CN1727390A - Composite material of polypropylene in low smell and preparation method - Google Patents
Composite material of polypropylene in low smell and preparation method Download PDFInfo
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Abstract
A polypropene composition with low odor is proportionally prepared from polypropene, talc powder, molecular sieve (powdered silicoaluminate of alkali-metal), toughening agent poe, and thermal stabilizer.
Description
Technical field
The present invention relates to a kind of polypropylene composite material of low smell, more specifically relate to by adding a kind of smell inhibitor that can effectively suppress bad smell in the polypropylene composite material, thereby prepare a kind of polypropylene composite material of low smell.The invention still further relates to the preparation method of this matrix material.
Background technology
In recent years, because the fast development of polypropylene material through engineering approaches modification technology, therefore, it in the application of automotive field more and more widely.Yet, as the important component part of through engineering approaches polypropylene material in automotive field, the various automotive trim products of making by the through engineering approaches polypropylene material, though all can meet corresponding requirements on its use properties in every respect, but, therefore be subjected to the human consumer and more and more queried because these materials all can discharge some niff in varying degrees.And along with people's environment protection health consciousness constantly strengthens, suffered challenge will be more and more serious on the one hand at this for polypropylene material.For this reason, in order further to expand the application of polypropylene material, must search out an effective way to prepare low smell even scentless polypropylene material in association area.
Usually, it is believed that the smell of polypropylene material is owing to the following aspects causes.At first, the catalyst system that uses in acrylic resin matrix building-up process contains the compound that some have the pungency peculiar smell, as ester compound or alkane derivative.This compounds can not be removed after resin polymerization is finished fully, and they remain in the middle of the acrylic resin, thereby makes polypropylene material have the pungency peculiar smell.Secondly, carry out at the acrylic resin matrix in the middle of the process of modification processing, acrylic resin more or less can produce the low molecular compound of some degraded under the fused state, as ketone, aldehyde compound.These material parts rest in the middle of the material after the modification, progressively give out irritating smell in the use of product.Once more, some filler components that added in the modified polypropylene material, as talcum powder, they can have some irritating smell equally.At last, some stablizer that is added in the modified polypropylene material also has certain pungency peculiar smell.
Round the factor of above-mentioned several respects, people do a lot, and related basic skills is physical adsorption and chemical reaction two big classes nothing more than.
Chemical reaction method is meant and adds the additive that can discharge small molecules reaction of smell with these in the middle of material prescription, by the reaction between these additives and the small molecules produce molecular weight big, use under the thermal environment normal, as less than 100 ℃, can from material, not evaporate the another kind of compound that produces peculiar smell, thereby reach the effect of eliminating peculiar smell.Though the related reaction of this method is extremely complicated,, therefore progressively caused people's interest in recent years owing to can control other performances that do not influence material on this theoretical method.
In U.S. Pat P.4 Rifi etc. have pointed out in 851,499, have ester compound in the catalyst system in the middle of isotatic polypropylene resin polymerization process, as ethyl benzoate, residue, this class residue itself is some compounds that have the pungency peculiar smell.For removing contained these materials that have of acrylic resin matrix, the method that he proposes is: adopt a kind of esterification glyceride type compound, a kind of epoxy compounds, a kind of monohydroxy-alcohol or multicomponent alcoholics compound, a kind of fatty acid ester compound or the mixture of above-mentioned several compounds, by above-claimed cpd and acrylic resin are melt extruded, carry out transesterification reaction at the ester class residue that makes these compounds in the middle of the process of extruding and have a peculiar smell and form other macromolecular compounds and be fixed in the middle of the resin, thereby reach the purpose of removing this smell.
In U.S. Pat P.5 Fukui etc. have mentioned the another kind of media that exists in 109,056 in relevant catalyst system in the middle of the acrylic resin polymerization process, alkane derivative, the residue of this compounds also can exert an influence to the smell of polypropylene material.The solution that he proposes is to adopt the method for high temperature extruding pelletization, and adopts the mode that vacuumizes in the middle of the process of extruding, and again the particle of making is carried out flint dry at last, with this these residues is carried out physics and removes.
