CN102030976B - PC-ASA alloy material and preparation method thereof - Google Patents

PC-ASA alloy material and preparation method thereof Download PDF

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CN102030976B
CN102030976B CN201010576688XA CN201010576688A CN102030976B CN 102030976 B CN102030976 B CN 102030976B CN 201010576688X A CN201010576688X A CN 201010576688XA CN 201010576688 A CN201010576688 A CN 201010576688A CN 102030976 B CN102030976 B CN 102030976B
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alloy material
asa
asa alloy
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CN102030976A (en
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谢迎洪
杨永佳
何征
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Huizhou Wote Advanced MaterialS Co Ltd
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Huizhou Wote Advanced MaterialS Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04Particle-shaped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/9258Velocity
    • B29C2948/9259Angular velocity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885Screw or gear

Abstract

The invention discloses a polycarbonate (PC)-acrylonitrile-styrene-acrylate (ASA) alloy material and a preparation method thereof. The alloy material comprises the following components in part by weight: 25 to 80 parts of PC, 3 to 18 parts of ASA terpolymer, 5 to 25 parts of organosilicon-polycarbonate block copolymer and 1 to 10 parts of acrylonitrile-styrene copolymer. In the PC-ASA alloy material, the PC and the ASA serve as a resin matrix; by adding the organosilicon-polycarbonate block copolymer, the internal stress of the resin matrix is effectively reduced, and the toughness of the PC-ASA alloy material is improved; the acrylonitrile-styrene copolymer effectively makes molecules of each component interact; therefore, the components are mutually combined to form the PC-ASA alloy material with a stable structure. The preparation method of the PC-ASA alloy material is simple, easily controlled, low in cost and suitable for industrial production.

Description

A kind of PC-ASA alloy material and preparation method thereof
Technical field
The present invention relates to the modified plastics field, particularly a kind of PC-ASA alloy material and preparation method thereof.
Background technology
The most basic requirements of outdoor goods such as air conditioner housing, grass-remover, fiber cable cross connection box are can support to be subjected to the weather of drastic change and abominable Working environment.It will have anti-condensation of moisture, waterproof and dustproof, insect-pest and the plague of rats, characteristics that the shock resistance damage capability is strong.Therefore, the casing outside requires higher to aspects such as waterproof, protection against the tide, dustproof, anticollision infringement, the insect-pest plagues of rats; Its inboard requires very high to control of temperature and humidity.Traditional metal cabinet, is eliminated in the poor performance aspect anti-condensation of moisture gradually due to it, becomes the trend place in this field to mould Dai Gangyi.
Polycarbonate (PC) resin height is heat-resisting, light stability is good, good stability of the dimension, and main drawback is difficult forming, and product prepared therefrom easily produces stress and ftractures.Therefore, usually and acrylonitrile-butadiene-styrene copolymer (ABS) resin alloy, not only can promote the toughness of PC material, improve processing characteristics, the PC-ABS alloy mechanical performance of making is good, and environmental stress cracking resistance is good, easily processing, but weathering resistance is relatively poor.Data shows, the rubber phase in ABS resin contains carbon-carbon double bond, and the ionic dissociation energy that its pair key faces a upper hydrogen is 163kJ-mol, is scaled wavelength below 700nm; And acrylonitrile-styrene-acrylic ester terpolymer (ASA) resin is due to carbon-carbon double bonds not, and on main chain, the ionic dissociation energy of hydrogen is 376kJ-mol, and namely wavelength is below 300nm.More than the energy of sun power substantially all is distributed in 290nm, be difficult to the ASA resin is played solarization, therefore be significantly increased than PC-ABS aspect weather-proof and ageing-resistant performance by its PC-ASA alloy of making, and keeping machinery, calorifics, electricity and the processing characteristics etc. of PC-ABS excellence.
Although existing PC-ABS alloy has advantage described above, also exist some as stronger in the internal stress of PC-ABS alloy, cause its toughness relatively poor, simultaneously also relatively poor etc. deficiency of its weathering resistance, ageing resistance.Along with the development of association area, PC-ABS Alloyapplication field is more and more wider, and the existing deficiency of PC-ABS alloy is restricting it and using and promote.Therefore, the deficiency described above of PC-ABS alloy is to continue a difficult problem to be improved.
