Green master batch free of free copper and preparation method of green master batch

Abstract

The invention discloses a green master batch free of free copper and a preparation method thereof. The green master batch is prepared from a carrier, a dispersing agent, titanium dioxide, blue pigment, yellow pigment, green pigment, an antioxidant, calcium silicate whiskers and glass powder according to a certain proportion. The green master batch does not contain free copper, the low-temperature toughness of the PPR green pipe can be effectively improved, the problem that the PPR green pipe is prone to being impacted and fractured in a low-temperature environment is solved, and the PP-R pipe prepared from the green master batch can be popularized and used at low temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic processing, and in particular relates to a green masterbatch containing no free copper and a preparation method thereof. Background Art

[0002] PP-R pipes are widely used in household hot and cold water systems because of their light weight, low price and good stability. However, phthalocyanine green is often added to green pipes. Phthalocyanine green contains free copper ions in its molecular structure. Free copper ions will reduce the toughness of PP-R pipes. In extremely cold conditions, especially in environments with temperatures below -10°C, PP-R pipes will rupture if subjected to certain external impacts, which seriously affects its transportation, construction and installation in low-temperature environments, and is not conducive to the promotion and use of products in low temperatures.

[0003] Therefore, it is necessary to prepare a green master batch that does not contain phthalocyanine green to improve the problem of poor toughness of green PPR pipes, so that they can cope with external force impacts under low temperature conditions without brittle cracking. Summary of the invention

[0004] Based on the above-mentioned prior art, the present invention provides a green master batch that does not contain free copper and a preparation method thereof. The green master batch does not contain free copper, can effectively improve the low-temperature toughness of PPR green pipes, solves the problem that PPR green pipes are easily impacted and ruptured in low-temperature environments, and enables the PP-R pipes prepared using the green master batch to be promoted and used at low temperatures.

[0005] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0006] A green masterbatch containing no free copper, prepared from the following raw materials:

[0007]

[0008] Furthermore, the carrier is at least one of polyethylene and polypropylene.

[0009] Furthermore, the dispersant is at least one of polyethylene wax, zinc stearate and vinyl bisstearamide.

[0010] Furthermore, the blue pigment is one or more of ultramarine, cobalt blue and iron blue.

[0011] Furthermore, the yellow pigment is one or more of lemon yellow, khaki and gamboge.

[0012] Furthermore, the green pigment includes at least one of art green, cobalt green and smectite pigment.

[0013] Furthermore, the antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant 1076.

[0014] A method for preparing a green masterbatch containing no free copper comprises the following steps:

[0015] S1, uniformly mixing a carrier, a dispersant, titanium dioxide, a blue pigment, a yellow pigment, a green pigment, an antioxidant, a calcium silicate whisker and a glass powder to obtain a mixed material;

[0016] S2, adding the mixed ingredients into a twin-screw extruder, extruding and granulating, and obtaining the green master batch containing no free copper.

[0017] Furthermore, when the twin-screw extruder is extruding, the processing temperature of the barrel is 170-200°C, wherein the extrusion temperature of the first section is 175-185°C, the extrusion temperature of the second section is 190-195°C, the extrusion temperature of the third section is 195-200°C, the die temperature is 200-210°C, and the screw speed is 80-100r / min.

[0018] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0019] 1. The green masterbatch of the present invention abandons the commonly used green pigment phthalocyanine green, and forms a green masterbatch with four colors of pigments including titanium dioxide, blue pigment, yellow pigment and green pigment, so that the prepared green masterbatch does not contain free copper ions, thereby avoiding the free copper ions affecting the low-temperature toughness of the prepared PP-R pipe.

[0020] 2. In the formula of the green masterbatch of the present invention, transparent calcium silicate whiskers and glass powder are used to replace part of the pigment. On the one hand, the amount of pigment can be reduced without affecting the color performance. On the other hand, the addition of inorganic fillers can further improve the low-temperature performance of the green masterbatch. Experiments show that the PPR green pipe prepared from the green masterbatch of the present invention can withstand the impact of a 1.0m high and 5kg drop hammer at -15°C, and the pipe does not break after the impact test. At the same time, the green pipe obtained does not burst under the 1000h hydrostatic test, and other performance indicators meet the requirements of the national standard GB / T18742.2-2017.

[0021] 3. The color difference ΔE between the green masterbatch of the present invention and the currently available masterbatch (the green masterbatch prepared with phthalocyanine green as the green pigment) is less than 1, the particles are uniform, the thermal stability is good, and the compatibility with the resin is good.

[0022] 4. The green masterbatch of the present invention has a simple formula, a simple and easy preparation process, a low preparation cost, and is suitable for industrial large-scale production. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to specific embodiments.

[0024] Example 1

[0025] A green masterbatch containing no free copper, prepared from the following raw materials:

[0026]

[0027] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0028] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010, antioxidant 168, calcium silicate whisker and glass powder to obtain a mixed material;

[0029] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0030] Example 2

[0031] A green masterbatch containing no free copper, prepared from the following raw materials:

[0032]

[0033]

[0034] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0035] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010, antioxidant 168, calcium silicate whisker and glass powder to obtain a mixed material;

[0036] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0037] Example 3

[0038] A green masterbatch containing no free copper, prepared from the following raw materials:

[0039]

[0040] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0041] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010, antioxidant 168, calcium silicate whisker and glass powder to obtain a mixed material;

[0042] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0043] Comparative Example 1

[0044] A green masterbatch containing no free copper, prepared from the following raw materials:

[0045]

[0046] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0047] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010, antioxidant 168 and calcium silicate whisker to obtain a mixed material;

[0048] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0049] Comparative Example 2

[0050] A green masterbatch containing no free copper, prepared from the following raw materials:

[0051]

[0052] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0053] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010, antioxidant 168 and glass powder to obtain a mixed material;

[0054] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0055] Comparative Example 3

[0056] A green masterbatch containing no free copper, prepared from the following raw materials:

[0057]

[0058] The preparation method of the above-mentioned green masterbatch not containing free copper is as follows:

[0059] 1. Evenly mix polypropylene, polyethylene wax, titanium dioxide, ultramarine, lemon yellow, art green, antioxidant 1010 and antioxidant 168 to obtain a mixed material;

[0060] S2, adding the mixed ingredients into a twin-screw extruder, setting the parameters of the twin-screw extruder as follows: the first section extrusion temperature of the barrel is 180°C, the second section extrusion temperature is 190°C, the third section extrusion temperature is 200°C, the die temperature is 205°C, and the screw speed is 90r / min. Extrusion granulation is performed to obtain the green master batch containing no free copper.

[0061] Comparative Example 4

[0062] The existing green masterbatch is prepared using phthalocyanine green as the green pigment.

[0063] The color difference between the green master prepared in Examples 1-3 and Comparative Examples 1-3 and the existing green master (Comparative Example 4) is shown in Table 1 below:

[0064] Green mother Color difference △E Example 1 0.27 Example 2 0.30 Example 3 0.32 Comparative Example 1 1.27 Comparative Example 2 1.06 Comparative Example 3 0.29

[0065] The green masterbatches prepared in Examples 1-3, Comparative Examples 1-3 and the green masterbatches prepared in Comparative Example 4 were used as raw materials to prepare PPR. The obtained PPR was subjected to a drop hammer impact test (resisting a drop hammer impact of 1.0 m high and 5 kg at -15°C) and a hydrostatic test (1000 h). The results are shown in the following table:

[0066]

Claims

1. A green master batch containing no free copper, characterized in that Prepared from the following raw materials:

2. The green master batch containing no free copper according to claim 1, characterized in that: The carrier is at least one of polyethylene and polypropylene.

3. The green master batch containing no free copper according to claim 1, characterized in that: The dispersant is at least one of polyethylene wax, zinc stearate and vinyl bisstearamide.

4. The green master batch containing no free copper according to claim 1, characterized in that: The blue pigment is one or a combination of ultramarine, cobalt blue and iron blue.

5. The green master batch containing no free copper according to claim 1, characterized in that: The yellow pigment is one or a combination of lemon yellow, khaki and gamboge.

6. The green master batch containing no free copper according to claim 1, characterized in that: The green pigment comprises at least one of art green, cobalt green and green earth pigment.

7. The green master batch containing no free copper according to claim 1, characterized in that: The antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant 1076.

8. A method for preparing a green master batch containing no free copper as claimed in claim 1, characterized in that The steps include: S1, uniformly mixing a carrier, a dispersant, titanium dioxide, a blue pigment, a yellow pigment, a green pigment, an antioxidant, a calcium silicate whisker and a glass powder to obtain a mixed material; S2, adding the mixed ingredients into a twin-screw extruder, extruding and granulating, and obtaining the green master batch containing no free copper.

9. The method for preparing a green master batch containing no free copper according to claim 7, characterized in that: During extrusion by the twin-screw extruder, the processing temperature of the barrel is 170-200°C, wherein the extrusion temperature of the first stage is 175-185°C. The second extrusion temperature is 190-195°C, the third extrusion temperature is 195-200°C, and the die temperature is 200-210°C. The screw speed is 80-100r / min.

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