In U.S. Pat P.5 Burch etc. have mentioned the small molecules that the method for using a kind of rosin ester solves the polypropylene material peculiar smell with irritating that cracking goes out in the middle of modification is subjected to thermal process in 041,483.
Abe etc. are at U.S. Pat P5, have proposed to use the mixture of a kind of zinc oxide, titanium dioxide and water to solve the talcous smell problem of adding in the modified polypropylene material in 023,286.
Yui etc. are at U.S. Pat P4,080, adopt a kind of alkyl 3 in 359, the method for 5-two-Te-butyl-4-hydroxyl-carboxylation styracin and dialkyl group thiodipropionate acetate mixture solves the smell problem that some stablizers brought of being added in the middle of the modified polypropylene material.
Above-mentioned these methods on some angle, all have in various degree solution to the smell problem of polypropylene material.Yet as the polypropylene material that the automotive trim product uses, its relevant smell factor that will consider at modifying process is not only certain discrete factor wherein.At first, the fundamental starting point that solves this class modified polypropylene material smell must consider that certainly acrylic resin matrix self some in the middle of polymerization process have the residue problem of pungency peculiar smell; Secondly, therefore this class modified polypropylene material all must will consider the thermo-cracking small molecules problem in the extruding pelletization process through melt extruding granulation; Once more, the smell problem of the mineral constituent of being added also must be taken into account; At last, it is common also very high that the thermo-oxidative ageing of this class polypropylene material requires, and therefore must add corresponding stabiliser system, and this must consider in the stabilizer component some the smell problem that may bring.And above-mentioned the whole bag of tricks all is to stress certain aspect is wherein improved, and can not solve the problem that all respects produce smells.
Physical adsorption can be adsorbed the small molecules of any generation smell in theory, therefore might improved effect all be arranged to all respects that produce smell.Yet traditional physical adsorption method can only be to adopt gac as sorbent material usually, by the micropore in the gac small molecules that discharges smell in the macromolecular material is played adsorption, thereby reduces the smell of material.This method unavoidably can produce a lot of problems.At first, because gac is from the color as black, so can only use in black material.Secondly, the gac addition is very big to the mechanical property influence of material.Simultaneously, we find material added gac as sorbent material after, because the micropore size size distribution inequality in the gac, difference is very big, maximum aperture is greatly to the 1000 Izod right sides, therefore often other intermediate molecular weight additives that add are simultaneously adsorbed together, influenced other characteristics of material so again, as thermo-oxidative stability etc.Therefore, this method practical value is little.
For this reason, if can find a kind of energy active adsorption to produce the smell small molecules, the sorbing material that does not have simultaneously the above-mentioned defective of gac again, then can develop a kind of above-mentioned each side factor that can fully take into account, solve low smell or the scentless polypropylene composite material of above-mentioned various smell problems comprehensively.
Summary of the invention
The purpose of this invention is to provide polypropylene material of a kind of low smell and preparation method thereof, more specifically relate to by adding a kind of smell remover that can effectively reduce the polypropylene material smell, thereby prepare a kind of polypropylene material of low smell.
For realizing above purpose, the polypropylene composite material of a kind of low smell of the present invention has added a kind of smell remover, and it is made up of the raw material of following weight percent (%):
Polypropylene 55-95
Talcum powder 0-40
Molecular sieve 0.5-5
Toughner poe 0-10
Thermo-stabilizer DSTP 0.3-3.0
Wherein, described molecular sieve is a kind of alkali metal aluminosilicate powder of sodium type crystal structure, and diameter of particle is not less than 200 orders, and the microporous molecular sieve aperture is not less than 10 dusts; Described thermo-stabilizer 3114 chemization formal names used at school are called 3,5-di-tert-butyl-4-hydroxyl benzyl diethyl phosphoric acid, thermal oxidation stabilizer 618 chemical names are distearyl pentaerythritol diphosphite, thermal oxidation stabilizer DSTP, and chemical name is a kind of or its combination in the thio-2 acid octadecyl ester.The principle of the invention is that the smell remover that adds is the molecular screen material of a kind of micropore size greater than 10 dusts, the micropore that can preestablish and be evenly distributed by pore size in the molecular sieve, can effectively reduce the smell of polypropylene material, and other intermediate molecular weight additives that add simultaneously in the material are not played adsorption simultaneously, to other characteristics of material, can not exert an influence as thermo-oxidative stability etc.
