CN104845061A - Glass fiber reinforced hydrolysis-resistance PBT powder and preparation method thereof - Google Patents

Abstract

The present invention discloses glass fiber reinforced hydrolysis-resistance PBT powder and a preparation method thereof. The glass fiber reinforced hydrolysis-resistance PBT powder comprises, by mass, 60-85% of PBT, 5-15% of glass fibers, 3-8% of MBS, 2-5% of SMA, 0.5-1.5% of carbodiimide, 0.1-0.5% of pyromellitic dianhydride, 0.2-1.5% of a stabilizer, 0.1-0.5% of an antioxidant, and 0.1-1% of ethylenebis(stearamide). According to the present invention, with the glass fiber reinforcing, the MBS toughening, the carbodiimide and pyromellitic dianhydride synergy hydrolysis resistance effect, the mechanical strength, the notch impact toughness, the heat resistance, the hydrolysis resistance and the like are substantially improved, the processing fluidity is good, the electrical property and the corrosion resistance are excellent, the appearance is good, the performance is stable, the preparation process is simple, and the cost is low.

Description

Fiberglass reinforced hydrolysis PBT powder and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of fiberglass reinforced hydrolysis PBT powder and preparation method thereof.

Background technology

PBT(polybutylene terephthalate) with performances such as the thermotolerance of its excellence, resistance to fatigue, weather resisteant, low-friction coefficients, be widely used in the fields such as automobile, mechanical means, electronic apparatus, and become a member important in five large-engineering plastics.But, due in PBT molecule containing ester bond, be placed in water under higher than its vitrification point and easily ester linkage breaking occur, the sour environment that hydrolysis reaction is formed makes hydrolysis reaction accelerate, and performance sharply declines, impact use.

Summary of the invention

The object of the present invention is to provide fiberglass reinforced hydrolysis PBT powder of the good and stable performance of a kind of mechanical property and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: fiberglass reinforced hydrolysis PBT powder, and its component by mass percent proportioning is: PBT 60% ~ 85%, glass fibre 5% ~ 15%, MBS 3% ~ 8%, SMA 2% ~ 5%, carbodiimide 0.5% ~ 1.5%, pyromellitic dianhydride 0.1% ~ 0.5%, stablizer 0.2% ~ 1.5%, oxidation inhibitor 0.1% ~ 0.5%, ethylene bis stearamide 0.1% ~ 1%.

Described PBT is polybutylene terephthalate.

The alkali-free short glass fiber of described fiberglass surfacing after Silane coupling agent KH550 process.

Described MBS is methacrylate butadi ene styrene copolymer.

Described SMA is styrene-maleic anhydride copolymer.

Described stablizer is N, N-4,4-diphenyl methane dimaleimide.

Described oxidation inhibitor is the compound of Hinered phenols antioxidant 1010 and phosphite ester kind antioxidant 168.

The preparation method of fiberglass reinforced hydrolysis PBT powder of the present invention, comprises the following steps:

(1), by PBT at 120 DEG C ~ 130 DEG C dry 4 ~ 6 hours, make moisture control below 0.03%, stand-by;

(2), take step (1) by mass percent proportioning to obtain dry PBT and add in super mixer, add the MBS, SMA, carbodiimide, pyromellitic dianhydride, stablizer, oxidation inhibitor, the ethylene bis stearamide that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(3) compound, step (2) obtained and add main spout and time spout of twin screw extruder by the glass fibre that mass percent proportioning takes respectively, controlling screw speed is 120 ~ 500 revs/min, barrel zone temperature is at 170 DEG C ~ 230 DEG C, by extruding after twin screw extruder blended melting, cooling, granulation, after drying, be broken into fine powder by plastic crusher again and sieve, choose 150 ~ 240 object compositions, namely obtain the present invention.

The invention has the beneficial effects as follows, the present invention is toughness reinforcing with fiberglass reinforced, MBS, carbodiimide and pyromellitic dianhydride work in coordination with hydrolysis effect, substantially increase mechanical strength, notched Izod impact hit toughness, thermotolerance and hydrolytic resistance etc., and processing fluidity is good, electrical property and fine corrosion resistance, outward appearance is good, stable performance, preparation technology is simple simultaneously, and cost is low.

