Resin composition and manufacturing method thereof

Abstract

PURPOSE: To provide a resin composition and a manufacturing method thereof.SOLUTION: The present invention provides a resin composition, based on its total weight, including 35 wt.% to 55 wt.% of polyester, 0.1 wt.% to 1.0 wt.% of an antioxidant, 7.5 wt.% to 17.5 wt.% of a flame retardant, 25% to 32 wt.% of a filler reinforcement, and a compatibilizer equivalent to 5 wt.% to 15 wt.% of the added amount of the filler reinforcement.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a resin composition and a method for producing the same, and more particularly to a flame-retardant polyester resin composition and a method for producing the same. [Background technology]

[0002] Polyesters are widely used in the market and in daily life. How to select and tailor the composition of the corresponding polyester materials to make them adaptable to special or extensive use environments (e.g., potential high temperature environments and / or potential high stress environments) has become a hot topic of research. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides a resin composition that can be used to solve the above technical problems, and a method for producing the same. The resin composition may be at least flame retardant. [Means for solving the problem]

[0004] The resin composition of the present invention contains, relative to its total weight, 35% by weight to 55% by weight of polyester, 0.1% by weight to 1.0% by weight of an antioxidant, 7.5% by weight to 17.5% by weight of a flame retardant, 25% by weight to 32% by weight of a filling reinforcing material, and a compatibilizer equivalent to 5% by weight to 15% by weight of the added amount of the filling reinforcing material.

[0005] The method for producing a resin composition of the present invention is formed by at least a kneading extrusion method, and includes the following operations: A twin-screw kneading extruder is provided; 35% by weight to 55% by weight of polyester, 0.1% by weight to 1.0% by weight of antioxidant, 7.5% by weight to 17.5% by weight of flame retardant, 25% by weight to 32% by weight of filler reinforcing material, and a compatibilizer equivalent to 5% by weight to 15% by weight of the added amount of the filler reinforcing material are fed into the twin-screw extruder to perform melt-kneading modification to form a resin composition. Effect of the Invention

[0006] As described above, at least due to the above-mentioned composition of the resin composition and the corresponding ratios thereof, the resin composition can be at least flame retardant and have good processability. [Brief description of the drawings]

[0007] [Figure 1] 1 is a partial schematic flowchart of a method for producing a resin composition according to one embodiment of the present invention. [Diagram 2] 1 is a partial schematic view of a resin composition production apparatus according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In the following detailed description, for purposes of explanation and not limitation, exemplary embodiments are disclosed that show specific details for a thorough understanding of various principles of the invention. However, it will be apparent to those skilled in the art from this disclosure that the invention can be practiced in other embodiments that depart from the specific details disclosed herein. Moreover, descriptions of well-known devices, methods and materials may be omitted so as not to obscure the description of various principles of the invention.

[0009] Ranges may be expressed herein as from "about" one particular value to "about" another particular value, and therefore may be expressed directly as from one particular value and / or to another particular value. When a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it is understood that the particular value forms another embodiment. It is further understood that the endpoints of each range are either explicitly related to or independent of the other endpoint.

[0010] In the present invention, non-limiting terms (eg, may, can, for example, or other similar terms) refer to the optional or selective implementation, inclusion, addition, or presence.

[0011] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention belongs. It should be further understood that terms (such as those defined in commonly used dictionaries) should be interpreted to have a meaning consistent with their meaning in the relevant technical context, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0012] [polyester]

[0013] It should be noted that the term "polyester" (or "polyester material" and other similar terms) used herein refers to any type of polyester, particularly aromatic polyesters.

[0014] Further, the polyester here may be, for example, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or a combination thereof. In this embodiment, the polyester is preferably polyethylene terephthalate, polybutylene terephthalate, or a combination thereof. Furthermore, a copolymer may also be used, and the copolymer particularly refers to a copolymer obtained by using two or more dicarboxylic acids and / or two or more diol components.

[0015] Preferably, the polyester herein comprises a polyester derived from purified terephthalic acid (PTA) and ethylene glycol (EG) (ie, polyethylene terephthalate (PET)).

[0016] In one embodiment, the polyester material used in the present invention may include virgin polyester, recycled polyester, or a combination thereof (e.g., virgin PET, recycled PET (rPET), or a combination thereof).

[0017] In one embodiment, the polyester material used in the present invention or the polyester resin composition produced in the present invention may be in the form of chips, also called polyester chips.

[0018] In one embodiment, for polyester chips formed, produced or obtained by extrusion, taking balance weighing method as an example, the number of polyester chips is 80 or more, and 2 grams is used as the unit of measurement.

