PET alloy material, preparation method thereof and floor base material

Abstract

The invention belongs to the technical field of materials, and particularly relates to a PET alloy material, a preparation method thereof and a floor base material. Compared with the prior art, the low-melting-point polyester polyol and the polyethylene glycol terephthalate resin base material are added into the reaction type chain extender system to react to form the body type polycondensation polymer alloy, so that the PET alloy material has lower processing temperature and wider processing temperature interval; the viscoelasticity change of the melt has a wide gradual change process due to the wider melting process, so that high shearing and high dispersion can be easily realized under the condition of lower processing temperature, especially in a high-filler system, and the performance requirements of an elastic floor base material can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of materials, and in particular relates to a PET alloy material, a preparation method thereof and a floor substrate. Background Art

[0002] Plastic flooring refers to flooring paved with plastic materials. Plastic flooring can be divided into several types according to its basic raw materials, such as polyvinyl chloride (PVC) plastic flooring, polyethylene (PE) plastic flooring and polypropylene (PP) plastic flooring. Among them, PVC plastic flooring is widely used due to its easy processing, high cost performance and mature supply chain, but it is also criticized in the market due to its characteristics of releasing hydrogen chloride fumes when burned and being difficult to degrade naturally. In recent years, with the rapid growth of plastic consumption, the demand for recyclable and naturally degradable plastics has been increasing. Polyethylene terephthalate (PET) is a saturated polyester containing aromatic rings generated by condensation reaction of terephthalic acid and ethylene glycol. Due to its excellent physical properties in a wide temperature range, high impact strength, friction resistance, good rigidity, high hardness, low hygroscopicity, good dimensional stability, etc., its application in the fields of packaging, film, and engineering plastics has been rapidly developed. In addition, with the research and development of functional PET materials, the possibility of using recycled PET to regenerate plastic flooring is increasing.

[0003] The current extruded PET sheets on the market are not suitable for preparing elastic flooring, mainly because of the high cost and low filling content: the filling content in PET sheets is less than 100 phr; while the filling content of PVC floor substrates is more than 300 phr, and the market price of PET resin is higher than that of PVC resin most of the time. In addition, the current extruded PET sheets are all added with glass fiber, which is too rigid and cannot meet the grooving requirements of elastic plastic flooring.

[0004] In addition, the temperature change of PET resin from the beginning of melting to complete melting is particularly narrow, and the melt viscosity drops sharply after complete melting. The low viscoelasticity (Tan δ) is not conducive to the establishment of melt pressure and viscous flow, so that the movement of the screw loses the shearing and dispersion effects. The melt inside the mold has an unstable flow rate due to uneven pressure distribution and cannot be extruded normally. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a PET alloy material with a lower processing temperature and a wider processing temperature range, a preparation method thereof and a floor substrate.

[0006] The present invention provides a PET alloy material, which is composed of the following components based on raw materials:

[0007] 50-80 parts by weight of polyethylene terephthalate resin base material;

[0008] 20-50 parts by weight of low melting point polyester polyol;

[0009] 0.1 to 1 weight part of the first reactive chain extender;

[0010] 1-5 parts by weight of lubricant;

[0011] The melting point of the low-melting-point polyester polyol is less than or equal to 235° C.

[0012] The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight;

[0013] The PET alloy material is used for preparing plastic elastic floor.

[0014] Preferably, it is composed of the following components:

[0015] 70 parts by weight of polyethylene terephthalate resin base material;

[0016] 30 parts by weight of low melting point polyester polyol;

[0017] 0.3 parts by weight of a first reactive chain extender;

[0018] 2 parts by weight of lubricant;

[0019] The melting point of the low-melting-point polyester polyol is less than or equal to 235°C.

[0020] Preferably, the polyethylene terephthalate resin base material is polyethylene terephthalate resin chips and / or polyethylene terephthalate resin recycled material;

[0021] And / or, the melting point of the low melting point polyester polyol is -5°C to 235°C;

[0022] And / or, the molecular weight of the low melting point polyester polyol is 3000-45000.

[0023] Preferably, the low melting point polyester polyol has a structure represented by formula (I) and / or formula (II):

[0024] Formula (I);

[0025] Formula (II);

[0026] Wherein, m, n and p are each independently selected from integers of 1 to 10;

[0027] And / or, the first reactive chain extender is selected from glycidyl acrylate chain extenders and / or glycidyl methacrylate chain extenders;

[0028] And / or, the lubricant is selected from pentaerythritol ester lubricants.

[0029] Preferably, the low melting point polyester polyol is selected from aliphatic polyester polyol and / or aromatic polyester polyol;

[0030] The aliphatic polyester polyol is selected from one or more of polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester, polydecylene glycol ester, polyethylene glycol succinate, polypropylene glycol succinate, polybutylene glycol succinate, polyhexylene glycol succinate, polydecylene glycol succinate, polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester, polydecylene glycol succinate, polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester and polydecylene glycol ester;

[0031] The aromatic polyester polyol is selected from one or more of polybutylene terephthalate, polypropylene terephthalate, polyhexane terephthalate, polydecane terephthalate, polyethylene isophthalate, polypropylene isophthalate, polybutylene isophthalate, polyhexane isophthalate and polydecane isophthalate.

[0032] Preferably, the melting range of the PET alloy material is 200°C to 245°C.

[0033] The present invention also provides a method for preparing the above-mentioned PET alloy material, comprising the following steps:

[0034] The polyethylene terephthalate resin base material, low melting point polyester polyol, a first reaction type chain extender and a lubricant are mixed and melted and reacted to extrude to obtain a PET alloy material.

[0035] The present invention also provides a floor substrate, which comprises, in terms of raw materials:

[0036] 100 parts by weight of the above-mentioned PET alloy material;

[0037] 0-1.5 parts by weight of the second reactive chain extender;

[0038] 5-50 parts by weight of pentaerythritol ester lubricant;

[0039] Filler 100~600 phr.

[0040] The present invention provides a PET alloy material, which is composed of the following components: 50-80 parts by weight of a polyethylene terephthalate resin base material; 20-50 parts by weight of a low-melting polyester polyol; 0.1-1 parts by weight of a first reactive chain extender; 1-5 parts by weight of a lubricant; the melting point of the low-melting polyester polyol is less than or equal to 235°C; and the total amount of the polyethylene terephthalate resin base material and the low-melting polyester polyol is 100 parts by weight; the PET alloy material is used to prepare a plastic elastic floor. Compared with the prior art, the present invention reacts the low-melting polyester polyol and the polyethylene terephthalate resin base material into a bulk polycondensation polymer alloy in the presence of a reactive chain extender system, so that the PET alloy material has a lower processing temperature and a wider processing temperature range, and the wider melting process makes the viscoelasticity of the melt change to have a wide gradual change process, so that high shear and high dispersion can be easily achieved under a lower processing temperature, especially in a high-filler system, so that it can meet the performance requirements of the elastic floor substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a graph showing the viscosity change during extrusion obtained by mixing 100 parts by weight of PET recycled material provided by the present invention with CEP according to the ratio in Table 1 and then extruding the mixture. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] The present invention provides a PET alloy material, which comprises, in terms of raw materials:

[0044] 10-90 parts by weight of polyethylene terephthalate resin base material;

[0045] 10-90 parts by weight of low melting point polyester polyol;

[0046] 0.1-1.5 parts by weight of a first reactive chain extender;

[0047] Lubricant 0-5 parts by weight;

[0048] The melting point of the low-melting-point polyester polyol is less than or equal to 235°C.

