CN1631960A - Talc powder filled polypropylene with high rigidity, high toughness and high scratch resistance and method for preparing same - Google Patents
Talc powder filled polypropylene with high rigidity, high toughness and high scratch resistance and method for preparing same Download PDFInfo
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- CN1631960A CN1631960A CN 200410084709 CN200410084709A CN1631960A CN 1631960 A CN1631960 A CN 1631960A CN 200410084709 CN200410084709 CN 200410084709 CN 200410084709 A CN200410084709 A CN 200410084709A CN 1631960 A CN1631960 A CN 1631960A
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Abstract
The invention relates to high molecular processing field compound material, especially a high molecular organic sillicon elastomer filled with talcum powder agglomerate, with outstanding rigidity and resistance to heat and its preparing method, which can be applied in auto and toner field, such as pate of tenacity, door, plate of augxiliary tenacity, deconating stick and other polypropylene inside and outside automobile. The invention is comprised of high molecular organic sillicon elastomer and talcum powder agglomerate with high crystal and the percentages of each component are: high molecular organic sillicon elastomer 60-90, talcum powder agglomerate 10-40, scratch 3-10, dust 0.1-1.0, of talcum powder agglomerate 0.2-1.5, 0.05-1.0. The preparing method is: mix the high molecular organic sillicon elastomer, talcum powder agglomerate, dust, of talcum powder agglomerate and in, then place then into to form the particles. Its advantage is that, keeping the tenacity of polypropylene, the rigidity has also been increased, balancing its tenacity and rigidity, as well as its resistance to scratch, it can satisfy the requirements of elements in auto; besides, it also reduces dust, benefiting for protecting the work environment.
Description
Technical field
The present invention relates to a kind of high rigidity, the mar-proof talc powder filled polypropylene of high tenacity and preparation method thereof, the material of preparation can be used for automobile and field of household appliances, as inner and outer decorative parts of automobile such as the dashboard of car, door-plate, door shield, auxiliary fasia console, glove box, edge lists, belong to the Process Technology of Polymer technical field.
Background technology
Dashboard, door-plate etc. are parts important in the car interior trim, and its shape and condition of surface are car keys whether attractive in appearance.Past mainly adopts the method for additional fabric on instrument board framework to increase aesthetic feeling, because complete processing relative complex, price is higher, the mode of not covered skin in recent years gradually replaces, but the surface to dashboard has proposed higher requirement, wherein important is exactly mar-proof performance, and therefore having formulated some standards examines associated materials in motor corporation.Improve the main terms of settlement of mar-proof performance and be the surface hardness that improves part, as adopt the higher relatively material of some hardness such as ABS, PC/ABS alloy, MODIFIED PP O etc., but these material relative prices are also higher.Then in some family-sized cars adopt rubber toughened talc powder filled polypropylene, but the mar-proof performance that how to improve material then is the key of this class material of exploitation more.
The polyacrylic mar-proof performance of relevant raising has some reports, has proposed some terms of settlement, fills enhancing, improves polyacrylic degree of crystallinity, adds the method that some contain organo-siloxane as polypropylene.
Foreign patent WO02051934 mentions a kind of organosilicon grafted and modified polyethylene and polypropylene and talcum powder and carries out blend, and along with the increase of grafting PE consumption, the anti-scratch performance of modified polypropene is significantly improved, and its suitable consumption is 5-10 part; WO02051933 relates to a kind of method is improved material by the mode that improves material modified hardness with the alternative part talcum powder of mica anti-scratch performance; Japanese patent laid-open 6-220270 is reported in the tenacity-increased profax, improves the purpose that material surface hardness reaches the raising anti-scratch performance by adding nucleator, finds the anti-scratch performance of the also favourable raising material of increase of rubber consumption simultaneously; Thereby U.S. Pat 2002/0077396 proposes the degree of crystallinity of polyacrylic degree of isotacticity raising material and solves anti-scratch performance; US2002/0082328 proposes the anti-scratch performance that the crosslinked method of a kind of MATERIALS ' DYNAMIC improves material; US5585420 and US5731376 have proposed the anti-scratch performance that a kind of method that adds high molecular weight siloxane improves talc powder filled polypropylene, but not mentioned rubber toughened.
