Comparative Evaluation of Dispersants for Aqueous Hydrophobic Fumed Silica Paste

November 7, 2025

EZHOU ANJEKA TECHNOLOGY CO.,Ltd Professional Additive supplier
Test Record
Test Name	Comparative Evaluation of Dispersants for Aqueous Hydrophobic Fumed Silica Paste					Temp./RH
Customer：		Applicant		Test Date：	25.1.14
Experimental Objective: Comparison of Dispersants 6871, 6070, and 6071 in a 70% Barium Sulfate, Resin-Free Paste
Color Paste Formulation
Formula 1				Formula 2
Raw Material	Dosage Unit:Gram	Note		Raw Material	Dosage Unit:Gram	Note
water	69.5			water	69.5
dispersant	20			dispersant	20
7414	0.5	Anjeka		7414	1.5	Anjeka
Hydrophobic Fumed Silica	20	SK-380S		Hydrophobic Fumed Silica	20	SK-380S
Total	110			Total	111
Experimetal Method
1. After 2 hours of shaking, viscosity recorded. 2. Stability observed.
Test Result
Resin-Free Paste Viscosity（mpa.s ）
	Formula 1			Formula 2
Temp.：10	6871	6272	6270A	6871	6272	6270A
State	incomplete matting powder, no flow	incomplete matting powder, no flow	good flow	incomplete matting powder, no flow	incomplete matting powder, no flow	good flow
Viscosity （mpa.s ）			3600			1600

Conclution
6270A - Best for viscosity reduction (Hydrophobic Fumed Silica Paste)
Performed by	Zaidong Zhang

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