[0019] [Recycled polyester material]

[0020] The polyester recycling method includes, for example, collecting various kinds of polyester-containing waste. Corresponding classification can be performed according to the type, color, and / or intended use of the above-mentioned polyester-containing waste. The classified polyester-containing waste can then be compressed and packaged. The packaged polyester-containing waste can then be transported to a waste treatment plant. The above-mentioned polyester-containing waste may include, for example, recycled PET bottles, recycled polyester films, recycled polyester release films, recycled polyester fabric chips, and recycled polyester fishing net chips, but the present invention is not limited thereto.

[0021] The polyester recycling method further includes removing items (e.g., bottle caps, labels, and / or adhesives) on the polyester-containing waste. The polyester-containing waste is then physically and mechanically comminuted. The comminuted polyester material is separated by suitable means (such as flotation). The comminuted and separated polyester material is then dried to obtain a treated recycled polyester material.

[0022] In one embodiment, the recycled polyester material may include, for example, directly purchased treated recycled polyester material.

[0023] In one embodiment, the recycled polyester material may include waste material recycled during processing (e.g., edge trim material or other similar excess material cut off during processing). Such recycled materials are often referred to as post-industrial recycled materials.

[0024] The recycled polyester material obtained by the above method can be further formed into suitable recycled polyester chips by subsequent methods.

[0025] [Formation of recycled polyester materials]

[0026] In one embodiment, the recycled polyester material may include physically recycled polyester material or chemically recycled polyester material.

[0027] In one embodiment, the recycled polyester material may be melted into a molten melt. The melt may then be filtered through a filter screen to remove any solid impurities that may be present therein. The filtered melt may then be extruded into chips using an extruder (e.g., but not limited to, a commercially available single screw extruder (SSE), twin screw extruder (TSE), or other similar screw extruder) to physically form the recycled polyester material.

[0028] In one embodiment, the recycled polyester material can be depolymerized by chemical depolymerization. The above-mentioned product of the chemical depolymerization can then be esterified. The above-mentioned product of the esterification can then be polymerized. The material in the tank can then be extruded and / or cut into chips to form the chemically recycled polyester material, for example, by chip formation methods typically used for general polymer chips.

[0029] In one embodiment, if it is desired to adjust the inherent viscosity of recycled polyester material, a method of increasing viscosity may be carried out so that recycled polyester material has a corresponding inherent viscosity range. The method of increasing viscosity may include a solid viscosity increasing method or a liquid viscosity increasing method. However, the viscosity increasing method is often used to increase the inherent viscosity of physically recycled polyester material, but cannot be used to decrease the inherent viscosity of physically recycled polyester material.

[0030] [Nucleating agent]

[0031] Nucleating agents can increase the total crystallinity, thereby improving the heat resistance of polyesters. Nucleating agents can promote crystal growth, reduce crystal size, accelerate the crystallization rate, and reduce the formation of large spherical crystals, thereby reducing the possibility of embrittlement of polyesters.

[0032] In an embodiment, the nucleating agent may comprise an organic nucleating agent, an inorganic nucleating agent, or a polymer blend thereof.

[0033] In one embodiment, the inorganic nucleating agent may include a mineral, a metal oxide, a silicon compound, a metal salt of an inorganic acid, a glass powder, a metal powder, or a combination thereof. The aforementioned mineral may include, for example, talc powder, titanium dioxide powder, silicon dioxide, calcium carbonate, graphite, talc, or kaolinite, but the present invention is not limited thereto. The aforementioned metal oxide may include, for example, zinc oxide, aluminum oxide, magnesium oxide, or a combination thereof, but the present invention is not limited thereto. The aforementioned silicon compound may include, for example, silicon oxide, calcium silicate, magnesium silicate, or a combination thereof, but the present invention is not limited thereto. The aforementioned metal salt of an inorganic acid may include, for example, metal carbonates such as magnesium carbonate, calcium carbonate, sodium carbonate, and potassium carbonate, barium sulfate, calcium sulfate, or a combination thereof, but the present invention is not limited thereto.

[0034] In one embodiment, the organic nucleating agent may include a metal salt of an inorganic acid, a metal salt of an aromatic phosphate ester, a polyol derivative, and a sulfonimide compound. The metal salt of the organic acid mentioned above may include, for example, sodium benzoate, sodium octadecenoate, EMAA (Surlyn, manufactured by DuPont), aluminum p-tert-butylbenzoate, or a combination thereof, but the present invention is not limited thereto. The metal salt of the phosphate ester mentioned above may include, for example, a metal salt of an aromatic phosphate ester, but the present invention is not limited thereto. The polyol derivative mentioned above may include, for example, dibenzylidene sorbitol, but the present invention is not limited thereto.

