JP3374552B2 - Polyester resin composition - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a polyester resin composition. More particularly, it relates to a polyester resin composition flame-retarded with a halogen-free flame retardant.

[0002]

2. Description of the Related Art Conventionally, polyester resins have been widely used in automobile parts, household electric appliances parts, office parts, industrial parts, textile products, construction materials, miscellaneous goods, etc. Not only excellent mechanical properties but also materials exhibiting flame retardancy are required.

As a flame retardant for making a thermoplastic resin flame-retardant, various inorganic flame retardants and organic flame retardants are known. For flame retarding a polyester resin, halogen has conventionally been used in the molecule. Organic flame retardants containing atoms are widely used. However, polyester resins using halogen-based organic flame retardants are hydrogen halides that are decomposed and generated by the heat during molding, and corrode or contaminate the molding machine, molding die, etc. used during molding processing, or when burning. It has many drawbacks such as generation of a large amount of black smoke and toxic halogen-containing gas, and bleeding out of the flame retardant from the surface of the molded product. Further, there is also a report pointing out the risk of generation of dioxin as a thermal decomposition product of a halogen compound, and the use of the halogen compound is being suppressed.

[0004] In order to overcome the drawbacks of the above halogen-based organic flame retardants, so-called non-halogen flame retardants containing no halogen have been conventionally known. As specific examples of non-halogen flame retardants, hydrous inorganic compounds such as magnesium hydroxide and aluminum hydroxide are known, but in order to exert sufficient flame retardancy with these non-halogen flame retardants, the base resin However, there is a drawback in that a large amount needs to be added, resulting in a marked decrease in mechanical properties.
A method of using a phosphoric acid compound as a flame retardant in addition to these hydrous inorganic compounds is also disclosed in, for example, JP-A-47-188.
4, Japanese Patent Publication No. 51-39271, Japanese Patent Publication No. 55
No. 50506, Japanese Patent Publication No. 63-65700, etc.

However, none of these have sufficient flame retardancy when blended with the base resin, and if the main emphasis is on improving the flame retardancy of the base resin, the generation of decomposed gas, smoke generation, and It has a drawback that the resin composition is inferior in mechanical properties, electrical properties, economical efficiency and the like. Also,
For example, a method of adding a polyhydric alcohol such as pentaerythritol to a phosphoric acid-based flame retardant as described in JP-B-61-47875 is also known, but it does not necessarily exhibit sufficient flame retardancy. There has been a demand for a resin composition which is not obtained and has significantly improved flame retardancy.

[0006]

An object of the present invention is to provide a polyester resin composition flame-retarded with a halogen-free flame retardant, which does not generate a corrosive gas at the time of molding process, No contamination, no bleed-out from the surface of the molded product, little generation of irritating gas, corrosive gas, and black smoke when burning, and excellent flame retardance even if the amount of flame retardant added is smaller than before. And to provide a flame-retardant polyester resin composition exhibiting mechanical properties.

[0007]

In order to solve the above problems, in the invention according to claim 1 of the present invention, 100 parts by weight of the polyester resin is added to the component (A);
40 parts by weight and component (B); one or more structures represented by the following general formula (1) in the molecule

[0008]

[Chemical 6]

(In the formula (1), R ¹ and R ² are H,
Phosphoryl group, an alkyl group, an aryl group, an alkylcarbonyl group or an aryl group, aralkyl kill group, an aryl group, an alkylcarbonyl group and an arylcarbonyl group comprising 20 or less carbon atoms, R ¹ and R ^2, together They may combine to form a ring. ), The total concentration of —OR ¹ groups and —OR ² groups in the compound is 1.0 ×
Compounds of 10 ^-3 equivalent / g or more

[0010]

A polyester resin composition containing 0.1 to 2 parts by weight is used.

The present invention will be described in detail below. In the present invention, the polyester resin means at least one type of 2
A thermoplastic polyester having an intrinsic viscosity of at least 0.40 or more, which is obtained by polycondensation of a functional carboxylic acid component and at least one glycol component or an oxycarboxylic acid. Further, any copolymer may be used as long as 70 mol% or more of all acid components or all diol components forming the polyester are single components. Further, a mixture of 60% by weight or more of such a polyester resin and 40% by weight or less of another thermoplastic resin may be used.

Specific examples of the bifunctional carboxylic acid component include terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, P,
Examples thereof include P'-diphenyldicarboxylic acid, P, P'-diphenyletherdicarboxylic acid, adipic acid, sebacic acid, dodecanedioic acid, suberic acid, azelaic acid, 5-sodiumsulfoisophthalic acid, and ester-forming derivatives thereof.

Specific examples of the glycol component include α, ω-alkylene glycol, neopentyl glycol and 1,4-cyclohexanediol represented by the general formula HO (CH ₂ ) _n OH (n is an integer of 2 to 20). , 1,4
-Cyclohexanedimethanol, bisphenol A, polyoxyethylene glycol, polyoxytetramethylene glycol, or ester-forming derivatives thereof, and specific examples of the oxycarboxylic acid include oxybenzoic acid and 4- (2-hydroxyethoxy). )benzoic acid,
Alternatively, ester-forming derivatives thereof and the like can be mentioned.

The polyester resin composition according to the present invention is
It is essential to include the component (A) and the component (B). The component (A) is a phosphoric acid-based flame retardant and refers to a compound having a phosphoric acid structure, a phosphonic acid structure, a phosphorous acid structure and / or a polyphosphoric acid structure, or a mixture containing these components. Specific examples thereof include ammonium phosphate, phosphate amide, ammonium pyrophosphate, pyrophosphate amide, ammonium polyphosphate, polyphosphate amide, trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl. Examples thereof include phosphate, tricresyl phosphate, cresyl diphenyl phosphate, octyl diphenyl phosphate, dimethyl methyl phosphonate, triphenyl phosphite, etc. Among them, those containing a nitrogen atom are preferable, and polyphosphoric acid amide is particularly preferable.

As an example of polyphosphoric acid amide, Japanese Patent Publication No.
It is disclosed in JP-A 1-48659, and is preferably obtained by a condensation reaction of ammonium polyphosphate and melamine, and Sumishafu PM (trade name, manufactured by Sumitomo Chemical Co., Ltd.), Hostaflam AP462 (Exoli).
t462), those commercially available as Hostaflam AP745 (trade name, all manufactured by Hoechst) can be used as they are.

The addition amount of the phosphoric acid flame retardant as the component (A) is
The amount is 5 to 40 parts by weight, especially 8 to 30 parts by weight, based on 100 parts by weight of polyester. If the addition amount of the phosphoric acid-based flame retardant is less than 5 parts by weight, the flame retardancy becomes insufficient, and 4
If the amount exceeds 0 parts by weight, the physical properties of the polymer are remarkably deteriorated, which is not preferable.

As the component (B) of the present invention, 1 in the molecule
A structure in which a hydroxyl group or a group derived from a hydroxyl group is bonded to each of the adjacent carbon atoms represented by the following general formula (1)

[0019]

[Chemical 8]

## STR3 ## and has --OR ¹ group and --OR ² in the compound.
And a compound having a total concentration of 1.0 × 10 ⁻³ equivalent / g or more, and / or one or more of the following general formula (2) in the molecule:
Structure of epoxy group represented by

[0021]

[Chemical 9]

A compound having a concentration of epoxy groups in the compound of 0.5 × 10 ⁻³ equivalent / g or more is used. In the general formula (1), R ¹ and R ² each represent H, a phosphoryl group, an alkyl group, an aryl group, an alkylcarbonyl group or an arylcarbonyl group, and an alkyl group, an aryl group, an alkylcarbonyl group and an arylcarbonyl group. Has 20 or less carbon atoms, and R ¹ and R ² may combine with each other to form a ring. Above all, R ¹ and R ² are
Each is preferably H. -O in the above compound
The total concentration of the R ¹ group and -OR ² group, the weight of the compound to the total number N ₁ of -OR ¹ and -OR ² group in the compound of chromatic of ¹ group and the -OR ² group -OR W It is a number divided by ₁ and is calculated based on the following formula.

[0023]

## EQU1 ## N ₁ = [(-OR ¹ group) + (-OR ² group)] Total concentration of -OR ¹ group and -OR ² group = N ₁ / W ₁
(Equivalent / g)

The total concentration of —OR ¹ group and —OR ² group is 1.0 × 10 ⁻³ equivalent / g or more, preferably 5.0 × 10 ⁻³ equivalent from the viewpoint of flame retardant effect. / G or more, more preferably 10 × 10 ⁻³ equivalent / g or more. The concentration of epoxy groups in the above compound is a value obtained by dividing the total number N ₂ of epoxy groups in a compound having an epoxy group by the weight W ₂ of the compound, and is calculated based on the following formula.

[0025]

[Equation 2] Concentration of epoxy group = N ₂ / W ₂ (equivalent / g)

The concentration of the epoxy group is 0.5 × 10 ⁻³ equivalent / g or more, preferably 1.0 from the viewpoint of the flame retardant effect.
× 10 ^-3 equivalent / g or more, more preferably 3.0 × 10 ^-3
It is equivalent / g or more. The component (B) has one or more structures represented by the general formula (1) in its molecule, and the total concentration of —OR ¹ group and —OR ² group in the compound is 1.0 × 10 5.
^As the compound having ^-3 equivalent / g or more, preferably, the total concentration of -OR ¹ group and -OR ² group in the compound represented by the following general formula (3) is 1.0 x 10 ^-3. Equivalent / g or more, or a compound having a structure represented by the general formula (1) in the molecule, and the total concentration of —OR ¹ group and —OR ² group in the compound is 1.0 × 10 ^−3. An example is a polymer compound having an equivalent weight / g or more.

[0027]

[Chemical 10]

In the general formula (3), R¹ And R² Respectively
H, phosphoryl group, alkyl group, aryl group, alkyl
A carbonyl group or an arylcarbonyl group,
Group, aryl group, alkylcarbonyl group and aryl
The carbonyl group has 20 or less carbon atoms and R¹ And R² 
May combine with each other to form a ring. Above all, R
¹ And R² Are each preferably H. R³ When
R^Four Are H or an alkyl group having 3 or less carbon atoms, respectively.
Show. Above all, R³ And R^Four Is preferably H
Good R^Five And R⁶ Are H, alkyl group, and
Alkyl group, aryl group, alkoxy group or aryl
Oxy group, alkyl group, cycloalkyl group, ari
Group, alkoxy group and aryloxy group have a substituent
May have R^Five And R⁶ Are linked together to form a ring
It may be formed. Substituents include hydroxyl group, ether
Group, epoxy group, carboxyl group, carbonyl group,
Examples thereof include a stell group and an amino group. R^Five And R⁶ Is that
Each is H or an alkyl group having a substituent
And further preferably a hydroxyl group or an epoxy group, vinyl
An alkyl group substituted with a group, an allyl group or the like is preferable.

Represented by the general formula (3), -O in the compound
Specific examples of the compound having a total concentration of R ¹ groups and —OR ² groups of 1.0 × 10 ⁻³ equivalent / g include glycerin and
1,2,3-trimethoxypropane, 1,2-butanediol, 1,2,3-butanetriol, 1,2,4-
Linear polyhydric alcohols such as butanetriol, erythritol, ribitol, xylitol, dulcitol, sorbitol, 2,3-dihydroxytetrahydrofuran, 1,2-cyclohexanediol, cyclic polyhydric alcohols such as inositol, glucose, galactose, mannose, galatulon. Acid, xylose, glucosamine,
Examples include sugars such as galactosamine and isopropylidene glucose. Among them, linear polyhydric alcohols are preferable, and linear polyhydric alcohols having 4 or more carbon atoms such as erythritol and sorbitol are particularly preferable.

The polymer has a structure represented by the general formula (1), and the total concentration of the —OR ¹ group and the —OR ² group in the polymer compound is 1.0 × 10 ⁻³ equivalent / g or more. Examples of the polymer compound that can be used include polysaccharides, polyethylene glycol, polyglycerin, and the like. As a polysaccharide,
Polymers of the above-mentioned saccharides are used, and examples thereof include cellulose, amylose, amylopectin, xylan, curdlan, and the like. Glyose polymers such as cellulose, amylose, and amylopectin are particularly preferable, and cellulose is particularly preferable.

The component (B) has a structure of one or more epoxy groups represented by the general formula (2) in the molecule, and the concentration of the epoxy groups in the compound is 0.5 × 10 ^-3 equivalent / The compound of g or more is preferably represented by the following general formula (4), and the concentration of the epoxy group in the compound is 0.5 × 10 ^−3.
Equivalent / g or more of the compound.

[0032]

[Chemical 11]

In the general formula (4), R ⁷ and R ⁸ each represent H or an alkyl group having 3 or less carbon atoms, and among them, H is preferable. R ⁹ and R ¹⁰ each represent H, an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group or an aryloxy group, and the alkyl group, the cycloalkyl group, the aryl group, the alkoxy group and the aryloxy group each have a substituent. You may have. R ⁹ and R ¹⁰ may combine with each other to form a ring. Examples of the substituent include a hydroxyl group, an ether group, an epoxy group, a carboxyl group, a carbonyl group, an ester group and an amino group. As the compound represented by the general formula (4), in which the concentration of the epoxy group in the compound is 0.5 × 10 ⁻³ equivalent / g or more,
A compound represented by the following general formula (5) is preferable.

[0034]

[Chemical 12]

In the general formula (5), R ⁹ represents an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group or an aryloxy group, which may have a substituent.
Examples of the substituent include a hydroxyl group, an ether group, an epoxy group, a carboxyl group, a carbonyl group, an ester group and an amino group. Specific examples of the compound represented by the general formula (5) in which the concentration of the epoxy group in the compound is 0.5 × 10 ⁻³ equivalent / g or more include methyl glycidyl ether, butyl glycidyl ether, phenyl glycidyl ether, and benzyl. Glycidyl ethers, alkyl or aryl glycidyl ethers such as bisglycidyl bisphenol A, allyl glycidyl ethers, glycidyl methacrylates, epoxy compounds having a double bond in the molecule, carboxylic acid glycidyl esters such as diglycidyl terephthalate, and the like. Those having a plurality of epoxy groups therein are preferable.

The content of the component (B) is 0.1 to 2 parts by weight, preferably 0.3 to 2 parts by weight, based on 100 parts by weight of the polyester resin, of which 0.5 to 1.5 parts are included. Is particularly preferable. When the content is less than 0.1 parts by weight, sufficient flame retardancy is not exhibited, and when it exceeds 2 parts by weight, physical properties of the polymer are deteriorated and coloring occurs, which is not preferable.

The polyester resin composition according to the present invention is
It is essential to include the component (A) and the component (B), but in addition to these, various kinds of resin additives which do not adversely affect the physical properties of the polyester resin composition may be contained in an appropriate range. it can. Examples of resin additives include heat stabilizers, light stabilizers, ultraviolet absorbers, antioxidants, antistatic agents, preservatives, adhesion promoters, colorants, crystallization promoters, fillers, glass fibers, carbon fibers. , Foaming agents, lubricants, bactericides, plasticizers, release agents, thickeners, drip-proof agents, impact modifiers, smoke suppressants and the like.

In order to prepare the polyester resin composition according to the present invention, the base resin, the component (A), the component (B) and, if necessary, the resin additive are weighed in predetermined amounts, respectively, and it has been conventionally known. Examples of the mixing method include a dry blending method using a blender and a mixer, and a melt mixing method using a kneader such as an extruder and a kneader.
Usually, a method of melt mixing using a screw extruder, extruding into a strand shape, and pelletizing is adopted.

The polyester resin composition of the present invention is produced by various molding methods such as injection molding, extrusion molding and compression molding.
It can be easily molded into a molded article of the desired product, for example, automobile parts, household electric appliances parts, office parts, industrial parts, textile products, building materials, sundries and the like.

[0040]

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to these examples unless it exceeds the gist thereof. In addition, "part" in an Example shows a "weight part." In the following examples, the resin composition was evaluated by the method described below. <Flame Retardancy> (1) UL94: Underwriters Laboratory (Un
derwriter's Laboratories Inc.) was evaluated according to the UL-94 standard vertical combustion test method, and the degree of flame retardancy was displayed. (2) LOI: The size created by the injection molding method is 6.
JIS K7 per 6 mm x 12.5 mm x 3 mm test piece
The limiting oxygen index was measured according to 201 and displayed as LOI. The larger the number, the harder it is to burn. <Colorability> With respect to the test piece for flame retardancy evaluation prepared by the injection molding method, the degree of coloring was visually observed to determine the degree of coloring.

[Example 1] 80 parts by weight of polybutylene terephthalate (manufactured by Mitsubishi Kasei Co., Ltd., trade name Novadur) having an intrinsic viscosity of 0.85, polyphosphoric acid amide (Sumitomo Chemical Co., Ltd., trade name Sumisafe PM) 20 parts by weight and 1 part by weight of erythritol were weighed and blended with a blender. The resulting blend is 30 mm
Using a φ-vent type twin-screw extruder, kneading was performed at a cylinder temperature of 250 ° C., and the mixture was extruded in a strand form to obtain pellets of a polyester resin composition. These pellets were made into a 0.8 ounce injection molding machine (J2 manufactured by Japan Steel Works Ltd.).
8SA type), the molding temperature machine cylinder temperature 25
A test piece for UL94 combustion test and a test piece for limit oxygen index test were molded at 0 ° C. and a mold temperature of 85 ° C. The flame retardancy (UL94, LOI) and colorability of the obtained test pieces were evaluated. The results are shown in Table-1.

