阅读说明：本技术 一种着色剂预分散体及其制备方法与应用、一种色母 (Colorant pre-dispersion, preparation method and application thereof, and color master batch ) 是由 桂俊靓 周强 谢秉昆 于 2020-06-23 设计创作，主要内容包括：本发明提供了一种着色剂预分散体及其制备方法与应用、一种色母,属于颜料技术领域。按重量百分数计,着色剂预分散体的原料成分包括15-59％的聚合物材料、41-80％的无机颜料及不超过5％的分散剂。该着色剂预分散体由各成分加热混合后挤出成型制得。混合过程中至少一部分聚合物材料呈熔融状态。其将无机颜料的浓度提高至41-80wt％,能够在减少低分子蜡的含量或不加蜡的情况下,提高无机母粒的着色强度和分散性。其制备方法包括将着色剂预分散体的各成分加热混合后挤出成型。该方法简单,适于工业化生产。上述着色剂预分散体可用于制备色母,由上述着色剂预分散体制备的色母成本低,生产过程无粉尘,加工效率高、色差控制率好。(The invention provides a colorant pre-dispersion, a preparation method and application thereof, and a color master batch, and belongs to the technical field of pigments. The raw material components of the colorant pre-dispersion comprise 15-59% of polymer material, 41-80% of inorganic pigment and no more than 5% of dispersing agent by weight percentage. The colorant pre-dispersion is prepared by heating, mixing and extruding the components. At least a portion of the polymeric material is in a molten state during the mixing process. The concentration of the inorganic pigment is increased to 41-80 wt%, and the coloring strength and the dispersibility of the inorganic master batch can be improved under the condition of reducing the content of low molecular wax or not adding the wax. The preparation method comprises the steps of heating, mixing and extruding the components of the colorant pre-dispersion. The method is simple and suitable for industrial production. The colorant pre-dispersion can be used for preparing color master batches, and the color master batches prepared from the colorant pre-dispersion have the advantages of low cost, no dust in the production process, high processing efficiency and good color difference control rate.)

1. A colorant pre-dispersion, which is characterized in that the raw material components of the colorant pre-dispersion comprise 15 to 59 percent of polymer material, 41 to 80 percent of inorganic pigment and no more than 5 percent of dispersant by weight percentage;

the colorant pre-dispersion is prepared by heating, mixing and then extruding and molding all the components; at least a portion of the polymeric material is in a molten state during mixing;

the polymer material comprises at least one of polyolefin resin, polyethylene resin, ethylene copolymer, ethylene-vinyl acetate copolymer and polyolefin elastomer;

preferably, the raw material components include 15% of the polyolefin resin, 80% of the inorganic pigment, and 5% of the dispersant.

2. The colorant pre-dispersion according to claim 1, wherein the colorant pre-dispersion has a tinctorial strength of 100-103%.

3. The colorant pre-dispersion of claim 1, wherein the inorganic pigment comprises any one of an oxide series, sulfides, carbon and carbonates, chromium based pigments, iron oxide pigments, metal oxides, ultramarine pigments, and bismuth vanadate;

preferably, the oxide series comprises titanium dioxide, zinc white or iron manganese black;

preferably, the sulfide comprises zinc sulfide or lithopone;

preferably, the carbon and carbonate comprises lead white, carbon black or calcium carbonate;

preferably, the chromium-based pigment comprises chrome yellow, molybdate red or chrome green;

preferably, the iron oxide pigment comprises iron yellow, zinc iron yellow, iron red, iron brown or iron oxide black;

preferably, the metal oxide comprises titanium yellow, cobalt blue, cobalt green or titanium brown;

preferably, the ultramarine pigment comprises ultramarine blue or ultramarine violet;

preferably, the bismuth vanadate comprises bismuth yellow.

4. The colorant pre-dispersion of claim 1, wherein the dispersant comprises at least one of a polyethylene wax, a hyperdispersant, and a micropowder.

