High-gloss black master batch for non-polar plastic and preparation method of high-gloss black master batch

Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses a high-gloss black master batch for non-polar plastics and a preparation method of the high-gloss black master batch. The high-gloss black master batch for the non-polar plastic comprises the following components in parts by weight: 50-70 parts of carbon black; 30 to 50 parts of non-polar carrier resin; 3-8 parts of a dispersant; and 1-3 parts of an antioxidant. The invention provides the high-gloss black master batch with brand new composition for the non-polar plastic, and the research shows that the high-gloss black master batch for the non-polar plastic has higher glossiness when being applied to the non-polar plastic; the important application value is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a high-gloss black masterbatch for non-polar plastics and a preparation method thereof. Background Art

[0002] A black masterbatch is a high-concentration colorant composed of pigments (mainly carbon black), carrier resins, dispersants, etc. In the modern plastic processing industry, black masterbatches are widely used in non-polar resin materials such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC) due to their good coloring properties, ultraviolet shielding effect, and excellent physical and chemical stability. Especially in the fields of automotive parts, household appliance shells, packaging materials, pipe systems, etc., the requirements for the surface gloss, color depth, and weather resistance of plastic products are increasing day by day, which has promoted the research and development and application of high-gloss black masterbatches.

[0003] However, traditional black masterbatch products generally have problems such as low gloss, poor dispersibility, and serious pigment migration. Especially when used in non-polar plastic substrates, due to the poor compatibility between pigments such as carbon black and resins, the surface of the final product is rough and the color is uneven, affecting its appearance quality and market competitiveness. Therefore, developing a high-gloss black masterbatch suitable for non-polar plastics has important practical significance and broad market prospects. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a high-gloss black masterbatch for non-polar plastics and a preparation method thereof.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention first provides a high-gloss black masterbatch for non-polar plastics, which comprises the following components in parts by weight: 50-70 parts of carbon black; 30-50 parts of non-polar carrier resin; 3-8 parts of dispersant; 1-3 parts of antioxidant.

[0007] The present invention provides a high-gloss black masterbatch for non-polar plastics with a completely new composition. Research shows that the high-gloss black masterbatch for non-polar plastics described in the present invention has a relatively high gloss when applied to non-polar plastics.

[0008] Preferably, the high-gloss black masterbatch for non-polar plastics comprises the following components in parts by weight: 50-60 parts of carbon black; 30-40 parts of non-polar carrier resin; 3-6 parts of dispersant; 1-2 parts of antioxidant.

[0009] Most preferably, the high-gloss black masterbatch for non-polar plastics is characterized in that it comprises the following components in parts by weight: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0010] Preferably, the non-polar carrier resin is polyethylene, polypropylene or polyvinyl chloride.

[0011] Preferably, the antioxidant is antioxidant 1010 or antioxidant 168.

[0012] Preferably, the dispersant is selected from zinc stearate or ethylene bisstearamide.

[0013] Preferably, the dispersant is selected from polyolefin-pyrene phosphate-polyester.

[0014] Preferably, the polyolefin-pyrene phosphate-polyester is prepared by the following method:

[0015] (1) Take isobutene monomer and solvent and add them into a reaction kettle, then add a catalyst, and react at 0-5°C for 2-4 h under nitrogen protection; after the reaction, take the reaction product to obtain polyolefin;

[0016] (2) Take polyolefin, 1-pyrenemethanol and solvent and add them into a reaction kettle, then add phosphorus pentoxide, and react at 80-100°C for 6-8 hours; after the reaction, take the reaction product to obtain a polyolefin-pyrene phosphate intermediate;

[0017] (3) Add the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid into a reaction kettle, then add a catalyst, and carry out polycondensation reaction at 160-180°C for 4-6 h under nitrogen protection; after the reaction, take the reaction product to obtain polyolefin-pyrene phosphate-polyester.

[0018] The inventors have shown in the research that the selection of the dispersant is very crucial; in the high-gloss black masterbatch for non-polar plastics described in the present invention, adding the polyolefin-pyrene phosphate-polyester dispersant prepared by the above method can significantly improve the glossiness of the high-gloss black masterbatch for non-polar plastics described in the present invention when applied to non-polar plastics compared with adding a conventional dispersant.

[0019] Preferably, in step (1), the volume ratio of isobutene monomer to solvent is 1:2-4.

