CN105385041A - Thin-walled bumper modified polypropylene material and preparation process thereof - Google Patents
Thin-walled bumper modified polypropylene material and preparation process thereof Download PDFInfo
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- CN105385041A CN105385041A CN201410447578.1A CN201410447578A CN105385041A CN 105385041 A CN105385041 A CN 105385041A CN 201410447578 A CN201410447578 A CN 201410447578A CN 105385041 A CN105385041 A CN 105385041A
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Abstract
The present invention discloses a modified polypropylene material suitable for thin-walled bumpers, and a preparation process thereof, wherein the material comprises, by weight, 55-85 parts of polypropylene, 3-15 parts of a toughener, 5-15 parts of an inorganic mineral, 5-20 parts of mineral fibers, 1-10 parts of a compatibilizer, and 1-7 parts of a processing aid. According to the present invention, the product has characteristics of high fluidity, high toughness, high stiffness, high surface activity, low shrinkage, low linear thermal expansion shrinkage, heat resistance and low-temperature resistance, and the material can be suitable for preparation of vehicle bumpers, especially the thin-walled vehicle bumper having a wall thickness of about 2.0 mm.
Description
Technical field
The present invention relates to one and be applicable to modified polypropylene material for thin-wall bumper and preparation technology thereof, be specifically related to the high flowing of a kind of one for bumper, high tenacity, high rigidity, high surface, lower shrinkage, low linear thermal expansion shrinking percentage, heat-resisting low temperature resistant modified polypropylene material and preparation technology thereof.
Technical background
Polypropylene is a kind of versatility Plastic Resin of originating wide, cheap, has the advantage that low density, easy-formation processing, resistance to gasoline and chemicals are good, is widely used in the shell etc. of inner and outer decorative parts of automobile, electronics and household electronic products.But due to fragility large (particularly low temperature brittleness), degree of crystallinity compared with high, molecular polarity is little, blended property and the bonding force of pp and other polymers (as plastics, rubber) and mineral filler are very poor, limit its application in some fields, therefore need its modification for bumper.
Bumper is that a kind of surface-area is large, complex-shaped thin-walled large-sized structural component, not only requires to have excellent high and low temperature impelling strength, rigidity, ageing resistance, thermotolerance also will have oil-proofness, can sprayability.Current most of bumper adopts PP/POE co-mixing system and PP/EPDM/ talcum powder co-mixing system.Along with the development of automotive industry in recent years, new requirement be it is also proposed to collision bumper.By the contrast of the old and new's bumper material specification, be not difficult to find that appearance requirement is more and more higher along with bumper is increasingly sophisticated, require to carry out light-weight design simultaneously, wall thickness reduces to about 2.0mm from original about 3.0mm, makes collision bumper quality alleviate 31%, and shaping cycle shortens 15s simultaneously.And these changes require that bumper material improves mobility, rigidity, dimensional stability, surface spraying performance further on original toughness basis.
Summary of the invention
The object of this invention is to provide one and be applicable to modified polypropylene material for thin-wall bumper and preparation technology thereof, be specifically related to for the high flowing of one of bumper, high tenacity, high rigidity, high surface, lower shrinkage, low linear thermal expansion shrinking percentage, heat-resisting low temperature resistant modified polypropylene material and preparation technology thereof.
For realizing above object, technical scheme of the present invention introduces height flowing Co-polypropylene, the toughner of corresponding proportioning and certain kind, inorganic mineral, mineral fibre, compatilizer, processing aid.In proportioning of the present invention, the Co-polypropylene of the certain performance adopted fully effectively can improve the flowing property of material, toughner can significantly improve the toughness of material and reduce shrinking percentage, inorganic mineral can improve the rigidity of material and increase the planarization of product, mineral fibre can increase substantially the rigidity of material, compatilizer and processing aid can allow each uniform component distribution thus ensure the homogeneity of material, and in the present invention's formula, each component is added synergy within the specific limits and obtained the more excellent material of performance.
Modified polypropylene material of the present invention is made primarily of the raw material of following weight part:
Polypropylene 55 ~ 85 weight part
Toughner 3 ~ 15 weight part
Inorganic mineral 5 ~ 15 weight part
Mineral fibre 5 ~ 20 weight part
Compatilizer 1 ~ 10 weight part
Processing aid 1 ~ 7 weight part
Can also add other additives in material mixture ratio of the present invention, no more than 5 weight parts of addition, other described additives are one or more of thermo-stabilizer, uvioresistant auxiliary agent, carbon black and toner.
Polypropylene of the present invention is Co-polypropylene, and wherein the comonomer of Co-polypropylene comprises ethene, and the content of ethene is in the scope of 2 ~ 12mol% of multipolymer, and polyacrylic melt flow rate (MFR) is 60 ~ 150g/10min.Toughner of the present invention is PE (polyethylene, relative molecular mass about 160,000 PE), ethylene-octene copolymer (relative molecular mass is at 100-150 ten thousand), EPDM (terpolymer EP rubber, relative molecular weight is between 10-18 ten thousand), SEBS (is take polystyrene as end segment, the ethylene-butene copolymer obtained with polyhutadiene hydrogenation is the linear three embedding multipolymers of middle spring block, and relative molecular weight is between 10-120 ten thousand) in one or several mixing.Inorganic mineral of the present invention is one or more in the talcum powder of particle diameter between 0.3 ~ 1.8 μm, calcium carbonate, wollastonite.Mineral fibre of the present invention is silicon oxide whisker, aluminium borate whisker, one or several mixing in glass fibre.Compatilizer of the present invention is the polymkeric substance of polypropylene and maleic anhydride graft, percentage of grafting is 1%, melt flow rate (MFR) is greater than 85-120g/10min, or the polymkeric substance of polyolefin elastomer and maleic anhydride graft, percentage of grafting is 1%, a kind of in melt flow rate (MFR) 0.3 ~ 8g/10min or both with arbitrarily than mixture.Processing aid of the present invention is silane coupling agent (such as KH550, KH792, DL602 etc.), titanate coupling agent (being mainly NDZ101, NDZ201 etc.), ethylene bis stearamide, polyethylene wax, one or more mixing in white oil.Thermo-stabilizer of the present invention is one or more mixing be selected from hindered phenol or sulphur ester antioxidant, as antioxidant 3114, and antioxidant 1010, antioxidant 618, irgasfos 168, oxidation inhibitor DSTP.The present invention's raw material used all commercially.
Preparation method of the present invention is as follows:
(1) raw material mixes: take polypropylene by weight ratio, compatilizer, toughner, inorganic mineral and processing aid (or adding one or more other additives such as thermo-stabilizer, uvioresistant auxiliary agent, carbon black or toner again), high-speed mixing stirs 5 ~ 10 minutes;
(2) mineral fibre feeds in raw material: adopt weight-loss method to add mineral fibre in twin screw extruder;
(3) mixing: the mixture that step (1) obtains to be joined in the twin screw extruder adding mineral fibre mixing, through melt extruding, granulation; Concrete technology is: 150 ~ 200 DEG C, a district, two 200 ~ 250 DEG C, districts, three 200 ~ 250 DEG C, districts, four 210 ~ 220 DEG C, districts; The residence time is 5 ~ 10min, and twin screw rotating speed is 300 ~ 380r/min.
Beneficial effect of the present invention: the present invention obtains a kind of high flowing, high tenacity, high rigidity, high surface, lower shrinkage, low linear thermal expansion shrinking percentage, heat-resisting low temperature resistant modified polypropylene material, this material is applicable to prepares bumper, is specially adapted to the thin-walled bumper of about 2.0mm wall thickness.
Embodiment
The present invention will be further described by the following examples
Embodiment 1
Polypropylene is Co-polypropylene, and wherein the comonomer of Co-polypropylene comprises ethene, and the content of ethene is at 2 ~ 6mol%, and polyacrylic melt flow rate (MFR) is 80 ~ 120g/10min, and consumption is 65 weight parts; Toughner is PE (relative molecular weight is about 160,000), and consumption is 10 weight parts; Inorganic mineral is the wollastonite of 0.3 ~ 1.8 μm, and consumption is 9 weight parts; Mineral fibre is, aluminium borate whisker, and consumption is 12 weight parts; Compatilizer is percentage of grafting is 1%, and melt flow rate (MFR) is the polypropylene of 95g/10min and the polymkeric substance of maleic anhydride graft, and consumption is 2 weight parts; Processing aid is ethylene bis stearamide, and consumption is 2 weight parts;
Preparation method of the present invention is as follows:
(1) raw material mixes: take polypropylene by weight ratio, compatilizer, toughner, inorganic mineral and processing aid, and high-speed mixing stirs 5 ~ 10 minutes;
(2) mineral fibre feeds in raw material: adopt weight-loss method to add mineral fibre in twin screw extruder;
(3) mixing: the mixture that step (1) obtains is added in twin screw extruder mixing, through melt extruding, granulation, its technique is: 180 ~ 200 DEG C, a district, two 210 ~ 250 DEG C, districts, three 220 ~ 250 DEG C, districts, four 210 ~ 220 DEG C, districts; The residence time is 6 ~ 10min, and twin screw rotating speed is 330 ~ 380r/min.
Embodiment 2
Polypropylene is Co-polypropylene, and wherein the comonomer of Co-polypropylene comprises ethene, and the content of ethene is at 5 ~ 10mol%, and polyacrylic melt flow rate (MFR) is 100 ~ 130g/10min, and consumption is 70 weight parts; Toughner is EPDM (terpolymer EP rubber, relative molecular weight is between 10-18 ten thousand), and consumption is 12 weight parts; Inorganic mineral is the talcum powder of 0.8 ~ 1.5 μm, and consumption is 10 weight parts; Mineral fibre is aluminium borate whisker, and consumption is 4 weight parts; Compatilizer is percentage of grafting is 1%, and melt flow rate (MFR) is the polypropylene of 105g/10min and the polymkeric substance of maleic anhydride graft, and consumption is 1 weight part; Processing aid is silane coupling agent, and consumption is 3 weight parts.
Preparation method of the present invention is as follows:
(1) raw material mixes: take polypropylene by weight ratio, compatilizer, toughner, inorganic mineral and processing aid, and high-speed mixing stirs 5 ~ 10 minutes;
(2) mineral fibre feeds in raw material: adopt weight-loss method to add mineral fibre in twin screw extruder;
(3) mixing: the mixture that step (1) obtains is added in twin screw extruder mixing, through melt extruding, granulation, its technique is: 180 ~ 200 DEG C, a district, two 230 ~ 250 DEG C, districts, three 220 ~ 250 DEG C, districts, four 210 ~ 220 DEG C, districts; The residence time is 8min, and twin screw rotating speed is 350 ~ 380r/min.
Embodiment 3
Polypropylene is Co-polypropylene, and wherein the comonomer of Co-polypropylene comprises ethene, and the content of ethene is at 8 ~ 12mol%, and polyacrylic melt flow rate (MFR) is 100 ~ 150g/10min, and consumption is 80 weight parts; Toughner is SEBS (be take polystyrene as end segment, the ethylene-butene copolymer obtained with polyhutadiene hydrogenation is the linear three embedding multipolymers of middle spring block, and relative molecular weight is between 10-120 ten thousand), and consumption is 5 weight parts; Inorganic mineral is the talcum powder of 0.5 ~ 1.5 μm, and consumption is 5 weight parts; Mineral fibre is silicon oxide whisker, and consumption is 6 weight parts; Compatilizer is percentage of grafting is 1%, and melt flow rate (MFR) is the polypropylene of 100g/10min and the polymkeric substance of maleic anhydride graft, and consumption is 1 weight part; Processing aid is polyethylene wax, and consumption is 2 weight parts; Uvioresistant auxiliary agent, consumption is 1 weight part.
Preparation method of the present invention is as follows:
(1) raw material mixes: take polypropylene by weight ratio, compatilizer, toughner, inorganic mineral, processing aid and carbon black, and high-speed mixing stirs 7 ~ 10 minutes;
(2) mineral fibre feeds in raw material: adopt weight-loss method to add mineral fibre in twin screw extruder;
(3) mixing: the mixture that step (1) obtains is added in twin screw extruder mixing, through melt extruding, granulation, its technique is: 160 ~ 190 DEG C, a district, two 200 ~ 220 DEG C, districts, three 210 ~ 240 DEG C, districts, four 215 ~ 220 DEG C, districts; The residence time is 3 ~ 8min, and twin screw rotating speed is 330 ~ 350r/min.
Claims (1)
1. modified polypropylene material for thin-wall bumper and a preparation technology thereof, is characterized in that modified polypropylene material of the present invention is made primarily of the raw material of following weight part: polypropylene 55 ~ 85 weight part; Toughner 3 ~ 15 weight part; Inorganic mineral 5 ~ 15 weight part; Mineral fibre 5 ~ 20 weight part; Compatilizer 1 ~ 10 weight part; Processing aid 1 ~ 7 weight part.
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| CN201410447578.1A CN105385041A (en) | 2014-09-04 | 2014-09-04 | Thin-walled bumper modified polypropylene material and preparation process thereof |
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| CN201410447578.1A CN105385041A (en) | 2014-09-04 | 2014-09-04 | Thin-walled bumper modified polypropylene material and preparation process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304275A (en) * | 2016-04-25 | 2017-10-31 | 上海田强环保科技有限公司 | Automotive air blowers housing is material modified |
| CN107353491A (en) * | 2016-05-10 | 2017-11-17 | 合肥杰事杰新材料股份有限公司 | One kind is exempted to spray bumper oil resistant PP composite material and preparation method thereof |
| CN110628135A (en) * | 2018-06-25 | 2019-12-31 | 苏州市朗腾工贸有限公司 | Ultrahigh-fluidity TPV material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838423A (en) * | 2010-06-10 | 2010-09-22 | 南京聚隆科技股份有限公司 | Modified polypropylene material for thin-wall bumper and preparation method thereof |
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- 2014-09-04 CN CN201410447578.1A patent/CN105385041A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838423A (en) * | 2010-06-10 | 2010-09-22 | 南京聚隆科技股份有限公司 | Modified polypropylene material for thin-wall bumper and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304275A (en) * | 2016-04-25 | 2017-10-31 | 上海田强环保科技有限公司 | Automotive air blowers housing is material modified |
| CN107353491A (en) * | 2016-05-10 | 2017-11-17 | 合肥杰事杰新材料股份有限公司 | One kind is exempted to spray bumper oil resistant PP composite material and preparation method thereof |
| CN110628135A (en) * | 2018-06-25 | 2019-12-31 | 苏州市朗腾工贸有限公司 | Ultrahigh-fluidity TPV material |
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