CN112574513B - Polypropylene composite material and preparation method and application thereof - Google Patents
Polypropylene composite material and preparation method and application thereof Download PDFInfo
- Publication number
- CN112574513B CN112574513B CN202011384230.4A CN202011384230A CN112574513B CN 112574513 B CN112574513 B CN 112574513B CN 202011384230 A CN202011384230 A CN 202011384230A CN 112574513 B CN112574513 B CN 112574513B
- Authority
- CN
- China
- Prior art keywords
- polypropylene
- parts
- polypropylene resin
- melt
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- C08L23/14—Copolymers of propene
-
- 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
-
- 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
Abstract
The invention discloses a polypropylene composite material, which comprises the following components in parts by weight: 20-100 parts of polypropylene resin B, 0-20 parts of elastomer, 0-20 parts of talcum powder and 0-2 parts of auxiliary agent; the polypropylene resin B is copolymerized polypropylene, the melt tension of the polypropylene resin B is 16-20mN, and the melt index of the polypropylene resin B is 20-50g/10 min. The invention can obviously improve the melt strength of the polypropylene material and obviously improve the surface pit phenomenon of the material under a special process by introducing the PP resin with different melt tension, and can be well used for preparing the automobile bumper part with shorter molding period. Meanwhile, the invention also discloses a preparation method and application of the polypropylene composite material.
Description
Technical Field
The invention relates to the field of modification of high polymer materials, in particular to a polypropylene composite material and a preparation method and application thereof.
Background
With the rapid increase of automobile output and social demand, energy conservation, environmental protection and low cost become the main targets of the current automobile industry development. The use of lightweight plastics for the manufacture of automotive parts, instead of metal, is an important means for the automotive industry to achieve the above goals. The bumper is one of the largest exterior trimming parts on the automobile, is arranged on the automobile as an independent assembly, and has great influence on the safety protection, the modeling effect, the aerodynamic performance and the like of the automobile. Polypropylene materials are widely used in automobile bumpers due to their excellent cost performance and light weight. The bumper is 4-5 kg in horizontal weight, large in size and weight and high in requirements on materials and forming processes. At present, more and more host plants continuously pursue a low molding cycle in order to improve the production efficiency, and the molding cycle is gradually reduced from the first 60-80 seconds to 30-40 seconds. When the traditional polypropylene is applied to a bumper with a low molding cycle, a plurality of round pits are easily generated on the surface of the traditional polypropylene, and the appearance and the yield of the bumper are greatly influenced. Therefore, there is a need in the art to develop a polypropylene material that can be used for rapid prototyping, for use in automobile bumpers.
Disclosure of Invention
Based on this, the present invention aims to overcome the defects of the prior art and provide a polypropylene composite material which can be used for rapid forming and has good appearance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a polypropylene composite material comprises the following components in parts by weight: 20-100 parts of polypropylene resin B, 0-20 parts of elastomer, 0-20 parts of talcum powder and 0-2 parts of auxiliary agent; the melt tension of the polypropylene resin B is 16-20mN, and the melt index of the polypropylene resin B at 230 ℃ and 2.16kg is 20-50g/10 min; the melt tension was measured using a melt extensional rheometer from Technology Ltd.
Preferably, the polypropylene composite material further comprises 0-100 parts by weight of polypropylene resin A, the polypropylene resin A is copolymerized polypropylene, the melt tension of the polypropylene resin A is 16-20mN, and the melt index of the polypropylene resin A at 230 ℃ and 2.16kg is 60-100g/10 min.
Preferably, the polypropylene composite material comprises the following components in parts by weight: 40-60 parts of polypropylene resin A, 20-40 parts of polypropylene resin B, 10-20 parts of elastomer, 10-20 parts of talcum powder and 0.5-2 parts of auxiliary agent.
Preferably, the elastomer is at least one of ethylene-butene copolymer and ethylene-octene copolymer elastomer.
More preferably, the elastomer has a melt index of 0.5 to 2g/10min at 230 ℃ under 2.16 kg.
Preferably, the auxiliary agent is at least one of an antioxidant, a light stabilizer and a lubricant.
