CN106280013B - Polypropylene composition for seamless air bag instrument panel and preparation method thereof - Google Patents
Polypropylene composition for seamless air bag instrument panel and preparation method thereof Download PDFInfo
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- CN106280013B CN106280013B CN201510325413.1A CN201510325413A CN106280013B CN 106280013 B CN106280013 B CN 106280013B CN 201510325413 A CN201510325413 A CN 201510325413A CN 106280013 B CN106280013 B CN 106280013B
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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
- 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
- C08L23/14—Copolymers of propene
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Air Bags (AREA)
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Abstract
The invention provides a polypropylene composition for a seamless air bag instrument panel and a preparation method thereof, wherein the composition is prepared from 52-66 parts of polypropylene, 5-10 parts of polyethylene, 10-15 parts of a toughening agent, 1-4 parts of maleic anhydride grafted polypropylene, 15-25 parts of a mineral filler and 0.6-1.0 part of other additives. The polypropylene composition prepared by the invention has good rigidity, impact resistance, particularly low-temperature impact resistance, dimensional stability, low glossiness, stress whitening resistance and lower cost, meets the requirements of laser weakening process and glossiness reduction, well meets the requirements of future seamless airbag instrument panel parts on plastic materials, and is suitable for seamless airbag instrument panels produced by the laser weakening process.
Description
Technical Field
The invention belongs to the technical field of polymers, and relates to a polypropylene composition for a seamless air bag instrument panel and a preparation method thereof.
Background
In recent years, with the requirement of light weight of automobiles and the development of plastic modification industries, plastic materials are increasingly applied to industries such as automobiles, electronic appliances, household appliances and the like to meet the requirements of light weight, energy conservation and emission reduction. Polypropylene (PP) is widely used in interior and exterior automotive parts, for example, due to its advantages of small specific gravity, low price, convenient molding, recoverability, good chemical stability, etc.: bumpers, door panels, dashboards, pillars, steering wheels, glove compartments, armrests, and the like.
With the continuous development of the automobile industry, automobiles are not only walking tools, but also the requirements of people on the aesthetic property, the comfort level and the safety of the automobiles are stronger and stronger. The automobile instrument panel is an important part of an automobile internal structure, and has the functions of supporting the instrument and decorating and protecting the safety of personnel in the automobile in case of collision and other dangerous conditions. At present, many automobiles are provided with an airbag cover plate on an instrument panel and an airbag is arranged at the bottom of the airbag cover plate so as to ensure the safety of personnel in the automobile when collision occurs, but the combined instrument panel is complex to install and affects the attractiveness, and does not meet the requirement of people on the attractiveness of the automobile. In addition, the automobile instrument panel part is used as a decorative interior trim part and the position of the decorative interior trim part, and the instrument panel material is required to have lower glossiness so as to meet the requirement of comfort level that a driver does not generate visual fatigue when driving, and meanwhile, the instrument panel is required not to generate sharp fragments so as to avoid secondary injury of personnel when blasting. Based on the above situation, it is desirable to prepare a material which has low gloss, high impact resistance, especially high and low temperature impact resistance, and is suitable for forming seamless airbag instrument panels, and which meets the process requirements for laser weakening in the preparation of seamless airbag instrument panels.
Disclosure of Invention
The invention aims to provide a polypropylene composition for a seamless air bag instrument panel and a preparation method thereof.
The technical scheme of the invention is as follows:
the polypropylene composition for the seamless air bag instrument panel is prepared from the following components in parts by weight:
in a further scheme, the polypropylene is at least one selected from copolymerized polypropylene with the melt index of 15-40 g/10min under the conditions of the temperature of 230 ℃ and the load of 2.16 kg.
The polyethylene is high-density polyethylene.
The toughening agent is an ethylene-octene copolymer.
The grafting rate of the maleic anhydride grafted polypropylene is 0.4-1%.
