CN102952336B - Active basic magnesium sulfate whisker modified polypropylene composite material and preparation method thereof - Google Patents
Active basic magnesium sulfate whisker modified polypropylene composite material and preparation method thereof Download PDFInfo
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- CN102952336B CN102952336B CN201210458159.9A CN201210458159A CN102952336B CN 102952336 B CN102952336 B CN 102952336B CN 201210458159 A CN201210458159 A CN 201210458159A CN 102952336 B CN102952336 B CN 102952336B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion 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
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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Abstract
The invention discloses an active basic magnesium sulfate whisker modified polypropylene composite material and a preparation method thereof. The composite material consists of polypropylene, basic magnesium sulfate whiskers, a flexibilizer, a processing agent, a coupling agent, acid dilution and a heat stabilizer. An engineering part made of the composite material disclosed by the invention is developed towards the lightweight; the composite material is beneficial to the reduction of the use quantity of the material and the reduction of the use cost of the material; and moreover, the product is green and environmental-friendly and is suitable to prepare automobile interior parts.
Description
Technical field
The invention belongs to technical field of polymer composite materials, be specifically related to a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material and preparation method thereof.
Technical background
Polypropylene is a kind of general plastics, but at the inner and outer decorative parts of fabrication parts as automobile, because its intensity, rigidity and resistance toheat can not meet the requirement of parts, polyacrylic impact property is poor simultaneously, particularly cold temperature impact is poor, and its molding shrinkage is large, these shortcomings limit the application & development of polypropylene in engineering part.So the material preparing inner and outer decorative parts of automobile at present is mainly made by adding conventional breeze filled modified polypropylene, its product has good, the easy machine-shaping of size, the advantage such as cheap.But along with the lightweight cry of automobile is in recent years more and more higher, high, the low density modified plastics of over-all properties more and more comes into one's own.Wherein whisker be exactly a kind of good combination property, can replace conventional breeze even fiber to meet the requirement of inner and outer decorative parts of automobile material.
Whisker refers under manual control condition with a kind of staple fibre that high purity single crystal form grows into, its diameter very little (micron number magnitude), not containing the defect (crystal boundary, dislocation, hole etc.) existed in usual material, its atomic arrangement high-sequential, thus its intensity is close to the theoretical value of perfect crystal.Its height-oriented structure not only makes it have high strength, high-modulus and high elongation rate, but also has electricity, light, magnetic, dielectric, conduction, superconduction character.The intensity of whisker is far above other chopped strands, and the main reinforcement being used as matrix material, for the manufacture of high strength composite.The kind of whisker is a lot, such as silicon carbide whisker, aluminium borate whisker, potassium titanate crystal whisker, calcium carbonate crystal whisker, alkali magnesium sulfate crystal whisker, ZnOw, calcium sulfate crystal whiskers and silicon-calcium-magnesium whisker etc.
Integrated comparative, the performance of alkali magnesium sulfate crystal whisker is best in all whiskers, be mainly manifested in the features such as strength modulus is high, density is low, as the strengthening and toughening agent of the matrix materials such as plastics, rubber and resin, flexural strength and the resistance to impact shock of body material can be improved.In addition, its coefficient of expansion is close with plastics, good with the consistency of plastics.Also have nontoxic, thermal value is little, the characteristic such as fire-retardant.After alkali magnesium sulfate crystal whisker and plastics, rubber make matrix material, not only there is good strengthening and toughening effect, and outward appearance is good, excellent rigidity, shock resistance is strong, and volumetric shrinkage is extremely low, dimensional precision is high, and heat resistanceheat resistant performance is good, also can give the flame retardant properties of matrix material.
Summary of the invention
The present invention is directed to problems of the prior art, the Active basic magnesium magnesium sulfate crystal whisker that a kind of high strength, high-modulus, low density, low-shrinkage, machine-shaping property are good and comprehensive mechanical property is excellent modified polypropylene composite material is provided.Another object of the present invention is to provide the preparation method of above-mentioned Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material.
In order to achieve the above object, the present invention is realized by following technical proposal:
A kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material, the weight part of its constitutive material is:
Polypropylene: 50-88 part;
Alkali magnesium sulfate crystal whisker: 10-40 part;
Toughner: 2-10 part;
Processing aid: 0.1-1 part;
Coupling agent: 0.3-0.5 part;
Acid dilution: 0.3-0.5;
Thermo-stabilizer: 0.1-1 part.
Described polypropylene is at least one in homopolymerization polypropylene, Co-polypropylene, and its melting index is 10-25g/10min.
