CN105542375A - High-performance polypropylene composite material applicable to thin-walled part injection molding and preparation method thereof - Google Patents
High-performance polypropylene composite material applicable to thin-walled part injection molding and preparation method thereof Download PDFInfo
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- CN105542375A CN105542375A CN201511020579.9A CN201511020579A CN105542375A CN 105542375 A CN105542375 A CN 105542375A CN 201511020579 A CN201511020579 A CN 201511020579A CN 105542375 A CN105542375 A CN 105542375A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract
The invention discloses a high-performance polypropylene composite material applicable to thin-walled part injection molding and a preparation method thereof. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 40-79% of polypropylene, 15-25% of high-performance inorganic filler, 5-25% of elastomer toughener, 0.1-2% of stabilizer and 0-5% of other additives. Under the optimal proportioning and synergistic actions of the high-flowability polypropylene, high-performance inorganic filler and elastomer toughener, the obtained high-performance polypropylene composite material has the advantages of high flowability, high rigidity and balanced rigidity and toughness. The high-performance inorganic filler is added from the side feed port, thereby obtaining the polypropylene composite material with better comprehensive mechanical properties. Compared with the traditional toughened strengthened polypropylene material, the material disclosed by the invention has the advantages of obviously higher flowability and rigidity, and enough impact resistance, and is very suitable for injection molding of thin-walled parts.
Description
Technical Field
The invention relates to a polypropylene composite material, in particular to a high-performance polypropylene composite material which can be used for injection molding of thin-walled parts and a preparation method thereof; belongs to the field of polymer modification and processing.
Background
With the rapid development of the automobile industry and the increasing severity of energy problems, almost all automobile factories are dedicated to the related research on the light weight of the whole automobile. In addition to the substitution of plastics for steel, physical and chemical foaming, and the reduction of material density, the thinning of plastic parts is one of important research fields.
At present, the wall thickness of an interior part of a plastic part for a main stream vehicle is mainly 2.5-3.0mm, the wall thickness of an exterior part of the plastic part for the main stream vehicle is mainly 3.0-3.5mm, and if the wall thickness can be reduced to about 1.8-2.2mm on the premise of not influencing the use, the total weight of the part can be greatly reduced, so that the purpose of reducing the weight of the whole vehicle is achieved. In order to realize the thinning of the parts, the conventional toughening, reinforcing and modifying polypropylene material cannot be directly used only from the material perspective except that the design of a die and a structure needs to be greatly changed. This is because the wall thickness of the part is greatly reduced, on the one hand, the processing performance of the material is required to be obviously higher, and the fluidity of the required material is far higher than that of the conventional material; on the other hand, due to the great reduction of the wall thickness, the rigidity and the bearing capacity of the part are challenged more, the bending resistance of the original conventional polypropylene material can not meet the requirement, and the conventional polypropylene material needs to have obviously higher strength and modulus, and simultaneously, the density of the material can not be increased or the impact toughness can not be greatly reduced.
In order to achieve the aim, the high-performance polypropylene composite material with high fluidity, high rigidity and rigidity-toughness balance is obtained by the synergistic effect of the high-performance superfine mineral filler and the elastomer toughening agent, the optimal component proportion is obtained, and a lateral feeding process is used, so that the injection molding use requirement of thin-walled parts can be met.
Disclosure of Invention
The invention aims to develop a high-performance polypropylene composite material for injection molding of thin-walled parts, which is used for injection molding of thin-walled parts in the automobile or household appliance industry.
Another object of the present invention is to provide a method for preparing such a polypropylene composite.
The purpose of the invention can be realized by the following technical scheme:
a high-performance polypropylene composite material for injection molding of thin-walled parts comprises the following raw materials in percentage by weight:
wherein,
the polypropylene is homopolymerized or copolymerized propylene with the melt flow rate of 30-100g/10min, the test condition is 230 ℃ multiplied by 2.16kg, wherein the comonomer of the copolymerized propylene is ethylene, and the content of the comonomer is 4-10 mol%.
The high-performance inorganic filler is one or a composition of more than two of talcum powder, mica, whisker, wollastonite and glass fiber. Talc powder with an average diameter of 1um is preferred.
