GB/T 1725-2007
Paints,varnishes and plastics.Determination of non-volatile-matter content (English Version)

Standard No.

GB/T 1725-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 1725-2007

Replace

GB/T 6751-1986 GB/T 6740-1986 GB/T 1725-1979

Scope

This standard specifies the method for the determination of the non-volatile content of paints, varnishes, paint bases for paints and varnishes, polymer dispersions and polycondensation resins such as phenolic resins (resol, novolac solutions, etc.). This standard also applies to dispersions containing pigments, fillers and other additives such as thickening aids and coalescents. This standard can also be used for unplasticized polymer dispersions and latexes whose non-volatile residues (mainly polymeric material and small amounts of auxiliaries such as emulsifiers, protective colloids, stabilizers, solvents added as coalescents, Especially preservatives used in latex concentrates) shall be chemically stable under the test conditions. For plasticizable samples, the non-volatile residue usually includes the plasticizer. Note 1: The non-volatile content of the sample is not an absolute quantity, but depends on the heating temperature and time used in the determination. Therefore, when using this method, due to the retention of solvent, thermal decomposition and volatilization of low molecular weight components, the obtained non-volatile residue content is only a relative value rather than a true value. Therefore, this method is mainly used for different batches of similar products. test. Note 2: This method is applicable to synthetic latex, as long as the heating time is appropriate (ISO 124 stipulates that the mass loss of a 2 g sample should be less than 0.5 mg during two consecutive heating periods during heating). Note 3: Methods for determining non-volatile matter usually also include drying methods using infrared or microwave radiation. Since these methods are not universal, they cannot be standardized. Some polymer components decompose under the processing conditions giving erroneous results. ISO 3233:1998 Paints and varnishes, by measuring the dry coating density to determine the volume fraction of non-volatile matter, it specifies the method for determining the volume fraction of non-volatile matter in paints, varnishes and related products.

GB/T 1725-2007 Referenced Document

• GB/T 20777-2006 Paints and varnishes Examination and preparation of samples for testing
• GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes. Sampling
• GB/T 6753.4-1998 Paints and varnishes--Determination of flow time by use of flow cups
• GB/T 8298-2001 Natural rubber latex concentrate--Determination of total solids content
• ISO 123:2001 Rubber latex - Sampling

GB/T 1725-2007 history

• 2007 GB/T 1725-2007 Paints,varnishes and plastics.Determination of non-volatile-matter content
• 1979 GB/T 1725-1979 Methods of test for non-volatile matter of varnishes,paints and their vehicles

GB/T 1725-2007 Paints,varnishes and plastics.Determination of non-volatile-matter content has been changed from GB/T 6751-1986 Paints and varnishes--Determination of volatile and non-volatile matter.

GB/T 1725-2007 Paints,varnishes and plastics.Determination of non-volatile-matter content has been changed from GB/T 6740-1986 Paint media--Determination of volatile and non-volatile matter.