CN113861554B - High-gloss and well-dispersed polypropylene talcum powder master batch and preparation method and application thereof - Google Patents
High-gloss and well-dispersed polypropylene talcum powder master batch and preparation method and application thereof Download PDFInfo
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- C08J2423/10—Homopolymers or copolymers of propene
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Abstract
The invention discloses a high-gloss and well-dispersed polypropylene talcum powder master batch, a preparation method and application thereof, and relates to the technical field of high polymer materials. The polypropylene talcum powder master batch comprises the following components in parts by weight: 5-20 parts of homo-polymerization low-melting polypropylene powder; 2-10 parts of metallocene low isotacticity polypropylene; 80-95 parts of talcum powder; 0.1 to 2 portions of other additives. The metallocene low isotacticity polypropylene is added in the high-gloss and well-dispersed polypropylene talcum powder master batch, the fluidity difference between the metallocene low isotacticity polypropylene and other phases is very large, and the metallocene low isotacticity polypropylene and other phases are easy to be firstly injected on the surface of a mould to form a solidification layer to form a high gloss surface, so that higher glossiness is achieved. Meanwhile, the metallocene low isotacticity polypropylene can be effectively dispersed and combined with talcum powder under the condition of existence of homopolymerized low melt index polypropylene powder, so that a good dispersing effect is achieved, and the polypropylene talcum powder master batch also has good low temperature resistance.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-gloss well-dispersed polypropylene talcum powder master batch, a preparation method and application thereof.
Background
The research on polypropylene talcum powder master batch mainly aims at the content of talcum powder, the type of carrier and the processing technology, and does not relate to the research on high-gloss polypropylene talcum powder master batch. The dispersibility of the polypropylene talc master batch affects the appearance of the product in the back-end process, so that the dispersibility needs to be improved, and meanwhile, the polypropylene talc master batch is required to have good glossiness when applied to the specific electric appliance field, so that the improvement of the glossiness of the polypropylene talc master batch is very important.
CN107129634a discloses a preparation method of high-filling talcum powder master batch added with macromolecular dispersing agent, which comprises the following steps: raw materials are prepared, and the raw materials are prepared according to the following weight percentages: 10% -25% of matrix resin; 2% -10% of macromolecular dispersing agent; 1% -5% of an auxiliary agent; 70-85% of talcum powder; premixing raw materials, namely uniformly premixing matrix resin, a macromolecular dispersing agent and an auxiliary agent in a mixer; preparing talcum powder master batch, namely adding talcum powder and the premixed raw materials into an internal mixer for banburying, so that the talcum powder and matrix resin are fully mixed; extruding and granulating by a single screw or double screw extruder after banburying is completed; the extruded particles are screened by a vibrating screen, cooled, and then cooled by air conveying equipment to obtain the high-filling talcum powder master batch. The high-filling talcum powder master batch prepared by the method disclosed by the technology improves the dispersion performance of the talcum powder master batch, but the talcum powder content can only be improved to 70-85%, the good dispersion effect is not achieved, the extrusion temperature of a single screw extruder or a double screw extruder is 180-230 ℃, the temperature is higher, the color of the obtained talcum powder master batch is dark, the production of natural or white products at the downstream is not facilitated, and the improvement of the surface glossiness of the talcum powder master batch is also not facilitated.
Disclosure of Invention
The invention aims to overcome the defects and defects of poor dispersibility and glossiness of the existing polypropylene talcum powder master batch and provide the high-glossiness and good-dispersion polypropylene talcum powder master batch.
The invention aims to provide a preparation method of a high-gloss and good-dispersion polypropylene talcum powder master batch.
The invention also aims to provide an application of the high-gloss and good-dispersion polypropylene talcum powder master batch in the preparation of electric appliances and electronic appliances.
The above object of the present invention is achieved by the following technical scheme:
the high-gloss and good-dispersion polypropylene talcum powder master batch comprises the following components in parts by weight:
5-20 parts of homo-polymerization low-melting polypropylene powder;
2-10 parts of metallocene low isotacticity polypropylene;
80-95 parts of talcum powder;
0.1 to 2 parts of other additives,
the homo-polymerization low-melting-point polypropylene powder is homo-polymerization polypropylene with the melt flow rate of 0.5-5 g/10min measured according to the ISO1133-2011 method under the condition of 230 ℃/2.16 kg;
the metallocene low isotacticity polypropylene is metallocene polypropylene with isotacticity of 55-65%, and the melt flow rate is 500-3000 g/10min measured according to the ISO1133-2011 method under 230 ℃/2.16kg condition.
