Patent · US Expired

Silica sols and use of the sols

US5603805A · kind A · utility

57Cited by

18References

17Claims

0Family size

Assignee

Eka Nobel AB · SE

Inventors

Kjell Andersson · Bissenkamp, SE
Bo V. Larsson · Partille, SE
Erik Lindgren · Bohus, SE

Key dates

Filing date	Feb 3, 1995
Grant date	Feb 18, 1997
Priority date	—
Expiry date	Feb 3, 2015

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/45
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Silica sols with a high content of microgel and particles with a specific surface area within the range 300 to 700 m.sup.2 /g, preferably 400 to 650 m.sup.2 /g. The sols can be prepared by acidification or a water glass solution and alkalization at a certain dry content, alternatively to a certain pH. The sols are particularly suitable for use as additives in papermaking in combination with cationic polymers and especially in combination with cationic acrylamide based polymers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.