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    Home > Coatings News > Paints and Coatings Market > Shanghai Chemical Construction Association: "Multilayer Architectural Coatings" new standard will be implemented soon

    Shanghai Chemical Construction Association: "Multilayer Architectural Coatings" new standard will be implemented soon

    • Last Update: 2021-07-30
    • Source: Internet
    • Author: User
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    Global Coatings Network News:

    "Multilayer Architectural Coatings" GB/T9779-2015 will be implemented on August 1, 2016.
    Compared with GB/T9779-2005, the main technical changes are as follows:

    Global Coatings Network News:

    Modified product classification.
    The original standard divides the multi-layer coatings into polymer cement series, silicate series, silicate series and reaction curing synthetic resin emulsion series according to the main components of the bonding material in the main coating; Coatings are divided into interior walls and exterior walls.
    According to the construction thickness and product type, they are divided into thin coatings (monochrome, colorful), thick coatings (heavy grout, rock chip, sand) and composite , And correspondingly added terms, definitions and marks;

    Increase the product workability, drying time, alkali resistance, water resistance and washing resistance, etc.
    ; especially for exterior wall multi-layer architectural coatings for external insulation systems, and increase water vapor transmission rate test; for elastic multi-layer coatings, Added flexibility and elongation at break test;

    The new standard modifies the test substrate, abandoning the use of asbestos cement slabs, instead using non-asbestos fiber cement slabs;

    It is particularly worth mentioning that the new standard adds the respective performance indicators of primer, middle coat and top coat in the appendix to facilitate customers to send for testing and testing of single-layer coatings.
    (Source: Global Coatings Network) (For more information, please log in: Global Coatings Network
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