CN107759898B - High-shading-degree polypropylene composite material and preparation method thereof - Google Patents
High-shading-degree polypropylene composite material and preparation method thereof Download PDFInfo
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- CN107759898B CN107759898B CN201610682477.1A CN201610682477A CN107759898B CN 107759898 B CN107759898 B CN 107759898B CN 201610682477 A CN201610682477 A CN 201610682477A CN 107759898 B CN107759898 B CN 107759898B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- 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
- 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
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a high-opacity polypropylene composite material, which comprises polypropylene, a polyolefin elastomer, titanium dioxide, mica powder, an antioxidant, a nucleating agent and a lubricant, wherein the mesh number of the titanium dioxide is 350-500 meshes, the particle size of the mica powder is 400-500 meshes, and the mass ratio of the mica powder to the titanium dioxide is 0.5-2.0: 1. According to the invention, titanium dioxide and mica powder which are mixed according to a certain mass ratio are added into the polypropylene material, so that the light-shielding property of the polypropylene material is improved, the level of the commercially available light-shielding PC can be reached, the cost performance of a lamp light-shielding part is improved, and in addition, by adding the glass fiber, the mechanical property of the light-shielding polypropylene material is greatly improved on the premise of ensuring that the light-shielding property of the polypropylene is not influenced, the application of the polypropylene material in the LED lighting industry is expanded, and the material cost of the industry is reduced.
Description
Technical Field
The invention relates to a polypropylene composite material and a preparation method thereof, in particular to a high-shading-degree polypropylene composite material and a preparation method thereof, and belongs to the technical field of composite high polymer materials and processing thereof.
Background
Polypropylene (PP) is one of the most rapidly developed plastic varieties in the plastic industry, has the advantages of good mechanical properties, light specific gravity, no toxicity, easy processing, corrosion resistance and the like, has wide raw material sources and low price, and is widely applied to the fields of household appliances, automobiles, packaging and the like.
Polypropylene (PP) has been well developed in traditional applications, but has also found room in some areas not addressed. For example, shading PC is generally adopted as shading plates and shading ring components in the existing lighting lamp industry, but the cost performance of the shading PC is not ideal, so that on the shading components with low physical performance requirements, polypropylene can be specially modified to completely achieve the same shading effect as the shading PC, and the cost of polypropylene with high shading degree has great advantages compared with the shading PC.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a high-light-shading-degree polypropylene composite material with good cost performance and a preparation method thereof, which can meet the application of a polypropylene material in the aspect of light shading in the field of illumination.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the polypropylene composite material with high light shading degree comprises the following components in parts by weight:
the formula is preferably as follows:
wherein the polypropylene is at least one of homopolymerized polypropylene with a melt index of 0.5-100g/10min and copolymerized polypropylene with a melt index of 0.1-60g/10 min; the polyolefin elastomer is at least one of ethylene-octene copolymer, ethylene-butene copolymer and ethylene-propylene copolymer; the mesh number of the titanium dioxide is 350-500 meshes; the particle size of the mica powder is 400-500 meshes, and the mass ratio of the mica powder to the titanium dioxide is 0.5-2.0: 1.
The further technical scheme is as follows:
the titanium dioxide is surface-modified by a silane coupling agent; the mica powder is surface-modified by a silane coupling agent.
The glass fiber is preferably surface-modified by a silane coupling agent.
The antioxidant is at least one of phosphite antioxidant and hindered phenol antioxidant.
The nucleating agent is at least one of sorbitol, phosphate, carboxylate and amide nucleating agents.
The lubricant is at least one of stearic acid type, amide type and erucic acid amide type lubricant.
The invention also discloses a preparation method of the polypropylene composite material with high light shading degree, which comprises the following steps:
(1) uniformly mixing 50-90 parts of polypropylene, 2-10 parts of polyolefin elastomer, 5-35 parts of titanium dioxide, 5-35 parts of mica powder, 0.1-0.5 part of antioxidant, 0.05-0.3 part of nucleating agent and 0.1-0.5 part of lubricant in a high-speed mixer to obtain a premix;
(2) and adding the premix from a feeding port of a double-screw extruder, fully melting, uniformly mixing and granulating to obtain the high-opacity polypropylene composite material.
