Fumed Silica for Desiccants/Anticoagulants on Sale

Product Description

Hydrophilic silica is used to reinforce and thicken silicone as an anti-slip agent for food and industrial powders, and to thicken non-polar solvents such as xylene, white spirit and styrene.Small particle size, large specific surface area, good thermal stability and low water content;
1.Reinforcing: Improve the tensile strength, tear strength, toughness and impact resistance of the product;
2.Thickening, improving the product consistency of liquid system, rheological control, thickening without thinning;
3.Thixotropy, one touch change, improve the rheological and thixotropy of liquid systems;
4.Anti caking, promote and maintain the fluidity and anti caking performance of powder particles;
5.Anti sagging: prevent the liquid from flowing and sagging, and improve the flatness of the construction surface;
6.Anti sedimentation, improves the adhesion of various systems, effectively prevents layered sedimentation, and is an ideal suspending agent;
Thermal insulation, thermal conductivity and excellent thermal insulation effect;
Technical Parameter:
 

Specifications

   

Grades	HFS-150	HFS-200	HFS-300	HFS-380
Specific Surface Area (BET)	150±15 m²/g	200±20 m²/g	300±25 m²/g	380±30 m²/g
pH value in 4% dispersion	3.9-4.5	3.9-4.5	3.7-4.5	3.7-4.5
Loss on drying (2 hours at 105ºC)	≤1.5%	≤2.0%	≤2.0%	≤2.5%
Loss on ignition(2 hours at 1000ºC based on material dried for 2 hours at 105ºC)	≤2.0%	≤2.0%	≤2.5%	≤2.5%
Sieve Residue(45μm)	≤250mg/kg	≤250mg/kg	≤250mg/kg	≤250mg/kg
Silica Content(Based on ignited material)	≥99.8%	≥99.8%	≥99.8%	≥99.8%
Tap Density(Based on material dried at 105ºC for 2 hours)	40-60g/dm³	40-60g/dm³	40-60g/dm³	40-60g/dm³
Typical Applications	1.HTV and RTV Silicone rubber 2.Adhesives and Sealants 3.Coatings and Paintings	1.Coatings & Paintings 2.Adhesives & Sealants  3.HTV&RTV Silicon Rubbers 4.Thin Film & UPR  5.Printing Ink 6.Fertilizer & Pesticide  7.Cosmetics	1.Coatings & Paintings 2.Silicone rubber and Other elastomers 3.Thin Film & UPR 4.Adhesives and Sealants 5.Printing ink	1.Coatings & Paintings 2.Silicone rubber and Other elastomers 3.UPR 4.Adhesives and Sealants 5.Printing ink

 

echnical Specifications

Item No	Index	Measured Value
Appearance	White powder	Compliance index
Specific surface area of nitrogen adsorption m²/g	200±10	200
Sio2- content	>99.8	99.9%
PH	3.7-4.5	4.19
Volatile matter % at 105 ºC	≤3.0	0.82
Tamping density g/dm³	30-60	31
Sieve residue(45μm) mg/kg	≤250	19.93

 

Properties	Unit	Typical Value	Testing Method
Silica Content(Based on ignited material)	%	≥99.8	GB/T 20020
PH value in 4% dispersion	-	3.9~4.5	GB/T 20020
Specific Surface Area(BET)	m2/g	150±15	GB/T 20020
Loss on drying(2 hours at 105ºC)	%	≤1.5	GB/T 20020
Loss on ignition (2 hours at 1000ºC) (based on material dried for 2 hours at 105ºC)	%	≤2.0	GB/T 20020
Sieve Residue(45μm)	%	≤0.04	GB/T 20020
Tamped Density (Based on material dried at 105ºC for 2 hours)	g/L	40~60	GB/T 20020

Properties
Reinforcing filler in elastomers
Rheology and thixotropy control in liquid systems
Anti-settling, thickening and anti-sagging agent
Free flow aid and anti-caking aid for powders

Applications 
HTV and RTV Silicone rubber
Adhesives and Sealants
Coatings and Paintings