5. The method of preparing a colorant pre-dispersion according to any of claims 1 to 4, comprising the steps of: and heating, mixing and extruding the components of the colorant pre-dispersion.

6. The method according to claim 5, wherein the heating and mixing are carried out by continuously mixing the respective components at 50 to 100 ℃ for 10 to 30 minutes.

7. The production method according to claim 5, wherein the extrusion molding is single-screw extrusion or twin-screw extrusion;

preferably, the extrusion is carried out in twin screws, more preferably, the twin screw extruder is provided with a vacuum degassing device;

preferably, the temperature of each zone of the extruder and the temperature of the die head are both 90-200 ℃;

preferably, an extruder with seven zones is adopted, and the temperatures of the first zone to the seventh zone are 60-140 ℃, 90-160 ℃, 130-;

preferably, the screw speed during extrusion is 400-600 rpm.

8. The method according to claim 7, wherein the heated and mixed material is cooled, crushed and then extruded to form;

preferably, the shaped material is pelletized and separated.

9. Use of the colorant pre-dispersion according to any of claims 1 to 4 for the preparation of a color concentrate.

10. Color concentrate comprising a colorant pre-dispersion according to any of claims 1 to 4.

Technical Field

The invention relates to the technical field of pigments, in particular to a colorant pre-dispersion, a preparation method and application thereof, and a color master batch.

Background

The Color Master Batch is called Color Master Batch, also called Color seed, and is a special colorant for high molecular materials. The color master batch is composed of three basic elements of a plurality of pigments or dyes, a carrier and an additive, and particles are prepared by uniformly loading an excessive amount of pigment into resin. Because the coloring power of the pigment is superior to that of the pigment, the pigment has no dust pollution, the addition proportion is low, the pigment is easy to be mixed with coloring resin, and the pigment can widely replace powdery pigment in thermoplastic plastic coloring at present. At present, the preparation of the color master needs to disperse the powdery pigment in resin through processing, and dust floating pollution caused by directly using the powdery pigment causes difficult processing and troubles the coloring master industry due to safety and occupational health risks, so that the development of the colorant pre-dispersion is promoted.

Compared with the traditional toner, the granular colorant prepared by dispersing a single colorant in a carrier has the advantages of no dust, higher tinting strength, stability and better dispersibility, and can greatly improve the color master batch capacity. At present, pigment pre-dispersions mainly comprise two types, one is a pre-dispersion pigment taking oligomer wax as a main carrier, and the other is a single-color master batch taking polymer resin as a main carrier. For the last century, some european and american companies began using colorant pre-dispersions as raw materials to replace the coloring of toner on plastics. Currently, the concentration of the monochromatic master batch prepared by local companies is usually very low, and is generally 10 to 30 percent of the pigment concentration; the pigment concentration of 40-60% can be achieved by Europe and America pigment company, but the materials are easy to agglomerate, the tinting strength is not high, the processing is inconvenient and the price is high.

In view of this, the present application is specifically made.

Disclosure of Invention

The first object of the present invention includes providing a colorant pre-dispersion, which is prepared by increasing the concentration of inorganic pigment to 41-80 wt% while using a polymer material such as polyolefin resin as a main carrier, and can improve the color strength and dispersibility of the colorant pre-dispersion with a reduced content of low molecular wax or without adding wax in the prior art.

The second object of the present invention is suitable for industrial production for providing a process for the preparation of a pre-dispersion from the above colorant, which process is simple and suitable for industrial production.

A third object of the present invention consists in providing the use of a predispersion of the above colorant, for example for the preparation of masterbatches.

The fourth object of the invention is to provide a color master batch containing the colorant pre-dispersion, which has the advantages of low cost, no dust in the production process, high processing efficiency and good color difference control rate.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the application provides a colorant pre-dispersion, which comprises the following raw material components, by weight, 15-59% of polymer material, 41-80% of inorganic pigment and no more than 5% of dispersing agent. The colorant pre-dispersion is prepared by heating, mixing and extruding the components. At least a portion of the polymeric material is in a molten state during the mixing process.

