Resin composition and preparation method thereof

Abstract

The invention provides a resin composition. Based on the total weight of the resin composition, the resin composition comprises 35-55 wt% of polyester, 0.1-1.0 wt% of an antioxidant, 7.5-17.5 wt% of a flame retardant, 25-32 wt% of a filling reinforcing material and 5-15 wt% of a compatilizer, wherein the amount of the compatilizer is equal to the adding amount of the filling reinforcing material.

Description

Technical Field

[0001] The invention relates to a resin composition and a preparation method thereof, in particular to a flame retardant polyester resin composition and a preparation method thereof. Background Art

[0002] Polyesters are widely used in the market and in daily life. How to make the corresponding polyester suitable for special or wide-range use environments (such as high heat environments and / or high external force environments) through the selection and formulation of composition formulas has become a research topic. Summary of the invention

[0003] The present invention is directed to a resin composition and a method for making the same. The resin composition is at least flame retardant.

[0004] According to an embodiment of the present invention, the resin composition includes, based on its total weight, 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 material, and 5 wt % to 15 wt % of compatibilizer equivalent to the amount of filler reinforcement material added.

[0005] According to an embodiment of the present invention, a method for preparing a resin composition is formed at least by a mixing and extruding method, which includes the following steps: providing a twin-screw mixing and extruding machine; and feeding 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 wt % to 32 wt % of a filler and reinforcing material, and 5 wt % to 15 wt % of a compatibilizer equivalent to the amount of the filler and reinforcing material added into the twin-screw extruder for melt mixing and modification to form a resin composition.

[0006] Based on the above, at least through the above composition of the resin composition and its corresponding ratio, the resin composition can at least be flame retardant and have good processability. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a partial flow chart of a method for manufacturing a resin composition according to an embodiment of the present invention.

[0008] Figure 2 It is a partial schematic diagram of a manufacturing device of a resin composition according to an embodiment of the present invention.

[0009] Description of Reference Numerals

[0010] 100: Extrusion machine

[0011] 111, 112, 113: Feeder

[0012] 120: Exhaust system

[0013] R1, R2, R3, R4: Heating zone

[0014] S10, S20, S30, S40: Steps DETAILED DESCRIPTION

[0015] In the following detailed description, for the purpose of illustration and not limitation, exemplary embodiments that disclose specific details are set forth to provide a thorough understanding of the various principles of the present invention. However, it will be apparent to one of ordinary skill in the art that, with the benefit of this disclosure, the present invention may be practiced in other embodiments that depart from the specific details disclosed herein. In addition, descriptions of well-known devices, methods, and materials may be omitted to avoid obscuring the description of the various principles of the present invention.

[0016] Ranges may be expressed herein as from "about" one particular value to "about" another particular value, which may also be expressed directly as one particular value and / or to another particular value. When expressing the range, another embodiment includes from the one particular value and / or to another particular value. Similarly, when a value is expressed as an approximation via the use of the antecedent "about," it will be understood that the particular value forms another embodiment. It will be further understood that the endpoints of each range may be clearly related to or independent of the other endpoint.

[0017] In this document, non-limiting terms (such as: may, can, for example or other similar terms) mean optional or optional implementation, inclusion, addition or existence.

[0018] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the relevant technical context and should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0019] [Polyester]

[0020] It should be noted that the term "polyester" (or "polyester material" or "polyester material" or the like) herein refers to any type of polyester, in particular to aromatic polyester.

[0021] In addition, the polyester herein may also be, for example, poly(trimethylene terephthalate), poly(butylene terephthalate), polyethylene naphthalate, or a combination thereof. In this embodiment, the polyester is preferably polyethylene terephthalate, poly(butylene terephthalate), or a combination thereof. In addition, copolymers may also be used, which particularly refer to copolymers obtained by using two or more dicarboxylic acids and / or two or more diol components.

[0022] Preferably, the polyester herein includes polyester derived from purified terephthalic acid (PTA) and ethylene glycol (EG) (ie, polyethylene terephthalate (PET)).

[0023] In one embodiment, the polyester material used in the present disclosure may include virgin polyester, recycled polyester, or a combination thereof, for example, virgin polyester (virgin PET), recycled polyester (recycled PET, rPET), or a combination thereof.

[0024] In one embodiment, the polyester material used in the present disclosure or the polyester resin composition produced by the present disclosure may be in the form of particles, which may be referred to as polyester chips.

[0025] In one embodiment, for the polyester pellets formed, manufactured or obtained by the extrusion method, taking a balance weighing method as an example, with 2 grams (g) as a unit, the number of the polyester pellets is greater than or equal to 80.

[0026] [Recycled polyester]

[0027] The polyester recycling method includes, for example, collecting various types of polyester-containing waste materials; classifying the aforementioned polyester-containing waste materials according to their types, colors and / or previous uses; then, compressing and packaging the classified polyester-containing waste materials; and then, transporting the packaged polyester-containing waste materials to a waste treatment plant. The aforementioned polyester-containing waste materials may include, for example, recycled PET bottles, recycled polyester films, recycled polyester release films, recycled polyester fabric pellets, and recycled polyester fishnet pellets, but the present invention is not limited thereto.

[0028] The polyester recycling method may further include: removing objects (such as bottle caps, labels and / or adhesives) from the polyester-containing waste material; then, physically and mechanically crushing the aforementioned polyester-containing waste material; then, separating the crushed polyester material using an appropriate method (such as flotation); and then, drying the crushed and separated polyester material to obtain a processed recycled polyester material.

[0029] In one embodiment, the recycled polyester material may also include, for example, recycled polyester material that has been processed by direct purchase.

[0030] In one embodiment, the recycled polyester material can also be waste material recycled during the processing (such as ear material or other similar redundant material removed during the processing). Such recycled materials are often referred to as industrial recycled materials.

[0031] The recycled polyester material obtained by the above method can be further formed into appropriate recycled polyester pellets by subsequent methods.

[0032] [Formation of recycled polyester]

[0033] In one embodiment, the recycled polyester material may include physically recycled polyester material or chemically recycled polyester material.

[0034] In one embodiment, the recycled polyester material may be melted to form a melt in a molten state. Then, the melt may be filtered through a filter to remove possible solid impurities therein. Thereafter, the filtered melt may be extruded and granulated through an extruder (such as a commercially available single screw extruder (SSE), a twin screw extruder (TSE) or other similar screw extruders, but not limited thereto) to form a physical recycled polyester material.

[0035] In one embodiment, the recycled polyester material can be depolymerized by chemical depolymerization. Then, the product after the chemical depolymerization reaction is subjected to an esterification reaction. Then, the product after the esterification reaction is subjected to a polymerization reaction. After that, for example, the material in the tank can be extruded and / or pelletized by a commonly used granulation method for general polymer pellets to form a chemically recycled polyester material.

[0036] In one embodiment, if the intrinsic viscosity of the recycled polyester material is to be adjusted, a viscosity increasing method may be used to make the recycled polyester material have a corresponding intrinsic viscosity range. The viscosity increasing method includes solid viscosity increasing or liquid viscosity increasing. However, the viscosity increasing method is more likely to be used to increase the intrinsic viscosity of the physical recycled polyester material, but cannot be used to reduce the intrinsic viscosity of the physical recycled polyester material.

[0037] [Nucleating agent]

[0038] Nucleating agents may increase the total crystallinity and thus improve the heat resistance of polyester. Nucleating agents may promote crystal growth, refine the crystal size, accelerate the crystallization rate and reduce the generation of larger spherulites, thus reducing the possibility of polyester embrittlement.

[0039] In one embodiment, the crystal nucleus agent may include an organic crystal nucleus agent, an inorganic crystal nucleus agent, or a blend thereof.

[0040] In one embodiment, the inorganic nucleating agent may include mineral materials, metal oxides, silicon compounds, metal salts of inorganic acids, glass powders, metal powders, or combinations thereof. The aforementioned mineral materials may include, but are not limited to, talc, titanium dioxide, silicon dioxide, calcium carbonate, graphite, talc, or kaolin. The aforementioned metal oxides may include, but are not limited to, zinc oxide, aluminum oxide, magnesium oxide, or combinations thereof. The aforementioned silicon compounds may include, but are not limited to, silicon oxide, calcium silicate, magnesium silicate, or combinations thereof. The aforementioned metal salts of inorganic acids may include, but are not limited to, metal carbonates such as magnesium carbonate, calcium carbonate, sodium carbonate, potassium carbonate, barium sulfate, calcium sulfate, or combinations thereof.

