CN112625363B - Low-VOC low-gloss low-shrinkage modified polypropylene material for automotive interior and preparation method thereof - Google Patents
Low-VOC low-gloss low-shrinkage modified polypropylene material for automotive interior and preparation method thereof Download PDFInfo
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- 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
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
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Abstract
The invention relates to a low-VOC low-gloss low-shrinkage polypropylene material for automotive interior and a preparation method thereof, wherein the material comprises the following components in parts by weight: 40-80 parts of polypropylene resin, 10-20 parts of POE resin, 1-4 parts of flatting agent, 20-40 parts of talcum powder, 1-3.5 parts of adsorbent and 2 parts of other auxiliary agents. The gloss of the delustering agent is reduced by adding an inorganic delustering agent, the VOC in an inorganic magnesium silicate molecular sieve adsorption material is added in the formula, and the shrinkage of the material is quickly reduced by adding high-mesh talcum powder.
Description
Technical Field
The invention relates to a low-VOC low-gloss low-shrinkage polypropylene material for automotive interiors and a preparation method thereof, belonging to the technical field of automotive interiors.
Background
Automotive interior materials are generally classified into hard interior and slush molding interior. The hard interior decoration has the advantages of low cost, simple forming process, convenient recycling treatment and the like, gradually replaces slush molding interior decoration, and becomes the mainstream in the current automobile research and development design.
The modified polypropylene material is used as a main hard interior material and occupies the main position of the hard interior material.
The polypropylene resin has low density, good heat resistance, high strength, high hardness, high glossiness, good insulativity, high molding shrinkage and low cost, but has poor heat resistance, poor light aging resistance, high shrinkage, high glossiness and high VOC content.
In general, talc powder, elastomer, and additives are added to PP resin to improve the disadvantages of the modified polypropylene material, and thus the modified polypropylene material can be used in various aspects of life.
Since 2010, the automobile industry has developed rapidly, about 2800 thousands of automobiles are produced in China every year, the proportion of plastic products of automobile interior parts is more and more, the conventional plastic products contain partial Volatile Organic Compounds (VOC), so that people in the automobiles feel uncomfortable, and with the higher attention of people on the comfort level in the automobiles, the call for reducing the content of VOC in the automobiles is increased year by year.
In order to reduce visual fatigue of drivers, automobile interior parts almost have the requirement of matte to ensure driving safety. The traditional extinction technology of the plastic interior part realizes the matte and beautiful effects by carrying out secondary processing such as sand blasting on an injection mold or matte paint spraying on the part. The sand blasting needs to frequently maintain the mold, and once the maintenance is not good, the difference of the glossiness of the plastic part batches is large; the paint spraying causes environmental pollution and increases the VOC content in the vehicle.
The molding shrinkage of the polypropylene material is usually between 1.0% and 2.0%, when the interior material with higher requirement on precision is processed, the shrinkage in a larger range causes poor matching of parts of the material, the qualified product rate of products is very low, the molding shrinkage is effectively reduced while the original performance is maintained or improved, and the dimensional stability of the interior material for modified polypropylene can be ensured.
Disclosure of Invention
In order to solve the above problems, it is a first object of the present invention to provide a low VOC, low gloss and low shrinkage polypropylene material for automotive interior.
The polypropylene material for the automotive interior with low VOC, low gloss and low shrinkage comprises the following components in parts by weight:
preferably, the material comprises the following components in parts by weight:
the PP resin is used as matrix resin to provide basic composition of the material, the POE has narrow molecular weight distribution, lateral octyl groups in the molecular structure are longer than lateral ethyl groups, and a connecting point can be formed in the molecular structure, so that the components have the functions of connecting and buffering, the system has the functions of dispersing and buffering impact energy when impacted, the probability of crack development of silver streaks due to stress is reduced, and the impact strength of the system is improved. The addition of the talcum powder improves the crystallinity of the PP material to a certain extent, can effectively improve the heat resistance of the material and increase the dimensional stability of parts. The delustering agent is polyolefin grafted maleic anhydride, and can be fully crosslinked with a polypropylene material, so that the glossiness of the material is obviously reduced. The adsorbent reduces VOC of the material through a special microscopic cavity structure and small molecular substances in the adsorbent material.
