Process for producing low-viscosity starch dispersions
AssigneeHuels Aktiengesellschaft
InventorKlaus Heidel
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the production of low-viscosity, aqueous dispersions of gelatinized, starches, and to dispersions produced thereby. The viscosity is considerably reduced by adding a nonionic tenside from the group of unilaterally etherified polyoxyalkylene glycols, so that up to 50% strength, stirrable dispersions of gelatinized starch can be produced.
Claims13
In a process for producing an aqueous starch dispersion comprising mixing starch and water to form a mixture of water and discrete unpasted, gelatinized starch granules, and heating and homogenizing the resultant mixture,
- the improvement comprising adding to the mixture a tenside of the formula
- R--(O--CH.sub.2 --CH.sub.2).sub.n --OH
- wherein R is alkyl or alkenyl of 6-20 carbon atoms, and n is 3 to 30,
- in an amount whereby the temperature at which the mixture otherwise pastes is increased.
A method of raising the temperature at which an aqueous starch dispersion pastes, comprising adding to an unpasted aqueous starch dispersion an amount of a tenside of the formula
- R--(O--CH.sub.2 --CH.sub.2).sub.n --OH
- wherein R is alkyl or alkenyl of 6-20 carbon atoms, and n is 3 to 30,
- effective to raise the pasting temprature of the dispersion.
In a process for the preparation of an unpasted aqueous starch dispersion for subsequent chemical modification, said process comprising mixing starch in water to form a mixture and heating and homogenizing the resultant mixture, the improvement wherein a tenside of a formula
- R--(O--CH.sub.2 --CH.sub.2).sub.n --OH
- wherein R is alkyl of 8-15 carbon atoms, and n is 3-30,
- is added to the mixture in an amount effective to increase the temperature at which the mixture will paste.
Dependencies are inferred from the claim text.