The length-to-diameter ratio of described alkali magnesium sulfate crystal whisker is 10-30, particle diameter is 0.5-4um.
Described toughner is vinyl elastomerics or styrenic elastomer, and the present invention preferentially selects polyethylene (PE), ethylene-octene copolymer (POE), ethylene-propylene-diene terpolymer (EPDM).
Described processing aid is calcium stearate (Ca-St
2), at least one in ethylene bis stearamide (EBS), modification ethylene bis stearamide (TAF).
Described coupling agent is a kind of for being selected from silicane KH550, KH560, KH570, or a kind of in titanate ester NDZ-101, NDZ-40.
Described sour dilution is the aqueous solution that in hydrochloric acid, sulfuric acid, phosphoric acid, at least one and water configure, and the volume percent of described sour dilution is 0.5-2%.
Described thermo-stabilizer is selected from 2,6-tri-grades of butyl-4-methylphenols, two (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3,5-tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester (1010), three (2,4-di-tert-butyl-phenyl) phosphorous acid ester (168) of phosphorous acid lipid, three monooctyl esters, three the last of the ten Heavenly stems ester, three (Lauryl Alcohol) ester, three (16 carbon alcohol) ester, naphthylamines, pentanoic, at least one in Ursol D.
Prepare the method for above-mentioned a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material, comprise the following steps:
(1) Active basic magnesium magnesium sulfate crystal whisker pre-composition is prepared:
By weight part in formula, alkali magnesium sulfate crystal whisker, coupling agent, processing aid are put into high mixer, by high pressure sprays fog equipment sour dilution is evenly sprayed onto in the mixture in high mixer simultaneously, then carry out high-speed mixing, obtain Active basic magnesium magnesium sulfate crystal whisker pre-composition;
(2) preparation of matrix material:
After in formula, polypropylene, toughner and thermo-stabilizer mix by weight ratio, be carry out melting, mixing, dispersion in the twin screw extruder of 35-50:1 in length-to-diameter ratio, the Active basic magnesium magnesium sulfate crystal whisker pre-composition (1) prepared again adds from the side feeding of twin screw extruder, plastify at 190-220 DEG C of temperature, again by double-screw extruding pelletizing, just obtain Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material.
The preferred version of such scheme is, the temperature of described step (1) high speed mixing is 100-120 DEG C, the time is 5-10min.
The present invention compared with prior art, has some advantage following:
1, alkali magnesium sulfate crystal whisker Reinforced Polypropylene of the present invention is prepared in polypropylene composite material because alkali magnesium sulfate crystal whisker has lower density, so be conducive to final engineering part, it develops to lightweight, and be conducive to the usage quantity reducing its material, reduce the use cost of material.
2, the alkali magnesium sulfate crystal whisker material of the present invention's use, with preparing salt by working up seawater by product bittern for raw material, has the advantage such as wide material sources, environmental protection, has very large meaning to the energy-conserving and environment-protective that current national is advocated.
3, the alkali magnesium sulfate crystal whisker material that uses of the present invention, because of its have enhancings, fire-retardant, but the function such as cigarette, filling and be widely used in modifying plastics material, make general-purpose plastics to through engineering approaches future development, increase substantially use range and the degree of depth.
4, the alkali magnesium sulfate crystal whisker material of the present invention's use, has particle diameter little, is easy to dispersion in process of manufacture, less to the degree of wear of machine, effectively raises the work-ing life of twin-screw extrusion machine.
5, the present invention carries out surface activation process by silane coupling agent to alkali magnesium sulfate crystal whisker, enhance the consistency of alkali magnesium sulfate crystal whisker and acrylic resin, directly fill with existing breeze, fiber etc. and compare, be conducive to improving alkali magnesium sulfate crystal whisker dispersed degree in the base.
embodiment:
Provide embodiment below to be specifically described the present invention; what be necessary to herein means out is that following examples are only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that the person skilled in the art in this field makes the present invention according to content of the present invention and adjustment still belong to protection scope of the present invention.
In the embodiment of the present invention, all constitutive materials are existing commercially available prod, all components all with parts by weight, wherein:
Alkali magnesium sulfate crystal whisker be with preparing salt by working up seawater by product bittern for raw material obtain that length-to-diameter ratio is 10-30, particle diameter is for 0.5-4um.
Toughner is vinyl elastomerics or styrenic elastomer, and the present invention preferentially selects polyethylene (PE), ethylene-octene copolymer (POE), ethylene-propylene-diene terpolymer (EPDM).
