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US 8,946,338 B2Granted
Aqueous silicon dioxide dispersions for sealant and adhesive formulations
AssigneeAkzo Nobel Chemicals International B.V.
InventorsDietrich Pantke, Peter-Nikolaus Schmitz, Hartmut Melzer, Rüdiger Musch
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Abstract
The invention relates to aqueous dispersions, characterized in that they comprise (c) at least one aqueous silicon dioxide dispersion with a mean particle diameter of the SiO2-particles of 1 to 400 nm and (d) at least one water-soluble hydroxyl-containing organic compound, to a process for their preparation and to their use in adhesive and coating formulations.
Claims13
An aqueous dispersion comprising:
- (a) at least one aqueous silica dispersion which comprises SiO2-particles having a mean particle diameter in the range of 1 to 400 nm wherein the content of dispersed silica is from 99.5 wt.% to 45 wt.%;
- and
- (b) at least one water-soluble hydroxyl group-containing organic compound selected from hydroxylalkyl celluloses, polyvinyl alcohols or cyclodextrins in an amount of 0.5 wt.% to 55 wt.% with the percentages being based on the weight of nonvolatile constituents and adding up to 100 wt.%;
- and
- wherein the water-soluble hydroxyl group-containing organic compound is dissolved in the silica dispersion, and
- (c) at least one polymer dispersion wherein the storage modulus of said polymer dispersion is in the range of 0.02 to 2 MPa at temperatures of 30° C. to 100° C.
3 more elements
A formulation comprising:
- (a) at least one aqueous silica dispersion which comprises SiO2-particles having a mean particle diameter in the range of 1 to 400 nm,
- (b) at least one water-soluble hydroxyl group-containing organic compound, and
- (c) at least one polymer dispersion, wherein said at least one polymer dispersion is a lattice of polymers chosen from polymers made of dienes or olefinically unsaturated monomers or copolymers thereof, wherein the storage modulus of said polymer dispersion is in the range of 0.02 to 2 MPa at temperatures of 30° C. to 100° C., and wherein the formulation contains (a) and (b) in the range of 3 wt% to 45 wt% and (c) in the range of 97 wt% to 55 wt% with the percentage values being based on the weight of nonvolatile constituents and adding up to 100 wt%.
An aqueous dispersion comprising:
- (a) at least one aqueous silica dispersion which comprises SiO2-particles having a mean particle diameter in the range of 1 to 400 nm;
- and
- (b) at least one water-soluble hydroxyl group-containing organic compound;
- wherein the water-soluble hydroxyl group-containing organic compound is dissolved in the silica dispersion, wherein the at least one water-soluble hydroxyl group-containing organic compound is a cyclodextrin, and
- (c) at least one polymer dispersion, wherein said at least one polymer dispersion is a lattice of polymers chosen from polymers made of dienes or olefinically unsaturated monomers or copolymers thereof, wherein the storage modulus of said polymer dispersion is in the range of 0.02 to 2MPa at temperatures of 30° C. to 100° C., and wherein the formulation contains (a) and (b) in the range of 3 wt% to 45 wt% and (c) in the range of 97 wt% to 55 wt% with the percentage values being based on the weight of nonvolatile constituents and adding up to 100 wt%.
2 more elements
Dependencies are inferred from the claim text.