JP2000103970A - Flame-retardant resin composition, its production, flame- retardant for thermoplastic resin and flame-retardant auxiliary for thermoplastic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flame-retardant resin composition having excellent flame retardance by the use of a nonhalogen-based flame-retardant, useful for a domestic article, or the like, by using both a phenol/starch resin and a phosphorus- based compound. SOLUTION: This composition is obtained by mixing (A) 100 pts.wt. of a thermoplastic resin with (B) 0.5-100 pts.wt. of a phenol/starch resin and (C) 0.5-50 wt.% of a phosphorusbased compound. Preferably, the component A is blended with a mixture or a molten kneaded material of the component B and the component C and kneaded in a molten state to give the objective composition. At least one kind selected from the group consisting of a polyolefin-based resin, a polystyrene-based resin and a polyphenylene ether-based resin is used as the component A. At least one kind selected from the group consisting of red phosphorus, a phosphoric ester and melamine phosphate is used as the component C. The composition comprises 0-200 pts.wt. of at least one kind of inorganic hydrate selected from the group consisting of magnesium hydroxide, aluminum hydroxide and calcium hydroxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition having excellent flame retardancy, a method for producing the same, and a flame retardant and a flame retardant auxiliary for a thermoplastic resin. More particularly, the present invention relates to a flame-retardant resin composition containing a halogen-free flame retardant and a flame-retardant auxiliary containing no halogen-based compound, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, thermoplastic resins have been used in a wide range of applications because of their excellent moldability. In particular, when used as products such as household goods, electric products, OA equipment, automobiles, and building materials, it is required to have flame retardancy. As a known method of making a thermoplastic resin flame-retardant, a method of blending a flame retardant can be mentioned. In many cases, a halogen compound is used as the flame retardant.

[0003]

When a halogen-based compound is used to make a thermoplastic resin flame-retardant, the effect of the flame-retardation is relatively large, but it is toxic or harmful in the event of a fire or incineration. Because of the emission of such substances, it is difficult to perform rescue and fire fighting activities, and there are problems such as causing environmental pollution. In order to cope with such environmental problems, various attempts have been made to design a flame retardant that does not use a halogen-based compound, that is, a non-halogen-based flame retardant. It was extremely difficult to find anything.

[0004] As a method of making a thermoplastic resin flame-retardant using a non-halogen compound, for example, JP-A-8-16
No. 5406 discloses a method in which a phenol novolak resin and melamine phosphate are used in combination. But,
Although the flame retardancy is improved by such a method, the effect of the improvement was not satisfactory. The present invention is intended to solve these conventional problems, and an object thereof is to provide a resin composition having excellent flame retardancy using a non-halogen flame retardant, and a thermoplastic resin. An object of the present invention is to provide a non-halogen type flame retardant capable of imparting excellent flame retardancy to the composition.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on flame retardancy using a non-halogen compound of a thermoplastic resin, and as a result, phenol which has been conventionally used as an auxiliary agent of a phosphorus-based flame retardant has been studied. The inventors have found that the use of a phenol-starch resin instead of the novolak resin and the combined use of the phenol-starch resin and a phosphorus compound significantly improve the flame retardancy, thereby completing the present invention. That is, the present invention provides a flame-retardant resin composition characterized by comprising a phenol-starch resin (B) and a phosphorus compound (C) mixed with a thermoplastic resin (A), and a method for producing the same; ,
The flame-retardant resin composition comprising an inorganic hydrate (D) and a method for producing the same; for a thermoplastic resin containing a phenol-starch resin (B) and a phosphorus compound (C) A flame retardant; and a flame retardant auxiliary comprising a phenolic starch resin (B).

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermoplastic resin (A) as a base polymer in the flame-retardant resin composition of the present invention is not particularly limited, and various known resins can be used. Polyolefin resins; Polystyrene resins; Polyphenylene ether resins; Polycarbonates; Polyesters such as polyethylene terephthalate and polybutylene terephthalate; Resins such as polyphenylene sulfide; these may be used alone or in combination of two or more. it can. Among these, at least one selected from the group consisting of polyolefin-based resins, polystyrene-based resins, and polyphenylene ether-based resins is preferable. The polyolefin resin used in the present invention is not particularly limited, and various known resins can be used. Among them, polyethylene resin and polypropylene resin are preferable.