The mineral filler is formed by compounding talcum powder and calcium carbonate according to the weight ratio of 2: 1.
The other auxiliary agent is at least one of antioxidant, light stabilizer, lubricant and nucleating agent.
Wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant, the main antioxidant is tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010 for short), and the auxiliary antioxidant is tris [2, 4-di-tert-butylphenyl ] phosphite ester (antioxidant 168 for short);
the light stabilizer is a hindered amine light stabilizer 944, the chemical name of which is (poly- { [6- [ (1,1,3, 3-tetramethylbutyl) -imino ] -1,3, 5-triazine-2, 4-diyl ] [2- (2,2,6, 6-tetramethylpiperidinyl) -amino ] -hexylene- [4- (2,2,6, 6-tetramethylpiperidinyl) -imino ] });
the lubricant is calcium stearate, and the nucleating agent is an aromatic amide compound β nucleating agent TMB-5.
The invention also aims to provide a method for preparing the polypropylene composition, which comprises the steps of adding the polypropylene, the polyethylene, the toughening agent, the maleic anhydride grafted polypropylene and other auxiliaries into a high-speed mixer together according to the proportion, and premixing for 3-4 minutes; adding the mineral filler into a high-speed mixer according to the proportion and mixing for 4-5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition.
The temperature of each area of the double-screw extruder is 175-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.08 MPa-0.1 MPa.
The polypropylene composition has good rigidity, impact resistance, particularly low-temperature impact resistance, size stability, low gloss, stress whitening resistance and lower cost.
The polypropylene composition has low glossiness, good toughness, particularly good low-temperature toughness, is suitable for a laser weakening process and a cavity weakening process, is suitable for forming seamless air bag instrument panels, has small density and stable size, meets the requirements of the seamless air bag instrument panels on plastic materials, and has good application prospect.
The invention has the following advantages and beneficial effects:
1. the polypropylene composition of the invention is added with inorganic mineral fillers in a fixed proportion, and the compounding proportion of the talcum powder and the calcium carbonate is 2:1, the requirement of the laser weakening process is well met.
2. The polypropylene composition has high impact, high rigidity, low glossiness and stress whitening resistance, and is suitable for laser weakening processes.
3. The invention has the advantages of simple production process flow, continuous production process, high production efficiency and stable product quality.
4. The polypropylene base material has the advantages of improved size stability, good comprehensive performance, low cost and good application prospect, and can be used for seamless air bag instrument panels.
Detailed Description
The present invention will be further described with reference to the following examples, in which the starting materials are commercially available.
Wherein the melt index of the polypropylene copolymer 1 is 40g/10min (the temperature is 230 ℃, and the load is 2.16 kg);
the melt index of the polypropylene copolymer 2 is 30g/10min (the temperature is 230 ℃ and the load is 2.16 kg);
the melt index of the polypropylene copolymer 3 is 15g/10min (the temperature is 230 ℃, and the load is 2.16 kg);
the melt index of the polypropylene copolymer 4 was 12g/10min (temperature 230 ℃ C., load 2.16 kg).
Example 1
Adding 18 parts of polypropylene copolymer 1, 48 parts of polypropylene copolymer 3,5 parts of high-density polyethylene, 13 parts of toughening agent ethylene-octene copolymer, 1 part of maleic anhydride grafted polypropylene with a grafting rate of 0.7%, 0.15 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.1 part of light stabilizer 944 and 0.2 part of lubricant calcium stearate into a high-speed mixer for mixing for 3 minutes, and adding 15 parts of a compound of 2500-mesh talcum powder and 2500-mesh calcium carbonate in a ratio of 2:1 into the high-speed mixer for mixing for 5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition. Wherein the temperature of each zone of the double-screw extruder is 175-195-190-195-205-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.08 MPa.
