Natrosol 250 Hydroxyethylcellulose Product Data

Natrosol羟乙基纤维素技术资料Aqualon公司

NUMBER 4146-1

(Supersedes 4146)

NATROSOL ®250Hydroxyethylcellulose

A Nonionic Water-Soluble Cellulose Ether

NATROSOL ®250 hydroxyethylcellulose (HEC),a nonionic water-soluble polymer,is a white,free-flowing granular powder. Natrosol 250 is insoluble in organic solvents,yet it is easily dispersed in cold or hot water to give solutions of varying viscosities. Chemically,it is cellulose that has been etherified with hydroxyethyl groups to give the desired properties.

Natrosol 250 is used as a thickener,protective colloid,binder,stabilizer,and suspending agent,particu-larly in applications where a nonionic material is desired. The HH type is the most efficient nonionic thick-ener available. All viscosity types are obtainable in easy-dispersing form,designated R (e.g.,250 HHR).These R materials have been treated to delay hydration of the particle and thus prevent lumping as the dry powder is added to water. Natrosol B grade (e.g.,250HBR) with improved resistance to biological degrada-tion is also available.

Natrosol 250 NF grades are available for pharmaceutical applications. Typical pharmaceutical uses include tablet binding,sustained release,and solids suspension. High-purity grades of Natrosol,designated as CS grade,are also recommended for cosmetics applications such as thickening shampoos,conditioners,liquid soaps,and shaving creams.

Typical Properties

Solution Viscosity Viscosity (Brookfield at 25°C,cps)

Type 1%2%5%HH 3,400-5,000––H42,600-3,300––H 1,500-2,500––MH 800-1,500

–

–M –4,500-6,500–K –1,500-2,500–G –150-400–E –25-105–J ––250-400L

––

75-150

(over)

Hercules Incorporated Aqualon Division Hercules Plaza

1313 North Market Street Wilmington, DE 19894-0001(302)

Product Data

The products and related information provided by Hercules are for ma nufa cturing use only .Hercules makes no express, implied, or other representation, warranty, or guarantee concerning (i) the handling, use,or application of such products, whether alone, in combination with other products, or otherwise, (ii) the completeness, definitiveness, or adequacy of such information for user’s or other purposes, (iii) the quality of such products, except that such products are of Hercules’standard ers are advised to make their own tests to determine the safety and suitability of each such product or product combination for their own purposes.Read and understand the Material Safety Data Sheet (MSDS) before using this product.

HER.41286 REV .6-99

PRINTED IN U.S.A.

Natrosol羟乙基纤维素技术资料Aqualon公司

NUMBER 4146-1

Page 2 of 3

All viscosity types have the following typical properties. (The higher purity CS and NF grades have more stringent specifications.):

Ash (calculated as Na 2SO 4), %, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5

pH (viscosity solution) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.0-8.5Color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .white to light tan Moisture (as packed), %, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Particle size

Passing U.S.No.40 mesh, %, min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Outstanding Characteristics

White,granular material that disperses and dissolves readily in water to give clear,smooth,nonthixotropic solutions; nonionic and unaffected by high concentrations of soluble salts in solution. Its viscosity is little affected by mild acids and alkalies,and it has good anaerobic burnout properties.

Soluble in cold or hot water up to practical viscosity limits. Has improved tolerance for aqueous-alcohol systems and is solvated by some such systems. Insoluble in and inert to all common nonaqueous organic solvents. Insolubilized by certain resins and reagents.

Has wide compatibility with natural and synthetic gums and with resin and latex emulsions.

Packaged in multiwall 50-lb bags,40 bags per pallet,stretch-wrapped and capped.

Typical Uses

Natrosol ®250 hydroxyethylcellulose has been developed as a uniform,high-efficiency,nonionic,water-soluble polymer. Its uses include the following:

As a thickener in latex paints,paper coatings,latex emulsions,cosmetics and toiletries,coatings,textile printing pastes and inks,and adhesives.

As a protective colloid in vinyl-type polymerization reactions,pigment dispersions,electroplating solutions,and cosmetics.

As a binder in ceramic colors,glazes,refractory compositions,colored pencil leads,burnout-type binders,patching plasters,and tile adhesives.

As a surface coating for textile warp and finish sizing,glass fiber sizing,and paper sizing and treating for absorbency,greaseproofness,and transparency.

In acid thickening for acidizing oil wells,for acid-fracturing rock formations,in metal cleaners,and in surface treatments.

In water-loss control with Portland cement in oil well cements,thin-set tile mortars,and other applications to prevent loss of water to porous strata and surfaces.

Note:Although Natrosol 250 is more resistent to microbiological degradation than natural gums and

colloids,it is recommended that a water-soluble preservative be added if solutions are to be stored.

Natrosol羟乙基纤维素技术资料Aqualon公司

NUMBER4146-1

Page 3 of 3

FDA Status

Natrosol 250HEC is in compliance with requirements of the U.S. Food and Drug Administration for use in materials contacting foods as specified in the Code of Federal Regulations,Title …… 此处隐藏：4409字，全部文档内容请下载后查看。喜欢就下载吧 ……