| Patent Number |
Title Of Patent |
Date Issued |
| T993005 |
Preparation of aromatic fluoro compounds |
April 1, 1980 |
| The present invention relates to a process for the preparation of 4,4'-difluorobenzophenone. 4,4-difluorobenzophenone may be prepared by diazotization of 4,4'-diamino-diphenylmethane in anhydrous or concentrated aqueous hydrogen fluoride, decomposition of the diazonium fluoride thus |
| RE34085 |
Thermoplastic aromatic polyetherketones |
September 29, 1992 |
| Tough crystalline thermoplastic aromatic polyetherketones containing the repeat units ##STR1## alone or in conjunction with other repeat units especially ##STR2## and having an inherent viscosity IV of at least 0.7, preferably at least 0.8. The polymers may be made by condens |
| 4541884 |
Method of producing fibre-reinforced composition |
September 17, 1985 |
| A process of producing a fibre-reinforced composition comprising drawing a plurality of continuous filaments through a melt comprising a mixture of a thermoplastic polymer and a plasticizer for the polymer in the weight ratio between 1:4 and 99:1 of polymer to plasticizer, preferably in |
| 4453010 |
Production of hydroxy arylophenones |
June 5, 1984 |
| Production of a hydroxy arylophenone by reacting an aromatic carboxylic acid Ar(--CO.sub.2 H).sub.p where Ar is an aromatic radical, (--CO.sub.2 H) is an aromatic carboxylic acid group, and p is 1 or 2 with an aromatic compound H--Ar'--OH where Ar' is an aromatic radical and --H and --OH |
| 4331798 |
Production of aromatic polyethers with infusible particulate substance |
May 25, 1982 |
| Production of aromatic polyethers by reacting (i) a mixture of a bisphenol and a dihalobenzenoid compound or (ii) a halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by ortho or para --SO.sub.2 -- or --CO-- groups, with an alkali metal (bi)ca |
| 4320224 |
Thermoplastic aromatic polyetherketones |
March 16, 1982 |
| Tough crystalline thermoplastic aromatic polyetherketones containing the repeat units ##STR1## alone or in conjunction with other repeat units especially ##STR2## and having an inherent viscosity IV of at least 0.7, preferably at least 0.8. The polymers may be made by condens |