[0049] In a specific embodiment provided by the present invention, the content of the polyethylene terephthalate resin base material in the PET alloy material may be 10 parts by weight, 20 parts by weight, 30 parts by weight, 40 parts by weight, 50 parts by weight, 60 parts by weight, 70 parts by weight, 80 parts by weight, 90 parts by weight or a range between any two of the above values.

[0050] In a specific embodiment provided by the present invention, the polyethylene terephthalate resin base material can be any polyethylene terephthalate resin base material well known to those skilled in the art, without any special restrictions. In the present invention, polyethylene terephthalate resin chips and / or polyethylene terephthalate resin recycled materials are preferred; the polyethylene terephthalate resin recycled materials include but are not limited to one or more of bottle flake recycled materials, sheet recycled materials and fiber recycled materials; the polyethylene terephthalate resin recycled materials are preferably polyethylene terephthalate resin bottle flake recycled materials.

[0051] In a specific embodiment provided by the present invention, the content of the low melting point polyester polyol in the PET alloy material may be 10 parts by weight, 20 parts by weight, 30 parts by weight, 40 parts by weight, 50 parts by weight, 60 parts by weight, 70 parts by weight, 80 parts by weight, 90 parts by weight or a range between any two of the above values.

[0052] In a specific embodiment provided by the present invention, the total amount of the low melting point polyester polyol and the polyethylene terephthalate resin base material is 100 parts by weight.

[0053] In a specific embodiment provided by the present invention, the low melting point polyester polyol has a structure shown by formula (I) and / or formula (II):

[0054] Formula (I);

[0055] Formula (II);

[0056] wherein m, n and p are each independently an integer of 1 to 10; optionally, m, n and p are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; 2m , CH 2n With CH 2p It can be a straight chain or a branched chain, and there is no particular limitation.

[0057] In a specific embodiment provided by the present invention, the low melting point polyester polyol has a structure shown by formula (I-1) to (I-3) or formula (II):

[0058] Formula (I-1);

[0059] Formula (I-2);

[0060] Formula (I-3);

[0061] Formula (II);

[0062] wherein m, n and p are each independently an integer of 1 to 10; optionally, m, n and p are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; 2m , CH 2n With CH 2p It can be a straight chain or a branched chain, and there is no particular limitation.

[0063] In a specific embodiment provided by the present invention, the low melting point polyester polyol is preferably an aliphatic polyester polyol and / or an aromatic polyester polyol; the aliphatic polyester polyol is preferably polyethylene glycol oxalate, polyethylene glycol propylene glycol oxalate, polyethylene glycol butylene glycol oxalate, polyethylene glycol oxalate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, polyethylene glycol succinate, The aromatic polyester polyol is preferably one or more of polybutylene terephthalate, polypropylene terephthalate, polyhexylene terephthalate, polydecyl terephthalate, polyethylene isophthalate, polypropylene isophthalate, polybutylene isophthalate, polyhexylene isophthalate and polydecyl isophthalate. In a specific embodiment provided by the present invention, the low melting point polyester polyol is preferably one or more of polyethylene oxalate, polyethylene adipate, polyethylene terephthalate and polyethylene isophthalate; the polyethylene oxalate is preferably one or more of polyethylene oxalate, polyethylene propylene glycol, polyethylene butylene glycol, polyethylene hexanediol and polyethylene decanediol; the polyethylene adipate is preferably polyethylene adipate, polyethylene propylene glycol, polyethylene terephthalate and polyethylene isophthalate. , polybutylene adipate, polyhexylene adipate and polydecylene adipate; the polyalkylene terephthalate is preferably one or more of polybutylene terephthalate, polypropylene terephthalate, polyhexylene terephthalate and polydecylene terephthalate; the polyalkylene isophthalate is preferably one or more of polyethylene isophthalate, polypropylene isophthalate, polybutylene isophthalate, polyhexylene isophthalate and polydecylene isophthalate.

