CN112063057A - Yellowing-resistant polypropylene composition for automobile expansion pot body and preparation method thereof - Google Patents
Yellowing-resistant polypropylene composition for automobile expansion pot body and preparation method thereof Download PDFInfo
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- CN112063057A CN112063057A CN202010926128.6A CN202010926128A CN112063057A CN 112063057 A CN112063057 A CN 112063057A CN 202010926128 A CN202010926128 A CN 202010926128A CN 112063057 A CN112063057 A CN 112063057A
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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
- C08L23/14—Copolymers of propene
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
Abstract
The invention relates to a yellowing-resistant polypropylene composition for an automobile expansion pot body and a preparation method thereof. The polypropylene composition is specially used for an automobile expansion kettle body, the produced part has high appearance transparency and excellent low-temperature impact resistance and high-temperature pressure resistance, the appearance is not changed greatly after the part is placed in an aging box at the high temperature of 150 ℃, no obvious yellowing phenomenon exists, the running state of the automobile expansion kettle is simulated in the environment of 120 ℃ after refrigerating fluid is added, the transparency and the color of the kettle body can be kept at good levels after 500 hours, and the polypropylene composition has good market application prospect.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a yellowing-resistant polypropylene composition for an automobile expansion pot body and a preparation method thereof.
Background
When the water temperature of the automobile cooling system rises, the cooling liquid expands, the water level rises, the expansion kettle has the effect that the cooling liquid which cannot be contained in the radiator flows back into the kettle body, the water tank pressure is prevented from being overhigh, the expansion kettle body is generally mainly used for storing the cooling liquid which expands due to the rise of the temperature, and the scales on the expansion kettle body can be used for checking the water level state of the cooling water. The upper body and the lower body of the expansion pot are made of PP/PE materials, the thickness of the upper body and the lower body is 3.5mm, and the upper body and the lower body are welded together through a hot plate after the process injection molding.
The expansion pot is positioned near the engine, the working temperature is generally between 80 and 100 ℃, and the pressure in the pot body is 145KPa, so that the pot body is required to have good heat aging resistance and high temperature and high pressure resistance. The cooling liquid contained in the kettle body is divided into three types: the antifreezing solution comprises ethylene glycol (showing green), propylene glycol (showing red with orange points) and diethylene glycol (showing blue), and different colors are caused by dyes in the antifreezing solution and have no relation with main components of the antifreezing solution.
In recent years, with the benefit of luck, transparent expansion kettles adopted by major engine plants such as Guangdong steam and the like gradually turn yellow in the driving process of automobiles, the attractiveness of the kettle body is reduced, and the transparency of the kettle body is reduced, so that the position of a hydraulic line is difficult to clearly observe, and therefore the requirement for improving the yellowing of the kettle body is brought forward by each major engine plant.
Patent CN 1090554184a teaches that a yellowing-resistant polypropylene material prepared from modified polypropylene, blue light acrylic resin powder and nano silver modified polypropylene has a good high-temperature yellowing resistance effect, but the preparation method is complex, and the cost of the related polypropylene composition is high; patent CN 109971076a discloses a method for improving yellowing of polypropylene by adding special branched polyethylene and by special microstructure design, but the patent is mainly directed to the improvement of chemical resistance, and does not significantly improve yellowing, especially the expansion pot body of an automobile added with refrigerating fluid is not described.
Disclosure of Invention
The invention aims to solve the technical problem of providing a yellowing-resistant polypropylene composition for an automobile expansion pot body and a preparation method thereof.
The invention provides a yellowing-resistant polypropylene composition for an automobile expansion kettle body, which comprises the following components in parts by weight:
wherein the content of the first and second substances,
the density of the random copolymerized polypropylene is in the range of 0.890-0.910g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg;
the density range of the homopolymerized polypropylene resin is 0.890-0.910g/cm3The melt mass flow rate is 0.5-2g/10min at 230 ℃ under a load of 2.16 Kg.
The main antioxidant is an antioxidant 3114.
The auxiliary antioxidant is at least one of antioxidant 627A and antioxidant PEP-36.