[0041] In one embodiment, the organic nucleating agent may include a metal salt of an inorganic acid, a metal salt of an aromatic phosphate, a polyol derivative, or a sulfonimide compound. The aforementioned metal salt of an organic acid may include, but is not limited to, sodium benzoate, sodium octadecenoate, EMAA ( DuPont), aluminum p-tert-butylbenzoate or a combination thereof. The aforementioned metal phosphate salt may include, but is not limited to, aromatic metal phosphate salts. The aforementioned polyol derivative may include, but is not limited to, dibenzylidene sorbitol.

[0042] In one embodiment, the size of the crystal nucleating agent may be in the micrometer (μm) level or the nanometer (nm) level. In other words, the crystal nucleating agent may include micrometer powder, nanometer powder or micro-nanometer powder.

[0043] In one embodiment, considering heat resistance, the crystal nucleus agent is preferably a composite or mixed organic crystal nucleus agent and inorganic crystal nucleus agent. In one embodiment, the weight ratio of the organic crystal nucleus agent to the inorganic crystal nucleus agent can be about 2:1 to 1:1.

[0044] [Flame retardant]

[0045] In this article, "flame retardant" means that the object (such as a film, layer or structure) can pass the flame retardancy standard of the standard test method. For example, taking the UL94 plastic flammability standard (Test for Flammability of Plastic Materials for Parts in Devices and Appliances) issued by Underwriters Laboratories Inc (UL) in the United States as an example, it is at least HB grade; preferably, it can be V0 grade or above (such as V0 grade, 5VB grade or 5VA grade).

[0046] In one embodiment, the flame retardant may include a halogen flame retardant or a halogen-free flame retardant. If a halogen flame retardant is used, it generally needs to at least comply with the standards of the Restriction of Hazardous Substances Directive 2002 / 95 / EC (RoHS).

[0047] In one embodiment, the flame retardant may include an ether compound, which may include but is not limited to ethyl perfluorobutyl ether (CAS No.: 163702-05-4), ethyl nonafluoroisobutyl ether (CAS No.: 163702-06-5), or a combination thereof.

[0048] In one embodiment, the flame retardant may include an organic phosphorus compound. The organic phosphorus compound may include, but is not limited to, 2-carboxyethyl (phenyl) phosphinic acid (CAS No.: 14657-64-8), [(6-oxido-6H-dibenzo [c, e] [1, 2] oxaphosphorin-6-yl) methyl] butanedioic acid (CAS No.: 63562-33-4), [(6-oxido-6H-dibenz [c, e] [1, 2] oxaphosphorin-6-yl) methyl] butanedioic acid bis (2-hydroxyethyl) ester (CAS No.: 63562-33-4), [(6-oxido-6H-dibenz [c, e] [1, 2] oxaphosphorin-6-yl) methyl] butanedioic acid bis(2-hydroxyethyl)ester; CAS No.: 63562-34-5), bis(4-hydroxybutyl)2-[(9,10-dihydro-9-oxa-10-oxide-10-phosphaphenanthren-10-yl)methyl]succinate and 1,4-Butanediol; CAS No. 73755-18-7), 10-benzylmethyl-9-oxa-10-phosphaphenanthrene-10-oxide; CAS No. 113504-81-7, 6,6'-(1-phenylethane-1,2-diyl)bis(6H-dibenzo[c,e][1,2]oxaphosphinine) 6,6'-dioxi de; CAS No. 1631149-46-6, or a combination thereof.

[0049] In one embodiment, the flame retardant may include an organic bromine compound. The organic bromine compound may include, but is not limited to, 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.

[0050] In one embodiment, in addition to including the flame retardant, a flame retardant synergist may also be added.

[0051] In one embodiment, the flame retardant synergist may include sodium antimonate (NaSbO 3 ), antimony trioxide (Sb 2 O 3 , ATO), polytetrafluoroethene (PTFE; commonly known as Teflon) or a combination thereof.

[0052] Flame retardants and flame retardant synergists can produce synergism, which can make the overall flame retardant effect higher than the sum of the effects of single components (such as flame retardant alone; or flame retardant synergist alone). For example, antimony trioxide alone has almost no flame retardant effect; compared with the use of halogen flame retardant alone, the addition of antimony trioxide can enhance the flame retardant effect of halogen flame retardant.

