EP 0000832 A1 19790221 - Melt processable resorcinol-phthalate polyesters and process for their preparation.
Title (en)
Melt processable resorcinol-phthalate polyesters and process for their preparation.
Title (de)
Verfahren zur Herstellung von in der Schmelz verarbeitbaren Resorcinphthalatpolyestern.
Title (fr)
Procédé de préparation de phthalates de polyrésorcinol se prêtant au façonnage à l'état fondu.
Publication
Application
Priority
US 82257977 A 19770808
Abstract (en)
A melt processable resorcinol phthalate polyester having a terephthalic acid content not greater than about 30 mole percent is prepared by a two-stage process utilizing an alkali or alkaline earth metal acetate catalyst. The first stage yields a non-volatile pre-polymer which is then melt polymerized to the resorcinol phthalate polyester. A process for preparing a melt processable resorcinol phthalate polyester from resorcinol by reacting it with an acetylating agent is also disclosed. The resulting polyester exhibits high char and low flammability in addition to being melt processable.
IPC 1-7
IPC 8 full level
C08G 63/19 (2006.01); C08G 63/83 (2006.01)
CPC (source: EP US)
C08G 63/19 (2013.01 - EP US); C08G 63/83 (2013.01 - EP US)
Citation (search report)
- [X] US 3161710 A 19641215 - TURNER GILBERT M
- US 3216970 A 19651109 - JAN CONIX ANDRE
- US 3271365 A 19660906 - PARHAM FRED M
- US 3948856 A 19760406 - STACKMAN ROBERT W
- US 3428587 A 19690218 - PIIRMA ALEKSANDER
- DE 2035846 A1 19720316 - DYNAMIT NOBEL AG
- [A] US 3036990 A 19620529 - KANTOR SIMON W, et al
- BEILSTEINS HANDBUCH DER ORGANISCHEN CHEMIE, 4. Auflage, 3. Ergänzungswerk, Band VI, 1967, Springer-Verlag, Berlin, Heidelberg, New York, Page 4320
Designated contracting state (EPC)
BE CH DE FR GB LU NL SE
DOCDB simple family (publication)
US 4127560 A 19781128; DE 2862370 D1 19840308; EP 0000832 A1 19790221; EP 0000832 B1 19840201
DOCDB simple family (application)
US 82257977 A 19770808; DE 2862370 T 19780803; EP 78300244 A 19780803