CN107641256A - PP composite material of the sprayable exterior trimming parts of automobile and preparation method thereof - Google Patents
PP composite material of the sprayable exterior trimming parts of automobile and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of PP composite material of the sprayable exterior trimming parts of automobile, its raw material is included by mass fraction：High-impact co-polypropylene 30% 70%；High melting means high rigidity homo-polypropylene 10% 30%；Metallocene polyolefin tenacity-increased dose 3% 10%；Talcum powder 5% 20%；Highly polar graft 2% 10%.The invention also discloses a kind of preparation method of PP composite material.PP composite material of the sprayable exterior trimming parts of automobile and preparation method thereof of the present invention, it is grafted, is prepared highly polar polymer-modified by online molten chemical；And by double rank extruding granulators, realize high activity, highly polar polymer-modified secondary real-time melt blending, it is ensured that the surface polarity of gained PP composite material is obviously improved, and improves adhesive force and ageing-resistant performance with painting layer product.
Description
Technical field
The present invention relates to fields such as automobile exterior trimming parts, chemistry, materials, specially a kind of sprayable exterior trimming parts of automobile gathers
Acrylic composite and preparation method thereof.
Background technology
Automotive light weight technology, energy-saving, environmental protection are current auto industry future developing trends, and high performance plastics replace steel
It is that automotive light weight technology studies one of earliest, the most ripe aspect to make parts.With the continuous development of auto industry, to car
Requirement in terms of moulding, color, outward appearance is also constantly to improve, some important exterior trimming parts such as bumper, rearview mirror, covering
Exterior effect, weather-proof ageing resistance after the spraying such as part and ornamental strip are substantially all consistent with the requirement of metallic article coating
But the plastics such as polypropylene of conventional exterior trimming parts spraying, due to its own nonpolar speciality, material surface
Can be often relatively low far below the adhesive force between metal material, with paint, this just must be added to cumbersome postprocessing working procedures as spray
Prime, flame treatment, ethanol etc., improve the surface tension of plastic part, strengthen the bondability with paint face product.
It is also a kind of extremely important for the modification of plastics used in spray piece in itself in addition to the optimization and upgrading in terms of spraying process
Means；CN106084461, CN104558426 describe respectively by the culture of polar chemical material, polymerization reaction kettle grafting come
The method for preparing highly polar polypropylene material, but its volume production characteristic is too low, it is difficult to adapt to modern automobile industry large-scale production
Needs；High-polarity polypropylene material described in CN101717548, it is that surface characteristic is realized by the polar resin of high content
Improvement, but these polar resins such as polyurethane, epoxy resin, ethylene-acrylate etc. often with non-polar polypropylene resin it
Between Presence of an interface consistency problem, so as to seriously affect the performance of PP composite material.
The content of the invention
The purpose of the present invention is：A kind of PP composite material of the sprayable exterior trimming parts of automobile is provided, to be obviously improved
Polypropylene material surface characteristic, meet the performance requirement of automobile exterior trimming parts spraying.
Realizing the technical scheme of above-mentioned purpose is：A kind of PP composite material of the sprayable exterior trimming parts of automobile, it is former
Material is included by mass fraction：High-impact co-polypropylene 30%-70%；High melting means high rigidity homo-polypropylene 10%-30%；Metallocene
Polyolefine toughener 3%-10%；Talcum powder 5%-20%；Highly polar graft 2%-10%.
In a preferred embodiment of the invention, the highly polar graft is polyvinyl resin, Glycidyl methacrylate
Glyceride, peroxide initiator are formed by online fusion-grafting.
In a preferred embodiment of the invention, the quality of the polyvinyl resin accounts for the highly polar graft quality
90%-97%；The quality of the GMA accounts for the 2%-8% of the highly polar graft quality；It is described
The quality of peroxide initiator accounts for the 0.1%-3% of the highly polar graft quality.
In a preferred embodiment of the invention, the peroxide initiator is benzoyl peroxide, peroxidating two is different
At least one of double (t-butyl peroxy) ethyl butyrates of propyl benzene, di-t-butyl peroxide, 3,3-.