The invention also provides a preparation method of the yellowing-resistant polypropylene composition for the automobile expansion pot body, which comprises the following steps:
according to the proportion, the raw materials are put into a high-speed stirrer and are uniformly mixed; and then adding the mixture into a double-screw extruder, carrying out melt mixing, and carrying out extrusion granulation to obtain the yellowing-resistant polypropylene composition for the automobile expansion pot body.
The technological parameters of the double-screw extruder are as follows: the melt-kneading temperature is 180-220 ℃, and the screw rotation speed is 450-500 rpm.
The invention also provides an application of the yellowing-resistant polypropylene composition for the automobile expansion pot body.
Advantageous effects
The polypropylene composition is specially used for an automobile expansion kettle body, the produced part has high appearance transparency and excellent low-temperature impact resistance and high-temperature pressure resistance, after the part is placed in an aging box at the high temperature of 150 ℃, no obvious yellowing phenomenon exists, after refrigerating fluid is added, the running state of the automobile expansion kettle is simulated in the environment of 120 ℃, after 500 hours, the transparency and the color of the kettle body can be kept at good levels, and the polypropylene composition has good market application prospect.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The raw materials used in the examples and comparative experiments are, but not limited to, the following:
random copolymerized polypropylene resin:
PP SM198 from Malaysia with a density of 0.895g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg.
PP 4220 from Yanshan petrochemical having a density of 0.898g/cm3Melt mass flow at 230 ℃ under a load of 2.16KgThe dynamic rate is 0.2-2g/10 min.
PP R4220 from Yanshan petrochemical with density of 0.901g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg.
Homo-polypropylene resin:
PP B1101 from Taiwan chemical fiber, density 0.902g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg.
PPH2801 from Yanshan petrochemical at a density of 0.899g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg.
Antioxidant 1010: purchased from basf;
antioxidant 3114: purchased from basf;
antioxidant 168: purchased from basf;
antioxidant 627A: purchased from kepi;
antioxidant PEP-36: purchased from adi;
nucleating agent TMB-5: purchased from Shanxi institute of chemical engineering.
Each performance evaluation method:
(1) and (3) testing mechanical properties: the comparative examples and examples were directly injection molded into mechanical specimens, and after the injection molding of the ISO mechanical specimens, the specimens were tested for tensile strength, flexural modulus and notched impact strength after conditioning in a standard environment (23 ℃, 50% relative humidity).
Tensile strength is performed according to ISO 527 standard, flexural modulus is performed according to ISO 178 standard, and notched impact strength is performed according to ISO 180 standard.
(2) The comparative examples and examples were injection moulded into expansion pot bodies and tested in two ways: firstly, directly placing an expansion pot into a drying oven at 150 ℃ for 500 hours; secondly, pouring the LEC-II-35 type special refrigerating fluid for wide steam into the expansion pot body, sealing the cover, and placing the expansion pot body into an aging box at 120 ℃ for 200 hours. The above-mentioned aged and untreated expanded pots were compared separately for the following tests:
1) and (3) testing the yellowing index: the samples were tested for X, Y, Z tristimulus values using an X-rite/CE7000A spectrometerObtaining the yellowing index Yi according to the method of GB 2409-1980, wherein the difference value of the yellowing index Yi of the kettle body after the test and the yellowing index Yi of the kettle body before the test is delta1The difference value of the yellowing indexes of the kettle body after the test and the kettle body before the test is delta Yi2；
2) And (3) testing light transmittance: the PG2000-Pro-EX test wavelength of Shanghai reusable instrument is 580nm, and the light transmittance data T before and after aging is obtained according to the methodB1And TA1Transmittance data T before and after aging according to method 2B2And TA2。
TABLE 1 yellowing-resistant Polypropylene in expanded kettle examples and comparative examples (parts by weight)
Table 2: performance test results of the polypropylene compositions of examples and comparative examples
The host factory has two detection conditions aiming at yellowing of the expansion pot body of the automobile: 1) and (3) conventional aging: directly placing the kettle body into an aging oven for aging at the temperature of 150 ℃ for 500h, and observing the degree of surface yellowing; 2) aging after adding refrigerating fluid: the refrigerating fluid specified by the host factory (LEC-II-35 brand refrigerating fluid is adopted in the embodiment) is poured into the kettle body, the required amount is added, then the cover is covered, the opening is sealed, and the kettle is placed into a high-temperature box at 120 ℃ and aged for 200 hours. The yellowing is caused by the fact that the raw materials of the kettle body contain the antioxidant 1010, and the antioxidant 1010 can generate a 3, 5-di-tert-butyl-4-hydroxybenzaldehyde byproduct in the plastic aging process, which is a light yellow or light brown substance and causes the kettle body to yellow. In addition, in the second case, when the pot is in a high temperature state, the stearic acid in the coolant enters the pot under a high temperature and high pressure state, resulting in yellowing. Therefore, the invention adopts the specific random copolymerization polypropylene resin and changes different antioxidant systems to achieve the effect of improving yellowing.
