Welan gum
From Infogalactic: the planetary knowledge core
(Redirected from Welan)
Identifiers | |
---|---|
96949-22-3 | |
Properties | |
Appearance | white to cream colored powder |
Density | 26.25 lbs/ft³ (bulk) |
Vapor pressure | {{{value}}} |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
|
![]() ![]() ![]() |
|
Infobox references | |
Welan gum is an exopolysaccharide used as a rheology modifier in industrial applications such as cement manufacturing.[1] It is produced by fermentation of sugar by bacteria of the genus Alcaligenes. The molecule consists of repeating tetrasaccharide units with single branches of L-mannose or L-rhamnose. In solution, the gum exhibits viscosity retention at elevated temperature, and is stable in a wide pH range, in the presence of calcium ion, and with high concentration of glycols.[2][3][4]
See also
References
- ↑ US patent 5004506, "Welan gum in cement compositions", issued 2 April 1991, assigned to Merck & Co., Inc.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Lua error in package.lua at line 80: module 'strict' not found.
<templatestyles src="Asbox/styles.css"></templatestyles>