In a preferred embodiment of the invention, described metallocene polyolefin tenacity-increased dose of architectural feature includes multiple gather
Ethene and polyoctenamer segment.
In a preferred embodiment of the invention, described talcum powder is density 2.2g/cm3-2.4g/cm3, mesh number is
6000-8000 inorganic particle.
Another object of the present invention is：A kind of preparation method of PP composite material is provided.
Realizing the technical scheme of above-mentioned purpose is：A kind of preparation method of PP composite material, comprises the following steps：Step
Rapid S1) obtain described raw material；Step S2) high-impact co-polypropylene in the mixing raw material, high melting means high rigidity homopolymerization third
Alkene, metallocene polyolefin tenacity-increased dose, talcum powder obtain the first mixture；Step S3) prepare the melt of the highly polar graft；
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and through feeding spiral shell
First mixture is added in the main barrel of extruder and melted by bar；Step S5) by the melt of the highly polar graft
It is injected into from the lateral spout for tightly engaging parallel dual-screw extruding machine in main barrel；Step S6) by molten condition
The melt of first mixture and highly polar graft batch mixing, shearing, scattered, and through tightly engaging parallel dual-screw extruding machine together
Extrusion, obtains extrudate；Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
In a preferred embodiment of the invention, the step S3) comprise the following steps：Step S31) obtain described in preparation
The dispensing of highly polar graft；Step S32) dispensing is mixed, obtain the second mixture；Step S33) described second is mixed
Compound is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, and highly polar grafting is obtained through chemical melting graft reaction
The melt of thing, and extruded through taper Strong shear single screw extrusion machine, then the melt of the highly polar graft of the extrusion is injected
To inside the main barrel for tightly engaging parallel dual-screw extruding machine.
In an of the invention preferred embodiment, the taper Strong shear single screw extrusion machine is from the taper Strong shear list spiral shell
The charge door of the main barrel of bar extruder is sequentially provided with humidity province to head outlet, and the temperature of each humidity province is followed successively by：60℃、90
℃、120℃、130℃、140℃、150℃、150℃。
In a preferred embodiment of the invention, the parallel dual-screw extruding machine that tightly engages tightly engages in the same direction from this
The charge door of the main barrel of double screw extruder is sequentially provided with humidity province to head outlet, and the temperature of each humidity province is followed successively by：60
℃、160℃、190℃、195℃、200℃、210℃、210℃。
It is an advantage of the invention that：The PP composite material of the sprayable exterior trimming parts of automobile of the present invention and its preparation side
Method, it is grafted, is prepared highly polar polymer-modified by online molten chemical；And by double rank extruding granulators, realize
High activity, highly polar polymer-modified secondary real-time melt blending, it is ensured that the surface polarity of gained PP composite material
Be obviously improved, improve the adhesive force and ageing-resistant performance with painting layer product, in some important automobile exterior trimming parts such as
There is good performance in the practical application of bumper, side skirt, beater or beat-up etc.；High-polarity polypropylene composite wood provided by the invention
Material is to extrude hair by melt blending to prepare, compared with reactor polymeric modification, chemical substance culture modification with routine etc., tool
Have that volume production characteristic is good, modified cost is low, the more stable processed edge such as controllable of performance.The present invention is based on highly polar PE modified
Graft, come what is realized, polar polymeric resin such as polyurethane, ethylene acrylic is added with existing with polyacrylic melt blending
Ester, vinyl acetate, epoxy resin etc. are compared to interface compatibility problem is not present, and this is for keeping or even improving polypropylene composite materials
The mechanical performance index of material has great significance.The highly polar graft that mass fraction 5% is only added in the present invention can
The surface tension of PP composite material is promoted to 34-35Dynes/cm from 30-31Dynes/cm, improvement is very bright
Aobvious, and after further flame treatment, the surface tension of material can more be promoted to 42-44Dynes/cm or so, this for
The spraying effect and PASS of exterior trimming parts, which improve, provides good material foundation.
Embodiment
A kind of PP composite material of the sprayable exterior trimming parts of automobile, its raw material are included by mass fraction：High-impact is total to
Polypropylene 30%-70%；High melting means high rigidity homo-polypropylene 10%-30%；Metallocene polyolefin tenacity-increased dose of 3%-10%；Talcum
Powder 5%-20%；Highly polar graft 2%-10%.The highly polar graft is polyvinyl resin, Glycidyl methacrylate is sweet
Grease, peroxide initiator are formed by online fusion-grafting.The quality of the polyvinyl resin accounts for the highly polar grafting
The 90%-97% of amount of substance；The quality of the GMA accounts for the 2%- of the highly polar graft quality
8%；The quality of the peroxide initiator accounts for the 0.1%-3% of the highly polar graft quality.The peroxide draws
Hair agent is in benzoyl peroxide, cumyl peroxide, di-t-butyl peroxide, double (t-butyl peroxy) ethyl butyrates of 3,3-
At least one.Described metallocene polyolefin tenacity-increased dose of architectural feature includes multiple polyethylene and polyoctenamer segment.It is described
Talcum powder be density 2.2g/cm3-2.4g/cm3, mesh number is 6000-8000 inorganic particle.
The present invention is further explained with reference to specific embodiment and comparative example.Wherein, embodiment and comparative example
Raw material and quality accounting it is as shown in table 1 below.
The embodiment of the present invention is raw materials used to be described as follows：
PP-1:High-impact co-polypropylene, melt index MFR are 5g/10min (230 DEG C, 2.16Kg), notch impact strength
56.7kJ/m2。
PP-2:High-impact co-polypropylene, melt index MFR are 20g/10min (230 DEG C, 2.16Kg), notch impact strength
45.9kJ/m2。
PP-3:High melting means high rigidity homo-polypropylene, melt index MFR are 50g/10min (230 DEG C, 2.16Kg), and breach rushes
Hit intensity 3.9kJ/m2。
Metallocene polyolefin tenacity-increased dose：Melt index MFR is 2.0g/10min (190 DEG C, 2.16Kg).
High mesh number talcum powder：Dioxide-containing silica 60%, 6000 mesh.
Highly polar graft, including polyethylene, linear low density polypropylene LLDPE, melt index MFR are 2.0g/10min
(230℃、2.16Kg)；GMA, colourless transparent liquid；Peroxide initiator.
Embodiment 1
A kind of preparation method of PP composite material, comprises the following steps.
Step S1) described raw material is obtained according to table 1.Wherein, in the highly polar graft, the polyvinyl resin
Quality accounts for the 94.5% of the highly polar graft quality；The quality of the GMA accounts for described highly polar
The 5% of graft quality；The quality of the peroxide initiator accounts for the 0.5% of the highly polar graft quality.The mistake
Double (t-butyl peroxy) ethyl butyrates of peroxide initiator selection 3,3-.
Step S2) high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyene in the mixing raw material
Hydrocarbon toughener, talcum powder obtain the first mixture.
Step S3) prepare the melt of the highly polar graft.The step S3) comprise the following steps.
Step S31) obtain the dispensing for preparing the highly polar graft：Polyvinyl resin, methyl propenoic acid glycidyl
Ester, peroxide initiator.
Step S32) dispensing is mixed, obtain the second mixture.
Step S33) second mixture is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, through changing
Learn melting graft reaction and obtain the melt of highly polar graft, and extruded through taper Strong shear single screw extrusion machine, then should
The melt of the highly polar graft of extrusion is injected into described tightly engage inside the main barrel of parallel dual-screw extruding machine.Wherein,
The charge door of the taper Strong shear single screw extrusion machine from the main barrel of the taper Strong shear single screw extrusion machine goes out to head
Mouth is sequentially provided with humidity province, and the temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150
℃。
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and
First mixture is added in the main barrel of extruder through feed screw and melted.
Step S5) melt of the highly polar graft is tightly engaged the lateral of parallel dual-screw extruding machine and fed from described
Material mouth is injected into main barrel.