Summary of the invention
The purpose of the embodiment of the present invention is to overcome the above-mentioned deficiency of prior art, provides that a kind of toughness is strong, constitutionally stable PC-ASA alloy material.
And, the preparation method of above-mentioned PC-ASA alloy material.
In order to realize the foregoing invention purpose, technical scheme of the present invention is as follows:
A kind of PC-ASA alloy material comprises the component of following parts by weight:
66.7 ~ 68.7 parts of polycarbonate, 10 parts of acrylonitrile-styrene-acrylic ester terpolymers, 5 ~ 7 parts of polydimethylsiloxane-polycarbonate block copolymers, 5 parts of acrylonitritrile-styrene resins;
Wherein, under 300 ℃ and 1.2Kg condition, described polycarbonate melt index M I is 3 ~ 15g/10min, and described polydimethylsiloxane-polycarbonate block copolymer melting index MI is 1 ~ 10g/10min.
And a kind of PC-ASA alloy material preparation method comprises the steps:
By above-mentioned PC-ASA alloy material formula, each component is mixed, form mixture;
With described mixture extruding pelletization, obtain described PC-ASA alloy material.
Above-mentioned PC-ASA alloy material is take polycarbonate and acrylonitrile-styrene-acrylic ester terpolymer as resin matrix, by adding polydimethylsiloxane-polycarbonate block copolymer, effectively reduce the internal stress of resin matrix, increased the toughness of PC-ASA alloy material; Acrylonitritrile-styrene resin makes effectively that each component is intermolecular has an effect, thereby makes each component interosculate, and forms constitutionally stable PC-ASA alloy material.This PC-ASA alloy material preparation method operation is simple, easily control, and cost is low, is fit to suitability for industrialized production.
Description of drawings
Fig. 1 is embodiment of the present invention PC-ASA alloy material preparation method's schematic flow sheet.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of toughness, weathering resistance, PC-ASA alloy material that ageing resistance is strong.This PC-ASA alloy material comprises the component of following parts by weight:
25 ~ 80 parts of polycarbonate (PC), 3 ~ 18 parts of acrylonitrile-styrene-acrylic ester terpolymers (ASA), 5 ~ 25 parts of organosilicon-polycarbonate block copolymers, 1 ~ 10 part of acrylonitritrile-styrene resin.
Above-mentioned PC-ASA alloy material is take polycarbonate and acrylonitrile-styrene-acrylic ester terpolymer as resin matrix, by adding organosilicon-polycarbonate block copolymer, effectively reduce the internal stress of resin matrix, increased the toughness of PC-ASA alloy material; Acrylonitritrile-styrene resin makes effectively that each component is intermolecular has an effect, thereby makes each component interosculate, and forms constitutionally stable PC-ASA alloy material.This PC-ASA alloy material preparation method operation is simple, easily control, and cost is low, is fit to suitability for industrialized production.
Particularly, (300 ℃ 1.2KG) are the polycarbonate of 3 ~ 15g/10min to above-mentioned polycarbonate preferred molten index M I.More preferably melting index MI (300 ℃ 1.2KG) are the polycarbonate of 4 ~ 8g/10min.The polycarbonate component of this preferred melt flow rate (MFR) scope can improve the toughness of PC-ASA alloy material effectively.This polycarbonate component is seen shown in following table 2 impact of PC-ASA alloy material toughness.
Aforesaid propylene nitrile-cinnamic acrylic ester terpolymer (ASA) can be this area ASA commonly used.As being the acrylonitrile-styrene-acrylic ester terpolymer by Korea S's brocade lake bright sun Plastics Company manufacturer product XC-180 by name.
