Paper manufacture with improved retention agents
AssigneeSandoz Ltd.
InventorsJean-Pierre Carrard, Helmut Pummer
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Abstract
DISCLOSED is a process for the production of paper and paper-like products which comprises the step of incorporating in the pulp a retention agent comprising a polyalkylene oxide of molecular weight in excess of 1 million and a phenol- or naphthol-formaldehyde or -sulphur resin.
Claims9
A process for the production of paper and paper-like products which comprises the step of incorporating in the pulp a retention agent comprising a polyalkylene oxide of molecular weight in excess of 1 million and a water soluble resin selected from the group consisting of phenol - or naphthol formaldehyde containing sulfonic acid and/or sulfone groups and phenol - or naphthol sulfur resin, said resin being employed in an amount of from 0.01 to 0.5% by weight based on the weight of solids in said pulp.
Dependencies are inferred from the claim text.