CN112608552A - Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof - Google Patents
Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof Download PDFInfo
- Publication number
- CN112608552A CN112608552A CN202011557818.5A CN202011557818A CN112608552A CN 112608552 A CN112608552 A CN 112608552A CN 202011557818 A CN202011557818 A CN 202011557818A CN 112608552 A CN112608552 A CN 112608552A
- Authority
- CN
- China
- Prior art keywords
- polypropylene
- parts
- low
- polyethylene
- antioxidant
- 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.)
- Withdrawn
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
-
- 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
- C08L2207/066—LDPE (radical process)
Abstract
The invention discloses a polypropylene composite material with high glossiness and good low-temperature toughness, which is prepared from the following raw materials in parts by weight: 52-66 parts of polypropylene, 5-10 parts of polyethylene, 10-15 parts of toughening agent, 1-5 parts of crosslinking agent, 1-4 parts of maleic anhydride grafted polypropylene, 15-25 parts of mineral filler, 0.2-0.5 part of antioxidant, 0.1-0.3 part of light stabilizer and 0.1-0.3 part of lubricant. According to the invention, a specific sulfur vulcanization composition is adopted to crosslink ethylene propylene diene monomer, and the polypropylene is modified by combining a mixture of low-density polyethylene, linear low-density polyethylene and metallocene modified polyethylene in a specific mass ratio, wherein the dosage of the linear low-density polyethylene and the metallocene modified polyethylene is slightly higher than that of the low-density polyethylene, so that the compatibility of a system is further improved, the strength and toughness, especially the low-temperature toughness, of the polypropylene material are greatly improved, and the surface gloss is synergistically improved.
Description
Technical Field
The invention belongs to the technical field of polymer composite materials, and particularly relates to a polypropylene composite material with high glossiness and good low-temperature toughness and a preparation method thereof.
Background
At present, plastics are widely applied, for example, polypropylene is widely applied to the fields of automobile interior and exterior trimming parts, electronic products and the like. The polypropylene is a general plastic with wide application, is polymerized by propylene monomers, is abbreviated as PP in English, has a melting point of 165-175 ℃, and belongs to semi-crystalline plastics. Among many resin base materials, polypropylene has outstanding properties such as low price, wide source, low density, good mechanical balance, easy processing, chemical corrosion resistance, good weather resistance and the like, and is widely applied. The polypropylene resins are mainly classified into two categories, copolymerization and homopolymerization, according to the polymerization method and the arrangement form of molecular chain segments.
Since the common polypropylene resin is difficult to meet the application requirements of various industries, the modified polypropylene material has been widely used. The mineral filled polypropylene has the characteristics of low density, excellent mechanical property, corrosion resistance, environmental protection, low price, benefit for recycling and the like, has comprehensive properties which cannot be compared with other resins, and is widely applied to interior and exterior trimming parts of automobiles at present. However, the gloss of the common inorganic powder filled polypropylene material is greatly reduced, and some automobile main engine factories have higher requirements on the gloss of automobile parts, especially interior decorations. Meanwhile, in the modified polypropylene industry, how to increase the toughness of the modified polypropylene material is a great technical problem. Currently, the predominant toughened polypropylene composite is ethylene-octene random copolymer. The reason is that the ethylene-octene random copolymer has good toughening effect and high cost performance, so the ethylene-octene random copolymer is widely applied to the polypropylene modification industry, especially to the automobile polypropylene modified material. However, the ethylene-octene random copolymer has a low melting point and high requirements for the manufacturing process, and the polypropylene composite material prepared by the method has good toughness but low comprehensive performance.
At present, although the modified polypropylene in the prior art has a certain improvement on the toughness of the material. However, these modified polypropylenes generally suffer from the disadvantage of poor gloss. For example, the prior art discloses some technical proposals related to enhancing the low-temperature toughness of polypropylene, for example, Chinese patent application with publication No. CN 106280013A, discloses a polypropylene composition for seamless airbag instrument panels 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 toughening agent, 1-4 parts of maleic anhydride grafted polypropylene, 15-25 parts of mineral filler and 0.6-1.0 part of other auxiliary agents. The polypropylene composition prepared by the invention has good rigidity, impact resistance, especially low-temperature impact resistance, dimensional stability, low glossiness, stress whitening resistance and lower cost. However, the polypropylene material has low glossiness, and cannot meet the requirement of high-glossiness application occasions. Therefore, the research and development of the polypropylene composite material with high glossiness and good low-temperature toughness has important application value.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a polypropylene composite material with high glossiness and good low-temperature toughness and a preparation method thereof. In order to realize the purpose, the invention adopts the following technical scheme:
a polypropylene composite material with high glossiness and good low-temperature toughness is prepared from the following raw materials in parts by weight:
52-66 parts of polypropylene
5-10 parts of polyethylene
10-15 parts of toughening agent
1-5 parts of cross-linking agent
1-4 parts of maleic anhydride grafted polypropylene
15-25 parts of mineral filler
0.2 to 0.5 portion of antioxidant
0.1 to 0.3 portion of light stabilizer
0.1 to 0.3 portion of lubricant
Preferably, the polypropylene is one or a mixture of homo-polypropylene and co-polypropylene, and the melt index of the polypropylene at 230 ℃ and 2.16Kg is 5-30g/10 min;
preferably, the polyethylene is a mixture of low density polyethylene, linear low density polyethylene and metallocene modified polyethylene, and the mass ratio of the low density polyethylene to the linear low density polyethylene is 1: 1-3: 3-5;
preferably, the toughening agent is ethylene propylene diene monomer;
preferably, the cross-linking agent is a mixture of sulfur, tetramethylthiuram disulfide and dibenzothiazyl disulfide, and the mass ratio of the sulfur to the tetramethylthiuram disulfide to the dibenzothiazyl disulfide is 1-3: 3-5: 1;
preferably, the grafting rate of the maleic anhydride grafted polypropylene is 0.5-1.2%, and the melt index under the conditions of 230 ℃ and 2.16Kg is 30-40g/10 min;
preferably, the mineral filler is a mixture of talcum powder and calcium carbonate, the mass ratio of the talcum powder to the calcium carbonate is 1-3:1, and the particle size is 2500 meshes;
preferably, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the mass ratio of the antioxidant to the antioxidant is 1: 1;
preferably, the light stabilizer is a hindered amine light stabilizer 944;
preferably, the lubricant is calcium stearate.
The preparation method of the polypropylene composite material comprises the following steps:
(1) weighing the raw materials according to the proportion, adding the raw materials into a high-speed mixer, wherein the mixing speed is 200-;
(2) the mixed raw materials are placed in a double-screw extruder for melting, extruding and granulating, wherein the double-screw extruder is divided into ten areas from a feeding section to a machine head, the temperature from the first area to the tenth area is 170-.
The invention improves the prior art, improves the normal temperature toughness and the low temperature toughness of the polypropylene by dynamically vulcanizing the ethylene propylene diene monomer, and simultaneously utilizes the respective characteristics of different types of polyethylene resin to carry out compounding, such as long branched chains in a macromolecular chain of low-density polyethylene and good processing performance; linear low density polyethylene has short chain branches, and although the transparency is inferior to that of low density polyethylene, the mechanical properties are better, and particularly the low temperature resistance and the environmental stress cracking resistance are better than those of high density polyethylene; the metallocene modified polyethylene has more uniform property, good impact property and the like, and the compounding of the polyethylene effectively avoids the defects of high density polyethylene, high melt viscosity, and easy melt fracture phenomenon in the forming process to reduce the strength of the product. Through research, the invention discovers that the ethylene propylene diene monomer is crosslinked by adopting a specific sulfur vulcanization composition, and the polypropylene is modified by combining a mixture of low-density polyethylene, linear low-density polyethylene and metallocene modified polyethylene in a specific mass ratio, wherein the dosage of the linear low-density polyethylene and the metallocene modified polyethylene is slightly higher than that of the low-density polyethylene, so that the compatibility of a system is further improved, the strength and toughness, especially the low-temperature toughness of a polypropylene material are greatly improved, the surface gloss is synergistically improved, and the application field of the material is expanded.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to illustrate further features and advantages of the invention, and not to limit the scope of the claims.
