JP6233116B2 - Polyester resin composition and polyester resin molded body - Google Patents

Description

  The present invention relates to a polyester resin composition and a polyester resin molded body.

  Conventionally, various resin compositions have been provided and used for the production of various resin moldings. For example, Patent Document 1 contains rubber for 100 parts by weight of a polycarbonate resin containing a repeating unit derived from isosorbide and having a glass transition temperature of 145 to 165 ° C. and a 5% weight reduction temperature of 320 to 400 ° C. A resin composition containing 1 to 30 parts by weight of a polymer is proposed.

International Publication No. 2008/146719

  The subject of this invention is providing the polyester resin composition which is excellent in the impact resistance of a molded object, and transparency.

The above problem is solved by the following means. That is,
The invention according to claim 1
A polyester containing a polyethylene (terephthalate / isophthalate) copolymer having a copolymerization ratio (molar ratio) in the range of 99.5 / 0.5 to 98.2 / 1.8, and represented by the following general formula (1): A polyester resin composition comprising an isosorbide derivative.

In the general formula (1), R ¹ and R ² each independently represents a divalent group A alkylene group, an arylene group, or an alkylene group and an arylene group linked.

The invention according to claim 2
The polyester resin composition of Claim 1 whose weight average molecular weights of the said polyester are 20000 or more and 80000 or less .

The invention according to claim 3
The polyester resin composition of Claim 1 or Claim 2 whose mass ratio which occupies for the whole resin composition of the said polyester is 75 mass% or more and 99 mass% or less.

The invention according to claim 4
The polyester resin composition according to any one of claims 1 to 3, wherein a mass ratio of the isosorbide derivative to the entire resin composition is 1% by mass or more and 30% by mass or less.

The invention according to claim 5
The polyester resin composition according to any one of claims 1 to 5, further comprising at least one flame retardant selected from a phosphate ester and a sulfonic acid group-containing compound.

The invention according to claim 6
A polyester containing a polyethylene (terephthalate / isophthalate) copolymer having a copolymerization ratio (molar ratio) in the range of 99.5 / 0.5 to 98.2 / 1.8, and represented by the following general formula (1): And a polyester resin molded body comprising an isosorbide derivative.

In the general formula (1), R ¹ and R ² each independently represents a divalent group A alkylene group, an arylene group, or an alkylene group and an arylene group linked.

The invention according to claim 7 provides:
The polyester resin molded product according to claim 6, wherein the polyester has a weight average molecular weight of 20,000 or more and 80,000 or less .

The invention according to claim 8 provides:
The polyester resin molding of Claim 6 or Claim 7 whose mass ratio which occupies for the whole resin molding of the said polyester is 75 to 99 mass%.

The invention according to claim 9 is:
The polyester resin molding of any one of Claims 6-8 whose mass ratio which occupies for the whole resin molding of the said isosorbide derivative is 1 to 30 mass%.

The invention according to claim 10 is:
Furthermore, the polyester resin molding of any one of Claims 6-9 containing the at least 1 sort (s) of flame retardant chosen from phosphate ester and a sulfonic acid group containing compound.

According to the invention which concerns on Claim 1, 2, compared with the case where the said isosorbide derivative is not included, the polyester resin composition which is excellent in the impact resistance of a molded object and transparency is provided.
According to the invention which concerns on Claim 3, compared with the case where the mass ratio of polyester remove | deviates from the said range, the polyester resin composition which is excellent by the impact resistance of a molded object and transparency is provided.
According to the invention which concerns on Claim 4, compared with the case where the mass ratio of the said isosorbide derivative remove | deviates from the said range, the polyester resin composition which is excellent by the impact resistance and transparency of a molded object is provided.
According to the invention which concerns on Claim 5, compared with the case where a phosphate ester or a sulfonic acid group containing compound is not included as a flame retardant and another compound is included, the polyester resin composition which is excellent in a flame retardance is provided.

According to the invention which concerns on Claim 6, 7, compared with the case where the said isosorbide derivative is not included, the polyester resin molding which is excellent in impact resistance and transparency is provided.
According to the invention which concerns on Claim 8, compared with the case where the mass ratio of polyester remove | deviates from the said range, the polyester resin molded object which is more excellent in impact resistance and transparency is provided.
According to the invention which concerns on Claim 9, compared with the case where the mass ratio of the said isosorbide derivative remove | deviates from the said range, the polyester resin molded object which is more excellent in impact resistance and transparency is provided.
According to the invention which concerns on Claim 10, a polyester resin molded object is provided compared with the case where a phosphate ester or a sulfonic acid group containing compound is not included as a flame retardant, but another compound is included.

  Embodiments of the present invention will be described below. These descriptions and examples are illustrative of the invention and are not intended to limit the scope of the invention.

  In the present specification, when referring to the amount of each component in the composition, when there are a plurality of substances corresponding to each component in the composition, the plurality of kinds present in the composition unless otherwise specified. Means the total amount of substances.

<Polyester resin composition>
The polyester resin composition according to the present embodiment contains polyester and an isosorbide derivative represented by the following general formula (1).

In the general formula (1), R ¹ and R ² each independently represents a divalent group A alkylene group, an arylene group, or an alkylene group and an arylene group linked.

  The polyester resin composition which concerns on this embodiment is excellent in the impact resistance and transparency of a molded object by the said structure. The presumed mechanism is explained below.

The molded body of the polyester resin composition generally has low impact resistance, although it depends on the chemical structure of the polyester (that is, the type of monomer). The reason why the impact resistance of the molded body is low is that molecular orientation of the polyester is likely to occur even if the crystallization speed is different.
On the other hand, this inventor discovered that the impact resistance of a molded object improved notably by mix | blending the isosorbide derivative represented by General formula (1) with a polyester resin composition. Since the isosorbide derivative has a hydroxyl group at the end of the substituent bonded to the alicyclic structure, it is highly compatible with the polyester. In addition, the bulk of the alicyclic structure is not too large and not too small. It is considered to be moderately disturbed. As a result, it is considered that the impact resistance of the molded body is improved.

  The molded article of the polyester resin composition is inferior in transparency as the polyester has more molecularly oriented parts or larger parts. When the isosorbide derivative represented by the general formula (1) is blended with the polyester, the isosorbide derivative disturbs the molecular orientation of the polyester as described above. Therefore, it is considered that the transparency of the molded body is increased. Furthermore, it is considered that the transparency is remarkably increased due to the high compatibility between the isosorbide derivative and the polyester and the birefringence of the isosorbide derivative being almost zero.

  Hereinafter, the component of the polyester resin composition which concerns on this embodiment is demonstrated in detail.

[polyester]
The polyester is not particularly limited, and a conventionally known polyester may be used. The polyester may be a polycondensate of a dicarboxylic acid and a diol (for example, polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate, polypropylene terephthalate, polybutylene succinate, a copolymer thereof), or a polycondensate of hydroxycarboxylic acid ( For example, polylactic acid, polyhydroxy-3-butyrate, polyhydroxy-5-hexanoate, or a copolymer thereof may be used. These polymers may be used alone or in combination of two or more.

  As the polyester, a copolymer of polyethylene terephthalate (PET) and polyethylene isophthalate (PEI) exhibits better impact resistance and transparency in combination with the isosorbide derivative represented by the general formula (1). This is desirable. The PET / PEI copolymer preferably has a copolymerization ratio (molar ratio, PET / PEI) of 99.5 / 0.5 to 98.2 / 1.8 from the viewpoint of reducing the thickness of the molded product.

  The weight average molecular weight of the polyester is, for example, 20000 or more and 80000 or less, and desirably 20000 or more and 65000 or less.

  50 mass% or more and 99 mass% or less are good for the mass ratio to the whole resin composition of polyester, and 75 mass% or more and 99 mass% or less are desirable. When the mass ratio of the polyester is 75% by mass or more, it is more excellent in impact resistance. On the other hand, from the viewpoint of securing the content of the isosorbide derivative represented by the general formula (1) and improving the impact resistance of the resin composition, the mass ratio of the polyester is desirably 99% by mass or less. From the above viewpoint, the mass ratio of the polyester is more preferably 80% by mass to 95% by mass, and still more preferably 85% by mass to 90% by mass.

[Isosorbide derivatives]
The polyester resin composition according to the present embodiment contains an isosorbide derivative represented by the general formula (1) (also simply referred to as “isosorbide derivative”).

In the general formula (1), the alkylene group represented by R ¹ and R ² is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 4 carbon atoms, and 2 carbon atoms. Or an alkylene group of 3 is more desirable. The alkylene group may be linear, branched, or cyclic. Specifically, for example, a linear alkylene group such as a methylene group, ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group; propylene group, iso-butylene group, tert-butylene group, iso A branched alkylene group such as a pentylene group, a tert-pentylene group, an iso-hexylene group or a tert-hexylene group; a cyclic alkylene group such as a cyclopropylene group, a cyclobutylene group, a cyclopentylene group or a cyclohexylene group; Is mentioned.

In the general formula (1), the arylene group represented by R ¹ and R ² is preferably an arylene group having 6 to 12 carbon atoms. Specific examples include a phenylene group, a naphthylene group, a biphenylene group, and the like, and a phenylene group is desirable. The arylene group may be substituted with an alkyl group, for example, an alkyl group having 1 to 4 carbon atoms (for example, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a cyclopropyl group, an n-butyl group). , Isobutyl group, tert-butyl group, cyclobutyl group, etc.).

In the general formula (1), the divalent group represented by R ¹ and R ² in which an alkylene group and an arylene group are linked is a group in which at least one alkylene group and at least one arylene group are linked. Either the alkylene group or the arylene group may be on the alicyclic structure side, and the alkylene group and the arylene group may be alternately connected.
The alkylene group is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 4 carbon atoms, and further preferably an alkylene group having 1 or 2 carbon atoms. As the arylene group, an arylene group having 6 to 12 carbon atoms is desirable, and a phenylene group is more desirable. The arylene group may be substituted with an alkyl group, for example, may be substituted with an alkyl group having 1 to 4 carbon atoms.

  Specifically, the divalent group is an alkylene group having 1 to 4 carbon atoms (for example, methylene group, ethylene group, trimethylene group, tetramethylene group, propylene group, iso-butylene group, tert-butylene group, (A cyclopropylene group, a cyclobutylene group, etc.) and a group in which a phenylene group is linked are desirable, and a group in which an alkylene group having 1 or 2 carbon atoms and a phenylene group are linked is more desirable. In this case, either the alkylene group or the phenylene group may be on the alicyclic structure side, and the alkylene group and the phenylene group may be alternately connected.

  Although the specific example of an isosorbide derivative is given to the following, this invention is not restrict | limited to this.

  As for the mass ratio to the whole resin composition of an isosorbide derivative, 1 to 30 mass% is desirable. When the mass proportion of the isosorbide derivative is 1% by mass or more, the impact resistance of the resin composition is higher. On the other hand, when the mass ratio of the isosorbide derivative is 30% by mass or less, the impact resistance is higher and the transparency is more excellent. From the above viewpoint, the mass ratio of the isosorbide derivative is more preferably 1% by mass or more and 25% by mass or less, further preferably 1% by mass or more and 20% by mass or less, and further preferably 5% by mass or more and 20% by mass or less. It is as follows.

[Flame retardants]
The polyester resin composition according to this embodiment may further contain a flame retardant. The flame retardant is not particularly limited, and a conventionally known one may be used. For example, a phosphorus flame retardant, a sulfuric acid flame retardant, a nitrogen flame retardant, an inorganic hydroxide flame retardant, a halogen flame retardant, a silicone flame retardant Examples include flame retardants.

  In the present embodiment, the flame retardant is preferably a phosphoric acid ester (including a condensed phosphoric acid ester) and a sulfonic acid group-containing compound. When the polyester resin composition according to the present embodiment contains at least one of a phosphate ester and a sulfonic acid group-containing compound, the flame retardancy of a molded article having a thin film thickness is significantly improved. This effect is not exhibited even when a flame retardant other than the above, for example, ammonium polyphosphate, melamine cyanurate, aluminum hydroxide, or the like is added. Since phosphate ester is excellent in affinity with the isosorbide derivative represented by the general formula (1), it is assumed that the dispersion state in the resin composition is extremely good. On the other hand, the sulfonic acid group-containing compound serves as a catalyst for binding the polyester and the isosorbide derivative represented by the general formula (1) during combustion, and promoting the char-forming effect of the polyester leads to an improvement in flame retardancy. Presumed to be.

  Examples of phosphate esters include trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, tris (isopropylphenyl) phosphate. , Tris (phenylphenyl) phosphate, trinaphthyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, diphenyl (2-ethylhexyl) phosphate, di (isopropylphenyl) phenyl phosphate, monoisodecyl phosphate, 2-acryloyloxyethyl acid Phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl Examples include 2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, melamine phosphate, dimelamine phosphate, melamine pyrophosphate, triphenylphosphine oxide, tricresylphosphine oxide, diphenyl methanephosphonate, and diethyl phenylphosphonate. It is done.

  Examples of the condensed phosphate ester include aromatic condensed phosphate esters such as bisphenol A type, biphenylene type, and isophthal type. Specifically, for example, a condensed phosphate ester represented by the following general formula (A) and a condensed phosphate ester represented by the following general formula (B) can be mentioned.

In general formula (A), Q ¹ , Q ² , Q ³ and Q ⁴ each independently represent an alkyl group having 1 to 6 carbon atoms, Q ⁵ and Q ⁶ each independently represent a methyl group, Q ⁷ and Q ⁸ each independently represent a hydrogen atom or a methyl group, m1, m2, m3 and m4 each independently represent an integer of 0 or more and 3 or less, and m5 and m6 each independently represent 0 or more and 2 The following integer is represented, n1 represents the integer of 0-10.

In the general formula (B), Q ⁹ , Q ¹⁰ , Q ¹¹ and Q ¹² each independently represents an alkyl group having 1 to 6 carbon atoms, Q ¹³ represents a methyl group, m7, m8, m9 and m10. Each independently represents an integer of 0 or more and 3 or less, m11 represents an integer of 0 or more and 4 or less, and n2 represents an integer of 0 or more and 10 or less.

  The condensed phosphate ester may be a synthetic product or a commercial product. As commercially available products of condensed phosphate esters, for example, “PX200”, “PX201”, “PX202”, “CR741”, etc., which are commercially available products from Daihachi Chemical Industry Co., Ltd., “Adekastab FP2100” And “ADK STAB FP2200”.

  Examples of the sulfonic acid group-containing compound include a polymer into which a sulfonic acid group or a sulfonic acid group is introduced, a salt of sulfuric acid and a basic compound, polymer particles having sulfuric acid or a sulfate on the surface, and the like. Examples thereof include potassium polystyrene sulfonate, sodium polystyrene sulfonate, AS (acrylonitrile styrene) resin potassium sulfonate, AS resin sodium sulfonate, melamine sulfate, guanidine sulfate, sulfuric acid, or potassium sulfate-coated polystyrene particles.

  The mass ratio of the flame retardant to the entire resin composition is preferably 1% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 25% by mass or less, from the viewpoint of improving flame retardancy and suppressing bleeding. % To 20% by mass is more desirable.

[Other ingredients]
The polyester resin composition according to the present embodiment may further include other components than those described above as necessary. Other components include, for example, compatibilizers, plasticizers, antioxidants, mold release agents, light proofing agents, weathering agents, colorants, pigments, modifiers, anti-drip agents, antistatic agents, and hydrolysis resistance. Agents, fillers, reinforcing agents (glass fiber, carbon fiber, talc, clay, mica, glass flake, milled glass, glass beads, crystalline silica, alumina, silicon nitride, alumina nitride, boron nitride, etc.) . The content of these components is preferably 0% by mass or more and 5% by mass or less with respect to the entire resin composition. Here, “0 mass%” means that other components are not included.

The polyester resin composition according to the present embodiment may contain a resin other than polyester. However, other resins are blended in such a range that the moldability by the molding machine is not reduced.
Examples of the other resins include conventionally known thermoplastic resins, and specifically, polycarbonate resins; polypropylene resins; polyolefin resins; polyester carbonate resins; polyphenylene ether resins; polyphenylene sulfide resins; Polysulfene resin; Polyarylene resin; Polyetherimide resin; Polyacetal resin; Polyvinyl acetal resin; Polyketone resin; Polyetherketone resin; Polyetheretherketone resin; Polyarylketone resin; Polyethernitrile resin; Polyparabanic acid resin; one or more vinyl resins selected from the group consisting of aromatic alkenyl compounds, methacrylic acid esters, acrylic acid esters, and vinyl cyanide compounds; Vinyl polymer or copolymer resin obtained by polymerizing or copolymerizing monomers; diene-aromatic alkenyl compound copolymer resin; vinyl cyanide-diene-aromatic alkenyl compound copolymer resin; Alkenyl compound-diene-vinyl cyanide-N-phenylmaleimide copolymer resin; vinyl cyanide- (ethylene-diene-propylene (EPDM))-aromatic alkenyl compound copolymer resin; polyolefin; vinyl chloride resin; chlorine Vinyl chloride resin; and the like. These resins may be used alone or in combination of two or more.

