US 11,833,233 B2
Alkali-swellable multi-functional rheology modifiers
Matthew Michael Vanderhoof, Hixson, TN (US); Klin Aloysius Rodrigues, Signal Mountain, TN (US); Sajal Pantha, Ooltewah, TN (US); and Andrew James Bailey, Chattanooga, TN (US)
Assigned to NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem (NL)
Appl. No. 16/764,523
Filed by NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem (NL)
PCT Filed Nov. 16, 2018, PCT No. PCT/EP2018/081522
§ 371(c)(1), (2) Date May 15, 2020,
PCT Pub. No. WO2019/096976, PCT Pub. Date May 23, 2019.
Claims priority of provisional application 62/588,041, filed on Nov. 17, 2017.
Claims priority of application No. 18160646 (EP), filed on Mar. 8, 2017.
Prior Publication US 2021/0371567 A1, Dec. 2, 2021
Int. Cl. A01N 25/28 (2006.01); A61K 8/02 (2006.01); A61Q 19/00 (2006.01); C08F 265/06 (2006.01); A61K 8/81 (2006.01); A61Q 5/06 (2006.01); C08F 220/18 (2006.01); A61K 8/06 (2006.01); C08F 220/06 (2006.01); C08F 220/14 (2006.01)
CPC A61K 8/0283 (2013.01) [A61K 8/8147 (2013.01); A61Q 5/06 (2013.01); C08F 265/06 (2013.01); A61K 8/022 (2013.01); A61K 8/06 (2013.01); A61K 2800/654 (2013.01); C08F 220/06 (2013.01); C08F 220/14 (2013.01); C08F 220/1802 (2020.02)] 18 Claims
 
1. An alkali-swellable rheology modifier comprising a core-shell polymer, said core-shell polymer comprising a core polymer and a shell comprising at least one shell copolymer layer, wherein said core polymer and said at least one shell copolymer layer are each polymerized from a monomer mixture comprising a) one or more anionic ethylenically unsaturated monomers; and b) one or more hydrophobic ethylenically unsaturated monomers; the anionic ethylenically unsaturated monomer being present as greater than 10 mol % in the core polymer or at least one shell polymer layer; and the at least one shell copolymer layer being at least partially cross-linked and containing a mole percent of crosslinking monomer greater than the mole percent of crosslinking monomer in the core polymer,
with the proviso that if the mole percent of crosslinking monomer in the core polymer is zero, then the core-shell polymer satisfies at least one of the following conditions:
(i) the core polymer is polymerized from a monomer mixture that comprises at least one associative monomer; or
(ii) at least one shell copolymer layer is polymerized from monomer mixture that comprises at least one associative monomer.