Hydroxy Ethyl Cellulose

 

SidleyCel® HEC (Hydroxy Ethyl Cellulose) is non-ionic cellulose ether, easily dispersed and dissolved in water. It provides thickening, colloid protection, construction property improvement, wetting and stability to final product to ensure high quality. It has high and even degree of substitution and excellent bio-stability, thus can be widely used in stone-like paints, latex paints, oil-drilling additives, detergent, toothpaste and etc.

Typical Properties

Appearance	white or similar to white powder
Molar substitution degree(MS)	1.8-2.5
Loss on drying	≤6.0%
PH	6.0-8.5
Ash content	Max.5%
Particle Size	min.92% pass through 80 mesh
Apparent Density	0.30-0.50 g/ml

 

Paints & Coating Grade HEC

Hydroxyethy Cellulose	Brookfield Viscosity 2% Solution , at 20ºC
HEC – 300SE	250-650 mPa.s
HEC – 2000SE	1500-2500 mPa.s
HEC – 6000SE	4500-6500 mPa.s
	Brookfield Viscosity 1% Solution , at 20ºC
HEC – 15000SE	700-1500 mPa.s
HEC – 30000SE	1500-2400 mPa.s
HEC – 40000SE	2400-3500 mPa.s
HEC – 100000SE	4500-6000 mPa.s

HEC provides excellent thickening efficiency, color development, open time, and superior resistance to biodegradation. It also plays a role in the emulsion, dispersion, stability and water retention. The coating has good rheological properties at different shear rates, and has good workability and leveling performance, good splash and sag resistance.

Oil-drilling Grade HEC

Type	Viscosity mpa.s	Moisture, % ≤	Ash, % ≤	pH
O300	150-400（2%）	5.0	5.0	6.0~8.5
O2000	1500-2500（2%）
O6000	4500-6500（2%）
O15000	700～1500（1%）
O100000	3300～4200（1%）
	4200～4800（1%）
	4800～6000（1%）

O series of HEC is mainly used as viscosifier and fluid loss agent in oil drilling industry. High-viscosity HEC is mainly used as viscosifier in well-completing or finishing fluid; while low-viscosity HEC is mainly used as fluid loss agent.

Packaging and Storage

25KG/bag; or customized packaging.

Comparison Data Sheet

SIDLEYCEL HEC	Natrosol	Tylose	Cellosize
HE-300S	250GR	H 300 P2	QP300
HE-6000S	250MR	H 6000 YP2	QP4400H
HE-6000SE	250MBR	HS 6000 YP2	ER4400
HE-40000S	250HR	H 30000 YP2	QP30000H
HE-40000SE	250HBR	HS 30000 YP2	ER30M
HE-60000S	–	H 60000 YP2	QP52000H
HE-60000SE	250H4BR	HS 60000 YP2	QP52M
HE-100000S	250HHR	H 100000 YP2	QP100MH
HE-100000SE	250HHBR	HS 100000 YP2	ER100M
HE-150000S	250HHR-P	–	–

Dissolve Hydroxyethy Cellulose in water

Retarded Hydroxyethy Cellulose can be directly added into paint formulation, will form homogeneous, glazed solution. Period from powder wetted till dissolution completed call hydration time. During this process, solution build up thickening ability.

Temperature and PH has effect on hydration time. Increase PH to 8.0-10.0, will shorten the time 40-60%; temperature increase will shorten this time as well.

Normally, we suggest to add Hydroxyethy Cellulose at room temperature and neutural situation, hydration time is around 25 minutes.

Application Guide for Paint Industry

High Thickening Effects

1. SidleyCel Hydroxyethy Cellulose provides the latex paints especially high PVA paints with excellent coating performance. When the paint is thick paste, no flocculation will occur.
2. SidleyCel Hydroxyethy Cellulose has higher thickening effects, so can reduce the dosage, improve the cost-effectiveness of formulation, and enhance the washing resistance of paints.

Excellent Rheological Properties

1. The aqueous solution of SidleyCel Hydroxyethy Cellulose is a non-Newtonian system, and the properties of the solution are called thixotropy.
2. In the stationary state, after the product is completely dissolved, the coating system can maintain the best thickening condition and can-opening state.
3. In the dumping state, the system can keep a moderate viscosity, making products with excellent fluidity, and not spatter.
4. During brushing and roller coating, the product is easy to spread on the substrate, so convenient for construction, and meanwhile, has good spatter resistance.
5. Finally, after the coating of paint is completed, the viscosity of the system will immediately get restored, and the paint will immediately produce sagging property.

Dispersion and Solubility

1. SidleyCel Hydroxyethy Cellulose is all treated by the delayed dissolution, and in the case of adding dry powder, can effectively prevent caking and make sure hydration starts after the adequate dispersion of HEC powder.
2. The SidleyCel Hydroxyethy Cellulose after a proper surface treatment can well regulate the dissolution rate and viscosity increase rate of the product.

Storage Stability

SidleyCel Hydroxyethy Cellulose has good mildew-resistant performance, provides enough storage time for paints, and effectively prevent settlement of pigments and fillers.