CN114685897A - Special modified PP (polypropylene) material for weather-resistant bumper for automobile and preparation method thereof - Google Patents
Special modified PP (polypropylene) material for weather-resistant bumper for automobile and preparation method thereof Download PDFInfo
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- CN114685897A CN114685897A CN202210522368.9A CN202210522368A CN114685897A CN 114685897 A CN114685897 A CN 114685897A CN 202210522368 A CN202210522368 A CN 202210522368A CN 114685897 A CN114685897 A CN 114685897A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 88
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 77
- 239000000463 material Substances 0.000 title claims abstract description 55
- -1 polypropylene Polymers 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 25
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 18
- 239000006229 carbon black Substances 0.000 claims abstract description 18
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- 239000004611 light stabiliser Substances 0.000 claims abstract description 12
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 9
- 239000002250 absorbent Substances 0.000 claims abstract description 7
- 230000002745 absorbent Effects 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 4
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- 230000001808 coupling effect Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 24
- 230000032683 aging Effects 0.000 abstract description 7
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005469 granulation Methods 0.000 description 5
- 230000003179 granulation Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000001408 amides Chemical class 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 4
- 150000002989 phenols Chemical class 0.000 description 4
- 239000002516 radical scavenger Substances 0.000 description 4
- 239000008117 stearic acid Substances 0.000 description 4
- 239000012745 toughening agent Substances 0.000 description 4
- 230000003712 anti-aging effect Effects 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000011256 inorganic filler Substances 0.000 description 3
- 229910003475 inorganic filler Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002667 nucleating agent Substances 0.000 description 2
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 2
- 238000002464 physical blending Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920002397 thermoplastic olefin Polymers 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to the technical field of processing and manufacturing of polypropylene composite materials, in particular to a polypropylene composite material for an automobile bumper and a preparation method thereof, and especially relates to a modified PP material special for a weather-proof bumper for an automobile and a preparation method thereof, wherein the modified PP material special for the weather-proof bumper for the automobile comprises the following raw materials in parts by weight: yanshan petrochemical polypropylene K772635-39 parts, PP830311-15 parts, PP24011.5-3.5 parts, POE815026-32 parts, superfine talcum powder (2500 meshes) 10-15 parts, coupling agent 0.05-0.2 part, POE-g-MAH (POE grafted maleic anhydride) 2-4 parts, antioxidant 10100.1-0.2 part, antioxidant DLTP0.15-0.4 part, lubricant ZnSt 0.15-0.4 part, carbon black 0.05-0.2 part, hindered stabilizer 944 (Swiss soda) 0.01-0.03 part, ultraviolet absorbent UV327 (Swiss soda) 0.005-0.02 part, and light stabilizer 770 (Swiss soda) 0.005-0.02 part; the prepared material has excellent synergistic effect, strong aging resistance, simple preparation method, easy processing and forming of the material and better market value.
Description
The technical field is as follows:
the invention relates to the technical field of processing and manufacturing of polypropylene composite materials, in particular to a polypropylene composite material for an automobile bumper and a preparation method thereof, and especially relates to a modified PP material special for a weather-resistant bumper for an automobile and a preparation method thereof.
