公开(公告)号：WO2022051201A1

公开(公告)日：2022-03-10

申请号：PCT/US2021/048155

申请日：2021-08-30

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： VERMA, Amit Kumar ,  BRECKWOLDT, Jörn ,  NEUBAUER, Jörg

IPC: C04B28/04 ,  C04B40/06

Abstract: The present invention provides dry mixes for skim coat mortars having improved pot life and workability while reducing cellulose ether dosage comprising a white cement, one or more fillers having a sieve average particle size of from 15 to 60 microns, from 0.25 to 0.5 wt.% of one or more gel-like crosslinked cellulose ethers containing polyether groups, preferably, a mixed cellulose ether having polyoxypropylene dioxyethylene ether crosslinks, and from 1 to 2.5 wt.% of one or more polymer redispersible powders (RDP). At least one gel-like crosslinked cellulose ether has a crossover point as measured by oscillation rheometry, at which storage modulus (G') and loss modulus (G") intersect and are identical, of 1.0 ω or less. The present invention also provides methods of using the dry mixes.

公开(公告)号：WO2022235562A1

公开(公告)日：2022-11-10

申请号：PCT/US2022/027273

申请日：2022-05-02

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： HILD, Alexandra ,  BRECKWOLDT, Jörn

IPC: C04B28/02 ,  C04B28/04

Abstract: The present invention provides dry mix compositions for cement-based tile adhesives having both improved open time and slip resistance comprising one or more gel-like crosslinked cellulose ethers containing polyether groups, preferably, a mixed cellulose ether having polyoxypropylene dioxyethylene ether crosslinks. The gel-like water-soluble crosslinked cellulose ethers containing polyether groups of the present invention are formed from low to medium viscosity cellulose ethers and contain polyether groups having from 2 to 15, or, preferably, 13 or fewer oxyalkylene groups, or, preferably, 7 or more oxyalkylene groups. The present invention also provides methods of using the dry mixes in cement-based tile adhesives.