CN104341726A - Halogen-free flame-retardant reinforced and toughened PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and preparation method - Google Patents

Abstract

The invention discloses a halogen-free flame-retardant reinforced and toughened PBT (polybutylene terephthalate)/PET (polyethylene terephthalate) alloy and a preparation method. The halogen-free flame-retardant reinforced and toughened PBT/PET alloy comprises the following components bye mass: 20%-50% of PBT, 20%-50% of PET, 10%-25% of glass fiber, 5%-15% of a compound halogen-free flame-retardant agent, 10%-15% of a toughening agent, 0.1%-1% of a chain extender, 0.1%-1% of a nucleation agent, 0.5%-2% of a hydrolysis resistant stabilizer, 0.5%-1% of an antioxidant, and 0.1%-2% of a dispersant. The beneficial effect is in that by glass fiber reinforcement and halogen-free flame-retardant toughening modification, the prepared alloy system not only has the respective advantages of PBT and PET, also has high strength, good toughness, heat resistance, corrosion resistance, excellent electrical performance, good flame retardant performance, high gloss, good processing, low cost, and remarkable social and economic benefits, and can be widely used in the fields of textiles, home appliances, automobiles, electronic and electrical appliances, and the like.

Description

Halogen-free flameproof activeness and quietness PBT/PET Alloy And Preparation Method

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of halogen-free flameproof activeness and quietness PBT/PET Alloy And Preparation Method.

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 keep good mechanical property in wide temperature range.But there is the shortcomings such as notched Izod impact strength is low, heat-drawn wire is low, shrinking percentage is large, flame retardant resistance is bad in PBT/PET alloy, significantly limit its application, therefore, be necessary to carry out modification to PBT/PET alloy, to widen its range of application.

Summary of the invention

The object of the present invention is to provide a kind of halogen-free flameproof activeness and quietness PBT/PET Alloy And Preparation Method.

The technical solution adopted for the present invention to solve the technical problems is: halogen-free flameproof activeness and quietness PBT/PET alloy, and its component by mass percent proportioning is: PBT 20% ~ 50%, PET 20% ~ 50%, glass fibre 10% ~ 25%, Compositional type halogen-free flame retardants 5% ~ 15%, toughner 10% ~ 15%, chainextender 0.1% ~ 1%, nucleator 0.1% ~ 1%, stabilisers against hydrolysis 0.5% ~ 2%, oxidation inhibitor 0.5% ~ 1%, dispersion agent 0.1% ~ 2%.

Described PBT is polybutylene terephthalate.

Described PET is polyethylene terephthalate, its intrinsic viscosity 0.7 ~ 1.0dL/g.

Described glass fibre is the alkali free glass fibre of surface through silane coupling agent process.

Described Compositional type halogen-free flame retardants is the compound of polyphenylene phosphonic acids sulfobenzide ester 40wt%, polysiloxane 40wt% and magnesium hydroxide 20wt% three mixing, and wherein magnesium hydroxide surface is through silane coupler modified process and modified particle diameter is less than 2 μm.

Described toughner is maleic anhydride graft macromolecular elastomer, preferred EPDM-g-MAH, SBS-g-MAH, POE-g-MAH, TPU-g-MAH, NBR-g-MAH.

Described chainextender is triphenyl phosphite.

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, chloro-benzoic acid sodium.

Described stabilisers against hydrolysis is carbodiimide.

Described oxidation inhibitor is the compound of antioxidant 1076 or antioxidant 1076 and irgasfos 168.

Described dispersion agent is TAS-2A dispersion agent.

The preparation method of above-mentioned halogen-free flameproof activeness and quietness 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), take polyphenylene phosphonic acids sulfobenzide ester 40wt% by weight ratio, magnesium hydroxide 20wt% that polysiloxane 40wt% and surface particle diameter after silane coupler modified process is less than 2 μm, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, stand-by;

(3), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the Compositional type halogen-free flame retardants, toughner, chainextender, nucleator, stabilisers against hydrolysis, oxidation inhibitor and the dispersion agent that take by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(4), the compound of step (3) is added the main spout of twin screw extruder, the glass fibre taken by weight ratio is added the side spout of twin screw extruder, controlled working temperature is at 210 DEG C ~ 260 DEG C, screw speed 200 ~ 500rpm, through twin screw extruder plasticizing mixing after extrude, cooling granulation, get product.

The invention has the beneficial effects as follows, compared with prior art, the present invention adopts fiberglass reinforced, halogen-free flameproof and toughening modifying, obtained alloy system not only has PBT and PET advantage separately, and intensity is high, good toughness, heat-resisting, erosion resistance and excellent electric properties, flame-retarded efficiency is good, glossiness is high, and processibility is good, and with low cost, its economic results in society are remarkable, can be widely used in the fields such as weaving, household electrical appliances, automobile, electronic apparatus.

Embodiment

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

Embodiment 1:

A kind of halogen-free flameproof activeness and quietness PBT/PET alloy, its component by mass percent proportioning is: PBT 30%, PET 30%, surface are through compound 1%, the TAS-2A dispersion agent 1% of the alkali free glass fibre 15% of silane coupling agent process, Compositional type halogen-free flame retardants 10%, EPDM-g-MAH 10%, triphenyl phosphite 0.8%, talcum powder 1%, carbodiimide 1.2%, antioxidant 1076 and irgasfos 168.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.7 ~ 1.0dL/g; Described Compositional type halogen-free flame retardants is the compound of polyphenylene phosphonic acids sulfobenzide ester 40wt%, polysiloxane 40wt% and magnesium hydroxide 20wt% three mixing, and wherein magnesium hydroxide surface is through silane coupler modified process and modified particle diameter is less than 2 μm.

