CN110804298A - Color master batch for polycarbonate and preparation method thereof - Google Patents
Color master batch for polycarbonate and preparation method thereof Download PDFInfo
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- CN110804298A CN110804298A CN201911165924.6A CN201911165924A CN110804298A CN 110804298 A CN110804298 A CN 110804298A CN 201911165924 A CN201911165924 A CN 201911165924A CN 110804298 A CN110804298 A CN 110804298A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
- C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
- C08G64/08—Aromatic polycarbonates not containing aliphatic unsaturation containing atoms other than carbon, hydrogen or oxygen
- C08G64/083—Aromatic polycarbonates not containing aliphatic unsaturation containing atoms other than carbon, hydrogen or oxygen containing phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
- C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
- C08G64/08—Aromatic polycarbonates not containing aliphatic unsaturation containing atoms other than carbon, hydrogen or oxygen
- C08G64/12—Aromatic polycarbonates not containing aliphatic unsaturation containing atoms other than carbon, hydrogen or oxygen containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/30—General preparatory processes using carbonates
- C08G64/307—General preparatory processes using carbonates and phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0041—Optical brightening agents, organic pigments
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3472—Five-membered rings
- C08K5/3475—Five-membered rings condensed with carbocyclic rings
Abstract
The invention relates to the field of polycarbonate, in particular to a color master batch for polycarbonate and a preparation method thereof. The master batch comprises the following components: 40-46 parts of colorant, 50-56 parts of carrier resin and 3-5 parts of additive. When the polycarbonate color master batch provided by the invention is applied to coloring of polycarbonate products, the polycarbonate color master batch has the advantages of high color stability, uniform coloring, convenience in color change and convenience in transportation, and does not influence the mechanical properties of polycarbonate.
Description
Technical Field
The invention relates to the field of polycarbonate, in particular to a color master batch for polycarbonate and a preparation method thereof.
Background
Polycarbonate is a heat-shrinkable engineering plastic with excellent comprehensive properties, has high impact resistance, high toughness, high heat resistance, weather resistance and excellent electrical insulation, and is widely applied to the fields of automobile industry, instruments, electronic and electric appliances and the like.
In order to make polycarbonate capable of having color, it needs to be dyed, and engineering plastic dyeing is different from chemical fibers and natural fibers, and color master batches are used for dyeing. The color master batch is a plastic colorant which is well dispersed by a pigment or an additive with a high proportion and a thermoplastic resin. In the prior art, the performance of master batches is affected by directly adding a colorant into polycarbonate, and the color is not uniform.
Meanwhile, the polycarbonate has certain flame retardance, but cannot meet the situation that the requirement on the flame retardance grade is higher, and the color master batch for the polycarbonate, which meets the requirement, and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a color master batch for polycarbonate and a preparation method thereof.
The above purpose of the invention is realized by the following technical scheme:
the color master batch for polycarbonate comprises the following components, by weight, 40-46 parts of a colorant, 50-56 parts of a carrier resin and 3-5 parts of an additive.
Further, the additive comprises 1-2 parts by weight of light stabilizer, 0.5-1 part by weight of dispersant and 1-2 parts by weight of ultraviolet absorber.
Preferably, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol.
Preferably, the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber.
Preferably, the dispersant is one or more of polyethylene wax, oxidized polyethylene wax, polypropylene wax, a-methyl styrene resin, stearic acid, and polyester wax, and preferably the dispersant is polyester wax.
Preferably, the carrier resin is polycarbonate or modified polycarbonate. The modified polycarbonate is halogen-free flame-retardant copolymerized polycarbonate modified by an organic phosphorus-nitrogen flame retardant, and the organic phosphorus-nitrogen flame retardant is 6- ((4- ((2-hydroxy) amino) phenyl) 4-hydroxyphenyl) methyl) dibenzo- [1,2] -oxyphosphazene-6-oxide. The preparation method of the halogen-free flame-retardant copolymerized polycarbonate comprises the following steps:
(a) under the protection atmosphere of inert gas, firstly placing diphenyl carbonate (DPC) in a reaction kettle, heating to melt the DPC, then uniformly dispersing the halogen-free flame retardant in the melted DPC, uniformly stirring, then adding bisphenol A (BPA) and a catalyst, and reacting for 2-4h at the temperature of 170-220 ℃ to prepare a prepolymer;
(b) raising the temperature of the prepolymer prepared in the step (a) to 230-260 ℃, and stirring for continuous reaction for 0.5-2h to obtain the halogen-free flame-retardant copolymerized polycarbonate.