[0064] In a specific embodiment provided by the present invention, the melting point of the low melting point polyester polyol is preferably -5°C to 235°C; optionally, the melting point of the low melting point polyester polyol is -5°C, 0°C, 5°C, 10°C, 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, 115°C, 120°C, 125°C, 130°C, 135°C, 140°C, 145°C, 150°C, 155°C, 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C, 195°C, 200°C, 205°C, 210°C, 215°C, 220°C, 225°C, 230°C, 235°C or the range between any two of the above values.

[0065] In a specific embodiment provided by the present invention, the number average molecular weight of the low melting point polyester polyol is preferably 3000-45000; optionally, the number average molecular weight of the low melting point polyester polyol is 3000, 5000, 8000, 10000, 12000, 15000, 18000, 20000, 22000, 25000, 28000, 30000, 32000, 35000, 138000, 40000, 42000, 45000 or a range between any two of the above values.

[0066] In a specific embodiment provided by the present invention, the low melting point polyester polyol is specifically polybutylene terephthalate with a number average molecular weight of 45,000, polyethylene isophthalate with a number average molecular weight of 45,000, polybutylene isophthalate with a number average molecular weight of 45,000, polytrimethylene terephthalate with a number average molecular weight of 45,000, or polytrimethylene isophthalate with a number average molecular weight of 45,000.

[0067] In a specific embodiment provided by the present invention, the low melting point polyester polyol is specifically polybutylene oxalate with a number average molecular weight of 35,000, polyethylene adipate with a number average molecular weight of 35,000, polybutylene adipate with a number average molecular weight of 35,000, or polypropylene adipate with a number average molecular weight of 35,000.

[0068] In a specific embodiment provided by the present invention, the content of the first reactive chain extender in the PET alloy material can be 0.1 parts by weight, 0.3 parts by weight, 0.5 parts by weight, 0.8 parts by weight, 1.0 parts by weight, 1.5 parts by weight or a range between any two of the above values.

[0069] In a specific embodiment provided by the present invention, the first reactive chain extender is preferably one or more of pyromellitic dianhydride chain extenders, glycidyl acrylate chain extenders and glycidyl methacrylate chain extenders.

[0070] In a specific embodiment provided by the present invention, the pyromellitic dianhydride chain extender is preferably pyromellitic dianhydride.

[0071] In a specific embodiment provided by the present invention, the glycidyl methacrylate chain extender is preferably polystyrene-methyl methacrylate-glycidyl methacrylate; the weight average molecular weight (Mw) of the polystyrene-methyl methacrylate-glycidyl methacrylate is preferably 5000-10000, more preferably 6000-8000, and even more preferably 7000; in some embodiments provided by the present invention, ADR4468 BASF is specifically used as an example for illustration.

[0072] In a specific embodiment provided by the present invention, the content of the lubricant in the PET alloy material can be 0 parts by weight, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight or a range between any two of the above values.

[0073] In a specific embodiment provided by the present invention, the lubricant is preferably a pentaerythritol ester lubricant, and more preferably pentaerythritol stearate (PETS).

[0074] In a specific embodiment provided by the present invention, the PET alloy material is composed of the following components based on raw materials:

[0075] 40-80 parts by weight of polyethylene terephthalate resin base material;

[0076] 20-60 parts by weight of low melting point polyester polyol;

[0077] 0.1-1.5 parts by weight of a first reactive chain extender;

[0078] 1-5 parts by weight of lubricant;

[0079] The melting point of the low-melting-point polyester polyol is less than or equal to 235° C.

[0080] The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight;

[0081] The PET alloy material is used for preparing plastic elastic floor.

[0082] In a specific embodiment provided by the present invention, the PET alloy material is composed of the following components based on raw materials:

[0083] 50-80 parts by weight of polyethylene terephthalate resin base material;

[0084] 20-50 parts by weight of low melting point polyester polyol;

[0085] 0.1 to 1 weight part of the first reactive chain extender;

[0086] 1-5 parts by weight of lubricant;

[0087] The melting point of the low-melting-point polyester polyol is less than or equal to 235° C.

[0088] The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight;

[0089] The PET alloy material is used for preparing plastic elastic floor.

[0090] In a specific embodiment provided by the present invention, the PET alloy material is composed of the following components based on raw materials:

[0091] 60-80 parts by weight of polyethylene terephthalate resin base material;

[0092] 20-40 parts by weight of low melting point polyester polyol;

[0093] 0.1-0.5 parts by weight of a first reactive chain extender;

[0094] 1-3 parts by weight of lubricant;

[0095] The melting point of the low-melting-point polyester polyol is less than or equal to 235° C.

[0096] The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight;

[0097] The PET alloy material is used for preparing plastic elastic floor.

[0098] In a specific embodiment provided by the present invention, the PET alloy material is composed of the following components based on raw materials:

[0099] 70 parts by weight of polyethylene terephthalate resin base material;

[0100] 30 parts by weight of low melting point polyester polyol;

[0101] 0.3 parts by weight of a first reactive chain extender;

[0102] 2 parts by weight of lubricant;

[0103] The melting point of the low-melting-point polyester polyol is less than or equal to 235° C.

[0104] The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight;

[0105] The PET alloy material is used for preparing plastic elastic floor.

[0106] In a specific embodiment provided by the present invention, the melting range of the PET alloy material is preferably 200°C to 245°C.

[0107] The present invention reacts low-melting-point polyester polyol and polyethylene terephthalate resin base material in a reactive chain extender system to form a bulk polycondensation polymer alloy, so that the PET alloy material has a lower processing temperature and a wider processing temperature range. The wider melting process allows the viscoelasticity of the melt to have a wide gradual change process, so that high shear and high dispersion can be easily achieved at a lower processing temperature, especially in a high-filler system, so that the performance requirements of the elastic floor substrate can be met.

[0108] The viscoelasticity (VE) of the PET alloy material provided by the present invention has a wide gradual change process (solid state-high viscoelasticity-medium viscoelasticity-low viscoelasticity-silt-like).

[0109] The present invention also provides a method for preparing a PET alloy material, comprising the following steps: mixing a polyethylene terephthalate resin base material, a low melting point polyester polyol, a first reactive chain extender and a lubricant, and performing melt reaction extrusion to obtain the PET alloy material.

[0110] The present invention has no special restrictions on the sources of all raw materials, and any raw materials available on the market can be used; the amounts and types of the polyethylene terephthalate resin base material, low melting point polyester polyol, first reaction type chain extender and lubricant are the same as described above and will not be repeated here.

[0111] In a specific embodiment provided by the present invention, the mixing temperature is preferably 60° C. to 120° C.; and the mixing time is preferably 5 to 25 min.

[0112] In a specific embodiment provided by the present invention, the melt reaction extrusion is preferably carried out in a twin-screw extruder.

[0113] In a specific embodiment provided by the present invention, after the melt reaction extrusion, preferably drying and granulation are performed to obtain the PET alloy material; the drying is preferably performed by centrifugal dehydration and infrared drying; the temperature of the infrared drying is preferably 100°C to 120°C.

[0114] The present invention also provides a floor substrate, comprising the above-mentioned PET alloy material.

[0115] In a specific embodiment provided by the present invention, the floor substrate comprises, in terms of raw materials:

[0116] 100 parts by weight of the above-mentioned PET alloy material;

[0117] 0-1.5 parts by weight of the second reactive chain extender;

[0118] 5-50 parts by weight of pentaerythritol ester lubricant;

[0119] Filler 100~600 phr.

[0120] Wherein phr is the weight of the substance added to 100 units of resin.

[0121] In the present invention, the PET alloy material can be an alloy material extruded and granulated from the above-mentioned formula raw materials, or can be the above-mentioned formula raw materials.

[0122] In a specific embodiment provided by the present invention, the floor substrate is an elastic floor substrate.