Thermo-stabilizer is selected from least one in Hinered phenols, hindered amines, phosphorous acid esters, wherein Hinered phenols thermo-stabilizer has 2,6-tri-grades of butyl-4-methylphenols, two (3,5-tri-grades of butyl-4-hydroxy phenyls) thioether or four (β-(3,5-, tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester (1010) etc.; Phosphite type thermal stabilizing agent have three (2,4-di-tert-butyl-phenyl) phosphorous acid ester (168), three monooctyl esters, three the last of the ten Heavenly stems ester, three (Lauryl Alcohol) ester, three (16 carbon alcohol) ester; Hindered amines thermo-stabilizer has naphthylamines, pentanoic, Ursol D etc.
Coupling agent be silane coupling agent as KH550, KH560, KH570, or the one in titante coupling agent NDZ-101, NDZ-401.The preferred Silane coupling agent KH550 of the present invention, KH560, KH570 model.
Processing aid is selected from least one in low molecular hydrocarbon, metal soap, stearic acid complex ester class and amides processing aid.The present invention preferentially selects calcium stearate (Ca-St
2), ethylene bis stearamide (EBS), modification ethylene bis stearamide (TAF).
Acid dilution is the aqueous solution that in hydrochloric acid, sulfuric acid, phosphoric acid, at least one and water configure, and the volume percent of described sour dilution is 0.5-2%.Volume percent is selected to be 1% hydrochloric acid soln, 0.5% sulphuric acid soln, 1.5% phosphoric acid solution in embodiment, or the mixture of 0.5% sulphuric acid soln and 0.5% hydrochloric acid soln.
In the present invention, the preparation of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material adopts following method:
The first step first need prepare Active basic magnesium magnesium sulfate crystal whisker pre-composition:
By weight part in formula, alkali magnesium sulfate crystal whisker, coupling agent, processing aid are put into high mixer, by high pressure sprays fog equipment sour dilution is evenly sprayed onto in the mixture in high mixer simultaneously, then carry out high-speed mixing 5-10min, temperature is 100-120 DEG C, obtain Active basic magnesium magnesium sulfate crystal whisker pre-composition;
Second step is the preparation of matrix material:
After in formula, polypropylene, toughner and thermo-stabilizer mix by weight ratio, be carry out melting, mixing, dispersion in the twin screw extruder of 35-50:1 in length-to-diameter ratio, the Active basic magnesium magnesium sulfate crystal whisker pre-composition (1) prepared again adds from the side feeding of twin screw extruder, plastify at 190-220 DEG C of temperature, again by double-screw extruding pelletizing, just obtain Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material.
one, embodiment
Specific embodiment 1-4 below adopts above-mentioned preparation method to be prepared Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material, and above-mentioned preferred kind also selected by its raw material.
Embodiment 1:
Co-polypropylene: 48 parts
Homo-polypropylene: 40 parts
Toughner POE:10 part
Processing aid TAF:0.7 part
Processing aid CaSt
2: 0.4 part
Silane coupling agent KH550: 0.3 part
Hydrochloric acid soln: 0.5 part
Thermo-stabilizer 1010:0.2 part
Thermo-stabilizer 168:0.2 part
Alkali magnesium sulfate crystal whisker: 10 parts
The present embodiment adopts length-to-diameter ratio to be 35:1 twin screw extruder, polypropylene, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, again Active basic magnesium magnesium sulfate crystal whisker pre-composition is added from its side feeding, at 190-220 DEG C of temperature, carry out plasticizing extruding pelletization namely obtain product.
Embodiment 2:
Co-polypropylene: 42 parts
Homo-polypropylene: 28 parts
Toughner PE:8 part
Processing aid TAF:0.3 part
Processing aid EBS:0.4 part
Silane coupling agent KH560:0.4 part
Sulphuric acid soln: 0.4 part
Thermo-stabilizer 1010:0.3 part
2,6-, tri-grades of butyl-4-methylphenols: 0.3 part
Alkali magnesium sulfate crystal whisker: 20 parts
The present embodiment adopts length-to-diameter ratio to be 40:1 twin screw extruder, polypropylene, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, again Active basic magnesium magnesium sulfate crystal whisker pre-composition is added from its side feeding, at 190-220 DEG C of temperature, carry out plasticizing extruding pelletization namely obtain product.
Embodiment 3:
Co-polypropylene: 36 parts
Homo-polypropylene: 24 parts
Toughner POE:5 part
Processing aid TAF:0.1 part
Processing aid CaSt
2: 0.2 part
Silane coupling agent KH570:0.5 part
Phosphoric acid solution: 0.3 part
Two (3,5-, tri-grades of butyl-4-hydroxy phenyls) thioether: 0.5 part
Thermo-stabilizer 168:0.5 part
Alkali magnesium sulfate crystal whisker: 30 parts
The present embodiment adopts length-to-diameter ratio to be 50:1 twin screw extruder, polypropylene, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, again Active basic magnesium magnesium sulfate crystal whisker pre-composition is added from its side feeding, at 190-220 DEG C of temperature, carry out plasticizing extruding pelletization namely obtain product.
