Patent ID: 7288580
Filing Date: 2007-10-30
Classification: C04B

Abstract:
1. A setting accelerant and water-redispersible polymer powder composition which accelerates the setting of hydraulically settable cementitious compositions, comprising an admixture of the separate components a) one or more water-redispersible polymers prepared by polymerizing a monomer mixture consisting of b) from 0.1 to 25 weight percent of at least one alkanolamine-functional setting accelerant selected from the group consisting of NR said redispersible polymer powder composition further comprising c) at least one protective colloid, d) optionally one or more antiblocking agent(s), and wherein said composition is prepared by adding said accelerant to an aqueous dispersion of protective colloid-containing after polymer polymerization is completed and spray drying the composition, or the polymer is spray dried in the form of an aqueous dispersion in the presence of a protective colloid to form a redispersible polymer powder, and the accelerant is admixed in powder form with the redispersible polymer powder.