It is preferable that: the PP resin is copolymerized polypropylene, the melt flow rate is 3-100g/10min, the test standard of the melt flow rate is ISO 1133-1-2011, the test condition is 230 ℃, and the melt flow rate is 2.16 kg.
It is preferable that: the POE resin is ethylene-butylene copolymer resin, the melt flow rate is 2-10g/10min, the test standard of the melt flow rate is ISO 1133-1-2011, the test condition is 190 ℃, and the melt flow rate is 2.16 kg.
It is preferable that: the particle size of the talcum powder is 500-5000 meshes, and the matting agent is wollastonite.
It is preferable that: the adsorbent is a molecular sieve, and the content of magnesium silicate in the molecular sieve is 60-90%.
It is preferable that: the matting agent is synthetic silica with the particle size of 300-3000 meshes and the silica content of 70-90 percent.
It is preferable that: the other auxiliary agents comprise one or more of a thermal oxygen stabilizer, an ultraviolet-resistant light stabilizer, a toner or a filler.
The second purpose of the invention is to provide a preparation method of the low-VOC low-gloss low-shrinkage polypropylene material for automotive interiors, the process is reasonable, the production process of the method is simple, and the produced polypropylene material is low in VOC content, low in gloss, low in shrinkage and good in dimensional stability.
The preparation method of the polypropylene material for the low-VOC low-gloss low-shrinkage automotive interior comprises the following steps:
(1) weighing PP resin, POE resin, talcum powder, a flatting agent, an adsorbent and other auxiliaries, and premixing for 3-4 minutes to obtain a premix;
(2) adding the premix into a double-screw extruder, and performing melt plasticizing extrusion granulation to obtain the low-VOC low-gloss low-shrinkage polypropylene material for automotive interiors.
It is preferable that: the premixing in the step (1) is carried out in a high-speed stirrer, and the mixture is stirred for 4 plus or minus 1min at the rotating speed of 1400 plus or minus 50r/min and is uniformly mixed.
It is preferable that: in the step (2), the extrusion temperature of the extrusion granulation is 200 +/-10 ℃, the rotating speed of a main machine of the extruder is 500 +/-10 r/min, and the feeding is 800 kg/h.
The third purpose of the invention is to provide the application of the low-VOC low-gloss low-shrinkage polypropylene material for the automotive interior parts.
In summary, the invention has the following advantages:
(1) according to the invention, the molecular sieve with magnesium silicate as a main component is added in the polypropylene modification process, so that volatile organic compounds in the material are removed, and the damage to a human body is reduced by reducing the concentration of the volatile organic compounds, so that a relatively comfortable in-car environment is also manufactured, and people in the car feel relaxed;
(2) the invention can reduce the gloss of the material, create a low-gloss environment, reduce the visual fatigue of a cab and achieve the aim of reducing the occurrence of accidents by adding the flatting agent into the modified polypropylene material.
(3) According to the invention, the talcum powder is added into the polypropylene formula, so that the shrinkage rate of the material is rapidly reduced, the size fluctuation of a workpiece is reduced, the assembly stability of the part during assembly is ensured, and the qualified rate of the part is improved.
The gloss of the delustering agent is reduced by adding an inorganic delustering agent, the VOC in an inorganic magnesium silicate molecular sieve adsorption material is added in the formula, and the shrinkage of the material is quickly reduced by adding high-mesh talcum powder.
Detailed Description
The present invention is further illustrated by the following specific embodiments, which are not intended to limit the scope of the invention.
