composition, method for manufacturing a composite, paper or cardboard substrate and product

COMPOSITION, METHOD FOR PRODUCING A COMPOSITION, SUBSTRATE PAPER OR CARDBOARD AND ARTICLE. The present invention relates to compositions containing expandable microspheres and at least one ionic compound and having a zeta potential that is greater than or equal to zero mV at a pH of about 9.0 or less at an ionic strength of 10 ^ -6 0 ^ M, LM, as well as methods for making and using the composition.