Global Patent Index - EP 0000790 A1

EP 0000790 A1 19790221 - Process for the production of phosphazene polymers.

Title (en)

Process for the production of phosphazene polymers.

Title (de)

Verfahren zur Herstellung von Polyphosphazenen.

Title (fr)

Procédé de préparation de polyphosphazènes.

Publication

EP 0000790 A1 19790221 (EN)

Application

EP 78100652 A 19780812

Priority

US 82400477 A 19770812

Abstract (en)

[origin: US4129529A] {PG,1 The production of phosphazene polymers represented by the general formula {r1 {tc,1 {rb {ab,44 {m,1 {sb,21 {us,5 {ob,4 {mr,1 P{M,1 {AB,2 OR{MR,1 {AB,6 OR{40 {MR,1 {AD,44 N{AB,44 {SB,21 {US,5 {CB,4 {S,6 {BL,88 {HD n{re {PS {PS WHEREIN N IS AN INTEGER FROM 7 TO UPWARDS OF 50,000 WHEREIN ONE OR MORE KINDS OF OR or OR{40 {0 groups is attached to the phosphorus atoms in a substantially linear chain of alternating P and N atoms, the groups when more than one group is present being randomly distributed along the PN backbone, is enhanced by employing a single solvent for both each of the reactants (polydihalophosphazene and either aryloxide and/or alkoxide) and for the product (phosphazene polymer). By this expedient, the formation of the desired product is achieved in a homogeneous system rather than in a heterogeneous system as in the prior art where different solvents were employed for each of the reactants and for the reaction products.

IPC 1-7

C08G 79/02

IPC 8 full level

C08G 79/02 (2006.01)

CPC (source: EP US)

C08G 79/025 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB NL

DOCDB simple family (publication)

US 4129529 A 19781212; CA 1098534 A 19810331; DE 2862358 D1 19840209; EP 0000790 A1 19790221; EP 0000790 B1 19840104

DOCDB simple family (application)

US 82400477 A 19770812; CA 309273 A 19780814; DE 2862358 T 19780812; EP 78100652 A 19780812