High impact polyester material

Abstract

To provide an impact-resistant polyester material which includes a polyester resin matrix material, a toughening agent and a compatibilizing agent, where the toughening agent and the compatibilizing agent are dispersed in the polyester resin matrix material.SOLUTION: The toughening agent is a polyolefin elastomer (POE). The compatibilizing agent is configured to assist in improving compatibility between the toughening agent and the polyester resin matrix material. The compatibilizing agent is at least one of a polyolefin elastomer compatibilizing agent grafted with glycidyl methacrylate (POE-g-GMA) and a polyolefin elastomer compatibilizing agent grafted with maleic anhydride (POE-g-MAH). The compatibilizing agent is configured to assist the toughening agent to be dispersed into the polyester resin matrix material with a particle size between 0.5 μm and 1.5 μm, so that the impact-resistant polyester material has an impact strength of not less than 20 kg-cm / cm.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to polyester materials, and in particular to impact resistant polyester materials. [Background technology]

[0002] To improve the impact strength of polyester materials, current technology often employs direct polymerization or additive modification methods.

[0003] The direct polymerization method is to introduce a long carbon chain such as polyol into the composition and directly polymerize it into a polyester elastomer. However, the production cost of the direct polymerization method is high, and the rigidity of the produced material is relatively low, so that the material does not meet the requirements for toughness and rigidity.

[0004] The additive modification method is to add a modifier, such as an acrylic elastomer or a polyester elastomer, to the polyester material as an impact modifier, but the toughness of these elastomers themselves is low, so the effect of improving the impact strength of the polyester material is limited. Although the impact strength can be improved by adding a large amount of these elastomers, the production cost becomes high.

[0005] Therefore, in view of the fact that the above-mentioned problems can be improved, the inventors conducted intensive research and applied scientific theory, and as a result, arrived at the present invention as a method that is rational in design and can effectively improve the above-mentioned problems. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem that the present invention is to solve is to provide an impact resistant polyester material in response to the shortcomings of the prior art. [Means for solving the problem]

[0007] In order to solve the above technical problems, one technical means adopted by the present invention provides an impact-resistant polyester material, which includes a polyester resin substrate, a toughening agent dispersed in the polyester resin substrate and being a polyolefin elastomer (POE), and a compatibilizer dispersed in the polyester resin substrate for improving the compatibility between the toughening agent and the polyester resin substrate, the compatibilizer being at least one of a polyolefin elastomer compatibilizer grafted with glyceryl methacrylate (POE-g-GMA) and a polyolefin elastomer compatibilizer grafted with maleic anhydride (POE-g-MAH), and by blending the compatibilizer, the toughening agent is dispersed in the polyester resin substrate with a particle diameter of 0.5 to 1.5 μm, thereby imparting the impact-resistant polyester material with an impact strength of 20 kg-cm / cm or more.

[0008] Preferably, the content of the polyester resin base material is 70 to 95 wt%, the content of the toughening agent is 5 to 15 wt%, and the content of the compatibilizer is 2 to 15 wt%, with the total weight of the impact-resistant polyester material being 100 wt%.

[0009] Preferably, the content of the polyester resin base material is 70 to 90 wt%, the content of the toughening agent is 7 to 10 wt%, and the content of the compatibilizer is 2 to 5 wt%, with the total weight of the impact-resistant polyester material being 100 wt%.

[0010] Preferably, the content of the toughening agent is equal to or greater than the content of the compatibilizer, and the weight ratio of the toughening agent to the compatibilizer (the toughening agent:the compatibilizer) is 1:1 to 4:1.

[0011] Preferably, the impact resistant polyester material comprises an antioxidant and a slip agent dispersed in the polyester resin base material, and in particular, the content of the antioxidant is 0.1-1.0 wt% and the content of the slip agent is 0.1-1.0 wt%, based on a total weight of the impact resistant polyester material being 100 wt%.

[0012] Preferably, the molecular structure of all of the toughening agents is polyolefin elastomer (POE), and the molecular structure of the compatibilizer has a main chain and a side chain, and the main chain is polyolefin elastomer (POE).

