CN109679222A - Low temperature resistant transparent polypropylene compound and preparation method thereof for automobile - Google Patents
Low temperature resistant transparent polypropylene compound and preparation method thereof for automobile Download PDFInfo
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- CN109679222A CN109679222A CN201910012727.4A CN201910012727A CN109679222A CN 109679222 A CN109679222 A CN 109679222A CN 201910012727 A CN201910012727 A CN 201910012727A CN 109679222 A CN109679222 A CN 109679222A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The low temperature resistant transparent polypropylene compound and preparation method thereof that the invention discloses a kind of for automobile, by weight percentage, it is characterized by: above-mentioned compound includes homopolypropylene 55-80%, atactic copolymerized polypropene 10-35%, toughener 3-9%, polyethylene 3-5%, heat-resistant agent 0.6-1%, nucleating agent 0.5-1%, then by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleating agent is placed in high-speed mixer and uniformly mixes, using double screw extruder melting mixing, compound is obtained it is expected that the product for solving existing polyacrylic preparation is insufficient there are low temperature resistant toughness or there are the risks of high temperature deformation, in addition expansion tank belongs to the product for being mounted in engine periphery, it is chronically at the environment of higher temperature, especially high temperature season is easy The problem of thermo-oxidative ageing, deformation even result in explosion.
Description
Technical field
The present invention relates to vehicle materials, and in particular to a kind of low temperature resistant transparent polypropylene compound and its system for automobile
Preparation Method.
Background technique
Polypropylene is cheap and density is relatively small, has good mechanical property and moulding processability, higher resistance to
Temperature is used continuously up to 110-120 DEG C in hot, good chemical stability, but polyacrylic cold resistance is poor, low-temperature resistance
Impact strength is low；Polyacrylic product in use vulnerable to light, heat and oxygen effect and aging, and polypropylene ordinary circumstance situation
Lower spherocrystal volume is big, and there is light scattering at interface, causes its transparency lower；The preparation method technique of existing transparent polypropylene is multiple
Miscellaneous, investment is larger, and the low-temperature flexibility for the polypropylene material prepared is 3.2kJ/ square metres, is not able to satisfy portioned product and exists
Requirement in low temperature environment, even polyacrylic composite material tensile strength can reach 34MPa, and weld mark stretches strong
Degree reaches 33.5MPa, and room temperature notch impact strength only has 8kJ/ square metres, although having after increasing cold-resistant toughened dose cold-resistant
Performance, but intensity and modulus is relatively low, and still there are the risks of temperature distortion under high temperature environment.
Common automotive expansion tank product requirement, the product of existing polyacrylic preparation there are low temperature resistant toughness it is insufficient or
There are the risks of high temperature deformation, and in addition expansion tank belongs to the product for being mounted in engine periphery, are chronically at higher temperature
Environment, especially high temperature season be easy thermo-oxidative ageing, deformation even result in explosion.
Summary of the invention
The low temperature resistant transparent polypropylene compound and preparation method thereof that the purpose of the present invention is to provide a kind of for automobile,
It is in addition swollen with the product of the existing polyacrylic preparation of expectation solution there are low temperature resistant toughness deficiency or there are the risk of high temperature deformation
Swollen kettle belongs to the product for being mounted in engine periphery, is chronically at the environment of higher temperature, especially high temperature season and is easy
The problem of thermo-oxidative ageing, deformation even result in explosion.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of low temperature resistant transparent polypropylene compound for automobile, by weight percentage, it is characterised in that: above-mentioned multiple
Close object include homopolypropylene 55-80%, it is atactic copolymerized polypropene 10-35%, toughener 3-9%, polyethylene 3-5%, heat-resisting
Agent 0.6-1%, nucleating agent 0.5-1%；Its goal of the invention is to refer to the homopolypropylene and random copolymerization of high fondant-strength with eutectic
Polypropylene is base-material, brings the toughness between atactic copolymerized polypropene and homopolypropylene together by toughener, is played by heat-resistant agent
Synergistic effect achievees the purpose that long-acting heat oxygen aging resistance, after being mixed by nucleating agent raising homopolypropylene with atactic copolymerized polypropene
Crystallization temperature, polyethylene heat resisting temperature, compound whole clearing degree.
