Patent · US Expired

Papermaking and products made thereby

US4388150A · kind A · utility

159Cited by

8References

37Claims

0Family size

Assignee

EKA Limited · SE

Inventors

Olof Sunden · Lidingö, SE
Per G. Batelson · Honeytree Loop East, SE
Hans Johansson · Gothenburg, SE
Hans M. Larsson · Lausanne, CH
Per Svending · Kungälv, SE

Key dates

Filing date	Feb 26, 1981
Grant date	Jun 14, 1983
Priority date	—
Expiry date	Feb 26, 2001

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H23/765
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In making paper from an aqueous papermaking stock a binder comprising colloidal silicic acid and cationic starch is added to the stock for improving the paper or the retention of the stock components, or is added to the white water for reducing the pollution problems or recovering values from the white water. The cationic starch of the binder has a degree of substitution of not less than 0.01, and the weight ratio of cationic starch to SiO.sub.2 is between 1:1 and 25:1.

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