The further technical scheme is as follows:
and (3) after the premix is melted and uniformly mixed in a double-screw extruder, drawing 2-8 parts of glass fiber from a special die head, and then sequentially carrying out water cooling and granulation by a granulator to obtain the high-shading-degree polypropylene composite material.
The method also comprises the step of carrying out surface modification on the titanium dioxide, the mica powder and the glass fiber by adopting a silane coupling agent.
The beneficial technical effects of the invention are as follows: according to the invention, titanium dioxide and mica powder which are mixed according to a certain mass ratio are added into the polypropylene material, so that the light-shielding property of the polypropylene material is improved, the level of the commercially available light-shielding PC can be reached, the cost performance of a lamp light-shielding part is improved, and in addition, by adding the glass fiber, the mechanical property of the light-shielding polypropylene material is greatly improved on the premise of ensuring that the light-shielding property of the polypropylene is not influenced, the application of the polypropylene material in the LED lighting industry is expanded, and the material cost of the industry is reduced.
Detailed Description
The present invention will be described in detail below with reference to specific examples and comparative examples. The parameters of the respective component materials used in the following examples and comparative examples are shown below, but the present application is not limited to the parameters and the designations of the respective component materials described below.
Homo-polypropylene 1 (homo-PP 1): the Melt Flow Rate (MFR) was 30g/10min (230 ℃, 2.16kg) and the density was 0.9g/cm3。
Homo-polypropylene 2 (homo-PP 2): the Melt Flow Rate (MFR) was 15g/10min (230 ℃, 2.16kg) and the density was 0.9g/cm3。
Copolypropylene 1 (copolypropylene 1): the Melt Flow Rate (MFR) was 30g/10min (230 ℃, 2.16kg) and the density was 0.89g/cm3。
Copolypropylene 2 (copolypropylene 2): the Melt Flow Rate (MFR) was 15g/10min (230 ℃, 2.16kg), and the density was 0.89g/cm3。
Ethylene-octene copolymer (POE): the Melt Flow Rate (MFR) was 5g/10min (230 ℃, 2.16 kg).
Mica powder: the manufacturer is Shenwei nonmetallic materials Co, Suzhou, and the mesh number of the mica powder is 500 meshes.
Titanium dioxide: the Henan complex of the manufacturer, the cyclopentadienyl titanium company, the mesh number of the titanium dioxide is 450 meshes.
Glass fiber: boulder fiberglass.
Aryl phosphate salt nucleating agent: the model TMP-5, the manufacturer is Huaming Tai chemical materials Co., Ltd.
Antioxidant 1010: the manufacturer is Nanjing Hua Li Ming chemical Co.
Antioxidant 168: the manufacturer is Nanjing Hua Li Ming chemical Co.
Calcium stearate: the manufacturer is Huaming Tai chemical materials Co., Ltd.
Silane coupling agent: one of KH550, KH560 or KH570 is selected and is commercially available.
The raw materials of the components are selected according to the formula dosage in the table 1 to respectively prepare the high-opacity polypropylene composite material, and the preparation steps are as follows:
(1) uniformly mixing polypropylene, polyolefin elastomer, titanium dioxide, mica powder, antioxidant, nucleating agent and lubricant in a high-speed mixer to obtain a premix;
(2) and adding the premix from a feeding port of a double-screw extruder, fully melting, uniformly mixing and granulating to obtain the high-opacity polypropylene composite material.
Wherein, the titanium dioxide and the mica powder can be subjected to surface modification by silane coupling agents (such as KH550, KH560 and KH570) by adopting common technical means in the field in advance.
TABLE 1 EXAMPLES 1-4 the amounts (unit: kg) of the respective component formulations
The products obtained in the above-mentioned specific examples 1 to 4 were subjected to the relevant property tests in which the tensile test was conducted in accordance with GB/T1040, the heat distortion temperature was conducted in accordance with ASTM D648(0.45MPa), the notched impact was conducted in accordance with GB/T1843, the light transmittance was conducted in accordance with GB/T2410, and the reflectance was conducted in accordance with ISO 3906-1980 (E). The results of the tests are shown in Table 2 below. The performance test was also performed using a commonly available shading PC as a comparative example, and the test results are shown in table 2.
Table 2 results of performance testing of specific examples 1-4
It can be seen from the specific embodiments 1-4 that the light transmittance of the material filled with the mica powder is only 45% in the embodiment 3, while the light transmittance of the material filled with the mica powder is only 33% in the embodiment 4 with the titanium dioxide powder, because the covering power of the titanium dioxide powder is very good, the light transmittance is improved by 33% compared with that of the material filled with the mica powder in the embodiment 3, but the light transmittance is different from that of the light-shielding PC, but when the titanium dioxide powder and the mica powder are mixed and used according to a certain mass ratio, the light-shielding degree of the material is greatly improved to about 10%, and the.
The raw materials of the components are selected according to the formula dosage in the table 3 to respectively prepare the high-opacity polypropylene composite material, and the preparation steps are as follows:
(1) uniformly mixing polypropylene, polyolefin elastomer, titanium dioxide, mica powder, antioxidant, nucleating agent and lubricant in a high-speed mixer to obtain a premix;
(2) and (2) melting and uniformly mixing the premix obtained in the step (1) in a double-screw extruder, drawing the glass fiber from a special die head, and then sequentially carrying out water cooling and granulation by a granulator to obtain the high-shading-degree polypropylene composite material.
Wherein, the titanium dioxide, the mica powder and the glass fiber can be subjected to surface modification by silane coupling agents (such as KH550, KH560 and KH570) by adopting common technical means in the field in advance.
TABLE 3 EXAMPLES 5-8 the amounts (unit: kg) of the respective components
| Raw material | Example 1 | Example 2 | Example 3 | Example 4 |
| Homopolymeric PP1 | 44.4 | — | 44.4 | — |
| Homopolymeric PP2 | — | 44.4 | — | 44.4 |
| Copolymerized PP1 | 20 | — | 25 | — |
| Copolymerized PP2 | — | 20 | — | 20 |
| POE | 5 | — | 5 | — |
| Glass fiber | 5 | 5 | 5 | 5 |
| Mica powder | 20 | 20 | 10 | 10 |
| Titanium white powder | 10 | 10 | 20 | 20 |
| Antioxidant 1010 | 0.1 | 0.1 | 0.1 | 0.1 |
| Antioxidant 168 | 0.2 | 0.2 | 0.2 | 0.2 |
| TMP-5 | 0.1 | 0.1 | 0.1 | 0.1 |
| Calcium stearate | 0.2 | 0.2 | 0.2 | 0.2 |
The products obtained in the above-mentioned specific examples 5 to 8 were subjected to the relevant property tests, wherein the tensile test was conducted in accordance with GB/T1040, the heat distortion temperature was conducted in accordance with ASTM D648(0.45MPa), the notched impact was conducted in accordance with GB/T1843, the light transmittance was conducted in accordance with GB/T2410, and the reflectance was conducted in accordance with ISO 3906-1980 (E). The performance test was also performed using a commonly available shading PC as a comparative example, and the test results are shown in table 4. The performance test was also performed using a commonly available shading PC as a comparative example, and the test results are shown in table 4.
TABLE 4 results of Performance testing of specific examples 5-8
Referring to the specific examples 1-2, the light-shielding property of the material reached the level of light-shielding PC, but the mechanical properties were somewhat different from that of light-shielding PC. In specific examples 5 to 8, the glass fiber is added to further enhance the mechanical properties of the product, and the shrinkage rate of the light-shielding PP can be adjusted, and it can be seen from examples 5 to 8 that the mechanical properties of the light-shielding PP after the glass fiber is added are closer to PC, and the light-shielding degree and the reflectivity are not greatly reduced.
