Hydrophobic Fumed Silica Hb-139 Superior Thixotropy Silicon Dioxide for Weatherability of Coatings

• Customization: Available
• CAS No.: 7631-86-9
• Formula: Sio2
• EINECS: 231-545-4
• Classification: Silicon Dioxide
• Grade Standard: Industrial Grade
• Quality: First Class
• Purity: 99.8%
• Appearance: White Powder
• Primary Particle: 7 -40 Nm
• pH in 4% Dispersion: 5.5~7.5
• Loss on Drying(2 Hour at 105ºC: 1.5 %
• Specific Surface Area(Bet): 200 +- 20m2/G
• Ignition Loss: 2.0
• Transport Package: Bags + Pallets
• Specification: 150 200 300 380
• Origin: China
• HS Code: 281122900
• Production Capacity: 8000 Tons

Product Description

Introduction:

Fumed silica is the superfine micro-nano fine chemical product, which is divided into hydrophilic type and hydrophobic type in accordance with their different surface treatments.

Fumed silica includes Hydrophilic type and Hydrophobic type. And each type has many grades, no matter what grade you used before, we will provide the suitable grade of fumed silica to you.

Its appearance is white powder. Native particle size ranges from 5nm-40nm, with significant functions of thixotropy, reinforcing, thickening and filling. Therefore, it is widely used in the industries of rubber, sealant, plastic, resin, paint, printing ink, papermaking, medicine, cosmetics, food etc.

HB-139 is hydrophobic fumed silica which is produced by HL-200 after chemical post-treatment with HMDS (Hexamethyldisilazane).

Applications

Silicone rubber Defoamer Toner Adhesives & Sealants

Properties

· Low thickening effect and excellent processability enable high loading in polymers
· Excellent reinforcing properties in silicone rubber especially at high filler loading levels (RTV-1, RTV-2, LSR)
· High transparency
· Free flow aid for powders

Physical & Chemical Data
Properties	Unit	Standard Value	Testing Method
pH in 4% dispersion		5.5~7.5	GB/T 20020
Loss on drying (2 hour at 105ºC)	%	≤1.5	GB/T 20020
Loss on ignition (2 hour at 1000° based on material dried for 2 hours at 105ºC)	%	≤10	GB/T 20020
Silica content ( Based on ignited material)	%	≥99.8	GB/T 20020
Tamped density (based on material dried for 2 hours at 105ºC)	g/dm²	40~60	GB/T 20020
Carbon content(based on material  dried for 2 hours at 105ºC)	%	4.5~6.5	GB/T 20020

 

Main Specifications:

Grade	HL-200	HL-380	HB-139	HB-151	HB-615	HB-630
Form	white amorphous powder
Surface area (m2/g)	200±20	380±30	100±20	130±20	160±30	320±30
PH value	3.9-4.5	3.7-4.5	5.5-7.5	3.7-4.5	5.5-7.5	5.5-8.0
Loss on drying (2h,105ºC) %	≤2.0	≤2.5	≤1.5	≤0.7	≤0.5	≤0.5
Loss on ignition (2h,1000ºC) %	≤2.0	≤2.5	≤10	≤2.5	≤4.0	≤4.0
silica content (%)	≥99.8
Tamped density (g/dm²)	30-60	30-60	40-60	40-60	40-60	40-60
Surface treatment	No	No	PDMS	DDS	HMDS	HMDS

 

Application		Main Functions	Recommend Grade	Suggested Usage(%)
Silicone rubber	HTV silicone rubber	reinforcing, transparent	HL-200, HL-300, HL-380, HB-132	0.5 - 3
	Silicone rubber insulator	reinforcing,insulate	HL-150,HL-200,HB-139	0.5 - 3
	RTV silicone rubber	rheology control	HL-150,HL-200,HB Series	0.5 - 3
Powder coating	Corona discharge	free flowing, anti-caking, dispersion, charge control	HB-630,HB-151,HL-200,HL-300,HL-380	0.5 - 3
Varnish	PU, C3H4O2, epoxy-polyester resin, amino		HB-630,HB-151,HL-200,HL-300	0.5 - 3
Liquid coating	industrial paint and marine paint	anti-sagging, anti-settling, thickening, thixotropy,leveling	HB-139,HB-151,HB-630	0.5 - 3
	C3H4O2, olyester resin, UPR resin, nitro	anti-sagging, anti-settling, thickening, thixotropy	HL-200,HL-300	0.5 - 3
	Epoxy rein, vinyl polyester resin, PU	anti-sagging, anti-settling, thickening, thixotropy	HB-151,HB-139	0.5 - 3
Sealant	PU	thixotropy,anti-sagging, water content control	HB-139,HB-151,HL-200	3 - 7
Adhesive	Epoxy	reinforcing, thixotropy, anti-sagging, thickening	HB-139,HB-151, HL-200, HL-300	1.5 - 3
Composite material		thixotropy, anti-settling, anti-sagging, thickening	HL-200, HL-300, HB-151, HB-139	0.5 - 3

Packing:

10kg/Bag ; White craft paper bag,

For 20 GP, 1800kg with 10 pallets, 18bags/pallet ;10kg/ bag.
For 40 GP, 3600kg with 20 pallets, 18bags /pallet; 10kg/ bag.
For 40 HQ, 4000kg with 20 pallets, 20bags /pallet; 10kg/ bag.

FAQs

1. What is your terms of packing?
    Generally, we pack our goods in carton with pallet

2. What is your tems of payment?
    T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

3. What is your terms of delivery?
    EXW, FOB, CFR, CIF,L/C at sight

4. How about your delivery time?
    Generally, it will take 21 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

5. Can you produce according to the samples?
    Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

6. What is your sample policy?
    We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.

7. Do you test all your good before delivery?
    Yes, we have 100% test before delivery
 

 

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