[0123] In a specific embodiment provided by the present invention, the above raw materials are extrusion raw material formulas for floor substrates.

[0124] In a specific embodiment provided by the present invention, optionally, the content of the second reactive chain extender in the formula of the floor substrate is 0 weight part, 0.1 weight part, 0.3 weight part, 0.5 weight part, 0.8 weight part, 1.0 weight part, 1.5 weight part or a range between any two of the above values.

[0125] In a specific embodiment provided by the present invention, the second reactive chain extender is preferably one or more of pyromellitic dianhydride chain extenders, glycidyl acrylate chain extenders and glycidyl methacrylate chain extenders.

[0126] In a specific embodiment provided by the present invention, the pyromellitic dianhydride chain extender is preferably pyromellitic dianhydride.

[0127] In a specific embodiment provided by the present invention, the glycidyl methacrylate chain extender is preferably polystyrene-methyl methacrylate-glycidyl methacrylate; the weight average molecular weight (Mw) of the polystyrene-methyl methacrylate-glycidyl methacrylate is preferably 5000-10000, more preferably 6000-8000, and even more preferably 7000; in some embodiments provided by the present invention, ADR4468 BASF is specifically used as an example for illustration.

[0128] In a specific embodiment provided by the present invention, optionally, the content of the pentaerythritol ester lubricant in the formula of the floor substrate is 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight or a range between any two of the above values.

[0129] In a specific embodiment provided by the present invention, the pentaerythritol ester lubricant is preferably pentaerythritol stearate (PETS).

[0130] In a specific embodiment provided by the present invention, optionally, the content of the filler in the formulation of the floor substrate is 100 phr, 200 phr, 300 phr, 400 phr, 500 phr or a range between any two of the above values.

[0131] In a specific embodiment provided by the present invention, the mesh number of the filler is preferably 100-1250 mesh; optionally, the mesh number of the filler is preferably 100 mesh, 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh, 1100 mesh, 1200 mesh, 1250 mesh or a range between any two of the above values.

[0132] In a specific embodiment provided by the present invention, the filler is preferably one or more of calcium carbonate, talc and fly ash.

[0133] In a specific embodiment provided by the present invention, the filler is preferably 300 mesh heavy uncoated calcium carbonate.

[0134] In a specific embodiment provided by the present invention, the floor substrate comprises, in terms of raw materials:

[0135] 100 parts by weight of the above-mentioned PET alloy material;

[0136] 0-1.5 parts by weight of the second reactive chain extender;

[0137] 5-30 parts by weight of pentaerythritol ester lubricant;

[0138] Filler 100~600 phr.

[0139] In a specific embodiment provided by the present invention, the floor substrate comprises, in terms of raw materials:

[0140] 100 parts by weight of the above-mentioned PET alloy material;

[0141] 0-1.5 parts by weight of the second reactive chain extender;

[0142] 10 parts by weight of pentaerythritol ester lubricant;

[0143] Filler 100~600 phr.

[0144] In a specific embodiment provided by the present invention, the floor substrate comprises, in terms of raw materials:

[0145] 100 parts by weight of the above-mentioned PET alloy material;

[0146] 0-1.5 parts by weight of the second reactive chain extender;

[0147] 10 parts by weight of pentaerythritol ester lubricant;

[0148] Filler 100~400 phr.

[0149] The present invention also provides a method for preparing the above-mentioned floor substrate, comprising the following steps: heating and mixing the PET alloy material, the second reactive chain extender, the pentaerythritol ester lubricant and the filler, extruding and molding to obtain the floor substrate.

[0150] The types and amounts of the PET alloy material, the second reactive chain extender, the pentaerythritol ester lubricant and the filler are the same as those described above and will not be described in detail here.

[0151] In a specific embodiment provided by the present invention, the temperature of the heating and mixing is preferably 100°C to 150°C, more preferably 110°C to 130°C, and even more preferably 110°C to 120°C.