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, stand-by; (2), take polyphenylene phosphonic acids sulfobenzide ester 40wt% by weight ratio, magnesium hydroxide 20wt% that polysiloxane 40wt% and surface particle diameter after silane coupler modified process is less than 2 μm, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, stand-by; (3), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add compound and the TAS-2A dispersion agent of Compositional type halogen-free flame retardants, EPDM-g-MAH, triphenyl phosphite, talcum powder, carbodiimide, antioxidant 1076 and the irgasfos 168 taken by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (4), the compound of step (3) is added the main spout of twin screw extruder, the surface taken by weight ratio is added the side spout of twin screw extruder through the alkali free glass fibre of silane coupling agent process, controlled working temperature is at 210 DEG C ~ 260 DEG C, screw speed 200 ~ 500rpm, through twin screw extruder plasticizing mixing after extrude, cooling granulation, get product.

Embodiment 2:

A kind of halogen-free flameproof activeness and quietness PBT/PET alloy, its component by mass percent proportioning is: PBT 34%, PET 20%, surface are through compound 1%, the TAS-2A dispersion agent 1.5% of the mixture 1% of the alkali free glass fibre 10% of silane coupling agent process, Compositional type halogen-free flame retardants 15%, POE-g-MAH 15%, triphenyl phosphite 1%, Sodium Benzoate and ethylene-methyl methacrylate sodium ion polymkeric substance, carbodiimide 1.5%, antioxidant 1076 and irgasfos 168.Wherein, described PBT is polybutylene terephthalate; Described PET is polyethylene terephthalate, its intrinsic viscosity 0.7 ~ 1.0dL/g; Described Compositional type halogen-free flame retardants is the compound of polyphenylene phosphonic acids sulfobenzide ester 40wt%, polysiloxane 40wt% and magnesium hydroxide 20wt% three mixing, and wherein magnesium hydroxide surface is through silane coupler modified process and modified particle diameter is less than 2 μm.

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, stand-by; (2), take polyphenylene phosphonic acids sulfobenzide ester 40wt% by weight ratio, magnesium hydroxide 20wt% that polysiloxane 40wt% and surface particle diameter after silane coupler modified process is less than 2 μm, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, stand-by; (3), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add compound and the TAS-2A dispersion agent of the mixture of Compositional type halogen-free flame retardants, POE-g-MAH, triphenyl phosphite, Sodium Benzoate and the ethylene-methyl methacrylate sodium ion polymkeric substance taken by weight ratio, carbodiimide, antioxidant 1076 and irgasfos 168 again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging; (4), the compound of step (3) is added the main spout of twin screw extruder, the surface taken by weight ratio is added the side spout of twin screw extruder through the alkali free glass fibre of silane coupling agent process, controlled working temperature is at 210 DEG C ~ 260 DEG C, screw speed 200 ~ 500rpm, through twin screw extruder plasticizing mixing after extrude, cooling granulation, get product.

Claims (6)

1. a halogen-free flameproof activeness and quietness PBT/PET alloy, it is characterized in that, its component by mass percent proportioning is: PBT 20% ~ 50%, PET 20% ~ 50%, glass fibre 10% ~ 25%, Compositional type halogen-free flame retardants 5% ~ 15%, toughner 10% ~ 15%, chainextender 0.1% ~ 1%, nucleator 0.1% ~ 1%, stabilisers against hydrolysis 0.5% ~ 2%, oxidation inhibitor 0.5% ~ 1%, dispersion agent 0.1% ~ 2%.

2. halogen-free flameproof activeness and quietness PBT/PET alloy according to claim 1, is characterized in that, described glass fibre is the alkali free glass fibre of surface through silane coupling agent process.

3. halogen-free flameproof activeness and quietness PBT/PET alloy according to claim 1, it is characterized in that, described Compositional type halogen-free flame retardants is the compound of polyphenylene phosphonic acids sulfobenzide ester 40wt%, polysiloxane 40wt% and magnesium hydroxide 20wt% three mixing, and wherein magnesium hydroxide surface is through silane coupler modified process and modified particle diameter is less than 2 μm.

4. halogen-free flameproof activeness and quietness PBT/PET alloy according to claim 1, it is characterized in that, described toughner is maleic anhydride graft macromolecular elastomer, preferred EPDM-g-MAH, SBS-g-MAH, POE-g-MAH, TPU-g-MAH, NBR-g-MAH.

5. halogen-free flameproof activeness and quietness PBT/PET alloy 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, chloro-benzoic acid sodium.

6. the preparation method of halogen-free flameproof activeness and quietness 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), take polyphenylene phosphonic acids sulfobenzide ester 40wt% by weight ratio, magnesium hydroxide 20wt% that polysiloxane 40wt% and surface particle diameter after silane coupler modified process is less than 2 μm, add after mixing in high-speed mixer, discharging obtains Compositional type halogen-free flame retardants, stand-by;

(3), dry PBT and PET is taken by weight ratio, add in high-speed mixer, mix 1 ~ 3 minute, add the Compositional type halogen-free flame retardants, toughner, chainextender, nucleator, stabilisers against hydrolysis, oxidation inhibitor and the dispersion agent that take by weight ratio again, continue mixing 5 ~ 15 minutes, make fully to mix rear discharging;

(4), the compound of step (3) is added the main spout of twin screw extruder, the glass fibre taken by weight ratio is added the side spout of twin screw extruder, controlled working temperature is at 210 DEG C ~ 260 DEG C, screw speed 200 ~ 500rpm, through twin screw extruder plasticizing mixing after extrude, cooling granulation, get product.