Step S6) by the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, scattered,
And through tightly engaging parallel dual-screw extruding machine extrusion, obtain extrudate.It is described tightly engage parallel dual-screw extruding machine from this
The charge door for tightly engaging the main barrel of parallel dual-screw extruding machine is sequentially provided with humidity province, the temperature of each humidity province to head outlet
Degree is followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.The a diameter of 35mm of extruder screw, draw ratio
L/D is 40, and engine speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
Embodiment 2
A kind of preparation method of PP composite material, comprises the following steps.
Step S1) described raw material is obtained according to table 1.Wherein, in the highly polar graft, the polyvinyl resin
Quality accounts for the 94.5% of the highly polar graft quality；The quality of the GMA accounts for described highly polar
The 5% of graft quality；The quality of the peroxide initiator accounts for the 0.5% of the highly polar graft quality.The mistake
Double (t-butyl peroxy) ethyl butyrates of peroxide initiator selection 3,3-.
Step S2) high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyene in the mixing raw material
Hydrocarbon toughener, talcum powder obtain the first mixture.
Step S3) prepare the melt of the highly polar graft.The step S3) comprise the following steps.
Step S31) obtain the dispensing for preparing the highly polar graft：Polyvinyl resin, methyl propenoic acid glycidyl
Ester, peroxide initiator.
Step S32) dispensing is mixed, obtain the second mixture.
Step S33) second mixture is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, through changing
Learn melting graft reaction and obtain the melt of highly polar graft, and extruded through taper Strong shear single screw extrusion machine, then should
The melt of the highly polar graft of extrusion is injected into described tightly engage inside the main barrel of parallel dual-screw extruding machine.Wherein,
The charge door of the taper Strong shear single screw extrusion machine from the main barrel of the taper Strong shear single screw extrusion machine goes out to head
Mouth is sequentially provided with humidity province, and the temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150
℃。
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and
First mixture is added in the main barrel of extruder through feed screw and melted.
Step S5) melt of the highly polar graft is tightly engaged the lateral of parallel dual-screw extruding machine and fed from described
Material mouth is injected into main barrel.
Step S6) by the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, scattered,
And through tightly engaging parallel dual-screw extruding machine extrusion, obtain extrudate.It is described tightly engage parallel dual-screw extruding machine from this
The charge door for tightly engaging the main barrel of parallel dual-screw extruding machine is sequentially provided with humidity province, the temperature of each humidity province to head outlet
Degree is followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.The a diameter of 35mm of extruder screw, draw ratio
L/D is 40, and engine speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
Embodiment 3
A kind of preparation method of PP composite material, comprises the following steps.
Step S1) described raw material is obtained according to table 1.Wherein, in the highly polar graft, the polyvinyl resin
Quality accounts for the 94.5% of the highly polar graft quality；The quality of the GMA accounts for described highly polar
The 5% of graft quality；The quality of the peroxide initiator accounts for the 0.5% of the highly polar graft quality.The mistake
Double (t-butyl peroxy) ethyl butyrates of peroxide initiator selection 3,3-.
Step S2) high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyene in the mixing raw material
Hydrocarbon toughener, talcum powder obtain the first mixture.
Step S3) prepare the melt of the highly polar graft.The step S3) comprise the following steps.
Step S31) obtain the dispensing for preparing the highly polar graft：Polyvinyl resin, methyl propenoic acid glycidyl
Ester, peroxide initiator.
Step S32) dispensing is mixed, obtain the second mixture.
Step S33) second mixture is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, through changing
Learn melting graft reaction and obtain the melt of highly polar graft, and extruded through taper Strong shear single screw extrusion machine, then should
The melt of the highly polar graft of extrusion is injected into described tightly engage inside the main barrel of parallel dual-screw extruding machine.Wherein,
The charge door of the taper Strong shear single screw extrusion machine from the main barrel of the taper Strong shear single screw extrusion machine goes out to head
Mouth is sequentially provided with humidity province, and the temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150
℃。
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and
First mixture is added in the main barrel of extruder through feed screw and melted.
Step S5) melt of the highly polar graft is tightly engaged the lateral of parallel dual-screw extruding machine and fed from described
Material mouth is injected into main barrel.