[0020] Most preferably, in step (1), the volume ratio of isobutene monomer to solvent is 1:3.

[0021] Preferably, the solvent in step (1) is n-hexane.

[0022] Preferably, the dosage of the catalyst in step (1) is 0.1-1% of the weight of the isobutene monomer.

[0023] Most preferably, the dosage of the catalyst in step (1) is 0.5% of the weight of the isobutene monomer.

[0024] Most preferably, the catalyst described in step (1) is boron trifluoride.

[0025] Preferably, the weight ratio of the polyolefin, 1-pyrenemethanol and phosphorus pentoxide in step (2) is 100:8-12:5-10.

[0026] Most preferably, the weight ratio of the polyolefin, 1-pyrenemethanol and phosphorus pentoxide in step (2) is 100:10:8.

[0027] Preferably, the weight ratio of the total weight of the polyolefin and 1-pyrenemethanol to the amount of the solvent used in step (2) is 1 kg:3-5 L.

[0028] Most preferably, the weight ratio of the total weight of the polyolefin and 1-pyrenemethanol to the amount of the solvent used in step (2) is 1 kg:4 L.

[0029] Preferably, the weight ratio of the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid in step (3) is 100:1-2:4-6.

[0030] Most preferably, the weight ratio of the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid in step (3) is 100:1.5:5.

[0031] Preferably, the amount of the catalyst used in step (3) is 0.1-0.5% of the weight of the polyolefin-pyrene phosphate intermediate.

[0032] Most preferably, the amount of the catalyst used in step (3) is 0.3% of the weight of the polyolefin-pyrene phosphate intermediate.

[0033] Preferably, the catalyst described in step (3) is tetrabutyl titanate.

[0034] Preferably, the dispersant consists of zinc stearate and polyolefin-pyrene phosphate-polyester.

[0035] Preferably, the weight ratio of zinc stearate to polyolefin-pyrene phosphate-polyester is 1:2-4.

[0036] Most preferably, the weight ratio of zinc stearate to polyolefin-pyrene phosphate-polyester is 1:3.

[0037] In further research, the inventor has shown that in the present invention, a high-gloss black masterbatch for non-polar plastics prepared by adding a dispersant composed of zinc stearate and polyolefin-pyrene phosphate-polyester has a significantly higher gloss when applied to non-polar plastics than a high-gloss black masterbatch for non-polar plastics prepared by adding a single zinc stearate or a single polyolefin-pyrene phosphate-polyester as a dispersant. Adding a dispersant composed of zinc stearate and polyolefin-pyrene phosphate-polyester to prepare a high-gloss black masterbatch for non-polar plastics can synergistically improve its gloss when applied to non-polar plastics.

[0038] The present invention also provides a method for preparing the above-mentioned high-gloss black masterbatch for non-polar plastics, which comprises the following steps: mixing carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt-extruding through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0039] Beneficial effects: The present invention provides a high-gloss black masterbatch for non-polar plastics with a brand-new composition. Research shows that the high-gloss black masterbatch for non-polar plastics of the present invention has a high gloss when applied to non-polar plastics; it has important application value. Specific embodiments

[0040] The following specific examples are used to further explain the present invention, but the examples do not limit the present invention in any form.

[0041] In the following examples, the high-density polyethylene used is the high-density polyethylene with the brand name DMDB-8916 from Sinopec; the remaining raw materials without specified sources are conventional raw materials that can be obtained by those skilled in the art through regular purchase channels.

[0042] Example 1 Preparation of a high-gloss black masterbatch for non-polar plastics

[0043] Components in parts by weight of raw materials: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0044] The non-polar carrier resin is high-density polyethylene; the antioxidant is antioxidant 1010; the dispersant is zinc stearate.

[0045] Preparation method: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt-extrude through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0046] Example 2 Preparation of a high-gloss black masterbatch for non-polar plastics

[0047] Components in parts by weight of raw materials: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0048] The non-polar carrier resin described is high-density polyethylene; the antioxidant is antioxidant 1010; the dispersant is ethylene bisstearamide.

[0049] Preparation method: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt and extrude through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0050] Example 3 Preparation of High-Gloss Black Masterbatch for Non-Polar Plastics

[0051] Components in parts by weight of raw materials: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0052] The non-polar carrier resin described is high-density polyethylene; the antioxidant is antioxidant 1010;

[0053] The dispersant is polyolefin-pyrene phosphate-polyester;

[0054] The polyolefin-pyrene phosphate-polyester is prepared by the following method:

[0055] (1) Take isobutene monomer and solvent and add them into a reaction kettle, then add a catalyst, and react at 3°C for 3 h under nitrogen protection; after the reaction is completed, take the reaction product to obtain polyolefin; among them, the volume ratio of isobutene monomer to solvent is 1:3; the solvent is n-hexane; the dosage of the catalyst is 0.5% of the weight of isobutene monomer; the catalyst is boron trifluoride;

[0056] (2) Take polyolefin, 1-pyrenemethanol and solvent and add them into a reaction kettle, then add phosphorus pentoxide, and react at 90°C for 7 hours; after the reaction is completed, take the reaction product to obtain a polyolefin-pyrene phosphate intermediate; among them, the weight ratio of polyolefin, 1-pyrenemethanol and phosphorus pentoxide is 100:10:8; the total weight ratio of polyolefin and 1-pyrenemethanol to the dosage of solvent is 1 kg:4 L;

[0057] (3) Add the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid into a reaction kettle, then add a catalyst, and carry out polycondensation reaction at 170°C for 5 h under nitrogen protection; after the reaction is completed, take the reaction product to obtain polyolefin-pyrene phosphate-polyester; among them, the weight ratio of polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid is 100:1.5:5; the dosage of the catalyst is 0.3% of the weight of polyolefin-pyrene phosphate intermediate; the catalyst is tetrabutyl titanate.

[0058] Preparation method: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt and extrude through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0059] Example 4 Preparation of High-Gloss Black Masterbatch for Non-Polar Plastics

[0060] Components in parts by weight of raw materials: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0061] The non-polar carrier resin is high-density polyethylene; the antioxidant is antioxidant 1010; the dispersant is composed of zinc stearate and polyolefin-pyrene phosphate-polyester with a weight ratio of 1:3; the preparation method of the polyolefin-pyrene phosphate-polyester is the same as that in Example 3.

[0062] Preparation method: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt and extrude through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0063] Example 5 Preparation of High-Gloss Black Masterbatch for Non-Polar Plastics

[0064] Components in parts by weight of raw materials: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

[0065] The non-polar carrier resin is high-density polyethylene; the antioxidant is antioxidant 1010; the dispersant is composed of ethylene bisstearamide and polyolefin-pyrene phosphate-polyester with a weight ratio of 1:3; the preparation method of the polyolefin-pyrene phosphate-polyester is the same as that in Example 3.

[0066] Preparation method: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt and extrude through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.

[0067] Add the high-gloss black masterbatch for non-polar plastics prepared in Examples 1-5 to high-density polyethylene at an addition amount of 2% by mass ratio to make an injection molding sample; test the glossiness (60° incident angle) of the injection molding sample according to ASTM D2457 standard; the test results are shown in Table 1.

[0068] Table 1. Glossiness Test Results

[0069] Test masterbatch type Glossiness of injection molded sample High-gloss black masterbatch for non-polar plastics prepared in Example 1 81 GU High-gloss black masterbatch for non-polar plastics prepared in Example 2 78 GU High-gloss black masterbatch for non-polar plastics prepared in Example 3 92 GU High-gloss black masterbatch for non-polar plastics prepared in Example 4 99 GU High-gloss black masterbatch for non-polar plastics prepared in Example 5 85 GU

[0070] As can be seen from the experimental results in Table 1, the glossiness of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Example 3 is much higher than that of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Examples 1 and 2. This shows that the choice of dispersant is crucial. In the high-gloss black masterbatch for non-polar plastics of the present invention, adding the polyolefin-pyrene phosphate-polyester dispersant prepared by the method of the present invention can significantly improve the glossiness of the high-gloss black masterbatch for non-polar plastics of the present invention when applied to non-polar plastics compared to adding a conventional dispersant.

[0071] As can be seen from the experimental results in Table 1, the glossiness of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Example 4 is further significantly higher than that of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Examples 1 and 3. This shows that the glossiness of the high-gloss black masterbatch for non-polar plastics prepared by adding a dispersant composed of zinc stearate and polyolefin-pyrene phosphate-polyester when applied to non-polar plastics is further significantly higher than that of the high-gloss black masterbatch for non-polar plastics prepared by adding a single zinc stearate or a single polyolefin-pyrene phosphate-polyester as a dispersant. Adding the high-gloss black masterbatch for non-polar plastics prepared by adding a dispersant composed of zinc stearate and polyolefin-pyrene phosphate-polyester can synergistically improve its glossiness when applied to non-polar plastics.

[0072] As can be seen from the experimental results in Table 1, the glossiness of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Example 5 is not further significantly higher or even higher than that of the injection-molded samples prepared by adding the high-gloss black masterbatch for non-polar plastics prepared in Examples 2 and 3. This shows that only the high-gloss black masterbatch for non-polar plastics prepared by adding a dispersant composed of zinc stearate and polyolefin-pyrene phosphate-polyester can synergistically improve its glossiness when applied to non-polar plastics; while the high-gloss black masterbatch for non-polar plastics prepared by adding a dispersant composed of other dispersants and polyolefin-pyrene phosphate-polyester cannot synergistically improve its glossiness when applied to non-polar plastics.

Claims

1. A high-gloss black masterbatch for non-polar plastics, characterized in that, It comprises the following components in parts by weight: 50 - 70 parts of carbon black; 30 - 50 parts of non-polar carrier resin; 3 - 8 parts of dispersant; 1 - 3 parts of antioxidant.

2. The high-gloss black masterbatch for non-polar plastics according to claim 1, characterized in that, It comprises the following components in parts by weight: 50 - 60 parts of carbon black; 30 - 40 parts of non-polar carrier resin; 3 - 6 parts of dispersant; 1 - 2 parts of antioxidant; Most preferably, the high-gloss black masterbatch for non-polar plastics comprises the following components in parts by weight: 54 parts of carbon black; 40 parts of non-polar carrier resin; 5 parts of dispersant; 1 part of antioxidant.

3. The high-gloss black masterbatch for non-polar plastics according to claim 1, wherein The non-polar carrier resin is polyethylene, polypropylene or polyvinyl chloride.

4. The high-gloss black masterbatch for non-polar plastics according to claim 1, characterized in that, The antioxidant is antioxidant 1010 or antioxidant 168.

5. The high-gloss black masterbatch for non-polar plastics according to claim 1, characterized in that The dispersant is selected from zinc stearate or ethylene bisstearamide.

6. The high-gloss black masterbatch for non-polar plastics according to claim 1, characterized in that, The dispersant is selected from polyolefin-pyrene phosphate-polyester.

7. The high-gloss black masterbatch for non-polar plastics according to claim 6, characterized in that, The polyolefin-pyrene phosphate-polyester is prepared by the following method: (1) Take isobutene monomer and solvent and add them to a reaction kettle, then add a catalyst, and react at 0 - 5°C for 2 - 4 h under nitrogen protection; after the reaction is completed, take the reaction product to obtain polyolefin; (2) Take polyolefin, 1-pyrenemethanol and solvent and add them to a reaction kettle, then add phosphorus pentoxide, and react at 80 - 100°C for 6 - 8 hours; after the reaction is completed, take the reaction product to obtain a polyolefin-pyrene phosphate intermediate; (3) Add the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid to a reaction kettle, then add a catalyst, and carry out polycondensation reaction at 160 - 180°C for 4 - 6 h under nitrogen protection; after the reaction is completed, take the reaction product to obtain polyolefin-pyrene phosphate-polyester.

8. The high-gloss black masterbatch for non-polar plastics according to claim 7, characterized in that, In step (2), the weight ratio of polyolefin, 1-pyrenemethanol and phosphorus pentoxide is 100:8 - 12:5 - 10.

9. The high-gloss black masterbatch for non-polar plastics according to claim 7, wherein, In step (3), the weight ratio of the polyolefin-pyrene phosphate intermediate, pentaerythritol and adipic acid is 100:1 - 2:4 - 6.

10. The preparation method of the high-gloss black masterbatch for non-polar plastics according to any one of claims 1 to 9, characterized in that, It comprises the following steps: Mix carbon black, non-polar carrier resin, dispersant and antioxidant evenly, and then melt and extrude them through a twin-screw extruder to obtain the high-gloss black masterbatch for non-polar plastics.