Universal color master batch and preparation method thereof

Abstract

The invention discloses a general color master batch and a preparation method thereof, and belongs to the technical field of color master batches. The universal color master batch is prepared from a dispersing agent, carrier resin, toner, a lubricating agent, an ultraviolet absorbent and an antioxidant. Wherein the dispersing agent is polyethylene wax, and the carrier resin is PE; the lubricant is paraffin; the ultraviolet absorbent is a compound composition of a hindered amine light stabilizer 770 and a light stabilizer UV-327; and the antioxidant is a compound composition of an antioxidant 1010 and an antioxidant 264. The general color master batch has excellent color master batch melt index and dispersity, and the weather-proof color difference is as low as 0.56, so that the color master batch can be applied to different raw materials as the general color master batch, the defects that the color difference of the general color master batch in different materials is large and the color of a finished product is difficult to predict are overcome, the product quality of the color master batch can be improved, and the application range of the general color master batch is expanded; the economic value is relatively high.

Description

Technical Field

[0001] The present invention relates to the technical field of color master batches, and particularly relates to a general color master batch and a preparation method thereof. Background Art

[0002] The full name of Color Master Batch is color masterbatch, also called colorant, which is a new type of special coloring agent for polymer materials, also known as Pigment Preparation. Color masterbatch is mainly used in plastics. It consists of three basic elements: pigment or dye, carrier and additive. It is an aggregate obtained by uniformly loading an ultra-large amount of pigment into resin, so its coloring power is higher than that of the pigment itself. During processing, a small amount of color masterbatch is blended with uncolored resin to obtain a colored resin or product with the designed pigment concentration.

[0003] There are various classifications of color masterbatches. According to different uses, color masterbatches are divided into injection color masterbatch, blow molding color masterbatch, spinning color masterbatch, etc., and each variety can be divided into different grades. According to different functions, they are divided into antistatic, flame retardant, anti-aging, antibacterial, whitening and brightening, increasing transparency, weather resistance, matting, pearlescent, imitation marble pattern (flow pattern), wood grain color masterbatches, etc. According to different colors, they are divided into black, white, yellow, green, red, orange, brown, blue, silver, gold, purple, gray, pink color masterbatches, etc. According to the usage of users, they are divided into general color masterbatch and special color masterbatch. Among them, the special color masterbatch has a single use. For example, PVC color masterbatch can only be used for coloring PVC products and cannot be used for coloring other plastics. Nevertheless, the special color masterbatch has good coloring effect and low price, so there are many manufacturers and large production volume. The general color masterbatch is also called universal color masterbatch. The general color masterbatch has a wider range of uses than the special color masterbatch and can be used for coloring plastics of different materials. Therefore, developing this variety of color masterbatch can reduce the production cost of manufacturers. The same color masterbatch can meet different product requirements and has a broader market space. However, the general color masterbatch has obvious color difference and poor predictability of coloring effect, resulting in greater development difficulty compared with the special color masterbatch. Therefore, the production technology of this kind of color masterbatch is not mature enough and there is a large room for improvement in product performance. Summary of the Invention

[0004] Aiming at the above-mentioned prior art, the purpose of the present invention is to provide a general color masterbatch and a preparation method thereof.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] In the first aspect of the present invention, a general color masterbatch is provided. The general color masterbatch comprises the following raw materials in parts by mass:

[0007] 1 - 5 parts of dispersant, 30 - 80 parts of carrier resin, 10 - 30 parts of color powder, 0.1 - 4 parts of lubricant, 0.1 - 3 parts of ultraviolet absorber, 0.1 - 3 parts of antioxidant;

[0008] The carrier resin is PE; the ultraviolet absorber is a compound composition composed of hindered amine light stabilizer 770 and light stabilizer UV - 327 in a weight ratio of (1 - 2):(1 - 2).

[0009] Furthermore, the dispersant is polyethylene wax.

[0010] Furthermore, the lubricant is paraffin wax.

[0011] Furthermore, the antioxidant is a compound composition composed of antioxidant 1010 and antioxidant 264 in a weight ratio of 1:(0.5 - 5).

[0012] In the second aspect of the present invention, a preparation method of the general masterbatch is provided, and the preparation method includes the following steps:

[0013] (1) Take the dispersant, carrier resin, color powder and lubricant by mass parts, knead and then crush to obtain crushed materials;

[0014] (2) Mix the antioxidant, ultraviolet absorber and the crushed materials obtained in step (1) evenly by mass parts to obtain a mixed material;

[0015] (3) Extrude the mixed material obtained in step (2), cool, dry and pelletize to obtain the general masterbatch.

[0016] Furthermore, the kneading temperature is 180°C - 240°C; the kneading time is 10 min - 30 min.

[0017] Furthermore, the mixing time is 2 min - 10 min.

[0018] Furthermore, the extrusion temperature is 140°C - 190°C.