The polypropylene talcum powder master batch is added with a small amount of metallocene low isotacticity polypropylene, so that when the talcum powder master batch is injection molded, the difference of melt flow rates of the metallocene low isotacticity polypropylene phase and other phases in a melt is very large, and the metallocene low isotacticity polypropylene phase and the melt flow rates of other phases are easy to be firstly injection molded on the surface of a mold to form a solidification layer to form a high gloss surface, so that higher glossiness is achieved.
Meanwhile, the low isotacticity polypropylene added with metallocene in the polypropylene talcum powder master batch disclosed by the invention has better low temperature resistance, and can be widely applied to the fields of household appliances and electronic appliances.
The addition of the metallocene low isotacticity polypropylene in the polypropylene talcum powder master batch is very critical, the realization of high glossiness and good dispersion effect cannot be achieved if the addition of the metallocene low isotacticity polypropylene is too low, the low temperature impact performance of the polypropylene talcum powder master batch cannot be affected if the addition of the metallocene low isotacticity polypropylene is too high, and the polypropylene talcum powder master batch has good low temperature resistance.
Preferably, the composition comprises the following components in parts by weight:
8-15 parts of homo-polymerization low-melting polypropylene powder;
5-8 parts of metallocene low isotacticity polypropylene;
88-92 parts of talcum powder;
0.5 to 2 portions of other additives.
Preferably, the homo-polypropylene low-melt-index polypropylene powder is homo-polypropylene with a melt flow rate of 3-4 g/10min measured according to ISO1133-2011 under 230 ℃/2.16 kg.
Preferably, the metallocene low isotacticity polypropylene is metallocene polypropylene with isotacticity of 60-63%, and the melt flow rate is 2000-2500 g/10min measured under the condition of 230 ℃/2.16kg according to the ISO1133-2011 method.
Preferably, the talc has a particle size of 8 to 20. Mu.m. The particle size of talcum powder has a certain influence on the overall dispersibility, talcum powder with the particle size of less than 10 mu m is too fine and easy to agglomerate, the dispersibility is influenced, and the too large particle size is also unfavorable for the overall uniform dispersion, finally the dispersibility and glossiness of the polypropylene talcum powder master batch are influenced, and the notch impact strength of the low-temperature cantilever beam is also reduced.
Further preferably, the talc has a particle size of 10 to 15. Mu.m.
Preferably, the other additives include 0.2 to 1 part of an antioxidant and 0.3 to 1 part of a lubricant.
The following description is needed:
the antioxidant may be a mixture of hindered phenol primary antioxidants and phosphite or thioether secondary antioxidants.
Other additives include other processing aids, such as one or more of metal soaps, stearic acid complex esters, amides, and mixtures thereof.
The invention also specifically protects a preparation method of the high-gloss and good-dispersion polypropylene talcum powder master batch, which comprises the following steps:
s1, adding homo-polymerization low-melting-index polypropylene powder, metallocene low-isotacticity polypropylene, talcum powder and other additives into an internal mixer, and uniformly mixing to obtain a mixture;
s2, simultaneously adding the mixture into a double-screw extruder in a main feeding and double-side feeding mode, extruding and granulating to obtain the polypropylene talcum powder master batch.
The following are to be described:
the extrusion granulating temperature of the invention is 150-170 ℃,
the current granulator has limited powder feeding capacity of about 80-100 kg/h, and can cause raw material overflow only by banburying, and the scheme adopts banburying and side feeding to extrude and granulate the mixture, so that the powder returning problem is fundamentally solved, and the problem of environmental pollution caused by the powder is solved.
Further preferably, the mass percentage of the main feeding is 55-70%, and the mass percentage of the double-side feeding is 30-45%.
The application of the high-gloss and well-dispersed polypropylene talcum powder master batch in the preparation of household appliances and electronic appliances is also within the protection scope of the invention.
The polypropylene talcum powder master batch disclosed by the invention has high surface glossiness, good dispersibility with talcum powder and low temperature resistance, and can be widely applied to the fields of household appliances and electronic appliances.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a high-gloss and well-dispersed polypropylene talcum powder master batch, wherein metallocene low-isotacticity polypropylene is added in the master batch, the difference of the fluidity of the metallocene low-isotacticity polypropylene and other phases is very large, the metallocene low-isotacticity polypropylene is easy to be firstly injected on the surface of a mould to form a solidification layer to form a high gloss surface, higher glossiness is achieved, and meanwhile, the low-temperature notch impact performance of the polypropylene talcum powder master batch can be effectively improved through the synergistic effect of components such as homo-polymerization low-melt polypropylene powder and metallocene low-isotacticity polypropylene.
