Part of Inorganic Pigments Product standards and technical differences at home and abroad
Standardization of the status quo of Chinas pigment
1.1 The basic situation
Landmark Commission since its establishment, through the joint efforts of workers to paint the field of standardization, pigments standardization has made remarkable progress. At present, paint and pigments by the National Standardization Technical Committee of the centralized management standards for a total of 62 pigments, one of 45 national standards, industry-standard 17. Include applicable to the field of basic paints, pigments and other products and test method standards. These standards constitute the existing national and industry-standard paint system, and in guiding the production, improve product quality, promoting trade and promoting the use and development of products and so has played an important role.
National Paint and paint pigments branch of Standardization Technical Committee (TC5/SC8) pigments are standard centralized management departments. Paint the area is mainly responsible for the standardization of the technical focal point of work, the main mission organized pigment formulation and revision of standards; as technical support with the countries to develop standardized guidelines and policies; in accordance with the development of the industry organization set up in this area of standardization system table; to standard periodic review to confirm; take part in international standardization activities pigment of paint made with international standards, tracking and analysis of research; standards Publicizing training; standard samples, such as the development release.
Currently, Chinas paint standards to adopt international standards adopting the rate of about 59%, adopting higher levels of most of the standard test method. Counterparts of international standards for the conversion rate of 46 percent, failed to translate into Chinas standards are some of the major physical fitness standards, as well as pigment dispersion and dispersion method of assessing the methodological standards.
1.2 domestic paint pigment standard system with the international standard system (ISO) Comparison
Country and industry-standard paint system and compared to both ISO also has its uniqueness in common. Mainly by the international standard system test methods and product standards pose. Country and industry standard system contain test methods and product standards also include the classification of the area involved in pigment named, sampling and other basic standards, one of paint test method used in most of the corresponding international standard method.
Paint the area of country and industry standards in addition to basic standards (5) The total of 57, one of 34 standard test methods, product standards 23, mainly by the inorganic pigments and organic pigments constitute product standards. International standards for the 80, one of 42 standard test method (currently most have been translated into national standards, one of nine test method has been transformed into the standard paint standard system), Product Standards 38, from inorganic pigments and pigment physique standards of composition, has one of the standard physical pigments 22.
Organic Pigment Product standard no corresponding international standards, so the adoption of organic pigments subscript or blank. Although international standards of inorganic pigments can be used, but because of the main characteristics of pigments embodied two indicators - the color and shading, and in the international standards are agreed, therefore, usually before the standards set in accordance with the domestic habits of the actual level in accordance with domestic selected samples, this approach is also with the international common practice has certain differences, in recent years standards have been developed pigment gradually reverse this practice and keep in line with international standards, such as in 2003 submitted for approval to complete the titanium dioxide standards, completed in 2004 chrome green standards for approval.
Part 2 of the Inorganic Pigments product standards the situation at home and abroad
2.1 Titanium Dioxide Pigments
Existing national standards: GB 1706-1993 titanium dioxide pigments
The current version of international standards: ISO 591-1: 2000 Paints with titanium dioxide pigments - Part 1: Specification and test methods
To be released national standards: GB / T 1706 -×××× titanium dioxide pigments
The current national standard GB 1706-1993 titanium dioxide pigment has been amended, completed in 2003 submitted for approval and is now in pending stage. New standards (to be published National Standards) amendments seek to adopt the international standard ISO591-1: 2000, Project Settings and technology are entirely in line with international standards. Because the standard does not involve personal health and safety, do not involve the issue of environmental protection, so the property be changed from mandatory recommend sexual.
2.1.1 the new standard with the previous version of GB 1706 - 1993 compared to the major revisions are as follows:
1) Use of international standards version. Amendments seek to adopt the new standard ISO591-1: 2000, GB 1706 - 1993 with reference to the use of ISO 591: 1977;
2) Standard property. The standards recommend sex, GB 1706 - 1993 for the mandatory;
3) Product categories. New standards for two kinds of product sub-type (anatase and rutile) 5 species (A1, A2, R1, R2 and R3), fully consistent with international standards; GB 1706 - 1993 separated two kinds of types (anatase and rutile) 3 species (BA01-01, BA01-02 and BA01-03), each species was divided into three grades (qualified products, superior first-class goods and goods);
4) samples. The new standard used in the reference samples agreed, GB 1706 - 1993 Medium samples using selected criteria;
5) color, scattering power method. Determination of the new standard in color retention of the GB 1706 - 1993 Medium extrajudicial increased visual equipment Act (GB / T 5211.20 - 1999), Determination of scattering instruments instead of the original edge standard achromatic visual determination of force;
6) Technical Specifications. Products to meet the requirements of different uses, some properties such as absorption capacity, water suspension pH value changed to the agreed project indicators.
2.1.2 with the new standard ISO 591-1: 2000 compared to Edit and apart from the standard format in accordance with China GB / T 1.1-2000 require appropriate changes were made, the technical content also made some modifications, the main revisions are as follows :
1) the new standard in TiO 2 content determination using only ISO 591-1:2000 Medium A method, delete the chromium chloride method B (Ⅱ) to restore the law;
2) The new standard is referenced in the use of international standards of our standards, rather than the international standards;
3) The new standard has been added to Chapter 8 test results to determine and Chapter 9 logo, packaging, transport and storage.