Example 2
Adding 56 parts of polypropylene copolymer 2, 10 parts of high-density polyethylene, 10 parts of toughening agent ethylene-octene copolymer, 4 parts of maleic anhydride grafted polypropylene with a grafting rate of 0.7%, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.2 part of light stabilizer 944, 0.2 part of lubricant calcium stearate and 0.2 part of nucleating agent TMB-5 into a high-speed mixer for mixing for 4 minutes, and adding 20 parts of a compound of 2500-mesh talcum powder and 2500-mesh calcium carbonate in a ratio of 2:1 into the high-speed mixer for further mixing for 5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition. Wherein the temperature of each zone of the double-screw extruder is 175-195-190-195-205-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.09 MPa.
Example 3
Adding 16 parts of polypropylene copolymer 1, 41 parts of polypropylene copolymer 2,6 parts of high-density polyethylene, 15 parts of toughening agent ethylene-octene copolymer, 2 parts of maleic anhydride grafted polypropylene with a grafting rate of 0.7%, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168 and 0.2 part of light stabilizer 944 into a high-speed mixer, mixing for 4 minutes, adding 20 parts of a compound of 2500-mesh talcum powder and 2500-mesh calcium carbonate in a ratio of 2:1 into the high-speed mixer, and mixing for 5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition. Wherein the temperature of each area of the double-screw extruder is 175-195-190-195-205-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.1 MPa.
Example 4
Adding 14 parts of polypropylene copolymer 1, 38 parts of polypropylene copolymer 2, 9 parts of high-density polyethylene, 11 parts of toughening agent ethylene-octene copolymer, 3 parts of maleic anhydride grafted polypropylene with a grafting rate of 0.7%, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.15 part of light stabilizer 944 and 0.2 part of lubricant calcium stearate into a high-speed mixer for mixing for 4 minutes, and adding 25 parts of a compound of 2500-mesh talcum powder and 2500-mesh calcium carbonate in a ratio of 2:1 into the high-speed mixer for mixing for 5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition. Wherein the temperature of each zone of the double-screw extruder is 175-195-190-195-205-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.08 MPa.
Comparative example 1
Adding 64 parts of copolymerized polypropylene 4, 16 parts of toughening agent ethylene-propylene copolymer, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168 and 0.2 part of light stabilizer 944 into a high-speed mixer, mixing for 4 minutes, adding 20 parts of 2500-mesh talcum powder into a high-speed mixer, and mixing for 5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition. Wherein the temperature of each zone of the double-screw extruder is 175-195-190-195-205-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.08 MPa.
Performance evaluation method and use standard:
the comprehensive mechanical properties of the material are evaluated by testing the melt index, tensile strength, bending modulus, 23 ℃ cantilever beam notch impact strength, 25 ℃ cantilever beam notch impact strength, density and glossiness according to the ASTM standard:
the formulations of examples 1-4 are shown in Table 1 below, and the results of the various performance tests are shown in Table 2 below.
Table 1: formulation composition
Table 2: performance testing
As can be seen from Table 2, the polypropylene composition prepared by the invention has low glossiness, good toughness, especially good low-temperature toughness, is suitable for laser weakening process and is suitable for forming seamless air bag instrument panels; meanwhile, the polypropylene composition has small density and stable size, meets the requirement of seamless air bag instrument panels on plastic materials, and has good application prospect.
The embodiments described above are presented to enable those skilled in the art to make and use the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (6)
1. A polypropylene composition for seamless airbag instrument panels, characterized in that: the composition is prepared from the following components in parts by weight:
52-66 Parts of Polypropylene (PP),
5-10 parts of polyethylene,
10-15 parts of a toughening agent,
1-4 parts of maleic anhydride grafted polypropylene,
15-25 parts of mineral filler,
0.6 to 1.0 portion of other additives,
the polypropylene is at least one of copolymerized polypropylene with the melt index of 15-40 g/10min under the conditions of 230 ℃ and 2.16kg of load;
the polyethylene is high-density polyethylene;
the mineral filler is formed by compounding talcum powder and calcium carbonate according to the weight ratio of 2:1, and the particle size of the talcum powder and the calcium carbonate is 2500 meshes.
