CN108285629A

CN108285629A - A kind of PC/ABS/PA6 compositions and preparation method thereof

Info

Publication number: CN108285629A
Application number: CN201710906371.XA
Authority: CN
Inventors: 张超; 毕静利; 张艳君; 张伟; 王静; 张良芳
Original assignee: Liaocheng Western Shandong Merlon Co Ltd
Current assignee: Liaocheng Western Shandong Merlon Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2018-07-17
Anticipated expiration: 2037-09-29
Also published as: CN108285629B

Abstract

The invention discloses a kind of PC/ABS/PA6 compositions and preparation method thereof, and component is by mass percentage：Makrolon 60%~80%, polyamide 15%~35%, ABS 5%~25%, compatilizer 2%~10%, toughener 2%~10%, inorganic particulate 1%~10%, lubricant 0.1%~1%, antioxidant 0.1%~1%.The beneficial effects of the invention are as follows each components to be uniformly dispersed in PC, and compatilizer and toughener collective effect improve the impact strength of alloy.

Description

A kind of PC/ABS/PA6 compositions and preparation method thereof

Technical field：

The invention belongs to technical field of polymer materials, it is related to a kind of PC/ABS/PA6 compositions and preparation method thereof.

Technical background：

Makrolon (PC) has excellent mechanical performance, and especially prominent is its mechanical property and translucency, is had Preferable heat resistance, the disadvantage is that endurance life, stress crack resistant, wearability and acid and alkali corrosion is poor, melt viscosity High, poor fluidity, influences product molding.

Polycaprolactam (PA6) is a kind of crystalline thermoplastic resin, has excellent wearability, chemical-resistant, good Processing fluidity, but water absorption rate high and low temperature toughness and heat resistance are slightly poor.

Acrylonitrile-butadiene-styrene (ABS) (ABS) good mechanical performance, has many advantages, such as easy processing easy coloring, and price compared with It is low, but weatherability is poor, and heat distortion temperature is low.

PC/ABS is a kind of alloy of technology maturation, combines the excellent specific property of two kinds of materials, processing performance and mechanical property Can be excellent, but stress crack resistant and wear-resisting property are bad.

PA6 is added in PC, can improve the wear-resisting property of material and makes alloy that there is natural matt color, can be used for electricity Sub- electric appliance casing and automotive trim, but PC and PA6 compatibilities are not good enough, and alloy impact strength is weaker.

Invention content:

To overcome problem above, the present invention provides PC/ABS/PA6 compositions and its preparation side of a kind of excellent combination property Method.

To achieve the above object, the present invention uses following technical proposals：

A kind of PC/ABS/PA6 compositions of excellent combination property, the composition include following components and content (w%)：It is poly- Carbonic ester 60%~80%, polyamide 15%~35%, ABS 5%~25%, compatilizer 2%~10%, toughener 2%~ 10%, inorganic particulate 1%~10%, lubricant 0.1%~1%, antioxidant 0.1%~1%.

The compatilizer, toughener, inorganic particulate, lubricant, antioxidant content be with the total amount of PC, PA6, ABS Benchmark.

The makrolon is bisphenol A polycarbonate, the preferred 24000-28000 of molecular weight.

The polyamide is polycaprolactam (PA6), relative viscosity preferably 2.8~3.0.

The ABS is the acrylonitrile/butadiene/styrene copolymer of glue content 25%~65%.

The compatilizer is styrene-grafted maleic anhydride (SMA), acrylonitrile-butadiene-styrene copolymer grafting horse Carry out acid anhydrides (ABS-g-MAH), the two ratio is preferably with 4：1 is used in compounding.

The toughener is methyl methacrylate/butadiene/styrene copolymers (MBS).

The inorganic particulate is calcium carbonate or talcum powder, and inorganic ions diameter is preferably smaller than 2.5um.

The lubricant is one kind in pentaerythritol stearate or ethylene bis stearamide.

The antioxidant is the compound of Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168, it is preferable that two Person's ratio is 1：6.

The preparation method of the PC/PA6/ABS compositions：

1, PC is put into 120 DEG C of baking ovens and dries 4h, ABS is put into after drying 2h in 85 DEG C of baking ovens, weigh two in proportion Kind material and antioxidant, mix 5min, in 240-260 DEG C of double screw extruder in high mixer under the conditions of 300-600rpm It is blended, squeezed out, being cooled down, pelletizing, formed PC/ABS and premix alloy.

2, PA6 is put into 80 DEG C of baking ovens and dries 8h, after PC/ABS premix alloys are dried 4h in 90 DEG C of baking ovens, by matching Than each component is weighed；

3, each component is put into 300-800rpm in high-speed mixer to mix 10 minutes, forms uniformly mixed material.

4, mixture is put into extruder, is blended, squeezed out, cooled down, is cut in 220-240 DEG C of double screw extruder Grain.

Beneficial effects of the present invention：

1, PC and ABS are squeezed out in advance, provides condition for next step low temperature process, co-mixing system processing fluidity is more It is good, it ensure that the uniformity of each component dispersion.

2, coupling reaction occurs for the Amino End Group of the anhydride group in compatilizer and PA6, improves the combination of PA6 and PC/ABS Power significantly improves the impact strength of PC/PA6/ABS blends.