Polypropylene has that processing characteristics is good, toughness is high, the advantage of anti-gasoline and pharmaceutical chemicals, and light weight, inexpensive is widely used in the shell of inner and outer decorative parts of automobile, electronics and household electronic products etc. simultaneously.But polypropylene also have heat-resisting poor, rigidity is low, scratch-resistant difference and the relatively poor shortcoming of low temperature impact properties, improve the toughness of polypropylene material usually by the method that adds rubber, but rigidity decreases simultaneously, is difficult to reach rigidity and flexible balance.
Summary of the invention
The object of the invention is that purpose provides that a kind of anti-zoned trace, outward appearance are beautiful, rigidity and toughness reach balance, have excellent machinability, the high rigidity that production cost is low, high tenacity, mar-proof talc powder filled polypropylene and preparation method thereof.
For achieving the above object, a kind of high rigidity of the present invention, high tenacity, mar-proof talc powder filled polypropylene, with the master batch that talcum powder and rubber blend are in advance made, it is made by following raw materials in weight portion:
A. polypropylene 50-80
B. talcum powder master batch 20-50
C. high molecular silicone elastomer 0.5-5
D. stablizer 0.1-1.0
E. talcum powder surface passivation agent 0.2-1.5
F. processing aid 0.05-1.0
G. toner 0.3-2.0
A+b is 100 weight parts in the above-mentioned prescription, and other auxiliary agent is a weight part.The present invention has developed a kind of production technology of talcum powder master batch, when reducing the production scene dust, has improved the rigidity and the toughness of material significantly.
The preparation method is: earlier make master batch with talcum powder and rubber blend in advance, and then carry out blend with polypropylene and other component and make modified polypropene.
Described polypropylene can be the homo-polypropylene and the block copolymerization propylene of the moving property of various flows, can be single also can be blended, 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.
Described filler parent granule is talcum powder, rubber, and the mixture of processing aid, wherein the talcum powder particle size range is the 1-10 micron, consumption is 70-90, rubber consumption is 10-30, the processing aid consumption is the 0.5-3% of master batch consumption, here the rubber of using, principal item is the vinyl linear copolymer, typical products is ethylene-octene copolymer, ethylene-butene copolymer, wherein octene or butene content are 20-30%, melt flow rate (MFR) (190 ℃ * 2.16kg) be 0.2-10g/10min, density 0.86-0.88g/cm
3
Described polymer silicoorganic compound are dimethyl silicone rubber, and its molecular weight is 70-100 ten thousand.
Described stablizer is a kind of or its combination in thermal oxidation stabilizer and the photostabilizer, and thermal oxidation stabilizer is 1010 ([β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester) and Irganox PS 802 (thio-2 acid 2 stearyl ester); Photostabilizer is 770 (two (2,2,6,6-tetramethyl--4-piperidyl) sebate) and Chimassorb 944; Described talcum powder surface passivation agent is higher fatty acid, titanate coupling agent, aluminate coupling agent, silane coupling agent, is typically Resins, epoxy Araltide 7072; Described processing aid is an ethylene bis stearamide.
The preparation method of a kind of high rigidity, the mar-proof talc powder filled polypropylene of high tenacity:
(1) weighs raw material by weight ratio;
(2) polypropylene, filler master batch, high molecular silicone elastomer, stablizer, talcum powder surface passivation agent, processing aid and toner were mixed in homogenizer 10～20 minutes;
(3) mixed raw material is put into twin screw extruder, material residence time in screw rod is 1～2 minute, and temperature is in the screw rod: 185～195 ℃ in a district, 190～210 ℃ in two districts, 190～210 ℃ in three districts, 195～215 ℃ in four districts; The twin screw extruder rotating speed is 300-700 rev/min;
(4) discharging melt extrudes in twin screw extruder, extrudes postcooling, drying, pelletizing and gets product.
Advantage of the present invention is:
1. the present invention has improved polyacrylic anti-scratch performance, uvioresistant performance and resistance toheat, and the toughness of material and rigidity have reached good balance, can satisfy the requirement of automobile component to material.
2. because the present invention has adopted talcum powder master batch manufacturing technology, keeping the modified polypropene flexible simultaneously, the rigidity of material has obtained increasing substantially, the mar-proof performance and the processing characteristics of material have all obtained obvious improvement, can be in the comparatively high temps bottom knockout, improve shaping efficiency greatly, cut down finished cost.
3. the talcum powder master batch of the present invention's use improves the environment of production scene greatly, reduces dust, reduces the quality fluctuation of product simultaneously.