[0013] Preferably, the compatibilizer is a polyolefin elastomer compatibilizer grafted with glyceryl methacrylate (POE-g-GMA), the molecular structure of the compatibilizer having a main chain and a side chain melt-grafted to the main chain, the main chain being polyolefin elastomer (POE) and the side chain being glyceryl methacrylate (GMA), in which the glyceryl methacrylate undergoes a ring-opening reaction during kneading, and the epoxy group in the glyceryl methacrylate undergoes a chemical reaction with the ester group in the molecular structure of the polyester resin substrate after the ring-opening reaction, thereby dispersing the toughening agent in the polyester resin substrate.

[0014] Preferably, the polyester resin substrate has a first melt flow index and the toughening agent has a second melt flow index, and in particular, the first melt flow index of the polyester resin substrate is 55 g / 10 min to 65 g / 10 min and the second melt flow index of the toughening agent is 75 to 125% of the first melt flow index of the polyester resin substrate.

[0015] Preferably, the polyester resin base material is a continuous phase, and the toughening agent is a dispersed phase dispersed in the continuous phase, and in particular, the dispersed phase and the continuous phase act together to form an island structure on the surface of the impact resistant polyester material.

[0016] Preferably, the impact resistant polyester material satisfies at least one of the following conditions: (i) it has an impact strength of 20 to 50 kg-cm / cm; (ii) it has a compressibility of 1.15 to 1.30 g / cm 3 (iii) a tensile strength of 38 to 50 MPa, (iv) a flexural strength of 65 to 75 MPa, (v) a flexural modulus of 1,800 to 2,200 MPa, (vi) a heat distortion temperature of 55 to 80°C, (vii) a shrinkage ratio of 0.7 to 1.0, and (viii) an HB level based on the UL94 flammability standard. Effect of the Invention

[0017] As an advantageous effect of the present invention, the impact-resistant polyester material according to the present invention has the following technical features: "the toughening agent is dispersed in the polyester resin substrate and is a polyolefin elastomer (POE)", "the compatibilizer for improving the compatibility between the toughening agent and the polyester resin substrate is dispersed in the polyester resin substrate", "the compatibilizer is at least one of a polyolefin elastomer compatibilizer grafted with glyceryl methacrylate (POE-g-GMA) and a polyolefin elastomer compatibilizer grafted with maleic anhydride (POE-g-MAH)", and "the toughening agent is dispersed in the polyester resin substrate with a particle size of 0.5 to 1.5 μm by blending the compatibilizer", which greatly improves the impact strength of the polyester material and enhances the application value of the polyester material. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram showing an impact-resistant polyester material according to a first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to better understand the features and technical contents of the present invention, please refer to the following detailed description of the present invention and the accompanying drawings, which are provided for reference and explanation only and are not intended to limit the scope of the present invention.

[0020] Certain specific embodiments will be described below, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the contents disclosed in this specification. The present invention can be implemented or applied by other different specific embodiments, and various modifications and changes can be made to each detail in this specification based on different perspectives and applications without departing from the concept of the present invention. In addition, as described in advance, the accompanying drawings of the present invention are simple schematic illustrations and are not drawn based on actual size. The technical contents of the present invention will be described in more detail based on the following embodiments, but the disclosed contents do not limit the protection scope of the present invention.

[0021] It should be understood that, although the present specification may use the terms "first", "second", "third" and the like to describe various elements or signals, these elements or signals are not limited by these terms. These terms are mainly used to distinguish one element from another element or one signal from another signal. In addition, the term "or" used in the present specification may include any one or more combinations of the associated listed items according to actual circumstances.

[0022] [Impact-resistant polyester material] As shown in Figure 1, in an embodiment of the present invention, an impact resistant polyester material 100 is provided. The impact resistant polyester material 100 includes a polyester resin substrate 1, a toughening agent 2 (also called an impact modifier), and a compatibilizer (not shown).

[0023] One object of the present invention is to improve the compatibility of the toughening agent 2 with the polyester resin substrate 1 and to improve the dispersibility of the toughening agent 2 in the polyester resin substrate 1. Thus, the impact-resistant polyester material 100 in the embodiment of the present invention has a relatively high impact strength. For example, the impact strength of a normal polyester material is 5 kg-cm / cm or less. In contrast, the impact strength of the impact-resistant polyester material 100 in the embodiment of the present invention is improved to 20 kg-cm / cm or more, and preferably 30 to 48 kg-cm / cm.