The polyethylene resin used in the present invention is not particularly limited, and various known resins can be used.
For example, low density polyethylene, linear low density polyethylene, high density polyethylene, modified polyethylene and the like can be mentioned. The modified polyethylene is not particularly limited, and various known ones can be used. For example, ethylene- (meth) acrylic acid copolymer, ethylene- (meth)
Methyl acrylate copolymer, ethylene-ethyl (meth) acrylate copolymer, ethylene-vinyl acetate copolymer,
Examples include maleic anhydride-modified polyethylene, carboxylic acid-modified polyethylene, and the like. The polypropylene resin used in the present invention is not particularly limited, and various known resins can be used. Examples thereof include polypropylene and modified polypropylene. The modified polypropylene resin is not particularly limited, and various known ones can be used, and examples thereof include elastomeric resins such as an ethylene-propylene copolymer and an ethylene-propylene-diene copolymer.

The polystyrene resin used in the present invention is not particularly limited, and various known resins can be used. Examples thereof include styrene, α-substituted styrene such as α-methylstyrene, and styrene such as vinyltoluene. Derivative polymers are mentioned. Further, these monomers are mainly used, and copolymerizable monomers such as acrylonitrile, butadiene, isoprene and the like may be used. Specifically, styrene-acrylonitrile copolymer ( AS resin), styrene-butadiene random copolymer, ABS resin, styrene-butadiene-
Styrene block copolymer (SBS resin), styrene-
Isoprene-styrene block copolymer (SIS resin)
And the like.

The polyphenylene ether-based resin used in the present invention is not particularly limited, and various known ones can be used.
1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, poly (2,6-dipropyl-1,4-phenylene) ether, poly (2-
Methyl-6-ethyl-1,4-phenylene) ether,
Poly (2-methyl-6-propyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1,
4-phenylene) ether, (2,6-dimethyl-1,
A copolymer of (4-phenylene) ether and (2,3,6-trimethyl-1,4-phenylene) ether;
6-diethyl-1,4-phenylene) ether and (2,
Copolymer with 3,6-trimethyl-1,4-phenylene) ether, (2,6-dimethyl-1,4-phenylene) ether and (2,3,6-triethyl-1,4-phenylene) ether And the above polyphenylene ether-based resin modified with polystyrene at various styrene ratios.

In addition, the above polycarbonates; polyesters such as polyethylene terephthalate and polybutylene terephthalate; and resins such as polyphenylene sulfide are also used to improve the impact resistance, heat resistance and chemical resistance, because of the polyolefin resin, polystyrene resin and polyphenylene ether. It can be preferably blended with at least one resin selected from the group consisting of resin-based resins, especially modified polystyrene resin.

[0011] The phenolic starch resin of the present invention (B)
Is used in combination with the phosphorus compound (C) described below,
It has the function and function of imparting flame retardancy to the thermoplastic resin (A) obtained by blending it as a flame retardant. That is, the phenol-starch resin (B) of the present invention has an action and a function as a flame retardant aid capable of forming a flame retardant in combination with the phosphorus compound (C). Phenol
Various known resins can be used as the starch resin (B). For example, phenol-starch resins are phenols 1
The reactor was charged with a mixing ratio of 0.1 to 3 mol parts of starch (the lower limit is preferably 0.3 mol parts, and the upper limit is preferably 2 mol parts), and the catalyst was added. Thereafter, the mixture is heated and subjected to a reaction for about 1 to 6 hours, preferably about 4 hours while distilling off water and neutralized, and then vacuum distillation is performed to remove remaining water and unreacted phenols. (Mudde, JP, M
od.Plastics 57, (2) 69, 1980). Alternatively, the molar ratio of aldehyde compound / starch / phenol is 0.1 to 3 /
0.1 to 3/1, preferably 0.3 to 2 / 0.3 to 2 /
The reaction mixture was charged into the reaction vessel at a mixing ratio of 1 and heated after adding the catalyst. After neutralization by reacting under reflux conditions for 1 to 5 hours, preferably about 3 hours, water and unreacted phenols were removed. It can also be obtained by a method of performing vacuum distillation for removal (Koch, H. et al. Starch / Starke (35) 30).
4 (1983)). The catalyst used here is not particularly limited, and various commercially available catalysts can be used. For example, oxalic acid, hydrochloric acid, sulfuric acid, acetic acid, phosphoric acid, nitric acid, toluenesulfonic acid and the like can be mentioned. Also,
The phenols used here are not particularly limited, and include various known phenols. For example, phenol, cresol, xylenol, ethylphenol, propylphenol, butylphenol, amylphenol, nonylphenol, phenylphenol, phenylphenolether, phenoxyphenol, styrenated phenol, hydroquinone, resorcinol, dihydroxydiphenylether, dihydroxydiphenyl, bis (hydroxyphenyl) Butane, dihydroxydiphenylsulfone, dihydroxydiphenylketone,
Examples include dihydroxydiphenylmethane, bis (hydroxyphenyl) propane, methylenebis (ethyl tert-butylcresol) and mixtures thereof. The starch used here is not particularly limited, and various known ones can be used. For example, corn, potato, tapioca, wheat, oats and other starches, or soluble starch obtained by the action of a dilute inorganic acid or organic acid on various starches, heat or acid and alkali or heat and heat to various starches Dextrin obtained by altering in combination and a mixture thereof. The aldehyde compound used here is not particularly limited, and various known aldehyde compounds can be used. Examples thereof include aliphatic aldehydes such as formaldehyde, acetaldehyde, propyl aldehyde, and butyraldehyde; aromatic aldehydes such as benzaldehyde, p-hydroxybenzaldehyde, and salicylaldehyde; polyhydric aldehydes such as glyoxal and terephthalaldehyde; and mixtures thereof.