4. the various materials that use among the present invention are commercially available general commodity, and wide material sources do not have strict demand to producer.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
A kind of high rigidity of the present invention, high tenacity, mar-proof talc powder filled polypropylene, with the master batch that talcum powder and rubber blend are in advance made, it is made by following raw materials in weight portion:
A. polypropylene 50-80
B. talcum powder master batch 20-50
C. high molecular silicone elastomer 0.5-5
D. stablizer 0.1-1.0
E. talcum powder surface passivation agent 0.2-1.5
F. processing aid 0.05-1.0
G. toner 0.3-2.0
A+b is 100 weight parts in the above-mentioned prescription, and other auxiliary agent is a weight part.
The polypropylene of mentioning among the present invention is the blend of one or more isotatic polypropylene, these isotatic polypropylene comprise homo-polypropylene and co-polypropylene, wherein co-polypropylene is divided into random copolymerization propylene and block copolymerization propylene again, and comonomer is that ethene, butylene are to 20 carbon olefins.Typical comonomer is ethene in the co-polypropylene that uses in the present invention, and its content is no more than 15mol%, the more common 5mol% that is no more than.
The polypropylene that uses among the present invention can adopt different polymerization processs to obtain, as suspension polymerization and solution polymerization, the state of propylene monomer can be gas phase or slurries attitude, the catalyzer that uses is common to be Ziegler-Natta type, certainly comprise that also other any catalyzer can prepare the polypropylene of high regularity structure, its degree of isotacticity should be greater than 95%.
The polyacrylic flowability of using among the present invention melt flow rate (MFR) (MFR) commonly used represents that its test condition is 230 ℃ * 2.16kg, and melt flow rate (MFR) is inversely proportional to polyacrylic molecular weight, and promptly the polypropylene molecule amount is big more, and flowability is poor more, and MFR is more little.Select the MFR size, mainly need to consider physics, the mechanical property of moulding processability and material, MFR is too small, and flowability is too poor, is unsuitable for injection molding, and MFR is excessive, and polyacrylic toughness is too poor, and material is too crisp.Polyacrylic MFR scope is 0.5-100g/10min, and more common MFR scope is 0.5-50g/10min.
The talcum powder master batch of mentioning among the present invention mainly is made up of talcum powder, rubber and processing aid.Wherein, amount of filler is 70-90wt%, and rubber consumption is 10-30wt%, and the processing aid consumption is 0.5-3%.
Also available other material substitution of the talcum powder of using in the master batch, comprise: lime carbonate, potter's clay, mica, glass microballon, glass fibre, carbon black etc., common is lime carbonate and potter's clay, especially the talcum powder of sheet structure is more common in modified polypropene, length/thickness rate (L/T) is about 200, and particle size range is the 1-10 micron.In order significantly to improve polyacrylic rigidity, talcous consumption generally is not less than 10% in modified polypropene, and is too low, and the rigidity of material is too poor; But amount of talc is also unsuitable too much, as surpassing 40%, then can the polyacrylic processing characteristics of remarkably influenced, and therefore general amount of talc is 10-35wt%, more common is 15-25wt%.
The rubber of using in the master batch, mainly in order to improve the toughness of modified polypropene, the while is as the carrier of talcum powder master batch.The rubber of mentioning among the present invention, for thermal ageing and the weather resistance that guarantees that material is good, generally be the ethene copolymer of saturated structures, this class rubber mainly contains ethylene-propylene copolymer (EPR), ethylene-butene copolymer, styrene copolymer (SEBS), ethylene-styrene copolymer, ethylene-octene copolymer (POE) etc., the POE of the metallocene catalysis preparation that particularly occurs in recent years is good because of its toughening effect, good processability is then more common, in order obviously to improve polyacrylic toughness, low-temperature flexibility particularly, except that paying special attention to select the polypropylene kind, the selection of rubber consumption is also extremely important, by adjusting rubber and amount of filler proportioning, can make the modified polypropene toughness and the rigidity of preparation reach balance, rubber consumption is 5-25wt% among the present invention, and more common is 8-15wt%.
The processing aid of using in the master batch, main in order to improve the dispersion of filler in rubber, typical products is saturated or undersaturated fatty amide, as ethylene bis stearamide.