The halogen-free flame-retardant copolymerized polycarbonate prepared by the method introduces a flame retardant into a polycarbonate main chain, belongs to block copolymerization and ensures the consistency and uniformity of products.
Preferably, the colorant is an organic pigment.
Specifically, the invention also provides a preparation method of the color master batch for preparing the polycarbonate, which comprises the following steps:
(1) firstly, grinding and crushing the colorant to ensure that the particle size is less than 1.5 mu m;
(2) then mixing and stirring the additive and the treated colorant according to a proportion to obtain color paste, and then putting the polycarbonate into a mixing roll for mixing treatment;
(3) and (3) transferring the mixed material in the step (2) into a double-screw extruder, carrying out melt mixing under the protection of nitrogen, and carrying out extrusion granulation to obtain the color master batch for polycarbonate.
Preferably, the mixing treatment temperature is 180-190 ℃, and the mixing time is 30min-60 min.
Preferably, the extrusion granulation temperature is 220-235 ℃.
Compared with the prior art, the color master batch for polycarbonate has the following advantages:
(1) the color master batch for the polycarbonate prepared by the invention does not introduce other resins, has no influence on the mechanical properties of the polycarbonate and the like, and keeps better mechanical properties.
(2) The color master batch for polycarbonate prepared by the invention has the advantages of uniform colorant dispersion, convenient dyeing, uniform color and high color yield.
(3) The color master batch for polycarbonate prepared by the invention has excellent flame retardance and wear resistance, improves the original impact resistance and tensile property, and has high light stability.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
The experimental procedures in the following examples are conventional unless otherwise specified.
The test materials used in the following examples were purchased from a conventional reagent store unless otherwise specified.
The following description is made with reference to specific embodiments:
example one
50 parts of polycarbonate, 45 parts of organic pigment, 1 part of dispersing agent, 2 parts of light stabilizer and 2 parts of ultraviolet absorber, wherein the dispersing agent is stearic acid, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, and the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu M, mixing and stirring 1 part of dispersing agent and 45 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 2 parts of light stabilizer, 2 parts of ultraviolet absorbent and 50 parts of polycarbonate carrier resin into a mixing roll, mixing for 30min at 185 ℃, transferring the mixed material into a double-screw extruder, carrying out melt mixing at 230 ℃ under the protection of nitrogen, and carrying out extrusion granulation by using the double-screw extruder to obtain the color master batch for polycarbonate, namely M1.
Example two
56 parts of polycarbonate, 40 parts of organic pigment, 0.5 part of dispersing agent, 1.5 parts of light stabilizer and 2 parts of ultraviolet absorber, wherein the dispersing agent is polyethylene wax, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, and the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu M, mixing and stirring 0.5 part of dispersing agent and 40 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 1.5 parts of light stabilizer, 2 parts of ultraviolet absorbent and 56 parts of polycarbonate carrier resin into a mixing roll, mixing for 60min at 190 ℃, transferring the mixed material into a double-screw extruder, carrying out melt mixing at 235 ℃ under the protection of nitrogen, and carrying out extrusion granulation by using the double-screw extruder to obtain the color master batch for polycarbonate, namely M2.
EXAMPLE III
51 parts of polycarbonate, 46 parts of organic pigment, 0.8 part of dispersing agent, 1.2 parts of light stabilizer and 1 part of ultraviolet absorber, wherein the dispersing agent is oxidized polyethylene wax and polypropylene wax, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, and the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu M, mixing and stirring 0.8 part of dispersing agent and 46 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 1.2 parts of light stabilizer, 1 part of ultraviolet absorbent and 51 parts of polycarbonate carrier resin into a mixing roll, mixing for 45min at 185 ℃, transferring the mixed material into a double-screw extruder, melting and mixing at 220 ℃ under the protection of nitrogen, and extruding and granulating by using the double-screw extruder to obtain the color master batch for polycarbonate, namely M3.
