Global patent index - EP 0971935 A1

EP 0971935 A1 2000-01-19 - PROCESS FOR MAKING AND USING BISARYL DIPHOSPHATES

Title (en)

PROCESS FOR MAKING AND USING BISARYL DIPHOSPHATES

Title (de)

VERFAHREN ZUR HERSTELLUNG UND VERWENDUNG VON BISARYLDIPHOSPHATEN

Title (fr)

PROCEDE DE FABRICATION ET D'UTILISATION DE BISARYL-DIPHOSPHATES

Publication

EP 0971935 A1 (EN)

Application

EP 98906465 A

Priority

  • US 9802968 W
  • US 3873497 P

Abstract (en)

[origin: WO9835970A1] Flame retardancy is provided to polymer resins by adding to the resin a bisaryl diphosphate that has not been purified to remove catalyst or catalyst residue from the product. The bisaryl diphosphate may be prepared by a two-step process that starts with the semi-continuous addition of dry bisphenol A to a heated mixture of phosphorous oxychloride and MgCl, and concludes with the addition of dry phenol to the step one intermediate.

IPC 1-7 (main, further and additional classification)

C07F 9/02; C08K 5/52

IPC 8 full level (invention and additional information)

C09K 21/14 (2006.01); C07F 9/12 (2006.01); C08K 5/521 (2006.01); C08K 5/523 (2006.01); C08L 101/00 (2006.01)

CPC (invention and additional information)

C08K 5/523 (2013.01); C07F 9/12 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB NL

EPO simple patent family

WO 9835970 A1 19980820; BR 9808644 A 20000523; CA 2281106 A1 19980820; CN 1252073 A 20000503; EP 0971935 A1 20000119; EP 0971935 A4 20000419; IL 131379 D0 20010128; JP 2001512510 A 20010821; KR 20000071089 A 20001125

INPADOC legal status

2001-03-28 [18W] WITHDRAWN

- Date of withdrawal: 20010125

2000-04-19 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20000303

2000-04-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): BE DE FR GB NL

2000-01-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990812

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB NL