Patent · US Active

Composition and method for manufacture of paper, board or the like

US12338579B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

KEMIRA OYJ · FI

Inventors

Kimmo Strengell · Vaasa, FI
Asko Karppi · Turku, FI

Key dates

Filing date	Mar 4, 2021
Grant date	Jun 24, 2025
Priority date	—
Expiry date	Oct 8, 2041

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H23/04
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a composition and method for manufacture of paper, board, tissue or the like. The composition comprises an amphoteric polymer component, which has a weight average molecular weight of at least 600 000 g/mol, preferably at least 1 000 000 g/mol, more preferably at least 2 000 000 g/mol, and at least one synthetic cationic polymer component, which is a copolymer of a polyamidoamine and has a weight average molecular weight ≤550 000 g/mol, preferably ≤500 000 g/mol, more preferably ≤400 000 g/mol and dispersity index more than 15, preferably more than 20, more preferably more than 25.

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