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Weather-resistant color master batch and preparation method thereof

A color masterbatch, weather-resistant technology, applied in the field of plastic additives, can solve the problems of reducing physical and mechanical properties such as tensile strength, elongation and aging resistance, increasing the manufacturing cost of color masterbatch, and low pigment dispersibility. Improve mechanical properties, good coloring effect, improve the effect of dispersibility

Active Publication Date: 2022-03-29
QINGDAO ZHOUSHI PLASTIC PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formula design is to add a certain amount of dispersant to the raw materials to reduce the melt viscosity and improve the dispersibility of the pigment in the carrier resin. However, too much dispersant will not only increase the manufacturing cost of the masterbatch, but also reduce Physical and mechanical properties such as tensile strength, elongation, and aging resistance of the product
The process is improved to replace the dry mixing process with the wet process. At present, most domestic small and medium-sized enterprises use the dry mixing process to prepare the color masterbatch. The process method is to mix the carrier resin, pigment, dispersant and other raw materials at high speed. The color masterbatch is obtained after melting, extrusion and granulation. This method has a simple process and is easy to operate, but the dispersion of the pigment in the resin is low; while the wet process is to first mix the pigment, dispersant and water, etc. After mixing, the pre-dispersed pigment is obtained by sand milling, phase inversion, water washing and drying, and then the pre-dispersed pigment and resin are mixed, melted, extruded and granulated. Dispersion in the carrier resin, but the process is more complicated, which increases the production cost
Therefore, there are still some problems with the current masterbatch

Method used

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  • Weather-resistant color master batch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0043] Preparation example 1 of modified titanium dioxide: ① Take calcium silicate, grind and sieve it to obtain calcium silicate powder with a particle size of 1-5 μm; add 0.1 kg of silane to 10 kg of calcium silicate powder Coupling agent KH570 and 3kg of lithium silicate were ground for 4 hours at a speed of 2000r / min to obtain a silicate mixture;

[0044] ② Take rutile titanium dioxide, grind it and sieve it to obtain titanium dioxide micropowder with a particle size of 1-5 μm; add 0.5kg polycarboxylate sodium salt dispersant and 200kg water to 10kg titanium dioxide micropowder, and use 2000r / min speed, stir 30min, obtain titanium dioxide slurry;

[0045] ③Add 1-3kg of silicate mixture to the titanium dioxide slurry, stir at a speed of 2000r / min for 30min, and stand at a temperature of 70-80°C for 4-6h to obtain a titanium dioxide-silicate slurry;

[0046] ④Add 30kg, 5wt% aluminum sulfate solution dropwise to the titanium dioxide-silicate slurry within 1h. After the drop...

preparation example 2

[0048] Preparation example 2 of modified titanium dioxide: ① Take calcium silicate, grind and sieve it to obtain calcium silicate powder with a particle size of 1-5 μm; add 0.15 kg of KH791 to 10 kg of calcium silicate powder And 4kg lithium silicate, after grinding it at a speed of 3000r / min for 3h, obtain a silicate mixture;

[0049] ② Take rutile titanium dioxide, grind it and sieve it to obtain titanium dioxide micropowder with a particle size of 1-5 μm; add 0.75kg polycarboxylate sodium salt dispersant and 250kg water to 10kg titanium dioxide micropowder, and use 2000r / min speed, stir 30min, obtain titanium dioxide slurry;

[0050] ③Add 2kg of silicate mixture (selected from the preparation example 2 of silicate mixture) to the titanium dioxide slurry, stir for 30min at a speed of 2000r / min, and stand for 5h at a temperature of 75°C to obtain titanium dioxide- Silicate slurry;

[0051] ④Add 35kg, 5wt% aluminum sulfate solution dropwise to the titanium dioxide-silicate ...

preparation example 3

[0053] Preparation example 3 of modified titanium dioxide: ① Take calcium silicate, grind and sieve it to obtain calcium silicate powder with a particle size of 1-5 μm; add 0.1 kg of silane to 10 kg of calcium silicate powder Coupling agent KH570, 0.1kg silane coupling agent KH791 and 5kg lithium silicate were ground at a speed of 4000r / min for 2h to obtain a silicate mixture;

[0054] ② Take rutile titanium dioxide, grind it and sieve it to obtain titanium dioxide micropowder with a particle size of 1-5 μm; add 1kg polycarboxylate sodium salt dispersant and 300kg water to 10kg titanium dioxide micropowder, and use 2000r / / min speed, stirred for 30min to obtain titanium dioxide slurry;

[0055] ③Add 3kg of silicate mixture (selected from the preparation example 3 of silicate mixture) to the titanium dioxide slurry, stir for 30min at a speed of 2000r / min, and leave it for 6h at a temperature of 80°C to obtain titanium dioxide- Silicate slurry;

[0056] ④Add 40kg, 5wt% aluminu...

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Abstract

The invention relates to the field of plastic additives, and particularly discloses a weather-resistant color master batch and a preparation method thereof. The weather-resistant color master batch is prepared from the following raw materials in parts by weight: 30 to 40 parts of polyethylene resin, 55 to 65 parts of pigment, 4 to 8 parts of antioxidant and 0 to 1 part of pigment dispersing agent, the polyethylene resin is composed of LDPE and LLDPE in a weight ratio of 3: 1; the density of the LDPE is 0.924 g / cm < 3 >, and the melt index of the LDPE is 1.9 g / 10min; the density of the LLDPE is 0.920 g / cm < 3 >, and the melt index of the LLDPE is 2.0 g / 10min. The preparation method comprises the following steps: blending the raw materials, carrying out melt extrusion, granulating, and drying. The weather-resistant color master batch provided by the invention has the advantages of good weather resistance and uniform pigment dispersion.

Description

technical field [0001] The application relates to the field of plastic additives, more specifically, it relates to a weather-resistant color masterbatch and a preparation method thereof. Background technique [0002] Masterbatches, also known as color masterbatches and plastic masterbatches, are plastic colorants that are well dispersed with a high proportion of pigments or dyes and thermoplastic resins; for special color masterbatches, since the same resin as plastic products is used As a carrier, it has good compatibility with plastic resins, and is easier to disperse in plastic products after it is heated and melted, which is beneficial to improve the color stability of plastic products. [0003] Usually, masterbatches are made of pigments, carriers, dispersants and additives. In the prior art, the patent application document with application number 200810122122.2 discloses a general-purpose white masterbatch and its preparation method. The white masterbatch is composed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/10C08K3/22C08K3/34C08K5/134C08K5/526C08J3/22
CPCC08J3/226C08J2423/06C08J2423/08C08K13/06C08K9/10C08K2003/2241C08K3/34C08K5/1345C08K5/526
Inventor 李双利周锐
Owner QINGDAO ZHOUSHI PLASTIC PACKAGE
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