More preferably, the antioxidant is a hindered phenol antioxidant and/or a phosphite antioxidant; specifically, the additive can be one or a mixture of two or more of 1010, 1076, 3114, 168 and PEP-36;
the light stabilizer is a hindered amine light stabilizer; specifically, the material can be one or a mixture of two or more of UV-3808PP5, LA-402XP and LA-402 AF;
the lubricant is a hard acid salt lubricant; specifically, it may be 2818 or 3818 or a mixture of both.
Meanwhile, the invention also discloses a preparation method of the polypropylene composite material, which comprises the following steps: uniformly mixing the components, adding the mixture into a double-screw extruder, carrying out melt mixing, and carrying out extrusion granulation to obtain the polypropylene composite material; wherein the temperature of the melt mixing is 190-210 ℃, and the rotating speed of the screw is 450-550 r/min.
In addition, the invention also discloses application of the polypropylene composite material in automobile bumpers.
Compared with the prior art, the invention has the beneficial effects that:
the invention can obviously improve the melt strength of the polypropylene material and the surface pit phenomenon of the material under a special process by introducing the PP resin with different melt strengths, and can be well used for preparing the automobile bumper part with shorter molding period.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. The following examples are merely exemplary of the present invention, and the scope of the present invention is not limited thereto.
The preparation method of the polypropylene composite material comprises the following steps:
uniformly mixing the components, adding the mixture into a double-screw extruder, carrying out melt mixing at the temperature of 190-210 ℃ and the screw rotation speed of 450-550 rpm, and carrying out extrusion granulation to obtain the polypropylene composite material.
Injection molding mold: 150 x 70mm high light color plate mold;
high light color plate mould: the size is 150 multiplied by 70 multiplied by 3 mm; the type of the injection molding machine: b, woundplast BS 80-III; injection molding conditions: the injection molding temperature is 200 ℃, the injection molding pressure is 45%, the pressure maintaining pressure is 55%, and the cooling time is 15 seconds; to reduce the molding cycle time, the aggravation process reduces the dwell time from the conventional 20s to 10 s.
The test method is as follows:
(1) melt tension: the melt extensional rheometer of the Technology Limited company is adopted for testing, and the maximum tension borne by the melt before the melt is in an unstable state in the extensional rheometry test is limited; the specific test conditions were: the temperature of a single-screw extruder is 200 ℃, the rotating speed of the screw of the extruder is 30rpm, the initial speed of a rotor is 60mm/min, and the acceleration of the rotor is 12 mm/s;
(2) evaluation of pits: performing injection molding evaluation on the pits and the shrinkage highlight color plate; the shrinkage is evaluated by visual qualitative parallel comparison, and pits are evaluated by statistical data; and (2) injection molding X high-light color plates under a specific process, wherein Y color plates have hollow pits inside, and the ratio (alpha) of the pit color plates is as follows: α ═ Y/X;
the main representative materials used in the examples and comparative examples are as follows:
polypropylene resin a 1: copolymerized polypropylene, melt tension 18mN, melt index (230 ℃, 2.16kg)100g/10min, Dada Dacron of the manufacturer;
polypropylene resin B1: the copolymerization polypropylene has the melt tension of 18 mN; melt index (230 ℃, 2.16kg) 30g/10min, Basel;
polypropylene resin a 2: the polypropylene copolymer has a melt tension of 14 mN; melt index (230 ℃, 2.16kg)100g/10min, Exxon Mobil;
polypropylene resin B2: the polypropylene copolymer has melt tension of 14mN, melt index (230 ℃, 2.16kg) of 30g/10min and Zhonghai Shell brand;
an elastomer A: ethylene-butene copolymer, melt index (230 ℃, 2.16kg) 0.5g/10min, Mitsui chemistry;
an elastomer B: ethylene-butene copolymer, melt index (230 ℃, 2.16kg) 4g/10min, Dow chemical;
talc powder: 3000 meshes, Liaoning as a source of supplement;
lubricant: zinc stearate lubricant, 2818, commercially available;
antioxidant: hindered phenolic antioxidants, 1010, commercially available;
light stabilizer: hindered amine light stabilizers, UV-3808PP5, commercially available;
according to the method, the examples 1-7 and the comparative examples 1-3 are set, the polypropylene composite material is prepared according to all the formulas by the method, and then the composite material is subjected to injection molding according to the injection molding process to form a color plate for representing the pit condition of the material and simultaneously test the melt strength of the material; the components and properties of the polypropylene composite materials of the specific examples 1 to 7 and the comparative examples 1 to 3 are shown in Table 1.
