Title (en)

Chemical pulping process

Title (de)

Chemisches Aufschlu verfahren

Title (fr)

Procédé chimique de réduction en pâte

Publication

EP 0957198 A1 19991117 (EN)

Application

EP 99303531 A 19990505

Priority

US 7641398 A 19980512

Abstract (en)

The present invention claims the use of an oxyalkylene-modified organopolysiloxane, in combination with an alkylated sulfonated diphenyloxide surfactant, as chemical pulping additives. These pulping additives surprisingly improve the physical properties of wood pulp and products produced therefrom.

IPC 1-7

D21C 3/00

IPC 8 full level

D21C 3/00 (2006.01); D21C 3/22 (2006.01)

CPC (source: EP)

D21C 3/003 (2013.01); D21C 3/222 (2013.01)

Citation (search report)

• [DYA] DE 4440186 A1 19960515 - WACKER CHEMIE GMBH [DE]
• [DYA] WO 9641915 A1 19961227 - HENKEL CORP [US]
• [DYA] US 3147179 A 19640901 - SIMMONS WILLIAM B, et al
• [DYA] US 5464502 A 19951107 - PEASE JACQUELINE K [US]
• [DA] US 5250152 A 19931005 - LING TIEN-FENG [US], et al
• [A] US 5728265 A 19980317 - SAINT VICTOR MARIE-ESTHER [US], et al
• [A] WO 9205854 A1 19920416 - WACKER CHEMIE GMBH [DE]

Designated contracting state (EPC)

DE FI FR GB SE

DOCDB simple family (publication)

EP 0957198 A1 19991117; AU 2803599 A 19991118; CA 2271900 A1 19991112; ID 23328 A 20000405; JP H11335989 A 19991207; NO 992021 D0 19990428; NO 992021 L 19991115

DOCDB simple family (application)

EP 99303531 A 19990505; AU 2803599 A 19990511; CA 2271900 A 19990511; ID 990428 A 19990507; JP 13162499 A 19990512; NO 992021 A 19990428