Embodiment 4:
Co-polypropylene: 30 parts
Homo-polypropylene: 20 parts
Toughner EPDM:2 part
Processing aid EBS:0.1 part
Titante coupling agent NDZ-101:0.5 part
The mixing solutions of hydrochloric acid and sulfuric acid: 0.5 part
Three monooctyl esters: 0.1 part
Alkali magnesium sulfate crystal whisker: 40 parts
The present embodiment adopts length-to-diameter ratio to be 36:1 twin screw extruder, polypropylene, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, again Active basic magnesium magnesium sulfate crystal whisker pre-composition is added from its side feeding, at 190-220 DEG C of temperature, carry out plasticizing extruding pelletization namely obtain product.
two, comparative example
Because the existing material for the preparation of inner and outer decorative parts of automobile is mainly made as calcium carbonate, talcum powder etc. carry out filled modified polypropylene by adding conventional breeze.In order to embody advantage of the present invention better, conventionally formula composition and preparation method thereof prepares contrast product, its raw material composition is prepared with reference to the component provided in the present invention, and its preparation method, also with preparation method of the present invention, through mixing, granulation, is extruded into product.Concrete comparative example is as follows:
Comparative example 1:
Co-polypropylene: 36 parts
Homo-polypropylene: 24 parts
Toughner POE:10 part
Processing aid TAF:0.3 part
Processing aid CaSt
2: 0.4 part
Thermo-stabilizer 1010:0.2 part
Thermo-stabilizer 168:0.2 part
Talcum powder ends extra large PT10:30 weight part
The present embodiment adopts length-to-diameter ratio to be 36:1 twin screw extruder, polypropylene, processing aid, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, the extra large PT10 that ended by talcum powder again adds from its side feeding, carries out plasticizing extruding pelletization and namely obtain product at 190-220 DEG C of temperature.
Comparative example 2:
Co-polypropylene: 36 weight parts
Homo-polypropylene: 24 weight parts
Toughner POE:10 weight part
Processing aid TAF:0.3 weight part
Processing aid CaSt
2: 0.4 weight part
Thermo-stabilizer 1010:0.2 weight part
Thermo-stabilizer 168:0.2 weight part
The big Xiang BX-1:30 weight part of calcium carbonate
The present embodiment adopts length-to-diameter ratio to be 36:1 twin screw extruder, polypropylene, processing aid, toughner and thermo-stabilizer are carried out melting, mixing, dispersion in this forcing machine, again big for calcium carbonate Xiang BX-1 is added from its side feeding, at 190-220 DEG C of temperature, carry out plasticizing extruding pelletization namely obtain product.
three, simultaneous test test
Characterize according to GB after sample obtained in above-described embodiment 1-4 and comparative example 1-2 is injection molded into standard batten according to unified technique and test, its concrete physical index is as shown in following table 1,2:
Table 1: the main physical index of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material
| Project | Testing standard | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Alkali magnesium sulfate crystal whisker | / | 10 | 20 | 30 | 40 |
| Melt flow rate (MFR) g/10min | GB/T3682 | 13 | 18 | 19 | 21 |
| Shrinking percentage % | GB/T15585 | 1.4-1.6 | 1.2-1.4 | 1.1-1.3 | 0.5-0.7 |
| Density g/cm 3 | GB/T1033 | 0.96 | 1.01 | 1.05 | 1.17 |
| Tensile strength MPa | GB/T1040 | 24 | 24 | 24 | 25 |
| Flexural strength MPa | GB/T9341 | 33 | 34 | 36 | 38 |
| Modulus in flexure MPa | GB/T9341 | 1508 | 2090 | 2869 | 2998 |
| Notch shock KJ/m 2 | GB/T1843 | 9.1 | 12.5 | 15.2 | 10.3 |
| Heat-drawn wire DEG C (0.45Mpa) | GB/T16342 | 104 | 110 | 115 | 125 |
Data as can be seen from table 1, along with alkali magnesium sulfate crystal whisker adding proportion increases, the mobility of matrix material, flexural strength, modulus in flexure and heat-drawn wire all increase, and the shock strength of embodiment 3 is maximum.