[0152] In a specific embodiment provided by the present invention, the extrusion is preferably carried out by a twin-screw extruder.

[0153] In a specific embodiment provided by the present invention, the molding is preferably performed by a mold, more preferably by a T-shaped mold.

[0154] In a specific embodiment provided by the present invention, after forming, preferably after forming treatment by a multi-roller forming system, cutting is performed to obtain a floor substrate.

[0155] The present invention also provides another method for preparing the above-mentioned floor substrate, comprising the following steps: heating and mixing a polyethylene terephthalate resin base material, a low melting point polyester polyol, a first reactive chain extender, a lubricant, a second reactive chain extender, a pentaerythritol ester lubricant and a filler, extruding, and molding to obtain a floor substrate.

[0156] The polyethylene terephthalate resin base material, low melting point polyester polyol, first reactive chain extender, lubricant, second reactive chain extender, pentaerythritol ester lubricant and filler are the same as described above and will not be described again.

[0157] The present invention also provides an application of the PET alloy material in preparing a plastic elastic floor, wherein the raw material of the PET alloy material comprises recycled polyethylene terephthalate resin.

[0158] In a specific embodiment provided by the present invention, the polyethylene terephthalate resin recycled materials include but are not limited to PET bottle flake recycled materials, PET fiber recycled materials, PET sheet recycled materials and other PET product recycled materials.

[0159] In order to further illustrate the present invention, a PET alloy material, a preparation method thereof and a floor substrate provided by the present invention are described in detail below in conjunction with embodiments.

[0160] The reagents used in the following examples are all commercially available; the PET recycled materials used in the examples and comparative examples are recycled bottle flakes.

[0161] 100 parts by weight of PET recycled material and CEP were mixed and extruded according to the ratio in Table 1. The viscosity change results during the extrusion process are shown in Table 1 and Table 2. Figure 1 In Table 1, CEP is a reactive chain extender; ADR is polystyrene-methyl methacrylate-glycidyl methacrylate, Mw molecular weight 7000, ADR4468 BASF; PMDA is pyromellitic dianhydride.

[0162] Table 1 Effect of CEP on PET regrind viscosity

[0163]

[0164] It can be seen from Table 1 that when the addition amount of the reactive chain extender is 0.3%~0.8% of the resin content, the viscosity can be significantly increased, which is beneficial to extrusion.

[0165] Examples and Comparative Examples

[0166] According to the formula in Table 2, the materials were stirred and mixed at 80°C, and extruded through a co-rotating twin-screw reaction extruder. After centrifugal dehydration and infrared drying at 120°C, a PET alloy material was obtained.

[0167] The CEP used in Table 2 is polystyrene-methyl methacrylate-glycidyl methacrylate with a mass ratio of 1:1, Mw molecular weight 7000, ADR4468 BASF and PMDA (pyromellitic dianhydride).

[0168] Table 3 shows the index requirements for floor substrates.

[0169] According to the formula in Table 4, PET alloy material, PETS and filler are mixed and heated to 125 degrees by friction, extruded and molded to obtain a floor substrate; the PET alloy material in Table 4 is obtained according to formula F3.

[0170] The type of filler in Table 4 is preferably 300 mesh heavy uncoated calcium carbonate.

[0171] The PET alloy materials obtained from formulas A1~A10, B1~B10, C1~C10, D1~D10, E1~E10, F1~F10, G1~G10, H1~H10 and I1~I10 were used to prepare floor substrates according to formula 4# in Table 4.

[0172] The performance of the PET alloy material and the floor substrate was tested. The test size of the floor substrate was 150 mm × 50 mm × 5 mm. The test results are shown in Table 5.

[0173] Table 2 Formula of PET alloy material (parts by weight)

[0174]

[0175]

[0176]

[0177] Table 3 Index of floor substrate

[0178]

[0179] Table 4 Floor substrate

[0180]

[0181] It can be seen from Table 4 that 3# and 4# can be used as the optimal formula for preparing floor substrates.

