Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2005-07-25
2009-12-01
Eashoo, Mark (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S451000, C162S158000, C162S175000, C162S181100
Reexamination Certificate
active
07625962
ABSTRACT:
A novel filler treatment comprising the preparation of swollen starch-latex compositions, prepared in the presence or absence of co-additives, and the addition of the said composition to a filler suspension, has been developed. Use of the treated filler during papermaking improves filler retention and produces filled papers where addition of the filler has only a minimal negative effect on strength properties. The swollen starch-latex compositions can be prepared in a batch or jet cooker, or by mixing with hot water under controlled conditions (i.e., temperature, pH, mixing, mixing time) in order to make the starch granules swell sufficiently to improve their properties as a filler additive but avoiding excess swelling leading to their rupture. The swollen starch-latex composition is then rapidly mixed with the filler slurry, preferably in a static mixer, and added to the papermaking furnish at a point prior to the headbox of the paper machine. The starch-latex composition can be used with wood-free or wood-containing furnishes. The treated filler is easily retained in the web during papermaking, improves drainage, and gives sheets having good formation. Sheets made with the treated fillers have higher bonding and tensile strengths than sheets produced using filler treated with either swollen starch alone or latex alone. Retention and drainage are further improved when conventional retention aid chemicals are added to the furnish containing the treated filler. The use of swollen starch-latex compositions could allow the papermaker to increase the filler content of the paper without sacrificing dry strength properties or increasing the amount, and hence the cost, of the retention aid added. The combination of swollen starch and latex could be used as furnish additives in the manufacture of both filled grades and grades that contain no filler such as sack papers and paperboard products.
REFERENCES:
patent: 2730468 (1956-01-01), Martin
patent: 2919214 (1959-12-01), Etheridge
patent: 2940876 (1960-06-01), Elsas
patent: 2980576 (1961-04-01), Etheridge
patent: 4104213 (1978-08-01), Chiang et al.
patent: 4256771 (1981-03-01), Henderson et al.
patent: 4750974 (1988-06-01), Johnson
patent: 4925530 (1990-05-01), Sinclair et al.
patent: 5122231 (1992-06-01), Anderson
patent: 5437169 (1995-08-01), Mitchell et al.
patent: 5439558 (1995-08-01), Bergmann et al.
patent: 5620510 (1997-04-01), Mentzer et al.
patent: 5680663 (1997-10-01), Mitchell et al.
patent: 5690787 (1997-11-01), Hultman et al.
patent: 5695609 (1997-12-01), Petander et al.
patent: 5759346 (1998-06-01), Vinson
patent: 5883242 (1999-03-01), Kubota et al.
patent: 5901584 (1999-05-01), Mitchell et al.
patent: 5942087 (1999-08-01), Pruszynski
patent: 6048438 (2000-04-01), Rosencrance et al.
patent: 6146494 (2000-11-01), Seger et al.
patent: 6217709 (2001-04-01), Burnfield
patent: 6303000 (2001-10-01), Floyd et al.
patent: 6365002 (2002-04-01), Bindzus et al.
patent: 6375799 (2002-04-01), Halmschlager et al.
patent: 6391156 (2002-05-01), Hjalmarson et al.
patent: 6413372 (2002-07-01), Maliczyszyn et al.
patent: 6455661 (2002-09-01), Antal et al.
patent: 6475341 (2002-11-01), Johnston et al.
patent: 6507966 (2003-01-01), Mitchell et al.
patent: 6514384 (2003-02-01), Jewell et al.
patent: 6524440 (2003-02-01), Anderson et al.
patent: 6843888 (2005-01-01), Merrette et al.
patent: 6936109 (2005-08-01), Grull et al.
patent: 6939609 (2005-09-01), Silenius
patent: 7011729 (2006-03-01), Strong et al.
patent: 7025821 (2006-04-01), Mackey et al.
patent: 7045563 (2006-05-01), Luukkonen
patent: 2003/0094252 (2003-05-01), Sundar et al.
patent: 2003/0121632 (2003-07-01), Nurminen et al.
patent: 2003/0127209 (2003-07-01), Sandberg et al.
patent: 2003/0155091 (2003-08-01), Coffey et al.
patent: 2003/0173045 (2003-09-01), Confalone et al.
patent: 2004/0025744 (2004-02-01), Glittenberg et al.
patent: 2004/0054037 (2004-03-01), Abbeele van den et al.
patent: 2004/0112559 (2004-06-01), Du Bourg et al.
patent: 2004/0171719 (2004-09-01), Neivandt et al.
patent: 0 032 296 (1981-07-01), None
patent: 0 924 341 (1999-06-01), None
patent: 1 220 962 (2002-07-01), None
patent: WO 97/11226 (1997-03-01), None
patent: WO 9746591 (1997-12-01), None
Eashoo Mark
FI Fpinnovations
Heincer Liam J
Ogilvy Renault LLP
LandOfFree
Swollen starch-latex compositions for use in papermaking does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Swollen starch-latex compositions for use in papermaking, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Swollen starch-latex compositions for use in papermaking will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4097762