[Production method of polyester resin composition]
The polyester resin composition according to this embodiment is produced, for example, by melt-kneading a mixture of the above components. In addition, the polyester resin composition according to the present embodiment is produced, for example, by dissolving the above components in a solvent. Examples of the melt-kneading means include known means, and specific examples include a twin screw extruder, a Henschel mixer, a Banbury mixer, a single screw extruder, a multi-screw extruder, and a kneader.

<Polyester resin molding>
The polyester resin molded body according to this embodiment is composed of the polyester resin composition according to this embodiment. That is, the polyester resin molded body according to the present embodiment is configured with the same composition as the polyester resin composition according to the present embodiment.
Specifically, the resin molded body according to the present embodiment is obtained by molding the polyester resin composition according to the present embodiment. As the molding method, for example, injection molding, extrusion molding, blow molding, hot press molding, calendar molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding, or the like may be applied.

  The molding method of the resin molded body according to the present embodiment is preferably injection molding because it has a high degree of freedom in shape. The injection molding may be performed using a commercially available apparatus such as NEX150 manufactured by NISSEI RESIN INDUSTRY, NEX70000 manufactured by NISSEI RESIN INDUSTRY, SE50D manufactured by Toshiba Machine.

  The resin molded body according to this embodiment is suitable for articles that require both impact resistance and transparency, such as electronic / electrical equipment, office equipment, home appliances, automobile interior materials, and containers. More specifically, casings for electronic / electrical equipment and home appliances; various parts of electronic / electrical equipment and home appliances; interior parts for automobiles; storage cases such as CD-ROM and DVD; tableware; beverage bottles; Wrap material; film; sheet;

  EXAMPLES The present invention will be described in further detail with reference to examples below, but the present invention is not limited to these examples.

<Production of resin composition and resin molded body>
[Kneading]
The materials shown in Table 1 were charged into a biaxial kneader (TEX41SS manufactured by TOSHIBA MACHINE) and kneaded at the cylinder temperature shown in Table 2 to obtain Compositions 1 to 22 and C5 to C9. Compositions C1 to C4 had a resin-only composition and were not kneaded. Compositions C10 and C11 were produced according to the description in WO2008 / 146719 as described later. The numerical values in Table 1 are parts by mass.

The material types in Table 1 are as follows.
-Polyester-
Compound 1: Polyethylene terephthalate / isophthalate copolymer, copolymerization ratio (molar ratio) 98.8 / 1.2, weight average molecular weight 24000 (BCB80 manufactured by Brasschem)
Compound 2: Polyethylene terephthalate / isophthalate copolymer, copolymerization ratio (molar ratio) 98.3 / 1.7, weight average molecular weight 28000 (TRN-8580FC manufactured by Teijin Chemicals Ltd.)
Compound 3: Polypropylene terephthalate, weight average molecular weight 41000 (DuPont Sorona EP3301N0010)
Compound 4: polylactic acid, weight average molecular weight 61000 (Termac TE-2000 manufactured by Unitika)

-Isosorbide derivatives-
Compound 5: Compound I-1 described above
Compound 6: Compound I-2 described above
Compound 7: Compound I-3 described above
Compound 8: Compound I-4 described above
Compound 9: Compound I-5 described above

-Flame retardant-
Compound 10: condensed phosphate ester (PX200 manufactured by Daihachi Chemical Industry Co., Ltd.)
Compound 11: condensed phosphate ester (CR741 manufactured by Daihachi Chemical Industry Co., Ltd.)
Compound 12: Compound containing sulfonic acid group (PASS-K manufactured by Sony Chemical Corporation)
Compound 13: Aluminum hydroxide (Hijilite S-48TV manufactured by Showa Denko)
Compound 14: Melamine cyanurate (MC-4000 manufactured by Nissan Chemical Industries)

-Plasticizer-
Compound 15: Phthalate ester (Wako Pure Chemical Industries, Ltd.)
Compound 16: Adipic acid ester (Wako Pure Chemical Industries, Ltd.)
Compound 17: Triphenyl phosphate (manufactured by Daihachi Chemical Industry Co., Ltd.)