Background art:
the PP material has the advantages of low density, easiness in processing and molding, recyclability and the like, and the PP material becomes a plastic variety with the largest usage amount and the highest development speed in automobile plastics. The automobile bumper is used as an outer covering part of an automobile, has large surface area, is exposed outdoors for a long time, has much higher aging speed than a plastic inner decorating part of the automobile, and has high requirement on the aging performance of the material as a large-scale structure passive safety part of the automobile. In the past, because a black or gray bumper is used, the added carbon black slows down the aging of the material to a certain extent, but cannot completely achieve the purpose of anti-aging; chinese patent 2013100439283 discloses a modified polypropylene material for automobile bumpers and a preparation method thereof, wherein the modified polypropylene material comprises polypropylene, a toughening agent, a compatilizer, an inorganic filler, toner and a dispersing agent, and the components are as follows in parts by weight: polypropylene: 30-60 parts of; a toughening agent: 10-20; a compatilizer: 3-8; inorganic filler: 25-40; toner: 0.1 to 2.6; dispersing agent: 0.3 to 2.1; a method of modifying a polypropylene material for use in an automotive bumper comprising the steps of: (1) uniformly mixing all the components in a mixer; (2) adding the mixture obtained in the step (1) into a double-screw extruder for mixing, wherein the temperature of the double-screw extruder is 190-; (3) extruding the obtained material, cooling with cooling water at normal temperature, drying by air blast, and granulating to obtain the material for the automobile bumper; chinese patent 2015110204372 discloses a polypropylene composite material special for automobile bumpers and a preparation method thereof, wherein the polypropylene composite material contains polypropylene, inorganic filler, metallocene polyethylene, ethylene ethyl acrylate, antioxidant and other auxiliary agents; the preparation method of the special polypropylene composite material for the automobile bumper comprises the following steps: (1) weighing the components according to the weight ratio; (2) putting the raw materials into a high-speed mixer for dry mixing for 3-5 minutes; (3) putting the product obtained in the step (2) into a double screw machine, and performing melt extrusion and granulation, wherein the process comprises the following steps: the temperature of the first area is 200-210 ℃, the temperature of the second area is 210-220 ℃, the temperature of the third area is 210-220 ℃, and the temperature of the fourth area is 205-215 ℃; the retention time is 1-2 minutes, and the pressure is 12-18 Mpa; chinese patent 201810057103X discloses a polypropylene composite material for automobile bumpers and a preparation method thereof, which comprises the following components in parts by weight: 61-78 parts of polypropylene, 6-13 parts of talcum powder, 16-26 parts of toughening agent and 0.2-0.5 part of nucleating agent; the preparation method of the polypropylene composite material for the automobile bumper comprises the following steps: (1) mixing polypropylene, a toughening agent, a nucleating agent, a light stabilizer, a lubricant and an antioxidant in a high-speed mixer for 3-5 minutes, wherein the rotating speed of the high-speed mixer is 200-300 r/min; (2) adding talcum powder into the high-speed mixer in the step (1) to mix for 3-5 minutes, wherein the rotating speed of the high-speed mixer is 200-300 revolutions per minute; (3) adding the mixed materials in the step (2) into a double-screw extruder to perform melt extrusion, granulation, drying, cooling and packaging to obtain the polypropylene composite material for the automobile bumper, wherein in the step (3), the temperature of the double-screw extruder from a feeding section to a machine head is 170 ℃, 200 ℃, 210 ℃, 205 ℃, 200 ℃ and 200 ℃ in sequence, and the vacuum degree of the double-screw extruder is not more than-0.08 MPa; chinese patent 201811635142X discloses a polypropylene composite material for fast-beat, low-density and thin-walled automobile bumpers and a preparation method thereof, wherein the polypropylene composite material is prepared from the following raw materials in parts by weight: polypropylene: 60-85 parts of superfine super-high diameter-thickness ratio talcum powder: 5-18 parts of elastomer: 8-20 parts of antioxidant: 0.1-1.0 part of other auxiliary agents: 0-3 parts of a solvent; the preparation method of the polypropylene composite material for the fast-beat, low-density and thin-walled automobile bumper comprises the following preparation steps: mixing 60-85 parts of polypropylene, 8-20 parts of elastomer, 0.1-1.0 part of antioxidant and 0-3 parts of other auxiliary agents according to parts by weight, drying, placing into a main feeding bin of a meshing co-rotating double-screw extruder, and adding into a machine barrel of the extruder through a feeding screw. 