公开(公告)号：US11685696B2

公开(公告)日：2023-06-27

申请号：US16620361

申请日：2018-06-06

Applicant: BASF SE

Inventor： Christian Schmidtke ,  Ekkehard Jahns ,  Torben Gaedt ,  Martin Winklbauer ,  Klaus Seip ,  Iris Loescher

IPC: C04B40/00 ,  C04B26/06 ,  C04B103/00 ,  C04B111/00 ,  C04B111/62 ,  C04B111/70 ,  C04B111/72

CPC classification number: C04B40/0042 ,  C04B26/06 ,  C04B40/0046 ,  C04B2103/0057 ,  C04B2111/00482 ,  C04B2111/00637 ,  C04B2111/00672 ,  C04B2111/62 ,  C04B2111/70 ,  C04B2111/72

Abstract: The present invention relates to a process for producing a redispersible dispersion powder, to the redispersible dispersion powder obtainable by this process, to an aqueous dispersion obtainable by step (1) of this process, and to a building material composition comprising the redispersible dispersion powder and/or the aqueous dispersion, to the use of the redispersible dispersion powder in a building material composition and to the use of the aqueous dispersion for production of a redispersible dispersion powder.

公开(公告)号：US10927224B2

公开(公告)日：2021-02-23

申请号：US16093437

申请日：2017-04-10

Applicant: BASF SE

Inventor： Gerhard Albrecht ,  Sophie Putzien ,  Torben Gaedt ,  Michael Dietzsch ,  Harald Grassl ,  Iris Loescher ,  Luc Nicoleau

IPC: C08K3/08 ,  C08J3/12 ,  C04B40/00 ,  C04B2/00 ,  C04B24/26 ,  C04B24/28 ,  C08J3/05 ,  C08K3/22 ,  C08K3/34 ,  C04B103/00

Abstract: The invention relates to a process for modifying polymer particles of an aqueous polymer dispersion in which positively or negatively charged polymer particles are provided with an inorganic salt shell. The inorganic shell leads to an improved drying ability and storage stability of the latex and improves the storage stability of the resulting polymer powder. The obtained polymer powder exhibits an improved viscosity and faster skin-forming time in the final application and is therefore particularly useful in a building material composition.