Wherein the polymer material comprises at least one of polyolefin resin, polyethylene resin, ethylene copolymer, ethylene-vinyl acetate copolymer and polyolefin elastomer.

Alternatively, the raw material components include 15% of polyolefin resin, 80% of inorganic pigment, and 5% of dispersant.

Alternatively, the colorant pre-dispersion has a tinting strength of 100-103%.

Alternatively, the inorganic pigment includes any one of oxide series, sulfide, carbon and carbonate, chromium series pigment, iron oxide pigment, metal oxide, ultramarine pigment, and bismuth vanadate.

Alternatively, the oxide series includes titanium dioxide, zinc white, or iron manganese black.

Alternatively, the sulfide comprises zinc sulfide or lithopone.

Alternatively, the carbon and carbonate include lead white, carbon black or calcium carbonate.

Optionally, the chromium-based pigment comprises chrome yellow, molybdate red or chrome green.

Alternatively, the iron oxide pigment comprises iron yellow, zinc iron yellow, iron red, iron brown, or iron oxide black.

Alternatively, the metal oxide comprises titanium yellow, cobalt blue, cobalt green or titanium brown.

Optionally, the ultramarine pigment comprises ultramarine blue or ultramarine violet.

Optionally, the bismuth vanadate comprises bismuth yellow.

Optionally, the dispersant comprises at least one of a polyethylene wax, a hyperdispersant, and a micropowder.

In addition, the application also provides a preparation method of the colorant pre-dispersion, which comprises the following steps: heating and mixing the components of the colorant pre-dispersion, and then extruding and molding.

Optionally, the heating and mixing is carried out by continuously mixing the components at 50-100 deg.C for 10-30 min.

Alternatively, the extrusion molding is single screw extrusion or twin screw extrusion.

Optionally in twin screw extrusion, preferably the twin screw extruder is provided with a vacuum degassing device.

Alternatively, the extruder zones and die temperatures are from 90 to 200 ℃.

Optionally, an extruder with seven zones is used for extrusion, the temperatures of the first zone to the seventh zone are 60-140 ℃, 90-160 ℃, 130-.

Optionally, the screw speed during extrusion is 400-.

Optionally, the heated and mixed material is cooled, crushed and then extruded for molding.

Optionally, the shaped material is pelletized and separated.

In addition, the application also provides an application of the colorant pre-dispersion in color masterbatch.

In addition, the application also provides a color master batch, and the plastic contains the colorant pre-dispersion.

The colorant pre-dispersion, the preparation method and the application thereof, and the color master batch have the beneficial effects that:

the concentration of the inorganic pigment contained in the colorant pre-dispersion (monochromatic inorganic master batch) is as high as 41-80 wt%, so that the color master batch formula is flexible in design, the content of the used dispersing agent is only not more than 5 wt%, and even if the dispersing agent contains wax, the content of the wax in the whole raw material is not more than 5 wt% at most, thereby being beneficial to avoiding the problem that the mixed material is easy to agglomerate due to excessive wax. The components are heated, mixed and then extruded for molding, at least a part of polymer material is in a molten state by physically heating the mixed material, so that the polymer material and the inorganic pigment form a uniform system.

The preparation method is simple and suitable for industrial production. The colorant pre-dispersion can be used for preparing color master batch, the production process has no dust, the processing efficiency is high, the obtained color master batch has low cost and good color difference control rate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The colorant pre-dispersion, the preparation method and the application thereof, and a color master batch provided by the present application are specifically described below.