The elastomer toughening agent is one or a composition of more than two of polybutadiene rubber, ethylene-propylene-diene rubber (EPDM), ethylene-octene copolymer, ethylene-butene copolymer and the like. Preferably an ethylene-octene copolymer elastomer, having a melt flow rate (230 ℃ C. times.2.16 kg) of 0.5 to 10g/10 min.
The stabilizer is a primary antioxidant and a secondary antioxidant which are considered to be needed by a person skilled in the art, wherein the primary antioxidant is a hindered phenol or thioester antioxidant, and the secondary antioxidant is a phosphite or ester antioxidant.
Such other additives include combinations of one or more of colorants, nucleating agents, blowing agents, surfactants, plasticizers, coupling agents, flame retardants, light stabilizers, processing aids, antistatic aids, antimicrobial aids, and lubricants as deemed desirable by one skilled in the art.
The preparation method of the high-performance polypropylene composite material for injection molding of the thin-walled parts comprises the following steps:
1) weighing the raw materials according to the weight ratio;
2) dry-mixing polypropylene, high-performance inorganic filler, elastomer toughening agent, stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes, adding the mixed raw materials into a double-screw extruder, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
Another preferred method is: dry-mixing polypropylene, an elastomer toughening agent, a stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes to prepare a mixture A, adding the mixture A into a double-screw extruder from a main screw feeding port, adding a high-performance inorganic filler into the double-screw extruder from the middle side of a screw to a feeding port, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
The invention has the advantages that:
1. the high-performance polypropylene composite material with high fluidity, high rigidity and rigidity-toughness balance is obtained through the optimal proportion and synergistic effect of the high-fluidity polypropylene, the high-performance inorganic filler and the elastomer toughening agent.
2. The polypropylene composite material with better comprehensive mechanical property is obtained by a process method of adding the high-performance inorganic filler from a side feeding port.
3. Compared with the traditional toughened and reinforced polypropylene material, the material disclosed by the invention has obviously higher fluidity and rigidity and sufficiently high impact resistance, and is very suitable for injection molding of thin-walled parts.
Detailed Description
The present invention will be described in further detail with reference to examples. The scope of the invention is not limited by these examples, which are set forth in the following claims.
In the composite formulations of the examples and comparative examples, the high flow polypropylene used was block copolymerized propylene having a melt flow rate (230 ℃ C.. times.2.16 kg) of 30 to 80/10min, and the conventional polypropylene used was block copolymerized propylene having a melt flow rate (230 ℃ C.. times.2.16 kg) of 5 to 30/10min, wherein the comonomer of the block copolymerized propylene was ethylene and the content thereof was in the range of 4 to 10 mol%.
The high-performance inorganic filler is talcum powder with the average diameter of 1 um.
The elastomer used was ethylene-octene copolymer 8200 from DOW.
The stabilizers used were NegonoxDTP (chemical name stearyl thiodipropionate) from ICE of the United kingdom, Irganox1010 (chemical name pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]) from Ciba, and Igrafos168 (chemical name tris (2, 4-di-tert-butylphenyl) phosphite) from Ciba.
Example 1
Weighing 69.5% of high-fluidity polypropylene, 15% of talcum powder, 15% of elastomer toughening agent, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of NegonoxDTP according to weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 2
Weighing 64.5 percent of high-fluidity polypropylene, 20 percent of talcum powder, 15 percent of elastomer, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of NegonoxDTP according to the weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 3
Weighing 59.5 percent of high-fluidity polypropylene, 25 percent of talcum powder, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of NegonoxDTP according to the weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 4
Weighing 74.5 percent of high-fluidity polypropylene, 20 percent of talcum powder, 5 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of NegonoxDTP according to the weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, melting, extruding and granulating, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 5
Weighing 54.5% of high-fluidity polypropylene, 20% of talcum powder, 25% of elastomer, 0.1% of Irganox1010, 0.1% of Igrafos168 and 0.3% of NegonoxDTP according to the weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Example 6
Weighing 64.5 percent of high-fluidity polypropylene, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of NegonoxDTP according to the weight percentage, and dry-mixing the components in a high-speed mixer for 5 minutes to prepare a mixture A; respectively adding the mixture A into a double-screw extruder from a main feeding port of the screw and 20 percent of talcum powder from a lateral feeding port in the middle of the screw for melting, extruding and granulating; wherein the temperature in the screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample. Comparative example
Weighing 64.5 percent of common polypropylene, 20 percent of talcum powder, 15 percent of elastomer toughening agent, 0.1 percent of Irganox1010, 0.1 percent of Igrafos168 and 0.3 percent of NegonoxDTP according to the weight percentage, dry-mixing for 5 minutes in a high-speed mixer, adding into a double-screw extruder, and carrying out melt extrusion granulation, wherein the temperature in a screw cylinder is as follows: the first zone is 200 ℃, the second zone is 210 ℃, the third zone is 210 ℃, the fourth zone is 210 ℃, the head is 220 ℃, and the rotating speed of the double-screw extruder is 400 r/min. Drying the particles, and performing injection molding on an injection molding machine to prepare a sample.
Performance evaluation method:
the sample density test is carried out according to the ISO1183-1 standard; the bending performance test is carried out according to ISO178 standard, the size of a test sample is 80 multiplied by 10 multiplied by 4mm, the span is 64mm, and the bending speed is 2 mm/min; the impact performance test of the simply supported beam is carried out according to the ISO179-1 standard, the size of a sample is 80 multiplied by 10 multiplied by 4mm, and the depth of a notch is one third of the thickness of the sample; the melt flow rate was determined according to ISO1133-1, test conditions 230 ℃ X2.16 kg.
The formulations and performance test results for the examples and comparative examples are shown in the following tables:
TABLE 1 EXAMPLES 1-6 AND COMPARATIVE EXAMPLE MATERIALS FORMULATION (% by weight)
Table 2 examples 1-6 and comparative examples performance test results
As can be seen from comparison of example 2 with the comparative example, the product of example 2 has significantly higher fluidity and rigidity and slightly reduced toughness compared with the traditional toughened and reinforced polypropylene material. As can be seen from the comparison of examples 1-3, the rigidity of the material is gradually increased and the impact resistance is obviously reduced with the increase of the filler content, and the density of the material is gradually increased. As can be seen from comparison of examples 2,4 and 5, the toughness of the material is gradually improved and the rigidity loss is gradually obvious along with the increase of the content of the elastomer toughening agent. Example 6 in comparison with example 2, it can be seen that by using a side-fed approach with inorganic filler, a higher flexural strength can be achieved with little loss of toughness and a combination of properties superior to all other examples.
Claims (10)
1. A high-performance polypropylene composite material for injection molding of thin-walled parts is characterized in that: the material consists of the following raw materials in percentage by weight:
2. the high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 1, wherein: the polypropylene is homopolymerized or copolymerized propylene with the melt flow rate of 30-100g/10min, the test condition is 230 ℃ multiplied by 2.16kg, wherein the comonomer of the copolymerized propylene is ethylene, and the content of the comonomer is 4-10 mol%.
3. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 1, wherein: the high-performance inorganic filler is one or a composition of more than two of talcum powder, mica, whisker, wollastonite and glass fiber.
4. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 3, wherein: the high-performance inorganic filler is talcum powder with the average diameter of 1 um.
5. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 1, wherein: the elastomer toughening agent is one or a composition of more than two of polybutadiene rubber, ethylene-propylene-diene rubber (EPDM), ethylene-octene copolymer, ethylene-butene copolymer and the like.
6. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 5, wherein: the elastomer toughening agent is an ethylene-octene copolymer elastomer, the melt flow rate is 0.5-10g/10min, and the test condition is 230 ℃ multiplied by 2.16 kg.
7. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 1, wherein: the stabilizer is a primary antioxidant and a secondary antioxidant which are considered to be needed by a person skilled in the art, wherein the primary antioxidant is a hindered phenol or thioester antioxidant, and the secondary antioxidant is a phosphite or ester antioxidant.
8. The high-performance polypropylene composite material for injection molding of thin-walled parts according to claim 5, wherein: such other additives include combinations of one or more of colorants, nucleating agents, blowing agents, surfactants, plasticizers, coupling agents, flame retardants, light stabilizers, processing aids, antistatic aids, antimicrobial aids, and lubricants as deemed desirable by one skilled in the art.
9. A process for the preparation of a high performance polypropylene composite useful for injection molding of thin walled parts according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
1) weighing the raw materials according to the weight ratio;
2) dry-mixing polypropylene, high-performance inorganic filler, elastomer toughening agent, stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes, adding the mixed raw materials into a double-screw extruder, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
10. A process for the preparation of a high performance polypropylene composite useful for injection molding of thin walled parts according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
1) weighing the raw materials according to the weight ratio;
2) dry-mixing polypropylene, an elastomer toughening agent, a stabilizer and other auxiliaries in a high-speed mixer for 3-15 minutes to prepare a mixture A, adding the mixture A into a double-screw extruder from a main screw feeding port, adding a high-performance inorganic filler into the double-screw extruder from the middle side of a screw to a feeding port, and cooling and granulating after melt extrusion; wherein the temperature in the screw cylinder is as follows: the first zone is 190-.
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| CN106117814A (en) * | 2016-06-23 | 2016-11-16 | 浙江普利特新材料有限公司 | A kind of automotive upholstery microporous foam PP composite material and preparation method thereof |
| CN106675060A (en) * | 2016-12-05 | 2017-05-17 | 钦州市钦南区生产力促进中心 | Ternary composite material and preparation method thereof |
| CN106751353A (en) * | 2016-12-26 | 2017-05-31 | 重庆普利特新材料有限公司 | A kind of low-density that can be used for thin-walled property moulding, high-performance polypropylene compound material and preparation method thereof |
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| CN108192262A (en) * | 2017-12-26 | 2018-06-22 | 浙江普利特新材料有限公司 | A kind of high tenacity, high convergency, high-flowability polypropylene composite material and preparation method thereof |
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| CN106117814A (en) * | 2016-06-23 | 2016-11-16 | 浙江普利特新材料有限公司 | A kind of automotive upholstery microporous foam PP composite material and preparation method thereof |
| CN106675060A (en) * | 2016-12-05 | 2017-05-17 | 钦州市钦南区生产力促进中心 | Ternary composite material and preparation method thereof |
| CN106751353A (en) * | 2016-12-26 | 2017-05-31 | 重庆普利特新材料有限公司 | A kind of low-density that can be used for thin-walled property moulding, high-performance polypropylene compound material and preparation method thereof |
| CN108084562A (en) * | 2017-12-20 | 2018-05-29 | 会通新材料股份有限公司 | A kind of thin-walled property PP composite material of good appearance and preparation method thereof |
| CN108192262A (en) * | 2017-12-26 | 2018-06-22 | 浙江普利特新材料有限公司 | A kind of high tenacity, high convergency, high-flowability polypropylene composite material and preparation method thereof |
| CN108384124A (en) * | 2018-03-03 | 2018-08-10 | 中山市点石塑胶有限公司 | A kind of low density and high performance PP composite material and preparation method thereof can be used for being thinning moulding |
| CN108546385A (en) * | 2018-03-13 | 2018-09-18 | 上海普利特复合材料股份有限公司 | A kind of automobile seamless gasbag instrument board high-performance polypropylene compound material and preparation method thereof |
| CN110655719A (en) * | 2018-06-29 | 2020-01-07 | 合肥杰事杰新材料股份有限公司 | High-rigidity high-toughness low-density polypropylene composition and preparation method thereof |
| CN109181110A (en) * | 2018-09-30 | 2019-01-11 | 南京聚隆科技股份有限公司 | A kind of thin-walled air conditioning for automobiles material and preparation method thereof |
| CN109438900A (en) * | 2018-10-24 | 2019-03-08 | 成都金发科技新材料有限公司 | A kind of PP composite material and preparation method thereof |
| CN109438900B (en) * | 2018-10-24 | 2021-06-08 | 成都金发科技新材料有限公司 | Polypropylene composite material and preparation method thereof |
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| CN113372651A (en) * | 2021-07-16 | 2021-09-10 | 北海市传创环保科技有限公司 | High-strength and high-toughness polypropylene injection molding material |
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Application publication date: 20160504 |