The release of new standards and implementation will be resolved over the years the original titanium dioxide pigments standards that exist in a number of questions (such as the standard property inappropriate, the standard low level of the limitations of standard sample, as well as such items as color test areas of large error problem) , Titanium Dioxide Products in China to enhance international competitiveness, and promote the international market of Titanium Dioxide Products has laid a good foundation.
2.2 Lead chrome yellow
The current national standard: GB / T 3184-1993 lead chrome yellow
The current version of international standards: ISO 3711:1990 Lead chromate pigments and molybdenum lead chromate pigments - Specifications and test methods
Japanese Industrial Standard: JIS K 5110: 2005 Lead chromate pigments and lead chromate pigments Mo
The current national standard GB / T 3184-1993 lead chrome yellow, the Department of non-equivalent use of international standards ISO 3711: 1990, and indicators in the project settings, color and shading test methods there are many problems, has been unable to adapt and meet the the needs of users should be the vast numbers of manufacturing enterprises and the user request, the Secretariat in May 2005 to the GB standards committee made recommendations to amend the report, the current applications are approved, being set up to amend the standards working group.
2.2.1 GB / T 3184-1993 and ISO 3711: 1990 compared to the main technical differences are:
1) scope of application. GB / T 3184-1993 not included in molybdenum lead chromate pigments, and because the standard does not control soluble lead content and clearly does not apply to food packaging and toys, ISO 3711: 1990, including lead chromate pigments and chromium molybdenum acid lead pigments;
2) Product classification and grading. GB / T 3184-1993 by five different color varieties, each species was divided into two grades, IS O3711: 1990 separated the two types [standard type (type 1) and stable angina (type 2)];
3) standard sample. GB / T 3184-1993 the adoption of standards selected sample, ISO 3711: 1990 in the agreed reference pigment;
4) Project Settings. Both were 13, GB / T 3184-1993 measured Lead Chromate content, ISO 3711: 1990 Determination of soluble lead content, and the remaining items (12) the same;
5) Technical Specifications. GB / T 3184-1993 in both the specific indicators, ISO 3711: 1990, in addition to 105 ℃ volatile, water-soluble material, water extract pH, aqueous suspension pH, Residue specific indicators, the remaining projects are agreed indicators or comparison with the agreed reference pigment;
6) Test Method. Determination of Residue - GB / T3184-1993 use of GB / T 1715-79, ISO 3711: 1990 used ISO 787 / 7 (ISO 787 / 7: 1981 has been converted to GB / T 5211.18-88); Determination of lightfastness - GB / T 3184-1993 the use of GB / T 1710, ISO 3711: 1990 used ISO 787/15; Determination of total lead content - GB / T 3184-1993, only the use of gravimetric method (that is, ISO 3711: 1990 Medium 6.1 gravimetric method), delete the ISO 3711: 1990 Medium 6.2 Titration, ISO3711: 1990 provides two methods (6.1 and 6.2 weight Titration).
2.2.2 JIS K 5110: 2005 and ISO 3711: 1990 compared to the main technical differences are:
1) Determination of total lead content using only Titration (ie ISO 3711:1990 in 6.2), delete the ISO 3711:1990 in the 6.1 weight method;
2) Determination of soluble lead content of only using AAS method (7.2.1A AS Law), delete the ISO 3711:1990 in 7.2.2 Dithizone Absorptiophotometry;
3) Product categories regarding paint color pigments to increase the international index.
To revise the national standard GB / T 3184-1993 the project has been officially launched, the main contents of the revised standards will include the following: improve the level of adopting; standard name changed to lead chromate pigments and lead chromate pigments Mo, the increase of molybdenum Lead Chromate Pigments requirements; increase in soluble lead content project; color and shading method force law be changed by the visual apparatus method; the abolition of the selected samples, such as country, as far as possible in line with international standards to meet the product development and export trade需要.
2.3 iron oxide pigments
Existing domestic standards:
GB / T 1863-1989 Iron Oxide Red Pigment
HG / T 2249-1991 iron oxide yellow pigment
HG / T 2250-1991 black iron oxide pigments
HG / T 3006-1986 micaceous iron oxide
The current version of international standards:
ISO 1248: 1974 Paints with iron oxide pigments
ISO 10601: 1993 Paints with micaceous iron oxide pigments
Other foreign standards:
ASTM D 768-2001 hydrated iron oxide yellow pigment
ASTM D 769-2001 synthetic iron oxide black pigments
ASTM D 3721-83 (1999) Synthesis of Iron Oxide Red Pigment
ASTM D 3722-82 (1999) Natural iron oxide red and iron oxide brown pigments
ASTM D 3724-2001 Synthesis of iron oxide brown pigments
ASTM D 5532-94 (1999) Paints with micaceous iron oxide pigments (2004, withdrawn)
GB / T 1863-1989, HG / T 2249-1991, HG / T 2250-1991 and ISO 1248: 1974 contrast, the above three criteria are used with reference to ISO 1248: 1974, three standard control projects and ISO 1248: 1974, provided for consistency, the main differences are as follows:
1) scope of application. ISO 1248: 1974 in the scope of application of paint used for all synthetic and natural iron oxide pigments, including micaceous iron oxide, the domestic standard, respectively, limit the scope;
2) Product categories. GB / T 1863-1989 Iron Oxide Red Pigment by the production process are classified into three types: mixed acid, sulfuric acid method and calcination method, two of each type of sub-grade (level materials, qualified product). HG / T 2249-1991 iron oxide yellow pigment and HG / T 2250-1991 black iron oxide pigments, two middle level (level materials, qualified product). ISO1248: 1974 Product of the following categories: grouping by color (red, yellow, brown, black, gray metallic luster), according to the iron content classification (A, B, C, D), by water-soluble materials and water-soluble salt content type (Ⅰ, Ⅱ, Ⅲ-type), according to Residue grading (1, 2, 3, etc.), by source level (a, b, c, d-class);
3) domestic standards are used in the country selected samples, IS O1248: 1974 used in the agreed reference pigment;
4) HG / T 2249-1991 iron oxide yellow pigment and HG / T 2250-1991 black iron oxide pigments in the sieve residue was determined by GB / T 1715, ISO 1248: 1974 Medium Residue Determination Methods ISO787 / 7.
Germany in 2003 proposed to amend the international standard ISO 1248: 1974 program of work, members of the Working Group due to take part in a small number of units without the project. Germany put forward draft proposals: ① the scope of change, does not include micaceous iron oxide, transparent iron oxide, iron oxide and magnetic properties of granular gray iron oxide pigments, pigment colors at the same time increase the color classification index; ② Determination of iron content to increase B Law (potentiometric titration); ③ Determination of total calcium increased by flame atomic absorption spectrometry; ④ appendix to deal with the determination to increase the iron content of mercury in waste water method.
ISO 10601: 1993 Paints with micaceous iron oxide pigments, in Control Project with the ISO 1248: 1974 in similar projects, an increase of thin-sheet method of assessing particle shape. Micaceous iron oxide pigments that are to be included in the ISO 1248: 1974s, and later developed a separate standard. At present, the international standards are being amended.
HG / T 3006-1986 and ISO 10601: 1993 as compared to the former standard control project has 7: iron content (Fe 2 O 3), 105 ℃ volatile, water-soluble material, sieve residue, water suspension pH, oil absorption the amount of silica content. The latter standard has 8 Control Project: iron content (Fe 2 O 3), 105 ℃ volatile, water-soluble material, sieve residue, water suspension pH, oil absorption capacity, the total钙量, thin flake-shaped particles assessed. Both control project has six are the same, the main differences: HG/T3006-1986 Determination of silica content, and ISO 10601: 1993 Determination of total钙量also increased by a thin sheet of the evaluation method of particle shape .
2.4 lithopone
The current national standard: GB / T 1707-1995 lithopone
The current version of international standards: ISO 473: 1982 Paints with lithopone pigment
GB / T 1707-1995 Department of the equivalent use of ISO 473: 1982, control of the project agreement between the two main technical differences are:
1) Product Categories. GB / T 1707-1995 Product only used ISO473: 1982 in 30% of the species, specific sub-four varieties (B301, B302, B311, B312), in each species was divided into three grades; ISO473: 1982 Product Medium divided into two category, 30% and 60%;
2) standard samples. GB / T 1707-1995 selected countries using standard, ISO 473: 1982 used in the agreed reference pigment;
3) GB / T 1707-1995 cited the use of international standards of Chinas standards, rather than international standards.
2.5 zinc oxide
The current national standard: GB / T 3185-1992 zinc oxide (indirect method); GB / T 3494-1996 direct method zinc oxide
International standards: None
USA ASTM D79-86 (1999) Zinc Oxide Pigments
Japanese Industrial Standard JIS K1410-1995 zinc oxide
GB / T 3185-1992 zinc oxide (indirect method) in reference to JIS K1410-1983 zinc oxide basis, an increase of some of the projects. GB / T 3185-1992 Medium Control Project has 13, as follows: ZnO, 105 ℃ volatiles, soluble material, oxidation of lead (Pb), sieve residue, metal objects (in total Zn), manganese oxide ( to Mn), and copper oxide (with Cu), and hydrochloric acid insoluble matter, burning reduction, oil absorption capacity, color, achromatic edge.
JIS K1410-1983 Medium Control Project has six, as follows: ZnO, moisture, water-soluble material, lead (Pb), Residue, cadmium (Cd).
GB/T3494-1996 Medium Control Project has 15, as follows: color, ZnO, moisture, water-soluble material, lead oxide, copper oxide, manganese, zinc, hydrochloric acid insoluble matter, burning reduction, sieve residue, oil absorption capacity, achromatic, and oxidation of cadmium, hiding power.
ASTM D79-86 (1999) Zinc Oxide Pigments Control Project has seven: zinc oxide content, sulfur content, moisture (volatile matter), total impurities [including water (volatile matter)], coarse particles (sieve residue), Oil absorption, shading power.