Examples 2 to 4 The same as in Example 1 except that the ratios of polybutylene terephthalate, polyphosphoric acid amide and erythritol were changed to the ratios shown in Table 1 in the example described in Example 1. By the procedure, pellets were obtained. The obtained pellets were evaluated for flame retardancy and colorability as in Example 1. The results are shown in Table-1.

Example 5 In the example described in Example 1, erythritol was replaced with sorbitol, and pellets were prepared by the same procedure as in the same example, and the pellets were prepared in the same manner as in Example 1. The flammability and colorability were evaluated. The results are shown in Table-1. [Example 6] Pellets were prepared in the same manner as in Example 5 except that the ratios of polybutylene terephthalate, polyphosphoric acid amide and sorbitol were changed to the ratios shown in Table 1 in the example described in Example 5. The pellets were evaluated for flame retardancy and colorability in the same manner as in Example 1. The results are shown in Table-1.

Example 7 Pellets were prepared in the same manner as in Example 1 except that erythritol was replaced by cellulose in the example described in Example 1. The pellets obtained were slightly colored.
The pellets were evaluated for flame retardancy and colorability as in Example 1. The results are shown in Table-1 .

[0045]

[Chemical 13]

Example 8 In the example described in Example 1, 1 part by weight of erythritol and 1 part by weight of the epoxy compound represented by the above formula were used in combination instead of 1 part by weight of erythritol. Is a pellet in the same procedure as in the example, and for this pellet,
Flame retardancy and colorability were evaluated in the same manner as in Example 1.
The results are shown in Table-1. [ Example 9 ] The same procedure as in Example 1 except that ammonium polyphosphate (Sumitomo Chemical Co., Ltd., trade name Sumisafe P) was used in place of the polyphosphoric acid amide in the example described in Example 1. Then, pellets were prepared, and the flame retardancy and colorability of the pellets were evaluated in the same manner as in Example 1. The results are shown in Table-1.

Example 10 In the example described in Example 1, except that tricresyl phosphate was used instead of polyphosphoric acid amide, pellets were prepared in the same procedure as in the same example, and the pellets were prepared. Flame retardancy and colorability were evaluated as in Example 1. The results are shown in Table-1.

Comparative Example 1 Pellets were prepared in the same manner as in Example 1 except that the compounds corresponding to the components (A) and (B) were not added in the example described in Example 1. The pellets were evaluated for flame retardancy and colorability as in Example 1. The results are shown in Table-1. [Comparative Example 2] In the example described in Example 4, except that erythritol was not added, pellets were prepared in the same procedure as in the same example, and the pellets had the same flame retardancy and coloring property as in Example 1. Was evaluated. The results are shown in Table-1.

Comparative Example 3 Pellet erythritol was used in place of erythritol in the example described in Example 4, and pellets were prepared by the same procedure as in the same example.
The pellets were evaluated for flame retardancy and colorability in the same manner as in Example 1. The results are shown in Table-1. [Comparative Example 4] Pellets were prepared in the same manner as in Example 1 except that 1,4 butanediol was used instead of erythritol in the example described in Example 4, and the pellets were prepared in the same manner as in Example 1. The flame retardancy and colorability were evaluated. The results are shown in Table-1.

[Comparative Example 5] In the example described in Example 9 , pellets were prepared in the same procedure as in Example 1 except that erythritol was not added. And the colorability were evaluated. The results are shown in Table-1. [Comparative Example 6] In the example described in Example 10 , except that erythritol was not added, pellets were prepared in the same procedure as in the same example, and the pellets had the same flame retardancy and colorability as in Example 1. Was evaluated. The results are shown in Table-1.

Comparative Example 7 In the example described in Example 1, polybutylene terephthalate was 100 parts by weight,
Pellets were prepared by the same procedure as in the same example except that the polyphosphoric acid amide as the component (A) was not added, and the pellets were evaluated for flame retardancy and colorability as in Example 1. The results are shown in Table-1. [Comparative Example 8] In the example described in Example 1, except that the amount of cellulose added was changed to 3 parts by weight, a pellet was prepared in the same procedure as in the same example, and this pellet was treated in the same manner as in Example 1. The flammability and colorability were evaluated. Table of results
Shown in 1.

[0052]

[Table 1]

The following is clear from Table-1. (1) The polyester resin composition according to the present invention contains the component (A) and the component (B) in appropriate amounts in the base resin, so that the LOI is large and the severe conditions of UL-94 standard are satisfied. Meets and has excellent flame retardancy. Further, there is little coloring during molding (Examples 1 to 10 ). (2) On the other hand, the resin composition containing only the component (A) in the base resin and not containing the component (B) has a small LOI and does not satisfy the strict conditions of UL-94 standard,
Inferior in flame retardancy (Comparative example 2, Comparative example 5, Comparative example 6). Further, even if it contains a component similar to the component (B), if it does not satisfy the requirements specified in the present invention, the resin composition has a small LOI and meets the strict conditions of UL-94 standard. Not satisfied, and inferior in flame retardancy (Comparative Examples 3 and 4). Furthermore, the resin composition not containing the component (B) having specific properties has a small LOI and does not satisfy the strict conditions of the UL-94 standard (Comparative Example 1 and Comparative Example 7). The resin composition containing an appropriate amount or more is LO
I was small, did not meet the strict conditions of UL-94 standard, was inferior in flame retardance, and was easily colored during molding (Comparative Example 8).

[0054]

The present invention has the following advantageous effects,
Its industrial utility value is extremely high. 1. The polyester resin composition according to the present invention requires a non-halogen flame retardant and does not contain a halogen flame retardant, so that no harmful gas is generated during molding, therefore, there is no problem of corrosion of the molding machine and mold. Generates less irritating gas, corrosive gas, and black smoke when burning. 2. The polyester resin composition according to the present invention can exhibit excellent flame retardancy with a relatively small amount due to the synergistic action of the component (A) and the component (B),
Therefore, the mechanical properties are not significantly reduced.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI C08K 5/51 C08K 5/15

Claims (5)

(57) [Claims] 1. 100 parts by weight of a polyester resin, component (A); 5 to 40 parts by weight of a phosphoric acid flame retardant, and component (B); one or more structures represented by the following general formula (1) in the molecule. [Chemical 1] (In the formula (1), R ¹ and R ² each represent H, a phosphoryl group, an alkyl group, an aryl group, an alkylcarbonyl group or an arylcarbonyl group, and an alkyl group, an aryl group, an alkylcarbonyl group and an arylcarbonyl group respectively represent C 20 or less, R ¹ and R ² may combine with each other to form a ring), and —OR in the compound
The total concentration of ^one group and —OR ² group is 1.0 × 10 ⁻³ equivalent /
0.1 to 2 parts by weight of a compound having a weight of at least g, and a polyester resin composition. 2. The component (B) has one or more structures represented by the general formula (1) in the molecule, and the total concentration of —OR ¹ group and —OR ² group in the compound is 1.0. × 10 ^-3 equivalent / g
The above compound is represented by the following general formula (3), and the total concentration of the —OR ¹ group and the —OR ² group in the compound is 1.0.
The polyester resin composition according to claim 1 , which is a compound having a ^{concentration of} × 10 ^-3 equivalent / g or more. [Chemical 3] (In the formula (3), R ¹ and R ² each represent H, a phosphoryl group, an alkyl group, an aryl group, an alkylcarbonyl group or an arylcarbonyl group, and an alkyl group, an aryl group, an alkylcarbonyl group and an arylcarbonyl group respectively represent R ¹ and R ² may be bonded to each other to form a ring and have a carbon number of 20 or less, R ³ and R ⁴ are each H or an alkyl group having a carbon number of 3 or less, and R ⁵ and R ⁶ represents H, an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group or an aryloxy group, respectively, and an alkyl group,
The cycloalkyl group, aryl group, alkoxy group and aryloxy group may have a substituent, and R ⁵ and R
⁶ may combine with each other to form a ring. ) 3. The component (B) has at least one structure represented by the general formula (1) in the molecule, and the total concentration of —OR ¹ group and —OR ² group in the compound is 1.0. × 10 ^-3 equivalent / g
The above compound has a structure represented by the general formula (1), and the concentration of the total amount of —OR ¹ group and —OR ² group in the compound is 1.0 × 10 ⁻³ equivalent / g or more. The polyester resin composition according to claim 1 , which is a polymer compound. 4. The polyester resin composition according to claim 3 , wherein the polymer compound is a polysaccharide. 5. The phosphoric acid-based flame retardant of the component (A) is polyphosphoric acid amide, as claimed in any one of claims 1 to 3.
Item 5. The polyester resin composition according to any one of items 4 .