Example 1:
a polypropylene composite material with high glossiness and good low-temperature toughness is prepared from the following raw materials in parts by weight:
60 parts of polypropylene, 7 parts of polyethylene, 12 parts of toughening agent, 2 parts of cross-linking agent, 3 parts of maleic anhydride grafted polypropylene, 20 parts of mineral filler, 0.3 part of antioxidant, 0.1 part of light stabilizer and 0.2 part of lubricant;
the polypropylene adopts Shanghai petrochemical M700R; the polyethylene is a mixture of Ullin Shenhua LDPE 2426K, Shanghai Sicaceae LL0220KJ and Exxon chemical MLLDPE 3518CB, and the mass ratio of the three components is 1: 2: 3; the toughening agent is Jilin petrochemical EPDM 4045; the cross-linking agent is a mixture of sulfur, tetramethyl thiuram disulfide and dibenzothiazyl disulfide, and the mass ratio of the sulfur to the tetramethyl thiuram disulfide to the dibenzothiazyl disulfide is 3: 1: 1; the grafting rate of the maleic anhydride grafted polypropylene is 1.2%, and the melt index under the conditions of 230 ℃ and 2.16Kg is 30g/10 min; the mineral filler is a mixture of talcum powder and calcium carbonate, the mass ratio of the talcum powder to the calcium carbonate is 1:1, and the particle size is 2500 meshes; the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant to the antioxidant is 1: 1; the light stabilizer is light stabilizer 944; the lubricant is calcium stearate.
The preparation method of the polypropylene composite material comprises the following steps:
(1) weighing the raw materials according to the proportion, adding the raw materials into a high-speed mixer, wherein the mixing speed is 300 revolutions per minute, and the mixing time is 5 minutes;
(2) and (2) putting the mixed raw materials into a double-screw extruder for melt extrusion granulation, wherein the double-screw extruder is divided into ten regions from a feeding section to a machine head, the temperature from the first region to the tenth region is 175 ℃, 200 ℃, 205 ℃, 210 ℃, 215 ℃, 220 ℃, 215 ℃ and 215 ℃ in sequence, the screw diameter of the double-screw extruder is 42mm, and the length-diameter ratio is 30.
Comparative example 1:
a polypropylene composite was prepared as in example 1, except that the polyethylene was zhonghai shell HDPE 5621D.
Comparative example 2:
the preparation method of the polypropylene composite material is the same as that of example 1, and the only difference is that the polyethylene is a mixture of Ullin Shenhua LDPE 2426K, Shanghaineco LL0220KJ and Exxon chemical MLLDPE 3518CB, and the mass ratio of the three is 1: 1: 1.
comparative example 3:
the preparation method of the polypropylene composite material is the same as that of example 1, and the only difference is that the cross-linking agent is a mixture of dicumyl peroxide and bismaleimide, and the mass ratio of the dicumyl peroxide to the bismaleimide is 1: 5.
comparative example 4:
the preparation method of the polypropylene composite material is the same as that of example 1, and the only difference is that the cross-linking agent is a mixture of sulfur, tetramethylthiuram disulfide and dibenzothiazyl disulfide, and the mass ratio of the sulfur to the tetramethylthiuram disulfide to the dibenzothiazyl disulfide is 4: 2: 1.
comparative example 5:
the preparation method of the polypropylene composite material is the same as that of example 1, and the only difference is that the cross-linking agent is a mixture of sulfur, tetramethylthiuram disulfide and dibenzothiazyl disulfide, and the mass ratio of the sulfur to the tetramethylthiuram disulfide to the dibenzothiazyl disulfide is 1: 1: 1.
comparative example 6:
the preparation method of the polypropylene composite material is the same as that of example 1, and the only difference is that the polypropylene composite material does not contain a cross-linking agent, and the toughening agent is Dow POE 8150.
Comparative tests of the properties of the polypropylene composites obtained in inventive example 1 and comparative examples 1 to 6:
1. the tensile strength (MPa) was measured according to GB/T1040-2006 "determination of tensile Properties of plastics", using type I specimen at a tensile speed of 50 mm/min.
2. Notched impact strength was measured at 23 ℃ and-30 ℃ according to GB/T1843-2008 "determination of Plastic Izod impact Strength", sample size: 80 mm × 10 mm × 4 mm, the radius of the bottom of the notch is 0.25 mm, and the remaining thickness of the notch is 8 mm.
3. The gloss was measured according to GB/T8807-1988, test method for specular gloss on plastics, using a BYK AG-4442 micro triangular gloss meter at a test angle of 60 °.
The test results are shown in table 1.
TABLE 1
From the test results in table 1, the modified polypropylene composite material of example 1 of the present invention has very excellent tensile strength, room temperature toughness, low temperature toughness and surface gloss, and meanwhile, due to the performance influence caused by the different components of comparative examples 1-6 and example 1, the present invention adopts a specific sulfur vulcanization composition to crosslink the ethylene propylene diene monomer rubber, and modifies the polypropylene by combining the mixture of low density polyethylene, linear low density polyethylene and metallocene modified polyethylene in a specific mass ratio, wherein the usage amount of the linear low density polyethylene and the metallocene modified polyethylene is slightly higher than that of the low density polyethylene, so that the compatibility of the system is further improved, the strength and toughness, especially the low temperature toughness, of the polypropylene material are greatly improved, and the surface gloss is synergistically improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be within the technical scope of the present invention.
Claims (2)
1. A polypropylene composite material with high glossiness and good low-temperature toughness is prepared from the following raw materials in parts by weight:
52-66 parts of polypropylene
5-10 parts of polyethylene
10-15 parts of toughening agent
1-5 parts of cross-linking agent
1-4 parts of maleic anhydride grafted polypropylene
15-25 parts of mineral filler
0.2 to 0.5 portion of antioxidant
0.1 to 0.3 portion of light stabilizer
0.1 to 0.3 portion of lubricant
The polypropylene is one or a mixture of homo-polypropylene and co-polypropylene, and the melt index of the polypropylene is 5-30g/10min at 230 ℃ and 2.16 Kg;
the polyethylene is a mixture of low-density polyethylene, linear low-density polyethylene and metallocene modified polyethylene, and the mass ratio of the low-density polyethylene to the metallocene modified polyethylene is 1: 1-3: 3-5;
the toughening agent is ethylene propylene diene monomer;
the cross-linking agent is a mixture of sulfur, tetramethyl thiuram disulfide and dibenzothiazyl disulfide, and the mass ratio of the sulfur to the tetramethyl thiuram disulfide to the dibenzothiazyl disulfide is 1-3: 3-5: 1;
the grafting rate of the maleic anhydride grafted polypropylene is 0.5-1.2%, and the melt index is 30-40g/10min under the conditions of 230 ℃ and 2.16 Kg;
the mineral filler is a mixture of talcum powder and calcium carbonate, the mass ratio of the talcum powder to the calcium carbonate is 1-3:1, and the particle size is 2500 meshes;
the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168, and the mass ratio of the antioxidant to the antioxidant is 1: 1;
the light stabilizer is a hindered amine light stabilizer 944;
the lubricant is calcium stearate.