The comparative example 1 shows the yellowing result of the conventional copolymerized polypropylene, and it can be seen that the addition of the conventional copolymerized polypropylene improves the yellowing index, and the improvement effect on yellowing is the worst.
As can be seen from comparative examples 2-4, the PP SM198 in the random copolymer polypropylene resin has the most obvious improvement on yellowing, and the change of the yellowing index under the conventional aging condition is only 19, which is obviously better than that of the other two schemes. However, the solution was already pulverized at 500h in the course of conventional aging, so that further improvement was required.
Comparative examples 5 and 6 conventional antioxidants 1010 and 168 were added based on comparative example 3, and the results show that although the kettle body was no longer pulverized after the two antioxidants were added, the yellowing indexes for conventional aging were 31 and 25, respectively, and the results of comparative example 2 were not substantially improved, and the light transmittance was not significantly improved, because the yellow substance generated by the antioxidant 1010 affects the yellowing effect of the kettle body.
Based on the above, examples 1-3 further improved the antioxidant system of the composition. Comparison of example 1 and comparative example 6 shows that the yellowing index of example 1 is only 10, which is significantly better than that of comparative example 6, and the transparency is not significantly reduced under conventional aging.
As for the main antioxidant, the antioxidant 3114 has a strong reducing property and is less likely to generate a small molecular chain segment, and therefore, has a good effect of improving yellowing.
As for the secondary antioxidants, the antioxidants 627A and PEP-36 each further have two phosphorus atoms and have a higher efficiency in reducing the peroxide, so that the peroxide generated by terminating the peroxide radical by the primary antioxidant can be consumed more rapidly without generating by-products.
Example 4 with the addition of the nucleating agent TMB-5, the results show that the addition of the nucleating agent TMB-5 improves the yellowing effect of the parts and improves the transparency.
The polypropylene composition is specially applied to an automobile expansion kettle body, can obviously improve the appearance trouble caused by yellowing, and has no obvious influence on the mechanical property of the material.
Claims (7)
1. A yellowing-resistant polypropylene composition for an automobile expansion pot body is characterized in that: the coating comprises the following components in parts by weight:
wherein the content of the first and second substances,
the density of the random copolymerization polypropylene is 0.890-0.910g/cm3The melt mass flow rate is 0.2-2g/10min at 230 ℃ under a load of 2.16 Kg;
the density range of the homopolymerized polypropylene resin is 0.890-0.910g/cm3The melt mass flow rate is 0.5-2g/10min at 230 ℃ under a load of 2.16 Kg.
2. The composition of claim 1, wherein: the main antioxidant is an antioxidant 3114.
3. The composition of claim 1, wherein: the auxiliary antioxidant is at least one of antioxidant 627A and antioxidant PEP-36.
4. The composition of claim 1, wherein: the nucleating agent is a nucleating agent TMB-5.
5. A method for preparing the yellowing-resistant polypropylene composition for expansion pots of automobiles as claimed in claim 1, comprising:
according to the proportion, the raw materials are put into a high-speed stirrer and are uniformly mixed; and then adding the mixture into a double-screw extruder, carrying out melt mixing, and carrying out extrusion granulation to obtain the yellowing-resistant polypropylene composition for the automobile expansion pot body.
6. The method of claim 5, wherein: the technological parameters of the double-screw extruder are as follows: the melt-kneading temperature is 180-220 ℃, and the screw rotation speed is 450-500 rpm.
