Water-based composition with improved transparency
AssigneeSika Technology AG
InventorsSteffen MAIER, Javier LARA, Joel KUNZ
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Abstract
A single-component sealant or adhesive composition, including: 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 included 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 included in the composition with an amount of between 0.5 and 5 wt.-%, based on the total composition.
Claims14
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.
(canceled)
A method of making a single-component sealant or adhesive composition, comprising adding an epoxy- or carbodiimide-functional cross-linker C with an amount of between 0.5 and 5 wt.-%, based on the total composition, to an aqueous polymer dispersion having a pH of 7-12 and comprising at least one water-dispersed polymer P having a median particle size D50 of less than 150 nm, 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, to improve the transparency and water-resistance of the composition in the curing or cured state when in contact with water.
Dependencies are inferred from the claim text.