This standard specifies a method for determining the content of coarse particles and coagulates in polymer dispersions by sieving. The content of coarse particles and coagulates is calculated by sieving the polymer dispersion diluted, using a metal sieve, washing and drying residue on sieve. Coarse particles refer to particles 10 or 100 times larger than the average particle size, while coagulates do not include cortical material and fragments larger than 5mm in diameter. This method is suitable for detecting solid impurities in polymer dispersions, helping to evaluate the mass and Stability of products.
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