前言
国际标准化组织 (国际标准化组织) 是国家标准机构 (国际标准化组织会员) 世界联合会的. 国际标准的制定通常通过ISO技术委员会进行. Each interested in the subject of which a technical committee has been set up members of the group have the right to send representatives to participate in the committee. Liaison with ISO international organizations, governments and ngos to participate in the work. ISO 与国际电工委员会 (国际电工委员会) on all electrical and standardized issues closely.

部分 1 ISO/IEC 指令的描述了用于制定本文件的程序以及用于进一步维护的程序. 尤其, 应注意不同类型ISO文件所需的不同批准标准. 本文件根据部分编辑规则起草 2 ISO/IEC 指令的 (请参阅 iso.org/directives).

请注意，本文档的某些元素可能是专利权的主题. ISO 不负责识别任何或所有此类专利权. In the process of document development determine the detailed information of any patent rights in the introduction and/or received ISO (参见 iso.org/patents) patent statement list.

国际标准化组织 3251-2019 “涂料中非挥发性化合物的测定, 清漆和塑料”

本文档中使用的任何商品名称仅供参考，仅供用户参考，并不构成对其的认可.

Voluntary interpretation, 相关标准和合格评定相关的ISO特定术语和表达的含义以及ISO在技术性贸易壁垒中的含义 (技术性贸易壁垒) 坚持世界贸易组织原则 (世贸组织) 信息, please refer to

Iso.org/iso/foreword.html.

This document is prepared by Technical Committee ISO/TC 35, 油漆和清漆, 小组委员会SC 9, General Test methods for paints and varnishes.

The fifth edition eliminates and replaces the fourth edition (国际标准化组织 3251:2008), 已进行技术修订. The main changes from the previous edition are as follows:

国际标准化组织 3251-2019 “涂料中非挥发性化合物的测定, 清漆和塑料”

To ISO 4618 – increased in clause 3 general reference of the terms and definitions:

— 4.5 example of desiccant to silica gel in orange, because no longer allowed to use cobalt chloride as the indicator;

— Corrected accuracy data for polymer dispersions: the figures given in the 2008 edition were ± data, which have now been correctly converted to percentages;

— General test parameters for paint powders (powder resins) have been removed from Table A.1 because ISO 8130-7 can be used instead;

— Added common test parameters for waterborne coatings in Table A.1.

Any feedback or question this file should be submitted to the national standards organizations of users. A full list of these agencies can be found at iso.org/members.html.

国际标准化组织 3251-2019 “涂料中非挥发性化合物的测定, 清漆和塑料”

介绍
For methods that can be used for unplasticized polymer dispersions and rubber latex, the non-volatile residues (mainly composed of polymer materials and small amounts of additives, such as emulsifiers, protective colloids, stabilizers, solvents added as film forming agents and — especially for rubber latex concentrates — preservatives) need to be chemically stable under the test conditions. For plasticized samples, residues usually include plasticizers by definition.

国际标准化组织 3233 (所有部分) specifies test methods for determining the content of non-volatile substances in paints, varnishments and related products.

1 适用范围
This document specifies a determination of paint, 漆, paint and varnish binder, polymer dispersions and condensation resin (such as phenolic resin (JiaJie phenolic resin and novolac solution, ETC。)) method of non-volatile matter content.

This method can also be applied to preparation containing fillers, pigments and other additives, such as thickening agent, film former dispersions.

笔记 1: the product of the volatile matter content is not absolute, but rather depends on the determination of the temperature and heating time. 所以, when this method is used, only relative rather than true values of the non-volatile content can be obtained due to solvent retention, thermal decomposition, and evaporation of low molecular weight components. 所以, this method is mainly used to test different batches of the same type of product.

笔记 2 This method is suitable for synthetic rubber latex, provided that heating for a specified period of time is considered appropriate (国际标准化组织 124 provides heating until the mass loss of 2 g of the test portion is less than 0.5 mg after continuous heating).

国际标准化组织 3251-2019 “涂料中非挥发性化合物的测定, 清漆和塑料”

笔记 3 Internal methods for determining nonvolatile substances usually include drying with infrared or microwave radiation. The standardization of this kind of method is impossible, because they are not universal. Several polymer compositions tend to break down during this treatment and therefore give incorrect results.

2 规范性引用文件
In the article refer to the following documents, the requirements of some or all of the content of this document. 对于注明日期的参考文献, 仅引用的版本适用. 对于未注明日期的参考文献, the new version of the applicable reference documents (包括任何修正案).

国际标准化组织 123, Rubber latex – 采样

国际标准化组织 124, 乳胶, 橡皮, the determination of total solid content

国际标准化组织 1513, 油漆和清漆 – test sample inspection and preparation

国际标准化组织 4618, 油漆和清漆 – 术语和定义

国际标准化组织 15528, 油漆, 清漆以及油漆和清漆的原材料 — 采样

国际标准化组织 3251-2019 “涂料中非挥发性化合物的测定, 清漆和塑料”

3 术语和定义
就本文件而言, ISO 中给出 4618 terms and definitions apply.

ISO 和 IEC 在以下地址维护标准化术语数据库:

– ISO在线浏览平台: iso.org/obp

– IEC 百科全书: 可以在 electropedia.org/ 上找到

仅标准信息组件是公开的. 查看完整内容, 您需要通过正规渠道购买标准.