JPH0776649A - Flame-retardant resin composition - Google Patents

Abstract

PURPOSE:To obtain a flame-retardant resin composition having excellent flame- retardance and good flexural modulus and useful for OA equipments or materials for various part items by compounding a thermoplastlc resin containing a polycarbonate resin with a phosphorus compound and a thermosetting resin. CONSTITUTION:This flame-retardant resin composition is composed of (A) 100 pts.wt. of a polycarbonate resin or a thermoplastic resin containing a polycarbonate resin and a resin other than polycarbonate resin, preferably a polymer blend of 99-30wt.% of a polycarbonate resin and 1-70wt.% of an ABS resin, (B) 5-20 pts.wt. of a phosphorus compound, preferably a phosphoric acid ester of the formula (R<1> to R<3> are phenyl, O-cresyl, etc.; (n) is 0 or 1) and (C) 1-20 pts.wt. of a thermosetting resin, preferably a phenolic resin. When the component C is a novolak phenolic resin, the components B and C are mixed with each other at a ratio to satisfy the relationship of x/y=0.32 to 1.00 wherein x is molar number of the phosphorus atom in the component B and y is molar number of the phenolic OH group of the phenolic resin.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a flame-retardant resin composition. More specifically, it relates to a flame-retardant resin composition obtained by blending a phosphorus compound and a thermosetting resin into a thermoplastic resin containing a polycarbonate resin.

[0002]

2. Description of the Related Art Polycarbonate resins are widely used industrially because they have excellent mechanical properties and thermal properties. However, due to the problem of poor processability and moldability, many polymer blends with other thermoplastic resins have been developed, among which polystyrene-based resins, acrylonitrile-butadiene-styrene (ABS) -based resins, polyester-based resins, etc. The polymer blend with is widely used in the fields of automobiles, office automation equipment, electronics and electricity, etc. On the other hand, in recent years, there has been a strong demand for flame-retardant resin materials used mainly for applications such as office automation equipment and home electric appliances, and many flame-retardant resins have been developed and studied in order to meet these demands. Conventionally, chlorine- or bromine-containing compounds are mainly used for flame retardation of resin components including polycarbonate resins, and in many cases, antimony trioxide or the like is used as a flame retardant aid in addition to those flame retardants. It is used together.

[0003]

When a chlorine- or bromine-containing compound is used for flame-retarding a resin containing a polycarbonate resin, the flame-retarding effect is relatively large,
When a fire or incineration process occurs, a toxic or harmful substance is generated, which makes it difficult to perform emergency activities or fire fighting activities, or causes environmental pollution. Therefore, it is desired to develop a flame-retardant resin containing no chlorine or bromine-containing compound or containing a small amount of chlorine or bromine-containing compound. Further, when an inorganic substance such as antimony trioxide is used as the flame retardant component, there is a problem that the mechanical properties of the flame retardant resin are deteriorated. The present invention solves these conventional problems, and an object of the present invention is to provide a flame-retardant resin composition having excellent flame retardancy and good flexural modulus. .

[0004]

The present inventors have improved the flame retardancy of a polycarbonate resin or a polymer blend containing the polycarbonate as one component by using a flame retardant essentially containing no chlorine or bromine. As a result of earnest studies, the compounding of a phosphorus compound and a thermosetting resin not only exhibits an excellent flame retardant effect but also exhibits a good flexural modulus, and further, a phosphorus compound. It has been found that an excellent flame retarding effect is exhibited by blending a novolac type phenol resin and a novolac type phenol resin in a specific ratio, and the present invention has been accomplished. That is, the present invention provides (1) a flame-retardant resin containing the following component (A) a polycarbonate-based resin or a thermoplastic resin containing a polycarbonate-based resin and a resin other than the polycarbonate-based resin (B) a phosphorus compound (C) a thermosetting resin Resin composition, (2) 100% by weight of a polymer blend comprising (A ') a polycarbonate resin (99 to 30% by weight) and an ABS resin (1 to 70% by weight), (B').
Flame-retardant resin composition containing 5 to 20 parts by weight of phosphoric acid ester and 1 to 20 parts by weight of (C ′) phenol resin, (3) (A) polycarbonate resin or polycarbonate resin and resin other than polycarbonate resin A thermoplastic resin containing (B) a phosphorus compound (C) a novolac type phenolic resin, wherein the number of moles of phosphorus atoms contained in the phosphorus compound x and the number of phenolic OH groups of the novolac type phenolic resin The ratio x / y with y is 0.32-1.
A flame-retardant resin composition of No. 00, (4) 100 parts by weight of a polymer blend in which the composition according to (3) is composed of 99 to 30 wt% of (A ′) polycarbonate resin and 1 to 70 wt% of ABS resin. , (B ')
A resin composition containing 5 to 20 parts by weight of a phosphoric acid ester and 1 to 20 parts by weight of a novolak type phenolic resin (C '), wherein the number x of moles of phosphorus atoms contained in the phosphoric acid ester and the phenolic OH of the novolak type phenolic resin. Number of moles of group y
The flame retardant resin composition has a ratio x / y of 0.32 to 1.00. Hereinafter, the present invention will be described in detail.

