초록 ▼

In a papermaking process, improved drainage and retention are obtained when ionic, organic microbeads of less than about 1,000 nm in diameter if crosslinked or less about than 60 nm in diameter if noncrosslinked are added either alone or in combination with a high molecular weight organic polymer, a

In a papermaking process, improved drainage and retention are obtained when ionic, organic microbeads of less than about 1,000 nm in diameter if crosslinked or less about than 60 nm in diameter if noncrosslinked are added either alone or in combination with a high molecular weight organic polymer, and/or polysaccharide. Further addition of alum enhances drainage formation and retention properties in papermaking stock with and without the present of other additives used in papermaking processes.

대표청구항 ▼

A composition of matter comprising a mixture of A) an ionic, organic, polymer microbead being less than about 750 nanometers in diameter if cross-linked and less than about 60 nanometers in diameter if non-cross-linked and water-insoluble, the ionicity of the microbead being at least about 1% and ei

A composition of matter comprising a mixture of A) an ionic, organic, polymer microbead being less than about 750 nanometers in diameter if cross-linked and less than about 60 nanometers in diameter if non-cross-linked and water-insoluble, the ionicity of the microbead being at least about 1% and either B) a high molecular weight ionic polymer, the ratio of A:B ranging from about 1:400 to about 400:1, respectively, or C) in ionic polysaccharide, the ratio of A:C ranging from about 20:1 to about 1:1000 or B and C together, the ratio if A:B and C together ranging from about 400:1 to about 1:1000.