polyacid


Also found in: Dictionary, Wikipedia.

pol·y·ac·id

(pol-ē-as'id),
An acid capable of liberating more than one hydrogen ion per molecule; for example, H2SO4, citric acid.
[G. polys, much, many + acid]

polyacid

(pŏl″ē-ăs′ĭd)
An alcohol or a base with two or more hydroxyl groups that will combine with an acid.
Mentioned in ?
References in periodicals archive ?
A] increases, the protons remain more attracted towards polyacid and become less and less mobile, which leads to a continuous reduction in the strengh of acidity of the polyelectrolyte [7-14].
More complex materials have been developed by modifications of the Polyacid with side chains that can be polymerized by a light--curing mechanism.
has obtained a patent for a can comprised of a body portion; and an end portion, wherein at least one of the body and end portions are aluminum and are coated on at least one major surface with a coating composition comprised of a blend of two or more polyester resins each formed by the reaction of one or more polyacid molecules and One or more polyol molecules, wherein the blend has between approximately 60%-90% weight polyester resin having a Tg less than 25[degrees] C and between about 10%-40% weight polyester resin having a Tg greater than 50[degrees]C; 2%-20% weight acrylate copolymer, based on the total weight of resin solids in the coating composition; and a crosslinker, and wherein the coating composition is substantially free of mobile BPA and aromatic glycidyl ether compounds.
JVS-Polymers Oy, Espoo, Finland has been granted a patent for a biodegradable, curable structurally star shaped polyester resin composition, characterized in that the resin composition is based on hydroxy acid units structural units derived from unsaturated difunctional monomers; structural units derived from polyol monomers or polyacid monomers, the composition being the polycondensation product of 60-99.
An investigation of ion-exchange properties of the products of esterification has shown that the enrichment of ester groups of cellulose by condensed phosphates results in an increase of the ion-exchange capacity at the expense of capability of polyacid protons to participate in reactions of ion exchanger [ILLUSTRATION FOR FIGURE 2 OMITTED].
The branched hydroxyl terminated oligoester polyol is the reaction product of a hydroxyl terminated oligoester diol and a polyacid or anhydride having a carboxyl functionality of three or greater; and a uretdione crosslinking agent, the branched hydroxyl terminated oligoester polyol and crosslinking agent each being in relative amounts effective for curing the powder coating composition at a temperature of about 160[degrees] C without the use of an effective amount of urethane catalyst and at less than 160[degrees] C with the use of a urethane catalyst to provide a cured coating having a pencil hardness of HB or greater, a direct impact resistance of 80 lb.
Alkyd resins are formed by the step-growth polymerization of polyols and polyacids with the incorporation of pendant fatty acid chains.
products of hydrolysis of polysaccharides: monoses or dextrins; products of soil metabolism: low-molecular weight acids, polyacids, low-molecular weight products of condensation, etc.
van Blitterswijk, Polyacids as bonding agents in hydroxyapatite polyester-ether (polyactiveTM 30/70) composites, J.
Early patents by Procter & Gamble disclosed the use of polyacids and free calcium ions to stabilize protease enzymes.