[0035] In one embodiment, the size of the nucleating agent may be at the micrometer (μm) level or at the nanometer (nm) level, i.e., the nucleating agent may include a micrometer powder, a nanometer powder, or a micro-nano powder.

[0036] In one embodiment, in consideration of heat resistance, the nucleating agent is preferably a complex or mixture of an organic nucleating agent and an inorganic nucleating agent. In one embodiment, the weight ratio of the organic nucleating agent to the inorganic nucleating agent may be about 2:1 to 1:1.

[0037] [Flame retardant]

[0038] In the present specification, "flame retardant" means that the referenced object (e.g., a film, layer, or structure) can pass the flame retardant standard of a standard test method. For example, in the UL94 plastic flammability standard (Test for Flammability of Plastic Materials for Parts in Devices and appliances) issued by UL (Underwriters Laboratories Inc.), "flame retardant" may be at least HB level, and preferably V0 level or higher (e.g., V0 level, 5VB level, or 5VA level).

[0039] In one embodiment, the flame retardant may include a halogenated flame retardant or a halogen-free flame retardant. If a halogenated flame retardant is used, it generally must at least meet the standards of the Restriction of Hazardous Substances Directive 2002 / 95 / EC (RoHS).

[0040] In one embodiment, the flame retardant may include an ether compound.The above-mentioned ether compound may include, for example, ethyl perfluorobutyl ether (CAS number: 163702-05-4), ethyl nonafluoroisobutyl ether (CAS number: 163702-06-5), or a combination thereof, but the present invention is not limited thereto.

[0041] In one embodiment, the flame retardant may include an organophosphorus compound. Examples of the organic phosphorus compound include 2-carboxyethyl(phenyl)phosphinic acid (CAS number: 14657-64-8), [(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)methyl]butanedioic acid (CAS number: 63562-33-4), and [(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)methyl]butanedioic acid bis(2-hydroxyethyl) ester. ester) (CAS number: 63562-34-5), bis(4-hydroxybutyl) 2-[(9,10-dihydro-9-oxa-10-oxide-10-phosphaphenanthren-10-yl)methyl]succinate and 1,4-butanediol 1,4-Butanediol (CAS number: 73755-18-7), 10-benzylmethyl-9-oxa-10-phosphaphenanthrene-10-oxide (CAS number: 113504-81-7), 6,6'-(1-phenylethane-1,2-diyl)bis(6H-dibenzo[c,e][1,2]oxaphosphinine)6,6'-dioxide (CAS number: 1631149-46-6), or combinations thereof, but the present invention is not limited thereto.

[0042] In one embodiment, the flame retardant may include an organic bromine compound. The organic bromine compound may include, for example, dibromomethane, 1,2-dibromoethane, 1,2-dibromoethylene, 1,4-dibromobutane, 1,5-dibromopentane, 2,3-dibromo-2-propen-1-ol, brominated polystyrene, decabromodiphenyl ethane (DBDPE), brominated epoxy resin, tetrabromobisphenol A (TBBPA), or a combination thereof, but the present invention is not limited thereto.

[0043] In one embodiment, provided that a flame retardant is included, a flame retardant synergist may be added.

[0044] In one embodiment, the flame retardant synergist may include sodium antimonate (NaSbO3), antimony trioxide (Sb2O3, ATO), polytetrafluoroethylene (PTFE, commonly known as Teflon), or a combination thereof.

[0045] Flame retardants and flame retardant synergists can produce a synergistic effect, resulting in an overall flame retardant effect that exceeds the sum of the effects of the individual components (e.g., flame retardant alone or flame retardant synergist alone). For example, antimony trioxide has little flame retardant effect when used alone, but the flame retardant effect of the halogen flame retardant can be improved by adding antimony trioxide compared to when the halogen flame retardant is used alone.

[0046] [Antioxidants]

[0047] During the formation or use of a polymer, polymer degradation or unexpected reactions may occur due to heat, high-energy radiation (e.g., exposure to UV light), mechanical stress, residual catalysts, reactions with other impurities, contact with oxidizing agents during use, or other potential factors. The potential causes of the above-mentioned polymer degradation or unexpected reactions are the generation of peroxy radicals, other possible free radicals, or peroxides in the polymer or its products due to heat, high-energy radiation, mechanical stress, or other factors. These free radicals and peroxides may react with oxygen or water vapor in the air to generate more free radicals / peroxides, thereby triggering the corresponding vicious cycle reactions. As a result of the above-mentioned vicious cycle reactions, the polymer or its products may become more susceptible to damage (e.g., crack formation, rupture, or discoloration), which may result in the deterioration or loss of the original physical properties.

