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US 7,968,202 B2Granted
Method for sealing natural stones
AssigneeEvonik Degussa GmbH
InventorsEdwin Nun, Volker Hennige, Uwe Paulmann, Hannelore Armoneit, Sigrid Banken, Marie-Theres Wilkes, Norbert Kern, Christian Herkt-Bruns, Thomas Schrief, Eckart Berendes
Life of this patent
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Abstract
The present invention relates to a sealed natural cut stone, the pores of which are permeable to water vapor but are impermeable to aqueous liquids, and a method for the production thereof and the use of such natural cut stones.
Claims10
A sealed natural cut stone comprising:
- a natural cut stone having pores therein;
- and
- a matrix material filled in at least pores of the natural cut stone which are accessible from a surface of the natural cut stone,
- wherein the matrix material has a network formed at least partly by silicon-oxygen bonds and comprises oxide particles of at least one element selected from the group consisting of Ti, Si, Zr, Al, Y, Sn and Ce,
- the silicon atoms present in the network have organic radicals bonded to the silicon atoms at least partly via carbon atoms,
- the oxide particles comprise, on surfaces thereof, the organic radicals bonded to silicon atoms and represented by a formula X1+2nCn—, where n=1 to 20 and X=hydrogen or fluorine, and
- X according to the formula denotes exclusively fluorine, exclusively hydrogen or both fluorine and hydrogen.
4 more elements
A sealed natural cut stone comprising:
- a natural cut stone having pores therein;
- and
- a matrix material filled in at least pores of the natural cut stone which are accessible from a surface of the natural cut stone,
- wherein the matrix material has a network formed at least partly by silicon-oxygen bonds, and the silicon atoms present in the network have organic radicals bonded to the silicon atoms at least partly via carbon atoms,
- wherein the natural cut stone is obtained by a method comprising:
- preparing a mixture of an alcohol, an initiator comprising one of an aqueous acid and an aqueous base, and a silane of a formula (Z1)1Si(OR)3, where Z1═OR or 3-glycidyloxypropyl, and R=identical or different alkyl radicals having 1 to 6 carbon atoms;
- mixing the mixture with a second silane of a formula (Z2)zSi(OR)4-z to prepare a flowable fluid composition, where R=an alkyl radical having 1 to 6 carbon atoms, and Z2═HaFbCn where a and b=integers, a+b=1+2n, z=1 or 2, and n=1 to 16, or where Z1=3-glycidyloxypropyl, Z2=3-aminopropyl, and z=1 when Z2 is 3-aminopropyl;
- introducing said flowable fluid composition into the pores accessible from a surface of a natural cut stone;
- and
- solidifying the flowable fluid composition in the pores.
7 more elements
Dependencies are inferred from the claim text.