The foregoing is only a preferred embodiment of the present invention. It should be noted that several improvements and modifications can be made without departing from the principle of the present invention, and all are considered to be within the scope of the present invention.
Claims (3)
1. A high opacity polypropylene composite, characterized in that: the composition comprises the following components in parts by weight:
wherein the polypropylene is at least one of homopolymerized polypropylene with a melt index of 0.5-100g/10min and copolymerized polypropylene with a melt index of 0.1-60g/10min, and the determination conditions of the melt index are as follows: the temperature is 230 ℃, and the load weight is 2.16 kg; the polyolefin elastomer is at least one of ethylene-octene copolymer, ethylene-butene copolymer and ethylene-propylene copolymer; the mesh number of the titanium dioxide is 350-500 meshes; the mesh number of the mica powder is 400-500 meshes, and the mass ratio of the mica powder to the titanium dioxide is 0.5:1 or 2: 1;
the titanium dioxide is surface-modified by a silane coupling agent; the mica powder is surface-modified by a silane coupling agent;
the glass fiber is subjected to surface modification by adopting a silane coupling agent;
the silane coupling agent is KH550, 560 or 570, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, the nucleating agent is an aryl phosphate salt nucleating agent, and the lubricant is calcium stearate.
2. A method for preparing the polypropylene composite material with high opacity according to claim 1, wherein: the method comprises the following steps:
(1) uniformly mixing 50-90 parts of polypropylene, 2-10 parts of polyolefin elastomer, 5-35 parts of titanium dioxide, 5-35 parts of mica powder, 0.1-0.5 part of antioxidant, 0.05-0.3 part of nucleating agent and 0.1-0.5 part of lubricant in a high-speed mixer to obtain a premix;
(2) adding the premix from a feeding port of a double-screw extruder, fully melting, uniformly mixing and granulating to obtain the high-shading-degree polypropylene composite material;
and (3) after the premix is melted and uniformly mixed in a double-screw extruder, drawing 2-8 parts of glass fiber from a special die head, and then sequentially carrying out water cooling and granulation by a granulator to obtain the high-shading-degree polypropylene composite material.
3. The method for preparing a high opacity polypropylene composite material according to claim 2, wherein: the method also comprises the step of carrying out surface modification on the titanium dioxide, the mica powder and the glass fiber by adopting a silane coupling agent.
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| CN106633408A (en) * | 2016-12-30 | 2017-05-10 | 苏州欧普照明有限公司 | Reflector |
| CN109082006B (en) * | 2018-07-04 | 2021-02-26 | 苏州亿光源光电科技有限公司 | High-toughness light-reflecting composite material for leak-proof light guide plate and preparation method thereof |
| CN109535554A (en) * | 2018-11-22 | 2019-03-29 | 深圳市富恒新材料股份有限公司 | A kind of LED light shell special-purpose anti-flaming reinforced polypropylene material and preparation method thereof |
| CN109721836B (en) * | 2018-12-21 | 2021-05-11 | 金旸（厦门）新材料科技有限公司 | Flame-retardant shading low-shrinkage polypropylene composite material and preparation method thereof |
| CN113061303A (en) * | 2020-01-02 | 2021-07-02 | 合肥杰事杰新材料股份有限公司 | Glass fiber reinforced polypropylene material and preparation method thereof |
| CN113174106A (en) * | 2020-12-14 | 2021-07-27 | 浙江金华威达日化包装实业有限公司 | PP material with high shading rate and high toughness and preparation method thereof |
| CN114479281A (en) * | 2022-03-15 | 2022-05-13 | 广东国立科技股份有限公司 | Low-molding-shrinkage shading PP material and preparation method thereof |
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