7. Use of the yellowing-resistant polypropylene composition for automobile expansion pots as claimed in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010926128.6A CN112063057B (en) | 2020-09-07 | 2020-09-07 | Yellowing-resistant polypropylene composition for automobile expansion pot body and preparation method thereof |
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| CN202010926128.6A CN112063057B (en) | 2020-09-07 | 2020-09-07 | Yellowing-resistant polypropylene composition for automobile expansion pot body and preparation method thereof |
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| CN112063057B CN112063057B (en) | 2023-03-14 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030068483A1 (en) * | 2001-03-30 | 2003-04-10 | Yoshinori Takahashi | Polypropylene base porous film and production process for the same |
| JP2007145909A (en) * | 2005-11-24 | 2007-06-14 | Matsushita Electric Works Ltd | Polypropylene resin composition for light-transmitting molded product and light-transmitting molded product |
| CN102532689A (en) * | 2010-12-27 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Boiling-resistant yellowing polypropylene composite material and preparing method thereof |
| CN102558678A (en) * | 2011-12-26 | 2012-07-11 | 上海普利特复合材料股份有限公司 | High-transparency high-modulus and impact-resistant modified polypropylene material and preparation method thereof |
| CN103709518A (en) * | 2012-09-29 | 2014-04-09 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene pellet |
| CN103740028A (en) * | 2013-12-28 | 2014-04-23 | 重庆普利特新材料有限公司 | Creep-resistant and thermal-oxidative-aging-resistant polypropylene composition and preparation method thereof |
| CN104327369A (en) * | 2013-07-22 | 2015-02-04 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene pellet |
| CN108192220A (en) * | 2017-12-27 | 2018-06-22 | 重庆普利特新材料有限公司 | It is a kind of for polypropylene material of expansion tank and preparation method thereof |
| CN109988364A (en) * | 2019-04-29 | 2019-07-09 | 上海金发科技发展有限公司 | A kind of easy spray coating polypropylene composition and preparation method thereof |
| CN110016182A (en) * | 2019-03-21 | 2019-07-16 | 江苏金发科技新材料有限公司 | Ageing-resistant anti-precipitation long glass fiber-reinforced polypropylene materials and preparation method thereof |
-
2020
- 2020-09-07 CN CN202010926128.6A patent/CN112063057B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030068483A1 (en) * | 2001-03-30 | 2003-04-10 | Yoshinori Takahashi | Polypropylene base porous film and production process for the same |
| JP2007145909A (en) * | 2005-11-24 | 2007-06-14 | Matsushita Electric Works Ltd | Polypropylene resin composition for light-transmitting molded product and light-transmitting molded product |
| CN102532689A (en) * | 2010-12-27 | 2012-07-04 | 合肥杰事杰新材料股份有限公司 | Boiling-resistant yellowing polypropylene composite material and preparing method thereof |
| CN102558678A (en) * | 2011-12-26 | 2012-07-11 | 上海普利特复合材料股份有限公司 | High-transparency high-modulus and impact-resistant modified polypropylene material and preparation method thereof |
| CN103709518A (en) * | 2012-09-29 | 2014-04-09 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene pellet |
| CN104327369A (en) * | 2013-07-22 | 2015-02-04 | 中国石油化工股份有限公司 | Polypropylene composition and polypropylene pellet |
| CN103740028A (en) * | 2013-12-28 | 2014-04-23 | 重庆普利特新材料有限公司 | Creep-resistant and thermal-oxidative-aging-resistant polypropylene composition and preparation method thereof |
| CN108192220A (en) * | 2017-12-27 | 2018-06-22 | 重庆普利特新材料有限公司 | It is a kind of for polypropylene material of expansion tank and preparation method thereof |
| CN110016182A (en) * | 2019-03-21 | 2019-07-16 | 江苏金发科技新材料有限公司 | Ageing-resistant anti-precipitation long glass fiber-reinforced polypropylene materials and preparation method thereof |
| CN109988364A (en) * | 2019-04-29 | 2019-07-09 | 上海金发科技发展有限公司 | A kind of easy spray coating polypropylene composition and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 宋程鹏等: "聚丙烯1102K粉料用助剂配方的研究", 《石化技术》 * |
| 宋程鹏等: "聚丙烯1102K粉料用助剂配方的研究", 《石化技术》, 10 April 2014 (2014-04-10), pages 5 - 8 * |
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