The phenol-starch resin (B) is
The amount is preferably 0.5 to 100 parts by weight, more preferably 50 parts by weight or less, particularly preferably 10 parts by weight or less based on 100 parts by weight of the thermoplastic resin (A). If the phenol-starch resin (B) is less than 5 parts by weight, the effect of improving flame retardancy tends to decrease, and
When the amount is more than the weight part, other properties tend to deteriorate.

In the present invention, the phosphorus compound (C) is essential. By using the phosphorus-based compound (C) in combination with the phenol-starch resin (B), a remarkable flame-retardant effect can be obtained in the thermoplastic resin (A) in which these are blended as a flame retardant. The phosphorus compound (C) is not particularly limited, and various known compounds can be used. Among them, at least one selected from the group consisting of red phosphorus, phosphate ester and melamine phosphate
Species are preferred. The red phosphorus used in the present invention is not particularly limited, and various known ones can be used. For example, embodiments of commercially available red phosphorus include red phosphorus surface-treated with a synthetic resin such as red phosphorus microencapsulated with a thermosetting resin such as a phenol resin; Master batch and the like can be mentioned. Further, the phosphate ester used in the present invention is not particularly limited, and various known ones can be used. For example, trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tricyclohexyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, trioleyl phosphate, triphenyl phosphate, tricrephosphate Zyl phosphate, trixylenyl phosphate, dimethylethyl phosphate, methyldibutylphosphate, ethyldipropylphosphate, hydroxyphenyldiphenylphosphate, tris (isopropylphenyl) phosphate, tris (o-phenylphenyl) phosphate, tris (p-phenylphenyl) phosphate , Trinaphthyl phosphate, cresyl dif Nyl phosphate, xylenyl diphenyl phosphate, diphenyl (2-ethylhexyl) phosphate, di (isopropylphenyl) phenyl phosphate, o-phenylphenyl dicresyl phosphate, dibutyl phosphate, monobutyl phosphate, di-2-ethylhexyl phosphate, monoisodecyl Phosphate, 2-acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl-2-
Acryloyloxyethyl phosphate, diphenyl-
Examples include 2-methacryloyloxyethyl phosphate and condensates thereof. Furthermore, the melamine phosphate used in the present invention is not particularly limited, and various known melamine phosphates can be used. For example, MPP-
A (manufactured by Sanwa Chemical Co., Ltd.) and P-7202 (manufactured by Sanwa Chemical Co., Ltd.).

The above-mentioned phosphorus compounds (C) can be used alone or in combination of two or more kinds, preferably 0.5 to 50 parts by weight, more preferably 10 parts by weight, based on 100 parts by weight of the thermoplastic resin. Parts by weight or less, particularly preferably 5 parts by weight or less. Phosphorus compound (C)
If it is less than 0.5 part by weight, the effect of improving flame retardancy tends to decrease, and if it exceeds 50 parts by weight, other properties tend to decrease.