3, elastic body toughening agent and rigid particles individually toughening can also can form inorganic particulate as core, elastic body toughening agent For the core-shell morphology of shell, coordination plasticizing effect is played, ensure that the impact strength of composition and its stabilization of performance.

4, when PC/PA6/ABS compositions are used in special-purpose, each component ratio can be adjusted according to actual needs.

Specific implementation mode:

In embodiment 1-6, PC is put into 120 DEG C of baking ovens and dries 4h, ABS is put into 85 DEG C of baking ovens and dries 2h, by than Example weighs two kinds of materials and antioxidant, 5min is mixed under the conditions of 300-600rpm in high mixer, in 220-260 DEG C of twin-screw Middle extruder is blended, squeezed out, being cooled down, pelletizing, is formed PC/ABS and is premixed particle.

PC/ABS premix particles are dried into 4h in 90 DEG C of baking ovens, PA6 is put into 80 DEG C of baking ovens after drying 8h, according to the form below ratio Example is weighed, wherein premix particle is weighed by PC, ABS, antioxidant total amount, each component is put into 300-800rpm in high-speed mixer Mixing is put into extruder after ten minutes, is blended, is squeezed out in 220-240 DEG C of double screw extruder, cooled down, pelletizing, added Work flow chart is shown in attached drawing 1.

It is not added with compatilizer, melt strength is inadequate when extrusion, and tie rod is easily broken, gained alloy impact strength very little (comparative example 1)； After compatilizer is added, squeezes out tie rod and stablize, alloy comprehensive performance increases, and especially impact strength has clear improvement (right Ratio 2), it is seen then that the binding force at the addition enhancing interface of compatilizer, the impact for significantly improving PC/PA6/ABS blends are strong Degree.

After elastic body toughening agent or rigid particles are added into alloy, the impact strength of alloy can be made further to carry Height, the two are added simultaneously, while impact strength being made to greatly improve, ensure alloy tensile, bending property stabilization (comparative example 3, comparative example 4, embodiment 2).

The addition increase of elastic body toughening agent MBS can make alloy impact strength significantly improve (embodiment 1, embodiment 2, Embodiment 3), the reason is that MBS has played the effect of surfactant in the alloy, while there is preferable compatibility with compatilizer, The binding force at interface is increased, and the rubber phase in MBS will produce crazing under impact stress effect, the impact for improving material is strong Degree.

When within inorganic particulate addition 8%, after being improved with addition, stretching, bending, impact property slightly improve, and add It is more than to be improved with inorganic particulate addition after 8% to enter amount, is stretched, bending property significantly improves, and impact property can decrease (embodiment 3, embodiment 4, embodiment 5), reason are inorganic particulate part and elastic body toughening dosage form into core-shell morphology, play association Same toughening effect, but after content of inorganic particles is excessively high, the inorganic particulate of independent dispersion will continue to enhancing stretch bending performance, but close The decline of golden impact flexibility.

When PC, PA6, ABS changes of contents, alloy mechanical property can change, and PC contents increase, and PA6 is reduced with ABS contents When, alloy impact property is increased slightly, and stretch bending performance slightly declines (embodiment 4, embodiment 6).

When PC/PA6/ABS compositions are used in special-purpose, each component ratio can be adjusted according to actual needs.

Claims

1. a kind of PC/ABS/PA6 compositions, which is characterized in that include following components and content (w%)：

2. PC/ABS/PA6 compositions as described in claim 1, which is characterized in that the makrolon is poly- for bisphenol A-type Carbonic ester；The polyamide is polycaprolactam (PA6)；The ABS be glue content 25%~65% acrylonitrile/butadiene/ Styrol copolymer.

3. PC/ABS/PA6 compositions as described in claim 1, which is characterized in that the compatilizer is styrene-grafted Malaysia The compound of both acid anhydrides (SMA) and acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride (ABS-g-MAH) mixing.

4. PC/ABS/PA6 compositions as described in claim 1, which is characterized in that the toughener is methyl methacrylate Ester/butadiene/styrene copolymers (MBS), the preferred diameter of inorganic particulate are less than 2.5 μm of calcium carbonate or talcum powder.

5. PC/ABS/PA6 compositions as described in claim 1, which is characterized in that the lubricant is pentaerythrite stearic acid One kind in ester or ethylene bis stearamide；The antioxidant is Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168 with 1：The compound of 6 mixing.

6. the preparation method of PC/ABS/PA6 compositions as described in claim 1, which is characterized in that it has steps of：

(1), PC is put into 120 DEG C of baking ovens and dries 4h, ABS is put into 85 DEG C of baking ovens and dries 2h, weigh two kinds of trees in proportion Fat and antioxidant, mix 5min in high mixer under the conditions of 300-600rpm, carried out in 220-260 DEG C of double screw extruder Blending extrusion, cooling, pelletizing form PC/ABS and premix particle.

(2), PC/ABS premix particles are dried into 4h in 90 DEG C of baking ovens, PA6 is put into 80 DEG C of baking ovens after drying 8h, by each component It weighs in proportion, is put into 300-800rpm mixing in high-speed mixer and is put into extruder after ten minutes, in 220-240 DEG C of double spiral shells Blending extrusion, cooling, pelletizing are carried out in bar extruder, prepare the composition particle.