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US 2025/0011514 A1Published application
Miktoarm star polymer as cement fluid additives
AssigneeSolenis Technologies, L.P.
InventorsLeo Zhaoqing Liu, Yanrong Lu
Life of this patent
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Abstract
Provided is Miktoarm star polymers, which are provided either as an aqueous solution or as thin micro-flakes. Also provided is a process of making the star polymers thereof. These polymers bear short polyacrylic segment(s) and long buoyant sulfonated polymer segment(s), which were found to be effective as additives for cement slurry water retention and as a plasticizer.
Claims20
A miktoarm star polymer comprising:
- one or more distinct polymer chain(s) bearing one or more of a functional monomeric unit chosen from carboxylic acid, phosphate acid ester, and phosphonate;
- one or more hydrophilic polymer chain(s) bearing one or more of the functional monomeric unit chosen from sulfonate and sulfate, and combinations thereof.
A process of producing a miktoarm star polymer comprising:
- a) preparing a thiol-bearing telechelic polymer chain by polymerizing a composition comprising monomers bearing carboxylic acids, phosphate acid esters, phosphonates, and combinations thereof;
- a polythiol or mercaptan-bearing moiety and a radical initiator;
- b) preparing a monomer solution comprising one or more monomer(s) bearing sulfonate or sulfate functional groups to form one or more hydrophilic polymer chain(s) or segment(s);
- c) combining the thiol-bearing telechelic polymer chain from step a) with the monomer solution containing one or more functional monomers bearing sulfonate or sulfate of step b) and initiating polymerization with radical initiator(s);
- d) continuing the polymerization reaction until the thiol concentration is non-detectable by using Ellman assay techniques thereby producing a miktoarm star polymer diverging from a moiety bearing polyfunctional radical transfer functions chosen from thiol or mercaptan functional groups, phosphinic acid, phosphites, and combinations thereof.
2 more elements
A method for reducing fluid loss in mortar or concrete processes comprising:
- providing a mortar ground or concrete slurry;
- adding to the mortar ground or concrete slurry a miktoarm star polymer comprising one or more one or more distinct polymer chain bearing one or more of functional monomeric unit chosen from carboxylic acid, phosphate acid ester, and phosphonate;
- one or more hydrophilic polymer chain(s) bearing one or more functional monomeric units chosen from sulfonate and sulfate, and combinations thereof.
Dependencies are inferred from the claim text.