Preferably, by weight percentage, above-mentioned compound includes homopolypropylene 60-75%, random copolymerization poly- third
Alkene 15-26%, toughener 5-7%, polyethylene 4-5%, heat-resistant agent 0.8-1%, nucleating agent 0.8-1%.
Preferably, above-mentioned toughener is the mixing of the one or both of ternary ethylene-propylene copolymer, ethylene-octene copolymer
Object.
Further technical solution is that above-mentioned ethylene-octene copolymer is polyolefin elastomer 8677, density 0.87
Gram/cc, melt index 0.5g/10min.
Preferably, above-mentioned polyethylene is linear low density polyethylene (LLDPE).
Further technical solution is that above-mentioned low density polyethylene (LDPE) is DFDA-7042, and density is 0.9-0.92 grams/cube
Centimetre, melt index 2.0g/10min.
Preferably, above-mentioned heat-resistant agent includes CHINOX-1790, CHINOX-S4P, CHINOX-1035, CHINOX-300
In the middle any one or more.
Preferably, above-mentioned nucleating agent is 1,3,5- tri- t-butyl carboxamide base benzene and dehydroabietic acid, dehydroabietic acid potassium and dehydrogenation
The eutectiferous mixture of sodium abietate.
It is above-mentioned to be used for the present invention also provides a kind of preparation method of low temperature resistant transparent polypropylene compound for automobile
The low temperature resistant transparent polypropylene compound of automobile weighs homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resisting
Then homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleating agent are placed in high speed by agent, nucleating agent
It is uniformly mixed in mixing machine, using double screw extruder melting mixing, obtains compound.
Preferably, area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, two area's temperature are 180-200
Degree Celsius, three area's temperature are 200-240 degrees Celsius, and four area's temperature are 200-240 degrees Celsius, and five area's temperature are that 200-240 is Celsius
Degree, six area's temperature be 190-220 degrees Celsius, seven area's temperature be 190-220 degrees Celsius, eight area's temperature be 190-220 degrees Celsius, nine
Area's temperature is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned twin-screw extrusion
The engine speed of machine is 400-600rpm.
Compared with prior art, the beneficial effects of the present invention are:
It is substrate by homopolypropylene and atactic copolymerized polypropene, homopolypropylene intensity with higher and good
Toughness, heat-resistant deformation ability with higher, and with cold-resistant transparent atactic copolymerized polypropene arrange in pairs or groups, pass through low temperature resistant elastomer
Toughener carry out toughening, reach cold-resistant requirement；Compound is promoted to reach long-acting resistance to by the heat-resistant agent efficiently cooperateed with
The purpose of thermo-oxidative ageing；Using the nucleating agent of compounding, the crystallization temperature and heat resisting temperature of polypropylene composite are improved, difference is utilized
The cooperation of crystal-type nucleater maintains a small amount of polyethylene and atactic copolymerized polypropene, homopolypropylene under the action of toughener
The modified effect of blending makes it still have good transparency, improves the high and low temperature resistance of polypropylene composite, the material
Material can be suitable for blow molding or injection molding produces to obtain automobile expansion tank.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1:
The present embodiment is the low temperature resistant transparent polypropylene compound for automobile for preparing double centner, according to following step
It is rapid:
Step S1, material selection chooses homopolypropylene 55kg, atactic copolymerized polypropene 35kg, toughener 3.2kg, poly- second
Alkene 5kg, heat-resistant agent 0.8kg, nucleating agent 1kg；At 230 degrees Celsius, under the conditions of loading 2.16KG counterweight, homopolypropylene melts
Melting index is 6g/10min, and the melt index of atactic copolymerized polypropene is 6g/10min.
Step S2, uniformly mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleation
Agent is placed in high-speed mixer and uniformly mixes.
Step S3, melting mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, poly- second after evenly mixing
Alkene, heat-resistant agent, nucleating agent obtain compound by double screw extruder melting mixing.
Wherein area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, and two area's temperature are that 180-200 is Celsius
Degree, three area's temperature be 200-240 degrees Celsius, four area's temperature be 200-240 degrees Celsius, five area's temperature be 200-240 degrees Celsius, six
Area's temperature is 190-220 degrees Celsius, and seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, nine Qu Wen
Degree is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned double screw extruder
Engine speed is 400-600rpm.
Crystallization rate is reduced by polyethylene combination random copolymerization poly- third, improves strength compounds toughness and impact strength；It is poly-
Ethylene improves the rigidity of compound in conjunction with homopolypropylene, and low-temperature flexibility is promoted, and improves the crisp of its homopolypropylene itself
Property, thus obtained polypropylene composite has excellent toughness, the transparency, toughness and impact strength.
Embodiment 2:
According to above-described embodiment, another embodiment of the invention is prepare double centner low temperature resistant for automobile
Transparent polypropylene compound, in accordance with the following steps:
Step S1, material selection chooses homopolypropylene 60kg, atactic copolymerized polypropene 26kg, toughener 8.4kg, poly- second
Alkene 4kg, heat-resistant agent 0.8kg, nucleating agent 0.8kg；At 230 degrees Celsius, under the conditions of loading 2.16KG counterweight, homopolypropylene
Melt index is 6g/10min, and the melt index of atactic copolymerized polypropene is 6g/10min.
Step S2, uniformly mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleation
Agent is placed in high-speed mixer and uniformly mixes.
Step S3, melting mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, poly- second after evenly mixing
Alkene, heat-resistant agent, nucleating agent obtain compound by double screw extruder melting mixing.
Wherein area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, and two area's temperature are that 180-200 is Celsius
Degree, three area's temperature be 200-240 degrees Celsius, four area's temperature be 200-240 degrees Celsius, five area's temperature be 200-240 degrees Celsius, six
Area's temperature is 190-220 degrees Celsius, and seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, nine Qu Wen
Degree is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned double screw extruder
Engine speed is 400-600rpm, thus obtained polypropylene composite.
Above-mentioned toughener is the mixture of the one or both of ternary ethylene-propylene copolymer, ethylene-octene copolymer, ternary
Ethylene-propylene copolymer 30%, ethylene-octene copolymer 70%；Toughening is carried out by the toughener of low temperature resistant elastomer, makes compound
Reach cold-resistant requirement.
Further, in order to improve bending modulus and bending strength, above-mentioned ethylene-octene copolymer is polyolefin elastomer
8677, density is 0.87 gram/cc, melt index 0.5g/10min, 8677 glass transition temperature of polyolefin elastomer
It is -67 degrees Celsius, polyacrylic low-temperature flexibility can be significantly improved, homopolypropylene is adjusted by ethylene-octene copolymer, is randomly total to
Balance between poly- polypropylene makes compound have good bending modulus and bending strength.
Embodiment 3:
According to above-described embodiment, another embodiment of the invention is prepare 200 kilograms low temperature resistant for automobile
Transparent polypropylene compound, in accordance with the following steps:
Step S1, material selection chooses homopolypropylene 160kg, atactic copolymerized polypropene 24kg, toughener 6.6kg, poly- second
Alkene 6kg, heat-resistant agent 2kg, nucleating agent 1.4kg；At 230 degrees Celsius, under the conditions of loading 2.16KG counterweight, homopolypropylene melts
Melting index is 6g/10min, and the melt index of atactic copolymerized polypropene is 6g/10min；
Step S2, uniformly mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleation
Agent is placed in high-speed mixer and uniformly mixes；
Step S3, melting mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, poly- second after evenly mixing
Alkene, heat-resistant agent, nucleating agent obtain compound by double screw extruder melting mixing.