[0053] [Antioxidant]

[0054] During the formation or use of polymers, polymer degradation or unexpected reactions may occur due to heat, high-energy radiation (such as ultraviolet light irradiation), mechanical pressure, catalyst residues, reactions with other impurities, contact with oxidants during use, or other possibilities. The reasons for the aforementioned polymer degradation or unexpected reactions may be: peroxy radicals, other possible free radicals or peroxides may be generated in the polymer or its products due to heat, high-energy radiation, mechanical pressure or other reasons; and the aforementioned free radicals or peroxides may react with oxygen in the air or water vapor to produce more free radicals / peroxides, thereby triggering a corresponding vicious cycle reaction. The result of the aforementioned vicious cycle reaction may make the polymer or its products easily damaged (such as cracks, ruptures or discoloration), thereby reducing or losing its original physical properties.

[0055] Therefore, the aforementioned vicious cycle reaction can be inhibited by adding an antioxidant. The reason may be that the antioxidant reacts with the aforementioned free radicals or peroxides to reduce the possibility of the aforementioned vicious cycle reaction.

[0056] However, it is worth noting that if the amount of antioxidant added is too much (e.g., based on the total weight of the resin composition, the proportion of the antioxidant is greater than or equal to 2 weight %; or, greater than 1.0 weight %), it may cause the color deviation of the resin composition to be too large.

[0057] In one embodiment, the antioxidant may include phenolic compounds, amine compounds, phosphorous compounds, thioester compounds, or combinations thereof.

[0058] In one embodiment, the antioxidant may be commercially available products with trade names / brand names such as 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.

[0059] [Filling reinforcement material]

[0060] In a workpiece made from a resin composition, the filler reinforcement added to the resin composition may improve the mechanical strength, wear resistance and / or non-flammability of the workpiece.

[0061] In one embodiment, the filling reinforcement material may be selected from glass fiber (GF), carbon fiber or kevlar fiber.

[0062] In one embodiment, the glass fiber is a chopped strand glass fiber. In one embodiment, the glass fiber has a length between 3.0 and 4.0 millimeters (mm) and a diameter between 10 and 13 micrometers (μm).

[0063] In one embodiment, the filling reinforcement material may be subjected to appropriate surface modification to enhance the bonding strength between the filling reinforcement material and the polyester.

[0064] In one embodiment, the surface of the glass fiber can be modified by using an appropriate surface modifier to adjust the hydrophilicity and hydrophobicity of the surface of the glass fiber, thereby improving the bonding strength between the glass fiber (i.e., at least the glass fiber after the surface modification) and the polyester. In one embodiment, the surface modifier may include a siloxane coupling agent having a corresponding reactive functional group (e.g., a vinyl group, an amino group, an epoxy group), but the present invention is not limited thereto.

[0065] [Compatibilizer]

[0066] Under the premise of including a filling reinforcement material, the compatibilizer can improve the compatibility between the filling reinforcement material and the polyester, thereby improving the filling and / or reinforcement effect of the filling reinforcement material.

[0067] In one embodiment, the compatibilizer includes ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA), glycidyl methacrylate functionalized polyolefinelastomers (POE-g-GMA), glycidyl methacrylate functionalized polyethylene (PE-g-GMA), or a combination thereof.

[0068] [Flow aid]

[0069] If the corresponding polyester is formed by melt mixing and extrusion, the addition of processing flow aids may reduce the external force required for polyester processing (such as mechanical torque when the polyester raw material is ejected). In this way, the possibility of polymer molecular chain scission may be reduced.

[0070] In one embodiment, the flow aid has good thermal stability, low volatility, and good mold release and / or flow properties at high temperatures. In one embodiment, the processing flow aid may have a good nucleating effect even on partially crystalline polyesters.

[0071] In one embodiment, the processing flow aid may include stearic acid, stearate, stearic acid ester (such as pentaerythritol stearate (PETS)), polyethylene wax, silicone modification, fluorine resin or a combination thereof, but the present invention is not limited thereto.

[0072] [Method for producing flame-retardant polyester resin composition]

[0073] A method for preparing the flame retardant polyester resin composition is exemplarily described as follows.

[0074] Please refer to Figure 1 Step S10 and Figure 2 , an extruder 100 is provided.

[0075] The extruder is, for example, a commercially available twin screw extruder (TSE) or other similar screw extruders, but the present invention is not limited thereto. In addition, the present invention does not describe in detail the structure and / or operation of the commercially available screw extruder.

[0076] In one embodiment, at least one set of feeders (e.g., side feeders) may be attached to the extruder. The feeder may be a loss-in-weight feeder equipped with a loss-in-weight meter. The aforementioned feeder is also a common commercially available device and / or optional accessory. That is, the various components of the aforementioned polyester mixture may be mixed before or during feeding; or, they may be fed into the extruder via different feeders and mixed in the extruder.

[0077] by Figure 2 For example, along the extrusion direction (e.g., from the polyester mixture feeding point to the polyester composition being extruded or extruded point), three sets of feeders (which may be sequentially referred to as: first feeder 111, second feeder 112, and third feeder 113) may be attached to the extruder 100. Each set of feeders may be a single feeder or an assembly of multiple feeders.

[0078] In this embodiment, Figure 2 As shown, the extruder 100 may have a heating zone. In this way, after the polyester mixture is fed into the extruder, the polyester mixture in the extruder may be mixed and heated accordingly to form a corresponding polyester composition through melt mixing, and then extruded or extruded.

[0079] by Figure 2 For example, along the extrusion direction (eg, from where the polyester mixture is fed in to where the polyester composition is extruded or pushed out), the heating zone may include a first heating zone R1, a second heating zone R2, a third heating zone R3, and a fourth heating zone R4.

[0080] In one embodiment, the heating temperature of the third heating zone R3 may be greater 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 greater than or equal to the heating temperature of the first heating zone R1.

[0081] In one embodiment, the heating temperature of the first heating zone R1 can be between about 230 and 250°C, the heating temperature of the second heating zone R2 can be between about 250 and 270°C, the heating temperature of the third heating zone R3 can be between about 255 and 275°C, and the heating temperature of the fourth heating zone R4 can be between about 245 and 265°C.

[0082] In one embodiment, each heating zone is heated to a corresponding temperature before feeding (commonly known as preheating).

[0083] In this embodiment, Figure 2 As shown, the extruder 100 can be connected to a vacuum system 120. The vacuum system can include a common vacuum pump and a corresponding gas pipeline. The extruder can be vented (vent-up) or the exhaust efficiency can be improved through the vacuum system.

[0084] In one embodiment, along the extrusion direction, the first heating zone R1 may correspond to the first feeder 111 and be located before the second feeder 112; the second heating zone R2 may correspond to the second feeder 112 and be located before the third feeder 113; the third heating zone R3 may correspond to the third feeder 113 and be located before the exhaust point connected to the exhaust system 120; the fourth heating zone R4 may correspond to the exhaust point connected to the exhaust system 120 and be located before the polyester composition is extruded or pushed out.

[0085] Please refer to Figure 1 Step S20 and Figure 2 At least the polyester material, antioxidant and compatibility agent are fed into the extruder 100 via the first feeder 111 for corresponding melt mixing and modification.

[0086] In one embodiment, the crystal nucleating agent may be fed into the extruder 100 via the first feeder 111 for corresponding melt mixing and modification.

[0087] In one embodiment, the flow aid may be fed into the extruder 100 via the first feeder 111 for corresponding melt mixing and modification.

[0088] Please refer to Figure 1 Step S30 and Figure 2 At least the flame retardant is fed into the extruder 100 via the second feeder 112 for corresponding melt mixing and modification.

[0089] In one embodiment, the flame retardant synergist may be fed into the extruder 100 via the second feeder 112 for corresponding melt mixing and modification.

[0090] Please refer to Figure 1 Step S40 and Figure 2 At least the filling and reinforcing material is fed into the extruder 100 via the third feeder 113 for corresponding melt mixing and modification.

[0091] Through the method of the above-mentioned embodiment, after the mixture containing polyester is fed into the extruder 100, the polyester mixture in the extruder 100 can be correspondingly extruded and heated to be melt-mixed and modified by a hot extrusion reaction to form a corresponding polyester composition, which is then extruded or extruded.

[0092] In one embodiment, the extruded or pressed polyester composition may be in the form of polyester pellets by pelletizing.

[0093] In one embodiment, the weight ratio of the polyester material fed into the extruder 100 may be about 35 wt % to 55 wt % based on the total weight of the mixture fed into the extruder 100 .

[0094] In one embodiment, the intrinsic viscosity of the polyester material fed into the extruder 100 may be about 0.55 dL / g to 0.76 dL / g, and the polyester material fed into the extruder 100 may include virgin polyester material, recycled polyester material, or a mixture or combination thereof.