The inventor finds that the prior colorant pre-dispersion is mainly divided into two types, wherein the main carrier of one type is wax and other dispersing agents, the content of the carrier in the dispersion is 40-60 wt%, and the content of the pigment in the dispersion is only 40-60 wt%, and the products have the problems of easy agglomeration and oxidative degradation of the mixed material and precipitation risk of the products due to the excessive content of the wax; another class of primary carriers are resins and waxes, wherein the resin is present in the dispersion in an amount of 50 to 75 wt.%, the wax is present in the dispersion in an amount of 3 to 20 wt.%, and the pigment is present in the dispersion in a concentration of less than 40 wt.%, which have an effect on the color concentrate cost and formulation design, while at the same time presenting a risk of oxidation.

In view of this, the colorant pre-dispersion of the present application, i.e., the mono-color inorganic master batch, is specifically proposed.

The raw material components of the colorant pre-dispersion (monochromatic inorganic master batch) comprise 15-59% of polymer material, 41-80% of inorganic pigment and no more than 5% of dispersing agent by weight percentage.

The polymer material includes at least one of polyolefin resin, polyethylene resin, ethylene copolymer, ethylene-vinyl acetate copolymer, and polyolefin elastomer.

Further, the raw material components may include 15% of polyolefin resin, 80% of inorganic pigment, and 5% of dispersing agent.

The monochromatic inorganic master batch provided by the application has the advantages that the concentration of the inorganic pigment contained in the monochromatic inorganic master batch is as high as 41-80 wt%, the formula design of the color master batch is flexible, the content of the used dispersing agent is only not more than 5 wt%, and even if the dispersing agent contains wax, the content of the wax in the whole raw material is not more than 5 wt% at most, so that the problem that the mixed material is easy to agglomerate due to excessive wax is avoided.

However, because the contents of the resin and the dispersant used as the carriers are reduced compared with the prior art, especially the content of the dispersant is greatly reduced, and the content of the inorganic pigment is improved, the problem of poor dispersibility of the inorganic pigment is easily caused in the existing preparation process, in view of the above, in the application, the components are particularly heated, mixed and then extruded for molding, and the dispersibility of the raw material components can be effectively improved by physically heating the mixed material compared with the existing cold mixing (directly mixing at normal temperature) process, so that the high-concentration monochromatic inorganic master batch can be obtained while the dispersibility is ensured, and the coloring strength of the master batch is improved.

Alternatively, the inorganic pigment may include any one of an oxide series, a sulfide, carbon and carbonate, a chromium series pigment, an iron oxide pigment, a metal oxide, an ultramarine pigment, and bismuth vanadate, for example.

Among them, the oxide series may include titanium dioxide (c.i. pigment White 6), zinc White (c.i. pigment White 4), iron manganese Black (c.i. pigment Black 26), and the like.

Alternatively, the sulfide may include zinc sulfide (c.i. pigment) or lithopone (c.i. pigment White 5), and the like.

Alternatively, the carbon and carbonate may include lead White (c.i. pigment White 1), carbon black (c.i. pigment black 7), calcium carbonate (c.i. pigment White 18), or the like.

Alternatively, the chromium-based pigment may include chrome Yellow (c.i. pigment Yellow 34), molybdenum chrome red (c.i. pigment red 104), chrome Green (c.i. pigment Green 17), or the like.

Alternatively, the iron oxide pigment may include iron Yellow (c.i. pigment Yellow 42), zinc iron Yellow (c.i. pigment Yellow 119), iron Red (c.i. pigment Red 101), iron Brown (c.i. pigment Brown 43), iron oxide Black (c.i. pigment Black 33), or the like.

Alternatively, the metal oxide may include titanium Yellow (c.i. pigment Yellow 53), cobalt blue (c.i. pigment blue 28), cobalt Green (c.i. pigment Green 26), or titanium Brown (c.i. pigment Brown 24), and the like.

Alternatively, the ultramarine pigment may include ultramarine Blue (c.i. pigment Blue29), ultramarine violet (c.i. pigment violet 15), or the like.

Alternatively, the bismuth vanadate may include bismuth Yellow (c.i. pigment Yellow 184) or the like.

Alternatively, the dispersant may include at least one of polyethylene wax, a hyperdispersant, and a fine powder, for example.