The chemical formula of described molecular sieve is: Na
86[(AlO
2)
86(SiO
2)
106] XH
2O.
On the such scheme basis, described polypropylene is different mobile high crystallization homo-polypropylene and block copolymerization propylene, consumption is 50-90%, wherein the comonomer of block copolymerization propylene is common is ethene, its content in the scope of 4-10mol%, polyacrylic melt flow rate (MFR) (230 ℃ * 2.16kg) be 5-50g/10min, more commonly used is 5-30g/10min, the degree of crystallinity of high-crystallinity polypropylene is more than 70%, and degree of isotacticity is greater than 99%.
In order to improve the intensity of product, described talcum powder particle diameter is the 1-10 micron.
On the such scheme basis,
For improving the reinforced effects of glass fibre, described toughner poe is a kind of multipolymer of ethylene-octene, and density is 0.88-0.90g/cm
3, melting index is 1-50g/10min.
The preparation method of a kind of low odor polypropylene composite material of the present invention is as follows:
(1) weighs raw material by claim 1 prescription;
(2) polypropylene, talcum powder, molecular sieve, thermo-stabilizer DSTP, thermo-stabilizer 3114 thermo-stabilizers 618 were done in super mixer mixed 3-5 minute;
(3) raw materials mixed is placed dual-screw-stem machine through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Advantage of the present invention is:
1, the present invention has used effective smell to remove system, and obtained matrix material has the characteristic of low smell.
2, the polypropylene composite material of the prepared low smell of the present invention is when guaranteeing the low odor property of material, every physical and mechanical property excellence of material.
3, the preparation technology of the polypropylene composite material of the low smell of the present invention's proposition is simple, cost is low.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
The polypropylene composite material of a kind of low smell of the present invention adds a kind of smell remover, and it is made up of the raw material of following weight percent (%):
Polypropylene 55-95
Talcum powder 0-40
Molecular sieve 0.5-5
Toughner poe 0-10
Thermo-stabilizer DSTP 0.3-3.0
In embodiment and Comparative Examples composite-material formula, polypropylene is different mobile high crystallization homo-polypropylene and block copolymerization propylene, and consumption is 50-90%.Wherein the comonomer of block copolymerization propylene is common is ethene, its content is in the scope of 4-10mol%, polyacrylic melt flow rate (MFR) (230 ℃ * 2.16kg) be 5-50g/10min, more commonly used is 5-30g/10min, the degree of crystallinity of high-crystallinity polypropylene is more than 70%, and degree of isotacticity is greater than 99%; Described talcum powder particle size range is the 1-10 micron; Described molecular sieve is a kind of alkali metal aluminosilicate powder of sodium type crystal structure, and chemical formula is Na
86[(AlO
2)
86(SiO
2)
106] XH
2O, diameter of particle require greater than 200 orders, and the microporous molecular sieve aperture requires greater than 10 dusts; Described toughner poe is a kind of multipolymer of ethylene-octene, and density is 0.88-0.90g/cm
3, melting index is 1-50g/10min; Thermal oxidation stabilizer 3114 produces for Ciba company, and trade names are Irganox 3114, and chemical name is 3,5-di-tert-butyl-4-hydroxyl benzyl diethyl phosphoric acid; Thermal oxidation stabilizer 618 produces for GE company, and trade names are Weston 618, and chemical name is a distearyl pentaerythritol diphosphite; Thermal oxidation stabilizer DSTP is that Britain ICE company produces, and trade names are Negonox DSTP, and chemical name is the thio-2 acid octadecyl ester;
Embodiment 1
Polypropylene 53.65%, talcum powder 40%, molecular sieve 5%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 2
Polypropylene 55.65%, talcum powder 40%, molecular sieve 3%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 3
Polypropylene 56.65%, talcum powder 40%, molecular sieve 2%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 4
Polypropylene 57.65%, talcum powder 40%, molecular sieve 1%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 5