Compare with polypropylene, the adding of rubber and filler, the anti-scratch performance variation of material, in order to improve this performance, method commonly used has the surface hardness that improves modified polypropene and adds some anti-zoned trace agent.The anti-zoned trace agent of adopting among the present invention is a kind of general high molecular silicone elastomer, dimethyl silicone rubber, its molecular weight ranges is 70-100 ten thousand, and molecular weight is low excessively, and is poor with the polymer phase capacitive, cause material modified over-all properties too poor, therefore molecular weight is too high, and cost is too high during polymerization, and the amount ranges of anti-zoned trace agent is for being 0.5-5.0 by weight, as: 0.5,0.8,1.0,1.5,2.0,2.5,3.0,4.0,4.5,5.0, the optimum consumption is 1.5-3.0.
Owing to have tertiary carbon atom in the polypropylene molecule, easier to be more aging than polyethylene, particularly under the effect of high temperature and UV-light, the polypropylene that does not add stablizer is in a short time just with embrittlement, lose use value, so the adding of stablizer is even more important to modified polypropene.General polyacrylic stabilising system comprises: phenols primary antioxidant, phosphorous acid esters or thioesters class are worked in coordination with oxidation inhibitor, acid absorber, UV light absorber, hydrogen peroxide decomposition agent etc.
In polyacrylic stabilising system, the phenols primary antioxidant is common to be had, the Irganox 1010 of Switzerland Ciba company (four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester) and Irganox1076 (2,6-two (1-phenyl) ethyl-4-nonylphenol), wherein 1010 is more commonly used, and consumption is generally 0.1-1.0%, and more commonly used is 0.1-0.5%.
Phosphorous acid esters and thioesters class auxiliary antioxidant, with above-mentioned primary antioxidant synergy is arranged, common kind has: the Irgafos 168 (three (2 of Switzerland Ciba company, phosphorous acid ester) and Irganox PS 802 (thio-2 acid 2 stearyl ester) the 4-di-tert-butyl-phenyl), because the former is easy to hydrolysis in talc powder filled polypropylene, so the latter is more commonly used.Its consumption is 0.1-1.0%, and more commonly used is 0.1-0.5%.
In polyacrylic stabilising system, also need add acid absorber, common kind has stearates, and this class material plays the effect of internal lubricant simultaneously, and as calcium stearate and Zinic stearas etc., its consumption is 0.05-0.5%, and more commonly used is 0.05-0.2%.
In order to improve the weather resistance of modified polypropene, often need to add photostabilizer.Photostabilizer commonly used is divided into according to the mechanism of action: UV light absorber, quencher, hydrogen peroxide decomposition agent and radical scavenger, common several photostabilizers are also used the weather resistance that can improve material by a relatively large margin.Ultraviolet absorbers in the composition has; Benzophenone, phenyl methyl ketone amine, benzotriazole category, triazines, wherein PP the most common be benzophenone and phenyl methyl ketone amine; Above-mentioned ultraviolet absorbers consumption is at 0.1-1.0%, and the most suitable consumption is 0.1-0.5%; Typical UV light absorber product is the Sanduvor PR-25 and the Sanduvor VSU of Switzerland Clariant company.
Free radical quencher in the composition has: hindered amines and nickel huge legendary turtle compound class, the latter now seldom uses because of environmental issue.Common hindered amine light stabilizer has the Tinuvin 770 (two (2 of Switzerland Ciba company, 2,6, sebate) and Chimassorb 944 (a kind of high molecular weight hindered amine light stabilizer 6-tetramethyl--4-piperidyl), it has good heat endurance, resistant to extraction, and lower volatility and transport property have good consistency with polypropylene simultaneously), its consumption is 0.1-2.0 (mass parts), and the most suitable consumption is 0.1-1.0 (mass parts).In polyacrylic smooth stabilising system, be generally multiple photostabilizer and usefulness, its total consumption is no more than 2%.
General packing specific area is than higher, easily adsorb the various low molecule auxiliary agent that adds, particularly oxidation inhibitor and anti UV agent, the high-molecular weight silicone elastomer that we are added is also influential simultaneously, how to handle filler and be that exploitation is mar-proof, the key of uvioresistant, rubber toughened talc powder filled polypropylene.Except that adopting some conventional surface treatment methods, as adopt higher fatty acid, titanate coupling agent, aluminate coupling agent and silane coupling agent, also need add some surface passivation agent such as some epoxy compoundss, Resins, epoxy is typically arranged, patent of the present invention adopts the solid epoxy Araltide 7072 of Switzerland Ciba company, its consumption is 0.2-1.5%, and the optimum consumption is 0.5-1.0%.
