Hydroxypropylation, guar polymer

Prud homme, R. K., Constien, V., and Knoll, S. (1989). The effects of shear history on the rheology of hydroxypropyl guar gels. In Polymers in Aqueous Media, Glass, J. E. (Ed.), Advances in Chemistry 223, pp. 90-112. Am. Chem. Soc., Washington, DC. 

Although in pxinciple associative thickenos could be prepared from any water-soluble polymer to which hydrophobic blocks can be attached, only three types are commercially available at present hydrophobe-modified polyfetl lene oxide), hydrophobe-modified alkali-soluble acrylic polymers, and hydrophobe-modified hydroxyethyl cellulose. However, the literature contains reports on other types, including hydrophobe-modified polyacrylamide [103], hydrophobe-modified hydroxypropyl guar [104], and a hydrophobe-modified cationic cellulose... 

Shi, HY Zhang, LM. New grafted polysaccharides based on O-carboxymethyl-0-hydroxypropyl guar gum and W-isopropyl-acrylamide Synthesis and phase transition behavior in aqueous media. Carbohydrate Polymers, 2007, 67, 337-342. 

The abihty to moisturize the stratum corneum has also been claimed for the presence of certain hydrophilic polymers, for example, guar hydroxypropyl trimonium chloride [65497-29-2] on the skin. By far the most popular way to moisturize skin is with humectants, some of which are Hsted in Table 12. It is claimed that humectants attract water from the environment and thereby provide moisture to the skin. 

Anionic galactomannans, which are derived from guar gum, in which the hydroxyl groups are partially esterified with sulfonate groups that result from 2-acrylamido-2-methylpropane sulfonic acid and l-allyloxy-2-hydroxypropyl sulfonic acid [1872], have been claimed to be suitable as thickeners. The composition is capable of producing enhanced viscosities, when used either alone or in combination with a cationic polymer and distributed in a solvent. 

R1S Risica, D., Barbetta, A., Vischetti, L., Cametti, C., and Dentini, M., Rheological properties of guar and its methyl, hydroxypropyl and hydroxypropyl-methyl derivatives in semidilute and concentrated aqueous solutions. Polymer, 51, 1972, 2010. 

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