Difference between revisions of "Hydroxypropyl cellulose"

Latest revision as of 13:41, 14 September 2022

Description

A cellulose ether with a hydroxypropyl functional group substitution. Hydroxypropyl cellulose (HPC) is a nonionic thermoplastic polymer that is soluble in water as well as many organic solvents. Hydroxypropyl cellulose is used as an Emulsifier, Stabilizer, thickener, and film former in many types of solutions such as foods, cosmetics, paint removers, paints and glazes. It is also used as a sizing agent for Paper and consolidant for Leather. While HPC has good photochemical stability, it has poor thermal stability and discolors with age. Although the low molecular weight products, such as Klucel® G, performed better than the high molecular weight products, such as Klucel® M, testing indicates that HPC polymers should not be considered for long term use (Feller and Wilt 1990).

Synonyms and Related Terms

hidroxipropilcelulosa (Esp.); hidroxipropilcelulose (Port.); HPC; hydroxypropylcellulose; cellulose 2-hydroxypropyl ether; oxypropylated cellulose

Examples: Klucel® [Aqualon]

Risks

Combustible.
Fisher Scientific: MSDS

Physical and Chemical Properties

Soluble in cold water, ethanol, acetone and many organic solvents. Insoluble in hot water.
pH = 5.0-8.5.
Softening point = 130C.
CAS = 9004-64-2
Refractive Index = 1.56

Comparisons

General Characteristics of Polymers

Physical Properties for Selected Thermoplastic Resins

Resources and Citations

R.Feller, M.Wilt, Evaluation of Cellulose Ethers for Conservation, in Research in Conservation Series, Getty Conservation Institute, 1990, p.94.

Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry #4888

Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989

@@ Line 1: / Line 1: @@
 == Description ==
-A cellulose ether with a hydroxypropyl functional group substitution. Hydroxypropyl cellulose (HPC) is a nonionic thermoplastic polymer that is soluble in water as well as many organic solvents. Hydroxypropyl cellulose is used as an [http://cameo.mfa.org/materials/fullrecord.asp?name=emulsifier emulsifier], [http://cameo.mfa.org/materials/fullrecord.asp?name=stabilizer stabilizer], [http://cameo.mfa.org/materials/fullrecord.asp?name=thickening agent thickener], and film former in many types of solutions such as foods, cosmetics, [http://cameo.mfa.org/materials/fullrecord.asp?name=paint remover paint removers], paints and glazes. It is also used as a sizing agent for [http://cameo.mfa.org/materials/fullrecord.asp?name=paper paper] and consolidant for [http://cameo.mfa.org/materials/fullrecord.asp?name=leather leather]. While HPC has good photochemical stability, it has poor thermal stability and discolors with age. Although the low molecular weight products, such as Klucel G, performed better than the high molecular weight products, such as Klucel M, testing indicates that HPC polymers should not be considered for long term use (Feller and Wilt 1990).
+A cellulose ether with a hydroxypropyl functional group substitution. Hydroxypropyl cellulose (HPC) is a nonionic thermoplastic polymer that is soluble in water as well as many organic solvents. Hydroxypropyl cellulose is used as an [[emulsifier]], [[stabilizer]], [[thickening agent|thickener]], and film former in many types of solutions such as foods, cosmetics, [[paint remover|paint removers]], paints and glazes. It is also used as a sizing agent for [[paper]] and consolidant for [[leather]]. While HPC has good photochemical stability, it has poor thermal stability and discolors with age. Although the low molecular weight products, such as Klucel® G, performed better than the high molecular weight products, such as Klucel® M, testing indicates that HPC polymers should not be considered for long term use (Feller and Wilt 1990).
 == Synonyms and Related Terms ==
@@ Line 7: / Line 7: @@
 hidroxipropilcelulosa (Esp.); hidroxipropilcelulose (Port.); HPC; hydroxypropylcellulose; cellulose 2-hydroxypropyl ether; oxypropylated cellulose
-Examples: Klucel [Aqualon]
+Examples: Klucel® [Aqualon]
-== Other Properties ==
+== Risks ==
-Soluble in cold water, ethanol, acetone and many organic solvents. Insoluble in hot water.
+* Combustible.
+* Fisher Scientific: [https://fscimage.fishersci.com/msds/10099.htm MSDS]
-pH = 5.0-8.5.  Softening point = 130C.
+==Physical and Chemical Properties==
-{| class="wikitable"
+* Soluble in cold water, ethanol, acetone and many organic solvents. Insoluble in hot water.
-|-
+* pH = 5.0-8.5.
-! scope="row"| CAS
+* Softening point = 130C.
-| 9004-64-2
+* CAS = 9004-64-2
-|-
+* Refractive Index = 1.56
-! scope="row"| Refractive Index
-| 1.56
-|}
-== Hazards and Safety ==
-Combustible.
-Fisher Scientific: [https://fscimage.fishersci.com/msds/10099.htm MSDS]
-== Additional Information ==
-R.Feller, M.Wilt, ''Evaluation of Cellulose Ethers for Conservation'', in Research in Conservation Series, Getty Conservation Institute, 1990, p.94.
 == Comparisons ==
@@ Line 40: / Line 28: @@
 [[media:download_file_342.pdf|Physical Properties for Selected Thermoplastic Resins]]
+==Resources and Citations==
+* R.Feller, M.Wilt, ''Evaluation of Cellulose Ethers for Conservation'', in Research in Conservation Series, Getty Conservation Institute, 1990, p.94.
+* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
-== Authority ==
-* Richard S. Lewis, Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry #4888
-* Book and Paper Group, Book and Paper Group, ''Paper Conservation Catalog'', AIC, 1984, 1989
+* Book and Paper Group, ''Paper Conservation Catalog'', AIC, 1984, 1989
 [[Category:Materials database]]