Patent application number | Description | Published |
20100310804 | Polyphenyl sulfone ketone copolymers - A polymer comprising sulfone groups, ketone groups and optionally substituted polyarylene groups, wherein the number of moles of sulfone groups over the number of moles of ketone groups ratio is greater than 1. A process for making such polymer, a composition comprising such polymer, and articles made therefrom. | 12-09-2010 |
20110201775 | High purity diphenyl sulfone, preparation and use thereof for the preparation of a poly(aryletherketone) - The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the removal of such impurities. | 08-18-2011 |
20110213095 | Method for the manufacture of poly(aryl ether ketone)s in the presence of sodium carbonate - Sodium carbonate (Na | 09-01-2011 |
20110213115 | Process for preparing a poly(aryl ether ketone) using a high purity 4,4'-difluorobenzophenone - The present invention describes a process for preparing a poly(aryl ether ketone) by reacting a nucleophile with 4,4′-difluorobenzophenone (4,4′-DFBP) that is improved through the use of 4,4′-DFBP that meets one or more particular purity conditions. Also described are improved poly(aryl ether ketone) produced using the invention 4,4′-DFBP. Amounts of 2,4′-difluorobenzophenone (2,4′-DFBP), 4-monofluorobenzophenone (4-FBP), chlorine, and monochloromonofluorobenzophenone in 4,4′-DFBP are discussed. | 09-01-2011 |
20110224399 | Improved poly(aryletherketone)s and process for making them - Improved poly(aryletherketone)s with superior melt stability, lower gel content and lower color and a new process for their manufacture. | 09-15-2011 |
20140039222 | Process for the manufacture of dihalodiphenylsulfones - A process for the preparation of dihalodiphenylsulfones_such as 4,4′-dichlorodiphenyl sulfone or 4,4′-bis-(4-chlorophenylsulfonyl)biphenyl with high regioselectivity, at low temperature and in the absence of toxic reagents by reacting together at least one acid, at least one fluorinated anhydride and at least one halobenzene. The invented process is particularly suited for the manufacture of 4,4′-dichlorodiphenyl sulfone. | 02-06-2014 |
20140163192 | POLY(ARYLETHERKETONE)S AND PROCESS FOR MAKING THEM - Poly(aryletherketone)s comprising fluoride end groups having improved melt stability, lower gel content and lower color are provided. | 06-12-2014 |
20140221595 | HIGH PURITY DIPHENYL SULFONE, PREPARATION AND USE THEREOF FOR THE PREPARATION OF A POLY(ARYLETHERKETONE) - The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone. | 08-07-2014 |
20140323765 | Process for Manufacturing Haloaryl Compounds From Mixtures of Isomers of Dihalodiarylsulfone - A process for the manufacture of a haloaryl compound which comprises contacting a mixture of dihalodiarylsulfone isomers [mixture (M)] with sulfuric acid to provide a mixture of haloarylsulfonic acid isomers [mixture (M1)] and reacting mixture (M1) in the presence of water. The process is independent on the manufacturing process of mixture (M) and is advantageous in that the obtained haloaryl compound can be recycled to the first step of a dihalodiarylsulfone manufacturing process. | 10-30-2014 |