ASTM WK45151

    Work Item: ASTM WK45151 - Revision of D2243 - 95(2008) Standard Test Method for Freeze-Thaw Resistance of Water-Borne Coatings

    (What is a Work Item?)

    Active Standard: D2243 - 95(2008)

    Developed by Subcommittee: D01.42 | Committee D01 | Contact Staff Manager



    1. Rationale

    There are two changes recommended for this method: 1.With the lower VOC systems currently being developed, the practice of using an extra 24 hours of thawing after each freeze has actually helped show freeze/thaw recovery that is not found in running the method the current way. The recommendation has been made to put in an alternative version of the method for lower VOC systems (arbitrarily drawing the line at 50 g/l). See the red text in the method below. Suggested alternatives requested. 2.As objected before the last ballot, most people take the test container and open it to check the consistency of the paint every cycle when testing to 5 cycles. The method states that it should ONLY be opened and stirred after completing the agreed upon cycles. PER THE METHOD, the only way to check where between the 0 and 5 cycles a product fails would be to have five F/T containers of the paint to check each step of the way, at the end of the 5 cycles of testing. (one container goes only one freeze/thaw cycle, another goes two, the next three) This way the paint is not being disturbed between freeze/thaw cycles. See the green text in the method below.


    Keywords

    freeze-thaw resistance; resistance to low-temperature cycling; Stability--paints/related coatings/materials; Temperature tests--paints/related coatings/materials; Terminology--paints/related coatings/materials; Visual examination--paints/related coatings/materials; Emulsion vehicles (for paints/related coatings); Exposure tests; Freezing and thawing; Package stability; Waterborne coatings;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    02-20-2014

    Technical Contact:
    Douglas Mall

    Status:
    Draft Under Development