[0095] In one embodiment, based on the total weight of the mixture fed into the extruder 100 , the weight ratio of the crystal nucleating agent may be about 1 wt % to 5 wt %; preferably, about 2 wt % to 3 wt %.

[0096] In one embodiment, the crystal nucleus agent may include a corresponding organic crystal nucleus agent and a corresponding inorganic crystal nucleus agent. In one embodiment, the weight of the organic crystal nucleus agent is about 1 to 2 times the weight of the inorganic crystal nucleus agent (i.e., the weight of the organic crystal nucleus agent: the weight of the inorganic crystal nucleus agent ≒2:1 to 1:1).

[0097] In one embodiment, the total weight ratio of the flame retardant may be about 7.5 wt % to 17.5 wt % based on the total weight of the mixture fed into the extruder 100 .

[0098] In one embodiment, the total weight ratio of the flame retardant and the flame retardant synergist may be about 10 wt % to 20 wt % based on the total weight of the mixture fed into the extruder 100 ; preferably, about 12 wt %.

[0099] 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).

[0100] In one embodiment, the weight of the flame retardant is approximately 3 to 7 times the weight of the flame retardant synergist (i.e., the weight of the flame retardant: the weight of the flame retardant synergist≒3:1~7:1); preferably, the weight of the flame retardant is approximately 5 times the weight of the flame retardant synergist (i.e., the weight of the flame retardant: the weight of the flame retardant synergist≒5:1).

[0101] In one embodiment, the flame retardant may include decabromodiphenylethane, and the corresponding flame retardant synergist may include an antimony-containing flame retardant synergist (such as sodium antimonate, antimony trioxide, or a combination thereof). Moreover, based on the total weight of the mixture fed into the extruder, the total weight ratio of the flame retardant and the flame retardant synergist may be about 12 wt %, and the weight of the flame retardant is about 5 times the weight of the flame retardant synergist.

[0102] In one embodiment, the weight ratio of the antioxidant may be about 0.1 wt % to 1.0 wt % based on the total weight of the mixture fed into the extruder 100 .

[0103] In one embodiment, based on the total weight of the mixture fed into the extruder 100 , the weight ratio of the filling and reinforcing material may be about 25 wt % to 32 wt %.

[0104] In one embodiment, based on the total weight of the mixture fed into the extruder 100 , the weight ratio of the compatibilizer is 5wt% to 15wt% of the amount of the filler and reinforcing material added.

[0105] In one embodiment, the weight ratio of the flow aid may be about 0.05 wt % to 1 wt % based on the total weight of the mixture fed into the extruder 100 .

[0106] [Examples and Comparative Examples]

[0107] The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples at all.

[0108] [Example]

[0109] In the manner of the above embodiment, a polyester composition is formed. In addition, the above embodiment includes the following steps or parameters.

[0110] Same or similar to Figure 1 Step S10 and Figure 2 , an extruder identical or similar to the extruder 100 is provided, wherein the heating temperature of a heating zone identical or similar to the first heating zone R1 is about 230-250° C., the heating temperature of a heating zone identical or similar to the second heating zone R2 is about 250-270° C., the heating temperature of a heating zone identical or similar to the third heating zone R3 is about 255-275° C., and the heating temperature of a heating zone identical or similar to the fourth heating zone R4 is about 245-265° C. And, an exhaust system identical or similar to the exhaust system 120 is activated to exhaust the extruder.

[0111] Same or similar to Figure 1 Step S20 and Figure 2 The polyester material, antioxidant, compatibilizer, crystal nucleating agent, and flow aid are fed into the extruder via a feeder that is the same as or similar to the first feeder 111 for corresponding melt mixing and modification.

[0112] Same or similar to Figure 1 Step S30 and Figure 2 The flame retardant and the flame retardant synergist are fed into the extruder via a feeder that is the same as or similar to the second feeder 112 for corresponding melt mixing and modification.

[0113] Same or similar to Figure 1 Step S40 and Figure 2 The filling reinforcing material is fed into the extruder via a feeder that is the same as or similar to the third feeder 113 for corresponding melt mixing and modification.