Above-mentioned organosilicon-(300 ℃ of polycarbonate block copolymer preferred molten index M I, 1.2KG) be organosilicon-polycarbonate block copolymer of 1 ~ 10g/10min, more preferably melting index MI (300 ℃ 1.2KG) are organosilicon-polycarbonate block copolymer of 2 ~ 6g/10min.The organosilicon of this preferred melt flow rate (MFR) scope-polycarbonate block copolymer component can improve the shock strength of PC-ASA alloy material effectively, further improves PC-ASA alloy material toughness.Its impact on PC-ASA alloy material toughness is seen shown in following table 2.This organosilicon-polycarbonate block copolymer claims again polydimethylsiloxane-polycarbonate block copolymer, is by α, and the polydimethylsiloxane that two ends are the dihydroxyphenyl propane group is made in ω-dichloro-polydimethylsiloxane and dihydroxyphenyl propane condensation; Then, then add the dihydroxyphenyl propane photoreactive gas to carry out copolycondensation, obtain organosilicon-polycarbonate block copolymer.Contain polydimethylsiloxane and polycarbonate structure in its molecular chain, because of the introducing of dimethyl siloxane chain link, reduced softening temperature and the melting viscosity of pure polycarbonate (PC), improved impelling strength and pyrolysis temperature range.
(300 ℃ of aforesaid propylene nitrile-styrol copolymer (SAN) preferred molten index M I, 1.2KG) be 3 ~ 5g/10min acrylonitritrile-styrene resin, wherein, to be preferably vinyl cyanide segment content be 27 ~ 29% acrylonitritrile-styrene resin to acrylonitritrile-styrene resin.This acrylonitritrile-styrene resin component is used as compatilizer in the present invention, and the existence of this component makes that each component is intermolecular has an effect, thereby makes each component interosculate, and forms constitutionally stable PC-ASA alloy material.Wherein vinyl cyanide segment content is that this acrylonitritrile-styrene resin of 27 ~ 29% is conducive to more that each component is intermolecular has an effect, thereby makes each component interosculate more firmly with stable, thereby makes PC-ASA alloy material structure more stable.
Further, the embodiment of the present invention also can comprise the recipe ingredient of following parts by weight except the recipe ingredient that comprises above-mentioned parts by weight:
5 ~ 25 parts of fire retardants, stablizer, oxidation inhibitor are 0.1 ~ 3 part altogether, 0.1 ~ 3 part of UV light absorber.
Particularly, the existence of above-mentioned flame retardant compositions makes the PC-ASA alloy material possessing outside above-mentioned good characteristic, also has good flame retardant properties.Wherein, this fire retardant is preferably the Halogen phosphorus flame retardant.This fire retardant hangs down cigarette, low toxicity, environmental protection, makes PC-ASA alloy material safety, and low toxicity, environmental protection.Certainly, also can adopt other fire retardant of this area to substitute, as inorganic combustion inhibitor, halogenated flame retardant etc.
The existence of above-mentioned antioxidant component makes the PC-ASA alloy material possessing outside above-mentioned good characteristic, also has good antioxygen property, further strengthens the stability of PC-ASA alloy material.Wherein, this oxidation inhibitor preferably includes main anti-oxidant and auxiliary antioxidant, and the quality optimization of this main anti-oxidant and auxiliary antioxidant is 1:2.Wherein, main anti-oxidant is preferably β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid octadecanol ester, and its molecular weight is 530.86g/mol, trade(brand)name IRGANOX1076; Auxiliary antioxidant is preferably three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, and molecular weight is 646.9g/mol, trade(brand)name IRGANOX168, Ciba fine chemicals production.Like this, by primary antioxidant and auxiliary antioxidant and other component actings in conjunction, effectively improved the antioxidant property of PC-ASA alloy material.
The existence of above-mentioned UV light absorber component makes the PC-ASA alloy material possess outside above-mentioned good characteristic, has also further strengthened weathering resistance, the ageing resistance of alloy material.Wherein, this UV light absorber is preferably benzotriazole compound, as one or more of UV234, UV944, UV327.
The existence of stabilizer component is conducive to reduce PC-ASA alloy material surface tension force, prevents the effects such as light, thermolysis or oxygenolysis.Can be Pb stabilizer, as lead sulfate tribasic, dibasic lead stearate, or the metal soap stablizer, as Zinic stearas (ZnSt), lead stearate (PbSt) etc., certainly, can use the stablizer of the other types of this area to substitute.
Certainly, embodiment of the present invention PC-ASA alloy material can also according to concrete needs, can also comprise other auxiliary agent.As one or more in processing aid, releasing agent, tinting material.