The polycarbonate resin used in the present invention is produced by reacting a dihydric phenol with a carbonate precursor by a solution method or a melting method.
Typical examples of the dihydric phenol are 2,2-bis (4-hydroxyphenyl) propane [bisphenol A], bis (4-hydroxyphenyl) methane, 1,1.
-Bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, bis (4- Examples thereof include hydroxyphenyl) sulfide and bis (4-hydroxyphenyl) sulfone. A preferred dihydric phenol is a bis (4-hydroxyphenyl) alkane-based one, and more preferably one containing bisphenol A as a main raw material. Further, as the carbonate precursor, carbonyl halide,
Examples thereof include carbonyl ester and haloformate, and specifically, phosgene, diphenyl carbonate, dimethyl carbonate, dihaloformate of dihydric phenol, and a mixture thereof. In producing a polycarbonate resin, one or more of these dihydric phenols can be used. The polycarbonate resins thus obtained may be used in combination of two or more. In the present invention, a halogen-free polycarbonate is preferably used.

As the resin other than the polycarbonate resin used in the present invention, any thermoplastic resin can be effectively used without any particular limitation. Typical examples among them include polystyrene resin, ABS resin, polyester resin (PBT, PET), (modified) polyethylene, (modified) polypropylene, (modified)
Examples thereof include ethylene / propylene copolymer resin, polyphenylene ether, polyamide resin, polyacetal, polymethyl methacrylate and the like. These resins can be used in combination of two or more kinds. Next, some of these will be described in more detail.

The polystyrene resin used in the present invention is a polymer obtained by polymerizing an unsaturated monomer containing an aromatic vinyl monomer, and further, the polymer is a rubber-based polymer. It also includes a polymer modified by coalescence. Examples of the aromatic vinyl monomer used as the unsaturated monomer include styrene, α-methylstyrene, vinyltoluene, t-butylstyrene, hydroxystyrene and halostyrene. Furthermore, together with these monomers, (meth) acrylonitrile, (meth)
One or more kinds of monomers selected from acrylic acid, (meth) acrylic acid ester, maleimide-based monomers, unsaturated dicarboxylic acid anhydride-based monomers and the like can be used. Examples of the (meth) acrylic acid ester include methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate and the like. As the maleimide-based monomer, maleimide, N-methylmaleimide, N-ethylmaleimide, N
-Propylmaleimide, N-hexylmaleimide, N-
Examples thereof include cyclohexylmaleimide and N-phenylmaleimide. Examples of unsaturated dicarboxylic acid anhydride-based monomers include maleic anhydride. The method for producing the polystyrene resin is not particularly limited, and known methods such as bulk polymerization, solution polymerization, suspension polymerization and emulsion polymerization can be used.

Specific examples of the polystyrene resin include polystyrene, α-methylstyrene / acrylonitrile copolymer, styrene / acrylonitrile copolymer, styrene / methyl methacrylate copolymer, styrene / methacrylic acid copolymer, styrene / Maleic anhydride copolymer, α
-Methylstyrene / acrylonitrile / N-phenylmaleimide copolymer, styrene / acrylonitrile / N-
Examples thereof include phenylmaleimide copolymers, styrene / N-phenylmaleimide / maleic anhydride copolymers, and rubber modified products thereof.