The reagent sources related to the embodiment of the invention are as follows:
the polypropylene is PP EP548R, manufacturer: the melt flow rate of the Zhonghai shell brand is 28g/10min, the test standard of the melt flow rate is ISO 1133-1-2011, the test condition is 230 ℃, and the melt flow rate is 2.16 kg;
POE resin is POE ENGAGE7447, manufacturer DOW, melt flow rate of 4g/10min, test standard ISO 1133-1-2011 of melt flow rate, test condition 190 ℃, 2.16 kg;
talc powder GY950, manufacturer: guangyuan powder of Jiangyin city, with a particle size of 5000 meshes;
the matting agent was a200, manufacturer: guangxi Xingnanwanda, the content of silicon dioxide is 80 percent, and the particle size is 3000 meshes;
the adsorbent is MACROSORB MS10E, manufacturer: tianjin Guolong, the content of magnesium silicate is 73 percent;
the main antioxidant is SONOX1010, manufacturer: the three-rich chemical industry;
the auxiliary antioxidant is SONOX 168, manufacturer: the three-rich chemical industry;
the light stabilizer is T-81, manufacturer: beijing Tiangang;
the lubricant is EBS P400, manufacturer: guangzhou Runfeng;
carbon black is M717, manufacturer: casbots, usa;
examples 1 to 15
The index steps of each example are as follows:
putting PP resin, POE resin, talcum powder, flatting agent, adsorbent and other auxiliaries (including main antioxidant, auxiliary antioxidant, light stabilizer, lubricant and carbon black) into a high-speed stirrer, stirring for 4 +/-1 min at the rotating speed of 1400 +/-50 r/min, and uniformly mixing; and then adding the obtained premix into a co-rotating twin-screw extruder for melting, mixing, extruding and granulating to obtain the low-VOC low-gloss low-shrinkage polypropylene material for automotive interiors. Wherein the extrusion temperature is 200 plus or minus 10 ℃, the rotating speed of a main machine of the extruder is 500 plus or minus 10r/min, and the feeding is 800 kg/h.
The formulations of the components of examples 1 to 15 are shown in tables 1 to 3, and the performance indexes are shown in Table 5.
The formulations of the components of comparative examples 1 to 5 are shown in Table 4, the preparation methods are the same as in examples 1 to 15, and the performance indexes are shown in Table 4.
Table 1 ingredients ratios (in parts by mass) of examples 1-6
| Name of each component | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| PP resin | 64.5 | 62.5 | 60.5 | 54.5 | 52.5 | 50.5 |
| POE resin | 10 | 10 | 10 | 10 | 10 | 10 |
| Talcum powder | 20 | 20 | 20 | 30 | 30 | 30 |
| Matting agent | 1 | 2.5 | 4 | 1 | 2.5 | 4 |
| Adsorbent and process for producing the same | 1 | 2 | 3.5 | 1 | 2 | 3.5 |
| Primary antioxidant | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Auxiliary antioxidant | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Light stabilizers | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Lubricant agent | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Carbon black | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
Table 2 the proportions (in parts by mass) of the components in examples 7 to 12 were as follows
Table 3 the proportions (in parts by mass) of the components in examples 13 to 15 are set forth
| Name of each component | Example 13 | Example 14 | Example 15 |
| PP resin | 44.5 | 42.5 | 40.5 |
| POE resin | 20 | 20 | 20 |
| Talcum powder | 30 | 30 | 30 |
| Matting agent | 1 | 2.5 | 4 |
| Adsorbent and process for producing the same | 1 | 2 | 3.5 |
| Primary antioxidant | 0.4 | 0.4 | 0.4 |
| Auxiliary antioxidant | 0.4 | 0.4 | 0.4 |
| Light stabilizers | 0.2 | 0.2 | 0.2 |
| Lubricant agent | 0.2 | 0.2 | 0.2 |
| Carbon black | 0.8 | 0.8 | 0.8 |
TABLE 4 proportion of the ingredients in comparative examples 1 to 6 (in parts by mass)
The low-shrinkage polypropylene composition thus obtained was used to prepare a test specimen using a K-TEC85 type injection molding machine manufactured by MILACRON, Germany. The performance of the material was tested according to the corresponding national standard test method, wherein:
(1) the tensile strength is tested according to GB/T1040-2006, a 1A type sample is adopted, and the tensile speed is 50 mm/min;
(2) testing the notch impact strength of the cantilever beam according to GB/T1043-2008;
(3) the bending strength and the bending modulus are tested according to GB/T9341-2008;
(4) the molding shrinkage is tested according to GB/T17037.4-2003, which means that the dimension difference between a dried sample and a mold cavity for molding the sample is measured at the laboratory temperature within 16-24 h after the sample is molded, the sample is a small square sheet of 60 multiplied by 2mm, the length l 1 and the width b 1 of the test sample and the length l 0 and the width b 0 of the mold cavity are measured, the molding shrinkage S Mp parallel to the melt flow direction is measured in the middle of the sample width; the molding shrinkage S Mn, measured in the middle of the specimen length, perpendicular to the melt flow direction is calculated by the formula: s Mp ═ 100(l 0-l 1) l 0/and S Mn ═ 100(b 0-b 1)/b 0.
(5) Gloss was measured according to ISO 2813 standard.
(6) VOC was analyzed by a flask method using a high performance liquid chromatograph according to FLTM BZ157-01 as a reference.
Table 5 results of performance test of examples
Table 6 results of performance testing of examples
Table 7 results of performance testing of examples
Table 8 comparative example performance test results
Note: ND is not detected
As can be seen from tables 5-8 and table 4, compared with the comparative example, the automobile interior material prepared by the method of the present invention has the advantages that the simultaneous addition of the talcum powder and the flatting agent changes the surface structure of the material, and the glossiness of the material can be significantly reduced; the shrinkage rate of the material is reduced by increasing the content of the talcum powder and influencing the crystallinity of the polypropylene; and the addition of the adsorbent can adsorb harmful substances through the special pore structure of the molecular sieve, thereby obviously reducing the VOC content of the material. Therefore, the obtained modified polypropylene material has excellent performance, meets the part requirements of VOC, glossiness and shrinkage of most host factories, and is mainly applied to automotive interior materials.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The polypropylene material for the automotive interior with low VOC, low gloss and low shrinkage is characterized in that: the material comprises the following components in parts by weight:
40-80 parts of PP resin
10-20 parts of POE resin
20-40 parts of talcum powder
1-4 parts of flatting agent
1-3.5 parts of adsorbent
2 parts of other auxiliary agents;
the particle size of the talcum powder is 500-5000 meshes; the flatting agent is wollastonite; the adsorbent is a molecular sieve, and the content of magnesium silicate in the molecular sieve is 60-90%.
2. The low-VOC, low-gloss and low-shrinkage polypropylene material for automotive interiors according to claim 1, wherein: the PP resin is copolymerized polypropylene, the melt flow rate is 3-100g/10min, the test standard of the melt flow rate is ISO 1133-1-2011, the test condition is 230 ℃, and the melt flow rate is 2.16 kg.
3. The low-VOC, low-gloss and low-shrinkage polypropylene material for automotive interiors according to claim 1, wherein: the POE resin is ethylene-butylene copolymer resin, the melt flow rate is 2-10g/10min, the test standard of the melt flow rate is ISO 1133-1-2011, the test condition is 190 ℃ and 2.16 kg.
4. The low-VOC, low-gloss and low-shrinkage polypropylene material for automotive interiors according to claim 1, wherein: the other auxiliary agents comprise one or more of a thermal oxygen stabilizer, an ultraviolet-resistant light stabilizer, a toner or a filler.
5. The method for preparing the polypropylene material for low VOC low gloss low shrinkage automotive interior according to claim 1, comprising the steps of:
(1) weighing PP resin, POE resin, talcum powder, a delustering agent, an adsorbent and other auxiliaries according to the formula content, and premixing for 3-4 minutes to obtain a premix;
(2) adding the premix into a double-screw extruder, and performing melt plasticizing extrusion granulation to obtain the low-VOC low-gloss low-shrinkage polypropylene material for automotive interiors.