Step S6) by the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, scattered,
And through tightly engaging parallel dual-screw extruding machine extrusion, obtain extrudate.It is described tightly engage parallel dual-screw extruding machine from this
The charge door for tightly engaging the main barrel of parallel dual-screw extruding machine is sequentially provided with humidity province, the temperature of each humidity province to head outlet
Degree is followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.The a diameter of 35mm of extruder screw, draw ratio
L/D is 40, and engine speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
Embodiment 4
A kind of preparation method of PP composite material, comprises the following steps.
Step S1) described raw material is obtained according to table 1.Wherein, in the highly polar graft, the polyvinyl resin
Quality accounts for the 97% of the highly polar graft quality；The quality of the GMA accounts for described highly polar connect
The 2.5% of branch amount of substance；The quality of the peroxide initiator accounts for the 0.5% of the highly polar graft quality.The mistake
Peroxide initiator selects di-t-butyl peroxide.
Step S2) high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyene in the mixing raw material
Hydrocarbon toughener, talcum powder obtain the first mixture.
Step S3) prepare the melt of the highly polar graft.The step S3) comprise the following steps.
Step S31) obtain the dispensing for preparing the highly polar graft：Polyvinyl resin, methyl propenoic acid glycidyl
Ester, peroxide initiator.
Step S32) dispensing is mixed, obtain the second mixture.
Step S33) second mixture is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, through changing
Learn melting graft reaction and obtain the melt of highly polar graft, and extruded through taper Strong shear single screw extrusion machine, then should
The melt of the highly polar graft of extrusion is injected into described tightly engage inside the main barrel of parallel dual-screw extruding machine.Wherein,
The charge door of the taper Strong shear single screw extrusion machine from the main barrel of the taper Strong shear single screw extrusion machine goes out to head
Mouth is sequentially provided with humidity province, and the temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150
℃。
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and
First mixture is added in the main barrel of extruder through feed screw and melted.
Step S5) melt of the highly polar graft is tightly engaged the lateral of parallel dual-screw extruding machine and fed from described
Material mouth is injected into main barrel.
Step S6) by the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, scattered,
And through tightly engaging parallel dual-screw extruding machine extrusion, obtain extrudate.It is described tightly engage parallel dual-screw extruding machine from this
The charge door for tightly engaging the main barrel of parallel dual-screw extruding machine is sequentially provided with humidity province, the temperature of each humidity province to head outlet
Degree is followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.The a diameter of 35mm of extruder screw, draw ratio
L/D is 40, and engine speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
Embodiment 5
A kind of preparation method of PP composite material, comprises the following steps.
Step S1) described raw material is obtained according to table 1.Wherein, in the highly polar graft, the polyvinyl resin
Quality accounts for the 97% of the highly polar graft quality；The quality of the GMA accounts for described highly polar connect
The 2.5% of branch amount of substance；The quality of the peroxide initiator accounts for the 0.5% of the highly polar graft quality.The mistake
Peroxide initiator selects di-t-butyl peroxide.
Step S2) high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyene in the mixing raw material
Hydrocarbon toughener, talcum powder obtain the first mixture.
Step S3) prepare the melt of the highly polar graft.The step S3) comprise the following steps.
Step S31) obtain the dispensing for preparing the highly polar graft：Polyvinyl resin, methyl propenoic acid glycidyl
Ester, peroxide initiator.
Step S32) dispensing is mixed, obtain the second mixture.
Step S33) second mixture is positioned in the main feeding bin of taper Strong shear single screw extrusion machine, through changing
Learn melting graft reaction and obtain the melt of highly polar graft, and extruded through taper Strong shear single screw extrusion machine, then should
The melt of the highly polar graft of extrusion is injected into described tightly engage inside the main barrel of parallel dual-screw extruding machine.Wherein,
The charge door of the taper Strong shear single screw extrusion machine from the main barrel of the taper Strong shear single screw extrusion machine goes out to head
Mouth is sequentially provided with humidity province, and the temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150
℃。
Step S4) first mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and
First mixture is added in the main barrel of extruder through feed screw and melted.
Step S5) melt of the highly polar graft is tightly engaged the lateral of parallel dual-screw extruding machine and fed from described
Material mouth is injected into main barrel.
Step S6) by the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, scattered,
And through tightly engaging parallel dual-screw extruding machine extrusion, obtain extrudate.It is described tightly engage parallel dual-screw extruding machine from this
The charge door for tightly engaging the main barrel of parallel dual-screw extruding machine is sequentially provided with humidity province, the temperature of each humidity province to head outlet
Degree is followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.The a diameter of 35mm of extruder screw, draw ratio
L/D is 40, and engine speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
Comparative example 1
A kind of preparation method of PP composite material, comprises the following steps.
Described raw material is obtained according to table 1.Wherein, the highly polar graft is not included in raw material.Mix the raw material
In high-impact co-polypropylene, high melting means high rigidity homo-polypropylene, metallocene polyolefin tenacity-increased dose, talcum powder obtain mixture.
The mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and through feed screw by the mixing
Thing is added in the main barrel of extruder and melted.By the mixture batch mixing of molten condition, shearing, disperse, and it is same through tightly engaging
Extruded to double screw extruder, obtain extrudate.The parallel dual-screw extruding machine that tightly engages tightly engages in the same direction pair from this
The charge door of the main barrel of screw extruder is sequentially provided with humidity province to head outlet, and the temperature of each humidity province is followed successively by：60℃、
160℃、190℃、195℃、200℃、210℃、210℃.Extruder screw a diameter of 35mm, draw ratio L/D are 40, and main frame turns
Speed is 250 revs/min.
Step S7) extrudate cooling, drying, granulation are handled, obtain the PP composite material.
The Properties of Polypropylene Composite obtained by above-described embodiment 1-5 and comparative example 1 is tested and contrasted below, is surveyed
The performance parameter obtained after examination is as shown in table 2, and wherein test parameter standard is as follows, properties of product test：
Melt flow rate (MFR) is tested；By ISO1133-1 standard testings, test condition is 230 DEG C, 2.26Kg.
Tensile property：Carried out by ISO527-2 standards, test rate 5mm/min.
Bending property：Carried out by IS178 standards, span 64mm, test rate 2mm/min.
Impact property：Carried out by ISO179-1 standards on impact tester for simple supported beam, batten breach is A types, in normal temperature
Tested under (23 DEG C).
Surface tension is tested：Using FordTEST methods, answered with German ARCOTEST surface tension because pen is tested, standard sample
Plate is 150 × 100 × 3.2mm.
Table 2：Embodiment 1-5 and the PP composite material of comparative example 1 the performance test results.
From table 2 from the point of view of each embodiment 1-5 material properties test data, highly polar graft used is for polypropylene
Surface polarity lifting effect or highly significant, by answering because a surface scratch is tested, product obtained by each embodiment
Surface tension resin mostly between 33-35, especially embodiment 2, the highly polar graft for only adding 5% can be by material
Surface tension numerical value be promoted to 35, embody the use characteristic of " low dosage, high synergy "；And in comparative example 1 in contrast,
The PP composite material surface tension of conventional method is only 30 or so, and this is pole for the surface spraying effect for improving the part that paints
For the improvement factor of key；In addition, we also noted that the suitable amount of the polar substances between 5-7%, is further lifted
Dosage improvement and unobvious.
In terms of mechanical property, the strong situation learned performance value and be greatly lowered is not found in each embodiment, with reality
Exemplified by applying example 2, in 5% highly polar graft dosage, the notch impact strength of material is still maintained at 28.7kJ/m2, with
Comparative example 1 compares not obvious inferior position, and in terms of inflexible target, bending modulus and intensity have also been lifted, fully shown
There is good compatibility between each component of gained high-polarity polypropylene composite, thus have at rigidity, the aspect of toughness two
There is good performance, be a kind of PP composite material for being exclusively used in vehicle spray painting exterior trimming parts.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of PP composite material of the sprayable exterior trimming parts of automobile, it is characterised in that its raw material is included by mass fraction：
High-impact co-polypropylene 30%-70%；
High melting means high rigidity homo-polypropylene 10%-30%；
Metallocene polyolefin tenacity-increased dose of 3%-10%；
Talcum powder 5%-20%；
Highly polar graft 2%-10%.
2. the PP composite material of the sprayable exterior trimming parts of automobile according to claim 1, it is characterised in that the height
Polarity graft be polyvinyl resin, GMA, peroxide initiator by online fusion-grafting and
Into.
3. the PP composite material of the sprayable exterior trimming parts of automobile according to claim 2, it is characterised in that described poly-
The quality of vinyl accounts for the 90%-97% of the highly polar graft quality；The matter of the GMA
Amount accounts for the 2%-8% of the highly polar graft quality；The quality of the peroxide initiator accounts for the highly polar graft
The 0.1%-3% of quality.
4. the PP composite material of the sprayable exterior trimming parts of automobile according to claim 2, it is characterised in that the mistake
Peroxide initiator is benzoyl peroxide, cumyl peroxide, di-t-butyl peroxide, 3,3- are double（T-butyl peroxy）Fourth
At least one of acetoacetic ester.
5. the PP composite material of the sprayable exterior trimming parts of automobile according to claim 1, it is characterised in that the cyclopentadienyl
The architectural feature of metal polyolefine toughener includes multiple polyethylene and polyoctenamer segment.
6. the PP composite material of the sprayable exterior trimming parts of automobile according to claim 1, it is characterised in that described
Talcum powder is the g/cm of density 2.23-2.4 g/cm3, mesh number is 6000-8000 inorganic particle.
7. a kind of preparation method of PP composite material, it is characterised in that comprise the following steps：
Step S1）Obtain the PP composite material raw material described in any one of claim 1-6；
Step S2）The high-impact co-polypropylene in the raw material, high melting means high rigidity homo-polypropylene, metallocene-polyolefin is mixed to increase
Tough dose, talcum powder obtain the first mixture；
Step S3）Prepare the melt of the highly polar graft；
Step S4）First mixture is positioned in the main feeding bin for tightly engaging parallel dual-screw extruding machine, and through feeding
First mixture is added in the main barrel of extruder by material screw rod to be melted；
Step S5）By the melt of the highly polar graft from the lateral spout for tightly engaging parallel dual-screw extruding machine
It is injected into main barrel；
Step S6）By the melt of the first mixture of molten condition and highly polar graft together batch mixing, shearing, disperse, and pass through
Parallel dual-screw extruding machine extrusion is tightly engaged, obtains extrudate；
Step S7）To extrudate cooling, drying, granulation processing, the PP composite material is obtained.
8. the preparation method of PP composite material according to claim 7, it is characterised in that the step S3）Including
Following steps：
Step S31）Obtain the dispensing for preparing the highly polar graft；
Step S32）The dispensing is mixed, obtains the second mixture；
Step S33）Second mixture is positioned over to the main feeding bin of taper Strong shear single screw extrusion machine
In, the melt of highly polar graft is obtained through chemical melting graft reaction, and through taper Strong shear list spiral shell
Bar extruder is extruded, and the melt of the highly polar graft of the extrusion then is injected into described tightly engage
Inside the main barrel of parallel dual-screw extruding machine.
9. the preparation method of PP composite material according to claim 8, it is characterised in that the taper Strong shear list
Screw extruder exports from the charge door of the main barrel of the taper Strong shear single screw extrusion machine to head and is sequentially provided with humidity province,
The temperature of each humidity province is followed successively by：60℃、90℃、120℃、130℃、140℃、150℃、150℃.
10. the preparation method of PP composite material according to claim 7, it is characterised in that described to tightly engage together
It is sequentially provided with to the charge door of double screw extruder from the main barrel for tightly engaging parallel dual-screw extruding machine to head outlet
Humidity province, the temperature of each humidity province are followed successively by：60℃、160℃、190℃、195℃、200℃、210℃、210℃.
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Application publication date: 20180130 |