EP 0740014 A1 19961030 - Improved pitch control agent
Title (en)
Improved pitch control agent
Title (de)
Verbessertes Pechkontrollemittel
Title (fr)
Agent amélioré pour le contrÔle de la poix
Publication
Application
Priority
GB 9505323 A 19950316
Abstract (en)
A method of controlling the deposition of pitch in a pulping and/or paper making process which comprises adding a pitch control agent to a stream or a slurry of cellulosic fibres is characterised in that the pitch control agent comprises a particulate inorganic material comprising at least one silicon-containing compound whose particles are coated with a nitrogen-containing polymer having one or more triazine rings. The pitch control agent may comprise a kandite clay whose particles are coated with a homo- or co-polymer comprising melamine formaldehyde. The pitch control agent may be added together with particulate filler material to the cellulosic fibres being processed. A method of preparing a suitable pitch control agent is also described comprising mixing an aqueous suspension of a particulate inorganic material comprising at least one silicon-containing compound with a solution containing a nitrogen-containing polymer having one or more triazine rings, the pH of the mixture formed being in the range pH1 to pH7.
IPC 1-7
IPC 8 full level
C09D 161/28 (2006.01); C09D 161/20 (2006.01); D21C 9/08 (2006.01); D21H 17/67 (2006.01); D21H 21/02 (2006.01); D21H 21/50 (2006.01)
CPC (source: EP)
D21C 9/086 (2013.01); D21H 21/02 (2013.01)
Citation (search report)
- [YA] WO 8906294 A1 19890713 - CYPRUS IND MINERALS CORP [US]
- [DY] EP 0569085 A1 19931110 - CALGON CORP [US]
- [DXA] EP 0132132 A2 19850123 - DU PONT [US]
- [A] EP 0349311 A2 19900103 - ECC INT LTD [GB]
Designated contracting state (EPC)
AT BE DE DK ES FI FR GB IT NL PT SE
DOCDB simple family (publication)
EP 0740014 A1 19961030; AU 4805396 A 19960926; AU 706819 B2 19990624; BR 9601042 A 19980106; GB 9505323 D0 19950503; JP H08325987 A 19961210
DOCDB simple family (application)
EP 96301664 A 19960312; AU 4805396 A 19960313; BR 9601042 A 19960318; GB 9505323 A 19950316; JP 10064596 A 19960318