Global Patent Index - EP 1315688 A2

EP 1315688 A2 2003-06-04 - METHOD OF IMPROVING THE CRUSHING STRENGTH AND THE IMPACT RESISTANCE OF UREA, AND UREA COMPOSITION

Title (en)

METHOD OF IMPROVING THE CRUSHING STRENGTH AND THE IMPACT RESISTANCE OF UREA, AND UREA COMPOSITION

Title (de)

VERFAHREN ZUR VERBESSERUNG DER DRUCKFESTIGKEIT UND DER SCHLAGFESTIGKEIT VON HARNSTOFF, UND HARNSTOFFZUSAMMENSETZUNG

Title (fr)

PROCEDE D'AMELIORATION DE LA RESISTANCE A LA COMPRESSION ET DE LA RESISTANCE AU CHOC DE L'UREE, ET COMPOSITION D'UREE

Publication

EP 1315688 A2 (EN)

Application

EP 01975023 A

Priority

  • NL 0100663 W
  • NL 1016123 A

Abstract (en)

[origin: WO0220471A2] The invention relates to a method of improving the crushing strength and impact resistance of urea granules by the addition of an additive comprising a polyvinyl compound of the general formula (CHX-CHY)n, where n = 4-10 000, and X and Y independently of one another are selected from the group consisting of a hydrogen atom, a hydroxyl radical, carboxylic acid radical, amine radical or amide radical. This method is characterized in that it starts with a urea melt.

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

C05C 9/00; C07C 273/14

IPC 8 full level (invention and additional information)

C05C 9/00 (2006.01); C07C 273/14 (2006.01)

CPC (invention and additional information)

C07C 273/14 (2013.01); C05C 9/005 (2013.01)

Citation (search report)

See references of WO 0220471A3

Designated contracting state (EPC)

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

EPO simple patent family

WO 0220471 A2 20020314; WO 0220471 A3 20020808; AU 9439201 A 20020322; EP 1315688 A2 20030604

INPADOC legal status


2008-10-22 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20080415

2003-06-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030304

2003-06-04 [AK] DESIGNATED CONTRACTING STATES:

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

2003-06-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI