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GB/T 4618.2-2008: Plastics -- Epoxy resins -- Determination of chlorine content -- Part 2: Easily saponifiable chlorine
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| GB/T 4618.2-2008 | English | 134 |
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Plastics -- Epoxy resins -- Determination of chlorine content -- Part 2: Easily saponifiable chlorine
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GB/T 4618.2-2008
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Basic data | Standard ID | GB/T 4618.2-2008 (GB/T4618.2-2008) | | Description (Translated English) | Plastics -- Epoxy resins -- Determination of chlorine content -- Part 2: Easily saponifiable chlorine | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G32 | | Classification of International Standard | 83.080.10 | | Word Count Estimation | 7,754 | | Date of Issue | 2008-09-04 | | Date of Implementation | 2009-04-01 | | Older Standard (superseded by this standard) | GB/T 4618-1984 | | Adopted Standard | ISO 21627-2-2002, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008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 epoxy easily saponifiable chlorine. Easily saponifiable chlorine content in the epoxy resin to give a quantitative amount of easily saponifiable chlorine. Easy to get saponification value represents the concentration of chlorine compounds in the chlorinated alcohol. | GB/T 4618.2-2008: Plastics -- Epoxy resins -- Determination of chlorine content -- Part 2: Easily saponifiable chlorine
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.. Plastics Epoxy resins Determination of chlorine content Part 2. Easily saponifiable chlorine
ICS 83.080.10
G32
National Standards of People's Republic of China
GB/T 4618.2-2008/ISO 21627-2.2002
Replacing GB/T 4618-1984
Plastics - Determination of chlorine content epoxy resin
Part 2. Easily saponifiable chlorine
(ISO 21627-2.2002, IDT)
Posted 2008-09-04
2009-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 4618 "Plastics - Determination of chlorine content epoxy resin" is divided into three parts.
--- Part 1. Inorganic chlorine;
--- Part 2. Easily saponifiable chlorine;
--- Part 3. Total chlorine.
This section GB/T 4618 Part 2, identical with ISO 21627-2.2002 "Plastics --- --- chlorine content of an epoxy resin
Determination --- Part 2. Easily saponifiable chlorine "(in English).
This section is equivalent translation ISO 21627-2.2002, identical in technical content.
For ease of use, this section do the following Edit modifications.
a) The "this part of ISO 21627" to "GB/T 4618 this part" or "this part";
b) Delete the ISO 21627-2.2002 Foreword;
c) increase the foreword to the national standard of this Part;
d) For ISO 21627-2.2002 and other international standards referenced in our country is equivalent to using the standard, this section with a quote me
National Standards corresponding to international standards in place, the rest is not tantamount to the adoption of a standard international standards in this section are
Direct reference;
e) use of decimal notation. "" instead of the international standard decimal symbol "."
This Part replaces GB/T 4618-1984 "epoxy resins and related materials - Determination of easily saponifiable chlorine."
Section compared with GB/T 4618-1984 The main changes are as follows.
--- Change the standard name, increasing the foreword;
--- Increasing the normative references;
--- Increasing the terms and definitions;
--- Sodium hydroxide solution was divided into 2-butoxyethanol for epoxy resins used for testing in methanol and glycidyl testing;
--- Into concentration units by the N mol/L;
--- Reference reagent sodium sulfate into a temperature from 120 ℃ 500 ℃ ~ 600 ℃.
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Plastics Standardization Technical Committee (SAC/TC15) centralized.
This section is responsible for drafting. National Quality Supervision and Inspection Center of synthetic resin.
Participated in the drafting of this section. Bluestar New Chemical Materials Co., Ltd. Wuxi Resin Factory, Anhui Hengyuan Chemical Co., Ltd.
The main drafters of this section. Wangyong Gui Shen Jing Wen, Cheng Zhen Shuo.
This part of the standard replaces the previous editions are.
--- GB/T 4618-1984.
GB/T 4618.2-2008/ISO 21627-2.2002
Plastics - Determination of chlorine content epoxy resin
Part 2. Easily saponifiable chlorine
Warning --- using GB/T 4618 in this part of the staff should be familiar with general laboratory rules. This part not covered with the use of the
Any security issues, responsibility of the user to establish appropriate safety and health measures and compliance with relevant regulations.
1 Scope
GB/T 4618 This section specifies the method for measuring the epoxy resin easily saponifiable chlorine.
Easily saponifiable chlorine content in a given amount of epoxy resin easily saponifiable chlorine amount.
The resulting value represents the concentration of easily saponifiable chlorine compounds chlorinated alcohol group.
2 Normative references
The following documents contain provisions which, through reference to GB/T 4618 to the present, constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
Determination of GB/T 4618.1-2008 Plastics - Epoxy chlorine content - Part 1. Inorganic chlorine (ISO 21627-1.2002,
IDT)
ISO 3696. 1987 specifications and test methods of laboratory water analysis
3 Terms and Definitions
The following terms and definitions apply GB/T 4618 of this section.
3.1
Such as the presence of 1,2-chlorohydrin due to incomplete dehydrohalogenation to produce, so most of the chlorine content easily saponifiable chlorine formed in this way.
Principle 4
Epoxy resin (diglycidyl esters of external addition) a solution of 2-butoxyethanol at room temperature the reaction with sodium hydroxide. Epoxy (glycidyl
Ester oil) at 50 deg.] C the reaction with methanolic sodium hydroxide.
The mixture was acidified and silver nitrate standard solution Determination of chloride ion concentration by saponification generated by potentiometric titration. Inorganic samples
Chlorine correction, inorganic chlorine measurement method GB/T 4618.1-2008 requirements.
5 Reagents
Except as otherwise provided in this section, the purity of the reagents used should be more analytical, test water shall comply with ISO 3696. 1987 in three or
Above water specifications.
5.1 acetic acid.
5.2 2-butoxyethanol (EGB E). Store in a brown bottle, and placed in the dark.
NOTE. 2-butoxyethanol toxic, avoid inhaling its vapor, prevent contact with skin and eyes. Or should be well-ventilated place to work in a fume hood. Its limit
Value is the volume fraction of 5 × 10-5.
5.3 butanone (methyl ethyl ketone).
5.4 methanol.
Note. methanol is toxic avoid inhalation of its vapor, prevent contact with skin and eyes. Working in a fume hood or well-ventilated place.
GB/T 4618.2-2008/ISO 21627-2.2002
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