The glossiness of the polypropylene talcum powder master batch can reach 62.1, the 1-level dispersing effect can be realized, the polypropylene talcum powder master batch has good dispersing and high glossiness, and the notch impact strength of the polypropylene talcum powder master batch at the temperature of minus 40 ℃ can reach 3.45kJ/m at the highest 2 Has good low-temperature toughness.
Detailed Description
The invention will be further described with reference to the following specific embodiments, but the examples are not intended to limit the invention in any way. Raw materials reagents used in the examples of the present invention are conventionally purchased raw materials reagents unless otherwise specified.
Wherein the examples and comparative examples of the present invention have gloss, dispersion coefficient and notched impact strength at-40℃of kJ/m 2 The test method of (2) is as follows:
dispersion coefficient: the polypropylene talcum powder master batch is prepared into 100mm x 1mm square plates by polishing the surface of the polypropylene talcum powder master batch, the surface of the polypropylene talcum powder master batch is observed by a secondary phase analyzer, the number of black spots appearing on the 2mm x 2mm area is quantified by the secondary phase analyzer, the polypropylene talcum powder master batch is divided into 10 grades according to the difference of the number of the black spots on the surface, wherein the grade 1 is the best, the grade 10 is the worst, the number of the grade 1 black spots is within 2, the grade 2-10, the number of the black spots is within 4, the number of the black spots is within 6, the number of the black spots is within 8, the number of the black spots is within 10, the number of the black spots is within 12, the number of the black spots is within 14, the number of the black spots is within 16, the number of the black spots is within 18 and the black spots is larger than 18.
Gloss level: according to standard GB/T8807-1988, the degree to which the surface of an object is close to specular is expressed numerically. The gloss level may be evaluated using a gloss meter, which typically uses 20 °, 45 °, 60 ° or 85 ° illumination, mainly 60 ° illumination, depending on the angle of illumination and observation of the light source. The testing method comprises the following steps: the gloss data were read directly from a flat panel of 2.0mm x 100mm using a gloss meter.
Izod notched impact strength at-40 ℃ and kJ/m 2 : according to standard GB/T1843-2008, polypropylene talcum powder master batch is injection molded into an 80mm x 10mm x 4mm cantilever beam notch impact spline, and then the spline is placed into a forced convection oven at the temperature of minus 40 ℃ to test the low-temperature cantilever beam notch impact strength.
The raw material information of the invention is specifically described as follows:
melt flow rate of the melt-finger polypropylene powder in the homopolymerization is 15g/10min according to ISO1133-2011 under 230 ℃/2.16kg condition, and the melt-finger polypropylene powder is purchased from Baling petrochemical industry and has the brand of PP 150 (powder);
the melt flow rate of the homo-polymerization low-melt-index polypropylene powder A is 3g/10min according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the melt flow rate is purchased from Zhonghai Shell and is named as PP HP550J;
the melt flow rate of the homo-polymerization low-melting-point polypropylene powder B is 4g/10min according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the melt flow rate is purchased from Shenhuaining coal and has the brand of PP 1102K;
the melt flow rate of the homo-polymerized low-melt-index polypropylene powder C is 0.6g/10min according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the melt flow rate is purchased from Taiwan petrochemical industry in China and is named as PP B1101;
the melt flow rate of the homo-polymerization low-melt-index polypropylene powder D is 5g/10min according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the melt flow rate is purchased from rapsull and has the brand name of PP 050;
the metallocene low isotacticity polypropylene A is metallocene polypropylene with isotacticity of 60%, and has a melt flow rate of 2000g/10min measured according to ISO1133-2011 under 230 ℃/2.16kg, and is purchased from Japan and sold under the trade mark L-MODU S400;
the metallocene low isotacticity polypropylene B is a metallocene polypropylene with the isotacticity of 63%, and has the melt flow rate of 2500g/10min measured according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and is purchased from Japan and has the brand L-MODU S600;
the metallocene low isotacticity polypropylene C is metallocene polypropylene with the isotacticity of 55 percent, the melt flow rate is 800g/10min measured according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the metallocene low isotacticity polypropylene C is purchased from Japan and has the brand of PP T500;
the metallocene low isotacticity polypropylene D is metallocene polypropylene with 65% isotacticity, and has a melt flow rate of 3000g/10min measured according to ISO1133-2011 under 230 ℃/2.16kg, and is purchased from Japan and sold under the trade mark L-MODU S901;
the metallocene low isotacticity polypropylene E is metallocene polypropylene with the isotacticity of 68%, the melt flow rate is 10g/10min according to the ISO1133-2011 method under the condition of 230 ℃/2.16kg, and the metallocene low isotacticity polypropylene E is purchased from the Yanshan petrochemical industry and is named as PP C5608M;
the metallocene low isotacticity polypropylene F is metallocene polypropylene with 50% isotacticity, and has a melt flow rate of 1400g/10min measured according to ISO1133-2011 under 230 ℃/2.16kg, and is purchased from Japan under the trade mark of L-MODU S410;
talc A is purchased from Huamei Talc, with the trade name AH-1250N6 and the particle diameter D50 of 10-15 μm;
talcum powder B is purchased from Longguan talcum with the brand of TY90-20-A and the particle size D50 of 16-20 mu m;
the antioxidant is antioxidant Y-001, and is purchased from the barracks;
the lubricant was lubricant-EBS HI-LUBE, available from Han Guoxin Yuan.