2. The method for preparing the polypropylene composite material with high gloss and good low temperature toughness as claimed in claim 1, wherein the method comprises the following steps:
(1) weighing the raw materials according to the proportion, adding the raw materials into a high-speed mixer, wherein the mixing speed is 200-;
(2) the mixed raw materials are placed in a double-screw extruder for melting, extruding and granulating, wherein the double-screw extruder is divided into ten areas from a feeding section to a machine head, the temperature from the first area to the tenth area is 170-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557818.5A CN112608552A (en) | 2020-12-25 | 2020-12-25 | Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011557818.5A CN112608552A (en) | 2020-12-25 | 2020-12-25 | Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112608552A true CN112608552A (en) | 2021-04-06 |
Family
ID=75244942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011557818.5A Withdrawn CN112608552A (en) | 2020-12-25 | 2020-12-25 | Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112608552A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163721A (en) * | 2021-11-08 | 2022-03-11 | 金发科技股份有限公司 | Polypropylene calcium carbonate master batch and preparation method and application thereof |
| CN114456491A (en) * | 2022-01-29 | 2022-05-10 | 广东源诚塑业有限公司 | Low-temperature impact resistant polypropylene modified material and preparation method thereof |
| CN114773734A (en) * | 2022-03-30 | 2022-07-22 | 上海升广科技有限公司 | Cold-resistant high-toughness copolymerized polypropylene plastic and preparation method thereof |
-
2020
- 2020-12-25 CN CN202011557818.5A patent/CN112608552A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163721A (en) * | 2021-11-08 | 2022-03-11 | 金发科技股份有限公司 | Polypropylene calcium carbonate master batch and preparation method and application thereof |
| CN114163721B (en) * | 2021-11-08 | 2023-08-29 | 金发科技股份有限公司 | Polypropylene calcium carbonate master batch and preparation method and application thereof |
| CN114456491A (en) * | 2022-01-29 | 2022-05-10 | 广东源诚塑业有限公司 | Low-temperature impact resistant polypropylene modified material and preparation method thereof |
| CN114456491B (en) * | 2022-01-29 | 2023-08-01 | 广东源诚塑业有限公司 | Low-temperature impact resistant polypropylene modified material and preparation method thereof |
| CN114773734A (en) * | 2022-03-30 | 2022-07-22 | 上海升广科技有限公司 | Cold-resistant high-toughness copolymerized polypropylene plastic and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112608552A (en) | Polypropylene composite material with high glossiness and good low-temperature toughness and preparation method thereof | |
| CN103524878B (en) | A kind of modified polypropylene composite material and its production and use | |
| US3280220A (en) | Blend of high density polyethylene-1-butene copolymer | |
| FI98522C (en) | Thermoplastic alloys, their method of manufacture and their use in the manufacture of industrial products | |
| CN107722448B (en) | Composite composition for automotive interior material using natural fiber | |
| WO2009065589A1 (en) | Improved glass fiber reinforced polypropylene | |
| EP1833909A1 (en) | Novel propylene polymer compositions | |
| EP3186310A1 (en) | Modification of engineering plastics using olefin-maleic anhydride copolymers | |
| CN103044769A (en) | Polypropylene composite material with high strength and high elongation at break and preparation method thereof | |
| CN113354914B (en) | Polypropylene composite material capable of being blasted at low temperature and preparation method and application thereof | |
| ES2664343T3 (en) | Bamboo fiber reinforced polypropylene compositions | |
| CN112778684B (en) | Talcum powder filled polypropylene material with high yield strain and low-temperature impact resistance and preparation method thereof | |
| CN110903549B (en) | Polypropylene composite material and preparation method and application thereof | |
| CN107216545A (en) | A kind of dynamic crosslinking PP/PE intermingling materials for characteristic of turning white with low-density high-impact proof stress and preparation method thereof | |
| JP5297808B2 (en) | Masterbatch and manufacturing method thereof | |
| CN111138758A (en) | Long fiber reinforced polypropylene composite material capable of improving floating fiber and high surface finish degree and preparation method thereof | |
| CN112063056B (en) | Glass fiber reinforced polypropylene composite material with good appearance and preparation method thereof | |
| EP3467022B1 (en) | Propylene-based resin composition and injection-molded object thereof | |
| KR20130055167A (en) | High density polyethylene resin composition and molded article prepared therefrom | |
| CN111378225B (en) | Auxiliary agent system for producing high impact polypropylene, preparation method and application thereof | |
| CN111675898B (en) | Low-water-absorption toughened polyamide material and preparation method thereof | |
| CN108727688B (en) | Propylene resin composition and molded article | |
| WO2021197926A1 (en) | Recycled resin composition | |
| CN117567815B (en) | High-impact polypropylene resin composition, preparation method and application | |
| CN113897044B (en) | PC/EVA composition 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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210406 |