6. The method of claim 5, wherein: and (2) carrying out premixing in the step (1) in a high-speed stirrer, stirring for 4 +/-1 min at the rotating speed of 1400 +/-50 r/min, and uniformly mixing.
7. The method of claim 5, wherein: in the step (2), the extrusion temperature of the extrusion granulation is 200 +/-10 ℃, the rotating speed of a main machine of the extruder is 500 +/-10 r/min, and the feeding is 800 kg/h.
8. Use of the low VOC, low gloss and low shrinkage polypropylene material for automotive interiors as claimed in any of claims 1 to 4 in automotive interior parts.
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| CN116041848B (en) * | 2022-12-28 | 2023-12-05 | 金发科技股份有限公司 | Low-post-shrinkage modified polypropylene composite material and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173075A (en) * | 2007-12-04 | 2008-05-07 | 上海金发科技发展有限公司 | Low-luster polypropylene composite material and method for producing the same |
| CN102286177A (en) * | 2011-08-17 | 2011-12-21 | 金发科技股份有限公司 | Polypropylene composition with low luster and excellent scratch resistance and preparation method thereof |
| CN103254498A (en) * | 2013-03-06 | 2013-08-21 | 苏州旭光聚合物有限公司 | Low-gloss polypropylene composition material |
| CN103665540A (en) * | 2013-11-04 | 2014-03-26 | 惠州新大都合成材料科技有限公司 | Delustering polypropylene composite material and preparation method thereof |
| CN105602179A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof |
| CN107513211A (en) * | 2017-09-13 | 2017-12-26 | 北京航天试验技术研究所 | It is a kind of it is low distribute, low smell automobile using polypropylene composite material |
| CN109735008A (en) * | 2018-12-29 | 2019-05-10 | 上海普利特复合材料股份有限公司 | A kind of low smell, low gloss are thinning Polypropylene composite material for automobile and preparation method thereof |
| CN110437562A (en) * | 2019-08-20 | 2019-11-12 | 安徽滁州德威新材料有限公司 | A kind of environmental protection Textilene table mat PVC material and preparation method thereof |
| CN111286122A (en) * | 2019-11-29 | 2020-06-16 | 东风汽车有限公司 | Polypropylene modified material |
-
2020
- 2020-12-17 CN CN202011495056.0A patent/CN112625363B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173075A (en) * | 2007-12-04 | 2008-05-07 | 上海金发科技发展有限公司 | Low-luster polypropylene composite material and method for producing the same |
| CN102286177A (en) * | 2011-08-17 | 2011-12-21 | 金发科技股份有限公司 | Polypropylene composition with low luster and excellent scratch resistance and preparation method thereof |
| CN103254498A (en) * | 2013-03-06 | 2013-08-21 | 苏州旭光聚合物有限公司 | Low-gloss polypropylene composition material |
| CN103665540A (en) * | 2013-11-04 | 2014-03-26 | 惠州新大都合成材料科技有限公司 | Delustering polypropylene composite material and preparation method thereof |
| CN105602179A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof |
| CN107513211A (en) * | 2017-09-13 | 2017-12-26 | 北京航天试验技术研究所 | It is a kind of it is low distribute, low smell automobile using polypropylene composite material |
| CN109735008A (en) * | 2018-12-29 | 2019-05-10 | 上海普利特复合材料股份有限公司 | A kind of low smell, low gloss are thinning Polypropylene composite material for automobile and preparation method thereof |
| CN110437562A (en) * | 2019-08-20 | 2019-11-12 | 安徽滁州德威新材料有限公司 | A kind of environmental protection Textilene table mat PVC material and preparation method thereof |
| CN111286122A (en) * | 2019-11-29 | 2020-06-16 | 东风汽车有限公司 | Polypropylene modified material |
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