Because automotive upholstery mostly is light goods, therefore in prescription, need to add some pigment, as cream-coloured or grey, in general, the consumption of pigment is 0.3-2.0%, optimum dose is 0.5-1.0%, according to the variation of product colour and slightly different.
The present invention has contrasted multiple homopolymerization or copolymerization PP, wherein be typical for melt flow rate (MFR) and be the block copolymerization propylene about 10g/10min, its ethylene content is 4.5%, degree of isotacticity is 96%, many in the world companies all can produce this product, so wide material sources, the present invention adopts the co-polypropylene M700R of Kingsoft, Shanghai petrochemical industry limited-liability company.
The talcum powder that uses in the invention produces as Guangxi China, and its size is 1250 orders that sieve, and whiteness is more than 95%.
The rubber that uses in the invention is ethylene-octene copolymer, is Dupont-the Dow Chemical Company's product, and the trade mark is 8150, and its octene content is 25%, density 0.868g/cm
3, melt flow rate (MFR) (190 ℃ * 2.16kg) be 0.5g/10min.
The high-molecular weight organo-silicone rubber that uses among the present invention is vinylsiloxane rubber, molecular weight about 700,000, be the commercially available prod, for the ease of processing and improving its dispersiveness, we adopt special technology to make the organosilicon master batch, and organosilyl effective content is 50wt%.
The various auxiliary agents that use among the present invention are: acid-acceptor is calcium stearate; Talcum powder surface passivation agent is the Resins, epoxy 7072 that Switzerland Ciba company produces; Thermal oxidation stabilizer is the Irganox 1010 ([β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester) and the IrganoxPS 802 (thio-2 acid 2 stearyl ester) of Switzerland Ciba company; Photostabilizer is the Tinuvin770 (two (2,2,6,6-tetramethyl--4-piperidyl) sebate) and the Chimassorb 944 of Switzerland Ciba company; Processing aid is an ethylene bis stearamide.
Performance test
(1) mar-proof performance test: the injection molding size of sample is 150 * 100 * 3.2mm, with hand-held hardness test pen load is 10N, the nib diameter is that 0.75mm carries out scratch test on the model surface, cut is 2mm at interval, each stroke of vertical and horizontal 10-20 bar line, the color and luster that grid material is drawn in the color measurement system testing of adopting Japanese Minolta company to produce changes, the Δ L value of recording materials, thereby the anti-scratch performance of discriminating material.
(2) melt flow rate (MFR) (MFR) is measured: undertaken by ISO 1183 standards, think in Shanghai and reach and carry out 230 ℃ of probe temperatures, load 2.16kg on the fusion index instrument of scientific instrument company;
(3) tensile property is measured: undertaken by ISO 527 standards, carry out on the German Zwick Z010 of company universal testing machine, rate of extension is 50mm/min;
(4) bending property is measured: undertaken by ISO 178 standards, on the German Zwick Z010 of company universal testing machine, carry out, and span 64mm, speed 2mm/min, modulus in flexure is calculated and is undertaken by tangential way;
(5) impact property is measured: undertaken by ISO 179 standards, carry out on the impact experiment machine of German Zwick company, batten is 80 * 10 * 4mm, v-notch, and bottom radius is 0.25mm.
(6) hardness test: carry out on the hardness-testing device of German Zwick company by ISO 2039-1 standard, loading is 358N, 30 seconds readings.
(7) heat-drawn wire: undertaken by ISO 75 standards, carry out on the HDT 300 that Italian Ceast company produces, batten is 120 * 10 * 4, loads to be 0.45Mpa.
(8) weather resistance test: test apparatus is the proofing box of U.S. ATLAS Ci3000 type xenon lamp aging.Test conditions: 100 ± 3 ℃ of blackboard temperatures, 65 ± 3 ℃ of spin manifold temperatures, casing relative humidity (20 ± 10) %, exposure intensity (300～400nm) 60w/m
2, filter system Xenochrom 300, irradiation time 240 hours.Test sample plate colour-change journey Δ E and old firm index, GB250-1955 characterizes by standard.