Example four
55 parts of polycarbonate, 41 parts of organic pigment, 1 part of dispersing agent, 1.6 parts of light stabilizer and 1.4 parts of ultraviolet absorber, wherein the dispersing agent is alpha-methyl styrene resin, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, and the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu M, mixing and stirring 1 part of dispersing agent and 41 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 1.6 parts of light stabilizer, 1.4 parts of ultraviolet absorbent and 55 parts of polycarbonate carrier resin into a mixing roll, mixing for 50min at 180 ℃, transferring the mixed material into a double-screw extruder, carrying out melt mixing at 225 ℃ under the protection of nitrogen, and carrying out extrusion granulation by using the double-screw extruder to obtain the color master batch for polycarbonate, namely M4.
EXAMPLE five
50 parts of modified polycarbonate, 45 parts of organic pigment, 1 part of dispersing agent, 2 parts of light stabilizer and 2 parts of ultraviolet absorber, wherein the dispersing agent is polyester wax, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, and the ultraviolet absorber is a hydroxybenzotriazole type ultraviolet absorber. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu M, mixing and stirring 1 part of dispersing agent and 45 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 2 parts of light stabilizer, 2 parts of ultraviolet absorbent and 50 parts of modified polycarbonate carrier resin into a mixing roll, mixing for 30min at 185 ℃, transferring the mixed material into a double-screw extruder, carrying out melt mixing at 230 ℃ under the protection of nitrogen, and carrying out extrusion granulation by using the double-screw extruder to obtain the color master batch for polycarbonate, namely M5.
The modified polycarbonate is halogen-free flame-retardant copolymerized polycarbonate modified by an organic phosphorus-nitrogen flame retardant, and the organic phosphorus-nitrogen flame retardant is 6- ((4- ((2-hydroxy) amino) phenyl) 4-hydroxyphenyl) methyl) dibenzo- [1,2] -oxyphosphazene-6-oxide.
The preparation method comprises the following steps: (a) diphenyl carbonate (A) firstDPC) is placed in a reaction kettle with nitrogen protection device, heated to melt, and then added with 6- ((4- ((2-hydroxy) amino) phenyl) 4-hydroxyphenyl) methyl) dibenzo- [1,2]Mixing (by mol ratio n (DPC) n (BPA) n (halogen-free flame retardant) 1.08:0.88:0.12) with (oxy) phosphazene-6-oxide halogen-free flame retardant and bisphenol A (BPA), stirring uniformly, and adding [ Bmin [, bisphenol A (BPA) ], DPC, BPA and halogen-free flame retardant]OH catalyst, the molar ratio of catalyst to BPA is 1: (3X 10)-4) Melting and mixing materials, adding the materials into a reaction kettle provided with a temperature controller, a stirrer and a nitrogen protection device, adjusting the stirring speed of the stirrer to 700r/min, and reacting for 3 hours at the temperature of 210 ℃; (b) and adjusting the temperature to 250 ℃, adjusting the stirring speed to 500r/min, and reacting for 1.5h to obtain the halogen-free flame-retardant copolymerized polycarbonate.
Comparative example 1
Putting polycarbonate carrier resin into a mixing roll, mixing for 30min at 185 ℃, then transferring the materials into a double-screw extruder, melting and mixing at 230 ℃ under the protection of nitrogen, and extruding and granulating by the double-screw extruder to obtain the polycarbonate master batch, namely N1.
Comparative example No. two
50 parts of polycarbonate carrier resin and a colorant are put into a mixing roll together, mixing treatment is carried out for 30min at 185 ℃, then the materials are transferred into a double-screw extruder, melted and mixed at 230 ℃ under the protection of nitrogen, and extruded and granulated by the double-screw extruder to obtain the polycarbonate master batch, namely N2.
Comparative example No. three
49.5 parts of polycarbonate, 0.5 part of organic phosphorus nitrogen flame retardant, 45 parts of organic pigment, 1 part of dispersant, 2 parts of light stabilizer and 2 parts of ultraviolet absorbent, wherein the dispersant is stearic acid, the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol, the ultraviolet absorbent is a hydroxybenzotriazole type ultraviolet absorbent, and the organic phosphorus nitrogen flame retardant is 6- ((4- ((2-hydroxy) amino) phenyl) 4-hydroxyphenyl) methyl) dibenzo- [1,2] -oxyphosphazene-6-oxide. The preparation method comprises the following steps: grinding and crushing the organic pigment to enable the particle size of the organic pigment to be less than 1.5 mu m, mixing and stirring 1 part of dispersing agent and 45 parts of treated pigment according to the proportion to obtain color paste, putting the color paste, 2 parts of light stabilizer, 2 parts of ultraviolet absorbent, 0.5 part of organic phosphorus-nitrogen flame retardant and 49.5 parts of modified polycarbonate carrier resin into a mixing roll, mixing for 30min at 185 ℃, transferring the mixed material into a double-screw extruder, carrying out melt mixing at 230 ℃ under the protection of nitrogen, and carrying out extrusion granulation by using the double-screw extruder to obtain the color master batch for polycarbonate, namely N3.
