CN108559176B - Anti-yellowing PP plastic and preparation method and application thereof - Google Patents
Anti-yellowing PP plastic and preparation method and application thereof Download PDFInfo
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- CN108559176B CN108559176B CN201810357397.8A CN201810357397A CN108559176B CN 108559176 B CN108559176 B CN 108559176B CN 201810357397 A CN201810357397 A CN 201810357397A CN 108559176 B CN108559176 B CN 108559176B
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- 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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Abstract
The invention discloses yellowing-resistant PP plastic and a preparation method and application thereof. The yellowing-resistant PP plastic comprises the following raw materials in parts by weight: 40-70 parts of PP plastic, 4-8 parts of benzoxazine, 10-15 parts of dipentamethylenethiuram tetrasulfide, 10-15 parts of hydrolyzed polymaleic anhydride, 4-10 parts of asbestos powder and 1-2 parts of diacetyl epoxy vegetable oil acid glyceride. The yellowing-resistant PP plastic disclosed by the invention has excellent yellowing resistance; and the scratch resistance is excellent, the mechanical property is excellent, and the coating can be used in the field of automotive upholstery.
Description
Technical Field
The invention relates to a PP plastic, in particular to a yellowing-resistant PP plastic and a preparation method and application thereof.
Background
PP plastic is also called Polypropylene (PP for short), and has high impact resistance, high mechanical property and high resistance to corrosion of various organic solvents and acid and alkali. Has wide application in industry, and is one of common polymer materials. The polypropylene has high crystallinity and regular structure, so that the polypropylene has excellent mechanical property, but still belongs to a low variety in plastic materials, and the tensile strength of the polypropylene can only reach the level of 30MPa or slightly higher. Although polypropylene has good electrical property and high-frequency insulation property and is not influenced by humidity, the polypropylene is easy to generate the phenomenon of yellowing under the long-time irradiation of sunlight and ultraviolet light or the action of heat, oxygen stress and the like, so that the application range of the PP plastic is limited. Therefore, the invention provides scratch-resistant PP plastic and a preparation method and application thereof.
Disclosure of Invention
The invention aims to provide yellowing-resistant PP plastic and a preparation method and application thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the anti-yellowing PP plastic comprises the following raw materials in parts by weight: 40-70 parts of PP plastic, 4-8 parts of benzoxazine, 10-15 parts of dipentamethylenethiuram tetrasulfide, 10-15 parts of hydrolyzed polymaleic anhydride, 4-10 parts of asbestos powder and 1-2 parts of diacetyl epoxy vegetable oil acid glyceride.
As a further scheme of the invention: the yellowing-resistant PP plastic comprises the following raw materials in parts by weight: 48-62 parts of PP plastic, 5-7 parts of benzoxazine, 12-14 parts of dipentamethylenethiuram tetrasulfide, 11-14 parts of hydrolyzed polymaleic anhydride, 5-8 parts of asbestos powder and 1.2-1.6 parts of diacetyl epoxy vegetable oil acid glyceride.
As a further scheme of the invention: the yellowing-resistant PP plastic comprises the following raw materials in parts by weight: 53 parts of PP plastic, 6 parts of benzoxazine, 13 parts of dipentamethylenethiuram tetrasulfide, 12 parts of hydrolyzed polymaleic anhydride, 7 parts of asbestos powder and 1.5 parts of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution which is 3-5 times of the mass of the mixture and has the mass part of 55-65%, and mixing and stirring the mixture at the temperature of 50-60 ℃ for reaction for 1-2 hours; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass 1-2 times of that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and mixing and stirring for 20-30min at the temperature of 98-105 ℃; (4) mixing PP plastic and benzoxazine with the obtained product, and stirring at 175-180 deg.C for 30-45 min; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
As a further scheme of the invention: mixing dipentamethylenethiuram tetrasulfide and diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution with the mass part of 62% and 4 times of the mass of the mixture, and mixing and stirring the mixture at 55 ℃ for reaction for 1.3 hours; and (5) distilling under reduced pressure to recover ethanol.
As a further scheme of the invention: and (2) mixing the asbestos powder and the hydrolyzed polymaleic anhydride, adding water with the mass 1.6 times that of the mixture, and uniformly stirring.
As a further scheme of the invention: and (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 24min at 100 ℃.
As a further scheme of the invention: and (4) mixing PP plastic and benzoxazine with the obtained product, and mixing and stirring at 178 ℃ for 35 min.
An application of yellowing-resistant PP plastic in the field of automotive upholsteries.