[0019] The beneficial effects of the present invention:

[0020] The present invention prepares a general masterbatch using a dispersant, a carrier resin, a color powder, a lubricant, an ultraviolet absorber, and an antioxidant. Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is a compound composition of hindered amine light stabilizer 770 and light stabilizer UV-327; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264. This general masterbatch has excellent melt index and dispersibility of the masterbatch, and the weathering color difference is as low as 0.56, which is beneficial to the application of this masterbatch as a general masterbatch in different raw materials, overcomes the disadvantages of large color differences of general masterbatches in different materials and unpredictable finished product colors, can improve the product quality of the masterbatch, expand the application range of general masterbatches, and has high economic value. Detailed Description of the Invention

[0021] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0022] In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below in combination with specific embodiments.

[0023] The test materials not specifically described used in the embodiments of the present invention are all conventional test materials in the art and can be obtained through commercial channels. In the present invention, the CAS number of hindered amine light stabilizer 770 is 52829-07-9, the CAS number of light stabilizer UV-327 is 3864-99-1; the CAS number of antioxidant 1010 is 6683-19-8; the CAS number of antioxidant 264 is 128-37-0. The CAS number of polyethylene (PE) is 9002-88-4.

[0024] Example 1

[0025] In parts by mass, the general masterbatch of the present invention is prepared from the following raw materials:

[0026] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of ultraviolet absorber; 0.3 part of antioxidant.

[0027] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is a compound composition of hindered amine light stabilizer 770 and light stabilizer UV-327 with a weight ratio of 1:1; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0028] The specific preparation steps of the masterbatch are as follows:

[0029] (1) Take a dispersant, a carrier resin, a color powder, and a lubricant, and put them into a kneader according to parts by mass. Knead at 210 °C for 18 min and then crush.

[0030] (2) Mix an antioxidant, an ultraviolet absorber, and the crushed material obtained in step (1) proportionally in a mixer until evenly mixed, with a mixing time of 5 min.

[0031] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperatures of each zone of the extruder are 170 °C. After cooling, drying, pelletizing, and packaging, masterbatch is obtained.

[0032] Example 2

[0033] The general masterbatch of the present invention is prepared from the following raw materials by parts by mass:

[0034] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of ultraviolet absorber; 0.3 part of antioxidant.

[0035] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is a compound composition of hindered amine light stabilizer 770 and light stabilizer UV-327 with a weight ratio of 1:2; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0036] The specific preparation steps of the masterbatch are as follows:

[0037] (1) Take a dispersant, a carrier resin, a color powder, and a lubricant, and put them into a kneader according to parts by mass. Knead at 210 °C for 18 min and then crush.

[0038] (2) Mix an antioxidant, an ultraviolet absorber, and the crushed material obtained in step (1) proportionally in a mixer until evenly mixed, with a mixing time of 5 min.

[0039] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperatures of each zone of the extruder are 170 °C. After cooling, drying, pelletizing, and packaging, masterbatch is obtained.

[0040] Example 3

[0041] The general masterbatch of the present invention is prepared from the following raw materials by parts by mass:

[0042] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of ultraviolet absorber; 0.3 part of antioxidant.

[0043] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is a compound composition of hindered amine light stabilizer 770 and light stabilizer UV-327 with a weight ratio of 2:1; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0044] The specific preparation steps of the color masterbatch are as follows:

[0045] (1) Take the dispersant, carrier resin, color powder and lubricant, and put them into a kneader according to the mass parts, knead at 210 °C for 18 min and then crush.

[0046] (2) Mix the antioxidant and ultraviolet absorber with the crushed material obtained in step (1) proportionally in a mixer until evenly mixed, and the mixing time is 5 min.

[0047] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperature of each zone of the extruder is 170 °C. After cooling, drying, pelletizing and packaging, color masterbatch pellets are obtained.

[0048] Comparative Example 1

[0049] The difference between this Comparative Example 1 and Example 1 is that no ultraviolet absorber is used in the raw materials, and the details are as follows:

[0050] In terms of mass parts, the general color masterbatch of the present invention is prepared from the following raw materials:

[0051] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of antioxidant.

[0052] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0053] The specific preparation steps of the color masterbatch are as follows:

[0054] (1) Take the dispersant, carrier resin, color powder and lubricant, and put them into a kneader according to the mass parts, knead at 210 °C for 18 min and then crush.

[0055] (2) Mix the antioxidant and ultraviolet absorber with the crushed material obtained in step (1) proportionally in a mixer until evenly mixed, and the mixing time is 5 min.

[0056] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperature of each zone of the extruder is 170 °C. After cooling, drying, pelletizing and packaging, color masterbatch pellets are obtained.

[0057] Comparative Example 2

[0058] The difference between Comparative Example 1 and Example 1 is that the ultraviolet absorber used in the raw materials is the hindered amine light stabilizer 770, specifically as follows:

[0059] By mass, the general masterbatch of the present invention is prepared from the following raw materials:

[0060] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of ultraviolet absorber; 0.3 part of antioxidant.