Examples 1 to 12
A high-gloss and good-dispersion polypropylene talcum powder master batch comprises the following components in parts by weight in table 1.
The preparation method of the high-gloss and good-dispersion polypropylene talcum powder master batch specifically comprises the following steps:
s1, adding homo-polymerization low-melting-index polypropylene powder, metallocene low-isotacticity polypropylene, talcum powder and other additives into an internal mixer for banburying for 20min, and uniformly mixing to obtain a mixture;
s2, feeding the mixture with the mass percentage of 60% into a double-screw extruder by a forced feeder, feeding the mixture with the mass percentage of 40% into the double-screw extruder by a double-side feeding mode, extruding and granulating together to obtain the polypropylene talcum powder master batch.
TABLE 1
Comparative example 1
The polypropylene talcum powder master batch comprises the following components in parts by weight:
6 parts of metallocene low isotacticity polypropylene A; 90 parts of talcum powder A, 0.2 part of antioxidant and 0.3 part of lubricant.
The preparation method of the polypropylene talcum powder master batch specifically comprises the following steps:
s1, adding metallocene low isotacticity polypropylene, talcum powder and other additives into a low-speed mixer for banburying for 20min, and uniformly mixing to obtain a mixture;
s2, feeding the mixture with the mass percentage of 60% into a double-screw extruder by a forced feeder, feeding the mixture with the mass percentage of 40% into the double-screw extruder by a double-side feeding mode, extruding and granulating together to obtain the polypropylene talcum powder master batch.
Comparative example 2
The polypropylene talcum powder master batch comprises the following components in parts by weight:
10 parts of homo-polymerization low-melting polypropylene powder A; 90 parts of talcum powder A, 0.2 part of antioxidant and 0.3 part of lubricant.
The preparation method of the polypropylene talcum powder master batch specifically comprises the following steps:
s1, adding homo-polymerization low-melting-point polypropylene powder, talcum powder and other additives into a low-speed mixer for banburying for 20min, and uniformly mixing to obtain a mixture;
s2, feeding the mixture with the mass percentage of 60% into a double-screw extruder by a forced feeder, feeding the mixture with the mass percentage of 40% into the double-screw extruder by a double-side feeding mode, extruding and granulating together to obtain the polypropylene talcum powder master batch.
Comparative example 3
The polypropylene talcum powder master batch comprises the following components in parts by weight:
10 parts of melt-finger polypropylene powder in homopolymerization, 6 parts of metallocene low isotacticity polypropylene A, 90 parts of talcum powder A, 0.2 part of antioxidant and 0.3 part of lubricant.
The preparation method of the polypropylene talcum powder master batch specifically comprises the following steps:
s1, adding homo-polymerization ultra-high melt index polypropylene, metallocene low isotacticity polypropylene, talcum powder and other additives into a low-speed mixer for banburying for 20min, and uniformly mixing to obtain a mixture;
s2, feeding the mixture with the mass percentage of 60% into a double-screw extruder by a forced feeder, feeding the mixture with the mass percentage of 40% into the double-screw extruder by a double-side feeding mode, extruding and granulating together to obtain the polypropylene talcum powder master batch.
Comparative examples 4 to 9
The polypropylene talcum powder master batch comprises the following components in parts by weight in table 2.
The preparation method of the high-gloss and good-dispersion polypropylene talcum powder master batch specifically comprises the following steps:
s1, adding homo-polymerization low-melting-index polypropylene powder, metallocene low-isotacticity polypropylene, talcum powder and other additives into a low-speed mixer for banburying for 20min, and uniformly mixing to obtain a mixture;
s2, feeding the mixture with the mass percentage of 60% into a double-screw extruder by a forced feeder, feeding the mixture with the mass percentage of 40% into the double-screw extruder by a double-side feeding mode, extruding and granulating together to obtain the polypropylene talcum powder master batch.
