摘要:
An aqueous dispersion comprises: (A) water; (B) a polymeric material of a type which includes: (a) phenyl moieties; (b) carbonyl and/or sulphone moieties; and (c) ether and/or thioether moieties; (C) a surface active agent which includes a carbonyl or sulphone moiety and a hydrophilic group. Preferred embodiments relate to polyketones in combination with surfactants which are alkyl sulphosuccinates.
摘要:
A polyaryletherketone polymeric material, for example polyetheretherketone and composite materials comprising said polymeric material are described. The polymeric material has a melt viscosity (MV) in the range 0.05 to 0.12 kNsm−2, preferably in the range 0.085 to 0.095 kNsm−2.
摘要:
The invention relates to polyetherketones and to a process for the preparation of aromatic polyetherketones which process comprises: a) self-condensing a compound of formula (I) wherein n represents 0 or 1 in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or b) condensing a compound of general formula (II) and a compound of general formula (III) wherein p and q independently represent 0 or 1, in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or c) a combination of a) and b)