The present invention also provides above-mentioned PC-ASA alloy material preparation method, and its technical process as shown in Figure 1.The method comprises the steps:
S1: by above-mentioned PC-ASA alloy material formula, each component is mixed, form mixture;
S2: with the mixture extruding pelletization, obtain described PC-ASA alloy material.
Above-mentioned PC-ASA alloy material preparation method is mixed in proportion each component, processes to obtain product through extruding pelletization.Operation is simple, easily control, and cost is low, is fit to suitability for industrialized production.
Particularly, in above-mentioned PC-ASA alloy material preparation method S1 step, by formula, each component is mixed, hybrid mode can be put into mixing machine with each component and fully mixes, and mixing time is preferably 20~30min, makes each component mix.
In above-mentioned PC-ASA alloy material preparation method S2 step, the mixture extruding pelletization preferably adopts the twin screw extruder extruding pelletization, is CTE-35(L/D=48 as the model of producing by Nanjing Ke Ya company) twin screw extruder.In the formula about the PC-ASA alloy material in the S1 step, comprise organosilicon-polycarbonate block copolymer, contain the dimethylsilane chain link in this multipolymer, effectively reduce softening temperature and the melting viscosity of PC component, thereby effectively reduce PC-ASA alloy material extrusion temperature.In extruding pelletization, mixture is preferably respectively 140 ~ 160 ℃, a district at the spout of this twin screw extruder to the temperature of each section of die head, two 190 ~ 210 ℃, districts, three 190 ~ 210 ℃, districts, four 210 ~ 230 ℃, districts, five 210 ~ 230 ℃, districts, six 220 ~ 240 ℃, districts, seven 220 ~ 240 ℃, districts, eight 210 ~ 230 ℃, districts, 230 ~ 240 ℃ of heads, the rotating speed of described double-screw extruder screw are 250 ~ 300 rev/mins.Under this preferred processing condition, can make between each component to interact, thus the PC-ASA alloy material of formation stable performance.
Now take the formula of concrete PC-ASA alloy material and preparation method as example, the present invention is further elaborated.
Embodiment 1
The formula of PC-ASA alloy material sees Table 1.Wherein, PC is the common PC powder of MI:9 ~ 12g/10min, ASA is Korea S's brocade lake bright sun Plastics Company manufacturer product XC-180 by name, the MI of organosilicon-polycarbonate block copolymer is: 2 ~ 6g/10min, oxidation inhibitor is the β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid octadecanol ester of 0.1 part and three (2,4-di-tert-butyl-phenyl) phosphorous acid ester of 0.2 part, stablizer is ZnSt, and UV light absorber is UV944.
Its preparation method is as follows:
S11. the formula of pressing in table 1 mixes each component, forms uniform mixture;
S12. with the spout feeding of mixture from screw extrusion press, adopt the screw extrusion press extruding pelletization, obtain described PC-ASA alloy material, mixture is preferably respectively 140 ℃, a district at the spout of this twin screw extruder to the temperature of each section of die head, two 190 ℃, districts, three 190 ℃, districts, four 230 ℃, districts, five 230 ℃, districts, six 240 ℃, districts, seven 240 ℃, districts, eight 230 ℃, districts, 240 ℃ of heads, the rotating speed of described double-screw extruder screw are 250 rev/mins.
Embodiment 2
The formula of PC-ASA alloy material sees Table 1.Wherein, ASA is Korea S's brocade lake bright sun Plastics Company manufacturer product XC-180 by name, oxidation inhibitor is the β-(3 of 0.1 part, the 5-di-tert-butyl-hydroxy phenyl) three (2 of propionic acid octadecanol ester and 0.2 part, the 4-di-tert-butyl-phenyl) phosphorous acid ester, stablizer is ZnSt, and UV light absorber is UV944.
Its preparation method such as embodiment 1.
Embodiment 1 to embodiment 8 sees Table 1, and the correlated performance by the PC-ASA alloy material of embodiment 1 ~ 8 preparation sees Table 2 accordingly.
Embodiment 9
The component of the parts by weight of PC-ASA alloy material is: MI is 25 parts of the polycarbonate (PC) of 4 ~ 8g/10min, 3 parts of acrylonitrile-styrene-acrylic ester terpolymers (ASA), 25 parts of organosilicon-polycarbonate block copolymers, 10 parts of acrylonitritrile-styrene resins.