TABLE 2
| Comparative example 4 | Comparative example 5 | Comparative example 6 | Comparative example 7 | Comparative example 8 | Comparative example 9 | |
| Homopolymerization low melt index polypropylene powder A | 4 | 22 | 20 | 5 | 10 | 10 |
| Metallocene low isotacticity polypropylene A | 11 | 1 | 10 | 2 | ||
| Metallocene low isotacticity Polypropylene E | 6 | |||||
| Metallocene low isotacticity polypropylene F | 6 | |||||
| Talc powder A | 90 | 90 | 78 | 96 | 90 | 90 |
| Antioxidant | 0.2 | 0.2 | 1 | 0.05 | 0.2 | 0.2 |
| Lubricant | 0.3 | 0.3 | 1 | 0.05 | 0.3 | 0.3 |
Result detection
The results of the above examples and comparative examples are shown in Table 3.
TABLE 3 Table 3
As can be seen from the data in Table 3, the polypropylene talcum powder master batch of the invention can achieve higher glossiness after injection molding, the glossiness value of the embodiment can reach 62.1 at most, and the synergy of the components of the polypropylene talcum powder master batch of the invention is quite obvious as can be seen from the comparison of the embodiment 1 and the comparative example 3 and the comparison of the embodiment 1 and the comparative examples 8 and 9, and the glossiness, the dispersion coefficient and the low-temperature toughness of the final master batch material can be obviously reduced by the notch impact strength of the cantilever beam at-40 ℃ without being in the protection scope of the invention. The comparison of example 1 and comparative examples 4-7 shows the importance of the compatibility of the components of the polypropylene talc master batch of the present invention, and the specific technical effects of the present invention cannot be achieved by changing the compatibility, and the polypropylene talc master batch with high gloss and good dispersibility cannot be obtained. The low temperature toughness of the present invention is not achieved.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. The high-gloss and good-dispersion polypropylene talcum powder master batch is characterized by comprising the following components in parts by weight:
8-15 parts of homo-polymerization low-melting polypropylene powder;
5-6 parts of metallocene low isotacticity polypropylene;
88-92 parts of talcum powder;
0.5 to 2 portions of other additives;
the homo-polymerization low-melting-point polypropylene powder is homo-polymerization polypropylene with the melt flow rate of 0.5-5 g/10min measured according to the ISO1133-2011 method under the condition of 230 ℃/2.16 kg;
the metallocene low isotacticity polypropylene is metallocene polypropylene with isotacticity of 55-65%, and the melt flow rate is 500-3000 g/10min measured according to the ISO1133-2011 method under 230 ℃/2.16 kg;
the particle diameter D50 of the talcum powder is 10-15 mu m.
2. The high-gloss, well-dispersed polypropylene talc master batch according to claim 1, wherein the homo-polymerized low-melt polypropylene powder is homo-polymerized polypropylene having a melt flow rate of 3-4 g/10min measured according to ISO1133-2011 at 230 ℃/2.16 kg.
3. The high gloss, well-dispersed polypropylene talc master batch according to claim 1, wherein the metallocene low isotacticity polypropylene is a metallocene polypropylene having an isotacticity of 60-63%, and a melt flow rate of 2000-2500 g/10min measured according to ISO1133-2011 at 230 ℃/2.16 kg.
4. A high gloss, well dispersed polypropylene talc masterbatch according to claim 1 wherein said other additives include 0.2 to 1 part antioxidant and 0.3 to 1 part lubricant.
5. A method for preparing the high-gloss and well-dispersed polypropylene talcum powder master batch according to any one of claims 1 to 4, which is characterized by comprising the following steps:
s1, adding homo-polymerization low-melting-index polypropylene powder, metallocene low-isotacticity polypropylene, talcum powder and other additives into an internal mixer, and uniformly mixing to obtain a mixture;
s2, simultaneously adding the mixture into a double-screw extruder in a main feeding and double-side feeding mode, extruding and granulating to obtain the polypropylene talcum powder master batch.
6. The method for preparing the high-gloss and good-dispersion polypropylene talcum powder master batch according to claim 5, wherein the mass percentage of the main feeding is 55-70%, and the mass percentage of the double-side feeding is 30-45%.
7. Use of the high gloss, well dispersed polypropylene talc master batch of any one of claims 1 to 4 in the preparation of household appliances and electronic appliances.
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| PCT/CN2022/117654 WO2023036207A1 (en) | 2021-09-07 | 2022-09-07 | High-gloss and good-dispersion polypropylene talcum powder masterbatch, and preparation method therefor and use thereof |
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