Polypropylene 96.65%, molecular sieve 2%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 6
Polypropylene 91.65%, molecular sieve 2%, toughner POE5%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 7
Polypropylene 92.65%, molecular sieve 2%, toughner POE4%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 8
Polypropylene 93.65%, molecular sieve 2%, toughner POE3%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Embodiment 9
Polypropylene 94.65%, molecular sieve 2%, toughner POE2%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Comparative Examples 1
Polypropylene 98.65%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 6180.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Comparative Examples 2
Polypropylene 58.65%, talcum powder 40%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Comparative Examples 3
Polypropylene 56.65%, talcum powder 40%, 5 dust molecular sieves 2%, thermo-stabilizer DSTP0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Comparative Examples 4
Polypropylene 56.65%, talcum powder 40%, 4 dust molecular sieves 2%, thermo-stabilizer DSTP0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Comparative Examples 5
Polypropylene 56.65%, talcum powder 40%, gac 2%, thermo-stabilizer DSTP 0.9%, thermo-stabilizer 3,114 0.3%, thermo-stabilizer 618 0.15% were done in super mixer mixed 3-5 minute, afterwards, again in twin screw extruder through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
Performance evaluation mode and implementation standard:
With the particulate material of finishing granulation as stated above in 90～100 ℃ convection oven dry 2～3 hours in advance, and then the particulate material that drying is good carried out the injection molding sample preparation on injection moulding machine.
The tensile property test is undertaken by ISO 527-2, and specimen size is 150*10*4mm, and draw speed is 50mm/min; The bending property test is undertaken by ISO 178, and specimen size is 80*10*4mm, and rate of bending is 2mm/min, and span is 64mm; Simple beam impact strength is undertaken by ISO 179, and specimen size is 80*6*4mm, and notch depth is 1/3rd of a sample thickness; Heat-drawn wire is undertaken by ISO 75, and specimen size is 120*10*3.0mm, and load is 1.8MPa; The thermal-oxidative aging property of material is undertaken by ISO4577, and specimen size is 50*10*10mm, and probe temperature is 150 ℃; The odor property of material is tested by the PV3900 of Volkswagen, and sample mass is 40～60g, and the vessel content size is 1 liter; Material organic compound volatility is tested by self-defined standard, and sample mass is 10, and laying temperature is 100 ℃, and be 16 hours storage period.
Comprehensive mechanical performance is passed through the tensile strength of test gained, elongation at break, and modulus in flexure, the numerical value of thermal denaturation temperature and shock strength is passed judgment on; The thermal-oxidative aging property of material is passed judgment on according to the heat oxygen aging resistance time length of measuring by standard: the time is long more, and the heatproof air aging performance of material is good more; The odor property of material is divided into according to standard code: 1 grade: odorlessness, 2 grades: scent of, but non interference smell, 3 grades: obvious smell is arranged, but the non interference smell, 4 grades: the interference smell is arranged, 5 grades: strong interference smell is arranged, 6 grades: insupportable smell is arranged; Material organic compound volatility is according to formula: volatility %=(material initial mass-material is transferred the quality of postpone in standard code)/material initial mass * 100%, calculate, the high more expression material of the numerical value organic compound volatility of calculating gained is big more, otherwise then more little.
The prescription of embodiment 1-10 and Comparative Examples 1-7 and every The performance test results be each table as follows, table 1 embodiment 1-4 prescription and material property table, table 2 embodiment 5-9 prescription and material property table, table 3 Comparative Examples 1-5 prescription and material property table.
