הקדמה
ISO (ארגון בינלאומי לתקינה) הוא גופי התקנים הלאומיים (חבר ISO) of the world federation. פיתוח תקנים בינלאומיים מתבצע בדרך כלל באמצעות ועדות טכניות של ISO. 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 with the international electrotechnical commission (חברת החשמל) on all electrical and standardized issues closely.

חֵלֶק 1 of the ISO/IEC Directive describes the procedures used to develop this document as well as those used for further maintenance. באופן מיוחד, יש לשים לב לקריטריוני האישור השונים הנדרשים עבור סוגים שונים של מסמכי ISO. מסמך זה נוסח בהתאם לכללי העריכה של חלק 2 של הוראת ISO/IEC (ראה iso.org/directives).

Please note that certain elements of this document may be the subject of patent rights. ISO אינה אחראית לזיהוי כל זכויות פטנט כאלה או כולן. In the process of document development determine the detailed information of any patent rights in the introduction and/or received ISO (ראה iso.org/patents) patent statement list.

ISO 3251-2019 “Determination of nonvolatile compounds in Paints, varnishments and Plastics”

Any trade names used in this document are provided as information for the convenience of users and do not constitute an endorsement thereof.

Voluntary interpretation, related standards and conformity assessment related ISO specific terminology and express the meaning of and the ISO in the technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) מֵידָע, please refer to

Iso.org/iso/foreword.html.

This document is prepared by Technical Committee ISO/TC 35, צבעים ולכות, ועדת המשנה SC 9, General Test methods for paints and varnishes.

The fifth edition eliminates and replaces the fourth edition (ISO 3251:2008), which has been technically revised. The main changes from the previous edition are as follows:

ISO 3251-2019 “Determination of nonvolatile compounds in Paints, varnishments and Plastics”

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.

ISO 3251-2019 “Determination of nonvolatile compounds in Paints, varnishments and Plastics”

מבוא
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.

ISO 3233 (כל החלקים) specifies test methods for determining the content of non-volatile substances in paints, varnishments and related products.

1 היקף היישום
This document specifies a determination of paint, varnish, paint and varnish binder, polymer dispersions and condensation resin (such as phenolic resin (JiaJie phenolic resin and novolac solution, וכו ')) 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.

הערה 1: the product of the volatile matter content is not absolute, but rather depends on the determination of the temperature and heating time. לָכֵן, 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. לָכֵן, this method is mainly used to test different batches of the same type of product.

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

ISO 3251-2019 “Determination of nonvolatile compounds in Paints, varnishments and Plastics”

הערה 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 מסמכי התייחסות נורמטיביים
In the article refer to the following documents, the requirements of some or all of the content of this document. להפניות מתוארכות, רק הגרסה המצוטטת חלה. להפניות ללא תאריך, the new version of the applicable reference documents (including any amendment).

ISO 123, Rubber latex – דְגִימָה

ISO 124, שרף גומי, גוּמִי, the determination of total solid content

ISO 1513, צבעים ולכות – test sample inspection and preparation

ISO 4618, צבעים ולכות – מונחים והגדרות

ISO 15528, צבעים, לכות וחומרי גלם לצבעים ולכות — דְגִימָה

ISO 3251-2019 “Determination of nonvolatile compounds in Paints, varnishments and Plastics”

3 מונחים והגדרות
For the purpose of this document, given in the ISO 4618 terms and definitions apply.

ISO וחברת החשמל מחזיקות מאגרי מינוח לתקינה בכתובות הבאות:

– פלטפורמת גלישה מקוונת ISO: iso.org/obp

– חברת החשמל אלקטרופדיה: זמין באתר electropedia.org/

רק רכיב המידע הסטנדרטי זמין לציבור. לצפייה בתוכן המלא, תצטרך לרכוש את התקנים דרך ערוצים רשמיים.