CN104845056A - Filled and reinforced PBT composite material - Google Patents

Abstract

The present invention discloses a filled and reinforced PBT composite material, which comprises, by mass, 70-85% of PBT, 5-20% of a filler, 3-8% of SMA, 2-6% of antistatic masterbatch, 0.1-0.3% of a silane coupling agent, 0.5-1.5% of a stabilizer, 0.1-0.5% of pyromellitic dianhydride, 0.1-1% of ethylenebis(stearamide), and 0.1-0.5% of an antioxidant, wherein the filler is heavy calcium carbonate with a particle size of less than 5 [mu]m. The filled and reinforced PBT composite material of the present invention has beneficial effects of excellent notch impact toughness, excellent rigidity, excellent heat resistance, good mechanical strength maintaining, good antistatic property, good processability, strong aging resistance, stable performance, easy processing, and low cost, and can be used in the fields of electronic appliances, vehicle industry, machinery parts and the like.

Description

A kind of filling strengthens PBT composite

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of filling strengthens PBT composite.

Background technology

Polybutylene terephthalate (being called for short PBT) is the linear saturated polyester resin of a kind of crystal type, the fields such as electronic apparatus, household electrical appliances, automotive industry are widely used at present, but PBT is used alone shortcomings such as there is notched Izod impact strength is low, fragility large, facile hydrolysis, limits its range of application.

Summary of the invention

The filling that the object of the present invention is to provide a kind of good combination property, stable performance and cost low strengthens PBT composite.

The technical solution adopted for the present invention to solve the technical problems is: a kind of filling strengthens PBT composite, and its component by mass percent proportioning is: PBT 70% ~ 85%, filler 5% ~ 20%, SMA 3% ~ 8%, antistatic master granule 2% ~ 6%, silane coupling agent 0.1% ~ 0.3%, stablizer 0.5% ~ 1.5%, pyromellitic dianhydride 0.1% ~ 0.5%, ethylene bis stearic amide 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 0.5%.

Described PBT is polybutylene terephthalate resin.

Described filler is the water-ground limestone that particle diameter is less than 5 μm.

Described SMA is styrene-grafted copolymer-maleic anhydride, has compatible, toughness reinforcing effect.

The antistatic master granule that described antistatic master granule is made up of PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt%.

Described stablizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1.

Described oxidation inhibitor is the antioxidant 1076 of mass ratio 1:1 and the compound of irgasfos 168.

A kind of preparation method filling enhancing PBT composite of the present invention, comprises the following steps:

(1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, make moisture control below 0.03%, stand-by;

(2), antistatic master granule is prepared: take PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt% by mass percent content, add after stirring in super mixer, discharging adds that twin screw extruder melt extrudes, cooling granulation and dry after obtained antistatic master granule, stand-by;

(3), by mass percent proportioning take filler and silane coupling agent, add sonic oscillation producer or be not less than in the super mixer of 3000 revs/min, stir 10 ~ 60 minutes at 80 DEG C ~ 110 DEG C temperature, be then cooled to lower than 40 DEG C of dischargings, stand-by;

(4), take step (1) by mass percent proportioning and obtain the material that dry PBT and step (3) obtain, add in super mixer and mix, then the antistatic master granule obtained that the SMA, stablizer, pyromellitic dianhydride, ethylene bis stearic amide, oxidation inhibitor and the step (2) that take by mass percent proportioning are obtained is added, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(5), add in twin screw extruder by the compound that step (4) obtains, controlling screw speed is 120 ~ 400 revs/min, and barrel zone temperature, at 170 DEG C ~ 230 DEG C, to be extruded, granulation after twin screw extruder blended melting, namely obtains the present invention.

The invention has the beneficial effects as follows, the present invention has the good mechanical strength of excellent notch impact toughness, rigidity, thermotolerance and maintenance, and antistatic property and good processability, ageing-resistant performance is strong, stable performance, be easy to processing, cost is low, the fields such as electronic apparatus, automotive industry, mechanical fitting can be suitable for.

