	US 11,873,421 B2
	Water-based composition with improved transparency
Steffen Maier, Wettingen (CH); Javier Lara, Corregidora (MX); and Joel Kunz, Zurich (CH)
Assigned to SIKA TECHNOLOGY AG, Baar (CH)
Appl. No. 17/418,338
Filed by SIKA TECHNOLOGY AG, Baar (CH)
PCT Filed Mar. 16, 2020, PCT No. PCT/EP2020/057150 § 371(c)(1), (2) Date Jun. 25, 2021, PCT Pub. No. WO2020/187854, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 19164283 (EP), filed on Mar. 21, 2019.
Prior Publication US 2022/0064503 A1, Mar. 3, 2022
Int. Cl. C09J 125/14 (2006.01); C09J 5/00 (2006.01); C09J 11/04 (2006.01); C09J 133/06 (2006.01)

CPC C09J 125/14 (2013.01) [C09J 5/00 (2013.01); C09J 11/04 (2013.01); C09J 133/062 (2013.01); C09J 2425/00 (2013.01); C09J 2433/00 (2013.01)]

13 Claims

1. A single-component sealant or adhesive composition, comprising:

a) an aqueous polymer dispersion comprising water and at least one water-dispersed polymer P having a median particle size D50 of less than 150 nm,

b) at least one water-dispersed or water-dissolved epoxy- or carbodiimide-functional cross-linker C,

wherein the pH of the composition is adjusted in the range of 7 to 12, and

wherein the at least one water-dispersed polymer P is comprised in the composition with an amount of at least 45 wt.-%, based on the total composition, and

wherein the epoxy- or carbodiimide-functional cross-linker C is comprised in the composition with an amount of between 0.5 and 5 wt.-%, based on the total composition.