CN103030886A - Transparent polypropylene and preparing method thereof - Google Patents
Transparent polypropylene and preparing method thereof Download PDFInfo
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- CN103030886A CN103030886A CN2012105599227A CN201210559922A CN103030886A CN 103030886 A CN103030886 A CN 103030886A CN 2012105599227 A CN2012105599227 A CN 2012105599227A CN 201210559922 A CN201210559922 A CN 201210559922A CN 103030886 A CN103030886 A CN 103030886A
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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
- B29C48/92—Measuring, controlling or regulating
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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
- 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
Abstract
The invention relates to transparent polypropylene, which is prepared from the following raw materials by weight part: 100 parts of polypropylene, 0.1-0.4 parts of nucleating agent, 0.1-0.2 parts of antioxidant, 0.05-0.2 parts of acid-acceptor, 0.05-0.1 parts of lubricant and 0.05-0.15 parts of dispersant, wherein the nucleating agent is prepared by compounding a phosphate transparent agent with a sorbitol transparent agent, and the weight ratio of the phosphate transparent agent to the sorbitol transparent agent is 0.1 to 100. The preparation method of the transparent polypropylene comprises the following steps: premixing the nucleating agent, the antioxidant, the acid-acceptor, the lubricant and the dispersant, and then extruding the premixed material and the polypropylene at the temperature of 160-240 DEG C to be pelletized.
Description
Technical field
The invention relates to a kind of transparent polypropylene and preparation method thereof, particularly a kind of preparation method with glucitols and the composite preparation transparent polypropylene of organic phosphate transparent base.
Background technology
Polypropylene is a class excellent property, low price, of many uses, translucent crystalline plastics, can improve the polyacrylic transparency by adding nucleator, obtains the transparent polypropylene plastics.In order to reach the better transparency, existing transparent polypropylene plastics, major part selects atactic copolymerized polypropene as base resin, adds the glucitols transparent base, but because the rigidity of atactic copolymerized polypropene is poor than homo-polypropylene, although and glucitols transparent base antireflective effect is better, but it is limited to increase firm effect, and often rigidity is relatively poor to cause existing transparent polypropylene, and heat-drawn wire is lower, during for the production of the beverage bottle of some hot fillings, a swollen bottle phenomenon easily appears.Organophosphate is the novel nucleator that is widely used in recent years in the high crystalline polyolefin prescription, compares with the glucitols transparent base, and its effect that improves rigidity, surface hardness and heat-drawn wire is large.When being used for polypropylene, the goods transparency, rigidity, crystallization velocity and heat-drawn wire have a more substantial increase.The organophosphate Good Heat-resistance is not decomposed in moulding process in addition, does not have smell, obtains the U.S. FDA approval, can be used for food product pack.Its main drawback is expensive, and is limited with resin compatible, poor dispersion, and antireflective effect is not as the glucitols transparent base.The present invention adopts organophosphate and glucitols transparent base composite, performance organophosphate and glucitols transparent base advantage separately, produce synergistic effect, purpose is that to overcome existing transparent polypropylene plastics rigidity relatively poor, the shortcoming that heat-drawn wire is low, under the prerequisite that keeps good transparency, improve rigidity and the heat-drawn wire of transparent polypropylene, reduce simultaneously cost.
Summary of the invention
One object of the present invention is to provide a kind of transparent polypropylene, and described transparent polypropylene also has good rigidity and heat-drawn wire under the prerequisite that keeps good transparency.
Another object of the present invention is to provide the preparation method of described transparent polypropylene.
For reaching above-mentioned purpose, on the one hand, the invention provides a kind of transparent polypropylene, described transparent polypropylene is prepared from by following weight part raw material:
Polypropylene: 100 parts
Nucleator: 0.1～0.4 part
Oxidation inhibitor: 0.1～0.2 part
Acid-acceptor: 0.05～0.2 part
Lubricant: 0.05～0.1 part
Dispersion agent: 0.05-0.15 part.
Polypropylene of the present invention can be used for any commercially available conventional polypropylene plastics products, the polypropylene plastics products that for example prepares daily box, beverage bottle, crisper, small household appliances etc., those skilled in the art can know this polypropylene material for this area easily on the common prior art basis of its grasp.
Described nucleator is that phosphoric acid salt and glucitols transparent base are composite, and the two weight ratio is 0.1～100, is preferably 0.2～3, more preferably 0.2～0.4.
Experiment showed, that sorbyl alcohol and phosphoric acid salt transparent base carry out composite system, brought into play synergy, the polyacrylic transparency is increased substantially, and improved rigidity and heat-drawn wire, reduced cost.
According to specific embodiments of the present invention, preferred described phosphoric acid salt transparent base is selected from one or more in the following material: two (2, the 4-di-tert-butyl-phenyl) sodium phosphate, 2,2 '-methylene radical-two (4,6-di-n-butyl phenol) sodium phosphate, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, described glucitols transparent base is selected from one or more in the following material: two (3,4-dimethyl two Bians fork) sorbyl alcohol, 1,3-2,4 Sorbitol dibenzals, to the Ethylbenzyl sorbyl alcohol.
According to specific embodiments of the present invention, preferred described oxidation inhibitor is that four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane and 1,3,5-three (3,5-di-t-butyl-4-acrinyl)-2,4,6-trimethylphenyl or tricresyl phosphite (2,4-di-t-butyl) phenyl ester compound antioxidant, the two weight ratio is 0.1～1.0, is preferably 0.5～1.0.
According to specific embodiments of the present invention, preferred described acid-acceptor is calcium stearate, sodium stearate, Zinic stearas or hydrotalcite, is preferably sodium stearate or hydrotalcite.
According to specific embodiments of the present invention, preferred described lubricant is single R-Glyceric acid stearate.
According to specific embodiments of the present invention, preferred described dispersion agent is hydroxy-terminated polybutadienes.
Wherein further preferred hydroxy-terminated polybutadienes molecular weight of the present invention is 2500-4400.
The inventor finds through a large amount of experiments, the novel dispersant that the present invention uses is different from the conventional dispersion agent of amides (such as ethylene bis-fatty acid amides, amine hydroxybenzene, erucicamide etc.), this dispersion agent not only has the effect that helps nucleator to disperse, and have outstanding synergy with nucleator: the nucleator add-on is identical, the novel dispersant that adds a small amount of (about weight fraction 0.2%) can make mist degree reduce by 2～3%, and it is substantially constant to add conventional dispersion agent mist degree.So, the dispersion effect of this dispersion agent, all be higher than usual auxiliaries with the synergistic effect of nucleator, can improve more significantly the transparency, reduce the nucleator consumption, reduce cost, those skilled in the art can not determine this component and proportioning easily according to prior art, can not expect dispersion agent and the synergy of nucleator and the technique effect that brings among the application, and has embodied creativeness of the present invention.
Transparent polypropylene of the present invention there is no particular requirement for the preparation method, prepares burden according to composition provided by the present invention, processes the polypropylene that can obtain to reach the object of the invention according to any acrylic plastering working method of prior art again.
The present invention also provides a kind of method for preparing described transparent polypropylene, and described method comprises the steps: first after nucleator, oxidation inhibitor, acid-acceptor, lubricant, the dispersion agent pre-mixing, again with pre-composition and polypropylene at 160 ℃～240 ℃ extruding pelletizations.
Wherein be more specifically: first oxidation inhibitor, acid-acceptor, lubricant, nucleator, dispersion agent are added in the kneader successively, blade rotating speed 30rpm stirred 10～30 minutes, made pre-composition; Wherein preferably stirred 30 minutes;
Again pre-composition and polypropylene are put into high-speed mixer, stirring velocity 1000rpm stirred 1～3 minute, then with mixture at 160 ℃～240 ℃ extruding pelletizations.
Described extruding can be used twin-screw extrusion.
Described extruding can be for prior art any extrudes operation, the present invention preferably, the expressing technique condition: 220 ℃～240 ℃ of the melt temperatures of extruding pelletization, screw speed is 300～500rpm;
Wherein more particularly: 160～180 ℃ in a district, 200～220 ℃ in two districts, 220～240 ℃ in three districts, 160～180 ℃ in 200～220 ℃ of five district, four districts, screw speed is 300～500rpm, feeding rotating speed 1000～1500rpm, melt pressure 3.0～4.0MPa.
In sum, the invention provides a kind of transparent polypropylene and preparation method thereof.The present invention adopts phosphoric acid salt and glucitols transparent base composite, performance phosphoric acid salt and glucitols transparent base advantage separately, produce synergistic effect, purpose is that to overcome existing transparent polypropylene plastics rigidity relatively poor, the shortcoming that heat-drawn wire is low, under the prerequisite that keeps good transparency, improve rigidity and the heat-drawn wire of transparent polypropylene, reduce simultaneously cost.
Embodiment
Below describe the beneficial effect of implementation process of the present invention and generation in detail by specific embodiment, be intended to help the reader to understand better essence of the present invention and characteristics, but not as the restriction to this case practical range.
Comparative Examples 1
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, polypropylene, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, ethylene bis-fatty acid amides class dispersion agent TAS-2A was by weight 0.15: 0.05: 100: 0.05: 0.1: 0.05: put into high-speed mixer at 0.05: 0.05,1000rpm, mix after 3 minutes, mixture is used the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 35.3%, tensile strength 26.8MPa, modulus in flexure 932MPa, shock strength 27.2J/m, 82 ℃ of heat-drawn wires.
Comparative Examples 2
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, polypropylene, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, the terminal hydroxy group divinyl was by weight 0.15: 0.05: 100: 0.05: 0.1: 0.05: put into high-speed mixer at 0.05: 0.05,1000rpm, mix after 3 minutes, mixture is used the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 33.8%, tensile strength 28.1MPa, modulus in flexure 1008MPa, shock strength 28.2J/m, 84 ℃ of heat-drawn wires.
Embodiment 1
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, the terminal hydroxy group divinyl was by weight 0.15: 0.05: 0.05: 0.1: 0.05: 0.05: after 0.05 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 32.3%, tensile strength 28.5MPa, modulus in flexure 1018MPa, shock strength 29.8J/m, 85 ℃ of heat-drawn wires.
Embodiment 2
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, the terminal hydroxy group divinyl was by weight 0.15: 0.05: 0.05: 0.1: 0.05: 0.05: after 0.1 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 31.1%, tensile strength 28.8MPa, modulus in flexure 1030MPa, shock strength 30.2J/m, 86 ℃ of heat-drawn wires.
Embodiment 3
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.15: 0.05: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 28.5%, tensile strength 28.2MPa, modulus in flexure 1058MPa, shock strength 30.1J/M, 88 ℃ of heat-drawn wires.
Embodiment 4
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.14: 0.06: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 30.5%, tensile strength 29.3MPa, modulus in flexure 1104MPa, shock strength 29.1J/M, 90 ℃ of heat-drawn wires.
Embodiment 5
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 31.8%, tensile strength 29.8MPa, modulus in flexure 1113MPa, shock strength 28.9J/m, 92 ℃ of heat-drawn wires.
Embodiment 6
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.05: 0.15: 0.05: 0.1: 0.05: 0.05: after 0.1 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 33%, tensile strength 26.7MPa, modulus in flexure 1275MPa, shock strength 27.6J/M, 95 ℃ of heat-drawn wires.
Embodiment 7
With 1,3-2,4 Sorbitol dibenzals, 2,2 '-methylene radical-two (4,6-di-n-butyl phenol) sodium phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 32.1%, tensile strength 29.1MPa, modulus in flexure 1098MPa, shock strength 28.1J/m, 91 ℃ of heat-drawn wires.
Embodiment 8
Will be to the Ethylbenzyl sorbyl alcohol, two (2, the 4-di-tert-butyl-phenyl) sodium phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 32.5%, tensile strength 28.9MPa, modulus in flexure 1100MPa, shock strength 28.3J/m, 91 ℃ of heat-drawn wires.
Embodiment 9
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, sodium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 31.2%, tensile strength 29.5MPa, modulus in flexure 1108MPa, shock strength 28.6J/m, 92 ℃ of heat-drawn wires.
Embodiment 10
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, sodium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.2: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 30.9%, tensile strength 29.3MPa, modulus in flexure 1088MPa, shock strength 28.8J/m, 92 ℃ of heat-drawn wires.
Embodiment 11
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, sodium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.2: 0.1: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 30.2%, tensile strength 28.5MPa, modulus in flexure 1078MPa, shock strength 29.1J/m, 91 ℃ of heat-drawn wires.
Embodiment 12
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, hydrotalcite, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 30.9%, tensile strength 30.2MPa, modulus in flexure 1110MPa, shock strength 28.8J/m, 92 ℃ of heat-drawn wires.
Embodiment 13
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.1: 0.1: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 31.6%, tensile strength 29.5MPa, modulus in flexure 1120MPa, shock strength 29.1J/m, 92 ℃ of heat-drawn wires.