Embodiment

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

A kind of fiberglass reinforced hydrolysis PBT powder, its component by mass percent proportioning is: PBT 68%, glass fibre 15%, MBS 8%, SMA 5%, carbodiimide 1.5%, pyromellitic dianhydride 0.5%, N, N-4,4-diphenyl methane dimaleimide 1%, oxidation inhibitor 0.2%, ethylene bis stearamide 0.8%.Wherein, described PBT is polybutylene terephthalate; The alkali-free short glass fiber of described fiberglass surfacing after Silane coupling agent KH550 process; Described MBS is methacrylate butadi ene styrene copolymer; Described SMA is styrene-maleic anhydride copolymer; Described oxidation inhibitor is the compound of Hinered phenols antioxidant 1010 and phosphite ester kind antioxidant 168.

Its preparation method is: (1), by PBT at 120 DEG C ~ 130 DEG C dry 4 ~ 6 hours, make moisture control below 0.03%, stand-by; (2), take step (1) by mass percent proportioning to obtain dry PBT and add in super mixer, add the MBS, SMA, carbodiimide, pyromellitic dianhydride, the N that take by mass percent proportioning simultaneously, N-4,4-diphenyl methane dimaleimide, oxidation inhibitor, ethylene bis stearamide, make to stir 3 ~ 15 minutes together, after fully mixing, discharging; (3) compound, step (2) obtained and add main spout and time spout of twin screw extruder by the glass fibre that mass percent proportioning takes respectively, controlling screw speed is 120 ~ 500 revs/min, barrel zone temperature is at 170 DEG C ~ 230 DEG C, by extruding after twin screw extruder blended melting, cooling, granulation, after drying, be broken into fine powder by plastic crusher again and sieve, choose 150 ~ 240 object compositions, namely obtain the present invention.

Claims (5)

1. a fiberglass reinforced hydrolysis PBT powder, it is characterized in that, its component by mass percent proportioning is: PBT 60% ~ 85%, glass fibre 5% ~ 15%, MBS 3% ~ 8%, SMA 2% ~ 5%, carbodiimide 0.5% ~ 1.5%, pyromellitic dianhydride 0.1% ~ 0.5%, stablizer 0.2% ~ 1.5%, oxidation inhibitor 0.1% ~ 0.5%, ethylene bis stearamide 0.1% ~ 1%.

2. fiberglass reinforced hydrolysis PBT powder according to claim 1, is characterized in that, the alkali-free short glass fiber of described fiberglass surfacing after Silane coupling agent KH550 process.

3. fiberglass reinforced hydrolysis PBT powder according to claim 1, it is characterized in that, described stablizer is N, N-4,4-diphenyl methane dimaleimide.

4. fiberglass reinforced hydrolysis PBT powder according to claim 1, is characterized in that, described oxidation inhibitor is the compound of Hinered phenols antioxidant 1010 and phosphite ester kind antioxidant 168.

5. the preparation method of fiberglass reinforced hydrolysis PBT powder according to claim 1, is characterized in that, comprise the following steps:

(1), by PBT at 120 DEG C ~ 130 DEG C dry 4 ~ 6 hours, make moisture control below 0.03%, stand-by;

(2), take step (1) by mass percent proportioning to obtain dry PBT and add in super mixer, add the MBS, SMA, carbodiimide, pyromellitic dianhydride, stablizer, oxidation inhibitor, the ethylene bis stearamide that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(3) compound, step (2) obtained and add main spout and time spout of twin screw extruder by the glass fibre that mass percent proportioning takes respectively, controlling screw speed is 120 ~ 500 revs/min, barrel zone temperature is at 170 DEG C ~ 230 DEG C, by extruding after twin screw extruder blended melting, cooling, granulation, after drying, be broken into fine powder by plastic crusher again and sieve, choose 150 ~ 240 object compositions, namely obtain the present invention.