Paper auxiliary from condensation product of aliphatic polyol-ether-amine and compound polyfunctional toward amino groups
US4673729A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Mar 29, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/82
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to agents for increasing the retention of fibres, fillers and pigments and for accelerating drainage in papermaking, and as flocculating agents in the working up of effluents from papermaking by filtration, sedimentation and flotation. They are characterized in that they contain, as active components, one or more nitrogen-containing condensation products which can be obtained by reacting (A) aliphatic polyol-ether-amines which are free from halogen groups, contain cohesive polyether segments and carry no amino groups within these segments, with (B) compounds which are polyfunctional towards amino groups, optionally in the presence of (C) polyaminopolyamides and/or (D) polyalkylenepolyamines, component (B) being employed in an amount such that water-soluble polycondensates which have a viscosity of 100 to 1,000 mPa.s at 25.degree. C. in 25% strength aqueous solution are formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.