GB/T 31412-2015 English PDF

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GB/T 31412-2015: Binders for paints and varnishes -- Determination of hydroxyl value -- Titrimetric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31412-2015	169	Add to Cart	3 days	Binders for paints and varnishes -- Determination of hydroxyl value -- Titrimetric method	Valid

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Basic data

Standard ID: GB/T 31412-2015 (GB/T31412-2015)
Description (Translated English): Binders for paints and varnishes -- Determination of hydroxyl value -- Titrimetric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G50
Classification of International Standard: 87.060.20
Word Count Estimation: 8,825
Date of Issue: 2015-05-15
Date of Implementation: 2015-10-01
Quoted Standard: GB/T 3186; GB/T 6682-2008; GB/T 6743-2008; GB/T 12805; ISO 648-2008; ISO 7142-2007
Adopted Standard: ISO 4629-1996, MOD
Regulation (derived from): National Standard Announcement 2015 No. 15
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 method for the determination titration paints and varnishes and paints based solution free hydroxyl groups. This hydroxy group may polyols, in the form of partial esters, fatty acid polyesters or hydroxyl end group presence. This Standard does not apply to a hydroxyl group and epoxy resin containing two groups, since the latter is also included in the results. This Standard does not apply to a nitrocellulose or phenolic resins. Determination of hydroxyl epoxy resin according to ISO 7142: 2007 regulations were.

GB/T 31412-2015: Binders for paints and varnishes -- Determination of hydroxyl value -- Titrimetric method

---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.
Binders for paints and varnishes. Determination of hydroxyl value. Titrimetric method ICS 87.060.20 G50 National Standards of People's Republic of China Paints and varnishes hydroxyl value titration (ISO 4629.1996, MOD) Issued on. 2015-05-15 2015-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard uses redrafted law revision of international standards ISO 4629.1996 "Paints and varnishes - Determination of hydroxyl value based paint drops Fixed "to develop. This standard and ISO 4629.1996 technical differences exist compared to the terms of these differences has been involved through its outer margin bits Opposed to a single vertical line (|) have been marked, the list given in Appendix A corresponding technical differences and their causes. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee paint pigment (SAC/TC5) centralized. This standard was drafted. CNOOC Changzhou Paint Chemical Research Institute Co., Ltd., Shanghai Institute of paint, Shenzhen Hirota Decoration Group shares Parts Ltd., Guangzhou standard laboratory equipment Geda Products Co., Ltd. Beijing Blue Zhou Industrial Co., corrosion protection, marine chemical Research Institute Company Limited. The main drafters of this standard. Huang Yidong, Xia Yan, Li Shaojiang, Wang Chongwu, Liu Xiaoping, Li Song Sang. Paints and varnishes hydroxyl value titration

1 Scope

This standard specifies the method for the determination titration paints and varnishes and paints based solution free hydroxyl groups. This can hydroxyl polyols, partial In the form of an ester, polyester or hydroxy fatty acid end groups present. This standard does not apply to a hydroxyl-containing resin and epoxy two basic groups, since the latter are also included in the results. This standard does not apply to Phenolic resin or nitrocellulose. Note. If the binder solution only measured hydroxyl value based paint, the other components may contain hydroxy binder solution must be taken into account. Determination of hydroxyl number of epoxy resin by ISO 7142.2007 will be specified.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528.2000, IDT) Laboratory use specifications and test methods GB/T 6682-2008 Analysis GB/T 6743-2008 plastic polyester resins, paints and varnishes partial acid value and total acid value (ISO 2114. 2000, IDT) GB/T 12805 Laboratory glassware burette (GB/T 12805-2011, neqISO 385.2005) ISO 648.2008 Laboratory glassware single pipette (Laboratoryglassware-Single-volumepipettes) ISO 7142.2007 Paints and varnishes epoxy Common test methods (Bindersforpaintsand varnishes-Epoxyresins-Generalmethodsoftest)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Hydroxyl value hydroxylvalue Under the specified test conditions, 1g sample was acetylated in the hydroxyl consumed potassium hydroxide (KOH) in milligrams. Principle 4 Sample containing hydroxyl groups with acetic anhydride acetylation. The excess acetic anhydride is hydrolyzed with potassium hydroxide solution titrated acetic acid produced by Indicator or potentiometric titration method to determine the end point. NOTE. If present in the sample of primary and secondary amines, they will be acetylated. In this case, the results hydroxyl value contains primary and secondary amines.

5 Reagents

5.1 potassium hydrogen phthalate [C6H4 (COO) 2COOHK]. ......

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