TABLE 1 ingredients and Properties of Polypropylene composite materials in examples 1-7 and comparative examples 1-3
As can be seen from Table 1, compared with comparative examples 1 to 3, the polypropylene composite materials obtained in examples 1 to 4 of the present invention have fewer appearance pits and high melt tension; comparing comparative example 1 with example 1, it can be seen that comparative example 1 does not contain the polypropylene resin B of the present application, and has a large number of apparent depressions and a low melt tension.
Comparing example 1 with example 2, it can be seen that the melt index of the elastomer in example 2 is not in the range of 0.5-2g/10 min; compared with example 1, the polypropylene composite material obtained in example 2 has more pits in appearance and low melt tension.
Comparing example 1 with example 3, it can be seen that the melt tension of the polypropylene resin A in example 3 is not in the range of 16-20 mN; compared with example 1, the polypropylene composite material obtained in example 3 has more pits in appearance and low melt tension.
As is clear from comparison of examples 1, 4 and 5 with examples 6 and 7, in examples 1, 4 and 5, the ranges of "polypropylene resin A40 to 60 parts, polypropylene resin B20 to 40 parts, elastomer 10 to 20 parts, talc 10 to 20 parts and auxiliary agent 0.5 to 2 parts" are included, and examples 6 and 7 are not included, and the appearance pits are small and the melt tension is high in examples 1, 4 and 5.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The polypropylene composite material is characterized by comprising the following components in parts by weight: 40-60 parts of polypropylene resin A, 20-40 parts of polypropylene resin B, 10-20 parts of elastomer, 10-20 parts of talcum powder and 0.5-2 parts of auxiliary agent; the polypropylene resin B is copolymerized polypropylene, and the melt tension of the polypropylene resin B is 16-20 mN; the melt index of the polypropylene resin B at 230 ℃ and 2.16kg is 20-50g/10 min; the polypropylene resin A is copolymerized polypropylene, the melt tension of the polypropylene resin A is 16-20mN, and the melt index of the polypropylene resin A at 230 ℃ and 2.16kg is 60-100g/10 min; the melt index of the elastomer at 230 ℃ under 2.16kg is 0.5-2g/10 min.
2. The polypropylene composite of claim 1, wherein the elastomer is at least one of an ethylene-butene copolymer elastomer and an ethylene-octene copolymer elastomer.
3. The polypropylene composite of claim 1, wherein the auxiliary agent is at least one of an antioxidant, a light stabilizer, and a lubricant.
4. The polypropylene composite of claim 3, wherein the antioxidant is a hindered phenolic antioxidant and/or a phosphite antioxidant; the light stabilizer is a hindered amine light stabilizer; the lubricant is a hard acid salt lubricant.
5. A method for preparing a polypropylene composite according to any one of claims 1 to 4, wherein the method comprises: uniformly mixing the components, adding the mixture into a double-screw extruder, carrying out melt mixing, and carrying out extrusion granulation to obtain the polypropylene composite material; wherein the temperature of the melt mixing is 190-210 ℃, and the rotating speed of the screw is 450-550 r/min.
6. Use of a polypropylene composite according to any one of claims 1 to 4 in automotive bumpers.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011384230.4A CN112574513B (en) | 2020-11-30 | 2020-11-30 | Polypropylene composite material and preparation method and application thereof |
| PCT/CN2021/092818 WO2022110669A1 (en) | 2020-11-30 | 2021-05-10 | Polypropylene composite material, preparation method therefor, and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011384230.4A CN112574513B (en) | 2020-11-30 | 2020-11-30 | Polypropylene composite material and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112574513A CN112574513A (en) | 2021-03-30 |
| CN112574513B true CN112574513B (en) | 2022-05-10 |
Family
ID=75126592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011384230.4A Active CN112574513B (en) | 2020-11-30 | 2020-11-30 | Polypropylene composite material and preparation method and application thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112574513B (en) |
| WO (1) | WO2022110669A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112574513B (en) * | 2020-11-30 | 2022-05-10 | 金发科技股份有限公司 | Polypropylene composite material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255191A (en) * | 2007-04-03 | 2008-10-23 | Sumitomo Chemical Co Ltd | Polypropylene resin composition for foaming and foam-molded article made therefrom |
| CN102649854A (en) * | 2011-02-23 | 2012-08-29 | 中国科学院化学研究所 | Polypropylene composition and preparation method thereof |
| CN107987449A (en) * | 2017-12-15 | 2018-05-04 | 会通新材料股份有限公司 | A kind of micro-foaming polypropylene composite material for bumper and preparation method thereof |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112574513B (en) * | 2020-11-30 | 2022-05-10 | 金发科技股份有限公司 | Polypropylene composite material and preparation method and application thereof |
-
2020
- 2020-11-30 CN CN202011384230.4A patent/CN112574513B/en active Active
-
2021
- 2021-05-10 WO PCT/CN2021/092818 patent/WO2022110669A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255191A (en) * | 2007-04-03 | 2008-10-23 | Sumitomo Chemical Co Ltd | Polypropylene resin composition for foaming and foam-molded article made therefrom |
| CN102649854A (en) * | 2011-02-23 | 2012-08-29 | 中国科学院化学研究所 | Polypropylene composition and preparation method thereof |
| CN107987449A (en) * | 2017-12-15 | 2018-05-04 | 会通新材料股份有限公司 | A kind of micro-foaming polypropylene composite material for bumper and preparation method thereof |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112574513A (en) | 2021-03-30 |
| WO2022110669A1 (en) | 2022-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103030883A (en) | Polypropylene composite material capable of quick injection molding and preparation method thereof | |
| CN112552605B (en) | Polypropylene composite material with good dermatoglyph replication capability and preparation method thereof | |
| CN112574513B (en) | Polypropylene composite material and preparation method and application thereof | |
| CN110862598B (en) | 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material and preparation method thereof | |
| CN106189026A (en) | One exempts from spraying, weather-proof high light PMMA alloy material and preparation method thereof | |
| CN111592715B (en) | High-fineness extrusion-grade modified polypropylene material and automobile outer water cutter | |
| CN110862616A (en) | Formula and preparation method of scratch-resistant metal texture spraying-free PP composite material | |
| CN105385058A (en) | Low-internal-stress heat-resistant ABS resin and preparation method thereof | |
| CN105367904A (en) | Novel high-fluidity low-shrinkage composite polypropylene auto-material and preparation method thereof | |
| CN115386166B (en) | Polypropylene composite material, and preparation method and application thereof | |
| CN111087703A (en) | High-brightness black scratch-resistant thin-walled polypropylene composite material and preparation method thereof | |
| CN106046532A (en) | Multi-applicability elastomer for automobile quarter window and injection molding method using same | |
| CN108707279A (en) | A kind of eutectic lapping defect exempts from spray coating polypropylene composite material and preparation method without current mark | |
| CN102827431B (en) | High-strength halogen-containing flame-retardant long-glass-fiber-reinforced AS (acrylonitrile-styrene) composite material and preparation method thereof | |
| CN106317749A (en) | Stress-whitening-resistant styrene resin and preparation method thereof | |
| CN113234241B (en) | Preparation method of high-performance polypropylene master batch | |
| CN112321982A (en) | Ageing-resistant HIPS foamed plastic | |
| CN107254131A (en) | A kind of solvent resistance bloom exempts from spraying PMMA alloy material and preparation method thereof | |
| CN114539678A (en) | Energy-saving regenerated polypropylene composite material and preparation method thereof | |
| CN110903567B (en) | Modified ASA material for vehicle and preparation method thereof | |
| CN108219291B (en) | Polypropylene resin suitable for preparing hollow product by blow molding process and preparation method thereof | |
| CN113121939A (en) | Composite resin material, preparation method thereof and automobile part | |
| CN109320827B (en) | Polyethylene resin suitable for preparing blow molding tray and preparation method and application thereof | |
| CN110951168A (en) | Modified polypropylene composite material for automobile bumper and preparation method thereof | |
| CN108276657B (en) | High-rigidity low-warpage polypropylene modified plastic and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |