Global patent index - EP 0986536 A1

EP 0986536 A1 2000-03-22 - METHOD FOR THE PREPARATION OF ORGANIC ISOCYANATES

Title (en)

METHOD FOR THE PREPARATION OF ORGANIC ISOCYANATES

Title (de)

VERFAHREN ZUR HERSTELLUNG VON ORGANISCHEN ISOCYANATEN

Title (fr)

PROCEDE DE PREPARATION D'ISOCYANATES ORGANIQUES

Publication

EP 0986536 A1 (EN)

Application

EP 98925567 A

Priority

  • EP 98925567 A
  • EP 9802734 W
  • EP 97201626 A

Abstract (en)

[origin: WO9854129A1] Method for the preparation of polymeric isocyanates by decomposing polymeric ureas of the formula: R<1>(NHCONR<2>R<3>)x wherein x is at least 2, R<1> is an organic radical of valency x and R<2> and R<3> are monovalent organic radicals, into polymeric isocyanates of the formula: R<1>(NCO)x and secondary amines of the formula: R<2>NHR<3> characterised in that at least one of the radicals R<2> and R<3> is bound to the nitrogen atom of the amine by a tertiary carbon atom.

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

C07C 263/06; C08G 18/70

IPC 8 full level (invention and additional information)

C07C 263/06 (2006.01); C08G 18/70 (2006.01); C07C 265/12 (2006.01)

CPC (invention and additional information)

C07C 263/06 (2013.01)

Combination set (CPC)

C07C 263/06 + C07C 265/12

Citation (search report)

See references of WO 9854129A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB IE IT LI LU NL PT SE

EPO simple patent family

WO 9854129 A1 19981203; AU 7763498 A 19981230; EP 0986536 A1 20000322; ZA 9804489 B 19981130

INPADOC legal status

2003-06-25 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20021203

2001-04-11 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: HUNTSMAN INTERNATIONAL LLC

- Ref Legal Event Code: RAP1

2000-06-07 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000410

2000-03-22 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB IE IT LI LU NL PT SE