Its preparation method is as follows:
S11. by above-mentioned formula, each component is mixed, form uniform mixture;
S12. with the spout feeding of mixture from screw extrusion press, adopt the screw extrusion press extruding pelletization, obtain described PC-ASA alloy material, in, mixture is preferably respectively 160 ℃, a district, two 210 ℃, districts at the spout of this twin screw extruder to the temperature of each section of die head, three 210 ℃, districts, four 210 ℃, districts, five 210 ℃, districts, six 220 ℃, districts, seven 220 ℃, districts, eight 210 ℃, districts, 230 ℃ of heads, the rotating speed of described double-screw extruder screw are 250 ~ 300 rev/mins.The PC-ASA alloy material performance of PC-ASA alloy material performance similar embodiment 4 preparations of these embodiment 9 preparations.
Embodiment 10
The component of the parts by weight of PC-ASA alloy material is: MI is 80 parts of the carbonic ethers (PC) of 4 ~ 8g/10min, 18 parts of acrylonitrile-styrene-acrylic ester terpolymers (ASA), 5 parts of organosilicon-polycarbonate block copolymers, 1 part of acrylonitritrile-styrene resin.
Its preparation method is as follows:
S11. by above-mentioned formula, each component is mixed, form uniform mixture;
One 140 ~ 160 ℃, district, two 190 ~ 210 ℃, districts, three 190 ~ 210 ℃, districts, four 210 ~ 230 ℃, districts, five 210 ~ 230 ℃, districts, six 220 ~ 240 ℃, districts, seven 220 ~ 240 ℃, districts, eight 210 ~ 230 ℃, districts, 230 ~ 240 ℃ of heads, the rotating speed of described double-screw extruder screw are 250 ~ 300 rev/mins
S12. with the spout feeding of mixture from screw extrusion press, adopt the screw extrusion press extruding pelletization, obtain described PC-ASA alloy material, mixture is preferably respectively 150 ℃, a district at the spout of this twin screw extruder to the temperature of each section of die head, two 200 ℃, districts, three 200 ℃, districts, four 220 ℃, districts, five 220 ℃, districts, six 230 ℃, districts, seven 230 ℃, districts, eight 220 ℃, districts, 235 ℃ of heads, the rotating speed of described double-screw extruder screw are 280 rev/mins.The PC-ASA alloy material performance of PC-ASA alloy material performance similar embodiment 4 preparations of these embodiment 10 preparations.
The formula of table 1 embodiment 1 to embodiment 8
Figure GDA00001791244200081
The formula correlated performance of table 2 embodiment 1 ~ 8
By upper table 1 and table 2 as can be known, when the Halogen phosphorus flame retardant that uses reach 10 parts and more than, PC-ASA alloy material flame retardant properties can reach the V-0 rank.Above-mentioned 8 formulas, optimum with the alloy material over-all properties that the formula of embodiment 4 is prepared.In the situation that keep oxidation inhibitor, stablizer, UV light absorber and other processing aid adding proportion certain, the toughness of material depends primarily on MI value and the adding proportion of common PC powder, organosilicon-polycarbonate block copolymer.Comparative example 4 draws with embodiment 5, embodiment 6 experimental results, in the situation that common PC powder MI value is certain, selection is than low melt index (organosilicon-polycarbonate block copolymer of 2 ~ 6g/10min), and when reaching certain addition (approximately 7 parts or more than), can give PC-ASA alloy material impact property preferably; Simultaneously, comparative example 4, embodiment 5, embodiment 6 and embodiment 1, embodiment 2, embodiment 3 experimental results discoveries, common PC powder is because the difference of viscosity also will directly have influence on the toughness of alloy material; The impact property of PC-ASA alloy under the high and low temperature condition further guaranteed in the use of ASA resin.Do not contain organosilicon-Copolycarbonate in embodiment 8 experiment, by with the contrast of embodiment 1 to embodiment 7 experiment, the toughness indexs such as its impact property obviously descend.This phenomenon further illustrates: a large amount of silicon that organosilicon-Copolycarbonate produces after using-oxygen key can improve the impelling strength of material, makes the PC-ASA alloy more full of elasticity and become tough and tensile.