-Polycarbonate-
A polycarbonate resin (pellet) containing a repeating unit derived from isosorbide was produced according to the description in WO2008 / 146719.
Compound 18: Polycarbonate resin of Reference Example 1 in International Publication No. 2008/146719 Compound 19: Polycarbonate Resin of Reference Example 3 in International Publication No. 2008/146719

[Molding]
Compositions 1 to 22 and C1 to C11 were respectively charged into an injection molding machine (Nex 150 manufactured by Nissei Plastic Industries), and at a cylinder temperature and a mold temperature shown in Table 2, an ISO multipurpose dumbbell test piece (test portion length 100 mm, width 10 mm, 4 mm thick), D2 test pieces (length 60 mm, width 60 mm, thickness 2 mm), and UL test pieces (length 125 mm, width 13 mm, thickness 0.5 mm / 1.6 mm) were prepared. The mold temperature was set low by circulating cold water in the mold.

<Evaluation>
[Shock resistance]
The ISO multi-purpose dumbbell test piece was processed according to ISO 179, and the notched Charpy impact strength (kJ / m ² ) was measured according to ISO 179 using a digital impact resistance test device (DZ-GI manufactured by Toyo Seiki Seisakusho). The results are shown in Table 3.

[Total light transmittance]
The total light transmittance (%) of the D2 test piece was measured using a haze / transmittance meter (MH-150, manufactured by Murakami Color Research Laboratory). The results are shown in Table 3.

[Flame retardance]
Flame retardancy was evaluated according to the UL94 standard V test using a UL test piece. Judgment criteria are V-0, V-1, V-2, and Not in the order of excellent flame retardancy. The results are shown in Table 3.

Claims (10)

A polyester containing a polyethylene (terephthalate / isophthalate) copolymer having a copolymerization ratio (molar ratio) in the range of 99.5 / 0.5 to 98.2 / 1.8, and represented by the following general formula (1): A polyester resin composition comprising an isosorbide derivative.

In the general formula (1), R ¹ and R ² each independently represents a divalent group A alkylene group, an arylene group, or an alkylene group and an arylene group linked.   The polyester resin composition of Claim 1 whose weight average molecular weights of the said polyester are 20000 or more and 80000 or less.   The polyester resin composition of Claim 1 or Claim 2 whose mass ratio which occupies for the whole resin composition of the said polyester is 75 mass% or more and 99 mass% or less.   The polyester resin composition according to any one of claims 1 to 3, wherein a mass ratio of the isosorbide derivative to the entire resin composition is 1% by mass or more and 30% by mass or less.   The polyester resin composition according to any one of claims 1 to 4, further comprising at least one flame retardant selected from a phosphate ester and a sulfonic acid group-containing compound. A polyester containing a polyethylene (terephthalate / isophthalate) copolymer having a copolymerization ratio (molar ratio) in the range of 99.5 / 0.5 to 98.2 / 1.8, and represented by the following general formula (1): And a polyester resin molded body comprising an isosorbide derivative.

In the general formula (1), R ¹ and R ² each independently represents a divalent group A alkylene group, an arylene group, or an alkylene group and an arylene group linked.   The polyester resin molded product according to claim 6, wherein the polyester has a weight average molecular weight of 20,000 or more and 80,000 or less.   The polyester resin molding of Claim 6 or Claim 7 whose mass ratio which occupies for the whole resin molding of the said polyester is 75 to 99 mass%.   The polyester resin molding of any one of Claims 6-8 whose mass ratio which occupies for the whole resin molding of the said isosorbide derivative is 1 to 30 mass%.   Furthermore, the polyester resin molding of any one of Claims 6-9 containing the at least 1 sort (s) of flame retardant chosen from phosphate ester and a sulfonic acid group containing compound.