[0114] Based on the total weight of the mixture (including polyester material, antioxidant, compatibilizer, crystal nucleating agent, flow aid, flame retardant, flame retardant synergist and filling reinforcement) fed into the extruder, the weight proportion of the antioxidant can be about 0.1wt% to 1.0wt%, the weight proportion of the compatibilizer can be about 5wt% to 15wt%, the weight proportion of the crystal nucleating agent can be about 2wt% to 3wt%, the weight proportion of the flow aid can be about 0.05wt% to 1wt%, the total weight proportion of the flame retardant and the flame retardant synergist is about 12wt%, and the weight proportion of the filling reinforcement can be about 25wt% to 32wt%, and the rest can be polyester material. The polyester material is polyethylene terephthalate, and its intrinsic viscosity can be about 0.55dL / g to 0.76dL / g. The intrinsic viscosity (IV) can be increased by viscosity increasing methods, including solid viscosity increasing or liquid viscosity increasing.

[0115] The polyester composition extruded or pressed out through the steps and parameters of the above [Experimental Example] may have the properties shown in the following [Table 1].

[0116] [Comparative Example 1]

[0117] The corresponding hot extrusion reaction is carried out by using an extruder that is the same or similar to that used in [Example] and by using the same or similar parameters (such as temperature, exhaust conditions) to obtain the corresponding polyester composition.

[0118] Same or similar to Figure 1 Step S20 and Figure 2 , polybutyleneterephthalate (PBT) is fed into the extruder via a feeder that is the same as or similar to the first feeder 111 for corresponding melt mixing and modification.

[0119] Same or similar to Figure 1 Step S40 and Figure 2 The filling reinforcing material is fed into the extruder via a feeder that is the same as or similar to the third feeder 113 for corresponding melt mixing and modification.

[0120] Based on the total weight of the mixture (including polybutylene terephthalate and the filling and reinforcing material) fed into the extruder, the weight proportion of the filling and reinforcing material may be about 30wt%, and the rest may be polybutylene terephthalate.

[0121] The polyester composition extruded or pressed out through the steps and parameters of the above [Comparative Example 1] may have the properties shown in the following [Table 1].

[0122] [Comparative Example 2]

[0123] The corresponding hot extrusion reaction is carried out by using an extruder that is the same or similar to that used in [Example] and by using the same or similar parameters (such as temperature, exhaust conditions) to obtain the corresponding polyester composition.

[0124] Same or similar to Figure 1 Step S20 and Figure 2 The polyester material is fed into the extruder via a feeder that is the same as or similar to the first feeder 111 for corresponding melt mixing and modification.

[0125] The polyester material used in [Comparative Example 2] is substantially the same as or similar to the polyester material used in [Example].

[0126] The polyester composition extruded or pressed out through the steps and parameters of the above [Comparative Example 2] may have the properties shown in the following [Table 1].

[0127] [Comparative Example 3]

[0128] The corresponding hot extrusion reaction is carried out by using an extruder that is the same or similar to that used in [Example] and by using the same or similar parameters (such as temperature, exhaust conditions) to obtain the corresponding polyester composition.

[0129] Same or similar to Figure 1 Step S20 and Figure 2 The polyester material is fed into the extruder via a feeder that is the same as or similar to the first feeder 111 for corresponding melt mixing and modification.

[0130] Same or similar to Figure 1 Step S40 and Figure 2 The filling reinforcing material is fed into the extruder via a feeder that is the same as or similar to the third feeder 113 for corresponding melt mixing and modification.

[0131] The polyester material used in [Comparative Example 3] is substantially the same as or similar to the polyester material used in [Example].

[0132] Based on the total weight of the mixture (including polybutylene terephthalate and the filling and reinforcing material) fed into the extruder, the weight proportion of the filling and reinforcing material may be about 30wt%, and the rest may be polyester material.

[0133] The polyester composition extruded or pressed out through the steps and parameters of the above [Comparative Example 3] may have the properties shown in the following [Table 1].

[0134] [Comparative Example 4]

[0135] Commercially available 30% glass fiber reinforced polyethylene terephthalate (eg, PET engineering plastic with the brand name 4410G6, manufactured by Nan Ya Plastics Industries, Ltd.) is directly used, which may have the properties shown in the following [Table 1].

[0136] [Table 1]

[0137]

[0138]

[0139] In the above-mentioned examples and comparative examples, the evaluation methods or standards may be the same or similar to those described below.

[0140] Specific Gravity: Tested in accordance with ASTM D 792 test standard.

[0141] Izod Impact Strength (HDT): tested according to ASTM D 256 test standard.

[0142] Tensile strength and / or elongation: Tested in accordance with ASTM D 638. Sample size (mm): (165±2)×(19±0.2)×(3.2±0.2), tensile speed 50mm / min.

[0143] Flexural strength and / or flexural modulus: tested in accordance with ASTM D 790. Sample type: Sample size (mm): (127±2)×(12.7±0.2)×(3.2±0.2), bending speed: 13mm / min.

[0144] Flame retardant: According to the UL94 plastic flammability standard issued by the American Underwriters Laboratories. From the lowest (minimum flame retardancy) to the highest (maximum flame retardancy), the order is: HB, V2, V1, V0, 5VB, 5VA.

[0145] Heat deflection temperature (HDT): Tested according to ASTM D 648. The larger the HDT value, the higher the temperature, the corresponding deformation will occur; the smaller the HDT value, the lower the temperature, the corresponding deformation will occur.

[0146] Melt index (MI): Tested according to ASTM D 1238. A larger MI value indicates a higher fluidity; a smaller MI value indicates a lower fluidity.

[0147] The polyester composition of [Comparative Example 2] is poor in the evaluation of impact strength, tensile strength, elongation, flexural strength, flexural modulus, etc., and may be difficult to process accordingly. In addition, the polyester composition of [Comparative Example 2] has low flame retardancy.

[0148] The polyester composition of [Comparative Example 4] has a too low melt index (<30 g), and is difficult to process into a thin injection product with a thickness of less than 1 cm.

[0149] Compared to [Comparative Example 1] to [Comparative Example 4], the polyester composition of the above examples can have better flame retardancy and / or higher heat deformation temperature. In addition, since the polyester composition of the above examples has a higher melt index, it can be suitable for processing into thinner (e.g., less than 1 cm) injection products (e.g., connector joints).

[0150] Compared with [Comparative Example 1] to [Comparative Example 4], the polyester composition of the above examples can meet the applicable specifications or even better in the evaluation of general processability parameters such as impact strength, tensile strength, elongation, flexural strength and / or flexural modulus. For example, the polyester composition of the above examples has higher impact strength, so the polyester composition of the examples or its processed products are less likely to break when impacted by external force.

[0151] [Practicality]

[0152] In addition, the polyester composition (which may be in the form of granules or sheets) formed by the method for manufacturing the polyester composition of the aforementioned embodiment of the present invention can be directly or indirectly applied to existing plastic film materials / injection molding equipment or technology, and can be further processed to become other products for people's livelihood, industry or suitable applications. For example, but not limited to: industrial connectors, fans, relays, etc., which are exposed to high heat and / or high external stress environments.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resin composition, characterized in that: Wherein, based on the total weight of the resin composition, the resin composition comprises: 35 to 55 wt.% polyester; 0.1 wt % to 1.0 wt % of an antioxidant; 7.5 to 17.5 wt % flame retardant; 25 to 32 wt% of a filler reinforcement; and The compatibilizer is equivalent to 5% to 15% by weight of the added amount of the filling and reinforcing material.

2. The resin composition according to claim 1, characterized in that It has a V0 grade or above according to the UL94 plastic flammability standard.

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

4. The resin composition according to claim 1, characterized in that Also includes: 1 wt % to 5 wt % of a crystal nucleating agent.

5. The resin composition according to claim 4, characterized in that The crystal nucleus agent includes an inorganic crystal nucleus agent and an organic crystal nucleus agent.

6. The resin composition according to claim 1, characterized in that Also includes: 0.05 to 1 wt% of a flow aid.

7. The resin composition according to claim 1, characterized in that Also includes: 1.5 to 5 wt% of flame retardant synergist.

8. The method for preparing a resin composition according to claim 7, characterized in that: The weight of the flame retardant is 3 to 7 times the weight of the flame retardant synergist.

9. A method for preparing a resin composition, characterized in that: At least formed by melt-kneading and reforming method, which includes: Provide extruders; and 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 5 wt % to 15 wt % of compatibilizer equivalent to the amount of the filler reinforcement added are fed into the extruder for corresponding melt mixing and modification to form the resin composition.

10. The method for producing a resin composition according to claim 9, characterized in that: in The melt-kneading reforming method includes heating via the extruder.

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