Sizing agents of enhanced performance capabilities
US6225437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided are alkenyl and/or alkyl succinimides formed from at least one alkenyl or alkyl succinic anhydride and at least one aliphatic amine having one or two primary amino groups in the molecule. These succinimides are characterized in that each alkenyl or alkyl group thereof contains in the range of 16 to 30 carbon atoms. Such group is bifurcated on its alpha carbon atom into two branches neither of which contains less than 2 carbon atoms, one such branch being free of any side chain, and the other such branch either being free of any side chain or containing at most one methyl or methylene side chain. In addition the succinimide has a viscosity at 80.degree. C. of less than about 100 centistokes. These succinimides are especially useful as internal and external sizing agents for paper and paper products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.