echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Coatings News > Paints and Coatings Market > Overview and film-forming mechanism of water-based coalescents!

    Overview and film-forming mechanism of water-based coalescents!

    • Last Update: 2022-02-16
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

    01 Overview of Coalescent Agents


    The film-forming aids of water-based coatings, also known as coagulants, coalescing agents, film-forming aids or co-solvents, can dissolve and swell the polymer particles in the emulsion, so that the particles can also change with moisture at lower temperatures.


    Water-based coating film-forming additives are widely used in architectural coatings (latex paint), water-based automotive coatings and automotive refinish coatings, water-based electrophoretic coatings, water-based marine coatings, water-based container coatings, water-based anti-corrosion coatings, water-based industrial coatings, water-based adhesives, water-based woodware Coatings, water-based coil and coil coatings, water-based screen printing inks, water-based gravure inks, water-based flexo inks, UV water-based paint inks, and more .


    02 Selection criteria for coalescents


    The ideal coalescent should have the following properties:

    (1) The film-forming aid must be a strong solvent for the polymer, has excellent film-forming efficiency for a variety of water-based resins, and has good compatibility, and can reduce the minimum film-forming temperature of water-based resins.



    03 Film-forming mechanism of water-based coatings


    The film-forming process of water-based paint is more complicated, and it has to go through a process from dispersed polymer particles to agglomeration of each other into a whole


    (1) The particles gradually move closer to the filling process.



    04 Usage and dosage of film-forming aids for water-based coatings


    Polymers such as emulsions or dispersions generally have a glass transition temperature Tg above room temperature


    The amount of coalescent agent added depends on the amount of emulsion or aqueous dispersion in the formulation and the glass transition temperature Tg



    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.