Cellulosic materials internally sized with ammoniated acid copolymers and epihalohydrin/alkylamine reaction products
US4181566A · kind A · utility
13Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1976 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | May 7, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/66
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Cellulosic materials such as paper are internally sized by treating fibers of the cellulosic material, e.g., paper pulp, with a copolymer of an .alpha.,.beta.-ethylenically unsaturated hydrophobic monomer and an ammoniated .alpha.,.beta.-ethylenically unsaturated carboxylic acid and a reaction product of epihalohydrin and alkylamine. Internal sizing of the cellulosic material by this method can be carried out over complete range of pH and is not adversely affected by the presence of contaminants such as alum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.