GB/T 4612-2008 English PDFUS$154.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 4612-2008: Plastics -- Epoxy compounds -- Determination of epoxy equivalent Status: Valid GB/T 4612: Historical versions
Basic dataStandard ID: GB/T 4612-2008 (GB/T4612-2008)Description (Translated English): Plastics -- Epoxy compounds -- Determination of epoxy equivalent Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G32 Classification of International Standard: 83.080 Word Count Estimation: 8,885 Date of Issue: 2008-08-04 Date of Implementation: 2009-04-01 Older Standard (superseded by this standard): GB/T 4612-1984 Adopted Standard: ISO 3001-1999, IDT Regulation (derived from): National Standard Approval Announcement 2008 No.14 (Total No.127) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the determination of all the epoxy compound epoxy equivalent method. For epoxy-amine, the need to use correction method specified in Appendix A. GB/T 4612-2008: Plastics -- Epoxy compounds -- Determination of epoxy equivalent---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Plastics. Epoxy compounds. Determination of epoxy equivalent ICS 83.080 G32 National Standards of People's Republic of China GB/T 4612-2008/ISO 3001.1999 Replacing GB/T 4612-1984 Plastics - Determination of epoxy equivalent of the epoxy compound (ISO 3001.1999, IDT) Posted 2008-08-04 2009-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard is identical with ISO 3001.1999 "Plastics --- --- epoxy compounds epoxy equivalent determination" (in English). For ease of use, this standard made the following editorial changes. a) to the "international standards" be replaced by "this standard"; b) Delete the ISO 3001.1999 Foreword; c) increasing the preface of this standard; d) the use of symbols instead of a decimal point in the decimal symbol of international standards ",". ","; e) to the International Standard "(m1/m1)" to "quality score." f) increase the informative appendix NA, included in Chapter 8 of the precision of the content. This standard replaces GB/T 4612-1984 "Determination of epoxy equivalent epoxy compounds." This standard and GB/T 4612-1984 compared to the main changes are as follows. --- Increasing the definition of an epoxy index; --- Units from the "mole" to "mole"; --- Provisions of the acetic anhydride purity > 96%; --- Preparation of the standard perchloric acid in glacial acetic acid was added to the 300mL and 500mL acetic anhydride by the 20mL to 30mL; --- Perchlorate standard solution by the addition of glacial acetic acid 50mL to 20mL, also joined 10mL of chloroform; --- Increase the results of rounding; --- Increasing the blank test; --- Instrument increases the titrator; --- Weighed accurately to 0.2mg to 0.1mg; --- Increased under a high molecular weight, the amount of chloroform to 30mL; --- Increase the informative appendix. Appendix A of this standard is a normative appendix, Appendix NA informative appendices. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of plastic (SAC/TC15) centralized. This standard is drafted by. National Quality Supervision and Inspection Center of synthetic resin. Participated in the drafting of this standard. Bluestar New Chemical Materials Co., Ltd. Wuxi Resin Factory, Anhui Hengyuan Chemical Co., Ltd. The main drafters of this standard. Wang Yan, Wang Yonggui, Zhuju Fen, Cheng Zhen Shuo. This standard replaces the standards previously issued as follows. --- GB/T 4612-1984. GB/T 4612-2008/ISO 3001.1999 Plastics - Determination of epoxy equivalent of the epoxy compound1 ScopeThis standard specifies all epoxy compounds epoxy equivalent determination. For epoxy-amine, the need to amend the provisions of Appendix A method.2 Terms and definitionsThe following terms and definitions apply to this standard. 2.1 EE A resin containing a mass of moles of epoxy groups. 2.2 EI 1kg number of moles of the epoxy group-containing resin. Principle 3 0.1mol/L standard solution of perchloric acid with nascent hydrogen bromide and tetraethylammonium bromide specimen formed by the reaction of the epoxy groups in the reaction, Crystal violet indicator or potentiometric titration method to determine the end point.4 ReagentsUnless otherwise specified, the reagents used were of analytical grade. 4.1 glacial acetic acid. 4.2 of acetic anhydride, purity > 96%. 4.3 chloroform. 4.4 potassium hydrogen phthalate. 4.5 crystal violet indicator solution. 100mg crystal violet dissolved in 100mL of glacial acetic acid (4.1) in. 4.6 perchloric acid, 0.1mol/L of standard solution. 4.6.1 Preparation The 8.5mL mass fraction of 70% perchloric acid solution was added by a 500mL glacial acetic acid (4.1) and 30mL acetic anhydride (4.2) group Into a mixed solution diluted to 1000mL with glacial acetic acid and mix well. 4.6.2 Calibration 200mg potassium hydrogen phthalate (4.4) (if necessary, dried at 120 ℃ 2h) was dissolved in 20mL glacial acetic acid (4.1) and 10mL Chloroform mixture, with crystal violet indicator solution (4.5) or potentiometric titration (5.1) of the calibration solution. 4 to 6 drops with drops of crystal violet solution endpoint determination, titrated to a stable green, or potentiometric titrator performs the same operation Make. If measured by potentiometric titration method epoxy equivalent, apply the same method of calibration perchlorate. Record titration standard solution temperature NOTE. Recommended use of safety goggles and safety nets. GB/T 4612-2008/ISO 3001.1999 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 4612-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 4612-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 4612-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 4612-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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