[0182] Table 5 Test results of PET alloy materials and floor substrate performance

[0183]

[0184]

[0185]

[0186]

[0187]

[0188] Note: "Unmeasurable" in Table 5 means that the substrate is not melted at 220°C and is still solid, but it can still melt at higher temperatures and can be used to prepare extrusion substrates with a certain thickness.

[0189] According to the requirements for preparing floor substrates, it has a suitable extrusion melt viscosity and also has high mechanical properties. From the data in Table 5, it can be seen that C4 and F3 can be used as the optimal formula for preparing PET alloy materials.

[0190] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A PET alloy material, characterized in that: The raw materials are composed of the following components: 50-80 parts by weight of polyethylene terephthalate resin base material; 20-50 parts by weight of low melting point polyester polyol; 0.1 to 1 weight part of the first reactive chain extender; 1-5 parts by weight of lubricant; The melting point of the low-melting-point polyester polyol is less than or equal to 235° C. The total amount of the polyethylene terephthalate resin base material and the low melting point polyester polyol is 100 parts by weight; The PET alloy material is used for preparing plastic elastic floor.

2. The PET alloy material according to claim 1, characterized in that: The raw materials are composed of the following components: 70 parts by weight of polyethylene terephthalate resin base material; 30 parts by weight of low melting point polyester polyol; 0.3 parts by weight of a first reactive chain extender; 2 parts by weight of lubricant; The melting point of the low-melting-point polyester polyol is less than or equal to 235°C.

3. The PET alloy material according to claim 1 or 2, characterized in that: The polyethylene terephthalate resin base material is polyethylene terephthalate resin chips and / or polyethylene terephthalate resin recycled material; And / or, the melting point of the low melting point polyester polyol is -5°C to 235°C; And / or, the molecular weight of the low melting point polyester polyol is 3000-45000.

4. The PET alloy material according to any one of claims 1 to 3, characterized in that: The low melting point polyester polyol has a structure shown in formula (I) and / or formula (II): Formula (I); Formula (II); Wherein, m, n and p are each independently selected from integers of 1 to 10; And / or, the first reactive chain extender is selected from glycidyl acrylate chain extenders and / or glycidyl methacrylate chain extenders; and / or, the lubricant is selected from pentaerythritol ester lubricants; And / or, the melting range of the PET alloy material is 200°C to 245°C.

5. The PET alloy material according to any one of claims 1 to 4, characterized in that: The low melting point polyester polyol is selected from aliphatic polyester polyols and / or aromatic polyester polyols; The aliphatic polyester polyol is selected from one or more of polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester, polydecylene glycol ester, polyethylene glycol succinate, polypropylene glycol succinate, polybutylene glycol succinate, polyhexylene glycol succinate, polydecylene glycol succinate, polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester, polydecylene glycol succinate, polyethylene glycol ester, polypropylene glycol ester, polybutylene glycol ester, polyhexylene glycol ester and polydecylene glycol ester; The aromatic polyester polyol is selected from one or more of polybutylene terephthalate, polypropylene terephthalate, polyhexane terephthalate, polydecane terephthalate, polyethylene isophthalate, polypropylene isophthalate, polybutylene isophthalate, polyhexane isophthalate and polydecane isophthalate.

6. A method for preparing the PET alloy material according to any one of claims 1 to 5, characterized in that: The following steps are involved: The polyethylene terephthalate resin base material, low melting point polyester polyol, a first reaction type chain extender and a lubricant are mixed and melted, reacted and extruded to obtain a PET alloy material.

7. A floor substrate, characterized in that: In terms of raw materials, it includes: 100 parts by weight of the PET alloy material according to any one of claims 1 to 5; 0-1.5 parts by weight of the second reactive chain extender; 5-50 parts by weight of pentaerythritol ester lubricant; Filler 100~600 phr.

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