Compared with the prior art, the invention has the beneficial effects that:
the yellowing-resistant PP plastic is prepared by taking PP plastic, benzoxazine, dipentamethylenethiuram tetrasulfide, hydrolyzed polymaleic anhydride, asbestos powder and diacetyl epoxy vegetable oil glyceride as main raw materials, exerts a synergistic effect by compounding the raw materials and has excellent yellowing resistance; and the scratch resistance is excellent, the mechanical property is excellent, and the coating can be used in the field of automotive upholstery.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
The anti-yellowing PP plastic comprises the following raw materials in parts by weight: 40 parts of PP plastic, 4 parts of benzoxazine, 10 parts of dipentamethylenethiuram tetrasulfide, 10 parts of hydrolyzed polymaleic anhydride, 4 parts of asbestos powder and 1 part of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into 55% ethanol solution which is 3 times of the mass of the mixture, and mixing and stirring the mixture at 50 ℃ for reaction for 1 hour; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass of 1 time of that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 20min at 98 ℃; (4) mixing PP plastic and benzoxazine with the obtained product, and stirring at 175 deg.C for 30 min; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
Example 2
The anti-yellowing PP plastic comprises the following raw materials in parts by weight: 70 parts of PP plastic, 8 parts of benzoxazine, 15 parts of dipentamethylenethiuram tetrasulfide, 15 parts of hydrolyzed polymaleic anhydride, 10 parts of asbestos powder and 2 parts of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into 65% ethanol solution which is 5 times of the mass of the mixture, and mixing and stirring the mixture at the temperature of 60 ℃ for reaction for 2 hours; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass being 2 times that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 30min at 105 ℃; (4) mixing PP plastic and benzoxazine with the mixture obtained in the previous step, and stirring for 45min at 180 ℃; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
Example 3
The anti-yellowing PP plastic comprises the following raw materials in parts by weight: 53 parts of PP plastic, 6 parts of benzoxazine, 13 parts of dipentamethylenethiuram tetrasulfide, 12 parts of hydrolyzed polymaleic anhydride, 7 parts of asbestos powder and 1.5 parts of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution with the mass part of 62% which is 4 times of the mass of the mixture, and mixing and stirring the mixture at the temperature of 55 ℃ for reaction for 1.3 hours; and (5) distilling under reduced pressure to recover ethanol. (2) Mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass of 1.6 times of that of the mixture, and uniformly stirring. (3) And (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and mixing and stirring for 24min at 100 ℃. (4) Mixing PP plastic and benzoxazine with the obtained product, and stirring at 178 deg.C for 35 min. (5) And (4) placing the obtained product in an extruder for extrusion to obtain the product.
Example 4
The anti-yellowing PP plastic comprises the following raw materials in parts by weight: 48 parts of PP plastic, 5 parts of benzoxazine, 12 parts of dipentamethylenethiuram tetrasulfide, 11 parts of hydrolyzed polymaleic anhydride, 5 parts of asbestos powder and 1.2 parts of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution with the mass part of 58% and the mass of 3.5 times that of the mixture, and mixing and stirring the mixture at 53 ℃ for reaction for 1.4 hours; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass of 1.4 times of that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 22min at 102 ℃; (4) mixing PP plastic and benzoxazine with the obtained product, and stirring at 176 deg.C for 38 min; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
Example 5
The anti-yellowing PP plastic comprises the following raw materials in parts by weight: 62 parts of PP plastic, 7 parts of benzoxazine, 14 parts of dipentamethylenethiuram tetrasulfide, 14 parts of hydrolyzed polymaleic anhydride, 8 parts of asbestos powder and 1.6 parts of diacetyl epoxy vegetable oil acid glyceride.
A preparation method of yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution with the mass part of 60% which is 4.5 times of the mass of the mixture, and mixing and stirring the mixture at 58 ℃ to react for 1.8 hours; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass of 1.8 times of that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 29min at 104 ℃; (4) mixing PP plastic and benzoxazine with the product obtained in the previous step, and stirring for 42min at 179 ℃; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
Comparative example 1
The procedure was as in example 3 except that dipentamethylenethiuram tetrasulfide was not contained in the starting material.
Comparative example 2
The preparation process was the same as in example 3 except that the starting material contained no hydrolyzed polymaleic anhydride.
Comparative example 3
The procedure was as in example 3 except that the starting materials contained no dipentamethylenethiuram tetrasulfide and no hydrolyzed polymaleic anhydride.
Examples of the experiments
First, the plastics prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to a conventional performance test.
