Sulfonated phenol-formaldehyde resin for paper-making
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 2, 1999
Grant Date -
N/A
app pub date -
May 29, 1997
filing date -
Jan 9, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for the improvement of yield and freeness which does not discolor the paper product and gives a long life to the product and exerts stable yield improving effect even for the paper stuff containing much deinked pulp and filler as well as a yield improving promotor used in this method are provided. In the method for the improvement of yield and freeness in the paper-making process and the waste water treating process according to the present invention, a special phenol resin is used in combination with polyethylene oxide (PEO). The phenol resin of the present invention is a sulfonated phenol-formaldehyde resin synthesized by sulfonating a phenol and then condensing it with formaldehyde. Preferred as the phenol to be sulfonated are Bisphenol A and Bisphenol S. By using the method of the present invention, the yields of fine fiber and filler can be improved and the paper stuffs can be saved and the waste water treating load can be decreased.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully