Crosslinked polysaccharides and methods of production thereof
A polysaccharide and de-crosslinking technology, applied in glyoxal/titanium crosslinked guar gum and its preparation, glyoxal crosslinked guar gum, linked guar gum and glyoxal/glyoxal/, it is a kind of individual Field, can solve the problem that guar gum will turn yellow
Inactive Publication Date: 2013-06-19
RHODIA OPERATIONS SAS
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Problems solved by technology
[0009] Another problem with conventional guar gum is that it can turn yellow which is undesirable, whereas some end formulations require white guar gum
Method used
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[0093] 1. Preparation of Glyoxal-Crosslinked Guar Gum
[0094] Add water, QUAT 188, sodium hydroxide and guar chips to the ribbon blender and mix. The mixture was then heated to 130°F and held constant at 130°F for 1.5 hours. These splits were cooled, washed in a 10:1 (water: splits) ratio for 3 minutes, then filtered and collected. A mixture of glyoxal (40% glyoxal concentration) dissolved in water was added to the wet soybean chips and mixed for 10 minutes. Subsequently, a mixture of citric acid dissolved in water (50% citric acid concentration) was added and mixed for 10 minutes. The flakes were then ground using a speed grinder and an off-white powder was collected. The following is the feeding amount of samples CAT07038.2, CAT07038.3, CAT07038.4 (JAGUAR C-14 type) and CAT07055.1 (JAGUAR C-17 type).
[0095]
[0096]
[0097] H0708478C is JAGUAR C-14BFG prepared by a process similar to CAT07038.1, except that H0708478C was prepared on a factory scale. H0708476C ...
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Abstract
A substantially boron-free method for making a cationic guar comprises reacting particles of polysaccharide with a derivatizing agent to produce derivatized polysaccharide particles, washing the derivatized polysaccharide particles, and contacting, prior to or after the washing step, the particles with a glyoxal compound in order to crosslink the derivatized polysaccharide particles. Also disclosed are methods for making crosslinked derivatized polysaccharides, comprising (a) contacting particles of a polysaccharide with a titanium compound in an aqueous medium having an alkaline pH under conditions appropriate to intra-particulately crosslink the particles; (b) reacting, prior to or after the step of contacting the particles of polysaccharide with the titanium compound, the particles of polysaccharide with a derivatizing agent under conditions appropriate to produce derivatized polysaccharide particles; (c) washing the titanium crosslinked and derivatized particles; (d) contacting, concurrently with or after the step of washing the titanium crosslinked and derivatized particles, such particles with an aqueous medium having an acidic pH under conditions appropriate to substantially de-crosslink the particles; and (e) contacting, concurrently with or after step (d), the de-crosslinked particles with a glyoxal compound under conditions appropriate to intra-particulately crosslink the particles. The crosslinked cationic guar of the present invention is especially useful in home and personal care formulations, especially formulations comprising silicone since it improves silicone deposition.
Description
[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 61 / 024,965, filed January 31, 2008, and U.S. Provisional Application No. 61 / 135,481, filed July 21, 2008, the entire contents of which are incorporated by reference Incorporated into this article. Background technique [0003] The invention relates to cross-linked polysaccharides and a preparation method thereof, in particular to glyoxal cross-linked guar gum and glyoxal / titanium cross-linked guar gum and a preparation method thereof. [0004] Guar gum is sold in several forms, both derivative and non-derivative forms. Among its derivative forms, there are cationic forms, nonionic forms, anionic forms, and combinations of cationic forms, nonionic forms, and anionic forms. Derived guar splits and guar gums include carboxymethyl guar gum, hydroxypropyl guar gum, and hydroxypropyltrimethylammonium guar gum, which are A commercially available material us...
Claims
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IPC IPC(8): C08B37/08
CPCC07H1/00A61K31/715C08B37/00
Inventor 卡罗琳·马比勒克赖格·卢察克
Owner RHODIA OPERATIONS SAS