TABLE 1 general Performance test data
| Item | Tensile strength MPa | Impact strength J/m | Bending strength MPa | Flexural modulus MPa |
| Example 1 | 34.5 | 24.8 | 40.2 | 1528 |
| Example 2 | 37.6 | 25.1 | 42.3 | 1621 |
| Example 3 | 39.1 | 27.4 | 46.2 | 1682 |
| Example 4 | 36.4 | 23.8 | 41.0 | 1503 |
| Example 5 | 38.9 | 25.6 | 42.8 | 1622 |
| Comparative example 1 | 20.1 | 15.2 | 31.8 | 1136 |
| Comparative example 2 | 22.3 | 14.3 | 32.3 | 1220 |
| Comparative example 3 | 18.6 | 12.1 | 30.2 | 1005 |
Secondly, the plastics prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to scratch resistance tests.
The scratch resistance is measured by using a scratch tester to evaluate the degree of scratch. A mechanically driven scraper is used to scrape a line pattern on the surface of the plastic. Each blade scrapes only once in one direction. The colour deviation Δ E of the non-scratched surface compared to the original is then measured using a colorimeter. The test conditions were: temperature: 23 ± 5 ℃, holding power: 10N, scratching speed: 1000mm/min, diameter of the scraper: 1 mm.
TABLE 2 scratch resistance test data
| Item | Color difference after scratch △ E |
| Example 1 | 0.30 |
| Example 2 | 0.27 |
| Example 3 | 0.26 |
| Example 4 | 0.31 |
| Example 5 | 0.28 |
| Comparative example 1 | 0.70 |
| Comparative example 2 | 0.52 |
| Comparative example 3 | 0.77 |
Thirdly, the plastics prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to yellowing resistance test.
The yellowing resistance test is to test delta E of two plastic samples before and after thermo-oxidative aging by using a spectrocolorimeter, wherein the size of the sample is phi 50 x 6, and the thermo-oxidative aging condition is 280 ℃ x 2 h.
TABLE 3 yellowing resistance test data
| Item | Color difference after scratch △ E |
| Example 1 | 1.6 |
| Example 2 | 1.4 |
| Example 3 | 1.1 |
| Example 4 | 2.0 |
| Example 5 | 1.8 |
| Comparative example 1 | 3.2 |
| Comparative example 2 | 3.6 |
| Comparative example 3 | 4.2 |
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (2)
1. The yellowing-resistant PP plastic is characterized by comprising the following raw materials in parts by weight: 53 parts of PP plastic, 6 parts of benzoxazine, 13 parts of dipentamethylenethiuram tetrasulfide, 12 parts of hydrolyzed polymaleic anhydride, 7 parts of asbestos powder and 1.5 parts of diacetyl epoxy vegetable oil acid glyceride;
the preparation method of the yellowing-resistant PP plastic comprises the following steps: (1) mixing dipentamethylenethiuram tetrasulfide with diacetyl epoxy vegetable olein, adding the mixture into an ethanol solution with the mass part of 62% which is 4 times of the mass of the mixture, and mixing and stirring the mixture at the temperature of 55 ℃ for reaction for 1.3 hours; distilling under reduced pressure to recover ethanol; (2) mixing asbestos powder and hydrolyzed polymaleic anhydride, adding water with the mass of 1.6 times of that of the mixture, and uniformly stirring; (3) mixing the product obtained in the step (1) and the product obtained in the step (2), and stirring for 24min at 100 ℃; (4) mixing PP plastic and benzoxazine with the product obtained in the previous step, and stirring at 178 ℃ for 35 min; (5) and (4) placing the obtained product in an extruder for extrusion to obtain the product.
2. The application of the yellowing-resistant PP plastic as claimed in claim 1 in the field of automotive interior parts.
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| CN103694573A (en) * | 2013-12-11 | 2014-04-02 | 上海瀚氏模具成型有限公司 | Yellowing-resistant PP/HDPE (Polypropylene/High-Density Polyethylene) plastics for automobile interior trim parts and preparation method thereof |
| CN107325406A (en) * | 2017-08-09 | 2017-11-07 | 安徽杰奥电气有限公司 | A kind of packing material for improving cable combination property |
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| CN103694573A (en) * | 2013-12-11 | 2014-04-02 | 上海瀚氏模具成型有限公司 | Yellowing-resistant PP/HDPE (Polypropylene/High-Density Polyethylene) plastics for automobile interior trim parts and preparation method thereof |
| CN107325406A (en) * | 2017-08-09 | 2017-11-07 | 安徽杰奥电气有限公司 | A kind of packing material for improving cable combination property |
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Effective date of registration: 20200907 Address after: Jiading District Xuhang town Baofeng road 201809 Shanghai City No. 198 Applicant after: SHANGHAI XINPENG PLASTIC PRODUCTS Co.,Ltd. Address before: 215000, Jiangsu, Suzhou, Wuzhong District Jing Jing Swan swing Road, No. 2588, 17 Applicant before: SUZHOU RUISHUO ENVIRONMENT TECHNOLOGY Co.,Ltd. |
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