[0024] The impact-resistant polyester material 100 according to the embodiment of the present invention can be applied to injection or extrusion products requiring high impact resistance, such as suitcases, safety helmets, electronic casings, food trays, electronic and automotive decorative films, instead of plastic materials such as acrylonitrile-butadiene-styrene (ABS), polycarbonate (PC) and polypropylene (PP).

[0025] In this embodiment, the polyester resin substrate 1 is a matrix of an impact-resistant polyester material 100. The polyester resin substrate 1 is a polymer obtained by a condensation polymerization reaction between a dibasic acid and a dihydric alcohol or a derivative thereof. That is, the polyester resin substrate 1 is a polyester, and is preferably polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), and particularly preferably polyethylene terephthalate (PET), but the present invention is not limited thereto.

[0026] With respect to the content, the content of the polyester resin substrate 1 is preferably 70 to 95 wt%, and particularly preferably 70 to 90 wt%, with the total weight of the impact-resistant polyester material 100 being 100 wt%. It is worth noting that the "substrate" or "matrix" in this specification is a material whose composition accounts for more than half of the total weight.

[0027] The dibasic acid for forming the polyester material is at least one of terephthalic acid, isophthalic acid, 1,5-naphthalic acid, 2,6-naphthalic acid, 1,4-naphthalic acid, dibenzoic acid, diphenylethanedicarboxylic acid, diphenylsulfonedicarboxylic acid, 2,6-anthracenedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, dimethylmalonic acid, succinic acid, 3,3-diethylsuccinic acid, glutaric acid, 2,2-dimethylglutaric acid, adipic acid, 2-methyladipic acid, trimethyladipic acid, pimelic acid, azelaic acid, sebacic acid, suberic acid, and dodecanedioic acid. Preferably, the dibasic acid is terephthalic acid.

[0028] The dihydric alcohol for forming the polyester material is at least one of ethylene glycol, propanediol, hexamethylene glycol, neopentyl glycol, 1,2-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 1,10-decanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2-bis(4-hydroxyphenyl)propane, and bis(4-hydroxyphenyl)sulfone. Preferably, the dihydric alcohol is ethylene glycol.

[0029] Furthermore, as shown in FIG. 1, in order to impart high impact strength to the impact-resistant polyester material 100, the toughening agent 2 (also called impact modifier) ​​is added to the impact-resistant polyester material 100, and the toughening agent 2 is dispersed in the polyester resin substrate 1. As the toughening agent, the toughening agent is a polyolefin elastomer (POE), which is also called a polyolefin thermoplastic elastomer. The toughening agent 2 is dispersed in the polyester resin substrate 1, thereby improving the impact strength of the impact-resistant polyester material 100.

[0030] Regarding the content, the content of the toughening agent 2 is 5 to 15 wt%, and particularly preferably 7 to 10 wt%, relative to the total weight of the impact resistant polyester material 100 being 100 wt%.

[0031] According to the above-mentioned configuration, the impact-resistant polyester material 100 can be given high impact strength by adding the toughening agent 2. If the content of the toughening agent 2 is lower than the lower limit of the content, the impact-resistant polyester material 100 does not meet the desired impact strength, and cannot be applied to products requiring high impact strength. On the other hand, if the content of the toughening agent 2 is higher than the upper limit of the content, the toughening agent 2 cannot be uniformly dispersed in the polyester resin substrate 1, resulting in aggregation or precipitation, which may affect the molding effect and impact strength expression of the final product.

[0032] From another point of view, one object of the present invention is to achieve a polyester material having impact strength, high rigidity, and low material cost at the same time by improving the impact strength of the polyester material. In order to achieve such an object, a polyolefin elastomer (POE) is used as a toughening agent (also called an impact modifier) ​​in the impact resistant polyester material 100 according to the embodiment of the present invention.

[0033] Compared with acrylic elastomer or polyester elastomer, polyolefin elastomer has better toughness and relatively low material cost, so that it is quite advantageous to use polyolefin elastomer in improving the impact strength of polyester material.However, the compatibility between polyolefin elastomer and polyester material is poor, and when polyolefin elastomer and polyester material are directly mixed by additive modification method, polyolefin elastomer is easily agglomerated, so that the impact strength of polyester material cannot be effectively improved.