5-18 parts of superfine talcum powder with ultrahigh diameter-thickness ratio is added into an extruder from a side feeding port and is melted, extruded, cooled and cut into granules by a double-screw extruder to prepare the polypropylene composite material, and the processing temperature of the I-X area of the double-screw extruder is 155 ℃, 185 ℃, 210 ℃, 215 ℃, 220 ℃, 225 ℃, 225 ℃, 230 ℃ in sequence. The rotating speed of the main screw is 400-600 r/min, and the temperature of the water tank is 15-55 ℃; chinese patent 201911283786.1 discloses a modified polypropylene composite material for an automobile bumper and a preparation method thereof, wherein the modified polypropylene composite material comprises the following raw materials in percentage by mass: the melt flow rate of the medium-high fluidity impact co-polypropylene at 230 ℃ and under the load of 2.16KG is 10-20g/10min, and the melt flow ratio at 230 ℃ is 3-4; the melt flow rate of the high-flow copolymerized polypropylene at 230 ℃ and under the condition of 2.16kg load is 25-32g/10min, and the melt flow ratio at 190 ℃ is 3.5-4.0; the polyolefin thermoplastic elastomer is one or a mixture of ethylene-butene copolymer and ethylene-octene copolymer; the mineral powder is one or a mixture of two of talcum powder (1250-5000 meshes) for the plastic filler and calcium carbonate (800-1250 meshes) for the plastic filler; the carbon black master batch is prepared from one or a mixture of more of furnace carbon black and thermal cracking carbon black which take polyethylene or polyethylene wax as a matrix, and mainly plays a role in dyeing; the antioxidant is any one or a mixture of more of phenols, phosphites and semi-hindered phenol compounds, and is used for inhibiting degradation generated in the processing process; the acid scavenger is selected from one or a mixture of low stearic acid composite esters, amides and the like, and has the function of promoting the composite to capture halogen micromolecules remained in the resin during extrusion processing; the lubricant is at least one of silicone, ester, amide, polyethylene, stearic acid, fatty acid and ester; the preparation method comprises the following steps: adding the middle-high fluidity impact-resistant co-polypropylene, the high fluidity co-polypropylene, the talcum powder, the thermoplastic polyolefin elastomer, the carbon black master batch, the antioxidant, the lubricant and the acid scavenger into a double-screw extruder from a main feeding port of the screw extruder together, and performing the processes of melting physical blending, extruding, water cooling, water removing, grain cutting and drying to obtain the modified polypropylene composite material for the automobile bumper, wherein the length-diameter ratio of the screw extruder is (36-48) 1, the processing temperature is 160-220 ℃, the screw rotating speed is 400-600rpm, and the feeding amount is 400-800 kg/h; chinese patent 2020113035201 discloses a modified polypropylene composite material for an automobile bumper and a preparation method thereof, wherein the modified polypropylene composite material comprises the following raw materials in percentage by mass: the melt flow rate of the medium-high flow high rigidity copolymerized polypropylene is 25-32g/10min under the conditions of 230 ℃ and 2.16KG load; the melt flow rate of the high-flow high-rigidity polypropylene is 50-55g/10min under the conditions of 230 ℃ and 2.16kg of load; the polyolefin thermoplastic elastomer is one or a mixture of ethylene-butene copolymer and ethylene-octene copolymer, and the crystallinity is determined to be between 8 and 10 percent by DSC method; the mineral powder is talcum powder for plastic filler, and the particle size is as follows: d500.65 μm; the carbon black master batch is prepared by one or a mixture of more of furnace carbon black and thermal cracking carbon black which take polyethylene or polyethylene wax as a matrix; the antioxidant is any one or a mixture of more of phenols, phosphites and semi-hindered phenol compounds; the acid scavenger is selected from low stearic acid complex ester, amide, etc. or their mixture; the lubricant is at least one of silicone, ester, amide, polyethylene, stearic acid, fatty acid and ester; the preparation method comprises the following steps: adding medium-high flow high-rigidity copolymerized polypropylene, talcum powder, thermoplastic polyolefin elastomer, carbon black master batch, antioxidant, lubricant and acid scavenger into a double-screw extruder from a main feeding port of the screw extruder together, and performing the processes of melting physical blending, extruding, water cooling, dewatering, grain cutting and drying to obtain the modified polypropylene composite material for the automobile bumper, wherein the length-diameter ratio of the double-screw extruder is (36-48) 1, the processing temperature is 160-220 ℃, the screw rotating speed is 400-600rpm, and the feeding amount is 400-800 kg/h; polypropylene composite materials related in the prior art and the patent products lack further anti-aging treatment on polypropylene (PP) bumper materials, although PP in the polypropylene composite materials only contains single bonds and does not absorb ultraviolet rays, due to the fact that PP contains unsaturated structure defects, photosensitive impurities such as trace hydroperoxide and fused ring compounds remained in the synthesis and processing processes can absorb ultraviolet rays to cause photodegradation, and the materials are not good in aging performance; therefore, the modified PP material special for the weather-proof bumper for the automobile is researched and designed, the base material meeting the requirement of the formula is obtained by mixing a plurality of PP base materials according to the formula, the defect of performance reduction of modified plastics caused by excessive filler is overcome by adding the nanoscale talcum powder, the extremely strong recoverability is obtained, the hindered amine light stabilizer and the ultraviolet absorber are used together, the excellent synergistic effect is achieved, the anti-aging performance of the material is greatly improved under the action of the phenol antioxidant, and the modified PP material has good use value and popularization prospect.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and provides a modified PP material special for a weather-proof bumper for an automobile and a preparation method thereof, so that the produced material has the advantage of aging resistance on the basis of meeting the basic requirements of the bumper.
In order to realize the aim, the modified PP material special for the weather-proof bumper for the automobile comprises the following raw materials in parts by weight: 772635-39 parts of Yanshan petrochemical polypropylene K, 1-15 parts of PP830311, 24011.5-3.5 parts of PP, 6-32 parts of POE 8150232, 10-15 parts of superfine talcum powder (2500 meshes), 0.05-0.2 part of coupling agent, 2-4 parts of POE-g-MAH (POE grafted maleic anhydride), 10100.1-0.2 part of antioxidant, 0.15-0.4 part of antioxidant DLTP, 0.15-0.4 part of lubricant ZnSt, 0.05-0.2 part of carbon black, 0.01-0.03 part of hindered stabilizer 944 (Swiss soda), 0.005-0.02 part of ultraviolet absorber UV327 (Swiss soda), and 0.005-0.02 part of light stabilizer 770 (Swiss soda).
The preparation method of the special modified PP material for the weather-resistant bumper for the automobile comprises the following steps: weighing the components for later use, firstly adding PP K7726, PP8303, PP2401, POE8150 and POE-g-MAH (POE grafted maleic anhydride) into a high-speed mixer, stirring at a low speed for 1 minute, then stirring at a high speed for 1 minute, then adding superfine talcum powder (2500 meshes), a coupling agent, an antioxidant 1010, an antioxidant DLTP, a lubricant ZnSt, carbon black, a hindered stabilizer 944, an ultraviolet absorbent UV327 and a light stabilizer 770, stirring at a high speed for 5 minutes, and discharging. Wherein, the talcum powder and the coupling agent are added together after being fully mixed, thus better playing the coupling effect. The mixed raw materials are placed into a Koya 63 extruder for extrusion molding, the materials are extruded from a die head through a twin-screw machine conveying section, a compression section, a plasticizing section, a pressurizing section and a discharging section in the extruder, a brace is extruded from the die head, the brace is cooled through a cooling water tank, most of moisture is absorbed by an air knife and then enters a granulator for granulation, unqualified particles are removed through a vibrating screen, the particles are absorbed into a drying and homogenizing bin through a material absorber, and finished product packaging is carried out after 1 hour of circular homogenization, so that the super-weather-resistant automobile PP bumper material is obtained. The manufactured super weather-resistant PP bumper material is processed into a semi-finished bumper by injection molding through an injection molding machine. The material needs to be baked in an oven for 2-3 hours before injection processing, and can be subjected to next injection processing molding.
The invention adopts the hindered amine light stabilizer and the ultraviolet absorber to be used together, has excellent synergistic effect, and greatly improves the aging resistance of the material under the action of the phenol antioxidant, while the expensive 944, 770, UV327 and the like are added in a little amount, so that the price of the material is not increased too much, thereby maintaining high performance/price ratio, well improving market competitiveness, having simple preparation method, being easy to process and form and having better market value.
The specific implementation mode is as follows:
the invention is further described below by way of examples.
Example 1:
the material is prepared from the following raw materials in percentage by weight: yanshan petrochemical polypropylene K772635 parts, PP 830313 parts, PP 24013.7 parts, POE 815030 part, superfine talcum powder (2500 meshes) 14 parts, coupling agent 0.15 part, POE-g-MAH (POE grafted maleic anhydride) 3.34 parts, antioxidant 10100.15 parts, antioxidant DLTP 0.26 part, lubricant ZnSt 0.26 part, carbon black 0.1 part, hindered stabilizer 944 (Swiss soda) 0.02 part, ultraviolet absorbent UV327 (Swiss soda) 0.01 part and light stabilizer 770 (Swiss soda) 0.01 part.
Example 2:
the material is prepared from the following raw materials in percentage by weight: yanshan petrochemical polypropylene K772637 parts, PP 830314 parts, PP 24012.4 parts, POE 815029 parts, superfine talcum powder (2500 meshes) 13 parts, coupling agent 0.15 part, POE-g-MAH (POE grafted maleic anhydride) 3.5 parts, antioxidant 10100.15 parts, antioxidant DLTP 0.33 part, lubricant ZnSt 0.33 part, carbon black 0.1 part, hindered stabilizer 944 (Swiss soda) 0.02 part, ultraviolet absorbent UV327 (Swiss soda) 0.01 part and light stabilizer 770 (Swiss soda) 0.01 part.
Example 3:
the material is prepared from the following raw materials in percentage by weight: yanshan petrochemical polypropylene K772639 parts, PP 830312.2 parts, PP 24013.5 parts, POE 815025 parts, superfine talcum powder (2500 meshes) 15 parts, coupling agent 0.2 part, POE-g-MAH (POE grafted maleic anhydride) 4 parts, antioxidant 10100.137 parts, antioxidant DLTP 0.4 part, lubricant ZnSt 0.4 part, carbon black 0.1 part, hindered stabilizer 944 (Swiss soda) 0.023 part, ultraviolet absorbent UV327 (Swiss soda) 0.02 part and light stabilizer 770 (Swiss soda) 0.02 part.
In embodiments 1 to 3, the preparation method of the modified PP material for the weather-resistant bumper for the automobile comprises the following steps: the components are weighed for standby application, firstly PPK7726, PP8303, PP2401, POE8150 and POE-g-MAH (POE grafted maleic anhydride) are added into a high-speed mixer and stirred at a low speed for 1 minute, then stirred at a high speed for 1 minute, and then added with superfine talcum powder (2500 meshes), a coupling agent, an antioxidant 1010, an antioxidant DLTP, a lubricant ZnSt, carbon black, a hindered stabilizer 944, an ultraviolet absorbent UV327 and a light stabilizer 770, stirred at a high speed for 5 minutes, and then discharged. Wherein, the talcum powder and the coupling agent are added together after being fully mixed, thus better playing the coupling effect. And putting the mixed raw materials into a Koya 63 extruder for extrusion molding.
Extrusion granulation was performed using a combination of dual high shear screws from Coya 63. The temperature of each section of the extruder is set as follows: the first section is 180 ℃, the second section is 195 ℃, the third section is 210 ℃, the fourth section is 220 ℃, the fifth section is 235 ℃, the sixth section is 235 ℃, the head is 230 ℃ and the screw rotating speed is 350 r/min. The material passes through a twin-screw machine conveying section, a compression section, a plasticizing section, a pressurizing section and a discharging section in an extruder, a strip is extruded from a die head, the strip is cooled through a cooling water tank, the length of the water tank is more than 4 meters, the cooling temperature is controlled at 40 +/-5 ℃, most of water is absorbed by an air knife and then enters a granulator for granulation, unqualified particles are removed by a vibrating screen, the unqualified particles are absorbed into a drying and homogenizing bin by an absorber, and the product is packaged after being circularly homogenized for 1 hour, so that the weather-resistant PP bumper material for the automobile is obtained, and the prepared modified PP material special for the weather-resistant bumper for the automobile and the conventional PP bumper material have related performance parameters shown in table 1.
The prepared super weather-resistant PP bumper material for the automobile is processed into a semi-finished bumper by injection molding through an injection molding machine. The material needs to be baked in an oven for 2-3 hours before injection processing, the baking temperature is less than 110 ℃, and the moisture content is less than or equal to 0.1 percent, so that the material meets the requirements, and can be subjected to next injection processing molding. The injection processing temperature is controlled between 190 ℃ and 210 ℃; controlling the injection pressure to be 30-60 MPa; injection speed: medium-fast; back pressure: 0.6 MPa; screw rotation speed: 20-70 r/min; the temperature of the die is 40-60 ℃; exhaust port depth: 0.0038-0.0076 mm. Injection molded bumpers require trimming and then painting.
Table 1: the invention is compared with the related performance parameters of the conventional PP bumper material for automobiles
Claims (2)
1. The special modified PP material for the weather-resistant bumper for the automobile is characterized in that: the modified PP material special for the weather-resistant bumper for the automobile comprises the following raw materials in parts by weight: 772635-39 parts of Yanshan petrochemical polypropylene K, 1-15 parts of PP830311, 24011.5-3.5 parts of PP, 6-32 parts of POE 8150232, 10-15 parts of superfine talcum powder (2500 meshes), 0.05-0.2 part of coupling agent, 2-4 parts of POE-g-MAH (POE grafted maleic anhydride), 10100.1-0.2 part of antioxidant, 0.15-0.4 part of antioxidant DLTP, 0.15-0.4 part of lubricant ZnSt, 0.05-0.2 part of carbon black, 0.01-0.03 part of hindered stabilizer 944 (Swiss soda), 0.005-0.02 part of ultraviolet absorber UV327 (Swiss soda), and 0.005-0.02 part of light stabilizer 770 (Swiss soda).
2. The modified PP material for the weather-proof bumper of the automobile as claimed in claim 1, wherein: the preparation method of the special modified PP material for the weather-proof bumper for the automobile comprises the following steps: weighing the components for later use, firstly adding PP K7726, PP8303, PP2401, POE8150 and POE-g-MAH (POE grafted maleic anhydride) into a high-speed mixer, stirring at a low speed for 1 minute, then stirring at a high speed for 1 minute, then adding superfine talcum powder (2500 meshes), a coupling agent, an antioxidant 1010, an antioxidant DLTP, a lubricant ZnSt, carbon black, a hindered stabilizer 944, an ultraviolet absorbent UV327 and a light stabilizer 770, stirring at a high speed for 5 minutes, and discharging; wherein, the talcum powder and the coupling agent are added together after being fully mixed, thereby better playing the coupling effect; putting the mixed raw materials into a Koya 63 extruder for extrusion molding, extruding the materials into a double-screw extruder for conveying, compressing, plasticizing, pressurizing and discharging, drawing strips from a die head, cooling the strips by a cooling water tank, sucking most of moisture by an air knife, then cutting the strips into granules by a granulator, removing unqualified granules by a vibrating screen, sucking the granules into a drying and homogenizing bin by a suction machine, circularly homogenizing for 1 hour, and packaging finished products to obtain the super-weather-resistant PP bumper material; the manufactured super weather-resistant PP bumper material is processed into a semi-finished bumper by injection molding through an injection molding machine; the material needs to be baked in an oven for 2-3 hours before injection processing, and can be subjected to next injection processing molding.
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| CN102649854A (en) * | 2011-02-23 | 2012-08-29 | 中国科学院化学研究所 | Polypropylene composition and preparation method thereof |
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| CN103102592A (en) * | 2013-02-04 | 2013-05-15 | 北京海科华昌新材料技术有限公司 | Modified polypropylene material for automotive bumper and preparation method thereof |
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| CN102206383A (en) * | 2011-06-30 | 2011-10-05 | 广州市聚赛龙工程塑料有限公司 | Polypropylene composite for automobile bumpers, and preparation method thereof |
| CN102827425A (en) * | 2012-09-14 | 2012-12-19 | 苏州谷力生物科技有限公司 | Polypropylene (PP) composition for automobile bumpers and preparation method thereof |
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