Recherches sur la formation et la transformation de dérivés organiques du fluor IV. Sur la phosphorylation d'alcools fluorés par l'acide polyphosphorique et sur la vitesse de scission du fluor et de la liaison ester phosphorique des esters fluoralcoylphos
作者:Emile Cherbuliez、Br. Baehler、G. Cordahi、F. Hunkeler、H. Probst、A. de Picciotto、A. R. Sussmann、A. Yazgi、J. Rabinowitz
DOI:10.1002/hlca.19600430427
日期:——
Some new fluorinated phosphoric esters are described. The rate of hydrolysis of the organic fluorine and of the phosphoric ester bond is studied. The phosphoric ester group has a stabilizing effect on the fluorine in alkaline medium, whereas the fluorine has a labilizing effect on the phosphoric ester group in acid medium (pH 4,5 and HCl 1N). In all the derivatives where only one atom of fluorine is
An emulsion polymerization process for the production of fluoroelastomers is disclosed wherein at least one fluorosurfactant is employed as dispersant, said fluorosurfactant being a fluoroalkylphosphoric acid ester of the formula X—Rf—(CH
2
)
n
—O—P(O)(OM)
2
, wherein n=1 or 2, X=H or F, M=a univalent cation, and Rf is a C
4
-C
6
fluoroalkyl or fluoroalkoxy group. Optionally, a second dispersing agent may be employed in the polymerization, said second agent being a perfluoropolyether having at least one endgroup selected from the group consisting of carboxylic acid, a salt thereof, sulfonic acid and a salt thereof, phosphoric acid and a salt thereof.
Methods of Applying Dental Agents to Dental Surfaces and Polymer Compositions
申请人:Ali Mahfuza B.
公开号:US20080305457A1
公开(公告)日:2008-12-11
A method of applying a dental agent to a dental surface, the method including: applying a retentive polymeric coating to a dental surface; and subsequently contacting the retentive polymeric coating with a loading composition that includes a dental agent, wherein the contacting occurs under conditions effective to incorporate the dental agent into the retentive polymeric coating for release over time. Also provided are polymers that include a hydrophobic segment, a hydrophilic segment, a quaternary amine segment, and an alkoxy silane crosslinkable segment; and polymers that include a hydrophobic segment, a hydrophilic segment, a silicon-containing macromer segment, and an alkoxy silane crosslinkable segment.
A foamable dental composition that includes a film-forming component, wherein the film-forming component forms a retentive polymeric coating on a dental surface.