Aqueous dispersed solution of substituted succinic anhydride and process for producing the same
US4882087A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Jun 30, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/375
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An aqueous dispersed solution of a substituted succinic anhydride which comprises an aqueous soluble copolymer (A) having 50 percent or more by mol of (meth)acrylamide (a) 1 percent or more by mol of N,N-dialkylamino.alkyl(meth)acrylamide (b) as monomer ingredients, aqueous soluble copolymer (B) having 50 percent or more by mol of (meth)acrylamide (a), 1 percent or more by mol of N,N-dialkylamino.alkyl(metho)acrylamide (b) and 49 percent or less by mol of other copolymer monomer (c) as monomer ingredients, or both of the dqueous soluble copolymer (A) and the aqueous soluble copolymer (B), and a process for producing an aqueous dispersed solution of a substituted succinic anhydride prepared by dispersing the aqueous soluble copolymer (A) or the aqueous soluble copolymer (B) or a mixture (C) of 99 to 99.9 percent by weight of the substituted succinic anhydride (d) and 10 to 0.1 percent by weight of an oil-in-water type surfactant (e) in aqueous solution containing both the aqueous soluble copolymer (A) and the aqueous soluble copolymer (B). Thus, the aqueous dispersion can provide an excellent sizing effect in case applied as a sizing agent in paper making process but also hs prefera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.