Table 1 embodiment 1-4 prescription and material property table
| The matrix material title | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Polypropylene (%) | 53.65 | 55.65 | 56.65 | 57.65 |
| Talcum powder (%) | 40 | 40 | 40 | 40 |
| 13 dust molecular sieves (%) | 5 | 3 | 2 | 1 |
| 618(％) | 0.15 | 0.15 | 0.15 | 0.15 |
| 3114(％) | 0.3 | 0.3 | 0.3 | 0.3 |
| DSTP(％) | 0.9 | 0.9 | 0.9 | 0.9 |
| Unnotched impact strength (kJ/m 2) | 15 | 18 | 22 | 22.5 |
| Notched Izod impact strength (kJ/m 2 | 1.5 | 1.8 | 2.2 | 2.3 |
| Tensile strength (MPa) | 33 | 32 | 31.5 | 31 |
| Elongation at break (%) | 4.0 | 4.2 | 5.3 | 5.5 |
| Flexural strength (MPa) | 51 | 51 | 50.5 | 49 |
| Modulus in flexure (MPa) | 4100 | 4060 | 4040 | 3980 |
| Thermal-oxidative aging property (H) | 1350 | 1420 | 1460 | 1460 |
| Oder levels | 2.5 | 2.5 | 3.0 | 3.5 |
| Organic compound volatility (%) | 0.20 | 0.23 | 0.34 | 0.46 |
Table 2 embodiment 5-9 prescription and material property table
| The matrix material title | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| Polypropylene (%) | 96.68 | 91.65 | 92.65 | 93.65 | 94.65 |
| Talcum powder (%) | - | - | - | - | - |
| 13 dust molecular sieves (%) | 2 | 2 | 2 | 2 | 2 |
| Toughner poe | - | 5 | 4 | 3 | 2 |
| 618(％) | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| 3114(％) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| DSTP(％) | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Unnotched impact strength (kJ/m 2) | 74 | Constantly | Constantly | Constantly | 68 |
| Notched Izod impact strength (kJ/m 2 | 8.5 | 18 | 16 | 13.5 | 10.6 |
| Tensile strength (MPa) | 27.3 | 22 | 23 | 24.7 | 26.2 |
| Elongation at break (%) | 42 | 116 | 97 | 86 | 55 |
| Flexural strength (MPa) | 34.6 | 31 | 32 | 32.4 | 33.2 |
| Modulus in flexure (MPa) | 1890 | 1660 | 1710 | 1790 | 1820 |
| Thermal-oxidative aging property (H) | 1610 | 1600 | 1620 | 1590 | 1620 |
| Oder levels | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| Organic compound volatility (%) | 0.38 | 0.40 | 0.39 | 0.41 | 0.43 |
Table 3 Comparative Examples 1-5 prescription and material property table
| The matrix material title | Comparative Examples 1 | Comparative Examples 2 | Comparative Examples 3 | Comparative Examples 4 | Comparative Examples 5 |
| Polypropylene (%) | 98.65 | 58.65 | 56.65 | 56.65 | 56.65 |
| Talcum powder (%) | - | 40 | 40 | 40 | 40 |
| 13 dust molecular sieves (%) | - | - | - | - | - |
| 5 dust molecular sieves (%) | - | - | 2 | - | - |
| 4 dust molecular sieves (%) | - | - | 2 | ||
| Gac (%) | - | - | - | - | 2 |
| 618(％) | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| 3114(％) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| DSTP(％) | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Unnotched impact strength (kJ/m 2) | Constantly | 23 | 22.4 | 22.2 | 19.8 |
| Notched Izod impact strength (kJ/m 2 | 15 | 2.4 | 2.3 | 2.1 | 1.8 |
| Tensile strength (MPa) | 26 | 33 | 32 | 32 | 32 |
| Elongation at break (%) | 95 | 5.4 | 5.3 | 5.5 | 5.5 |
| Flexural strength (MPa) | 34 | 51 | 50.5 | 51 | 52 |
| Modulus in flexure (MPa) | 1850 | 4010 | 4040 | 4050 | 3960 |
| Thermal-oxidative aging property (H) | 1650 | 1480 | 1450 | 1470 | 260 |
| Oder levels | 4.0 | 4.5 | 4.5 | 4.5 | 4.5 |
| Organic compound volatility (%) | 0.935 | 1.23 | 1.06 | 1.11 | 1.11 |
Can see that with the contrast of Comparative Examples 1,2 molecular screen material is to the influence of material odor property from embodiment 1-4 and 5-9.The interpolation of molecular screen material makes the smell of PP material significantly reduce, and the content of organic compound volatile matter also has minimizing in various degree in the while material.The generation explanation molecular screen material of this phenomenon has the good adsorption effect to the volatile matter that produces smell.The uniform ultra-fine micropore that distributes in the molecular screen material can well be anchored at these volatile matters that produce smell in the middle of the micropore, so show good odor property of PP material and the low characteristic of organic volatile content firmly.