Wherein area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, and two area's temperature are that 180-200 is Celsius
Degree, three area's temperature be 200-240 degrees Celsius, four area's temperature be 200-240 degrees Celsius, five area's temperature be 200-240 degrees Celsius, six
Area's temperature is 190-220 degrees Celsius, and seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, nine Qu Wen
Degree is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned double screw extruder
Engine speed is 400-600rpm；
Crystallization rate is reduced by polyethylene combination random copolymerization poly- third, improves strength compounds toughness and impact strength；It is poly-
Ethylene improves the rigidity of compound in conjunction with homopolypropylene, and low-temperature flexibility is promoted, and improves the crisp of its homopolypropylene itself
Property, thus obtained polypropylene composite.
Above-mentioned polyethylene is linear low density polyethylene (LLDPE), and in order to keep good viscosity in extrusion process, utilization is low
Density polyethylene faster, keeps its compatibility good in the sensibility of shear history, the stress relaxation for making polymer molecular chain.
Further, in order to promote compatibility, above-mentioned low density polyethylene (LDPE) selects model DFDA-7042, and density is
0.9-0.92 grams/cc, melt index 2.0g/10min, toughener can be effectively improved to equal by DFDA-7042
The compatibility of poly- polypropylene, atactic copolymerized polypropene, but can improve homopolypropylene in, rule copolymer polypropylene toughness, in conjunction with
Homopolypropylene, the crystallinity of atactic copolymerized polypropene is effectively reduced in polyethylene, improves material shock resistance degree, and will not shadow
Ring the transparency of compound.
Embodiment 4:
According to above-described embodiment, another embodiment of the invention is prepare 300 kilograms low temperature resistant for automobile
Transparent polypropylene compound, in accordance with the following steps:
Step S1, material selection is chosen homopolypropylene 210kg, atactic copolymerized polypropene 48kg, toughener 22.8kg, is gathered
Ethylene 15kg, heat-resistant agent 2.4kg, nucleating agent 1.8kg；At 230 degrees Celsius, under the conditions of loading 2.16KG counterweight, homopolymerization poly- third
The melt index of alkene is 6g/10min, and the melt index of atactic copolymerized polypropene is 6g/10min.
Step S2, uniformly mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleation
Agent is placed in high-speed mixer and uniformly mixes.
Step S3, melting mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, poly- second after evenly mixing
Alkene, heat-resistant agent, nucleating agent obtain compound by double screw extruder melting mixing.
Wherein area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, and two area's temperature are that 180-200 is Celsius
Degree, three area's temperature be 200-240 degrees Celsius, four area's temperature be 200-240 degrees Celsius, five area's temperature be 200-240 degrees Celsius, six
Area's temperature is 190-220 degrees Celsius, and seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, nine Qu Wen
Degree is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned double screw extruder
Engine speed is 400-600rpm；
Crystallization rate is reduced by polyethylene combination random copolymerization poly- third, improves strength compounds toughness and impact strength；It is poly-
Ethylene improves the rigidity of compound in conjunction with homopolypropylene, and low-temperature flexibility is promoted, and improves the crisp of its homopolypropylene itself
Property, thus obtained polypropylene composite.
Above-mentioned heat-resistant agent includes any in CHINOX-1790, CHINOX-S4P, CHINOX-1035, CHINOX-300
It is one or more, by full resistance/half resistance phenol antioxidant of above-mentioned model, inhibit material in use in light, heat, ozonization
Lower oxidative chain reactions make appearance, physical and chemical performance, the mechanical performance of material tend towards stability；Choose above-mentioned single full resistance/half
Phenol antioxidant or a variety of full resistances/half resistance phenol antioxidant are hindered, the antioxidation of collaboration is played.
Embodiment 5:
According to above-described embodiment, another embodiment of the invention is prepare 1000 kilograms resistance to low for automobile
Warm transparent polypropylene compound, in accordance with the following steps:
Step S1, material selection chooses homopolypropylene 740kg, atactic copolymerized polypropene 150kg, toughener 67kg, poly- second
Alkene 30kg, heat-resistant agent 6kg, nucleating agent 7kg；At 230 degrees Celsius, under the conditions of loading 2.16KG counterweight, homopolypropylene melts
Melting index is 6g/10min, and the melt index of atactic copolymerized polypropene is 6g/10min.
Step S2, uniformly mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resistant agent, nucleation
Agent is placed in high-speed mixer and uniformly mixes.
Step S3, melting mixing, by homopolypropylene, atactic copolymerized polypropene, toughener, poly- second after evenly mixing
Alkene, heat-resistant agent, nucleating agent obtain compound by double screw extruder melting mixing.
Wherein area's temperature of above-mentioned double screw extruder is 180-200 degrees Celsius, and two area's temperature are that 180-200 is Celsius
Degree, three area's temperature be 200-240 degrees Celsius, four area's temperature be 200-240 degrees Celsius, five area's temperature be 200-240 degrees Celsius, six
Area's temperature is 190-220 degrees Celsius, and seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, nine Qu Wen
Degree is 190-220 degrees Celsius, 200-240 degrees Celsius of the die head temperature of above-mentioned double screw extruder, above-mentioned double screw extruder
Engine speed is 400-600rpm.
Crystallization rate is reduced by polyethylene combination random copolymerization poly- third, improves strength compounds toughness and impact strength；It is poly-
Ethylene improves the rigidity of compound in conjunction with homopolypropylene, and low-temperature flexibility is promoted, and improves the crisp of its homopolypropylene itself
Property, thus obtained polypropylene composite.
Above-mentioned nucleating agent is tri- t-butyl carboxamide base benzene of 1,3,5- and dehydroabietic acid, dehydroabietic acid potassium and dehydroabietic acid sodium eutectic
The mixture of body, 1,3,5- tri- t-butyl carboxamide base benzene account for 60%, dehydroabietic acid, dehydroabietic acid potassium and dehydroabietic acid sodium eutectic
40% is accounted for, by the good dispersibility of 1,3,5- tri- t-butyl carboxamide base benzene, improves homopolypropylene, atactic copolymerized polypropene
Young's modulus, dehydroabietic acid, dehydroabietic acid potassium and dehydroabietic acid sodium eutectic are than being used alone dehydroabietic acid potassium, dehydroabietic acid
Sodium nucleation efficiencies are higher, and the crystallization temperature and heat distortion temperature of compound improve after nucleation, and mechanical property is improved, spherocrystal
Size is reduced, and transparency improves.
Embodiment 6:
The present embodiment is above-described embodiment comparative example, by material injection made of above-mentioned 1 to 5 embodiment at standard sample
Item, detection data, data are obtained by following standard detection:
Tensile strength is measured by GB/T1040；
Bending strength, elasticity modulus are measured by GB/T9341；
Izod notched impact strength under room temperature, low temperature is measured according to GB/T1843；
Melt flow rate (MFR) is measured by GB/T3682；
Thermo-oxidative ageing is measured by GB/T 7141；
Transparency is measured by GB/T2410；
The detection of its heat ageing be in heat aging test chamber under conditions of 150 degrees Celsius, Shi Changwei 500 hours into
Row.
" one embodiment ", " another embodiment ", " embodiment ", " preferred embodiment " spoken of in the present specification
Deng, refer to combine the embodiment description specific features, structure or feature include the application generality description at least
In one embodiment.It is not centainly to refer to the same embodiment that statement of the same race, which occur, in multiple places in the description.Further
For, when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is to combine other embodiments
To realize that this feature, structure or feature are also fallen within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.More specifically, it is disclosed, in the scope of the claims in the application, it can be to master
The building block and/or layout for inscribing composite configuration carry out a variety of variations and modifications.In addition to what is carried out to building block and/or layout
Outside modification and improvement, to those skilled in the art, other purposes also be will be apparent.
Claims (10)
1. a kind of low temperature resistant transparent polypropylene compound for automobile, it is characterised in that: the compound includes by weight hundred
Point than the homopolypropylene 55-80% of meter, atactic copolymerized polypropene 10-35%, toughener 3-9%, polyethylene 3-5%, heat-resisting
Agent 0.6-1%, nucleating agent 0.5-1%.
2. the low temperature resistant transparent polypropylene compound according to claim 1 for automobile, it is characterised in that: described compound
Object includes homopolypropylene 60-75% by weight percentage, atactic copolymerized polypropene 15-26%, toughener 5-7%, poly-
Ethylene 4-5%, heat-resistant agent 0.8-1%, nucleating agent 0.8-1%.
3. the low temperature resistant transparent polypropylene compound according to claim 1 for automobile, it is characterised in that: the toughening
Agent is the mixture of the one or both of ternary ethylene-propylene copolymer, ethylene-octene copolymer.
4. the low temperature resistant transparent polypropylene compound according to claim 3 for automobile, it is characterised in that: the second
Alkene-octene copolymer is polyolefin elastomer 8677, and density is 0.87 gram/cc, melt index 0.5g/10min.
5. the low temperature resistant transparent polypropylene compound according to claim 1 for automobile, it is characterised in that: the poly- second
Alkene is linear low density polyethylene (LLDPE).
6. the low temperature resistant transparent polypropylene compound according to claim 5 for automobile, it is characterised in that: described low close
Degree polyethylene is DFDA-7042, and density is 0.9-0.92 grams/cc, melt index 2.0g/10min.
7. the low temperature resistant transparent polypropylene compound according to claim 1 for automobile, it is characterised in that: described heat-resisting
Agent includes any one or more in CHINOX-1790, CHINOX-S4P, CHINOX-1035, CHINOX-300.
8. the low temperature resistant transparent polypropylene compound according to claim 1 for automobile, it is characterised in that: the nucleation
Agent is tri- t-butyl carboxamide base benzene of 1,3,5- and dehydroabietic acid, dehydroabietic acid potassium and the eutectiferous mixture of dehydroabietic acid sodium.
9. a kind of preparation method of the low temperature resistant transparent polypropylene compound for automobile, it is characterised in that: by claim 1 to
Low temperature resistant transparent polypropylene compound described in 8 any one for automobile weighs homopolypropylene, atactic copolymerized polypropene, increasing
Tough dose, polyethylene, heat-resistant agent, nucleating agent, then by homopolypropylene, atactic copolymerized polypropene, toughener, polyethylene, heat-resisting
Agent, nucleating agent are placed in high-speed mixer and uniformly mix, and using double screw extruder melting mixing, obtain compound.
10. according to the preparation method for the low temperature resistant transparent polypropylene compound for being used for automobile described in claim 9, it is characterised in that:
One area's temperature of the double screw extruder is 180-200 degrees Celsius, and two area's temperature are 180-200 degrees Celsius, and three area's temperature are
200-240 degrees Celsius, four area's temperature are 200-240 degrees Celsius, and five area's temperature are 200-240 degrees Celsius, and six area's temperature are 190-
220 degrees Celsius, seven area's temperature are 190-220 degrees Celsius, and eight area's temperature are 190-220 degrees Celsius, and nine area's temperature are taken the photograph for 190-220
Family name's degree, 200-240 degrees Celsius of the die head temperature of the double screw extruder, the engine speed of the double screw extruder are 400-
600rpm。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031849A (en) * | 2021-11-19 | 2022-02-11 | 苏州汇源塑胶制品有限公司 | Ultralow-temperature-resistant middle plate and preparation method thereof |
| CN114773734A (en) * | 2022-03-30 | 2022-07-22 | 上海升广科技有限公司 | Cold-resistant high-toughness copolymerized polypropylene plastic and preparation method thereof |
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