Patent · US Expired

Aqueous dispersions, a process for their preparation and the use of the dispersions as sizing agents

US4816073A · kind A · utility

10Cited by

2References

13Claims

0Family size

Assignee

Casco Nobel AB · SE

Inventors

Ulla Helmer · Solna, SE
Randi Johansen · Bromma, SE
Ulf Carlson · Lindome, SE

Key dates

Filing date	Dec 24, 1987
Grant date	Mar 28, 1989
Priority date	—
Expiry date	Dec 24, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31993
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Aqueous dispersions of rosin and synthetic sizing agent wherein the particles in the dispersed phase contain a mixture of rosin and the synthetic sizing agent and wherein the dispersions contain a polyaluminum compound. The dispersions are prepared by homogenization of a homogenous mixture of rosin material and the synthetic sizing agent and the polyaluminum compound can either be present at the production or be added to an aqueous dispersion of mixed particles. The dispersions are used as sizing agents at the production of paper, paper board, board and similar products.

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