Table 2: embodiment 3 and comparative example physical property contrast table
| Project | Testing standard | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| Melt flow rate (MFR) g/10min | GB/T3682 | 19 | 12 | 16 |
| Shrinking percentage % | GB/T15585 | 1.1-1.3 | 1.5-1.7 | 1.8-2.0 |
| Density g/cm 3 | GB/T1033 | 1.05 | 1.14 | 1.13 |
| Tensile strength MPa | GB/T1040 | 24 | 18 | 20 |
| Flexural strength MPa | GB/T9341 | 36 | 28 | 24 |
| Modulus in flexure MPa | GB/T9341 | 2869 | 2500 | 2200 |
| Notch shock KJ/m 2 | GB/T1843 | 15.2 | 8.2 | 10.3 |
| Heat-drawn wire DEG C (0.45Mpa) | GB/T16342 | 115 | 105 | 100 |
Data as can be seen from table 2, in modified polypropylene composite material, alkali magnesium sulfate crystal whisker is compared with the mineral filler such as talcum powder, calcium carbonate, the shock strength of alkali magnesium sulfate reinforced polypropylene compound material is maximum, density is low, shrinking percentage is little, and tensile strength, flexural strength, heat-drawn wire and flowing property are all better than existing breeze filling strongthener, therefore, alkali magnesium sulfate crystal whisker, as a kind of novel strongthener, has the value of actual development.
Claims (8)
1. an Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material, is characterized in that: the weight part of its constitutive material is:
Polypropylene: 50-88 part;
Alkali magnesium sulfate crystal whisker: 10-40 part;
Toughner: 2-10 part;
Processing aid: 0.1-1 part;
Coupling agent: 0.3-0.5 part;
Acid dilution: 0.3-0.5;
Thermo-stabilizer: 0.1-1 part;
Described sour dilution is the aqueous solution that in hydrochloric acid, sulfuric acid, phosphoric acid, at least one and water configure, and the volume percent of described sour dilution is 0.5-2%;
Described Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material preparation process is as follows:
(1) Active basic magnesium magnesium sulfate crystal whisker pre-composition is prepared:
By weight part in formula, alkali magnesium sulfate crystal whisker, coupling agent, processing aid are put into high mixer, by high pressure sprays fog equipment sour dilution is evenly sprayed onto in the mixture in high mixer simultaneously, then carry out high-speed mixing, obtain Active basic magnesium magnesium sulfate crystal whisker pre-composition;
(2) preparation of matrix material:
After in formula, polypropylene, toughner and thermo-stabilizer mix by weight ratio, be carry out melting, mixing, dispersion in the twin screw extruder of 35-50:1 in length-to-diameter ratio, the Active basic magnesium magnesium sulfate crystal whisker pre-composition (1) prepared again adds from the side feeding of twin screw extruder, plastify at 190-220 DEG C of temperature, again by double-screw extruding pelletizing, just obtain Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material.
2. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, it is characterized in that: described polypropylene is at least one in homo-polypropylene, Co-polypropylene, its melting index is 10-25g/10min.
3. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, is characterized in that: the length-to-diameter ratio of described alkali magnesium sulfate crystal whisker is 10-30, particle diameter is 0.5-4um.
4. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, is characterized in that: described toughner is vinyl elastomerics or styrenic elastomer.
5. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, is characterized in that: described processing aid is calcium stearate (Ca-St
2), at least one in ethylene bis stearamide (EBS), modification ethylene bis stearamide (TAF).
6. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, is characterized in that: described coupling agent is a kind of for being selected from silicane KH550, KH560, KH570, or a kind of in titanate ester NDZ-101, NDZ-40.
7. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, it is characterized in that: described thermo-stabilizer is selected from 2, 6-tri-grades of butyl-4-methylphenols, two (3, 5-tri-grades of butyl-4-hydroxy phenyls) thioether, four (β-(3, 5-tri-grades of butyl-4-hydroxy phenyls) propionic acid) pentaerythritol ester (1010), three (2 of phosphorous acid lipid, 4-di-tert-butyl-phenyl) phosphorous acid ester (168), three monooctyl esters, three the last of the ten Heavenly stems ester, three (Lauryl Alcohol) ester, three (16 carbon alcohol) ester, naphthylamines, pentanoic, at least one in Ursol D.
8. a kind of Active basic magnesium magnesium sulfate crystal whisker modified polypropylene composite material according to claim 1, is characterized in that: the temperature of described high-speed mixing is 100-120 DEG C, the time is 5-10min.
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| CN101250303A (en) * | 2008-03-20 | 2008-08-27 | 江南模塑科技股份有限公司 | Mineral/whisker reinforced polypropylene composite material having good spraying property |
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