EP 0359590 A3 19911127 - CONTROLLING DEPOSITS ON PAPER MACHINE FELTS AND THE LIKE
Title (en)
CONTROLLING DEPOSITS ON PAPER MACHINE FELTS AND THE LIKE
Publication
Application
Priority
- US 24585288 A 19880916
- US 32359789 A 19890314
Abstract (en)
[origin: EP0359590A2] A method is disclosed for treating papermill felts and the like to inhibit the deposit of sticky material thereon. The method comprises (a) applying an aqueous solution which contains at least about 2 ppm of a cationic polymer; and (b) applying an aqueous solution which contains at least one compound selected from the group consisting of water soluble nonionic and cationic surfactants; the surfactant being applied in an amount effective to inhibit build-up of deposits derived from the cationic polymer. Cationic surfactants are preferred. Particular use is disclosed of water soluble surfactants which have a molecular weight between about 200 and 800 and having the general formula: <CHEM> wherein each R is independently selected from the group consisting of hydrogen, polyethylene oxide groups, polypropylene oxide groups, alkyl groups having between about 1 and 22 carbon atoms, aryl groups, and aralkyl groups, at least one of said R groups being an alkyl group having at least about 8 carbon atoms, and wherein X<-> is an anion, or 1/n of an n-valent anion. Compositions comprising said cationic polymers and said surfactants in a weight ratio of surfactant to cationic polymer of from about 50:1 to about 1:1 are disclosed as particularly useful.
IPC 1-7
IPC 8 full level
D06M 13/02 (2006.01); D06M 13/224 (2006.01); D06M 13/322 (2006.01); D06M 13/46 (2006.01); D06M 13/463 (2006.01); D06M 15/00 (2006.01); D21F 7/08 (2006.01); D21H 21/02 (2006.01)
CPC (source: EP)
D21H 21/02 (2013.01)
Citation (search report)
- [A] US 4715931 A 19871229 - SCHELLHAMER ALAN J [US], et al
- [A] US 4190491 A 19800226 - DRENNEN THOMAS J [US], et al
- [A] EP 0232015 A1 19870812 - GRACE W R AB [SE]
- [A] US 3582461 A 19710601 - LIPOWSKI STANLEY A, et al
- [A] TAPPI JOURNAL. vol. 70, no. 10, October 1987, NORCROSS US pages 79 - 85; F.LINHART ET AL.: ""Anionic thrash": controlling detrimental substances."
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0359590 A2 19900321; EP 0359590 A3 19911127; EP 0359590 B1 19940615; AR 247436 A1 19941229; AT E107379 T1 19940715; BR 8904651 A 19900508; CA 1319778 C 19930629; DE 68916140 D1 19940721; DE 68916140 T2 19940922; DK 171279 B1 19960819; DK 455289 A 19900317; DK 455289 D0 19890915; ES 2055085 T3 19940816; FI 894365 A0 19890915; FI 894365 A 19900317; FI 92731 B 19940915; FI 92731 C 19941227; HK 38995 A 19950324; JP 2618496 B2 19970611; JP H02182995 A 19900717; MX 169862 B 19930728; NO 302042 B1 19980112; NO 893704 D0 19890915; NO 893704 L 19900319; SG 14995 G 19950616
DOCDB simple family (application)
EP 89309424 A 19890915; AR 31493489 A 19890914; AT 89309424 T 19890915; BR 8904651 A 19890915; CA 611581 A 19890915; DE 68916140 T 19890915; DK 455289 A 19890915; ES 89309424 T 19890915; FI 894365 A 19890915; HK 38995 A 19950316; JP 23743989 A 19890914; MX 1756689 A 19890915; NO 893704 A 19890915; SG 14995 A 19950127