2. The polypropylene composition according to claim 1, wherein: the toughening agent is an ethylene-octene copolymer.
3. The polypropylene composition according to claim 1, wherein: the grafting rate of the maleic anhydride grafted polypropylene is 0.4-1%.
4. The polypropylene composition according to claim 1, wherein: the other auxiliary agent is at least one of antioxidant, light stabilizer, lubricant and nucleating agent.
5. A process for preparing a polypropylene composition according to any one of claims 1 to 4, wherein: adding polypropylene, polyethylene, a toughening agent, maleic anhydride grafted polypropylene and other auxiliaries into a high-speed mixer together according to the proportion, and premixing for 3-4 minutes; adding the mineral filler into a high-speed mixer according to the proportion and mixing for 4-5 minutes; and then the mixture is put into a double-screw extruder for extrusion and granulation to obtain the polypropylene composition.
6. The method for preparing a polypropylene composition according to claim 5, wherein: the temperature of each area of the double-screw extruder is 175-215 ℃, the head temperature is 215 ℃, and the vacuum degree is-0.08 MPa-0.1 MPa.
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| CN201510325413.1A CN106280013B (en) | 2015-06-11 | 2015-06-11 | Polypropylene composition for seamless air bag instrument panel and preparation method thereof |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329567A (en) * | 2017-01-19 | 2018-07-27 | 合肥杰事杰新材料股份有限公司 | A kind of matt master and preparation method thereof with toughening effect |
| CN107163391A (en) * | 2017-06-20 | 2017-09-15 | 苏州旭光聚合物有限公司 | Low-temperature impact-resistant modified polypropene |
| JP7024442B2 (en) * | 2018-01-24 | 2022-02-24 | Ｍｃｐｐイノベーション合同会社 | Thermoplastic Elastomer Composition for Airbag Storage Covers and Airbag Storage Covers |
| CN109721842A (en) * | 2018-12-29 | 2019-05-07 | 浙江普利特新材料有限公司 | A kind of automobile rigid plastic instrument board low gloss, high rigidity, high impact resistance polypropylene composite material and preparation method thereof |
| CN111763399B (en) * | 2020-07-20 | 2021-10-15 | 金发科技股份有限公司 | Automobile instrument panel polypropylene composite material and preparation method thereof |
| CN113549267A (en) * | 2021-07-09 | 2021-10-26 | 河北昆驰塑料制品有限公司 | Preparation method of polypropylene engineering plastic and polypropylene engineering plastic |
| CN114262486A (en) * | 2021-12-28 | 2022-04-01 | 会通新材料股份有限公司 | Low-temperature-toughness polypropylene composite material and preparation method and application thereof |
| CN115322491B (en) * | 2022-08-26 | 2023-05-16 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
| CN116496577B (en) * | 2023-05-15 | 2024-08-02 | 上海金发科技发展有限公司 | Talcum powder filled polypropylene composition and preparation method and application thereof |
Citations (2)
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| CN103131086A (en) * | 2011-12-02 | 2013-06-05 | 合肥杰事杰新材料股份有限公司 | Scraping-resistant polypropylene combination with good appearance and manufacturing method and application thereof |
| CN103524878A (en) * | 2013-10-22 | 2014-01-22 | 安徽江淮汽车股份有限公司 | Modified polypropylene composite material as well as preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131086A (en) * | 2011-12-02 | 2013-06-05 | 合肥杰事杰新材料股份有限公司 | Scraping-resistant polypropylene combination with good appearance and manufacturing method and application thereof |
| CN103524878A (en) * | 2013-10-22 | 2014-01-22 | 安徽江淮汽车股份有限公司 | Modified polypropylene composite material as well as preparation method and application thereof |
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