New aromatic poly:ether-ketone polymers with end gps. - prepd. by reaction of aromatic di:hydroxy cpds. and di:halo cpds. with keto gps

• Main Authors: KERN, SABINE. DR., 4130 MOERS, DE, IDEL, KARSTEN-JOSEF. DR., 4150 KREFELD, DE, WESTEPPE, UWE. DR., 4020 METTMANN, DE, WEYMANS, GUENTHER. DR., 5090 LEVERKUSEN, DE
• Format: Patent
• Language: English; German
• Published: 29.05.1991
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Aromatic polyether ketones (I) with ends gps. from chemical cpds. which as polymers, characterised by critical mol. wt. Mc, have in the melt a low entangling density are claimed. Entangling density of polymers in melt can be described through mol. wt. of chain segment between two loops of the chain in the melt; entangling density is very high if Mc (S.M. Aharoni, Macromolecules 1986, 19, 426 et seq.) is small; polymers employed for the modification have Mc at least 15,000, esp. more than 30,000, g/mol.. Prepn. of (I) by reaction of aromatic dihydroxy cpds. and aromatic dihalo cpds. with keto gps. and/or aromatic monohalo-monohydroxy cpd. contg. keto gps. in polar solvents in presence of end gps. with low entangling. USE/ADVANTAGE - Opt. in admixture with other polymers and/or additives, for prepn. of shaped articles (claimed). (I) have increased flowability, facilitating filling moulds and preventing surface inhomogeneities in prepn. of complicated mouldings.