Embodiment

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

A kind of filling strengthens PBT composite, and its component by mass percent proportioning is: water-ground limestone 12%, SMA 8%, antistatic master granule 6%, silane coupling agent 0.2%, stablizer 1%, pyromellitic dianhydride 0.5%, ethylene bis stearic amide 1%, oxidation inhibitor 0.3% that PBT 71%, particle diameter are less than 5 μm.Wherein, described PBT is polybutylene terephthalate resin; Described SMA is styrene-grafted copolymer-maleic anhydride, has compatible, toughness reinforcing effect; The antistatic master granule that described antistatic master granule is made up of PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt%; Described stablizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1; Described oxidation inhibitor is the antioxidant 1076 of mass ratio 1:1 and the compound of irgasfos 168.

Its preparation method is: (1), by PBT at 130 DEG C ~ 140 DEG C dry 3 ~ 5 hours, make moisture control below 0.03%, stand-by; (2), antistatic master granule is prepared: take PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt% by mass percent content, add after stirring in super mixer, discharging adds that twin screw extruder melt extrudes, cooling granulation and dry after obtained antistatic master granule, stand-by; (3), take by mass percent proportioning water-ground limestone and the silane coupling agent that particle diameter is less than 5 μm, add sonic oscillation producer or be not less than in the super mixer of 3000 revs/min, stir 10 ~ 60 minutes at 80 DEG C ~ 110 DEG C temperature, be then cooled to lower than 40 DEG C of dischargings, stand-by; (4), take step (1) by mass percent proportioning and obtain the material that dry PBT and step (3) obtain, add in super mixer and mix, then the antistatic master granule obtained that the SMA, stablizer, pyromellitic dianhydride, ethylene bis stearic amide, oxidation inhibitor and the step (2) that take by mass percent proportioning are obtained is added, make to stir 3 ~ 15 minutes together, after fully mixing, discharging; (5), add in twin screw extruder by the compound that step (4) obtains, controlling screw speed is 120 ~ 400 revs/min, and barrel zone temperature, at 170 DEG C ~ 230 DEG C, to be extruded, granulation after twin screw extruder blended melting, namely obtains the present invention.

Claims (6)

1. fill enhancing PBT composite for one kind, it is characterized in that, its component by mass percent proportioning is: PBT 70% ~ 85%, filler 5% ~ 20%, SMA 3% ~ 8%, antistatic master granule 2% ~ 6%, silane coupling agent 0.1% ~ 0.3%, stablizer 0.5% ~ 1.5%, pyromellitic dianhydride 0.1% ~ 0.5%, ethylene bis stearic amide 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 0.5%.

2. one according to claim 1 is filled and is strengthened PBT composite, and it is characterized in that, described filler is the water-ground limestone that particle diameter is less than 5 μm.

3. one according to claim 1 is filled and is strengthened PBT composite, it is characterized in that, the antistatic master granule that described antistatic master granule is made up of PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt%.

4. one according to claim 1 is filled and is strengthened PBT composite, and it is characterized in that, described stablizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1.

5. one according to claim 1 is filled and is strengthened PBT composite, and it is characterized in that, described oxidation inhibitor is the antioxidant 1076 of mass ratio 1:1 and the compound of irgasfos 168.

6. a kind of preparation method filling enhancing PBT composite 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, make moisture control below 0.03%, stand-by;

(2), antistatic master granule is prepared: take PBT resin 30wt%, sodium alkyl benzene sulfonate 40wt%, stearic acid monoglycerides 25wt% and pentaerythritol stearate 5wt% by mass percent content, add after stirring in super mixer, discharging adds that twin screw extruder melt extrudes, cooling granulation and dry after obtained antistatic master granule, stand-by;

(3), by mass percent proportioning take filler and silane coupling agent, add sonic oscillation producer or be not less than in the super mixer of 3000 revs/min, stir 10 ~ 60 minutes at 80 DEG C ~ 110 DEG C temperature, be then cooled to lower than 40 DEG C of dischargings, stand-by;

(4), take step (1) by mass percent proportioning and obtain the material that dry PBT and step (3) obtain, add in super mixer and mix, then the antistatic master granule obtained that the SMA, stablizer, pyromellitic dianhydride, ethylene bis stearic amide, oxidation inhibitor and the step (2) that take by mass percent proportioning are obtained is added, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(5), add in twin screw extruder by the compound that step (4) obtains, controlling screw speed is 120 ~ 400 revs/min, and barrel zone temperature, at 170 DEG C ~ 230 DEG C, to be extruded, granulation after twin screw extruder blended melting, namely obtains the present invention.