Use of starch dispersions as binder in coating compositions and process for preparing the starch dispersions
US7285586B2 · kind B2 · utility
27Cited by
6References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 3, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Apr 8, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H19/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coating compositions comprising a pigment and starch dispersion of discrete crosslinked starch particles in an aqueous liquid. The dispersion may be used as coating color for paper. A preferred process of preparing the dispersion of starch particles comprises (a) obtaining a mixture of starch and an aqueous liquid; (b) processing the mixture using shear forces in the presence of a crosslinker in an extruder; and (c) injecting a hydroxylic liquid into the extruder and dispersing the mixture inside the extruder or outside the extruder or both inside and outside the extruder to obtain the dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.