[0061] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is the hindered amine light stabilizer 770; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0062] The specific preparation steps of the masterbatch are as follows:

[0063] (1) Take the dispersant, carrier resin, color powder and lubricant, and put them into a kneader according to the mass parts, knead at 210 °C for 18 min and crush;

[0064] (2) Mix the antioxidant and the ultraviolet absorber with the crushed material obtained in step (1) evenly in a mixer, and the mixing time is 5 min;

[0065] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperatures of each zone of the extruder are 170 °C. After cooling, drying, pelletizing and packaging, masterbatch pellets are obtained.

[0066] Comparative Example 3

[0067] The difference between Comparative Example 1 and Example 1 is that the ultraviolet absorber used in the raw materials is the light stabilizer UV-327, specifically as follows:

[0068] By mass, the general masterbatch of the present invention is prepared from the following raw materials:

[0069] 2 parts of dispersant; 60 parts of carrier resin; 20 parts of color powder; 0.4 part of lubricant; 0.3 part of ultraviolet absorber; 0.3 part of antioxidant.

[0070] Among them, the dispersant is polyethylene wax, the carrier resin is PE; the lubricant is paraffin wax; the ultraviolet absorber is the light stabilizer UV-327; the antioxidant is a compound composition of antioxidant 1010 and antioxidant 264 with a weight ratio of 1:2.

[0071] The specific preparation steps of the masterbatch are as follows:

[0072] (1) Take the dispersant, carrier resin, color powder and lubricant, and put them into a kneader according to the mass parts, knead at 210 °C for 18 min and crush;

[0073] (2) Mix the antioxidant, ultraviolet absorber and the crushed material obtained in step (1) evenly in a mixer for 5 minutes.

[0074] (3) Add the mixture obtained in step (2) to a twin-screw extruder for extrusion. The temperature of each zone of the extruder is 170 °C. After cooling, drying, pelletizing and packaging, masterbatch is obtained.

[0075] Test Example 1: Effect verification test

[0076] Verify the effects of the above Examples 1-3 and Comparative Examples 1-3. The test items include the melt index, dispersibility and weather resistance color difference of the masterbatch.

[0077] Among them, the measurement method of the melt index of the masterbatch is based on "GB / T 3682.1-2018 Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 1: Standard method", with the condition of 230 °C / 2.16 Kg; the measurement method of dispersibility is based on "GB / T 18251-2019 Determination of the dispersion of pigments or carbon black in polyolefin pipes, fittings and compounds"; the measurement method of weather resistance color difference is based on "GB / T 16422.2-2022 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps".

[0078] The results of the effect verification tests of Examples 1-3 and Comparative Examples 1-3 are shown in Table 1.

[0079] Table 1 Results of effect verification test

[0080]

[0081] It can be seen that during the preparation of the masterbatch, using the compound composition of hindered amine light stabilizer 770 and light stabilizer UV-327 as the ultraviolet absorber can significantly reduce the weather resistance color difference of the masterbatch. Especially in the scheme of Example 1, the weather resistance color difference of the masterbatch is reduced to 0.56, which is beneficial for the masterbatch to be used as a general masterbatch in different raw materials, overcoming the disadvantages of large color difference of general masterbatch in different materials and difficult prediction of the finished product color, improving the product quality of the masterbatch and expanding the application range of general masterbatch.

[0082] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A general masterbatch, characterized in that, The general masterbatch described above comprises raw materials in the following parts by mass: 1 - 5 parts of dispersant, 30 - 80 parts of carrier resin, 10 - 30 parts of color powder, 0.1 - 4 parts of lubricant, 0.1 - 3 parts of ultraviolet absorber, 0.1 - 3 parts of antioxidant; The carrier resin is PE; the ultraviolet absorber is a compound composition composed of hindered amine light stabilizer 770 and light stabilizer UV - 327 in a weight ratio of (1 - 2):(1 - 2).

2. The general color masterbatch according to claim 1, characterized in that, The dispersant is polyethylene wax.

3. The universal color masterbatch according to claim 1, characterized in that, The lubricant is paraffin wax.

4. The general color masterbatch according to claim 1, characterized in that, The antioxidant is a compound composition composed of antioxidant 1010 and antioxidant 264 in a weight ratio of 1:(0.5 - 5).

5. The preparation method of the general masterbatch according to any one of claims 1-4, characterized in that, The preparation method comprises the following steps: (1) Take the dispersant, carrier resin, color powder and lubricant according to the parts by mass, knead and then crush to obtain crushed material; (2) Mix the antioxidant, ultraviolet absorber and the crushed material obtained in step (1) evenly according to the parts by mass to obtain a mixed material; (3) Extrude the mixed material obtained in step (2), cool, dry and pelletize to obtain the general masterbatch.

6. The preparation method of the universal color masterbatch according to claim 5, characterized in that, The temperature of kneading is 180°C - 240°C; the time of kneading is 10 min - 30 min.

7. The preparation method of the general masterbatch according to claim 5, characterized in that, The mixing time is 2 min - 10 min.

8. The preparation method of the general masterbatch according to claim 5, characterized in that, The temperature during extrusion is 140°C - 190°C.

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