These are compounds that absorb or adsorb water vapour from air. Some may absorb so much water they actually dissolve in the water they have absorbed and one is left with a solution. Instant coffee granules will do this, left for a few hour...
http://wiki.answers.com/Q/What_are_hygroscopic_compound...
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It means any substance that readily absorbs moisture, like from the atmosphere.
http://wiki.answers.com/Q/What_does_hygroscopic_mean
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United States Patent 3008472 ... US Patent References:; /0109486.html; - - 0109486; Process of producing spotted effects on novelties, etc.; - - 1979084; Method of making a stiffened permeable resin coated fibrous sheet; - - 2603575; Filter tip for tobacco products; ... Touey, George P.
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www.freepatentsonline.com/3008472.html
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Hence, the instant invention is directed to a method for preparing a stable, anhydrous non-hygroscopic zinc phosphate compound which is suitable for use as ...
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www.patentstorm.us/patents/5482526/description.html
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A method for preparing a stable, anhydrous non-hygroscopic zinc phosphate compound comprising the steps of: (a) forming an aqueous slurry mixture by ...
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www.patentstorm.us/patents/5482526/claims.html
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Hygroscopic properties of ammonium sulfate aerosols mixed with slightly soluble organic compound. Kaarle Hämeria, Robert J. Charlsonb, Hans-Christen ...
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linkinghub.elsevier.com/retrieve/pii/S002185029785077X
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What causes hygroscopic compounds to absorb water? Barb Early ... Hygroscopic compounds take up water from the air for many different reasons. Here are a few: ... Ionic compounds are often hygroscopic because they form stable hydrates.
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antoine.frostburg.edu/chem/senese/101/compounds/faq/why...
antoine.frostburg.edu/chem/senese/101/compounds/faq/why-hygroscopic.shtml
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The present invention relates to a composition comprising a cyclopropene, for example 1-MCP, encapsulated in a cyclodextrin matrix, a hygroscopic compound, yeast and/or other enzymes involved in the production of alcohols and aldehydes from organic substrates, and, optionally an organic substrate for the enzymes.
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www.freshpatents.com/Compositions-and-methods-to-improv...
www.freshpatents.com/Compositions-and-methods-to-improve-the-storage-quality-of-packaged-plants-dt20060713ptan20060154822.php
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I claim: 1. A method of treating a shaped structure of a solid, high molecular weight polyamide to improve the antistatic, hygroscopic and dye receptive properties of the polymer while retainingits structural shape, comprising heating the polymer structure with an aqueous treating solution containing an...
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www.patentgenius.com/patent/4563507.html
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