The ABS resin used in the present invention is a graft polymer obtained by graft-polymerizing a vinyl-based monomer containing an aromatic vinyl-based monomer into a rubber-like polymer. It also includes a blend of a polymer obtained by polymerizing a vinyl monomer containing an aromatic vinyl monomer and the graft polymer. The graft polymer is a rubber-like polymer having a glass transition temperature of 10 ° C. or lower, and an aromatic vinyl monomer and (meth) acrylonitrile, (meth) acrylic acid ester, maleimide monomer, unsaturated dicarboxylic acid. It is obtained by graft-polymerizing at least one monomer selected from anhydride monomers and the like. Examples of the aromatic vinyl-based monomer include styrene, α-methylstyrene, vinyltoluene, t-butylstyrene, hydroxystyrene and halostyrene. Examples of the (meth) acrylic acid ester include methyl acrylate, ethyl acrylate, methyl methacrylate,
Examples thereof include ethyl methacrylate. As the maleimide-based monomer, maleimide, N-methylmaleimide, N-
Ethyl maleimide, N-propyl maleimide, N-hexyl maleimide, N-cyclohexyl maleimide, N-
Examples include phenylmaleimide. Examples of unsaturated dicarboxylic acid anhydride-based monomers include maleic anhydride. These monomers can be used in combination of two or more kinds. Monomers preferably used in the graft polymer used in the present invention are styrene and acrylonitrile and / or methyl methacrylate. The method for producing the graft polymer is not particularly limited, and known methods such as bulk polymerization, solution polymerization, suspension polymerization and emulsion polymerization can be used.

Examples of the rubbery polymer used for the graft polymer include polybutadiene, butadiene-styrene copolymer, butadiene-styrene block copolymer, hydrogenated butadiene-styrene block copolymer, and butadiene-acrylonitrile copolymer. , Acrylic rubber, ethylene-propylene (diene component) copolymer, isobutylene-isoprene copolymer, styrene-isoprene block copolymer, hydrogenated styrene-isoprene block copolymer, polyurethane rubber, polyamide rubber, silicone Examples include rubbers. In the present invention, preferably polybutadiene, butadiene-styrene copolymer,
Acrylic rubber, ethylene-propylene (diene component)
Copolymers, silicone rubbers, etc. are used.

As the polymer to be blended with the graft polymer, a polymer obtained by polymerizing the monomers used in the above graft polymer can be used. Polymers preferably used are α-methylstyrene / acrylonitrile copolymer, styrene / acrylonitrile copolymer, α
-Methylstyrene / methylmethacrylate copolymer, styrene / methylmethacrylate copolymer, α-methylstyrene / acrylonitrile / N-phenylmaleimide copolymer, styrene / acrylonitrile / N-phenylmaleimide copolymer, styrene / N -Phenylmaleimide / maleic anhydride copolymer and the like. These polymers may be used alone or in combination of two or more. The method for producing these polymers is not particularly limited, and known methods such as bulk polymerization, solution polymerization, suspension polymerization and emulsion polymerization can be used.

When a polymer blend of a polycarbonate-based resin and a resin other than the polycarbonate-based resin is used in the present invention, the compounding ratio thereof is polycarbonate-based resin / resin other than the polycarbonate-based resin = 99/1 to 3
The range of 0/70 (weight ratio) is preferable, and the range of 95/5 to 40/60 (weight ratio) is more preferable. If the ratio of the resin other than the polycarbonate resin exceeds 70% by weight, the original properties of the polycarbonate resin may not be maintained, which is not preferable. The ABS resin is preferably used as a resin other than the polycarbonate resin in order to impart a well-balanced physical property to the resin composition, which has good flame retardancy and flexural modulus.

The phosphorus compound used in the present invention is not particularly limited as long as it is a compound having a phosphorus atom, but the phosphorus compound represented by the general formula (I) is preferably used.

[Chemical 1] In the formula, R ₁ , R ₂ and R ₃ each independently represent a C _{1 to} C ₈ alkyl group or a C _{6 to} C ₂₀ aryl group optionally substituted with alkyl, and n is 0 or 1. Examples of these phosphorus compounds include trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, trioleyl phosphate, triphenyl phosphate, tricresyl phosphate, trixyl phosphate. Nylphosphate, tris (isopropylphenyl) phosphate, tris (o-phenylphenyl) phosphate, tris (p-phenylphenyl) phosphate, trinaphthylphosphate, cresyldiphenylphosphate, xylenyldiphenylphosphate, diphenyl (2-ethylhexyl) phosphate , Di (isopropylphenyl) phenyl phosphate, o-phenylphenyl dicresyl phosphate, di Chiruhosufeto, monobutyl phosphate, di -2
-Ethylhexyl phosphate, monoisodecyl phosphate, 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl-2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate and condensates thereof and the like. To be

Examples of the phosphorous acid ester include trimethyl phosphite, triethyl phosphite, tributyl phosphite, tri (2-ethylhexyl) phosphite, tributoxyethyl phosphite, trioleyl phosphite, triphenyl phosphite, tricresyl phosphite. Fight, trixylenylphosphite, tris (isopropylphenyl) phosphite, trisnonylphenylphosphite, tris (o-phenylphenyl) phosphite, tris (p-phenylphenyl) phosphite, trinaphthylphosphite, cresyldiphenyl Phosphite, xylenyl diphenyl phosphite, diphenyl (2-ethylhexyl) phosphite, di (isopropylphenyl) phenyl phosphite, o-phenylphenyl dicresi Phosphite, dibutyl phosphite, monobutyl phosphite, di-2-ethylhexyl phosphite, monoisodecyl phosphites and condensates thereof and the like. Examples of phosphorus compounds other than these include triphenylphosphine oxide, tricresylphosphine oxide, diphenyl methanephosphonate, and diethyl phenylphosphonate. These phosphorus compounds may be used alone or in combination of two or more.

Among these phosphorus compounds, in the formula (I), R ₁ , R ₂ and R ₃ are independently selected from phenyl group, o-cresyl group, p-cresyl group and m-cresyl group. A phosphoric acid ester represented by a group is preferably used. Examples of such phosphoric acid ester include triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate and the like. Of these, triphenyl phosphate is particularly preferably used.

The blending amount of these phosphorus compounds is not particularly limited, but is preferably 1 to 3 with respect to 100 parts by weight of the component (A).
It is in the range of 0 parts by weight. More preferably, it is in the range of 5 to 20 parts by weight. If the amount is less than 1 part by weight, a sufficient flame retarding effect cannot be obtained, and if the amount is more than 30 parts by weight, the heat resistance of the resulting composition is remarkably lowered, and volatile components increase during molding. Cause

The thermosetting resin used in the present invention undergoes a curing reaction due to intermolecular cross-linking due to heat, and is insoluble and infusible.
It is a resin that forms a three-dimensional network structure, and examples thereof include phenol resin, melamine resin, urea resin, furan resin, guanamine resin, xylene resin, xylylene resin, and epoxy resin. Next, among these, the phenol resin will be described in more detail.

The phenolic resin used in the present invention is obtained by reacting phenols with aldehydes and / or ketones in the known manner under acidic or alkaline catalyst.
Examples of phenols include phenol, cresol, xylenol, ethylphenol, propylphenol, butylphenol, amylphenol, nonylphenol, phenylphenol, phenoxyphenol, hydroquinone, resorcinol, dihydroxydiphenyl, bis (hydroxyphenyl) pentane, dihydroxydiphenylmethane, bis (hydroxy). Phenyl) butane, dihydroxydiphenyl sulfone, dihydroxydiphenyl ketone, bis (hydroxyphenyl) propane, and the like, and mixtures thereof.

Examples of aldehydes include formaldehyde, paraformaldehyde, acetaldehyde, glyoxal and the like. Further, an aromatic monoaldehyde having at least one phenolic hydroxyl group in one molecule can also be used. Examples of such aromatic monoaldehydes include o-hydroxybenzaldehyde, m-hydroxybenzaldehyde, p-hydroxybenzaldehyde, β-resorcylaldehyde, and vanillin. Further, examples of the ketones include acetone.
These aldehydes and / or ketones may be used alone or in combination of two or more.
In the present invention, both a resol type resin and a novolac type phenolic resin can be used, but a novolac type phenolic resin is preferably used. Further, in the present invention, a novolac type phenol resin obtained by substituting a part or all of the above aldehyde and / or ketone with a diol compound and / or dicyclopentadiene and reacting with the above phenol can also be used. Examples of preferable diol compounds include p-xylene-α, α′-diol and the like.

When the novolac type phenol resin is used, the weight average molecular weight is preferably in the range of 350 to 2,800. The range of 350 to 1900 is particularly preferable.

The blending amount of the thermosetting resin is not particularly limited, but preferably 1 to 30 per 100 parts by weight of the component (A).
The range is parts by weight. More preferably, it is in the range of 1 to 20 parts by weight. If the amount is less than 1 part by weight, sufficient flame retarding effect and good flexural modulus cannot be obtained, and if the amount is more than 30 parts by weight, adverse effects such as remarkable decrease in impact resistance of the resulting composition occur. .

Further, in the present invention, when a novolak type phenol resin is used, the ratio x / y of the number x of phosphorus atoms contained in the phosphorus compound and the number y of phenolic OH groups of the novolac type phenol resin is 0. The compounding amount is determined so as to be in the range of 0.32 to 1.00. Preferably, 0.
40 to 0.90, and particularly preferably 0.60 to
It is 0.70. The range where x / y is less than 0.32 and 1.
If it exceeds 00, a sufficient flame retarding effect cannot be obtained, which is not preferable. Further, in order to obtain a flame-retardant resin composition that provides well-balanced physical properties such as mechanical properties and heat resistance, the compounding amount of the phosphorus compound is 5 to 20 parts by weight based on 100 parts by weight of the component (A). And the amount of the novolac type phenolic resin is set to x / y of 0.32 to 1.00.
While satisfying the range of 1 to 30 parts by weight per 100 parts by weight of component (A), particularly preferably 1 to 2
The amount is 0 parts by weight. If the amount is less than 1 part by weight, a sufficient flame retarding effect cannot be obtained, and if the amount is more than 30 parts by weight, the impact resistance of the resin composition is significantly deteriorated. Further, the phenomenon that the molten resin that burns when the resin burns is dropped is not a preferable phenomenon for disaster prevention. For the purpose of preventing such resin dripping, in the present invention, a fluorine-based resin or silicone can be blended.

The silicone used in the present invention is, in principle, in the molecular structure thereof.

[Chemical 2] There is no particular limitation as long as it has a skeleton. Examples of the silicone used in the present invention include polydimethylsiloxane, polymethylphenylsiloxane, amino-modified silicone, mercapto-modified silicone, and epoxy-modified silicone. These may be used alone or in combination of two or more. Furthermore, these silicones can be used in a wide range of molecular weights of several hundreds to several millions, and their forms are oily, varnish-like, gum-like,
It may be in any form such as resin. In the present invention, polydimethylsiloxane is preferably used.

Examples of the fluororesin used in the present invention include polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and tetrafluoride. Examples thereof include ethylene-ethylene copolymers, polytrifluoroethylene chloride, and polyvinylidene fluoride. These may be used alone or in combination of two or more.
The fluorinated resin may be in any form such as emulsion, suspension, microfibril, powder and granule. In the present invention, polytetrafluoroethylene is preferably used.

The amounts of silicone and fluororesin used in the present invention are based on 100 parts by weight of the total of the component (A).
It is in the range of 0.01 to 5 parts by weight. If the amount of silicone or fluorine-based resin is 0.01 parts by weight or less, a sufficient anti-dripping effect cannot be obtained, and if it exceeds 5 parts by weight, the blended resin composition may cause poor appearance of molded articles, increase in melt viscosity, etc. A defective phenomenon may occur. The flame-retardant resin composition of the present invention exhibits an excellent flame-retardant effect without using a compound containing bromine or chlorine as a flame-retardant component. Additives can also be used together. The flame retardant additive is not particularly limited as long as it has a flame retardant effect, red phosphorus, chlorine or bromine-containing compounds, antimony compounds, nitrogen compounds, boron compounds, thermally expansive graphite, metal oxides, Flame retardant additives such as metal hydroxides, alkali (earth) metal salts, polynuclear substituted hydroxystyrenes, etc. can be used. These flame retardant additives may be used alone or in combination of two or more.

There is no particular limitation on the method of mixing the resin and the flame retardant, and any means can be adopted as long as it can uniformly mix them. For example, mixing, kneading, and the like using various mixing machines such as an extruder, a Henschel mixer, a Banbury mixer, a kneader, and a heating roll can be appropriately adopted.

At this time, if necessary, various fillers, additives and the like can be added in an amount such that the effect is exhibited within the range of not impairing the flame retardancy. Examples thereof include glass fibers, asbestos, carbon fibers, aromatic polyamide fibers, potassium titanate whisker fibers, metal fibers, ceramic fibers, fibrous fillers such as boron whisker fibers, mica, silica, talc, clay, calcium carbonate, Glass beads,
Fillers such as glass balloons and glass flakes, additives such as release agents, lubricants, plasticizers, UV absorbers, light stabilizers, antioxidants, heat resistance stabilizers, antioxidants, dyes (face), etc. Is mentioned. Further, an impact strength improver for improving the properties of the polymer blend, a compatibilizing component and the like can be added.

[0028]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Examples 1 to 10 and Comparative Examples 1 to 6 Each component shown in Table 1 was mixed at a compounding ratio shown in the table with a Henschel mixer, and a 30 mmφ twin-screw extruder (PCM-30, manufactured by Ikegai Tekko KK) was used. The mixture was melt-kneaded and extruded at 250 to 280 ° C., and pelletized by a pelletizer. A test piece was prepared from the pellets thus obtained using an injection molding machine, and the flammability and flexural modulus were evaluated.
The results are shown in Table 1. UL combustion test is 127 mm x 12.7 mm x 1.6 m by injection molding from the obtained pellets.
Combustion test piece of m was prepared and subject 94 (UL-94) of Underwriters Laboratory, USA
It measured according to a vertical burning test. Oxygen index is JIS K-
It measured according to 7201. Flexural modulus is JIS K-7
It measured according to 203.

[0029]

[Table 1]

Examples 11 to 17 After mixing the components shown in Table 2 in the proportions shown in the table with a Henschel mixer, a 30 mmφ twin-screw extruder (PCM-30, manufactured by Ikegai Tekko KK) was used, and 250 to 280 were used. The mixture was melt-kneaded and extruded at ℃, and pelletized by a pelletizer. A test piece was prepared from the pellets thus obtained using an injection molding machine, and the flammability was evaluated. The results are shown in Table 2. In the UL combustion test, a 127 mm x 12.7 mm x 1.6 mm combustion test piece was produced from the obtained pellets by injection molding, and subjected to the Subject 94 (UL-94) vertical combustion test of Underwriters Laboratory, Inc. in the United States. It was measured.

[0031]

[Table 2]

The symbols in Tables 1 and 2 are as follows. (A) PC: Polycarbonate (Novarex 7030PJ, Mitsubishi Kasei Co., Ltd.) (B) ABS: ABS resin (GR-
2000) (C) TPP: triphenyl phosphate (Dahachi Chemical Industry Co., Ltd. TPP) (D) N1: average structural formula:

[Chemical 3] (Novolac type phenolic resin represented by (weight average molecular weight 1100) (Showa Highpolymer Co., Ltd. BRG-556) (E) N2: The average structural formula is

[Chemical 4] Novolak type phenolic resin represented by (weight average molecular weight 2800) (XL-225-2, Mitsui Toatsu Chemicals, Inc.)
L) (F) N3: a novolak type phenol resin (BRG-555, Showa High Polymer Co., Ltd.) having the same average structural formula as the chemical formula shown in Chemical Formula 3 and a weight average molecular weight of 900 (G) N4: The average structural formula is the same as the chemical formula represented by Chemical formula 4, and the novolac type phenol resin represented by the weight average molecular weight 1037 (MEH7800, Meiwa Kasei Co., Ltd.) (H) N5: The average structural formula is

[Chemical 5] Novolak type phenolic resin represented by (weight average molecular weight 350) (MEH7500, Meiwa Kasei Co., Ltd.) (I) r: mole number x of phosphorus atom contained in TPP and mole of phenolic OH group of novolac type phenolic resin Ratio of number y to x / y

[0033]

INDUSTRIAL APPLICABILITY According to the present invention, a flame-retardant resin composition having excellent flame retardancy and good flexural modulus is provided, which is used as a material for various applications such as electronic / electrical products and OA equipment. It can be preferably used.

Claims (4)

[Claims] 1. A flame-retardant resin composition comprising the following components. (A) Polycarbonate-based resin or thermoplastic resin containing polycarbonate-based resin and resin other than polycarbonate-based resin (B) Phosphorus compound (C) Thermosetting resin 2. The composition according to claim 1, wherein 100 parts by weight of a polymer blend comprising (A ′) a polycarbonate resin of 99 to 30% by weight and an ABS resin of 1 to 70% by weight, and (B ′) a phosphoric ester 5 To 20 parts by weight, and 1 to 20 parts by weight of (C ') phenol resin, a flame-retardant resin composition. 3. A resin composition comprising (A) a polycarbonate resin or a thermoplastic resin containing a polycarbonate resin and a resin other than the polycarbonate resin, (B) a phosphorus compound (C) a novolac type phenolic resin, The ratio x / y of the number x of phosphorus atoms contained in the compound and the number y of phenolic OH groups of the novolak type phenol resin is 0.32 to 1.
A flame-retardant resin composition, which is 00. 4. The composition according to claim 3, wherein 100 parts by weight of a polymer blend consisting of 99 to 30% by weight of (A ′) polycarbonate resin and 1 to 70% by weight of ABS resin, and (B ′) phosphate 5 To 20 parts by weight of (C ') 1 to 20 parts by weight of novolak type phenolic resin, wherein the number x is the number of moles of phosphorus atoms contained in the phosphoric acid ester and the number of phenolic OH groups of the novolac type phenolic resin. A flame-retardant resin composition, wherein the ratio x / y with the number y is 0.32 to 1.00.