[0034] Thus, the main point of the present invention is to improve the compatibility between the polyolefin elastomer and the polyester, and to adjust the dispersed particle size of the polyolefin elastomer dispersed in the polyester material to 0.5 to 1.5 μm, preferably 0.5 to 1.2 μm, by viscosity matching and kneading / dispersion. Due to such dispersed particle size, the impact resistant polyester material 100 according to the embodiment of the present invention can achieve high impact resistance.

[0035] More specifically, the compatibilizer (not shown) is dispersed in the polyester resin substrate 1. By adding the compatibilizer, the compatibility between the toughening agent 2 and the polyester resin substrate 1 is improved.

[0036] As for the compatibilizer, the compatibilizer is a polyolefin elastomer compatibilizer. Specifically, the compatibilizer is at least one of a polyolefin elastomer grafted with glycidyl methacrylate (POE-g-GMA) and a polyolefin elastomer grafted with maleic anhydride (POE-g-MAH). Preferably, the compatibilizer is a polyolefin elastomer grafted with glycidyl methacrylate (POE-g-GMA).

[0037] More specifically, by blending the compatibilizer and dispersing the toughening agent 2 in the polyester resin substrate 1 with a particle size of 0.5 to 1.5 μm, an impact strength of 20 kg-cm / cm or more is imparted to the impact-resistant polyester material 100. That is, the compatibility and dispersibility of the toughening agent 2 in the polyester resin substrate 1 are effectively improved by the compatibilizer, so that the toughening agent 2 can be dispersed in the polyester resin substrate 1 with a small particle size and is less likely to aggregate.

[0038] In one preferred embodiment of the present invention, the toughening agent 2 is dispersed in the polyester resin substrate 1 with a particle size of 0.5 to 1.2 μm, and the impact strength of the impact resistant polyester material 100 is 28 to 50 kg-cm / cm or more, and particularly preferably 30 to 45 kg-cm / cm.

[0039] With regard to the content, the content of the compatibilizer is preferably 5 to 15 wt % with the total weight of the impact resistant polyester material 100 being 100 wt %.

[0040] With the above-mentioned configuration, the compatibilizer allows the toughening agent 2 to be dispersed in the polyester resin substrate 1 with a small particle size. If the content of the compatibilizer is lower than the lower limit of the content, the compatibilizer cannot effectively perform the role of dispersing the toughening agent 2 in the polyester resin substrate 1 with a small particle size. On the other hand, if the content of the compatibilizer is higher than the upper limit of the content, the compatibilizer may affect the molding effect of the polyester material and may cause aggregation or precipitation.

[0041] More specifically, the content of the toughening agent 2 and the content of the compatibilizer have a corresponding relationship. Specifically, the content of the toughening agent 2 is equal to or greater than the content of the compatibilizer. The weight ratio of the toughening agent 2 to the compatibilizer (toughening agent: compatibilizer) is preferably 1:1 to 4:1, and particularly preferably 1:1 to 2:1.

[0042] As additives, the impact-resistant polyester material 100 further contains an antioxidant and a slip agent dispersed in the polyester resin substrate 1, and in particular, the content of the antioxidant is 0.1-1.0 wt%, and the content of the slip agent is 0.1-1.0 wt%, based on the total weight of the impact-resistant polyester material being 100 wt%.

[0043] As the material of the antioxidant, the antioxidant is at least one selected from the group consisting of phenol-based antioxidants, phosphorous-based antioxidants, and hindered phenol-based antioxidants, and as the material of the slip agent, the slip agent is at least one selected from the group consisting of silicon dioxide, stearic acid, polyethylene wax, stearates, fatty acid esters, and composite slip agents, but the present invention is not limited thereto. In terms of their uses, the antioxidant is for improving the antioxidant ability of the polyester material 100, and the slip agent is for reducing the friction coefficient or adhesion of the surface of the polyester material 100.

[0044] In one embodiment of the present invention, the molecular structure of the toughening agent 2 is all polyolefin elastomer (POE). The molecular structure of the compatibilizer has a main chain and a side chain, and the main chain is polyolefin elastomer (POE). Therefore, the main chain of the compatibilizer provides good compatibility between the compatibilizer and the toughening agent 2 (because the molecular structures of the two are the same).

[0045] In one embodiment of the present invention, the compatibilizer is a polyolefin elastomer compatibilizer grafted with glyceryl methacrylate (POE-g-GMA), whose molecular structure has a main chain and side chains melt-grafted to the main chain, the main chain being polyolefin elastomer (POE) and the side chains being glyceryl methacrylate (GMA).

