IP Library › Granted Patent US 12709683
Granted Patent B2
US 12709683 · App. 17/562,188 · Granted Aug 18, 2026

Impregnation cream, use and method for preparing the impregnation cream

Inventor: Wolfgang Hechtl (Burghausen, DE)
C08L83/06C04B41/4961C04B41/4966C09D183/06
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Quick Facts
Patent No.
US 12709683
App. No.
17/562,188
Granted
Aug 18, 2026
Kind
B2
Abstract

The invention relates to an impregnation cream. The impregnation cream contains water, at least one emulsifier and at least one polydimethylsiloxane selected from: HO—(SiMe 2 O) n —H and Me 3 SiO—(SiMe 2 O) n —SiMe 3 , wherein n is an integer from 20 to 2500, wherein the impregnation cream is free of hydrocarbons, alkoxylated silanes, alkoxylated siloxanes and amine group-functionalized siloxanes.

Claims (21)

1 . An impregnation cream comprising:

water,

one emulsifier, and

at least one polydimethylsiloxane selected from:

HO—(SiMe 2 O) n —H and Me 3 SiO—(SiMe 2 O) n —SiMe 3 , wherein n is an integer from 20 to 2500, the impregnation cream being free from hydrocarbons, alkoxylated silanes, alkoxylated siloxanes, additional emulsifiers, and amine group-functionalized siloxanes,

wherein a proportion of the polydimethylsiloxane, based on the total mass of the impregnation cream, is 70 to 88 mass %;

wherein the one emulsifier is isotridecyl alcohol polyglycol ether,

and wherein an amount of the one emulsifier, based on the total mass of the impregnation cream is 0.4 to 2 mass %.

2 . The impregnation cream of claim 1 , consisting of:

water,

the one emulsifier, and

the at least one polydimethylsiloxane selected from:

HO—(SiMe 2 O) n —H and Me 3 SiO—(SiMe 2 O) n —SiMe 3 , wherein n is an integer from 20 to 2500, and optionally at least one additive, a total amount of the additives, based on the total mass of the impregnation cream, being less than 3% by mass.

3 . The impregnation cream of claim 1 , wherein the one emulsifier is an alkoxylated emulsifier having an HLB value of at least 9.

4 . The impregnation cream of claim 1 , wherein the one emulsifier has an HLB value of at least 10.

5 . The impregnation cream of claim 1 , wherein n in the formulae shown in claim 1 is an integer from 50 to 1800.

6 . The impregnation cream of claim 1 , wherein the viscosity of the polydimethylsiloxane at 25° C. is in a range from 20 to 350,000 mm2/s.

7 . A method for preparing the impregnation cream of claim 1 , comprising the steps of:

mixing the water and the one emulsifier until a homogeneous mixture is formed; and

admixing the at least one polydimethylsiloxane into the homogeneous mixture until a homogeneous whitish-colored cream is formed.

8 . A method of impregnating mineral building materials, the method comprising applying the impregnation cream of claim 1 to the mineral building materials.