US 5,688,482 A · Temperature-activated polysilicic acids and their use in paper production processes

Abstract

A temperature-activated polysilicic acid is prepared by heating an acidified aqueous alkali metal silicate. The temperature-activated polysilicic acid is used in the production of paper for improvement of retention and water removal.

Claims13

Dependent claims

A temperature-activated polysilicic acid prepared by heating an acidified aqueous alkali metal silicate.

Dependencies are inferred from the claim text.

Facts

Application

08/682,465Filed 17 Jul 1996 · division

Priority

20 Jan 1995

Granted

18 Nov 1997

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

D21H 21/10
Paper forming aids: retention agents or drainage improvers
C01B 33/143
By acidic treatment of silicates: of aqueous solutions of silicates
C01B 33/1435
Of aqueous solutions of silicates: using ion exchangers
D21H 17/68
Water-insoluble compounds, e.g. fillers, pigments: siliceous, e.g. clays

Temperature-activated polysilicic acids and their use in paper production processes

Life of this patent

Abstract

Claims13

Temperature-activated polysilicic acids and their use in paper production processes

Life of this patent

Abstract

Claims13