The inorganic hydrate (D) of the present invention is added for further improving the flame retardancy, and is not particularly limited, and various known ones can be used. For example, magnesium hydroxide, aluminum hydroxide, calcium hydroxide and the like can be mentioned. The inorganic hydrate (D) is used in an amount of 0 to 200 parts by weight based on 100 parts by weight of the thermoplastic resin (A).
Preferably, it is added in an amount of 10 parts by weight or more. In particular, when the thermoplastic resin (A) is a polyolefin resin such as polyethylene or polypropylene, the inorganic hydrate (D) is 1
If the amount is less than 0 parts by weight, the effect of improving flame retardancy tends to decrease.

Further, in the present invention, a substituted or unsubstituted phenol resin such as novolak or resol used in a known flame-retardant resin composition; a phosphorus-containing polyphenol or the like, as long as the effects of the present invention are not impaired. Modified polyphenols such as boron-containing polyphenols; boron-containing compounds such as boric acid and zinc borate; nitrogen-containing compounds such as melamine and derivatives thereof; organosiloxanes such as silicone oil and silicone resin; aluminum silicate; sodium silicate; Silicon-containing compounds such as silicon; antimony-containing compounds such as antimony trioxide, antimony tetroxide, (colloidal) antimony pentoxide, sodium antimonate, and antimony phosphate can be blended.

Further, in the present invention, various fillers, additives and the like can be blended as needed within a range not to impair the flame retardancy. Illustrative examples thereof include fluorine resin, asbestos, glass fiber, carbon fiber, ceramic fiber, metal fiber, aromatic polyamide fiber, potassium titanate whisker fiber, fibrous filler such as boron whisker fiber, mica, silica, Talc, clay, calcium carbonate, wallas night, glass beads, glass balloon,
Fillers such as glass flakes, lubricants, release agents, plasticizers,
Examples include light stabilizers, ultraviolet absorbers, antioxidants, heat stabilizers, antioxidants, and additives such as dyes and pigments. In addition, an impact strength improver, a compatibilizing component, and the like can be added.

The flame-retardant resin composition of the present invention comprises a thermoplastic resin (A) and a phenol-starch resin (B), a phosphorus compound (C) and, if necessary, an inorganic hydrate (D). It is. As a specific compounding method,
A method in which a mixture or a melt-kneaded product of a phenol-starch resin (B), a phosphorus-based compound (C) and, if necessary, an inorganic hydrate (D) is blended with the thermoplastic resin (A) and melt-kneaded. . When melt kneading, use various extruders, Banbury mixers, kneaders, rolls, etc.
Each component such as (A) to (D) is kneaded in the range of 50 ° C to 300 ° C. Each component can be kneaded at once,
Also, after kneading any components, the remaining components can be added and kneaded. Further, a preferable kneading method is a method using an extruder, and as the extruder, a biaxial co-rotating extruder is particularly preferable.

[0019]

EXAMPLES Hereinafter, the present invention will be described in more detail by way of examples, but these are merely examples, and the present invention is not limited thereto.

Synthesis Example 1 (Synthesis of phenol-starch resin) In a separable flask equipped with an air-cooled tube, a nitrogen inlet tube, a thermometer and a stirrer, 141.2 g of phenol, 135.1 g of starch and 4.59 g of 20% sulfuric acid were placed. And stirred. The temperature was raised to 100 ° C., and the temperature was raised to 160 ° C. over 2 hours while distilling off water. The reaction was maintained at this temperature for 2 hours, and sodium hydroxide dissolved in 3.75 g of water was added. 75 g was added for neutralization. After this, 10mm
The reaction mixture was distilled under reduced pressure of Hg until the temperature of the reaction mixture reached 180 ° C. to remove water and unreacted phenol. Thereafter, the reaction mixture was taken out into a vat, cooled and pulverized to obtain a phenol-starch resin.

Synthesis Example 2 (Synthesis of phenol-starch resin) In a separable flask equipped with a reflux condenser, a nitrogen inlet tube, a thermometer and a stirrer, 141.2 g of phenol, 48.6 g of formaldehyde, 108.2 g of starch and 14.9 g of 20% sulfuric acid was charged and stirred. This is 10
After the temperature was raised to 0 ° C. and the reaction was carried out under reflux conditions for 4 hours, sodium hydroxide dissolved in 20 g of water was added for neutralization. Thereafter, the temperature of the reaction product was reduced to 180 ° C. under a reduced pressure of 10 mmHg.
To remove water and unreacted phenol.
Thereafter, the reaction mixture was taken out into a vat, cooled and pulverized to obtain a phenol-starch resin.

Example 1 100 parts by weight of ABS resin (registered trademark Psycolac LE, manufactured by Ube Sicon Co., Ltd.), red phosphorus microparticles microencapsulated with a synthetic resin (trade name: Novaled # 12)
0, Rin Kagaku Kogyo Co., Ltd.) and 6.7 parts by weight of the phenol-starch resin synthesized in Synthesis Example 1, and kneaded with a roll at 190 ° C. to obtain a kneaded product (flame-retardant resin composition). Product). The kneaded material is heated and pressed at 200 ° C,
A sheet having a thickness of 1.6 mm (1/16 inch) was obtained. A test piece having a width of 12.7 mm was cut out from this sheet and subjected to a flame retardancy test according to the standard of UL-94 in the United States. Table 1 shows the results.

Example 2 Polypropylene resin (hereinafter referred to as PP resin; trade name: J-Aroma SA510, Nippon Polyolefin Co., Ltd.)
100 parts by weight), 1.5 parts by weight of red phosphorus microparticles (trade name: Nova Red # 120, manufactured by Rin Kagaku Kogyo KK) microencapsulated with a synthetic resin, phenol-starch resin 6 synthesized in Synthesis Example 1 0.7 parts by weight and 100 parts by weight of aluminum hydroxide were blended, a test piece was prepared in the same manner as in Example 1, and the same combustion test was performed. Table 1 shows the results.

Example 3 100 parts by weight of a polyethylene resin (hereinafter referred to as PE resin, trade name Petrocene 202, manufactured by Tosoh Corporation), and red phosphorus microparticles microcapsulated with a synthetic resin (trade name: Nova Red # 120; (Rin Chemical Industry Co., Ltd.)
5 parts by weight, 6.7 parts by weight of the phenol-starch resin synthesized in Synthesis Example 1, and 100 parts by weight of aluminum hydroxide were blended, a test piece was prepared in the same manner as in Example 1, and the same combustion test was performed. . Table 2 shows the results.

Example 4 Polyphenylene ether resin (hereinafter referred to as PPE resin; trade name: Zylon X0061, manufactured by Asahi Kasei Corporation)
100 parts by weight, 1.5 parts by weight of red phosphorus microparticles (trade name: Nova Red # 120, manufactured by Rin Kagaku Kogyo KK) microencapsulated with a synthetic resin, phenol-starch resin synthesized in Synthesis Example 1 6.7 By weight, a test piece was prepared in the same manner as in Example 1, and a similar combustion test was performed.
Table 2 shows the results.

Example 5 A test piece was prepared in the same manner as in Example 1 except that the phenol-starch resin synthesized in Synthesis Example 2 was used instead of the phenol-starch resin synthesized in Synthesis Example 1. And a similar combustion test was performed. Table 3 shows the results.

Example 6 A test piece was prepared in the same manner as in Example 2 except that the phenol-starch resin synthesized in Synthesis Example 2 was used instead of the phenol-starch resin synthesized in Synthesis Example 1. And a similar combustion test was performed. Table 3 shows the results.

Example 7 A test piece was prepared in the same manner as in Example 3 except that the phenol-starch resin synthesized in Synthesis Example 2 was used instead of the phenol-starch resin synthesized in Synthesis Example 1. And a similar combustion test was performed. Table 4 shows the results.

Example 8 A test piece was prepared in the same manner as in Example 4 except that the phenol-starch resin synthesized in Synthesis Example 2 was used instead of the phenol-starch resin synthesized in Synthesis Example 1. And a similar combustion test was performed. Table 4 shows the results.

Comparative Example 1 A test piece was prepared in the same manner as in Example 1 except that the phenol-starch resin synthesized in Synthesis Example 1 was not used, and a similar combustion test was performed. Table 1 shows the results.

Comparative Example 2 In Example 1, a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used in place of the phenol-starch resin synthesized in Synthesis Example 1. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 1 shows the results.

Comparative Example 3 Example 2 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used in place of the phenol-starch resin synthesized in Synthesis Example 1. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 1 shows the results.

Comparative Example 4 Example 3 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used in place of the phenol-starch resin synthesized in Synthesis Example 1. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 2 shows the results.

Comparative Example 5 Example 4 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industries, Ltd.) was used in place of the phenol-starch resin synthesized in Synthesis Example 1. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 2 shows the results.

Comparative Example 6 Example 5 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used instead of the phenol-starch resin synthesized in Synthesis Example 2. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 3 shows the results.

Comparative Example 7 Example 6 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used instead of the phenol-starch resin synthesized in Synthesis Example 2. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 3 shows the results.

Comparative Example 8 Example 7 was repeated, except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industry Co., Ltd.) was used in place of the phenol-starch resin synthesized in Synthesis Example 2. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 4 shows the results.

Comparative Example 9 Example 8 was repeated except that a phenol novolak resin (trade name: Tamanol 759, manufactured by Arakawa Chemical Industries, Ltd.) was used instead of the phenol-starch resin synthesized in Synthesis Example 2. A test piece was prepared in the same manner as described above, and a similar combustion test was performed. Table 4 shows the results.

[0039]

[Table 1]

[0040]

[Table 2]

[0041]

[Table 3]

[0042]

[Table 4]

In the UL-94 standard, V-0
Indicates that after 10 seconds of indirect flame on the specimen, the framing or glowing on one specimen is within 10 seconds, and the total of the five specimens is within 50 seconds, and the surgical cotton 12 inches below the framing granules V-1 indicates that the flaming or glowing on one test piece was within 30 seconds after the indirect flame was applied to the test piece for 10 seconds, and the total of the five test pieces was within 250 seconds. Indicates that the surgical cotton 12 inches below does not burn in the framing granules, and V-2 is the same as V-1, but the surgical cotton 12 inches below the framing granules. Indicates a burning state.

[0044]

The flame-retardant resin composition of the present invention comprises a phenol-starch resin and a phosphorus-based compound instead of a conventional phenol novolak resin or a phosphorus-based compound. Since it is used, it is a resin composition having excellent flame retardancy. Since the flame-retardant resin composition of the present invention has flame retardancy, it is particularly suitable as a molded product used for household goods, electric products, OA equipment, products such as automobiles, or building materials.

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Claims (11)

[Claims] 1. A flame-retardant resin composition comprising a phenol-starch resin (B) and a phosphorus compound (C) mixed with a thermoplastic resin (A). 2. A phenol-starch resin (B) 0.5 to 100 parts by weight and a phosphorus compound (C) 0.5 to 50 parts by weight are blended with 100 parts by weight of the thermoplastic resin (A). A flame-retardant resin composition comprising: 3. A thermoplastic resin (A) mixed with a mixture or melt-kneaded product of a phenol-starch resin (B) and a phosphorus compound (C) and melt-kneaded. 3. The flame-retardant resin composition according to 1 or 2. 4. The flame retardant according to claim 1, wherein the thermoplastic resin (A) is at least one selected from the group consisting of a polyolefin resin, a polystyrene resin, and a polyphenylene ether resin. Resin composition. 5. The flame-retardant resin composition according to claim 1, wherein the phosphorus compound (C) is at least one selected from the group consisting of red phosphorus, a phosphate ester and melamine phosphate. object. 6. The method according to claim 1, wherein 0 to 200 parts by weight of the inorganic hydrate (D) is further added to 100 parts by weight of the thermoplastic resin (A). Flammable resin composition. 7. The flame-retardant resin composition according to claim 6, wherein the inorganic hydrate (D) is at least one selected from the group consisting of magnesium hydroxide, aluminum hydroxide and calcium hydroxide. 8. A thermoplastic resin (A) comprising a mixture or a melt-kneaded mixture of a phenol-starch resin (B) and a phosphorus compound (C), and melt-kneaded. 6. The method for producing a flame-retardant resin composition according to any one of 1 to 5. 9. A mixture or a melt-kneaded product of a phenol-starch resin (B), a phosphorus compound (C) and an inorganic hydrate (D) is blended with the thermoplastic resin (A), and the mixture is melt-kneaded. The method for producing a flame-retardant resin composition according to claim 6 or 7, wherein: 10. A flame retardant for thermoplastic resin comprising a phenol-starch resin (B) and a phosphorus compound (C). 11. A flame retardant auxiliary for a thermoplastic resin comprising a phenol-starch resin (B).