CN104629286A

CN104629286A - High-toughness flame-retardant weather-resistant PC / ABS alloy and preparation method thereof

Info

Publication number: CN104629286A
Application number: CN201310543664.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-06
Filing date: 2013-11-06
Publication date: 2015-05-20

Abstract

The invention discloses a high-toughness flame-retardant weather-resistant PC / ABS alloy and a preparation method thereof, and belongs to the technical field of high-molecular materials. The high-toughness flame-retardant weather-resistant PC / ABS alloy comprises the following components by weight: 40%-70% of PC, 20%-40% of ABS, 3%-8% of an impact modifier, 0.1%-0.1% of KFBS, 2%-6% of PDMS, 0.5%-2% of a light stabilizer, 1%-3% of a compatibilizer, 0.1%-0.5% of an antioxidant and 0.5%-1% of a lubricant. The invention has the beneficial effect that the alloy has the advantages of both PC and ABS, further has excellent flame retardant performance, and meets the performance requirements of no halogen, high efficiency, environment-friendliness, safety and grade UL94V-0; in addition, the alloy has high impact strength, good toughness, notched impact strength of up to 105kJ / m<2>, good anti-ageing and weathering performance and good processing fluidity.

Description

High tenacity flame-proof weather-resisting PC/ABS Alloy And Preparation Method

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of high tenacity flame-proof weather-resisting PC/ABS Alloy And Preparation Method.

Background technology

Polycarbonate (PC) is a kind of molecular chain repeating unit is the polymkeric substance of carbonate, has the advantages such as shock strength is high, creep resistance and good stability of the dimension, heat-resisting, transparent, water-intake rate is low, nontoxic, dielectric properties are excellent.But but there is processing fluidity difference, easily stress cracking in PC, to defects such as notch sensitive, easily wearing and tearing, chemical proofing are poor, on the high side, these deficiencies make its application in a lot of fields be restricted.Acrylonitrile-butadiene-styrene terpolymer (ABS) has good shock-resistance and processing fluidity, and low price.Blended for PC and the ABS PC/ABS of obtaining alloy can be made up the deficiency of one-component, reach the effect of learning from other's strong points to offset one's weaknesses.But PC/ABS belongs to the polymer alloy of limited compatibility, its consistency is not fine, the mechanical property of PC/ABS is caused not reach ideal effect, and flame retardant resistance is not high yet, easy generation catabiosis, therefore, usually need add three components and carry out modification in PC/ABS, to obtain the alloy system of high-performance, multifunction, meet the service requirements of numerous areas.

Summary of the invention

The object of the present invention is to provide a kind of high tenacity flame-proof weather-resisting PC/ABS Alloy And Preparation Method.

The technical solution adopted for the present invention to solve the technical problems is: high tenacity flame-proof weather-resisting PC/ABS alloy, and its component by mass percent proportioning is: PC 40% ~ 70%, ABS 20% ~ 40%, impact modifier 3% ~ 8%, KFBS 0.1% ~ 0.1%, PDMS 2% ~ 6%, photostabilizer 0.5% ~ 2%, expanding material 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.5% ~ 1%.

Described PC is bisphenol A polycarbonate, and its molecular weight is 20000 ~ 40000.

Described ABS is acrylonitrile-butadiene-styrene copolymer, and the mass percentage content of its each component is vinyl cyanide 10% ~ 30%, divinyl 15% ~ 30%, vinylbenzene 40% ~ 70%.

Described impact modifier is have the Methylacrylate-Acrylate Copolymer (ACR) of nucleocapsid structure or have the methacrylate butadi ene styrene copolymer (MBS) of nucleocapsid structure.

Described KFBS is perfluorinated sulfonic acid potassium fire retardant.

Described PDMS is polydimethylsiloxane fire retardant.

Described photostabilizer is the hindered amine as light stabilizer GW-944Z of mass ratio 1:1 and the compound of hindered amine as light stabilizer GW-622.

Described expanding material is MBS or polymethylmethacrylate.

Described oxidation inhibitor is the hindered phenol antioxygen 1010 of mass ratio 1:1 and the compound of phosphite antioxidant 168.

Described lubricant is pentaerythritol stearate (PETS).

The preparation method of above-mentioned high tenacity flame-proof weather-resisting PC/ABS alloy, comprises the following steps:

(1), by PC in blast drier at 110 DEG C ~ 130 DEG C temperature dry 3 ~ 4 hours, ABS at 80 DEG C ~ 90 DEG C dry 2 ~ 4 hours, stand-by;

(2), add in high-speed mixer by taking dry ABS by weight ratio, then the KFBS, PDMS, photostabilizer, oxidation inhibitor, the lubricant that take by weight ratio is added, after making to stir together 5 ~ 15 minutes and reaching and mix, discharging add carry out melt blending in twin screw extruder after extrude, cooling granulation, and stand-by after drying;

(3), the product taking dry PC and step (2) is by weight ratio added in high-speed mixer, then the impact modifier and expanding material that take by weight ratio is added, after making to stir together 3 ~ 10 minutes and reaching and mix, discharging adds in twin screw extruder, 250 DEG C ~ 290 DEG C extrude after abundant melt blending, cooling granulation, obtain high tenacity flame-proof weather-resisting PC/ABS alloy of the present invention.

The invention has the beneficial effects as follows, the present invention, while both PC, ABS advantage, has excellent flame retardant properties, and meets the performance requriements of Halogen, efficient, environmental protection, safety and UL94 V-0 level, and excellent in cushion effect, good toughness, notched Izod impact strength can reach 105kJ/m ²above, anti-aging weather resistance is strong simultaneously, and processing fluidity is good, in automobile, electronics, electrical equipment, instrument, communication etc., have good application prospect.

Embodiment

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

A kind of high tenacity flame-proof weather-resisting PC/ABS alloy, its component by mass percent proportioning is: PC 57%, ABS 25%, there is the methacrylate butadi ene styrene copolymer (MBS) 8% of nucleocapsid structure, KFBS 0.1%, PDMS 4%, the hindered amine as light stabilizer GW-944Z of mass ratio 1:1 and the compound 2% of hindered amine as light stabilizer GW-622, MBS or polymethylmethacrylate 3%, the hindered phenol antioxygen 1010 of mass ratio 1:1 and the compound 0.2% of phosphite antioxidant 168, pentaerythritol stearate (PETS) 0.7%.Wherein, described PC is bisphenol A polycarbonate, and its molecular weight is 20000 ~ 40000; Described ABS is acrylonitrile-butadiene-styrene copolymer, and the mass percentage content of its each component is vinyl cyanide 10% ~ 30%, divinyl 15% ~ 30%, vinylbenzene 40% ~ 70%; Described KFBS is perfluorinated sulfonic acid potassium fire retardant; Described PDMS is polydimethylsiloxane fire retardant.

Preparation method: (1), by PC in blast drier at 110 DEG C ~ 130 DEG C temperature dry 3 ~ 4 hours, ABS at 80 DEG C ~ 90 DEG C dry 2 ~ 4 hours, stand-by; (2), add in high-speed mixer by taking dry ABS by weight ratio, then add take by weight ratio KFBS, PDMS, the compound of the hindered amine as light stabilizer GW-944Z of mass ratio 1:1 and hindered amine as light stabilizer GW-622, the hindered phenol antioxygen 1010 of mass ratio 1:1 and phosphite antioxidant 168 compound, pentaerythritol stearate (PETS), after making to stir together 5 ~ 15 minutes and reaching and mix, discharging add carry out melt blending in twin screw extruder after extrude, cooling granulation, and stand-by after drying; (3), the product taking dry PC and step (2) is by weight ratio added in high-speed mixer, then the methacrylate butadi ene styrene copolymer (MBS) with nucleocapsid structure and MBS or polymethylmethacrylate that take by weight ratio is added, after making to stir together 3 ~ 10 minutes and reaching and mix, discharging adds in twin screw extruder, 250 DEG C ~ 290 DEG C extrude after abundant melt blending, cooling granulation, obtain high tenacity flame-proof weather-resisting PC/ABS alloy of the present invention.

Claims

1. a high tenacity flame-proof weather-resisting PC/ABS alloy, it is characterized in that, its component by mass percent proportioning is: PC 40% ~ 70%, ABS 20% ~ 40%, impact modifier 3% ~ 8%, KFBS 0.1% ~ 0.1%, PDMS 2% ~ 6%, photostabilizer 0.5% ~ 2%, expanding material 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.5% ~ 1%.

2. high tenacity flame-proof weather-resisting PC/ABS alloy according to claim 1, it is characterized in that, described impact modifier is have the Methylacrylate-Acrylate Copolymer (ACR) of nucleocapsid structure or have the methacrylate butadi ene styrene copolymer (MBS) of nucleocapsid structure.

3. high tenacity flame-proof weather-resisting PC/ABS alloy according to claim 1, is characterized in that, described photostabilizer is the hindered amine as light stabilizer GW-944Z of mass ratio 1:1 and the compound of hindered amine as light stabilizer GW-622.

4. high tenacity flame-proof weather-resisting PC/ABS alloy according to claim 1, it is characterized in that, described expanding material is MBS or polymethylmethacrylate.

5. the preparation method of high tenacity flame-proof weather-resisting PC/ABS alloy according to claim 1, is characterized in that, comprise the following steps: