Method for the cationisation of legume starches, cationic starches thus obtained applications thereof
A novel solvent-free method for the cationization of a legume starch, and uses of the cationic starches thus obtained, in aqueous compositions and the paper industry, including the folding carton or paper thus obtained.
1. A method for the manufacture of folding cardboard or paper, comprising the steps:
selecting a paper-making machine;
selecting a pulp;
selecting at least one additive comprising at least one pea-derived cationic starch having a nitrogen level of between 0.5 and 4% and an amylose content of 30% to 60%;
preparing folding cardboard or paper from said pulp on said paper-making machine, utilizing said additive; and
collecting said folding cardboard or paper.
2. The method as claimed in claim 1 , wherein the pea derived cationic starch has a nitrogen level of between 0.5 and 2%.
3. The method as claimed in claim 1 , wherein the pea derived cationic starch has a nitrogen level of between 0.5 and 1.8%.
4. The method as claimed in claim 1 , wherein the pea derived cationic starch has a nitrogen level of between 0.5 and 1.5%.
5. The method as claimed in claim 1 , wherein the pea derived cationic starch is cross-linked.
6. The method as claimed in claim 1 , wherein the pea derived cationic starch is amphoteric.
7. The method as claimed in claim 1 , wherein the pea derived cationic starch is obtained by a method for the cationization of a pea-derived starch, comprising the reaction of said pea-derived starch, in a granular or gelatinized form, with a cationic reagent, wherein the reaction is carried out in the sole presence of water, and in the complete absence of any other solvent compound, under conditions such that the ratio R of the quantity of water to the quantity of said pea-derived starch is between 1/1000 and 10/1, and said pea-derived starch comprises an amylose content of 30% to 60%.