Use of polyurethane powder as inner additive of redispersible polymer powder
First Claim
1. A water-redispersible polymer powder composite comprising a co-dried admixture of a water insoluble film-forming polymer, a colloidal stabilizer, and a powdered polyurethane foam, the amount of the powdered polyurethane foam being from 1% by weight to 99% by weight, based upon the total weight of the water-redispersible polymer powder composite, wherein the powdered polyurethane foam is a ground recycled rigid polyurethane foam having an average particle size of from 5 microns to 500 microns and the water-redispersible polymer powder composite has an average particle size of from 20 to 150 microns.
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Abstract
A powdered polyurethane, preferably a powdered recycled polyurethane rigid foam is co-dried with a water insoluble film-forming polymer to obtain a redispersible polymer powder composite for use in hydraulic binders or cementitious compositions to improve performance of cementitious compositions or mortar, in applications such as cement based the adhesives (CBTA), or external thermal insulating composite systems (ETICS).
11 Citations
7 Claims
- 1. A water-redispersible polymer powder composite comprising a co-dried admixture of a water insoluble film-forming polymer, a colloidal stabilizer, and a powdered polyurethane foam, the amount of the powdered polyurethane foam being from 1% by weight to 99% by weight, based upon the total weight of the water-redispersible polymer powder composite, wherein the powdered polyurethane foam is a ground recycled rigid polyurethane foam having an average particle size of from 5 microns to 500 microns and the water-redispersible polymer powder composite has an average particle size of from 20 to 150 microns.
- 5. A method for producing a water redispersible polymer powder composite comprising drying an aqueous mixture of a water insoluble film-forming polymer, a colloidal stabilizer, and a powdered polyurethane foam to obtain a water redispersible polymer powder composite, the amount of the powdered polyurethane foam being from 1% by weight to 99% by weight, based upon the total weight of the water-redispersible polymer powder composite, the powdered polyurethane foam being a ground recycled rigid polyurethane foam having an average particle size of from 5 microns to 500 microns, and the water-redispersible polymer powder composite having an average particle size from 20 to 150 microns.
Specification