In the present application, the tinting strength of the colorant pre-dispersion may be 100-104%.

In summary, the colorant pre-dispersion provided by the present application can increase the concentration of the inorganic pigment to 41-80 wt%, and simultaneously, the polymer material, such as the polyolefin resin, is used as the main carrier, so that the coloring strength and the dispersibility of the colorant pre-dispersion can be improved under the condition of reducing the content of low molecular wax in the prior art or not adding the wax, and meanwhile, the colorant pre-dispersion is convenient to store and has high stability.

In addition, the application also provides a preparation method of the colorant pre-dispersion, which comprises the following steps: heating and mixing the components of the colorant pre-dispersion, and then extruding and molding.

Compared with the existing method of extruding the raw materials after cold mixing, the method can improve the dispersibility of the inorganic pigment by a heating and mixing mode, thereby preparing the monochromatic inorganic master batch with high inorganic pigment concentration and good dispersibility.

Specifically, the heating and mixing can be carried out by continuously mixing the components at 50-100 deg.C (such as 50 deg.C, 55 deg.C, 60 deg.C, 65 deg.C, 70 deg.C, 75 deg.C, 80 deg.C, 85 deg.C, 90 deg.C, 95 deg.C or 100 deg.C) for 10-30min (such as 10min, 15min, 20min, 25min or 30 min).

The raw material components are mixed by heating and mixing, so that at least part of the polyolefin resin and the dispersing agent are in a molten state, a uniform system is formed by the polyolefin resin and the dispersing agent and the inorganic pigment, and the dispersibility of the inorganic pigment is improved. The inorganic pigment is heated and mixed at the temperature and the time, so that the inorganic pigment has good dispersibility, and the better mechanical property of the material is kept. Continuously mixing the raw materials, namely simultaneously and continuously metering the components of the raw materials, mixing the components into a material flow containing various components according to a proportion, and continuously mixing the material flow into a uniform material flow after the material flow enters a continuous mixer. The mode is easy to be connected with subsequent continuous operation procedures such as crushing, granulating and the like, and frequent operation is not needed during production.

Alternatively, the extrusion molding is single screw extrusion or twin screw extrusion. Preferably in a twin screw extruder, more preferably the twin screw extruder is provided with a vacuum degassing device. Through setting up vacuum degassing unit, can in time carry out exhaust-gas treatment at the extrusion in-process, avoid behind high temperature heating water evaporation nevertheless can make the material moist in the extruder after can not effectively discharging, the gathering of agglomerating easily to reduce the dispersibility of material.

In some embodiments, the extruder each zone temperature and the die temperature are from 90 to 200 ℃.

In some embodiments, an extruder with seven zones is used for extrusion, and the temperatures of the first zone to the seventh zone are 60-140 ℃, 90-160 ℃, 130-.

In some embodiments, the screw speed during extrusion is 400-600rpm, 400rpm, 500rpm, 600rpm, or the like.

In some embodiments, the heated and mixed material is cooled, crushed and then extruded to improve the granulation effect.

In some embodiments, the method further comprises pelletizing and separating the shaped material. Alternatively, the pellets may be cut by hot-cutting at the head or underwater cutting. Optionally, the pelletized material may be conveyed by a blower to a separator for separation. Preferably, the number of separations is at least 2, with different numbers of separations corresponding to different separators. It should be noted that, the remaining process steps not referred to in the present application may refer to the prior art, and are not described herein in detail.

In addition, the application also provides application of the colorant pre-dispersion in color masterbatch and corresponding color masterbatch. The method can be used for preparing the color master, can reduce the color master cost, and has the advantages of no dust in the color master production process, high processing efficiency and good color difference control rate. It is worth mentioning that the color master batch can be further used for preparing plastics, thereby being beneficial to reducing the secondary processing amount and the oxidation risk of the plastics.

The features and properties of the present invention are described in further detail below with reference to examples.