CN104672810A - Environment-friendly flame-retardant polybutylece terephthalate/polyethylene terephthalate (PBT/PET) alloy and preparation method thereof - Google Patents

Abstract

The invention discloses an environment-friendly flame-retardant polybutylece terephthalate/polyethylene terephthalate (PBT/PET) alloy and a preparation method thereof. The environment-friendly flame-retardant PBT/PET alloy is prepared from the following components in parts by weight: 30-60% of PBT, 30-60% of PET, 15-25% of a compound halogen-free flame retardant, 0.5-2% of a nucleating agent, 0.1-1% of a nucleation accelerator, 0.5-2% of a lubricating agent, 0.1-1% of an antioxidant and 0.1-1% of a light stabilizer. The environment-friendly flame-retardant polybutylece terephthalate/polyethylene terephthalate (PBT/PET) alloy has the beneficial effects that compared with the prior art, the prepared PBT/PET alloy greatly synthesizes the PBT and the PET, and has excellent comprehensive performances, great impact performance, high heat resistance, good machining performance and stable size; and furthermore, the flame resistance effect is good, the PBT-PET alloy is halogen-free, safe, low in smoke without toxicity and efficiency, is up to the UL94V-0 flame-retardant level, and can be suitable for industries of household appliances, electronics, automobiles and textile.

Description

Environment-friendly flame retardant PBT/PET alloy and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of environment-friendly flame retardant PBT/PET alloy and preparation method thereof.

Background technology

Polybutylene terephthalate (PBT) is that 20 century 70s obtain a kind of model engineering plastic developed rapidly, its general mechanical property is all better than polyethylene terephthalate (PET), and there is good toughness, mouldable shaping, but its mobility, thermotolerance is all not as PET, and price is higher.PET and PBT chemical structure is similar, and therefore, consistency is fine, and can learn from other's strong points to offset one's weaknesses after both are blended, the shock strength of products obtained therefrom is high and cost is lower.PBT/PET alloy also has excellent chemical stability, thermostability, intensity, rigidity and wear resistant, and its goods have good gloss, but the flame retardant properties of PBT/PET is bad.Add fire retardant and fire-retardant finish is carried out to PBT/PET alloy, material combustion can be stoped or delay spreading of the intensity of a fire.Although the flame retardant effect of the halogenated flame retardant that current application is more is fine, may toxic substance be produced in fire-retardant process, unhealthful.Along with people are to the pay attention to day by day of environmental protection, the non-halogen main development direction having become material flame-retarded technology.

Summary of the invention

The object of the present invention is to provide a kind of Halogen, safety, low cigarette, nontoxic, efficient environment-friendly flame retardant PBT/PET alloy and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: environment-friendly flame retardant PBT/PET alloy, and its component by mass percent proportioning is: PBT 30% ~ 60%, PET 30% ~ 60%, Compositional type halogen-free flame retardants 15% ~ 25%, nucleator 0.5% ~ 2%, nucleation accelerating agent 0.1% ~ 1%, lubricant 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 1%, photostabilizer 0.1% ~ 1%.

Described PBT is polybutylene terephthalate.

Described PET is polyethylene terephthalate.

Described Compositional type halogen-free flame retardants is the compound of the nano-sized magnesium hydroxide 25wt% three mixing that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent.

Described nucleator is talcum powder.

Described nucleation accelerating agent is benzophenone or dimethyl phthalate.

Described lubricant is the one in calcium stearate, Magnesium Stearate, pentaerythritol ester, ethylene bis stearic amide (EBS).

Described oxidation inhibitor is the compound of hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.

Described photostabilizer is ESCALOL 567.

The preparation method of above-mentioned environment-friendly flame retardant PBT/PET alloy, 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, stand-by;

(2) the nano-sized magnesium hydroxide 25wt% that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent is taken by weight ratio, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, then at 80 DEG C ~ 120 DEG C dry 30 ~ 45 minutes, stand-by;

(3) dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 2 ~ 5 minutes, add the Compositional type halogen-free flame retardants, nucleator, nucleation accelerating agent, lubricant, oxidation inhibitor and the photostabilizer that take by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(4) add in twin screw extruder by the compound of step (3), at 170 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains environment-friendly flame retardant PBT/PET alloy of the present invention.

The invention has the beneficial effects as follows, compared with prior art, the PBT/PET alloy that the present invention obtains combines PBT and PET advantage separately preferably, and have excellent over-all properties, its impact is good, thermotolerance is high, processibility is good, dimensional stabilizing, and good flame retardation effect, there is Halogen, safety, low cigarette, nontoxic, efficient and reach the fire-retardant rank of UL94 V-0, the industries such as household electrical appliances, electronic apparatus, automotive industry, weaving can be adapted to.

Embodiment

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

Embodiment 1:

A kind of environment-friendly flame retardant PBT/PET alloy, its component by mass percent proportioning is: compound 0.8%, the ESCALOL 567 0.5% of PBT 45%, PET 30%, Compositional type halogen-free flame retardants 21%, talcum powder 1%, benzophenone 0.2%, calcium stearate 1.5%, hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate; Described Compositional type halogen-free flame retardants is the compound of the nano-sized magnesium hydroxide 25wt% three mixing that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent.

Preparation method: (1) is 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, stand-by; (2) the nano-sized magnesium hydroxide 25wt% that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent is taken by weight ratio, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, then at 80 DEG C ~ 120 DEG C dry 30 ~ 45 minutes, stand-by; (3) dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 2 ~ 5 minutes, add compound and the ESCALOL 567 of Compositional type halogen-free flame retardants, talcum powder, benzophenone, calcium stearate, hindered phenol antioxygen 1076 and the phosphite ester kind antioxidant 168 taken by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (4) add in twin screw extruder by the compound of step (3), at 170 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains environment-friendly flame retardant PBT/PET alloy of the present invention.

Embodiment 2:

A kind of environment-friendly flame retardant PBT/PET alloy, its component by mass percent proportioning is: compound 1%, the ESCALOL 567 0.3% of PBT 39%, PET 39%, Compositional type halogen-free flame retardants 18%, talcum powder 1.5%, dimethyl phthalate 0.2%, ethylene bis stearic amide (EBS) 1%, hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate; Described Compositional type halogen-free flame retardants is the compound of the nano-sized magnesium hydroxide 25wt% three mixing that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent.

Preparation method: (1) is 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, stand-by; (2) the nano-sized magnesium hydroxide 25wt% that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent is taken by weight ratio, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, then at 80 DEG C ~ 120 DEG C dry 30 ~ 45 minutes, stand-by; (3) dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 2 ~ 5 minutes, add compound and the ESCALOL 567 of Compositional type halogen-free flame retardants, talcum powder, dimethyl phthalate, ethylene bis stearic amide (EBS), hindered phenol antioxygen 1076 and the phosphite ester kind antioxidant 168 taken by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (4) add in twin screw extruder by the compound of step (3), at 170 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains environment-friendly flame retardant PBT/PET alloy of the present invention.

Claims (8)

1. environment-friendly flame retardant PBT/PET alloy, it is characterized in that, its component by mass percent proportioning is: PBT 30% ~ 60%, PET 30% ~ 60%, Compositional type halogen-free flame retardants 15% ~ 25%, nucleator 0.5% ~ 2%, nucleation accelerating agent 0.1% ~ 1%, lubricant 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 1%, photostabilizer 0.1% ~ 1%.

2. environment-friendly flame retardant PBT/PET alloy according to claim 1, it is characterized in that, described Compositional type halogen-free flame retardants is the compound of the nano-sized magnesium hydroxide 25wt% three mixing that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent.

3. environment-friendly flame retardant PBT/PET alloy according to claim 1, is characterized in that, described nucleator is talcum powder.

4. environment-friendly flame retardant PBT/PET alloy according to claim 1, is characterized in that, described nucleation accelerating agent is benzophenone or dimethyl phthalate.

5. environment-friendly flame retardant PBT/PET alloy according to claim 1, is characterized in that, described lubricant is the one in calcium stearate, Magnesium Stearate, pentaerythritol ester, ethylene bis stearic amide (EBS).

6. environment-friendly flame retardant PBT/PET alloy according to claim 1, is characterized in that, described oxidation inhibitor is the compound of hindered phenol antioxygen 1076 and phosphite ester kind antioxidant 168.

7. environment-friendly flame retardant PBT/PET alloy according to claim 1, is characterized in that, described photostabilizer is ESCALOL 567.

8. the preparation method of environment-friendly flame retardant PBT/PET alloy 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, stand-by;

(2) the nano-sized magnesium hydroxide 25wt% that polyphosphoric acid amine (APP) 50wt%, branched polysiloxane 25wt% and surface activate through silane coupling agent is taken by weight ratio, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, then at 80 DEG C ~ 120 DEG C dry 30 ~ 45 minutes, stand-by;

(3) dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 2 ~ 5 minutes, add the Compositional type halogen-free flame retardants, nucleator, nucleation accelerating agent, lubricant, oxidation inhibitor and the photostabilizer that take by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(4) add in twin screw extruder by the compound of step (3), at 170 DEG C ~ 260 DEG C, through plastifying, mixing is extruded, cooling granulation, obtains environment-friendly flame retardant PBT/PET alloy of the present invention.