CN104419148A - Core-shell particle toughened antistatic PBT/PET (polybutylece terephthalate/polyethylene terephthalate) alloy - Google Patents

Abstract

The invention discloses a core-shell particle toughened antistatic PBT/PET (polybutylece terephthalate/polyethylene terephthalate) alloy which is prepared from the following components in percentage by weight: 20-50% of PBT, 20-50% of PET, 2-8% of antistatic masterbatch, 5-15% of calcium carbonate particles, 5-10% of a POE (polyolefin elastomer) elastomer, 0.5-2% of maleic anhydride, 0.1-0.5% of dibenzoyl peroxide, 0.1-1% of a nucleating agent, 0.1-1% of an antioxidant and 0.1-1% of a lubricant. The alloy disclosed by the invention has the beneficial effects that compared with the prior art, the alloy is blended and modified by using the antistatic masterbatch and the core-shell particles, so that the strength, rigidity, heat resistance and corrosion resistance of the prepared PBT/PET alloy are greatly improved and good mechanical, chemical and electric performances are maintained based on the advantages of PBT and PET, and moreover, the alloy has excellent antistatic property and processability, and the surface resistance of a product can reach 10<8-10> ohm.

Description

A kind of antistatic PBT/PET alloy of Toughened With Core-Shell Particles

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of antistatic PBT/PET alloy of Toughened With Core-Shell Particles.

Background technology

PBT/PET alloy (polybutylene terephthalate/polyethylene terephthalate) is the ideal engineering plastics of a kind of over-all properties, it has the features such as the good and good elasticity of high temperature resistant, moisture-proof, resistance to chemical attack, electrical insulation capability, and can good mechanical property be kept in wide temperature range, having a wide range of applications in national economy and new high-tech industry, is a kind of indispensable type material.But PBT/PET Alloyapplication is when electrical equipment relevant industries, and difficulty is kept away and produced electrostatic in process of production, form static voltage, can cause electrostatic breakdown goods, more serious meeting brings personal injury; Also there is the shortcoming that notched Izod impact strength is low, heat-drawn wire is low, shrinking percentage is large in PBT/PET alloy simultaneously.Above-mentioned shortcoming significantly limit the application of PBT/PET alloy.

Summary of the invention

In view of the deficiency that prior art exists, the antistatic PBT/PET alloy providing a kind of Toughened With Core-Shell Particles of the present invention, has that toughening effect is good, antistatic property is high and keeps the features such as good mechanical, chemistry and electric property.

The technical solution adopted for the present invention to solve the technical problems is: a kind of antistatic PBT/PET alloy of Toughened With Core-Shell Particles, and its component by mass percent proportioning is: PBT 20% ~ 50%, PET 20% ~ 50%, antistatic master granule 2% ~ 8%, calcium carbonate particles 5% ~ 15%, POE elastomerics 5% ~ 10%, maleic anhydride 0.5% ~ 2%, dibenzoyl peroxide 0.1% ~ 0.5%, nucleator 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 1%, lubricant 0.1% ~ 1%.

Described PBT is polybutylene terephthalate.

Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.1dL/g.

The antistatic master granule that described antistatic master granule is made up of pet resin 70wt%, stearic acid monoglycerides (GMS) 25wt% and calcium stearate 5wt%.

Described nucleator is the mixture of one or more in talcum powder, aluminium sesquioxide, sodium stearate, Sodium Benzoate, ethylene-methyl methacrylate sodium ion polymkeric substance.

Described oxidation inhibitor is the one in antioxidant 1010, antioxidant 1076, antioxidant 1076 and irgasfos 168 compound.

Described lubricant is ethylene bis stearic amide (EBS).

The preparation method of the antistatic PBT/PET alloy of above-mentioned a kind of Toughened With Core-Shell Particles, comprises the following steps:

(1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, PET at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, calcium carbonate particles at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by;

(2), antistatic master granule is prepared: take pet resin, stearic acid monoglycerides (GMS) and calcium stearate by weight ratio, then add in high-speed mixer or ultrasonic generator and mix 3 ~ 15 minutes, again the material mixed is added twin screw extruder melt blending, cooling, pelletizing, dry rear obtained antistatic master granule, stand-by;

(3), taking dry calcium carbonate particles by weight ratio, to add barrel temperature be in 30 DEG C ~ 80 DEG C high-speed mixers, stir 1 ~ 5 minute, then add the maleic anhydride and dibenzoyl peroxide that take by weight ratio, stir 5 ~ 15 minutes, obtain pretreated calcium carbonate particles, discharging; Again on 50 DEG C ~ 80 DEG C opening rubber mixing machines by pretreated calcium carbonate particles and the direct mixed milling of POE elastomerics that claims by weight ratio even, slice, cooling is broken, the core-shell particles that to obtain take calcium carbonate particles as core, POE elastomerics is shell, stand-by;

(4), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the core-shell particles that step (3) obtains again, add the nucleator, oxidation inhibitor and the lubricant that take by weight ratio simultaneously, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(5), add in twin screw extruder by the compound of step (4), at 230 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.

The invention has the beneficial effects as follows, compared with prior art, the present invention adopts antistatic master granule and core-shell particles blending and modifying, make the PBT/PET alloy that obtains on the basis with PBT and PET advantage separately, substantially increase its intensity, rigidity, thermotolerance, erosion resistance maintenance good mechanical, chemistry and electric property, and there is excellent antistatic property and processing characteristics, its product surface resistance can reach 10 ^{8 ~ 10}Ω.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1:

An antistatic PBT/PET alloy for Toughened With Core-Shell Particles, its component by mass percent proportioning is: PBT 20% ~ 50%, PET 20% ~ 50%, antistatic master granule 5%, calcium carbonate particles 15%, POE elastomerics 10%, maleic anhydride 1.5%, dibenzoyl peroxide 0.3%, sodium stearate 0.7%, antioxidant 1010 0.5%, ethylene bis stearic amide (EBS) 1%.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.1dL/g; The antistatic master granule that described antistatic master granule is made up of pet resin 70wt%, stearic acid monoglycerides (GMS) 25wt% and calcium stearate 5wt%.

Preparation method: (1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, PET at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, calcium carbonate particles at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by; (2), antistatic master granule is prepared: take pet resin, stearic acid monoglycerides (GMS) and calcium stearate by weight ratio, then add in high-speed mixer or ultrasonic generator and mix 3 ~ 15 minutes, again the material mixed is added twin screw extruder melt blending, cooling, pelletizing, dry rear obtained antistatic master granule, stand-by; (3), taking dry calcium carbonate particles by weight ratio, to add barrel temperature be in 30 DEG C ~ 80 DEG C high-speed mixers, stir 1 ~ 5 minute, then add the maleic anhydride and dibenzoyl peroxide that take by weight ratio, stir 5 ~ 15 minutes, obtain pretreated calcium carbonate particles, discharging; Again on 50 DEG C ~ 80 DEG C opening rubber mixing machines by pretreated calcium carbonate particles and the direct mixed milling of POE elastomerics that claims by weight ratio even, slice, cooling is broken, the core-shell particles that to obtain take calcium carbonate particles as core, POE elastomerics is shell, stand-by; (4), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the core-shell particles that step (3) obtains again, add the sodium stearate, antioxidant 1010 and the ethylene bis stearic amide (EBS) that take by weight ratio simultaneously, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (5), add in twin screw extruder by the compound of step (4), at 230 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.

Embodiment 2:

An antistatic PBT/PET alloy for Toughened With Core-Shell Particles, its component by mass percent proportioning is: the mixture 0.8% of PBT 37%, PET 37%, antistatic master granule 8%, calcium carbonate particles 10%, POE elastomerics 5%, maleic anhydride 0.5%, dibenzoyl peroxide 0.2%, sodium stearate and ethylene-methyl methacrylate sodium ion polymkeric substance, antioxidant 1076 and irgasfos 168 compound 0.5%, ethylene bis stearic amide (EBS) 1%.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.9 ~ 1.1dL/g; The antistatic master granule that described antistatic master granule is made up of pet resin 70wt%, stearic acid monoglycerides (GMS) 25wt% and calcium stearate 5wt%.

Preparation method: (1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, PET at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, calcium carbonate particles at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by; (2), antistatic master granule is prepared: take pet resin, stearic acid monoglycerides (GMS) and calcium stearate by weight ratio, then add in high-speed mixer or ultrasonic generator and mix 3 ~ 15 minutes, again the material mixed is added twin screw extruder melt blending, cooling, pelletizing, dry rear obtained antistatic master granule, stand-by; (3), taking dry calcium carbonate particles by weight ratio, to add barrel temperature be in 30 DEG C ~ 80 DEG C high-speed mixers, stir 1 ~ 5 minute, then add the maleic anhydride and dibenzoyl peroxide that take by weight ratio, stir 5 ~ 15 minutes, obtain pretreated calcium carbonate particles, discharging; Again on 50 DEG C ~ 80 DEG C opening rubber mixing machines by pretreated calcium carbonate particles and the direct mixed milling of POE elastomerics that claims by weight ratio even, slice, cooling is broken, the core-shell particles that to obtain take calcium carbonate particles as core, POE elastomerics is shell, stand-by; (4), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the core-shell particles that step (3) obtains again, add the mixture of sodium stearate and the ethylene-methyl methacrylate sodium ion polymkeric substance taken by weight ratio, antioxidant 1076 and irgasfos 168 compound and ethylene bis stearic amide (EBS) simultaneously, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (5), add in twin screw extruder by the compound of step (4), at 230 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.

Claims (6)

1. the antistatic PBT/PET alloy of a Toughened With Core-Shell Particles, it is characterized in that, its component by mass percent proportioning is: PBT 20% ~ 50%, PET 20% ~ 50%, antistatic master granule 2% ~ 8%, calcium carbonate particles 5% ~ 15%, POE elastomerics 5% ~ 10%, maleic anhydride 0.5% ~ 2%, dibenzoyl peroxide 0.1% ~ 0.5%, nucleator 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 1%, lubricant 0.1% ~ 1%.

2. the antistatic PBT/PET alloy of a kind of Toughened With Core-Shell Particles according to claim 1, it is characterized in that, the antistatic master granule that described antistatic master granule is made up of pet resin 70wt%, stearic acid monoglycerides (GMS) 25wt% and calcium stearate 5wt%.

3. the antistatic PBT/PET alloy of a kind of Toughened With Core-Shell Particles according to claim 1, it is characterized in that, described nucleator is the mixture of one or more in talcum powder, aluminium sesquioxide, sodium stearate, Sodium Benzoate, ethylene-methyl methacrylate sodium ion polymkeric substance.

4. the antistatic PBT/PET alloy of a kind of Toughened With Core-Shell Particles according to claim 1, is characterized in that, described oxidation inhibitor is the one in antioxidant 1010, antioxidant 1076, antioxidant 1076 and irgasfos 168 compound.

5. the antistatic PBT/PET alloy of a kind of Toughened With Core-Shell Particles according to claim 1, is characterized in that, described lubricant is ethylene bis stearic amide (EBS).

6. the preparation method of the antistatic PBT/PET alloy of a kind of Toughened With Core-Shell Particles according to claim 1, is characterized in that, comprise the following steps:

(1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, PET at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, calcium carbonate particles at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by;

(2), antistatic master granule is prepared: take pet resin, stearic acid monoglycerides (GMS) and calcium stearate by weight ratio, then add in high-speed mixer or ultrasonic generator and mix 3 ~ 15 minutes, again the material mixed is added twin screw extruder melt blending, cooling, pelletizing, dry rear obtained antistatic master granule, stand-by;

(3), taking dry calcium carbonate particles by weight ratio, to add barrel temperature be in 30 DEG C ~ 80 DEG C high-speed mixers, stir 1 ~ 5 minute, then add the maleic anhydride and dibenzoyl peroxide that take by weight ratio, stir 5 ~ 15 minutes, obtain pretreated calcium carbonate particles, discharging; Again on 50 DEG C ~ 80 DEG C opening rubber mixing machines by pretreated calcium carbonate particles and the direct mixed milling of POE elastomerics that claims by weight ratio even, slice, cooling is broken, the core-shell particles that to obtain take calcium carbonate particles as core, POE elastomerics is shell, stand-by;

(4), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the core-shell particles that step (3) obtains again, add the nucleator, oxidation inhibitor and the lubricant that take by weight ratio simultaneously, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(5), add in twin screw extruder by the compound of step (4), at 230 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains this product.