, Comparative Example 1 does not contain polyethylene resin, which is the component hole, and Comparative Example 2 contains trimethylolpropane triacrylate and trilauryl trithiophosphite, which are components (D) and (E). The ingredients were put into a Hensel mixer (trade name) in the proportions as in Example 1, except that they were not blended, and mixed by stirring, melt-cross-extruded, and pelletized in accordance with Example.

After drying the pellets obtained in Examples and Comparative Examples at a temperature of 100°C for 3 hours, the pellets were tested for flame retardancy and flexural modulus using an injection molding machine with the maximum temperature of the cylinder set at 220°C. , and predetermined test pieces for Izod impact strength measurement were molded.

Using this test piece, flame retardancy, flexural modulus, and Izod impact strength were measured. The results are shown in Table @1.

Examples 2 to 5, Comparative Examples 3 to 4 Based on Example 1 except that the blending ratios of polypropylene resin, polyethylene resin, trimethylolpropane triacrylate, and trilauryltrithiophosphite were changed as shown in Table 1. Each of the ingredients was put into a Hensel mixer (trade name), mixed by stirring, melt-kneaded and extruded, and pelletized in accordance with Example 1.

A test piece for flame retardancy evaluation was prepared according to Example 1 using the pellets obtained in each of the implementation and comparison sides, and the flame retardance was evaluated. The results are shown in Table 1.

Example 6 Example 1 except that a polymer of 2-biperazinylene-4-piperidino-1,3,5-triazine (n=11, molecular weight 2800) was used as the 1,3,5-triazine derivative serving as component (C). Each compounded component was put into a Hensel mixer (trade name) according to Example 1, and mixed by stirring, melt cross-wire extruded, and pelletized according to Example 1. Using the obtained pellets, a test piece for flame retardancy evaluation was prepared using pi in accordance with Example 1, and flame retardancy was evaluated. The results are shown in Table 1.

Examples 7 to 13, Comparative Examples 5 to 13 The polypropylene resin as component (F) had an ethylene content of 8.5% by weight and a melt flow rate of 20.971.
0 minute crystalline ethylene-propylene block copolymer,
The polyethylene resin that is the component hole is an ethylene homopolymer with a melt index of 6.5.9/10 (Chisso Polyethylene (trademark) M680, manufactured by Chisso ■), and the ethylene synthetic rubber that is the component (G) is also an elastomer. ethylene-propylene rubber (JSREP (trademark) 02P, manufactured by Japan Synthetic Rubber ■), trimethylolpropane triacrylate as component CD+, and trilauryltrithioposphite as component (E) in the blending ratios listed in Table 2. In addition, 21% by weight of ammonium polyphosphate (Sumisafe P (trademark) manufactured by Sumitomo Chemical Co., Ltd.) as component (13), 1,3.5- as component c), and 2- as an azine derivative biperazinylene-4-morpholino-1,
, 3,5-triazine polymer (n=11, molecular weight 2770) as Sffi amount % and various additives.
6-di-t-butyl-p-cresol, 0.15 ta
%, di-myristyl-β, β-thiodibropione 1-
0.2% by weight and 0.1% by weight of calcium stearate were placed in a Hensel mixer (trade name) and stirred and mixed for 3 minutes. The resulting mixture was melt-kneaded and extruded using an extruder with a diameter of 45ii at a melt-kneading temperature of 200'C to form pellets.

After drying the pellets obtained on each experimental side and each comparative side at a temperature of 100°C for 3 hours, the pellets were used to mold flame retardant and Izotsu resin in an injection molding machine with the maximum temperature of the cylinder set at 220°C. Predetermined test pieces for impact strength measurements were each molded. Flame retardancy and Izod impact strength were measured using the test piece. The results are shown in Table 2.

(Effects of the Invention) The composition of the present invention has a high degree of flame retardancy, that is, a flame retardance of 5V at 1/8 inch wall thickness in the UL94 flame test, and is free from corrosive gases and toxic gases during processing and combustion. There is no generation of gas,
Moreover, it is a flame-retardant polypropylene resin composition that can produce molded products with excellent impact resistance, with little deterioration in molding processability or mechanical strength of the molded products. Therefore parts of buildings, interior decoration, household appliances,
It can be suitably used for manufacturing automobile parts and the like.

that's all

Claims (3)

[Claims] (1) The total of the following (A) to (F) is 100% by weight.
(A) 5 to 30% by weight of polyethylene resin (B) Ammonium polyphosphate or polyphosphoric acid amide 12
~25% by weight (C) 1 having the structure represented by the following general formula [I]
, 3,5-triazine derivative 5-10% by weight ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [I] [In the formula, X is a morpholino group or piperidino group, Y is a divalent group of piperazine, and n is 2- It is an integer of 50. ] (D) 1 to 15% by weight of crosslinking aid (E) The following general formulas [II], [III], [IV] and [V
0.05 to 5% by weight of thiophosphite selected from those represented by , tables, etc. ▼ [V] [In the formula, R_1 represents an alkyl group, a cycloalkyl group, or an aryl group having 6 or more carbon atoms. R_2
is -SR'_2 or -R'_2, and R_3 is -S
R'_3 or -R'_3, -R'_2, -R'
_3 represents the same or different alkyl group, cycloalkyl group, or aryl group having 6 or more carbon atoms. X is -(CH_2)_n, -(CH_2)_n-O-(
It is represented by CH_2)_m- or ▲There are mathematical formulas, chemical formulas, tables, etc.▼. Here, n, m, and l represent the same or different integers from 2 to 6. ] (F) A flame-retardant polypropylene resin composition, which is the remaining polypropylene resin. (2) The total of the following (A) to (G) is 100% by weight.
(A) 5 to 30% by weight of polyethylene resin (B) Ammonium polyphosphate or polyphosphoric acid amide 12
~25% by weight (C) 1 having the structure represented by the following general formula [I]
, 3,5-triazine derivative 5-10% by weight ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [I] [In the formula, X is a morpholino group or piperidino group, Y is a divalent group of piperazine, and n is It is an integer from 2 to 50. ] (D) 1 to 15% by weight of crosslinking aid (E) The following general formulas [II], [III], [IV] and [V
0.05 to 5% by weight of thiophosphite selected from those represented by , tables, etc. ▼ [IV] ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [V] [In the formula, R_1 represents an alkyl group, a cycloalkyl group, or an aryl group having 6 or more carbon atoms. R_2
is -SR'_2 or -R'_2, and R_3 is -S
R'_3 or -R'_3, -R'_2, -R'
_3 represents the same or different alkyl group, cycloalkyl group, or aryl group having 6 or more carbon atoms. X is -(CH_2)_n-, -(CH_2)_n-O-
It is represented by (CH_2)_m- or ▲There are mathematical formulas, chemical formulas, tables, etc.▼. Here, n, m, and l represent the same or different integers from 2 to 6. ] (G) Ethylene-based synthetic rubber or elastomer 5-3
0% by weight (F) Flame-retardant polypropylene resin composition, which is the remaining polypropylene resin. (3) The polypropylene resin is a crystalline propylene homopolymer or a crystalline copolymer containing 70% by weight or more of a propylene component, which includes propylene and ethylene, butene-1, pentene-1, hexene-1, 4- Claim 1 or Claim 2 wherein a crystalline copolymer with one or more selected from methylpentene-1, heptene-1, octene-1, and decene-1 or a mixture of two or more of these is used.
The flame retardant polypropylene resin composition described.