[0048] Therefore, the addition of antioxidants can suppress the above-mentioned vicious circle reaction, probably because they (i.e., antioxidants) react with the above-mentioned free radicals or peroxides, thereby reducing the possibility of the above-mentioned vicious circle reaction.

[0049] However, it should be noted that if the amount of antioxidant added is too large (for example, if the ratio of the antioxidant is 2 wt % or more, or 1.0 wt % or more, relative to the total weight of the resin composition), excessive color deviation may be caused in the appearance of the resin composition.

[0050] In one embodiment, the antioxidant may include phenols, amines, phosphate esters, thioesters, or a combination thereof.

[0051] In one embodiment, the antioxidants can be used in products commercially available under trade / brand names such as, for example, Irganox 1010, Irganox 1425, Irganox 245, Anox 1315, Anox PP18, Anox 20, Lowinox 1790, Lowinox TBM-68, Naugard 445, Sandostab P-EPQ, Irgafos 168, and Naugard 412S.

[0052] [Filling reinforcement material]

[0053] In processed parts made of a resin composition, the mechanical strength, abrasion resistance, and / or non-flammability of the above-mentioned processed parts can be improved by adding a filler reinforcing material to the resin composition.

[0054] In one embodiment, the filler reinforcement material can be selected from glass fiber (GF), carbon fiber, or Kevlar fiber (Kevlar is a registered trademark).

[0055] In one embodiment, the glass fiber is a chopped strand glass fiber. In one embodiment, the glass fiber has a length of 3.0 millimeters (mm) to 4.0 millimeters (mm) and a diameter of 10 micrometers (μm) to 13 micrometers (μm).

[0056] In one embodiment, the bonding strength between the filler reinforcing material and the polyester can be enhanced by appropriately modifying the surface of the filler reinforcing material.

[0057] In one embodiment, the surface of the glass fiber can be modified with a suitable surface modifier, so as to adjust the hydrophilicity and hydrophobicity of the glass fiber surface and improve the bonding force between the glass fiber and polyester. In one embodiment, the above-mentioned surface modifier can include a siloxane coupling agent with a corresponding reactive functional group (e.g., vinyl group, amino group, epoxy group), but the present invention is not limited thereto.

[0058] [Compatibilizer]

[0059] Provided that a filler reinforcing material is included, the compatibilizer can improve the compatibility between the filler reinforcing material and the polyester, and can improve the filling and / or reinforcing effect of the filler reinforcing material.

[0060] In one embodiment, the compatibilizer comprises ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA), glycidyl methacrylate functionalized polyolefin elastomers (POE-g-GMA), glycidyl methacrylate functionalized polyethylene (PE-g-GMA), or combinations thereof.

[0061] [Flow aid]

[0062] When the corresponding polyester is formed by melt-kneading extrusion, the external force required for polyester processing (e.g., mechanical torque when injecting polyester raw materials) can be reduced by adding the processing flow aid, thus reducing the possibility of polymer chain scission.

[0063] In one embodiment, the flow aid has good thermal stability, low volatility, and good release and / or flow properties at high temperatures. In one embodiment, the processing flow aid may even have a good nucleating effect on partially crystalline polyesters.

[0064] In one embodiment, the processing flow aid may include, but is not limited to, stearic acid, stearates, stearic acid esters (e.g., pentaerythritol stearate (PETS)), polyethylene waxes, siloxane modified materials, fluoropolymer resins, or combinations thereof.

[0065] [Method for producing flame-retardant polyester resin composition]

[0066] Hereinafter, a method for producing the flame-retardant polyester resin composition will be described by way of example.

[0067] Referring to step S10 of FIG. 1 and to FIG. 2, an extruder 100 is provided.

[0068] The extruder may be, for example, a commercially available twin screw extruder (TSE) or other similar screw extruder, but the invention is not limited thereto, and the invention does not provide detailed descriptions of the construction and / or operation of the commercially available screw extruders mentioned above.

[0069] In one embodiment, at least one set of feeders (e.g., side feeders) may be attached to the extruder. The feeders may be loss-in-weight feeders equipped with loss-in-weight weighers. The above-mentioned feeders may also be common commercially available equipment and / or optional accessories. That is, the components of the above-mentioned polyester blends may be mixed before or during feeding, or may be fed to the extruder through different feeders and then mixed in the extruder.