Experimental example 1
1. And (3) measuring mechanical properties: the master batches obtained in examples 1 to 5 and comparative examples 1 to 3 were dried at 120 ℃ for 4 hours, injection-molded into plaques having a length of 90 × 80 × 3mm, and the tensile strength and impact strength were measured.
2. Determination of flame-retardant rating: the master batches prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to a vertical burning test in accordance with GB/T2408-2008, and the burning behavior of the vertically placed material after being subjected to an external flame was measured. And judging the flame retardant grade of the material.
The results of the property measurements of the test samples are shown in table 1 below:
TABLE 1 measurement results of Properties
| Sample (I) | Tensile Strength (MPa) | Impact Strength (J/m) | Flame retardant rating |
| Example 1 | 63.8 | 771 | V1 |
| Example 2 | 63.4 | 766 | V1 |
| Example 3 | 63.6 | 759 | V1 |
| Example 4 | 64.3 | 762 | V1 |
| Example 5 | 64.3 | 772 | V0 |
| Comparative example 1 | 63.2 | 766 | V1 |
| Comparative example 2 | 60.5 | 721 | V1 |
| Comparative example 3 | 62.8 | 750 | V0 |
As can be seen from the data in the table above, the color master batch prepared by the invention does not affect the tensile strength and impact strength of the polycarbonate after being dyed. The color master batch for polycarbonate is prepared by adding the colorant, and has the advantages of convenient dyeing, uniform color and high color yield. In addition, the color master batches prepared in examples 1-5 of the invention are not easy to yellow under the same ultraviolet irradiation, while the color master batches prepared in comparative examples 1-2 are easy to yellow. Therefore, the color master batch for polycarbonate prepared by the invention has good light stability and flame retardant property, can be widely applied to preparation of polycarbonate materials, and has wide application prospect.
Of course, other ratios of the raw material components, conditions and parameters in the production process, and the like are also possible except for those exemplified in the examples.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A color master batch for polycarbonate is characterized in that: the master batch comprises the following components: 40-46 parts of colorant, 50-56 parts of carrier resin and 3-5 parts of additive.
2. The color masterbatch for polycarbonate according to claim 1, wherein: the additive comprises 1-2 parts by weight of light stabilizer, 0.5-1 part by weight of dispersant and 1-2 parts by weight of ultraviolet absorber.
3. The color masterbatch for polycarbonate according to claim 2, wherein: the light stabilizer is a light stabilizer compounded by hindered amine and hindered phenol.
4. The color masterbatch for polycarbonate according to claim 2, wherein: the ultraviolet absorbent is a hydroxybenzotriazole type ultraviolet absorbent.
5. The color masterbatch for polycarbonate according to claim 2, wherein: the dispersing agent is one or more of polyethylene wax, oxidized polyethylene wax, polypropylene wax, a-methyl styrene resin, stearic acid and polyester wax, and preferably, the dispersing agent is polyester wax.
6. The color masterbatch for polycarbonate according to claim 1, wherein: the carrier resin is polycarbonate or modified polycarbonate.
7. The color masterbatch for polycarbonate according to claim 1, wherein: the colorant is an organic pigment.
8. A process for preparing a color masterbatch for polycarbonate according to claim 1, wherein: the preparation method comprises the following steps:
(1) firstly, grinding and crushing the colorant to ensure that the particle size is less than 1.5 mu m;
(2) then mixing and stirring the additive and the treated colorant according to a proportion to obtain color paste, and then putting the polycarbonate into a mixing roll for mixing treatment;
(3) and (3) transferring the mixed material in the step (2) into a double-screw extruder, carrying out melt mixing under the protection of nitrogen, and carrying out extrusion granulation to obtain the color master batch for polycarbonate.
9. The process for producing a color masterbatch for polycarbonate according to claim 8, wherein: the mixing treatment temperature is 180-190 ℃, and the mixing time is 30-60 min.
10. The process for producing a color masterbatch for polycarbonate according to claim 8, wherein: the extrusion granulation temperature is 220-235 ℃.
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