[0046] The glyceryl methacrylate undergoes a ring-opening reaction during kneading, and the epoxy group in the glyceryl methacrylate undergoes a chemical reaction with the ester group in the molecular structure of the polyester resin substrate after the ring-opening reaction, so that the toughening agent 2 can be more uniformly dispersed in the polyester resin substrate 1.

[0047] In one embodiment of the present invention, in order to improve the dispersibility of the toughening agent 2 (POE) in the polyester resin substrate 1, the impact-resistant polyester material 100 can be prepared, for example, by first forming a polyester masterbatch by extrusion granulation, thereby dispersing the toughening agent 2 in the polyester material for a first time, and then molding the polyester masterbatch into an injection or extrusion product by injection molding or extrusion molding, thereby dispersing the toughening agent 2 in the polyester material for a second time.

[0048] In one embodiment of the present invention, in order to improve the dispersibility and compatibility of the toughening agent 2 (POE) in the polyester resin substrate 1, the melt flow index of the polyester resin substrate 1 and the melt flow index of the toughening agent 2 have a corresponding relationship.

[0049] Specifically, the polyester resin substrate 1 (PET) has a first melt flow index, and the toughening agent 2 (POE) has a second melt flow index. In particular, the first melt flow index of the polyester resin substrate 1 is 55 g / 10 min to 65 g / 10 min. The second melt flow index of the toughening agent 2 is 75 to 125% of the first melt flow index of the polyester resin substrate 1, and preferably 80 to 120%. For example, the first melt flow index of the polyester resin substrate 1 is about 60 g / 10 min, and the second melt flow index of the toughening agent 2 (POE) is about 50 g / 10 min.

[0050] It should be noted that the "melt flow index" (MI) in this specification is also called melt flow rate (MFR). The melt flow index is the weight of a polymer melt extruded from a standard orifice (2.095 mm) in 10 minutes at a certain temperature and pressure.

[0051] In one embodiment of the present invention, the polyester resin substrate 1 is a continuous phase, and the toughening agent 2 is a dispersed phase dispersed in the continuous phase. In particular, the dispersed phase and the continuous phase cooperate to form an island structure on the surface of the impact-resistant polyester material.

[0052] It should be explained that the "island structure" refers to a situation where the compatibility of two polymers (polyester resin substrate 1 and toughening agent 2) is poor, and when the two polymers are mixed, the dispersed phase is dispersed in the continuous phase, resulting in a non-homogeneous system, like islands dispersed in the sea. The mechanism by which the two phases of the island structure work can improve the polymer properties.

[0053] In one embodiment of the present invention, the impact-resistant polyester material 100 is formed into an injection or extrusion product (e.g., suitcases, safety helmets, electronic casings, food trays, electronic and automotive decorative films, etc.) by injection molding or extrusion molding. Generally, the impact-resistant polyester material 100 has a thickness of 800 to 4,000 μm after injection molding or extrusion molding.

[0054] Due to the above-mentioned configuration, the impact-resistant polyester material 100 has excellent physicochemical properties. Specifically, the impact-resistant polyester material satisfies at least one of the following conditions: (i) the polyester material has an impact strength of 20 to 50 kg-cm / cm, (ii) the polyester material has a compressive strength of 1.15 to 1.30 g / cm 3(iii) the polyester material has a tensile strength of 38 to 50 MPa; (iv) the polyester material has a bending strength of 65 to 75 MPa; (v) the polyester material has a bending modulus of 1,800 to 2,200 MPa; (vi) the polyester material has a heat distortion temperature (HDT) of 55 to 80°C; (vii) the polyester material has a shrinkage of 0.7 to 1.0; and (viii) the polyester material has an HB level based on the plastic flammability standard UL94.

[0055] [Advantageous Effects of the Embodiments] As an advantageous effect of the present invention, the impact-resistant polyester material according to the present invention has the following technical features: "the toughening agent is dispersed in the polyester resin substrate and is a polyolefin elastomer (POE)", "the compatibilizer for improving the compatibility between the toughening agent and the polyester resin substrate is dispersed in the polyester resin substrate", "the compatibilizer is at least one of a polyolefin elastomer compatibilizer grafted with glyceryl methacrylate (POE-g-GMA) and a polyolefin elastomer compatibilizer grafted with maleic anhydride (POE-g-MAH)", and "the toughening agent is dispersed in the polyester resin substrate with a particle size of 0.5 to 1.5 μm by blending the compatibilizer", which greatly improves the impact strength of the polyester material and enhances the application value of the polyester material.