[0070] Taking Figure 2 as an example, along the extrusion direction (e.g., from the polyester mixture feed location to the location where the polyester composition is extruded or squeezed), three sets of feeders can be attached to the extruder 100 (the order can be a first feeder 111, a second feeder 112, and a third feeder 113). Each set of feeders can be a single feeder or an assembly of multiple feeders.

[0071] In this embodiment, as shown in Figure 2, the extruder 100 can have a heating zone. In this way, after the polyester mixture is fed into the extruder, the polyester mixture in the extruder can be mixed and heated accordingly, and can be extruded or squeezed out after forming the corresponding polyester composition by melt mixing.

[0072] Taking FIG. 2 as an example, along the extrusion direction (e.g., the direction from the polyester mixture feed position to the position where the polyester composition is extruded or squeezed), the heating zones can include a first heating zone R1, a second heating zone R2, a third heating zone R3, and a fourth heating zone R4.

[0073] In one embodiment, the heating temperature of the third heating zone R3 may be higher than or equal to the heating temperature of the second heating zone R2, and / or the heating temperature of the second heating zone R2 may be higher than or equal to the heating temperature of the first heating zone R1.

[0074] In one embodiment, the heating temperature of the first heating zone R1 may be between about 230 and 250°C, the heating temperature of the second heating zone R2 may be between about 250 and 270°C, the heating temperature of the third heating zone R3 may be between about 255 and 275°C, and the heating temperature of the fourth heating zone R4 may be between about 245 and 265°C.

[0075] In one embodiment, each heating zone is heated to a corresponding temperature prior to feeding (commonly referred to as preheating).

[0076] In this embodiment, the extruder 100 may be connected to an air extraction system 120, as shown in Figure 2. The air extraction system may include a common extraction pump and corresponding gas lines. The extruder may vent-up or improve ventilation efficiency via the air extraction system.

[0077] In one embodiment, along the extrusion direction, the first heating zone R1 may correspond to the first feeder 111 and is located before the second feeder 112. The second heating zone R2 may correspond to the second feeder 112 and is located before the third feeder 113. The third heating zone R3 may correspond to the third feeder 113 and is located before a vent connected to the air extraction system 120. The fourth heating zone R4 may correspond to a vent connected to the air extraction system 120 and is located before the location where the polyester composition is extruded or squeezed.

[0078] Referring to step S20 of FIG. 1 and FIG. 2, at least a polyester material, an antioxidant and a compatibilizer are fed into an extruder 100 via a first feeder 111 for corresponding melt-kneading modification.

[0079] In one embodiment, a nucleating agent can be further fed into the extruder 100 via a first feeder 111 for corresponding melt-kneading modification.

[0080] In one embodiment, a flow aid can be further fed into the extruder 100 via a first feeder 111 to perform corresponding melt-kneading modification.

[0081] Referring to step S30 of FIG. 1 and FIG. 2, at least the flame retardant is fed into the extruder 100 via the second feeder 112 for corresponding melt-kneading modification.

[0082] In one embodiment, a flame retardant coagent can be further fed into the extruder 100 via a second feeder 112 for corresponding melt-kneading modification.

[0083] Referring to step S40 of FIG. 1 and FIG. 2, at least the filling reinforcing material is fed into the extruder 100 via the third feeder 113, and undergoes corresponding melt-kneading modification.

[0084] According to the above-mentioned embodiment, after the polyester-containing mixture is fed into the extruder 100, the polyester-containing mixture in the extruder 100 can be extruded and heated accordingly, and then extruded or squeezed out after forming the corresponding polyester composition through the corresponding melt-kneading modification by the thermal extrusion reaction.

[0085] In one embodiment, the extruded or extruded polyester composition can be formed into polyester chips by cutting into chips.

[0086] In one embodiment, the weight percentage of the polyester material fed to the extruder 100 may be about 35 wt% to 55 wt% based on the total weight of the mixture fed to the extruder 100.

[0087] In one embodiment, the intrinsic viscosity of the polyester material fed to extruder 100 may be between about 0.55 dL / g and 0.76 dL / g, and the polyester material fed to extruder 100 may include virgin polyester material, recycled polyester material, or a mixture or combination thereof.

[0088] In one embodiment, the weight percentage of the nucleating agent relative to the total weight of the mixture fed to the extruder 100 may be about 1 wt% to 5 wt%, and preferably about 2 wt% to 3 wt%.

