GB/T 7044-2022 Colored carbon black
1 Scope
This document specifies the classification, naming, characteristic requirements, sampling, test methods, inspection and judgment rules, packaging, marking and storage of pigment carbon black
And transportation.
This document is applicable to pigment carbon black used in printing ink, paint, plastic, leather chemical industry, etc.
2 Normative References
The contents in the following documents, through normative references, constitute indispensable provisions of this document. Where, for dated references, only the version corresponding to that date applies to this document; For undated references, the latest version (including all amendments) applies
This document.
GB/T 3780.2 Carbon Black Part 2: Determination of Oil Absorption Value
GB/T 3780.6 Carbon Black Part 6: Determination of Coloring Strength
GB/T 3780.7 Carbon Black Part 7: Determination of pH
GB/T 3780.8 Carbon Black Part 8: Determination of Heat Loss
GB/T 3780.10 Carbon Black Part 10: Determination of Ash
GB/T 3780.12 Carbon Black Part 12: Inspection of Impurities
GB/T 3780.21 Carbon Black Part 21: Determination of Sieve Residue Water Washing Method
GB/T 3780.28 Carbon Black Part 28: Determination of Polycyclic Aromatic Hydrocarbon Content
GB/T 7047 Pigment Carbon Black Determination of Volatile Content
GB/T 7048 Colour carbon black Determination of blackness
GB/T 7052 Colored carbon black Determination of fluidity
GB/T 10722 Carbon Black Determination of Total Surface Area and External Area Nitrogen Adsorption Method
GB/T 29612 Determination of Cadmium, Lead and Mercury in Carbon Black
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Polycyclic aromatic hydrocarbons; PAHs
Hydrocarbons with two or more benzene rings in their molecules.
Note: According to the connection mode of benzene ring, polycyclic aromatic hydrocarbons can be divided into three categories: polyphenyl aliphatic hydrocarbons, biphenyls and condensed polycyclic aromatic hydrocarbons.
3.2
Heavy metal
Density at 4.5 g/cm 3 More than metal.
Note: such as copper, lead, zinc, tin, nickel, cobalt, antimony, mercury, cadmium and bismuth.
GB/T 7044—2022
4 Classification and naming
4.1 Classification
The pigment carbon black is divided into the following three categories according to the particle size and blackness, as shown in Table 1.
Table 1 Classification of pigment carbon black
classification Blackness 粒徑/nm
HCC(HCF) ≤22 9~17
MCC(MCF) 23~30 18~25
RCC(RCF) ≥31 26~37
Note 1: HCC is the abbreviation of High Colour Channel.
Note 2: HCF is the abbreviation of High Colour Furnace.
Note 3: MCC is the abbreviation of Medium Colour Channel.
Note 4: MCF is the abbreviation of Medium Colour Furnace.
Note 5: RCC is the abbreviation of Regular Colour Channel.
Note 6: RCF is the abbreviation of Regular Colour Furnace.
4.2 Naming
The name of the pigment carbon black variety is indicated by a four digit symbol. The first digit is the English letter, representing the production process, "C" representing the contact process (channel), and "F" representing the furnace process; The second digit refers to the category of pigment carbon black, "1" refers to high pigment, "3" refers to medium pigment, and "6" refers to common pigment; The third digit is a number indicating post-treatment, 1 indicates that the carbon black has not been post-treated, and 2 indicates that the carbon black has been post-treated; The fourth digit is a number indicating the structure of the pigment carbon black, in which 1 indicates that the oil absorption value is greater than 100 × 10-5m 3/ Kg, 5 means the oil absorption value is less than or equal to 100 × 10-5m 3/ kg。
Example: C121 refers to high pigment carbon black with high structure after treatment by contact method
C 1 2 1
Indicates high structure
——It means post-processing
-High pigment means contact method
5 Characteristic requirements
5.1 All products shall be free of impurities.
5.2 The characteristic indexes of each variety shall meet the requirements of Table 2.
5.3 45 μ M Sieve residue ≤ 300 mg/kg.
5.4 Total content of polycyclic aromatic hydrocarbons ≤ 80 mg/kg.
5.5 Total content of heavy metals ≤ 20 mg/kg.
GB/T 7044—2022
Table 2 Characteristic indexes of pigment carbon black
