	US 11,737,961 B2
	Preservation mixtures, and polymer solutions stabilized therewith
Bernd de Potzolli, Bad Duerkheim (DE); Monika Rausch, Dannstadt-Schauernheim (DE); and Karin Juhkason, Niederkirchen (DE)
Assigned to BASF SE, Ludwigshafen (DE)
Appl. No. 15/126,706
Filed by BASF SE, Ludwigshafen (DE)
PCT Filed Mar. 13, 2015, PCT No. PCT/EP2015/055291 § 371(c)(1), (2) Date Sep. 16, 2016, PCT Pub. No. WO2015/144458, PCT Pub. Date Oct. 1, 2015.
Claims priority of application No. 14161479 (EP), filed on Mar. 25, 2014.
Prior Publication US 2017/0087070 A1, Mar. 30, 2017
Int. Cl. A61K 8/34 (2006.01); A61Q 5/00 (2006.01); A61Q 5/06 (2006.01); A61Q 5/02 (2006.01); A61Q 19/00 (2006.01); A61Q 19/10 (2006.01)

CPC A61K 8/345 (2013.01) [A61K 8/34 (2013.01); A61Q 5/00 (2013.01); A61Q 5/02 (2013.01); A61Q 5/06 (2013.01); A61Q 19/00 (2013.01); A61Q 19/10 (2013.01); A61K 2800/30 (2013.01); A61K 2800/524 (2013.01)]

9 Claims

1. An aqueous 2-methylisothiazolin-3-one-free polymer solution stabilized with a preservative mixture of phenoxyethanol and at least one further alcohol,

wherein the polymer is selected from the group consisting of vinyllactam polymers, polyurethanes, and mixtures thereof, and wherein the preservative mixture comprises the following constituents as active biocidal ingredients:

from 25 to 50% by weight of a mixture composed of 50% 3-phenylpropanol, 25% 1,3-propanediol, and 25% 1,2-octanediol, and

from 50 to 75% by weight of phenoxyethanol, and the preservative mixture is used in an amount of from 0.10 to 1.40% by weight in the aqueous polymer solution,

or the preservative mixture comprises the following constituents as active biocidal ingredients:

from 20 to 57% by weight of a mixture composed of 50% 1,2-pentanediol, 30% 1,2-octanediol, and 20% 1,2-decanediol, and

from 43 to 80% by weight of phenoxyethanol, and the preservative mixture is used in an amount of from 0.20 to 1.40% by weight in the aqueous polymer solution.