For most of engineering plastics, shock strength is that during weathering test detects, variation is maximum, decline is the most obvious.Therefore, the PC-ASA alloy material that relates to of the embodiment of the present invention selects shock strength as test index heat-resisting, ageing-resistant performance.PC-ASA alloy material exemplar is placed on place in the baking oven of 90 ℃ and carries out the socle girder test with notched test piece after 2000 hours and find, when the ASA addition reaches 10 parts and when above, because the mechanical properties decrease that thermal ageing causes is slower, and meet the requirement of material mechanical performance conservation rate 〉=85% after the artificial acceleration anti-aging test, it ascribes the ASA resin to for heat-resisting, the ageing-resistant performance role of alloy material.
Weathering resistance aspect, the embodiment of the present invention are mainly to observe the variation of material color by the fluorescent ultraviolet lamp irradiation experiment of 10 circulations (240 hours).By experimental result as can be known, aberration △ E is relevant to the content of ASA resin.In ultraviolet (UV) aging test, in embodiment 1 to embodiment 6 formula, the ASA addition of 10 parts makes alloy material colour-change Δ E<1, during especially embodiment 4 fills a prescription, and aberration △ E ≈ 0.5, material possesses stronger ultra-violet radiation resisting ability.
In the related PC-ASA alloy preparation process of the embodiment of the present invention, select the components such as appropriate PC powder, ASA resin, organosilicon-polycarbonate block copolymer, fire retardant, make the PC-ASA alloy material possess good toughness, ageing-resistant, weather-proof and flame retardant properties.Therefore, this PC-ASA alloy material is widely used in the optical cable for communication cross-connecting box, air conditioner housing, the outdoor goods such as grass-remover, automobile external spare.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. PC-ASA alloy material comprises the recipe ingredient of following parts by weight:
66.7 ~ 68.7 parts of polycarbonate, 10 parts of acrylonitrile-styrene-acrylic ester terpolymers, 5 ~ 7 parts of polydimethylsiloxane-polycarbonate block copolymers, 5 parts of acrylonitritrile-styrene resins;
Wherein, under 300 ℃ and 1.2Kg condition, described polycarbonate melt index M I is 4 ~ 8g/10min, and described polydimethylsiloxane-polycarbonate block copolymer melting index MI is 2 ~ 6g/10min.
2. PC-ASA alloy material according to claim 1 is characterized in that: under 300 ℃ and 1.2Kg condition, described acrylonitritrile-styrene resin melting index MI is 3 ~ 5g/10min; Vinyl cyanide segment content in described acrylonitritrile-styrene resin is 27 ~ 29wt%.
3. PC-ASA alloy material according to claim 1 is characterized in that: the recipe ingredient that also comprises following parts by weight:
5 ~ 25 parts of fire retardants, stablizer, oxidation inhibitor are 0.1 ~ 3 part altogether, 0.1 ~ 3 part of UV light absorber.
4. PC-ASA alloy material according to claim 3, it is characterized in that: described fire retardant is the Halogen phosphorus flame retardant; Described oxidation inhibitor comprises main anti-oxidant and auxiliary antioxidant.
5. a PC-ASA alloy material preparation method, comprise the steps:
By the arbitrary described PC-ASA alloy material formula of claim 1 ~ 4, each component is mixed, form mixture;
With described mixture extruding pelletization, obtain described PC-ASA alloy material.
6. PC-ASA alloy material preparation method according to claim 5, it is characterized in that: described mixture extruding pelletization is to adopt the twin screw extruder extruding pelletization, described mixture is respectively in the spout of the described twin screw extruder temperature to each section of die head: 140 ~ 160 ℃, a district, two 190 ~ 210 ℃, districts, three 190 ~ 210 ℃, districts, four 210 ~ 230 ℃, districts, five 210 ~ 230 ℃, districts, six 220 ~ 240 ℃, districts, seven 220 ~ 240 ℃, districts, eight 210 ~ 230 ℃, districts, 230 ~ 240 ℃ of heads, the rotating speed of described double-screw extruder screw are 250 ~ 300 rev/mins.
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