[0089] In one embodiment, the nucleating agent may include a corresponding organic nucleating agent and a corresponding inorganic nucleating agent. In one embodiment, the weight of the organic nucleating agent is about 1 to 2 times the weight of the inorganic nucleating agent (e.g., the weight of the organic nucleating agent: the weight of the inorganic nucleating agent ≈ 2:1 to 1:1).

[0090] In one embodiment, the total weight percentage of the flame retardant may be about 7.5 wt% to 17.5 wt% of the total weight of the mixture fed to the extruder 100.

[0091] In one embodiment, the total weight ratio of the flame retardant and the flame retardant co-agent to the total weight of the mixture fed into the extruder 100 may be about 10 wt% to 20 wt%, and preferably about 12 wt%.

[0092] In one embodiment, the flame retardant may include decabromodiphenylethane and the corresponding flame retardant synergist may include an antimony-containing flame retardant synergist (eg, sodium antimonate, antimony trioxide, or a combination thereof).

[0093] In one embodiment, the weight of the flame retardant is about 3 to 7 times the weight of the flame retardant synergist (i.e., weight of flame retardant: weight of flame retardant synergist ≈ 3:1 to 7:1), and preferably, the weight of the flame retardant is about 5 times the weight of the flame retardant synergist (i.e., weight of flame retardant: weight of flame retardant synergist ≈ 5:1).

[0094] In one embodiment, the flame retardant may include decabromodiphenylethane, and the corresponding flame retardant coagent may include an antimony-containing flame retardant coagent (e.g., sodium antimonate, antimony trioxide, or a combination thereof). Furthermore, the total weight ratio of the flame retardant and the flame retardant coagent to the total weight of the mixture fed to the extruder may be about 12 wt%, in which the weight of the flame retardant is about 5 times the weight of the flame retardant coagent.

[0095] In one embodiment, the weight percentage of the antioxidant may be between about 0.1 wt % and 1.0 wt %, based on the total weight of the mixture fed to the extruder 100 .

[0096] In one embodiment, the weight percentage of the reinforcing filler may be about 25 wt% to 32 wt% of the total weight of the mixture fed to the extruder 100.

[0097] In one embodiment, the weight ratio of the compatibilizer to the total weight of the mixture fed to the extruder 100 corresponds to 5 wt % to 15 wt % of the amount of reinforcing filler added.

[0098] In one embodiment, the weight percentage of the flow aid may be about 0.05 wt% to 1 wt% based on the total weight of the mixture fed to the extruder 100.

[0099] [Examples and Comparative Examples]

[0100] The following examples and comparative examples are presented to specifically explain the present invention, and the present invention is not limited to the following examples.

[0101] [Example]

[0102] In the method of the above-mentioned embodiment, a polyester composition is formed. Further, the above-mentioned embodiment includes the following steps or parameters:

[0103] In the same or similar manner as in step S10 of FIG. 1 and FIG. 2, an extruder similar or identical to the extruder 100 is provided. The heating temperature of the heating zone similar or identical to the first heating zone R1 is about 230-250° C., the heating temperature of the heating zone similar or identical to the second heating zone R2 is about 250-270° C., the heating temperature of the heating zone similar or identical to the third heating zone R3 is about 255-275° C., and the heating temperature of the heating zone similar or identical to the fourth heating zone R4 is about 245-265° C. In addition, an air extraction system similar or identical to the air extraction system 120 is started to vent the extruder.

[0104] Same or similar to step S20 of FIG. 1 and FIG. 2, polyester material, antioxidant, compatibilizer, nucleating agent, and flow aid are fed into the extruder through a feeder same or similar to the first feeder 111, and corresponding melt-kneading modification is carried out.

[0105] In the same or similar manner as in step S30 of FIG. 1 and FIG. 2, the flame retardant and the flame retardant co-agent are fed into the extruder through a feeder which is the same as or similar to the second feeder 112, and the corresponding melt-kneading modification is carried out.

[0106] In the same or similar manner as step S40 in FIG. 1 and FIG. 2, the filling reinforcing material is fed into the extruder through a feeder which is the same as or similar to the third feeder 113, and undergoes corresponding melt-kneading modification.