[0056] The above disclosure is merely a preferred embodiment of the present invention, and the scope of the claims of the present invention is not limited thereto. Therefore, all equivalent technical modifications made by utilizing the specification and drawings of the present invention are included in the scope of the claims of the present invention. [Explanation of symbols]

[0057] 100...Impact-resistant polyester material 1…Polyester resin substrate 2...Toughening agent

Claims

1. A polyester resin substrate; a toughening agent dispersed in the polyester resin substrate and being a polyolefin elastomer (POE); a compatibilizer dispersed in the polyester resin substrate to improve compatibility between the toughening agent and the polyester resin substrate; the compatibilizer is at least one of a glycidyl methacrylate grafted polyolefin elastomer compatibilizer (POE-g-GMA) and a maleic anhydride grafted polyolefin elastomer compatibilizer (POE-g-MAH); By blending the compatibilizer, the toughening agent is dispersed in the polyester resin substrate with a particle size of 0.5 to 1.5 μm, thereby imparting an impact strength of 20 kg-cm / cm or more to the impact-resistant polyester material; The content of the polyester resin base material is 70-95 wt %, the content of the toughening agent is 5-15 wt %, and the content of the compatibilizer is 2-15 wt %, based on the total weight of the impact-resistant polyester material being 100 wt %; the polyester resin substrate has a first melt flow index and the toughening agent has a second melt flow index; The first melt flow index of the polyester resin substrate is 55 g / 10 min to 65 g / 10 min, and the second melt flow index of the toughening agent is 75 to 125% of the first melt flow index of the polyester resin substrate.

2. 2. The impact-resistant polyester material according to claim 1, wherein the content of the polyester resin base material is 70-90 wt %, the content of the toughening agent is 7-10 wt %, and the content of the compatibilizer is 2-5 wt %, based on a total weight of the impact-resistant polyester material being 100 wt %.

3. 2. The impact resistant polyester material according to claim 1, wherein the content of the toughening agent is equal to or greater than the content of the compatibilizer, and the weight ratio of the toughening agent to the compatibilizer (the toughening agent:the compatibilizer) is 1:1 to 4:

1.

4. The impact resistant polyester material further comprises an antioxidant and a slip agent dispersed in the polyester resin matrix; 2. The impact-resistant polyester material according to claim 1, wherein the content of the antioxidant is 0.1-1.0 wt %, and the content of the slip agent is 0.1-1.0 wt %, based on a total weight of the impact-resistant polyester material being 100 wt %.

5. 2. The impact resistant polyester material of claim 1, wherein the molecular structures of the toughening agents are all polyolefin elastomers (POE), and the molecular structures of the compatibilizers have a main chain and side chains, and the main chain is polyolefin elastomers (POE).

6. the compatibilizer is a polyolefin elastomer compatibilizer grafted with glycidyl methacrylate (POE-g-GMA), the molecular structure of the compatibilizer has a main chain and a side chain melt-grafted to the main chain, the main chain being polyolefin elastomer (POE) and the side chain being glycidyl methacrylate (GMA); 2. The impact-resistant polyester material according to claim 1, wherein the glycidyl methacrylate undergoes a ring-opening reaction during kneading, and the epoxy group in the glycidyl methacrylate undergoes a chemical reaction with the ester group in the molecular structure of the polyester resin substrate after the ring-opening reaction, thereby dispersing the toughening agent in the polyester resin substrate.

7. 2. The impact-resistant polyester material according to claim 1, wherein the polyester resin base material is a continuous phase, the toughening agent is a dispersed phase dispersed in the continuous phase, and the dispersed phase and the continuous phase cooperate to form an island structure on the surface of the impact-resistant polyester material.

8. The impact-resistant polyester material meets the following requirements: (i) having an impact strength of 20 to 50 kg-cm / cm; (ii) 1.15-1.30g / cm ３ and having a density of (iii) having an HB level based on the flammability standard UL94; The impact-resistant polyester material according to any one of claims 1 to 7, which satisfies at least one of the following requirements.

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