Embodiment 14
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, hydroxy-terminated polybutadienes was by weight 0.1: 0.1: 0.1: 0.05: 0.05: 0.05: after 0.15 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 31.8%, tensile strength 29.3MPa, modulus in flexure 1121MPa, shock strength 28.9J/m, 91 ℃ of heat-drawn wires.
Embodiment 15
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, the terminal hydroxy group divinyl was by weight 0.075: 0.025: 0.05: 0.1: 0.05: 0.05,0.05 after the pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 45.3%, tensile strength 27.5MPa, modulus in flexure 988MPa, shock strength 28.2J/m, 80 ℃ of heat-drawn wires.
Embodiment 16
With two (3,4-dimethyl two Bians fork) sorbyl alcohol, methylene-bis (2, the 4-di-tert-butyl-phenyl) aluminum phosphate, four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane, tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester, calcium stearate, single R-Glyceric acid stearate, the terminal hydroxy group divinyl was by weight 0.3: 0.1: 0.05: 0.1: 0.05: 0.05: after 0.05 pre-mixing, mix with 100 parts of polypropylene again, then use the twin screw extruder extruding pelletization at 160 ℃～240 ℃, on injector, make batten after the pellet drying, sample mist degree 20.6%, tensile strength 31.5MPa, modulus in flexure 1233MPa, shock strength 29.2J/m, 90 ℃ of heat-drawn wires.
Can be found out by experimental result, the transparent polypropylene transparency of the present invention, flexural strength and heat-drawn wire under the prerequisite that keeps good transparency, have solved existing transparent polypropylene rigidity relatively poor, the problem that heat-drawn wire is not high apparently higher than Comparative Examples.
Claims (10)
1. a transparent polypropylene is characterized in that, described transparent polypropylene is prepared from by following weight part raw material:
Polypropylene: 100 parts
Nucleator: 0.1～0.4 part
Oxidation inhibitor: 0.1～0.2 part
Acid-acceptor: 0.05～0.2 part
Lubricant: 0.05～0.1 part
Dispersion agent: 0.05-0.15 part.
2. transparent polypropylene according to claim 1 is characterized in that, described nucleator is that phosphoric acid salt and glucitols transparent base are composite, and the two weight ratio is 0.1～100, is preferably 0.2～3, more preferably 0.2～0.4.
3. transparent polypropylene according to claim 2, it is characterized in that, described glucitols transparent base is selected from one or more in the following material: two (3,4-dimethyl, two Bians fork) sorbyl alcohol, 1,3-2,4 Sorbitol dibenzals, to the Ethylbenzyl sorbyl alcohol; The phosphoric acid salt transparent base is selected from one or more in the following material: two (2, the 4-di-tert-butyl-phenyl) sodium phosphate, 2,2 '-methylene radical-two (4,6-di-n-butyl phenol) sodium phosphate, methylene-bis (2,4-di-tert-butyl-phenyl) aluminum phosphate.
4. transparent polypropylene according to claim 1, it is characterized in that, described oxidation inhibitor is that four [β (3,5-di-tert-butyl-hydroxy phenyl propionic acid)] tetramethylolmethane and tricresyl phosphite (2, the 4-di-t-butyl) phenyl ester compound antioxidant, the two weight ratio is 0.1～1.0, is preferably 0.5～1.0.
5. transparent polypropylene according to claim 1 is characterized in that, described acid-acceptor is calcium stearate, sodium stearate, Zinic stearas or hydrotalcite, is preferably sodium stearate or hydrotalcite.
6. transparent polypropylene according to claim 1 is characterized in that, described lubricant is single R-Glyceric acid stearate.
7. transparent polypropylene according to claim 1 is characterized in that, described dispersion agent is hydroxy-terminated polybutadienes.
8. method for preparing the described transparent polypropylene of claim 1～7 any one, it is characterized in that, described method comprises the steps: first after nucleator, oxidation inhibitor, acid-acceptor, lubricant, the dispersion agent pre-mixing, again with pre-composition and polypropylene at 160 ℃～240 ℃ extruding pelletizations.
9. method according to claim 8 is characterized in that, described premix is combined into and adds successively oxidation inhibitor, acid-acceptor, lubricant, nucleator, dispersion agent in the kneader, blade rotating speed 30rpm, stirred 10～30 minutes, and be preferably 30 minutes, make uniform mixture.
10. method according to claim 8 is characterized in that, the melt temperature of described extruding pelletization is 220 ℃～240 ℃, and screw speed is 300～500rpm.
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