[0107] With respect to the total weight of the mixture (including polyester material, antioxidant, compatibilizer, nucleating agent, flow aid, flame retardant, flame retardant auxiliary, and filler reinforcement) fed to the extruder, the weight ratio of the antioxidant may be about 0.1 wt% to 1.0 wt%, the weight ratio of the compatibilizer may be about 5 wt% to 15 wt%, the weight ratio of the nucleating agent may be about 2 wt% to 3 wt%, the weight ratio of the flow aid may be about 0.05 wt% to 1 wt%, the total weight ratio of the flame retardant and flame retardant auxiliary may be about 12 wt%, the weight ratio of the filler reinforcement may be about 25 wt% to 32 wt%, and the remainder may be polyester material. The polyester material may be polyethylene terephthalate, and its intrinsic viscosity may be about 0.55 dL / g to 0.76 dL / g. Intrinsic viscosity (IV) can be increased by viscosity increasing techniques, including solid viscosity increasing techniques or liquid viscosity increasing techniques.

[0108] Through the steps and parameters of the above [Example], the extruded or squeezed polyester composition can have the properties shown in Table 1 below.

[0109] [Comparative Example 1]

[0110] By using the same or similar extruder as used in the Examples and applying the same or similar parameters (e.g., temperature, ventilation conditions) to carry out the corresponding thermal extrusion reaction, the corresponding polyester composition can be obtained.

[0111] In the same or similar manner as step S20 in FIG. 1 and FIG. 2, polybutylene terephthalate (PBT) is fed into an extruder through a feeder which is the same or similar to the first feeder 111, and undergoes corresponding melt-kneading modification.

[0112] In the same or similar manner as step S40 in FIG. 1 and FIG. 2, the filling reinforcing material is fed into the extruder through a feeder which is the same as or similar to the third feeder 113, and undergoes corresponding melt-kneading modification.

[0113] Based on the total weight of the mixture (including polybutylene terephthalate and the filler reinforcing material) fed to the extruder, the weight ratio of the filler reinforcing material may be about 30 wt %, with the remainder being polybutylene terephthalate.

[0114] The polyester composition extruded or squeezed through the steps and parameters of [Comparative Example 1] above can have the properties shown in Table 1 below.

[0115] [Comparative Example 2]

[0116] By using the same or similar extruder as used in the Examples and applying the same or similar parameters (e.g., temperature, ventilation conditions) to carry out the corresponding thermal extrusion reaction, the corresponding polyester composition can be obtained.

[0117] In the same or similar manner as step S20 in FIG. 1 and FIG. 2, the polyester material is fed into the extruder through a feeder which is the same or similar to the first feeder 111, and undergoes corresponding melt-kneading modification.

[0118] The polyester material used in [Comparative Example 2] is substantially the same as or similar to the polyester material used in [Example].

[0119] The polyester composition extruded or squeezed through the steps and parameters of [Comparative Example 2] above can have the properties shown in Table 1 below.

[0120] [Comparative Example 3]

[0121] By using the same or similar extruder as used in the Examples and applying the same or similar parameters (e.g., temperature, ventilation conditions) to carry out the corresponding thermal extrusion reaction, the corresponding polyester composition can be obtained.

[0122] In the same or similar manner as step S20 in FIG. 1 and FIG. 2, the polyester material is fed into the extruder through a feeder which is the same or similar to the first feeder 111, and undergoes corresponding melt-kneading modification.

[0123] In the same or similar manner as step S40 in FIG. 1 and FIG. 2, the filling reinforcing material is fed into the extruder through a feeder which is the same as or similar to the third feeder 113, and undergoes corresponding melt-kneading modification.

[0124] The polyester material used in [Comparative Example 3] is substantially the same as or similar to the polyester material used in [Example].

[0125] Based on the total weight of the mixture (including polybutylene terephthalate and the filler reinforcing material) fed to the extruder, the weight percentage of the filler reinforcing material may be about 30 wt %, with the remainder being the polyester material.

[0126] Through the steps and parameters of [Comparative Example 3] above, the polyester composition extruded or squeezed can have the properties shown in Table 1 below.

[0127] [Comparative Example 4]

[0128] Commercially available 30% glass fiber reinforced polyethylene terephthalate (such as PET engineering plastic with brand number 4410G6 manufactured by Nan Ya Plastics Corporation) is used directly, which can have the following properties in Table 1:

[0129] [Table 1]

[0130] In the above examples and comparative examples, the evaluation methods or criteria may be the same as or similar to the following:

[0131] Specific Gravity: Tested according to ASTM D 792 test standard.

[0132] Izod impact strength: Tested according to ASTM D 256 test standard.

[0133] Tensile strength and / or elongation: Tested according to ASTM D 638 test standard. Sample size (mm): (165±2)×(19±0.2)×(3.2±0.2), tensile speed: 50mm / min.

[0134] Flexural strength and / or flexural modulus: Tested according to ASTM D 790 test standard. Sample size (mm): (127±2)×(12.7±0.2)×(3.2±0.2), bending speed is 13mm / min.

[0135] Flame Retardancy: Based on the UL94 plastic flammability standard issued by the US UL company, the order from lowest (lowest flame retardancy) to highest (highest flame retardancy) is HB, V2, V1, V0, 5VB, 5VA.

[0136] Heat deflection temperature (HDT): Tested according to ASTM D 648 test standard. A higher HDT value indicates that the corresponding deformation occurs at a higher temperature, and a lower HDT value indicates that the corresponding deformation occurs at a lower temperature.

[0137] Melt index (MI): Tested according to ASTM D 1238 test standard. The higher the MI value, the higher the fluidity, and the lower the MI value, the lower the fluidity.

[0138] The polyester composition of Comparative Example 2 is insufficiently evaluated for impact strength, tensile strength, elongation, bending strength, bending rate, etc., and it may be difficult to perform corresponding processing. Furthermore, the polyester composition of Comparative Example 2 has low flame retardancy.

[0139] The melt index of the polyester composition of Comparative Example 4 is too low (<30 grams), so it is difficult to process it into a thin injection product with a thickness of less than 1 mm.

[0140] Compared with [Comparative Example 1] to [Comparative Example 4], the polyester composition of the above example can have better flame retardancy and / or higher heat distortion temperature. Furthermore, since the polyester composition of the above example has a relatively high melt index, it can be suitable for processing into thinner (e.g., less than 1 mm) injection products (e.g., connector adapters).

[0141] Compared with [Comparative Example 1] to [Comparative Example 4], the evaluation of general processability parameters such as impact strength, tensile strength, elongation, flexural strength, and / or flexural modulus of the polyester composition of the above examples can meet or even exceed applicable standards. For example, the polyester composition of the above examples has a high Izod impact strength, so that the polyester composition of the examples or a processed product thereof is relatively hard to break when it is subjected to an impact by an external force. [Industrial Applicability]

[0142] Furthermore, the polyester composition (which may be in chip or flake form) formed by the method for producing the polyester composition of the above-mentioned embodiment of the present invention can be directly or indirectly applied to existing plastic film / injection molding process equipment or technology, and further processed into other products suitable for daily life, industry, or suitable applications, such as, for example, products used in high heat and / or high external stress environments, such as industrial connectors, fans, relays, etc., although the present invention is not limited thereto. [Explanation of symbols]

[0143] 100 Extruder 111, 112, 13 Feeder 120 Air Extraction System R1, R2, R3, R4 Heating Zones S310~S330 Step

Claims

1. A resin composition comprising, relative to a total weight of the resin composition: 35 wt % to 55 wt % polyester; 0.1 wt % to 1.0 wt % of an antioxidant; 7.5 wt % to 17.5 wt % of a flame retardant; 25 wt % to 32 wt % of a filling reinforcing material; A compatibilizer equivalent to 5 wt % to 15 wt % of the amount of the filling reinforcing material; A resin composition comprising:

2. The resin composition according to claim 1, which has a UL94 plastic flammability standard V0 level or higher.

3. 2. The resin composition according to claim 1, wherein the polyester comprises polyethylene terephthalate having an intrinsic viscosity of 0.55 dL / g to 0.76 dL / g.

4. The resin composition of claim 1 further comprising 1 wt % to 5 wt % of a nucleating agent.

5. The resin composition according to claim 4 , wherein the nucleating agent comprises an inorganic nucleating agent and an organic nucleating agent.

6. 10. The resin composition of claim 1, further comprising 0.05 wt % to 1 wt % of a flow aid.

7. The resin composition according to claim 1, further comprising 1.5 wt % to 5 wt % of a flame retardant auxiliary.

8. The resin composition according to claim 7, wherein the weight of the flame retardant is 3 to 7 times the weight of the flame retardant auxiliary.

9. At least formed by melt kneading modification, Providing an extruder; Supplying 35 wt% to 55 wt% of polyester, 0.1 wt% to 1.0 wt% of antioxidant, 7.5 wt% to 17.5 wt% of flame retardant, 25 wt% to 32 wt% of filler reinforcement, and a compatibilizer equivalent to 5 wt% to 15 wt% of the amount of filler reinforcement to the extruder, and performing corresponding melt-kneading modification to form a resin composition; A method for producing a resin composition comprising the steps of:

10. The method for producing a resin composition according to claim 9 , wherein the melt-kneading and modifying step includes heating the resin composition through the extruder.

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