Preparation method of the present invention: at first prepare the talcum powder master batch.Talcum powder, rubber and processing aid are mixed in rubber internal mixer, and the temperature of Banbury mixer is set at 80 ℃, about 20 minutes of mixing time, and the Banbury mixer rotating speed is 15rpm.Granulation in single screw extrusion machine then, extruder temperature are set at 60 ℃, 70 ℃, 80 ℃, 80 ℃, 80 ℃, and screw speed is 90rpm.Through this granulation, talcous water content reduces significantly, and the talcum powder particle is dispersed in the rubber particles.
Embodiment 1-3 and comparative example 1-3 have contrasted the method that adopts the talcum powder master batch and have directly added the influence of the method for talcum powder and rubber to modified polypropylene material mechanical property and mar-proof performance.Basic recipe in the experiment is as follows: the major ingredient prescription sees Table 1, and auxiliary formula is: silicon rubber master batch 2.0,1010 is 0.1, and PS802 is 0.3, and EBS is 0.2, and calcium stearate 0.1,770 is 0.2,944 to be 0.2, and cream-coloured toner is 1.2.
The preparation method of embodiment and comparative example 1-3 is as follows:
(1) weighs raw material by weight ratio;
(2) polypropylene, talcum powder master batch (or filler and rubber), high molecular silicone elastomer, stablizer, talcum powder surface passivation agent, processing aid and toner were mixed in homogenizer 1.5 minutes;
(3) mixed raw material is put into twin screw extruder (diameter 34mm, length-to-diameter ratio 40/1), material residence time in screw rod is 1.5 minutes, and temperature is in the screw rod: 190 ℃ in a district, 205 ℃ in two districts, 210 ℃ in three districts, 210 ℃ in four districts; It is 300 rev/mins that twin screw squeezes the forcing machine rotating speed;
(4) discharging melt extrudes in twin screw extruder, extrudes postcooling, drying, pelletizing and gets product.
(5) will extrude pellet and on 100 tons of sea day injection moulding machines, prepare sample.The injection moulding machine temperature is set at 200 ℃, and 220 ℃, 230 ℃, melt temperature is 230 ℃, and the forming process time is 60 seconds.
Table 1 embodiment 1-3 and comparative example 1-3
| Embodiment | Comparative example | |||||
| ??E-1 | ??E-2 | ??E-3 | ????C-1 | ????C-2 | ????C-3 | |
| M700R | ??70 | ??75 | ??80 | ????70 | ????75 | ????80 |
| C7030 | ??30 | ??25 | ??20 | |||
| talc?1250 | ????21 | ????17.5 | ????14 | |||
| 8150 | ????9 | ????7.5 | ????6 | |||
| Auxiliary dosage | ??4.3 | ??4.3 | ??4.3 | ????4.3 | ????4.3 | ????4.3 |
| Density, g/cm 3 | ??1.035 | ??1.015 | ??0.9947 | ????1.04 | ????1.02 | ????1.0 |
| Melt flow rate (MFR), 230 ℃ * 2.16kg, g/10min | ??12.5 | ??12.3 | ??13 | ????12.5 | ????10.2 | ????10.3 |
| Tensile yield strength, MPa | ??24.0 | ??24.2 | ??24.7 | ????22.0 | ????21.7 | ????24 |
| Flexural strength, MPa | ??33.55 | ??34.87 | ??35.49 | ????30 | ????33 | ????36 |
| Modulus in flexure, MPa | ??1871 | ??1833 | ??1771 | ????1550 | ????1450 | ????1410 |
| Notched Izod impact strength, kJ/m 2 | ??35.5 | ??21.4 | ??25.1 | ????28 | ????10.0 | ????10 |
| Ball indentation hardness, MPa | ??63.4 | ??62.5 | ??61 | ????60 | ????58 | ????56 |
| Mar-proof performance (Delta L) | ??0.8 | ??0.5 | ??0.4 | ????1.2 | ????1.0 | ????0.7 |
Illustrate: the C7030 proportioning is talcum powder 70,8,150 30, ethylene bis stearamide 0.5
As can be seen from Table 1, under polypropylene, talcum powder and rubber consumption and the identical situation of kind, the modified polypropene modulus in flexure and the shock strength that adopt the mode of talcum powder master batch to make have all obtained obvious improvement, simultaneously because the hardness of material increases mar-proof performance also has clear improvement.
Claims (6)
1. a high rigidity, the mar-proof talc powder filled polypropylene of high tenacity comprise the talcum powder master batch that talcum powder and blend rubber are made, and it is made by following raw materials in weight portion:
A. polypropylene 50-80
B. talcum powder master batch 20-50
C. high molecular silicone elastomer 0.5-5
D. stablizer 0.1-1.0
E. talcum powder surface passivation agent 0.2-1.5
F. processing aid 0.05-1.0
G. toner 0.3-2.0
Wherein, a+b is 100 weight parts in the above-mentioned prescription, the polyacrylic melt flow rate (MFR) of described polypropylene (230 ℃ * 2.16kg) be 5-50g/10min; Described talcum powder master batch is talcum powder, rubber, and the mixture of processing aid, wherein the talcum powder particle size range is the 1-10 micron, by weight, consumption is 70-90, rubber consumption is 10-30, and the processing aid amount is the 0.5-3% of master batch total amount, described polymer silicoorganic compound, be dimethyl silicone rubber, its molecular weight is 70-100 ten thousand; Described stablizer is a kind of or its combination in thermal oxidation stabilizer and the photostabilizer, and described thermal oxidation stabilizer is [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and thio-2 acid 2 stearyl ester; Described photostabilizer is two (2,2,6,6-tetramethyl--4-piperidyl) sebate and Chimassorb 944; Described talcum powder surface passivation agent is higher fatty acid, titanate coupling agent, aluminate coupling agent, silane coupling agent, a kind of or its combination among the Resins, epoxy Araltide 7072; Described processing aid is an ethylene bis stearamide.
2. a kind of high rigidity according to claim 1, the mar-proof talc powder filled polypropylene of high tenacity, it is characterized in that described polypropylene is different mobile homo-polypropylenes and a kind of or its combination in the block copolymerization propylene, wherein the comonomer of block copolymerization propylene is an ethene, its content in the scope of 4-10mol%, melt flow rate (MFR) (230 ℃ * 2.16kg) be 5-30g/10min.
3. a kind of high rigidity according to claim 1, the mar-proof talc powder filled polypropylene of high tenacity, it is characterized in that described rubber is the vinyl linear copolymer, comprise ethylene-octene copolymer, ethylene-butene copolymer, wherein octene or butene content are 20-30%, melt flow rate (MFR) (190 ℃ * 2.16kg) be 0.2-10g/l0min, density 0.86-0.88g/cm
3
4. a kind of high rigidity according to claim 3, the mar-proof talc powder filled polypropylene of high tenacity is characterized in that described talcum powder particle diameter is 0.5-10um, and rubber clone is an ethylene-octene copolymer, and wherein octene content is 25wt%.
5. the preparation method of a kind of high rigidity according to claim 1, the mar-proof talc powder filled polypropylene of high tenacity:
(1) weighs raw material by weight ratio;
(2) polypropylene, talcum powder master batch, high molecular silicone elastomer, stablizer, talcum powder surface passivation agent, processing aid and toner were mixed in homogenizer 10～20 minutes;
(3) mixed raw material is put into twin screw extruder, material residence time in screw rod is 1～2 minute, and temperature is in the screw rod: 185～195 ℃ in a district, 190～210 ℃ in two districts, 190～210 ℃ in three districts, 195～215 ℃ in four districts; The twin screw extruder rotating speed is 300-700 rev/min;
(4) discharging melt extrudes in twin screw extruder, extrudes postcooling, drying, pelletizing and gets product; Extruder temperature is 60-80 ℃, and screw slenderness ratio is 20-30.
6. the preparation method of a kind of high rigidity according to claim 5, the mar-proof talc powder filled polypropylene of high tenacity, it is characterized in that: described talcum powder master batch, mix in rubber internal mixer with talcum powder, rubber, processing aid earlier, the Banbury mixer temperature is 60-80 ℃, sends into then and finishes extruding pelletization in the single screw extrusion machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200410084709 CN1631960A (en) | 2004-11-30 | 2004-11-30 | Talc powder filled polypropylene with high rigidity, high toughness and high scratch resistance and method for preparing same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410084709 CN1631960A (en) | 2004-11-30 | 2004-11-30 | Talc powder filled polypropylene with high rigidity, high toughness and high scratch resistance and method for preparing same |
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| CN1631960A true CN1631960A (en) | 2005-06-29 |
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