It is about 2% the most suitable to it can also be seen that from embodiment 1-4 the addition of molecular sieve is controlled at.At this moment, material not only possesses good odor property and the low characteristic of organic volatile content, and the basic physical and mechanical property of material might as well simultaneously.
Can see from embodiment 5-9, the PP material added molecular screen material as the smell remover after, if need carry out further toughness reinforcing processing, then then can by an amount of toughner poe of interpolation to the PP material.
As can be seen, the micropore size of molecular screen material is to the influence of the removal effect of ABS smell from the contrast of embodiment 3 and Comparative Examples 3-4.The aperture of molecular screen material micropore is too small, as Comparative Examples 3-4, does not then have the ideal adsorption effect, prepared PP material odor property extreme difference.By the contrast of embodiment 2 with Comparative Examples 5, though being described, traditional activated carbon of sorbent can reduce the odor property of PP material equally, its influence to the basic physical and mechanical property of material is very big, does not have practical value substantially.Simultaneously because the micropore size size in the middle of the gac differs very big, the maximum diameter of hole can reach 1000 dusts, therefore, in melt extruding in the process of PP material, the various auxiliary agents such as stablizer of the intermediate molecular weight that may most of be added also are adsorbed simultaneously, cause other physics-chem characteristics of material also to lose greatly.The contrast of the heatproof air aging performance of this heatproof air aging performance by table 3 Comparative Examples 5 and other each embodiment and Comparative Examples can be known and see.
Claims (6)
1. the polypropylene composite material of a low smell is characterized in that, adds a kind of smell remover, and it is made up of the raw material of following weight percent (%):
Polypropylene 55-95
Talcum powder 0-40
Molecular sieve 0.5-5
Toughner poe 0-10
Thermo-stabilizer DSTP 0.3-3.0
Wherein, described molecular sieve is a kind of alkali metal aluminosilicate powder of sodium type crystal structure, and diameter of particle is not less than 200 orders, and the microporous molecular sieve aperture is not less than 10 dusts; Described thermo-stabilizer is at least 3, a kind of or its combination in 5-di-tert-butyl-4-hydroxyl benzyl diethyl phosphoric acid, distearyl pentaerythritol diphosphite, the thio-2 acid octadecyl ester.
2. a kind of low odor polypropylene composite material according to claim 1, it is characterized in that, described polypropylene is different mobile high crystallization homo-polypropylene and block copolymerization propylene, consumption is 50-90%, wherein the comonomer of block copolymerization propylene is common is ethene, its content is in the scope of 4-10mol%, polyacrylic melt flow rate (MFR) (230 ℃ * 2.16kg) be 5-50g/10min, more commonly used is 5-30g/10min, the degree of crystallinity of high-crystallinity polypropylene is more than 70%, and degree of isotacticity is greater than 99%.
3. a kind of low odor polypropylene composite material according to claim 1 is characterized in that, described talcum powder particle diameter is the 1-10 micron.
4. a kind of low odor polypropylene composite material according to claim 1 is characterized in that, the chemical formula of described molecular sieve is Na
86[(AlO
2)
86(SiO
2)
106] XH
2O.
5. a kind of low odor polypropylene composite material according to claim 1 is characterized in that, described toughner poe is a kind of multipolymer of ethylene-octene, and density is 0.88-0.90g/cm
3, melting index is 1-50g/10min.
6. the preparation method of a kind of low odor polypropylene composite material according to claim 1 is as follows:
(1) weighs raw material by claim 1 prescription;
(2) polypropylene, talcum powder, molecular sieve, thermo-stabilizer DSTP, thermo-stabilizer 3114 thermo-stabilizers 618 were done in super mixer mixed 3-5 minute;
(3) raw materials mixed is placed dual-screw-stem machine through melt extruding, granulation, its technology is: 200～210 ℃ in a district, 210～220 ℃ in two districts, 210～220 ℃ in three districts, 205～215 ℃ in four districts; The residence time is 1-2 minute, and pressure is 12-18Mpa.
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